Attachment 372205 Details for Bug 195276 – Patch

[patch] Patch

bug-195276-20190615175123.patch (text/plain), 2.13 MB, created by Darin Adler on 2019-06-15 17:51:28 PDT

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Creator: Darin Adler

Created: 2019-06-15 17:51:28 PDT

Size: 2.13 MB

patch

obsolete

>Subversion Revision: 246468
>diff --git a/Source/JavaScriptCore/ChangeLog b/Source/JavaScriptCore/ChangeLog
>index b69160bbd2a5852e0875ad425ad3eb33c3e06244..c77202d0dd7dfbe54a50c508c86d2e69b4cb0f4e 100644
>--- a/Source/JavaScriptCore/ChangeLog
>+++ b/Source/JavaScriptCore/ChangeLog
>@@ -1,3 +1,12 @@
>+2019-06-15 Darin Adler <darin@apple.com>
>+
>+ Rename AtomicString to AtomString
>+ https://bugs.webkit.org/show_bug.cgi?id=195276
>+
>+ Reviewed by NOBODY (OOPS!).
>+
>+ * many files: Let do-webcore-rename do the renaming.
>+
> 2019-06-14 Keith Miller <keith_miller@apple.com>
> 
> Restore PAC based cage.
>diff --git a/Source/WTF/ChangeLog b/Source/WTF/ChangeLog
>index edf2cefd4c57477779414273caccbe94f929a621..04095687771800e7bf2f17cf1efc8ba1e3139068 100644
>--- a/Source/WTF/ChangeLog
>+++ b/Source/WTF/ChangeLog
>@@ -1,3 +1,16 @@
>+2019-06-15 Darin Adler <darin@apple.com>
>+
>+ Rename AtomicString to AtomString
>+ https://bugs.webkit.org/show_bug.cgi?id=195276
>+
>+ Reviewed by NOBODY (OOPS!).
>+
>+ * many files: Let do-webcore-rename do the renaming.
>+
>+ * wtf/text/AtomString.h: After renaming, added AtomicString as a synonym for
>+ now; helps smooth things over with a tiny bit of Apple internal software so
>+ we don't have to do this all at once. Can remove it soon.
>+
> 2019-06-12 Antoine Quint <graouts@apple.com>
> 
> Show the web page URL when sharing an AR model
>diff --git a/Source/WebCore/ChangeLog b/Source/WebCore/ChangeLog
>index 5c19611fdbdb840c871f874ae474657a0f2fd5a2..2bbdfb64d9d8cf1eeed515023f8e032b57be4031 100644
>--- a/Source/WebCore/ChangeLog
>+++ b/Source/WebCore/ChangeLog
>@@ -1,3 +1,12 @@
>+2019-06-15 Darin Adler <darin@apple.com>
>+
>+ Rename AtomicString to AtomString
>+ https://bugs.webkit.org/show_bug.cgi?id=195276
>+
>+ Reviewed by NOBODY (OOPS!).
>+
>+ * many files: Let do-webcore-rename do the renaming.
>+
> 2019-06-15 Zalan Bujtas <zalan@apple.com>
> 
> [LFC][BFC] Fix available width for non-floating positioned float avoiders.
>diff --git a/Source/WebKit/ChangeLog b/Source/WebKit/ChangeLog
>index 93429247ceb003a0fcd79785fff54873000eb6a3..89236675f77fdbc25aa9928917346096908d56ed 100644
>--- a/Source/WebKit/ChangeLog
>+++ b/Source/WebKit/ChangeLog
>@@ -1,3 +1,12 @@
>+2019-06-15 Darin Adler <darin@apple.com>
>+
>+ Rename AtomicString to AtomString
>+ https://bugs.webkit.org/show_bug.cgi?id=195276
>+
>+ Reviewed by NOBODY (OOPS!).
>+
>+ * many files: Let do-webcore-rename do the renaming.
>+
> 2019-06-15 Ludovico de Nittis <ludovico.denittis@collabora.com>
> 
> [GTK] Stop accessing GdkEvent fields when possible
>diff --git a/Source/WebKitLegacy/ios/ChangeLog b/Source/WebKitLegacy/ios/ChangeLog
>index 125ddda09e687407f16db66f6e199ced13ec0607..f6328242d5558ec49920e93ed43fdeef298f1493 100644
>--- a/Source/WebKitLegacy/ios/ChangeLog
>+++ b/Source/WebKitLegacy/ios/ChangeLog
>@@ -1,3 +1,12 @@
>+2019-06-15 Darin Adler <darin@apple.com>
>+
>+ Rename AtomicString to AtomString
>+ https://bugs.webkit.org/show_bug.cgi?id=195276
>+
>+ Reviewed by NOBODY (OOPS!).
>+
>+ * many files: Let do-webcore-rename do the renaming.
>+
> 2019-04-17 Brady Eidson <beidson@apple.com>
> 
> Link clicks in PDFs shouldn't send referrer headers.
>diff --git a/Source/WebKitLegacy/mac/ChangeLog b/Source/WebKitLegacy/mac/ChangeLog
>index af518c6014737b0559e98710fae7eacc938e53ea..216844ba94121765aa35e4974d81c357bd3d351f 100644
>--- a/Source/WebKitLegacy/mac/ChangeLog
>+++ b/Source/WebKitLegacy/mac/ChangeLog
>@@ -1,3 +1,12 @@
>+2019-06-15 Darin Adler <darin@apple.com>
>+
>+ Rename AtomicString to AtomString
>+ https://bugs.webkit.org/show_bug.cgi?id=195276
>+
>+ Reviewed by NOBODY (OOPS!).
>+
>+ * many files: Let do-webcore-rename do the renaming.
>+
> 2019-06-14 Megan Gardner <megan_gardner@apple.com>
> 
> Move Synthetic Editing Commands to behind an experimental feature flag
>diff --git a/Source/WebKitLegacy/win/ChangeLog b/Source/WebKitLegacy/win/ChangeLog
>index fa31067f6bcaaabd461039f72e87e5e73641efd8..23a7b113de972f9e98cdc7cf7146bc214af17024 100644
>--- a/Source/WebKitLegacy/win/ChangeLog
>+++ b/Source/WebKitLegacy/win/ChangeLog
>@@ -1,3 +1,12 @@
>+2019-06-15 Darin Adler <darin@apple.com>
>+
>+ Rename AtomicString to AtomString
>+ https://bugs.webkit.org/show_bug.cgi?id=195276
>+
>+ Reviewed by NOBODY (OOPS!).
>+
>+ * many files: Let do-webcore-rename do the renaming.
>+
> 2019-05-31 Don Olmstead <don.olmstead@sony.com>
> 
> [CMake] Add WebKit::WTF target
>diff --git a/Source/JavaScriptCore/API/JSClassRef.cpp b/Source/JavaScriptCore/API/JSClassRef.cpp
>index d4583d8e16515d614a59c9acc383a3cc111f60ad..f1c9d5702a8aa69044dfb295b471fcfcbc890b6b 100644
>--- a/Source/JavaScriptCore/API/JSClassRef.cpp
>+++ b/Source/JavaScriptCore/API/JSClassRef.cpp
>@@ -85,19 +85,19 @@ OpaqueJSClass::OpaqueJSClass(const JSClassDefinition* definition, OpaqueJSClass*
> OpaqueJSClass::~OpaqueJSClass()
> {
> // The empty string is shared across threads & is an identifier, in all other cases we should have done a deep copy in className(), below. 
>- ASSERT(!m_className.length() || !m_className.impl()->isAtomic());
>+ ASSERT(!m_className.length() || !m_className.impl()->isAtom());
> 
> #ifndef NDEBUG
> if (m_staticValues) {
> OpaqueJSClassStaticValuesTable::const_iterator end = m_staticValues->end();
> for (OpaqueJSClassStaticValuesTable::const_iterator it = m_staticValues->begin(); it != end; ++it)
>- ASSERT(!it->key->isAtomic());
>+ ASSERT(!it->key->isAtom());
> }
> 
> if (m_staticFunctions) {
> OpaqueJSClassStaticFunctionsTable::const_iterator end = m_staticFunctions->end();
> for (OpaqueJSClassStaticFunctionsTable::const_iterator it = m_staticFunctions->begin(); it != end; ++it)
>- ASSERT(!it->key->isAtomic());
>+ ASSERT(!it->key->isAtom());
> }
> #endif
> 
>@@ -131,7 +131,7 @@ OpaqueJSClassContextData::OpaqueJSClassContextData(JSC::VM&, OpaqueJSClass* jsCl
> staticValues = std::make_unique<OpaqueJSClassStaticValuesTable>();
> OpaqueJSClassStaticValuesTable::const_iterator end = jsClass->m_staticValues->end();
> for (OpaqueJSClassStaticValuesTable::const_iterator it = jsClass->m_staticValues->begin(); it != end; ++it) {
>- ASSERT(!it->key->isAtomic());
>+ ASSERT(!it->key->isAtom());
> String valueName = it->key->isolatedCopy();
> staticValues->add(valueName.impl(), std::make_unique<StaticValueEntry>(it->value->getProperty, it->value->setProperty, it->value->attributes, valueName));
> }
>@@ -141,7 +141,7 @@ OpaqueJSClassContextData::OpaqueJSClassContextData(JSC::VM&, OpaqueJSClass* jsCl
> staticFunctions = std::make_unique<OpaqueJSClassStaticFunctionsTable>();
> OpaqueJSClassStaticFunctionsTable::const_iterator end = jsClass->m_staticFunctions->end();
> for (OpaqueJSClassStaticFunctionsTable::const_iterator it = jsClass->m_staticFunctions->begin(); it != end; ++it) {
>- ASSERT(!it->key->isAtomic());
>+ ASSERT(!it->key->isAtom());
> staticFunctions->add(it->key->isolatedCopy(), std::make_unique<StaticFunctionEntry>(it->value->callAsFunction, it->value->attributes));
> }
> }
>@@ -157,7 +157,7 @@ OpaqueJSClassContextData& OpaqueJSClass::contextData(ExecState* exec)
> 
> String OpaqueJSClass::className()
> {
>- // Make a deep copy, so that the caller has no chance to put the original into AtomicStringTable.
>+ // Make a deep copy, so that the caller has no chance to put the original into AtomStringTable.
> return m_className.isolatedCopy();
> }
> 
>diff --git a/Source/JavaScriptCore/API/JSClassRef.h b/Source/JavaScriptCore/API/JSClassRef.h
>index 90c4f539005c82b0e23ab91207699aea4a039a89..0dd0dca54c043895e9e03badb9015fbaef8b29b8 100644
>--- a/Source/JavaScriptCore/API/JSClassRef.h
>+++ b/Source/JavaScriptCore/API/JSClassRef.h
>@@ -121,7 +121,7 @@ private:
> 
> OpaqueJSClassContextData& contextData(JSC::ExecState*);
> 
>- // Strings in these data members should not be put into any AtomicStringTable.
>+ // Strings in these data members should not be put into any AtomStringTable.
> String m_className;
> std::unique_ptr<OpaqueJSClassStaticValuesTable> m_staticValues;
> std::unique_ptr<OpaqueJSClassStaticFunctionsTable> m_staticFunctions;
>diff --git a/Source/JavaScriptCore/b3/B3AtomicValue.h b/Source/JavaScriptCore/b3/B3AtomicValue.h
>index 085a9e194957b2476fb12f5db2c33d81cd762bbe..9f2b52d7a2761e8e416f8302a966fe07c70deb7f 100644
>--- a/Source/JavaScriptCore/b3/B3AtomicValue.h
>+++ b/Source/JavaScriptCore/b3/B3AtomicValue.h
>@@ -36,7 +36,7 @@ class JS_EXPORT_PRIVATE AtomicValue : public MemoryValue {
> public:
> static bool accepts(Kind kind)
> {
>- return isAtomic(kind.opcode());
>+ return isAtom(kind.opcode());
> }
> 
> ~AtomicValue();
>diff --git a/Source/JavaScriptCore/b3/B3MemoryValue.h b/Source/JavaScriptCore/b3/B3MemoryValue.h
>index aac382849666ac61db9da31eefd91bf3f2bd8b96..b998aedc93f77cc7138107a963a9977f6be74bfa 100644
>--- a/Source/JavaScriptCore/b3/B3MemoryValue.h
>+++ b/Source/JavaScriptCore/b3/B3MemoryValue.h
>@@ -74,7 +74,7 @@ public:
> bool isLoad() const { return B3::isLoad(opcode()); }
> 
> bool hasFence() const { return !!fenceRange(); }
>- bool isExotic() const { return hasFence() || isAtomic(opcode()); }
>+ bool isExotic() const { return hasFence() || isAtom(opcode()); }
> 
> Type accessType() const;
> Bank accessBank() const;
>diff --git a/Source/JavaScriptCore/b3/B3Opcode.h b/Source/JavaScriptCore/b3/B3Opcode.h
>index aadf39b4cd6d86a20c78bfb5a66dcae10e03dd1b..7aa6de35bf40246698f1529931a3fff829cf5674 100644
>--- a/Source/JavaScriptCore/b3/B3Opcode.h
>+++ b/Source/JavaScriptCore/b3/B3Opcode.h
>@@ -465,7 +465,7 @@ inline bool isLoadStore(Opcode opcode)
> }
> }
> 
>-inline bool isAtomic(Opcode opcode)
>+inline bool isAtom(Opcode opcode)
> {
> switch (opcode) {
> case AtomicWeakCAS:
>@@ -510,7 +510,7 @@ inline bool isAtomicXchg(Opcode opcode)
> 
> inline bool isMemoryAccess(Opcode opcode)
> {
>- return isAtomic(opcode) || isLoadStore(opcode);
>+ return isAtom(opcode) || isLoadStore(opcode);
> }
> 
> inline Opcode signExtendOpcode(Width width)
>diff --git a/Source/JavaScriptCore/bytecode/SpeculatedType.cpp b/Source/JavaScriptCore/bytecode/SpeculatedType.cpp
>index 24e54ef7e7d1050905deb3b472bd4a0e2dc737cd..701192f0e204e539013a109042c440333f7bd038 100644
>--- a/Source/JavaScriptCore/bytecode/SpeculatedType.cpp
>+++ b/Source/JavaScriptCore/bytecode/SpeculatedType.cpp
>@@ -494,7 +494,7 @@ SpeculatedType speculationFromCell(JSCell* cell)
> if (cell->isString()) {
> JSString* string = jsCast<JSString*>(cell);
> if (const StringImpl* impl = string->tryGetValueImpl()) {
>- if (impl->isAtomic())
>+ if (impl->isAtom())
> return SpecStringIdent;
> }
> return SpecString;
>diff --git a/Source/JavaScriptCore/bytecompiler/BytecodeGenerator.cpp b/Source/JavaScriptCore/bytecompiler/BytecodeGenerator.cpp
>index abe4166c5b86e3220ae73a4a48118023f21f74ca..515b5983f6a1d5805d2fb481ecc0a97cd599d7b9 100644
>--- a/Source/JavaScriptCore/bytecompiler/BytecodeGenerator.cpp
>+++ b/Source/JavaScriptCore/bytecompiler/BytecodeGenerator.cpp
>@@ -888,7 +888,7 @@ BytecodeGenerator::BytecodeGenerator(VM& vm, EvalNode* evalNode, UnlinkedEvalCod
> Vector<Identifier, 0, UnsafeVectorOverflow> hoistedFunctions;
> for (auto& entry : varDeclarations) {
> ASSERT(entry.value.isVar());
>- ASSERT(entry.key->isAtomic() || entry.key->isSymbol());
>+ ASSERT(entry.key->isAtom() || entry.key->isSymbol());
> if (entry.value.isSloppyModeHoistingCandidate())
> hoistedFunctions.append(Identifier::fromUid(m_vm, entry.key.get()));
> else
>diff --git a/Source/JavaScriptCore/dfg/DFGAbstractInterpreterInlines.h b/Source/JavaScriptCore/dfg/DFGAbstractInterpreterInlines.h
>index c6368ee848eddfddf9aea5e02a89f4004ac4b792..2e0d01d874b6596cf3eafa121c69a8221b8cc787 100644
>--- a/Source/JavaScriptCore/dfg/DFGAbstractInterpreterInlines.h
>+++ b/Source/JavaScriptCore/dfg/DFGAbstractInterpreterInlines.h
>@@ -3584,7 +3584,7 @@ bool AbstractInterpreter<AbstractStateType>::executeEffects(unsigned clobberLimi
> if (constant.isString()) {
> JSString* string = asString(constant);
> const StringImpl* impl = string->tryGetValueImpl();
>- if (impl && impl->isAtomic())
>+ if (impl && impl->isAtom())
> m_state.setFoundConstants(true);
> }
> }
>diff --git a/Source/JavaScriptCore/dfg/DFGAbstractValue.cpp b/Source/JavaScriptCore/dfg/DFGAbstractValue.cpp
>index 1ca9b74e7162efc21082b686371ec3427a972927..19f93b70c104f58dcd142ceb3cdbac0adc8cdc2e 100644
>--- a/Source/JavaScriptCore/dfg/DFGAbstractValue.cpp
>+++ b/Source/JavaScriptCore/dfg/DFGAbstractValue.cpp
>@@ -379,7 +379,7 @@ void AbstractValue::filterValueByType()
> 
> // We assume that the constant value can produce a narrower type at
> // some point. For example, rope JSString produces SpecString, but
>- // it produces SpecStringIdent once it is resolved to AtomicStringImpl.
>+ // it produces SpecStringIdent once it is resolved to AtomStringImpl.
> // We do not make this AbstractValue cleared, but clear the constant
> // value if validation fails currently.
> m_value = JSValue();
>diff --git a/Source/JavaScriptCore/dfg/DFGConstantFoldingPhase.cpp b/Source/JavaScriptCore/dfg/DFGConstantFoldingPhase.cpp
>index 4a2f1420ef429ceda807876ba27e0abafd18dd36..62b79ffab3843c6ddc68f0880337fa9be25b091e 100644
>--- a/Source/JavaScriptCore/dfg/DFGConstantFoldingPhase.cpp
>+++ b/Source/JavaScriptCore/dfg/DFGConstantFoldingPhase.cpp
>@@ -323,7 +323,7 @@ private:
> // However, a constant value propagated in DFG is not filtered.
> // So here, we check the propagated value is actually an atomic string.
> // And if it's not, we just ignore.
>- if (impl->isAtomic())
>+ if (impl->isAtom())
> constantUid = static_cast<const UniquedStringImpl*>(impl);
> }
> }
>@@ -675,7 +675,7 @@ private:
> if (constant.isString()) {
> JSString* string = asString(constant);
> const StringImpl* impl = string->tryGetValueImpl();
>- if (impl && impl->isAtomic()) {
>+ if (impl && impl->isAtom()) {
> unsigned identifierNumber = m_graph.identifiers().ensure(const_cast<UniquedStringImpl*>(static_cast<const UniquedStringImpl*>(impl)));
> node->convertToInById(identifierNumber);
> changed = true;
>diff --git a/Source/JavaScriptCore/dfg/DFGLazyJSValue.cpp b/Source/JavaScriptCore/dfg/DFGLazyJSValue.cpp
>index 43bead62ff9be10d6e1af1617a97d96e091281e6..583ee5b3198b9dd7f26cf54b3a9af703df715f6f 100644
>--- a/Source/JavaScriptCore/dfg/DFGLazyJSValue.cpp
>+++ b/Source/JavaScriptCore/dfg/DFGLazyJSValue.cpp
>@@ -53,7 +53,7 @@ JSValue LazyJSValue::getValue(VM& vm) const
> case KnownStringImpl:
> return jsString(&vm, u.stringImpl);
> case NewStringImpl:
>- return jsString(&vm, AtomicStringImpl::add(u.stringImpl));
>+ return jsString(&vm, AtomStringImpl::add(u.stringImpl));
> }
> RELEASE_ASSERT_NOT_REACHED();
> return JSValue();
>diff --git a/Source/JavaScriptCore/dfg/DFGOperations.cpp b/Source/JavaScriptCore/dfg/DFGOperations.cpp
>index 5cb276f3f19fcf81ebff3efdcd7be0153947e96b..c425ea96e78e71c9d91363f2eedff53233a953ce 100644
>--- a/Source/JavaScriptCore/dfg/DFGOperations.cpp
>+++ b/Source/JavaScriptCore/dfg/DFGOperations.cpp
>@@ -712,10 +712,10 @@ EncodedJSValue JIT_OPERATION operationGetByVal(ExecState* exec, EncodedJSValue e
> } else if (property.isString()) {
> Structure& structure = *base->structure(vm);
> if (JSCell::canUseFastGetOwnProperty(structure)) {
>- RefPtr<AtomicStringImpl> existingAtomicString = asString(property)->toExistingAtomicString(exec);
>+ RefPtr<AtomStringImpl> existingAtomString = asString(property)->toExistingAtomString(exec);
> RETURN_IF_EXCEPTION(scope, encodedJSValue());
>- if (existingAtomicString) {
>- if (JSValue result = base->fastGetOwnProperty(vm, structure, existingAtomicString.get()))
>+ if (existingAtomString) {
>+ if (JSValue result = base->fastGetOwnProperty(vm, structure, existingAtomString.get()))
> return JSValue::encode(result);
> }
> }
>@@ -749,10 +749,10 @@ EncodedJSValue JIT_OPERATION operationGetByValCell(ExecState* exec, JSCell* base
> } else if (property.isString()) {
> Structure& structure = *base->structure(vm);
> if (JSCell::canUseFastGetOwnProperty(structure)) {
>- RefPtr<AtomicStringImpl> existingAtomicString = asString(property)->toExistingAtomicString(exec);
>+ RefPtr<AtomStringImpl> existingAtomString = asString(property)->toExistingAtomString(exec);
> RETURN_IF_EXCEPTION(scope, encodedJSValue());
>- if (existingAtomicString) {
>- if (JSValue result = base->fastGetOwnProperty(vm, structure, existingAtomicString.get()))
>+ if (existingAtomString) {
>+ if (JSValue result = base->fastGetOwnProperty(vm, structure, existingAtomString.get()))
> return JSValue::encode(result);
> }
> }
>@@ -1509,10 +1509,10 @@ EncodedJSValue JIT_OPERATION operationGetByValWithThis(ExecState* exec, EncodedJ
> if (LIKELY(baseValue.isCell() && subscript.isString())) {
> Structure& structure = *baseValue.asCell()->structure(vm);
> if (JSCell::canUseFastGetOwnProperty(structure)) {
>- RefPtr<AtomicStringImpl> existingAtomicString = asString(subscript)->toExistingAtomicString(exec);
>+ RefPtr<AtomStringImpl> existingAtomString = asString(subscript)->toExistingAtomString(exec);
> RETURN_IF_EXCEPTION(scope, encodedJSValue());
>- if (existingAtomicString) {
>- if (JSValue result = baseValue.asCell()->fastGetOwnProperty(vm, structure, existingAtomicString.get()))
>+ if (existingAtomString) {
>+ if (JSValue result = baseValue.asCell()->fastGetOwnProperty(vm, structure, existingAtomString.get()))
> return JSValue::encode(result);
> }
> }
>diff --git a/Source/JavaScriptCore/dfg/DFGSpeculativeJIT32_64.cpp b/Source/JavaScriptCore/dfg/DFGSpeculativeJIT32_64.cpp
>index 9d382cf616d9d32775be9750899d0c9ae853dd8b..75f102bc4fdc63329f2ddfde819de0460644668e 100644
>--- a/Source/JavaScriptCore/dfg/DFGSpeculativeJIT32_64.cpp
>+++ b/Source/JavaScriptCore/dfg/DFGSpeculativeJIT32_64.cpp
>@@ -3923,7 +3923,7 @@ void SpeculativeJIT::compile(Node* node)
> RELEASE_ASSERT_NOT_REACHED();
> }
> 
>- // Note that we don't test if the hash is zero here. AtomicStringImpl's can't have a zero
>+ // Note that we don't test if the hash is zero here. AtomStringImpl's can't have a zero
> // hash, however, a SymbolImpl may. But, because this is a cache, we don't care. We only
> // ever load the result from the cache if the cache entry matches what we are querying for.
> // So we either get super lucky and use zero for the hash and somehow collide with the entity
>diff --git a/Source/JavaScriptCore/dfg/DFGSpeculativeJIT64.cpp b/Source/JavaScriptCore/dfg/DFGSpeculativeJIT64.cpp
>index 2d62faa8c33ac9499f503fdb240476db63a61e92..f3a0b2bc6fcf3c24425ac6d3aa30da265b94b750 100644
>--- a/Source/JavaScriptCore/dfg/DFGSpeculativeJIT64.cpp
>+++ b/Source/JavaScriptCore/dfg/DFGSpeculativeJIT64.cpp
>@@ -4490,7 +4490,7 @@ void SpeculativeJIT::compile(Node* node)
> RELEASE_ASSERT_NOT_REACHED();
> }
> 
>- // Note that we don't test if the hash is zero here. AtomicStringImpl's can't have a zero
>+ // Note that we don't test if the hash is zero here. AtomStringImpl's can't have a zero
> // hash, however, a SymbolImpl may. But, because this is a cache, we don't care. We only
> // ever load the result from the cache if the cache entry matches what we are querying for.
> // So we either get super lucky and use zero for the hash and somehow collide with the entity
>diff --git a/Source/JavaScriptCore/ftl/FTLLowerDFGToB3.cpp b/Source/JavaScriptCore/ftl/FTLLowerDFGToB3.cpp
>index 24ea97da75939781022d5fa3697cc6c43f1dc1a3..9cb6e8d3de4a73a625f60f13a1a6f1325b923683 100644
>--- a/Source/JavaScriptCore/ftl/FTLLowerDFGToB3.cpp
>+++ b/Source/JavaScriptCore/ftl/FTLLowerDFGToB3.cpp
>@@ -10440,17 +10440,17 @@ private:
> switch (m_node->child2().useKind()) {
> case StringUse: {
> LBasicBlock isNonEmptyString = m_out.newBlock();
>- LBasicBlock isAtomicString = m_out.newBlock();
>+ LBasicBlock isAtomString = m_out.newBlock();
> 
> keyAsValue = lowString(m_node->child2());
> m_out.branch(isNotRopeString(keyAsValue, m_node->child2()), usually(isNonEmptyString), rarely(slowCase));
> 
>- lastNext = m_out.appendTo(isNonEmptyString, isAtomicString);
>+ lastNext = m_out.appendTo(isNonEmptyString, isAtomString);
> uniquedStringImpl = m_out.loadPtr(keyAsValue, m_heaps.JSString_value);
> LValue isNotAtomic = m_out.testIsZero32(m_out.load32(uniquedStringImpl, m_heaps.StringImpl_hashAndFlags), m_out.constInt32(StringImpl::flagIsAtomic()));
>- m_out.branch(isNotAtomic, rarely(slowCase), usually(isAtomicString));
>+ m_out.branch(isNotAtomic, rarely(slowCase), usually(isAtomString));
> 
>- m_out.appendTo(isAtomicString, slowCase);
>+ m_out.appendTo(isAtomString, slowCase);
> break;
> }
> case SymbolUse: {
>@@ -10499,7 +10499,7 @@ private:
> 
> ASSERT(keyAsValue);
> 
>- // Note that we don't test if the hash is zero here. AtomicStringImpl's can't have a zero
>+ // Note that we don't test if the hash is zero here. AtomStringImpl's can't have a zero
> // hash, however, a SymbolImpl may. But, because this is a cache, we don't care. We only
> // ever load the result from the cache if the cache entry matches what we are querying for.
> // So we either get super lucky and use zero for the hash and somehow collide with the entity
>diff --git a/Source/JavaScriptCore/heap/Heap.cpp b/Source/JavaScriptCore/heap/Heap.cpp
>index a85207f12cf603f047881d164cc678274483ffee..d9def176d80d13c5b132ada708919e51ce417774 100644
>--- a/Source/JavaScriptCore/heap/Heap.cpp
>+++ b/Source/JavaScriptCore/heap/Heap.cpp
>@@ -150,7 +150,7 @@ bool isValidSharedInstanceThreadState(VM* vm)
> 
> bool isValidThreadState(VM* vm)
> {
>- if (vm->atomicStringTable() != Thread::current().atomicStringTable())
>+ if (vm->atomStringTable() != Thread::current().atomStringTable())
> return false;
> 
> if (vm->isSharedInstance() && !isValidSharedInstanceThreadState(vm))
>@@ -2105,7 +2105,7 @@ Heap::Ticket Heap::requestCollection(GCRequest request)
> stopIfNecessary();
> 
> ASSERT(vm()->currentThreadIsHoldingAPILock());
>- RELEASE_ASSERT(vm()->atomicStringTable() == Thread::current().atomicStringTable());
>+ RELEASE_ASSERT(vm()->atomStringTable() == Thread::current().atomStringTable());
> 
> LockHolder locker(*m_threadLock);
> // We may be able to steal the conn. That only works if the collector is definitely not running
>diff --git a/Source/JavaScriptCore/jit/JITOperations.cpp b/Source/JavaScriptCore/jit/JITOperations.cpp
>index fbd6d7369b952cd977cc5223a1db8ab9836f96ac..7ba1823586a87800b3f02a96229ccba71f25084e 100644
>--- a/Source/JavaScriptCore/jit/JITOperations.cpp
>+++ b/Source/JavaScriptCore/jit/JITOperations.cpp
>@@ -1841,12 +1841,12 @@ static JSValue getByVal(ExecState* exec, JSValue baseValue, JSValue subscript, B
> if (LIKELY(baseValue.isCell() && subscript.isString())) {
> Structure& structure = *baseValue.asCell()->structure(vm);
> if (JSCell::canUseFastGetOwnProperty(structure)) {
>- RefPtr<AtomicStringImpl> existingAtomicString = asString(subscript)->toExistingAtomicString(exec);
>+ RefPtr<AtomStringImpl> existingAtomString = asString(subscript)->toExistingAtomString(exec);
> RETURN_IF_EXCEPTION(scope, JSValue());
>- if (existingAtomicString) {
>- if (JSValue result = baseValue.asCell()->fastGetOwnProperty(vm, structure, existingAtomicString.get())) {
>+ if (existingAtomString) {
>+ if (JSValue result = baseValue.asCell()->fastGetOwnProperty(vm, structure, existingAtomString.get())) {
> ASSERT(exec->bytecodeOffset());
>- if (byValInfo->stubInfo && byValInfo->cachedId.impl() != existingAtomicString)
>+ if (byValInfo->stubInfo && byValInfo->cachedId.impl() != existingAtomString)
> byValInfo->tookSlowPath = true;
> return result;
> }
>diff --git a/Source/JavaScriptCore/llint/LLIntSlowPaths.cpp b/Source/JavaScriptCore/llint/LLIntSlowPaths.cpp
>index b3be9d815863d8b822caf59b3ba79410bd6c3eaf..1712378cddb5a88fcbd12e16dda85264129ec363 100644
>--- a/Source/JavaScriptCore/llint/LLIntSlowPaths.cpp
>+++ b/Source/JavaScriptCore/llint/LLIntSlowPaths.cpp
>@@ -932,10 +932,10 @@ static ALWAYS_INLINE JSValue getByVal(VM& vm, ExecState* exec, OpGetByVal byteco
> if (LIKELY(baseValue.isCell() && subscript.isString())) {
> Structure& structure = *baseValue.asCell()->structure(vm);
> if (JSCell::canUseFastGetOwnProperty(structure)) {
>- RefPtr<AtomicStringImpl> existingAtomicString = asString(subscript)->toExistingAtomicString(exec);
>+ RefPtr<AtomStringImpl> existingAtomString = asString(subscript)->toExistingAtomString(exec);
> RETURN_IF_EXCEPTION(scope, JSValue());
>- if (existingAtomicString) {
>- if (JSValue result = baseValue.asCell()->fastGetOwnProperty(vm, structure, existingAtomicString.get()))
>+ if (existingAtomString) {
>+ if (JSValue result = baseValue.asCell()->fastGetOwnProperty(vm, structure, existingAtomString.get()))
> return result;
> }
> }
>diff --git a/Source/JavaScriptCore/parser/Parser.cpp b/Source/JavaScriptCore/parser/Parser.cpp
>index 45ac90801ec032e3271b2861fc287d39fa35ae9b..64b030885e37730004a9744d9ab7d43c4e29da7d 100644
>--- a/Source/JavaScriptCore/parser/Parser.cpp
>+++ b/Source/JavaScriptCore/parser/Parser.cpp
>@@ -928,7 +928,7 @@ template <class TreeBuilder> TreeDestructuringPattern Parser<LexerType>::createB
> {
> ASSERT(!name.isNull());
> 
>- ASSERT(name.impl()->isAtomic() || name.impl()->isSymbol());
>+ ASSERT(name.impl()->isAtom() || name.impl()->isSymbol());
> 
> switch (kind) {
> case DestructuringKind::DestructureToVariables: {
>diff --git a/Source/JavaScriptCore/runtime/ArrayPrototype.cpp b/Source/JavaScriptCore/runtime/ArrayPrototype.cpp
>index 43eec84cc4596e85742116cd301ca931f2dfd7a1..57a8695b31546fd6b7591ea993d6d65cfdd8c280 100644
>--- a/Source/JavaScriptCore/runtime/ArrayPrototype.cpp
>+++ b/Source/JavaScriptCore/runtime/ArrayPrototype.cpp
>@@ -686,7 +686,7 @@ static JSValue slowJoin(ExecState& exec, JSObject* thisObject, JSString* separat
> // 9.e Increase k by 1..
> for (uint64_t k = 1; k < length; ++k) {
> // b. Let element be ? Get(O, ! ToString(k)).
>- JSValue element = thisObject->get(&exec, Identifier::fromString(&exec, AtomicString::number(k)));
>+ JSValue element = thisObject->get(&exec, Identifier::fromString(&exec, AtomString::number(k)));
> RETURN_IF_EXCEPTION(scope, { });
> 
> // c. If element is undefined or null, let next be the empty String; otherwise, let next be ? ToString(element).
>diff --git a/Source/JavaScriptCore/runtime/CachedTypes.cpp b/Source/JavaScriptCore/runtime/CachedTypes.cpp
>index 03cf164fbccc011e8c85f017772408b1c1154ebb..fb9510ef8a7c46526b95f093dc0b74f3a025f910 100644
>--- a/Source/JavaScriptCore/runtime/CachedTypes.cpp
>+++ b/Source/JavaScriptCore/runtime/CachedTypes.cpp
>@@ -43,7 +43,7 @@
> #include <wtf/FastMalloc.h>
> #include <wtf/Optional.h>
> #include <wtf/UUID.h>
>-#include <wtf/text/AtomicStringImpl.h>
>+#include <wtf/text/AtomStringImpl.h>
> 
> namespace JSC {
> 
>@@ -681,7 +681,7 @@ class CachedUniquedStringImplBase : public VariableLengthObject<T> {
> public:
> void encode(Encoder& encoder, const StringImpl& string)
> {
>- m_isAtomic = string.isAtomic();
>+ m_isAtomic = string.isAtom();
> m_isSymbol = string.isSymbol();
> RefPtr<StringImpl> impl = const_cast<StringImpl*>(&string);
> 
>@@ -717,7 +717,7 @@ public:
> {
> auto create = [&](const auto* buffer) -> UniquedStringImpl* {
> if (!m_isSymbol)
>- return AtomicStringImpl::add(buffer, m_length).leakRef();
>+ return AtomStringImpl::add(buffer, m_length).leakRef();
> 
> Identifier ident = Identifier::fromString(&decoder.vm(), buffer, m_length);
> String str = decoder.vm().propertyNames->lookUpPrivateName(ident);
>@@ -729,7 +729,7 @@ public:
> if (!m_length) {
> if (m_isSymbol)
> return &SymbolImpl::createNullSymbol().leakRef();
>- return AtomicStringImpl::add("").leakRef();
>+ return AtomStringImpl::add("").leakRef();
> }
> 
> if (m_is8Bit)
>diff --git a/Source/JavaScriptCore/runtime/CommonSlowPaths.cpp b/Source/JavaScriptCore/runtime/CommonSlowPaths.cpp
>index 29b2022338aac3e88f2a33e2b8937a5832ad90e2..48c7c1a8312f73095d53ee2132f8c3cad2108b9d 100644
>--- a/Source/JavaScriptCore/runtime/CommonSlowPaths.cpp
>+++ b/Source/JavaScriptCore/runtime/CommonSlowPaths.cpp
>@@ -1149,10 +1149,10 @@ SLOW_PATH_DECL(slow_path_get_by_val_with_this)
> if (LIKELY(baseValue.isCell() && subscript.isString())) {
> Structure& structure = *baseValue.asCell()->structure(vm);
> if (JSCell::canUseFastGetOwnProperty(structure)) {
>- RefPtr<AtomicStringImpl> existingAtomicString = asString(subscript)->toExistingAtomicString(exec);
>+ RefPtr<AtomStringImpl> existingAtomString = asString(subscript)->toExistingAtomString(exec);
> CHECK_EXCEPTION();
>- if (existingAtomicString) {
>- if (JSValue result = baseValue.asCell()->fastGetOwnProperty(vm, structure, existingAtomicString.get()))
>+ if (existingAtomString) {
>+ if (JSValue result = baseValue.asCell()->fastGetOwnProperty(vm, structure, existingAtomString.get()))
> RETURN_PROFILED(result);
> }
> }
>diff --git a/Source/JavaScriptCore/runtime/Completion.cpp b/Source/JavaScriptCore/runtime/Completion.cpp
>index 7e2aa303192861168332e0a22bbdc09d3f96fee0..dbff178de6b3e8e055e6598d0c255a829e35347b 100644
>--- a/Source/JavaScriptCore/runtime/Completion.cpp
>+++ b/Source/JavaScriptCore/runtime/Completion.cpp
>@@ -57,7 +57,7 @@ bool checkSyntax(ExecState* exec, const SourceCode& source, JSValue* returnedExc
> {
> VM& vm = exec->vm();
> JSLockHolder lock(vm);
>- RELEASE_ASSERT(vm.atomicStringTable() == Thread::current().atomicStringTable());
>+ RELEASE_ASSERT(vm.atomStringTable() == Thread::current().atomStringTable());
> 
> ParserError error;
> if (checkSyntaxInternal(vm, source, error))
>@@ -71,7 +71,7 @@ bool checkSyntax(ExecState* exec, const SourceCode& source, JSValue* returnedExc
> bool checkSyntax(VM& vm, const SourceCode& source, ParserError& error)
> {
> JSLockHolder lock(vm);
>- RELEASE_ASSERT(vm.atomicStringTable() == Thread::current().atomicStringTable());
>+ RELEASE_ASSERT(vm.atomStringTable() == Thread::current().atomStringTable());
> return checkSyntaxInternal(vm, source, error);
> }
> 
>@@ -79,7 +79,7 @@ bool checkModuleSyntax(ExecState* exec, const SourceCode& source, ParserError& e
> {
> VM& vm = exec->vm();
> JSLockHolder lock(vm);
>- RELEASE_ASSERT(vm.atomicStringTable() == Thread::current().atomicStringTable());
>+ RELEASE_ASSERT(vm.atomStringTable() == Thread::current().atomStringTable());
> std::unique_ptr<ModuleProgramNode> moduleProgramNode = parse<ModuleProgramNode>(
> &vm, source, Identifier(), JSParserBuiltinMode::NotBuiltin,
> JSParserStrictMode::Strict, JSParserScriptMode::Module, SourceParseMode::ModuleAnalyzeMode, SuperBinding::NotNeeded, error);
>@@ -95,7 +95,7 @@ bool checkModuleSyntax(ExecState* exec, const SourceCode& source, ParserError& e
> RefPtr<CachedBytecode> generateProgramBytecode(VM& vm, const SourceCode& source, int fd, BytecodeCacheError& error)
> {
> JSLockHolder lock(vm);
>- RELEASE_ASSERT(vm.atomicStringTable() == Thread::current().atomicStringTable());
>+ RELEASE_ASSERT(vm.atomStringTable() == Thread::current().atomStringTable());
> 
> VariableEnvironment variablesUnderTDZ;
> JSParserStrictMode strictMode = JSParserStrictMode::NotStrict;
>@@ -115,7 +115,7 @@ RefPtr<CachedBytecode> generateProgramBytecode(VM& vm, const SourceCode& source,
> RefPtr<CachedBytecode> generateModuleBytecode(VM& vm, const SourceCode& source, int fd, BytecodeCacheError& error)
> {
> JSLockHolder lock(vm);
>- RELEASE_ASSERT(vm.atomicStringTable() == Thread::current().atomicStringTable());
>+ RELEASE_ASSERT(vm.atomStringTable() == Thread::current().atomStringTable());
> 
> VariableEnvironment variablesUnderTDZ;
> JSParserStrictMode strictMode = JSParserStrictMode::Strict;
>@@ -136,7 +136,7 @@ JSValue evaluate(ExecState* exec, const SourceCode& source, JSValue thisValue, N
> VM& vm = exec->vm();
> JSLockHolder lock(vm);
> auto scope = DECLARE_CATCH_SCOPE(vm);
>- RELEASE_ASSERT(vm.atomicStringTable() == Thread::current().atomicStringTable());
>+ RELEASE_ASSERT(vm.atomStringTable() == Thread::current().atomStringTable());
> RELEASE_ASSERT(!vm.isCollectorBusyOnCurrentThread());
> 
> CodeProfiling profile(source);
>@@ -206,7 +206,7 @@ JSInternalPromise* loadAndEvaluateModule(ExecState* exec, Symbol* moduleId, JSVa
> {
> VM& vm = exec->vm();
> JSLockHolder lock(vm);
>- RELEASE_ASSERT(vm.atomicStringTable() == Thread::current().atomicStringTable());
>+ RELEASE_ASSERT(vm.atomStringTable() == Thread::current().atomStringTable());
> RELEASE_ASSERT(!vm.isCollectorBusyOnCurrentThread());
> 
> return vm.vmEntryGlobalObject(exec)->moduleLoader()->loadAndEvaluateModule(exec, moduleId, parameters, scriptFetcher);
>@@ -216,7 +216,7 @@ JSInternalPromise* loadAndEvaluateModule(ExecState* exec, const String& moduleNa
> {
> VM& vm = exec->vm();
> JSLockHolder lock(vm);
>- RELEASE_ASSERT(vm.atomicStringTable() == Thread::current().atomicStringTable());
>+ RELEASE_ASSERT(vm.atomStringTable() == Thread::current().atomStringTable());
> RELEASE_ASSERT(!vm.isCollectorBusyOnCurrentThread());
> 
> return vm.vmEntryGlobalObject(exec)->moduleLoader()->loadAndEvaluateModule(exec, identifierToJSValue(vm, Identifier::fromString(exec, moduleName)), parameters, scriptFetcher);
>@@ -227,7 +227,7 @@ JSInternalPromise* loadAndEvaluateModule(ExecState* exec, const SourceCode& sour
> VM& vm = exec->vm();
> JSLockHolder lock(vm);
> auto scope = DECLARE_THROW_SCOPE(vm);
>- RELEASE_ASSERT(vm.atomicStringTable() == Thread::current().atomicStringTable());
>+ RELEASE_ASSERT(vm.atomStringTable() == Thread::current().atomStringTable());
> RELEASE_ASSERT(!vm.isCollectorBusyOnCurrentThread());
> 
> Symbol* key = createSymbolForEntryPointModule(vm);
>@@ -245,7 +245,7 @@ JSInternalPromise* loadModule(ExecState* exec, const String& moduleName, JSValue
> {
> VM& vm = exec->vm();
> JSLockHolder lock(vm);
>- RELEASE_ASSERT(vm.atomicStringTable() == Thread::current().atomicStringTable());
>+ RELEASE_ASSERT(vm.atomStringTable() == Thread::current().atomStringTable());
> RELEASE_ASSERT(!vm.isCollectorBusyOnCurrentThread());
> 
> return vm.vmEntryGlobalObject(exec)->moduleLoader()->loadModule(exec, identifierToJSValue(vm, Identifier::fromString(exec, moduleName)), parameters, scriptFetcher);
>@@ -256,7 +256,7 @@ JSInternalPromise* loadModule(ExecState* exec, const SourceCode& source, JSValue
> VM& vm = exec->vm();
> JSLockHolder lock(vm);
> auto scope = DECLARE_THROW_SCOPE(vm);
>- RELEASE_ASSERT(vm.atomicStringTable() == Thread::current().atomicStringTable());
>+ RELEASE_ASSERT(vm.atomStringTable() == Thread::current().atomStringTable());
> RELEASE_ASSERT(!vm.isCollectorBusyOnCurrentThread());
> 
> Symbol* key = createSymbolForEntryPointModule(vm);
>@@ -275,7 +275,7 @@ JSValue linkAndEvaluateModule(ExecState* exec, const Identifier& moduleKey, JSVa
> {
> VM& vm = exec->vm();
> JSLockHolder lock(vm);
>- RELEASE_ASSERT(vm.atomicStringTable() == Thread::current().atomicStringTable());
>+ RELEASE_ASSERT(vm.atomStringTable() == Thread::current().atomStringTable());
> RELEASE_ASSERT(!vm.isCollectorBusyOnCurrentThread());
> 
> JSGlobalObject* globalObject = vm.vmEntryGlobalObject(exec);
>@@ -286,7 +286,7 @@ JSInternalPromise* importModule(ExecState* exec, const Identifier& moduleKey, JS
> {
> VM& vm = exec->vm();
> JSLockHolder lock(vm);
>- RELEASE_ASSERT(vm.atomicStringTable() == Thread::current().atomicStringTable());
>+ RELEASE_ASSERT(vm.atomStringTable() == Thread::current().atomStringTable());
> RELEASE_ASSERT(!vm.isCollectorBusyOnCurrentThread());
> 
> return vm.vmEntryGlobalObject(exec)->moduleLoader()->requestImportModule(exec, moduleKey, parameters, scriptFetcher);
>diff --git a/Source/JavaScriptCore/runtime/Identifier.cpp b/Source/JavaScriptCore/runtime/Identifier.cpp
>index 46f79c86ed6ec10db1a7437df317451f9e938ebb..d862873fabb7d4268f58730f4000733757f98da7 100644
>--- a/Source/JavaScriptCore/runtime/Identifier.cpp
>+++ b/Source/JavaScriptCore/runtime/Identifier.cpp
>@@ -42,7 +42,7 @@ Ref<StringImpl> Identifier::add(VM* vm, const char* c)
> if (!c[1])
> return vm->smallStrings.singleCharacterStringRep(c[0]);
> 
>- return *AtomicStringImpl::add(c);
>+ return *AtomStringImpl::add(c);
> }
> 
> Ref<StringImpl> Identifier::add(ExecState* exec, const char* c)
>@@ -61,7 +61,7 @@ Ref<StringImpl> Identifier::add8(VM* vm, const UChar* s, int length)
> if (!length)
> return *StringImpl::empty();
> 
>- return *AtomicStringImpl::add(s, length);
>+ return *AtomStringImpl::add(s, length);
> }
> 
> Identifier Identifier::from(ExecState* exec, unsigned value)
>@@ -109,24 +109,24 @@ void Identifier::dump(PrintStream& out) const
> 
> #ifndef NDEBUG
> 
>-void Identifier::checkCurrentAtomicStringTable(VM* vm)
>+void Identifier::checkCurrentAtomStringTable(VM* vm)
> {
> // Check the identifier table accessible through the threadspecific matches the
> // vm's identifier table.
>- ASSERT_UNUSED(vm, vm->atomicStringTable() == Thread::current().atomicStringTable());
>+ ASSERT_UNUSED(vm, vm->atomStringTable() == Thread::current().atomStringTable());
> }
> 
>-void Identifier::checkCurrentAtomicStringTable(ExecState* exec)
>+void Identifier::checkCurrentAtomStringTable(ExecState* exec)
> {
>- checkCurrentAtomicStringTable(&exec->vm());
>+ checkCurrentAtomStringTable(&exec->vm());
> }
> 
> #else
> 
> // These only exists so that our exports are the same for debug and release builds.
> // This would be an RELEASE_ASSERT_NOT_REACHED(), but we're in NDEBUG only code here!
>-NO_RETURN_DUE_TO_CRASH void Identifier::checkCurrentAtomicStringTable(VM*) { CRASH(); }
>-NO_RETURN_DUE_TO_CRASH void Identifier::checkCurrentAtomicStringTable(ExecState*) { CRASH(); }
>+NO_RETURN_DUE_TO_CRASH void Identifier::checkCurrentAtomStringTable(VM*) { CRASH(); }
>+NO_RETURN_DUE_TO_CRASH void Identifier::checkCurrentAtomStringTable(ExecState*) { CRASH(); }
> 
> #endif
> 
>diff --git a/Source/JavaScriptCore/runtime/Identifier.h b/Source/JavaScriptCore/runtime/Identifier.h
>index fa8d3421c41a2ed2c33100c22b4af6eb9ad1d316..104a147076b39c18d9ea05c50bddb14e16424b93 100644
>--- a/Source/JavaScriptCore/runtime/Identifier.h
>+++ b/Source/JavaScriptCore/runtime/Identifier.h
>@@ -88,7 +88,7 @@ class Identifier {
> public:
> Identifier() { }
> enum EmptyIdentifierFlag { EmptyIdentifier };
>- Identifier(EmptyIdentifierFlag) : m_string(StringImpl::empty()) { ASSERT(m_string.impl()->isAtomic()); }
>+ Identifier(EmptyIdentifierFlag) : m_string(StringImpl::empty()) { ASSERT(m_string.impl()->isAtom()); }
> 
> const String& string() const { return m_string; }
> UniquedStringImpl* impl() const { return static_cast<UniquedStringImpl*>(m_string.impl()); }
>@@ -117,8 +117,8 @@ public:
> static Identifier fromString(VM*, const LChar*, int length);
> static Identifier fromString(VM*, const UChar*, int length);
> static Identifier fromString(VM*, const String&);
>- static Identifier fromString(ExecState*, AtomicStringImpl*);
>- static Identifier fromString(ExecState*, const AtomicString&);
>+ static Identifier fromString(ExecState*, AtomStringImpl*);
>+ static Identifier fromString(ExecState*, const AtomString&);
> static Identifier fromString(ExecState*, const String&);
> static Identifier fromString(ExecState*, const char*);
> static Identifier fromString(VM* vm, const Vector<LChar>& characters) { return fromString(vm, characters.data(), characters.size()); }
>@@ -167,14 +167,14 @@ private:
> 
> // Only to be used with string literals.
> template<unsigned charactersCount>
>- Identifier(VM* vm, const char (&characters)[charactersCount]) : m_string(add(vm, characters)) { ASSERT(m_string.impl()->isAtomic()); }
>+ Identifier(VM* vm, const char (&characters)[charactersCount]) : m_string(add(vm, characters)) { ASSERT(m_string.impl()->isAtom()); }
> 
>- Identifier(VM* vm, const LChar* s, int length) : m_string(add(vm, s, length)) { ASSERT(m_string.impl()->isAtomic()); }
>- Identifier(VM* vm, const UChar* s, int length) : m_string(add(vm, s, length)) { ASSERT(m_string.impl()->isAtomic()); }
>- Identifier(ExecState*, AtomicStringImpl*);
>- Identifier(ExecState*, const AtomicString&);
>- Identifier(VM* vm, const String& string) : m_string(add(vm, string.impl())) { ASSERT(m_string.impl()->isAtomic()); }
>- Identifier(VM* vm, StringImpl* rep) : m_string(add(vm, rep)) { ASSERT(m_string.impl()->isAtomic()); }
>+ Identifier(VM* vm, const LChar* s, int length) : m_string(add(vm, s, length)) { ASSERT(m_string.impl()->isAtom()); }
>+ Identifier(VM* vm, const UChar* s, int length) : m_string(add(vm, s, length)) { ASSERT(m_string.impl()->isAtom()); }
>+ Identifier(ExecState*, AtomStringImpl*);
>+ Identifier(ExecState*, const AtomString&);
>+ Identifier(VM* vm, const String& string) : m_string(add(vm, string.impl())) { ASSERT(m_string.impl()->isAtom()); }
>+ Identifier(VM* vm, StringImpl* rep) : m_string(add(vm, rep)) { ASSERT(m_string.impl()->isAtom()); }
> 
> Identifier(SymbolImpl& uid)
> : m_string(&uid)
>@@ -195,11 +195,11 @@ private:
> static Ref<StringImpl> add(VM*, StringImpl*);
> 
> #ifndef NDEBUG
>- JS_EXPORT_PRIVATE static void checkCurrentAtomicStringTable(ExecState*);
>- JS_EXPORT_PRIVATE static void checkCurrentAtomicStringTable(VM*);
>+ JS_EXPORT_PRIVATE static void checkCurrentAtomStringTable(ExecState*);
>+ JS_EXPORT_PRIVATE static void checkCurrentAtomStringTable(VM*);
> #else
>- JS_EXPORT_PRIVATE NO_RETURN_DUE_TO_CRASH static void checkCurrentAtomicStringTable(ExecState*);
>- JS_EXPORT_PRIVATE NO_RETURN_DUE_TO_CRASH static void checkCurrentAtomicStringTable(VM*);
>+ JS_EXPORT_PRIVATE NO_RETURN_DUE_TO_CRASH static void checkCurrentAtomStringTable(ExecState*);
>+ JS_EXPORT_PRIVATE NO_RETURN_DUE_TO_CRASH static void checkCurrentAtomStringTable(VM*);
> #endif
> };
> 
>@@ -225,7 +225,7 @@ Ref<StringImpl> Identifier::add(VM* vm, const T* s, int length)
> if (!length)
> return *StringImpl::empty();
> 
>- return *AtomicStringImpl::add(s, length);
>+ return *AtomStringImpl::add(s, length);
> }
> 
> inline bool operator==(const Identifier& a, const Identifier& b)
>diff --git a/Source/JavaScriptCore/runtime/IdentifierInlines.h b/Source/JavaScriptCore/runtime/IdentifierInlines.h
>index 9964cc59c80861d9c2380ebab3e7e2cf1cf8ae09..45b7ec8c2b58b4fc6ccc59ca66809757bc497923 100644
>--- a/Source/JavaScriptCore/runtime/IdentifierInlines.h
>+++ b/Source/JavaScriptCore/runtime/IdentifierInlines.h
>@@ -31,25 +31,25 @@
> 
> namespace JSC {
> 
>-inline Identifier::Identifier(ExecState* exec, AtomicStringImpl* string)
>+inline Identifier::Identifier(ExecState* exec, AtomStringImpl* string)
> : m_string(string)
> {
> #ifndef NDEBUG
>- checkCurrentAtomicStringTable(exec);
>+ checkCurrentAtomStringTable(exec);
> if (string)
>- ASSERT_WITH_MESSAGE(!string->length() || string->isSymbol() || AtomicStringImpl::isInAtomicStringTable(string), "The atomic string comes from an other thread!");
>+ ASSERT_WITH_MESSAGE(!string->length() || string->isSymbol() || AtomStringImpl::isInAtomStringTable(string), "The atomic string comes from an other thread!");
> #else
> UNUSED_PARAM(exec);
> #endif
> }
> 
>-inline Identifier::Identifier(ExecState* exec, const AtomicString& string)
>+inline Identifier::Identifier(ExecState* exec, const AtomString& string)
> : m_string(string.string())
> {
> #ifndef NDEBUG
>- checkCurrentAtomicStringTable(exec);
>+ checkCurrentAtomStringTable(exec);
> if (!string.isNull())
>- ASSERT_WITH_MESSAGE(!string.length() || string.impl()->isSymbol() || AtomicStringImpl::isInAtomicStringTable(string.impl()), "The atomic string comes from an other thread!");
>+ ASSERT_WITH_MESSAGE(!string.length() || string.impl()->isSymbol() || AtomStringImpl::isInAtomStringTable(string.impl()), "The atomic string comes from an other thread!");
> #else
> UNUSED_PARAM(exec);
> #endif
>@@ -58,17 +58,17 @@ inline Identifier::Identifier(ExecState* exec, const AtomicString& string)
> inline Ref<StringImpl> Identifier::add(ExecState* exec, StringImpl* r)
> {
> #ifndef NDEBUG
>- checkCurrentAtomicStringTable(exec);
>+ checkCurrentAtomStringTable(exec);
> #endif
> VM& vm = exec->vm();
>- return *AtomicStringImpl::addWithStringTableProvider(vm, r);
>+ return *AtomStringImpl::addWithStringTableProvider(vm, r);
> }
> inline Ref<StringImpl> Identifier::add(VM* vm, StringImpl* r)
> {
> #ifndef NDEBUG
>- checkCurrentAtomicStringTable(vm);
>+ checkCurrentAtomStringTable(vm);
> #endif
>- return *AtomicStringImpl::addWithStringTableProvider(*vm, r);
>+ return *AtomStringImpl::addWithStringTableProvider(*vm, r);
> }
> 
> inline Identifier Identifier::fromUid(VM* vm, UniquedStringImpl* uid)
>@@ -125,19 +125,19 @@ inline Identifier Identifier::fromString(ExecState* exec, const String& string)
> return Identifier(&exec->vm(), string.impl());
> }
> 
>-inline Identifier Identifier::fromString(ExecState* exec, AtomicStringImpl* atomicString)
>+inline Identifier Identifier::fromString(ExecState* exec, AtomStringImpl* atomString)
> {
>- return Identifier(exec, atomicString);
>+ return Identifier(exec, atomString);
> }
> 
>-inline Identifier Identifier::fromString(ExecState* exec, const AtomicString& atomicString)
>+inline Identifier Identifier::fromString(ExecState* exec, const AtomString& atomString)
> {
>- return Identifier(exec, atomicString);
>+ return Identifier(exec, atomString);
> }
> 
> inline Identifier Identifier::fromString(ExecState* exec, const char* s)
> {
>- return Identifier(exec, AtomicString(s));
>+ return Identifier(exec, AtomString(s));
> }
> 
> inline JSValue identifierToJSValue(VM& vm, const Identifier& identifier)
>diff --git a/Source/JavaScriptCore/runtime/JSCJSValue.cpp b/Source/JavaScriptCore/runtime/JSCJSValue.cpp
>index d471e163f3ebea33dddccd223cc6df42445025b8..4e5e6a0aa62da14648e0913c6386f2c4f11932f5 100644
>--- a/Source/JavaScriptCore/runtime/JSCJSValue.cpp
>+++ b/Source/JavaScriptCore/runtime/JSCJSValue.cpp
>@@ -259,9 +259,9 @@ void JSValue::dumpInContextAssumingStructure(
> out.print(" (rope)");
> const StringImpl* impl = string->tryGetValueImpl();
> if (impl) {
>- if (impl->isAtomic())
>+ if (impl->isAtom())
> out.print(" (atomic)");
>- if (impl->isAtomic())
>+ if (impl->isAtom())
> out.print(" (identifier)");
> if (impl->isSymbol())
> out.print(" (symbol)");
>diff --git a/Source/JavaScriptCore/runtime/JSLock.cpp b/Source/JavaScriptCore/runtime/JSLock.cpp
>index 000969c474614cbee865d24ca1da6b5fba424686..7cc3f69d4afc2e7d52ebcb9739c81d297255c52c 100644
>--- a/Source/JavaScriptCore/runtime/JSLock.cpp
>+++ b/Source/JavaScriptCore/runtime/JSLock.cpp
>@@ -83,7 +83,7 @@ JSLock::JSLock(VM* vm)
> : m_lockCount(0)
> , m_lockDropDepth(0)
> , m_vm(vm)
>- , m_entryAtomicStringTable(nullptr)
>+ , m_entryAtomStringTable(nullptr)
> {
> }
> 
>@@ -130,9 +130,9 @@ void JSLock::didAcquireLock()
> return;
> 
> Thread& thread = Thread::current();
>- ASSERT(!m_entryAtomicStringTable);
>- m_entryAtomicStringTable = thread.setCurrentAtomicStringTable(m_vm->atomicStringTable());
>- ASSERT(m_entryAtomicStringTable);
>+ ASSERT(!m_entryAtomStringTable);
>+ m_entryAtomStringTable = thread.setCurrentAtomStringTable(m_vm->atomStringTable());
>+ ASSERT(m_entryAtomStringTable);
> 
> m_vm->setLastStackTop(thread.savedLastStackTop());
> ASSERT(thread.stack().contains(m_vm->lastStackTop()));
>@@ -212,9 +212,9 @@ void JSLock::willReleaseLock()
> vm->heap.releaseAccess();
> }
> 
>- if (m_entryAtomicStringTable) {
>- Thread::current().setCurrentAtomicStringTable(m_entryAtomicStringTable);
>- m_entryAtomicStringTable = nullptr;
>+ if (m_entryAtomStringTable) {
>+ Thread::current().setCurrentAtomStringTable(m_entryAtomStringTable);
>+ m_entryAtomStringTable = nullptr;
> }
> }
> 
>diff --git a/Source/JavaScriptCore/runtime/JSLock.h b/Source/JavaScriptCore/runtime/JSLock.h
>index 5277f02c8e112c21f0baa0feb7d4eb0ba053fd6d..f461f820f9e3aa5f1ec86a02113da2296f3330e8 100644
>--- a/Source/JavaScriptCore/runtime/JSLock.h
>+++ b/Source/JavaScriptCore/runtime/JSLock.h
>@@ -26,7 +26,7 @@
> #include <wtf/Noncopyable.h>
> #include <wtf/RefPtr.h>
> #include <wtf/Threading.h>
>-#include <wtf/text/AtomicStringTable.h>
>+#include <wtf/text/AtomStringTable.h>
> 
> namespace JSC {
> 
>@@ -140,7 +140,7 @@ private:
> unsigned m_lockDropDepth;
> bool m_shouldReleaseHeapAccess;
> VM* m_vm;
>- AtomicStringTable* m_entryAtomicStringTable; 
>+ AtomStringTable* m_entryAtomStringTable; 
> };
> 
> } // namespace
>diff --git a/Source/JavaScriptCore/runtime/JSString.cpp b/Source/JavaScriptCore/runtime/JSString.cpp
>index dcaead97ad054a708ca4a3ad985c015f9431c981..255738447a554348f241e34205050607c8e01f65 100644
>--- a/Source/JavaScriptCore/runtime/JSString.cpp
>+++ b/Source/JavaScriptCore/runtime/JSString.cpp
>@@ -211,7 +211,7 @@ void JSRopeString::resolveRopeInternal16NoSubstring(UChar* buffer) const
> ASSERT((buffer + length()) == position);
> }
> 
>-AtomicString JSRopeString::resolveRopeToAtomicString(ExecState* exec) const
>+AtomString JSRopeString::resolveRopeToAtomString(ExecState* exec) const
> {
> VM& vm = exec->vm();
> auto scope = DECLARE_THROW_SCOPE(vm);
>@@ -219,18 +219,18 @@ AtomicString JSRopeString::resolveRopeToAtomicString(ExecState* exec) const
> if (length() > maxLengthForOnStackResolve) {
> scope.release();
> return resolveRopeWithFunction(exec, [&] (Ref<StringImpl>&& newImpl) {
>- return AtomicStringImpl::add(newImpl.ptr());
>+ return AtomStringImpl::add(newImpl.ptr());
> });
> }
> 
> if (is8Bit()) {
> LChar buffer[maxLengthForOnStackResolve];
> resolveRopeInternal8(buffer);
>- convertToNonRope(AtomicStringImpl::add(buffer, length()));
>+ convertToNonRope(AtomStringImpl::add(buffer, length()));
> } else {
> UChar buffer[maxLengthForOnStackResolve];
> resolveRopeInternal16(buffer);
>- convertToNonRope(AtomicStringImpl::add(buffer, length()));
>+ convertToNonRope(AtomStringImpl::add(buffer, length()));
> }
> 
> // If we resolved a string that didn't previously exist, notify the heap that we've grown.
>@@ -251,36 +251,36 @@ inline void JSRopeString::convertToNonRope(String&& string) const
> ASSERT(!JSString::isRope());
> }
> 
>-RefPtr<AtomicStringImpl> JSRopeString::resolveRopeToExistingAtomicString(ExecState* exec) const
>+RefPtr<AtomStringImpl> JSRopeString::resolveRopeToExistingAtomString(ExecState* exec) const
> {
> VM& vm = exec->vm();
> auto scope = DECLARE_THROW_SCOPE(vm);
> 
> if (length() > maxLengthForOnStackResolve) {
>- RefPtr<AtomicStringImpl> existingAtomicString;
>+ RefPtr<AtomStringImpl> existingAtomString;
> resolveRopeWithFunction(exec, [&] (Ref<StringImpl>&& newImpl) -> Ref<StringImpl> {
>- existingAtomicString = AtomicStringImpl::lookUp(newImpl.ptr());
>- if (existingAtomicString)
>- return makeRef(*existingAtomicString);
>+ existingAtomString = AtomStringImpl::lookUp(newImpl.ptr());
>+ if (existingAtomString)
>+ return makeRef(*existingAtomString);
> return WTFMove(newImpl);
> });
> RETURN_IF_EXCEPTION(scope, nullptr);
>- return existingAtomicString;
>+ return existingAtomString;
> }
> 
> if (is8Bit()) {
> LChar buffer[maxLengthForOnStackResolve];
> resolveRopeInternal8(buffer);
>- if (RefPtr<AtomicStringImpl> existingAtomicString = AtomicStringImpl::lookUp(buffer, length())) {
>- convertToNonRope(*existingAtomicString);
>- return existingAtomicString;
>+ if (RefPtr<AtomStringImpl> existingAtomString = AtomStringImpl::lookUp(buffer, length())) {
>+ convertToNonRope(*existingAtomString);
>+ return existingAtomString;
> }
> } else {
> UChar buffer[maxLengthForOnStackResolve];
> resolveRopeInternal16(buffer);
>- if (RefPtr<AtomicStringImpl> existingAtomicString = AtomicStringImpl::lookUp(buffer, length())) {
>- convertToNonRope(*existingAtomicString);
>- return existingAtomicString;
>+ if (RefPtr<AtomStringImpl> existingAtomString = AtomStringImpl::lookUp(buffer, length())) {
>+ convertToNonRope(*existingAtomString);
>+ return existingAtomString;
> }
> }
> 
>diff --git a/Source/JavaScriptCore/runtime/JSString.h b/Source/JavaScriptCore/runtime/JSString.h
>index b893e0407828fb00abc0ba575c570e2bbfbd9988..6b5c6effca0b4b7931b5e789908f5314531c6548 100644
>--- a/Source/JavaScriptCore/runtime/JSString.h
>+++ b/Source/JavaScriptCore/runtime/JSString.h
>@@ -182,8 +182,8 @@ public:
> ~JSString();
> 
> Identifier toIdentifier(ExecState*) const;
>- AtomicString toAtomicString(ExecState*) const;
>- RefPtr<AtomicStringImpl> toExistingAtomicString(ExecState*) const;
>+ AtomString toAtomString(ExecState*) const;
>+ RefPtr<AtomStringImpl> toExistingAtomString(ExecState*) const;
> 
> StringViewWithUnderlyingString viewWithUnderlyingString(ExecState*) const;
> 
>@@ -576,8 +576,8 @@ private:
> // The rope value will remain a null string in that case.
> JS_EXPORT_PRIVATE const String& resolveRope(ExecState* nullOrExecForOOM) const;
> template<typename Function> const String& resolveRopeWithFunction(ExecState* nullOrExecForOOM, Function&&) const;
>- JS_EXPORT_PRIVATE AtomicString resolveRopeToAtomicString(ExecState*) const;
>- JS_EXPORT_PRIVATE RefPtr<AtomicStringImpl> resolveRopeToExistingAtomicString(ExecState*) const;
>+ JS_EXPORT_PRIVATE AtomString resolveRopeToAtomString(ExecState*) const;
>+ JS_EXPORT_PRIVATE RefPtr<AtomStringImpl> resolveRopeToExistingAtomString(ExecState*) const;
> void resolveRopeSlowCase8(LChar*) const;
> void resolveRopeSlowCase(UChar*) const;
> void outOfMemory(ExecState* nullOrExecForOOM) const;
>@@ -735,27 +735,27 @@ inline JSString* jsNontrivialString(VM* vm, String&& s)
> 
> ALWAYS_INLINE Identifier JSString::toIdentifier(ExecState* exec) const
> {
>- return Identifier::fromString(exec, toAtomicString(exec));
>+ return Identifier::fromString(exec, toAtomString(exec));
> }
> 
>-ALWAYS_INLINE AtomicString JSString::toAtomicString(ExecState* exec) const
>+ALWAYS_INLINE AtomString JSString::toAtomString(ExecState* exec) const
> {
> if (validateDFGDoesGC)
> RELEASE_ASSERT(vm()->heap.expectDoesGC());
> if (isRope())
>- return static_cast<const JSRopeString*>(this)->resolveRopeToAtomicString(exec);
>- return AtomicString(valueInternal());
>+ return static_cast<const JSRopeString*>(this)->resolveRopeToAtomString(exec);
>+ return AtomString(valueInternal());
> }
> 
>-ALWAYS_INLINE RefPtr<AtomicStringImpl> JSString::toExistingAtomicString(ExecState* exec) const
>+ALWAYS_INLINE RefPtr<AtomStringImpl> JSString::toExistingAtomString(ExecState* exec) const
> {
> if (validateDFGDoesGC)
> RELEASE_ASSERT(vm()->heap.expectDoesGC());
> if (isRope())
>- return static_cast<const JSRopeString*>(this)->resolveRopeToExistingAtomicString(exec);
>- if (valueInternal().impl()->isAtomic())
>- return static_cast<AtomicStringImpl*>(valueInternal().impl());
>- return AtomicStringImpl::lookUp(valueInternal().impl());
>+ return static_cast<const JSRopeString*>(this)->resolveRopeToExistingAtomString(exec);
>+ if (valueInternal().impl()->isAtom())
>+ return static_cast<AtomStringImpl*>(valueInternal().impl());
>+ return AtomStringImpl::lookUp(valueInternal().impl());
> }
> 
> inline const String& JSString::value(ExecState* exec) const
>diff --git a/Source/JavaScriptCore/runtime/PropertyMapHashTable.h b/Source/JavaScriptCore/runtime/PropertyMapHashTable.h
>index 70e9a71d0ddb064cc255b4e3e22a90abdeaf3828..5f078d2a509d2b44200f7a4af3881246cb2d58a7 100644
>--- a/Source/JavaScriptCore/runtime/PropertyMapHashTable.h
>+++ b/Source/JavaScriptCore/runtime/PropertyMapHashTable.h
>@@ -27,7 +27,7 @@
> #include <wtf/HashTable.h>
> #include <wtf/MathExtras.h>
> #include <wtf/Vector.h>
>-#include <wtf/text/AtomicStringImpl.h>
>+#include <wtf/text/AtomStringImpl.h>
> 
> 
> #define DUMP_PROPERTYMAP_STATS 0
>@@ -288,7 +288,7 @@ inline PropertyTable::const_iterator PropertyTable::end() const
> inline PropertyTable::find_iterator PropertyTable::find(const KeyType& key)
> {
> ASSERT(key);
>- ASSERT(key->isAtomic() || key->isSymbol());
>+ ASSERT(key->isAtom() || key->isSymbol());
> unsigned hash = IdentifierRepHash::hash(key);
> 
> #if DUMP_PROPERTYMAP_STATS
>@@ -318,7 +318,7 @@ inline PropertyTable::find_iterator PropertyTable::find(const KeyType& key)
> inline PropertyTable::ValueType* PropertyTable::get(const KeyType& key)
> {
> ASSERT(key);
>- ASSERT(key->isAtomic() || key->isSymbol());
>+ ASSERT(key->isAtom() || key->isSymbol());
> 
> if (!m_keyCount)
> return nullptr;
>diff --git a/Source/JavaScriptCore/runtime/PropertyName.h b/Source/JavaScriptCore/runtime/PropertyName.h
>index e90551bcd1b73e5f4e864613a11bf516d921dbad..feb52e6cf0a882c190f5f98e5ecc91fe36aa85b5 100644
>--- a/Source/JavaScriptCore/runtime/PropertyName.h
>+++ b/Source/JavaScriptCore/runtime/PropertyName.h
>@@ -69,9 +69,9 @@ public:
> return m_impl;
> }
> 
>- AtomicStringImpl* publicName() const
>+ AtomStringImpl* publicName() const
> {
>- return (!m_impl || m_impl->isSymbol()) ? nullptr : static_cast<AtomicStringImpl*>(m_impl);
>+ return (!m_impl || m_impl->isSymbol()) ? nullptr : static_cast<AtomStringImpl*>(m_impl);
> }
> 
> void dump(PrintStream& out) const
>diff --git a/Source/JavaScriptCore/runtime/SmallStrings.cpp b/Source/JavaScriptCore/runtime/SmallStrings.cpp
>index 0b5404f6e52e58d8167f63caf6aebf7b36cdb4de..bfcd0b96bf8ad0a4eee01eefd7651849b0645405 100644
>--- a/Source/JavaScriptCore/runtime/SmallStrings.cpp
>+++ b/Source/JavaScriptCore/runtime/SmallStrings.cpp
>@@ -51,7 +51,7 @@ void SmallStrings::initializeCommonStrings(VM& vm)
> for (unsigned i = 0; i < singleCharacterStringCount; ++i) {
> ASSERT(!m_singleCharacterStrings[i]);
> const LChar string[] = { static_cast<LChar>(i) };
>- m_singleCharacterStrings[i] = JSString::createHasOtherOwner(vm, AtomicStringImpl::add(string, 1).releaseNonNull());
>+ m_singleCharacterStrings[i] = JSString::createHasOtherOwner(vm, AtomStringImpl::add(string, 1).releaseNonNull());
> ASSERT(m_needsToBeVisited);
> }
> 
>@@ -88,12 +88,12 @@ Ref<StringImpl> SmallStrings::singleCharacterStringRep(unsigned char character)
> if (LIKELY(m_isInitialized))
> return *const_cast<StringImpl*>(m_singleCharacterStrings[character]->tryGetValueImpl());
> const LChar string[] = { static_cast<LChar>(character) };
>- return AtomicStringImpl::add(string, 1).releaseNonNull();
>+ return AtomStringImpl::add(string, 1).releaseNonNull();
> }
> 
> void SmallStrings::initialize(VM* vm, JSString*& string, const char* value)
> {
>- string = JSString::create(*vm, AtomicStringImpl::add(value).releaseNonNull());
>+ string = JSString::create(*vm, AtomStringImpl::add(value).releaseNonNull());
> ASSERT(m_needsToBeVisited);
> }
> 
>diff --git a/Source/JavaScriptCore/runtime/VM.cpp b/Source/JavaScriptCore/runtime/VM.cpp
>index 2861a12dc2ee398c5232f99fbb9c2e9860d4fbac..b1e3ff3954341ee4f114698660b9837f3090bcc9 100644
>--- a/Source/JavaScriptCore/runtime/VM.cpp
>+++ b/Source/JavaScriptCore/runtime/VM.cpp
>@@ -155,7 +155,7 @@
> #include <wtf/SimpleStats.h>
> #include <wtf/StringPrintStream.h>
> #include <wtf/Threading.h>
>-#include <wtf/text/AtomicStringTable.h>
>+#include <wtf/text/AtomStringTable.h>
> #include <wtf/text/SymbolRegistry.h>
> 
> #if ENABLE(C_LOOP)
>@@ -292,7 +292,7 @@ VM::VM(VMType vmType, HeapType heapType)
> , topEntryFrame(nullptr)
> , topCallFrame(CallFrame::noCaller())
> , promiseDeferredTimer(std::make_unique<PromiseDeferredTimer>(*this))
>- , m_atomicStringTable(vmType == Default ? Thread::current().atomicStringTable() : new AtomicStringTable)
>+ , m_atomStringTable(vmType == Default ? Thread::current().atomStringTable() : new AtomStringTable)
> , propertyNames(nullptr)
> , emptyList(new ArgList)
> , machineCodeBytesPerBytecodeWordForBaselineJIT(std::make_unique<SimpleStats>())
>@@ -329,7 +329,7 @@ VM::VM(VMType vmType, HeapType heapType)
> 
> // Need to be careful to keep everything consistent here
> JSLockHolder lock(this);
>- AtomicStringTable* existingEntryAtomicStringTable = Thread::current().setCurrentAtomicStringTable(m_atomicStringTable);
>+ AtomStringTable* existingEntryAtomStringTable = Thread::current().setCurrentAtomStringTable(m_atomStringTable);
> structureStructure.set(*this, Structure::createStructure(*this));
> structureRareDataStructure.set(*this, StructureRareData::createStructure(*this, 0, jsNull()));
> stringStructure.set(*this, JSString::createStructure(*this, 0, jsNull()));
>@@ -393,7 +393,7 @@ VM::VM(VMType vmType, HeapType heapType)
> sentinelSetBucket();
> }
> 
>- Thread::current().setCurrentAtomicStringTable(existingEntryAtomicStringTable);
>+ Thread::current().setCurrentAtomStringTable(existingEntryAtomStringTable);
> 
> #if !ENABLE(C_LOOP)
> initializeHostCallReturnValue(); // This is needed to convince the linker not to drop host call return support.
>@@ -541,7 +541,7 @@ VM::~VM()
> 
> delete propertyNames;
> if (vmType != Default)
>- delete m_atomicStringTable;
>+ delete m_atomStringTable;
> 
> delete clientData;
> delete m_regExpCache;
>diff --git a/Source/JavaScriptCore/runtime/VM.h b/Source/JavaScriptCore/runtime/VM.h
>index eee155c4b297d9229dbaf3fdcc9ab27d9fb0a8a2..566e013f3bb55bac3a41b83bd5e3abf177d366a8 100644
>--- a/Source/JavaScriptCore/runtime/VM.h
>+++ b/Source/JavaScriptCore/runtime/VM.h
>@@ -554,7 +554,7 @@ public:
> JSCell* currentlyDestructingCallbackObject;
> const ClassInfo* currentlyDestructingCallbackObjectClassInfo { nullptr };
> 
>- AtomicStringTable* m_atomicStringTable;
>+ AtomStringTable* m_atomStringTable;
> WTF::SymbolRegistry m_symbolRegistry;
> CommonIdentifiers* propertyNames;
> const ArgList* emptyList;
>@@ -566,7 +566,7 @@ public:
> WeakGCMap<StringImpl*, JSString, PtrHash<StringImpl*>> stringCache;
> Strong<JSString> lastCachedString;
> 
>- AtomicStringTable* atomicStringTable() const { return m_atomicStringTable; }
>+ AtomStringTable* atomStringTable() const { return m_atomStringTable; }
> WTF::SymbolRegistry& symbolRegistry() { return m_symbolRegistry; }
> 
> Structure* setIteratorStructure()
>@@ -866,7 +866,7 @@ public:
> WatchpointSet* ensureWatchpointSetForImpureProperty(const Identifier&);
> void registerWatchpointForImpureProperty(const Identifier&, Watchpoint*);
> 
>- // FIXME: Use AtomicString once it got merged with Identifier.
>+ // FIXME: Use AtomString once it got merged with Identifier.
> JS_EXPORT_PRIVATE void addImpureProperty(const String&);
> 
> InlineWatchpointSet& primitiveGigacageEnabled() { return m_primitiveGigacageEnabled; }
>diff --git a/Source/JavaScriptCore/wasm/js/JSWebAssemblyModule.cpp b/Source/JavaScriptCore/wasm/js/JSWebAssemblyModule.cpp
>index 71909084a3c8f5b468d7820f74b1ffbfd2472a5b..3abbcf5847f94385eda8e50e8b26f229521eaaa7 100644
>--- a/Source/JavaScriptCore/wasm/js/JSWebAssemblyModule.cpp
>+++ b/Source/JavaScriptCore/wasm/js/JSWebAssemblyModule.cpp
>@@ -82,7 +82,7 @@ void JSWebAssemblyModule::finishCreation(VM& vm)
> for (auto& exp : moduleInformation.exports) {
> auto offset = exportSymbolTable->takeNextScopeOffset(NoLockingNecessary);
> String field = String::fromUTF8(exp.field);
>- exportSymbolTable->set(NoLockingNecessary, AtomicString(field).impl(), SymbolTableEntry(VarOffset(offset)));
>+ exportSymbolTable->set(NoLockingNecessary, AtomString(field).impl(), SymbolTableEntry(VarOffset(offset)));
> }
> 
> m_exportSymbolTable.set(vm, this, exportSymbolTable);
>diff --git a/Source/WTF/WTF.xcodeproj/project.pbxproj b/Source/WTF/WTF.xcodeproj/project.pbxproj
>index 26344ac725ac93d02eab93c44e5ecf3e3dafc8dd..077afbfb1dd4c96c0a8e9e8795148d981ffc00dd 100644
>--- a/Source/WTF/WTF.xcodeproj/project.pbxproj
>+++ b/Source/WTF/WTF.xcodeproj/project.pbxproj
>@@ -79,7 +79,7 @@
> 		5CC0EE8A2162BC2200A1A842 /* NSURLExtras.mm in Sources */ = {isa = PBXBuildFile; fileRef = 5CC0EE882162BC2200A1A842 /* NSURLExtras.mm */; };
> 		5FAD3AE221B9636600BEE178 /* URLHelpers.cpp in Sources */ = {isa = PBXBuildFile; fileRef = 5FAD3AE121B9636600BEE178 /* URLHelpers.cpp */; };
> 		70A993FE1AD7151300FA615B /* SymbolRegistry.cpp in Sources */ = {isa = PBXBuildFile; fileRef = 70A993FC1AD7151300FA615B /* SymbolRegistry.cpp */; };
>-		70ECA60D1B02426800449739 /* AtomicStringImpl.cpp in Sources */ = {isa = PBXBuildFile; fileRef = 70ECA60A1B02426800449739 /* AtomicStringImpl.cpp */; };
>+		70ECA60D1B02426800449739 /* AtomStringImpl.cpp in Sources */ = {isa = PBXBuildFile; fileRef = 70ECA60A1B02426800449739 /* AtomStringImpl.cpp */; };
> 		7A05093F1FB9DCC500B33FB8 /* JSONValues.cpp in Sources */ = {isa = PBXBuildFile; fileRef = 7A05093E1FB9DCC500B33FB8 /* JSONValues.cpp */; };
> 		7A6EBA3420746C34004F9C44 /* MachSendRight.cpp in Sources */ = {isa = PBXBuildFile; fileRef = 7A6EBA3320746C34004F9C44 /* MachSendRight.cpp */; };
> 		7AF023B52061E17000A8EFD6 /* ProcessPrivilege.cpp in Sources */ = {isa = PBXBuildFile; fileRef = 7AF023B42061E16F00A8EFD6 /* ProcessPrivilege.cpp */; };
>@@ -91,7 +91,7 @@
> 		93B5B44E2213D616004B7AA7 /* HexNumber.cpp in Sources */ = {isa = PBXBuildFile; fileRef = 93B5B44D2213D616004B7AA7 /* HexNumber.cpp */; };
> 		93B5B45122171EEA004B7AA7 /* Logger.cpp in Sources */ = {isa = PBXBuildFile; fileRef = 93B5B45022171EE9004B7AA7 /* Logger.cpp */; };
> 		93F1993E19D7958D00C2390B /* StringView.cpp in Sources */ = {isa = PBXBuildFile; fileRef = 93F1993D19D7958D00C2390B /* StringView.cpp */; };
>-		9BC70F05176C379D00101DEC /* AtomicStringTable.cpp in Sources */ = {isa = PBXBuildFile; fileRef = 9BC70F04176C379D00101DEC /* AtomicStringTable.cpp */; };
>+		9BC70F05176C379D00101DEC /* AtomStringTable.cpp in Sources */ = {isa = PBXBuildFile; fileRef = 9BC70F04176C379D00101DEC /* AtomStringTable.cpp */; };
> 		A32D8FA521FFFAB400780662 /* ThreadingPOSIX.cpp in Sources */ = {isa = PBXBuildFile; fileRef = A32D8FA421FFFAB400780662 /* ThreadingPOSIX.cpp */; };
> 		A331D95B21F24992009F02AA /* FileSystem.cpp in Sources */ = {isa = PBXBuildFile; fileRef = A331D95A21F24992009F02AA /* FileSystem.cpp */; };
> 		A331D95D21F249E4009F02AA /* FileSystemCF.cpp in Sources */ = {isa = PBXBuildFile; fileRef = A331D95C21F249E4009F02AA /* FileSystemCF.cpp */; };
>@@ -106,7 +106,7 @@
> 		A3EE5C4021FFACA200FABD61 /* SchedulePairMac.mm in Sources */ = {isa = PBXBuildFile; fileRef = A3EE5C3F21FFACA200FABD61 /* SchedulePairMac.mm */; };
> 		A5BA15F3182433A900A82E69 /* StringCocoa.mm in Sources */ = {isa = PBXBuildFile; fileRef = A5BA15F2182433A900A82E69 /* StringCocoa.mm */; };
> 		A5BA15F51824348000A82E69 /* StringImplCocoa.mm in Sources */ = {isa = PBXBuildFile; fileRef = A5BA15F41824348000A82E69 /* StringImplCocoa.mm */; };
>-		A5BA15FA182435A600A82E69 /* AtomicStringImplCF.cpp in Sources */ = {isa = PBXBuildFile; fileRef = A5BA15F7182435A600A82E69 /* AtomicStringImplCF.cpp */; };
>+		A5BA15FA182435A600A82E69 /* AtomStringImplCF.cpp in Sources */ = {isa = PBXBuildFile; fileRef = A5BA15F7182435A600A82E69 /* AtomStringImplCF.cpp */; };
> 		A5BA15FB182435A600A82E69 /* StringCF.cpp in Sources */ = {isa = PBXBuildFile; fileRef = A5BA15F8182435A600A82E69 /* StringCF.cpp */; };
> 		A5BA15FC182435A600A82E69 /* StringImplCF.cpp in Sources */ = {isa = PBXBuildFile; fileRef = A5BA15F9182435A600A82E69 /* StringImplCF.cpp */; };
> 		A748745217A0BDAE00FA04CB /* SixCharacterHash.cpp in Sources */ = {isa = PBXBuildFile; fileRef = A748744F17A0BDAE00FA04CB /* SixCharacterHash.cpp */; };
>@@ -139,7 +139,7 @@
> 		A8A47421151A825B004123FF /* SHA1.cpp in Sources */ = {isa = PBXBuildFile; fileRef = A8A47308151A825B004123FF /* SHA1.cpp */; };
> 		A8A47425151A825B004123FF /* SizeLimits.cpp in Sources */ = {isa = PBXBuildFile; fileRef = A8A4730C151A825B004123FF /* SizeLimits.cpp */; };
> 		A8A47427151A825B004123FF /* StackBounds.cpp in Sources */ = {isa = PBXBuildFile; fileRef = A8A4730E151A825B004123FF /* StackBounds.cpp */; };
>-		A8A47435151A825B004123FF /* AtomicString.cpp in Sources */ = {isa = PBXBuildFile; fileRef = A8A4731D151A825B004123FF /* AtomicString.cpp */; };
>+		A8A47435151A825B004123FF /* AtomString.cpp in Sources */ = {isa = PBXBuildFile; fileRef = A8A4731D151A825B004123FF /* AtomString.cpp */; };
> 		A8A47439151A825B004123FF /* CString.cpp in Sources */ = {isa = PBXBuildFile; fileRef = A8A47321151A825B004123FF /* CString.cpp */; };
> 		A8A4743C151A825B004123FF /* StringBuilder.cpp in Sources */ = {isa = PBXBuildFile; fileRef = A8A47324151A825B004123FF /* StringBuilder.cpp */; };
> 		A8A47440151A825B004123FF /* StringImpl.cpp in Sources */ = {isa = PBXBuildFile; fileRef = A8A47328151A825B004123FF /* StringImpl.cpp */; };
>@@ -398,7 +398,7 @@
> 		6541CAF41630DB26006D0DEC /* CopyWTFHeaders.xcconfig */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = text.xcconfig; path = CopyWTFHeaders.xcconfig; sourceTree = "<group>"; };
> 		70A993FC1AD7151300FA615B /* SymbolRegistry.cpp */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.cpp.cpp; path = SymbolRegistry.cpp; sourceTree = "<group>"; };
> 		70A993FD1AD7151300FA615B /* SymbolRegistry.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = SymbolRegistry.h; sourceTree = "<group>"; };
>-		70ECA60A1B02426800449739 /* AtomicStringImpl.cpp */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.cpp.cpp; path = AtomicStringImpl.cpp; sourceTree = "<group>"; };
>+		70ECA60A1B02426800449739 /* AtomStringImpl.cpp */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.cpp.cpp; path = AtomStringImpl.cpp; sourceTree = "<group>"; };
> 		70ECA60B1B02426800449739 /* SymbolImpl.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = SymbolImpl.h; sourceTree = "<group>"; };
> 		70ECA60C1B02426800449739 /* UniquedStringImpl.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = UniquedStringImpl.h; sourceTree = "<group>"; };
> 		79038E05224B05A7004C0738 /* SpanningTree.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = SpanningTree.h; sourceTree = "<group>"; };
>@@ -446,8 +446,8 @@
> 		974CFC8D16A4F327006D5404 /* WeakPtr.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = WeakPtr.h; sourceTree = "<group>"; };
> 		996B17841EBA441C007E10EB /* DebugUtilities.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = DebugUtilities.h; sourceTree = "<group>"; };
> 		9B67F3F12228D5310030DE9C /* WeakHashSet.h */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.c.h; path = WeakHashSet.h; sourceTree = "<group>"; };
>-		9BC70F04176C379D00101DEC /* AtomicStringTable.cpp */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.cpp.cpp; path = AtomicStringTable.cpp; sourceTree = "<group>"; };
>-		9BD8F40A176C2AD80002D865 /* AtomicStringTable.h */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.c.h; path = AtomicStringTable.h; sourceTree = "<group>"; };
>+		9BC70F04176C379D00101DEC /* AtomStringTable.cpp */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.cpp.cpp; path = AtomStringTable.cpp; sourceTree = "<group>"; };
>+		9BD8F40A176C2AD80002D865 /* AtomStringTable.h */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.c.h; path = AtomStringTable.h; sourceTree = "<group>"; };
> 		9C67C542589348E285B49699 /* IndexedContainerIterator.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = IndexedContainerIterator.h; sourceTree = "<group>"; };
> 		A1B89B87221E000F00EB4CEA /* SDKVariant.xcconfig */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = text.xcconfig; path = SDKVariant.xcconfig; sourceTree = "<group>"; };
> 		A30D412C1F0DE0BA00B71954 /* SoftLinking.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = SoftLinking.h; sourceTree = "<group>"; };
>@@ -473,7 +473,7 @@
> 		A5098B011C16A4F900087797 /* SecuritySPI.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = SecuritySPI.h; sourceTree = "<group>"; };
> 		A5BA15F2182433A900A82E69 /* StringCocoa.mm */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.cpp.objcpp; path = StringCocoa.mm; sourceTree = "<group>"; };
> 		A5BA15F41824348000A82E69 /* StringImplCocoa.mm */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.cpp.objcpp; path = StringImplCocoa.mm; sourceTree = "<group>"; };
>-		A5BA15F7182435A600A82E69 /* AtomicStringImplCF.cpp */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.cpp.cpp; path = AtomicStringImplCF.cpp; sourceTree = "<group>"; };
>+		A5BA15F7182435A600A82E69 /* AtomStringImplCF.cpp */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.cpp.cpp; path = AtomStringImplCF.cpp; sourceTree = "<group>"; };
> 		A5BA15F8182435A600A82E69 /* StringCF.cpp */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.cpp.cpp; path = StringCF.cpp; sourceTree = "<group>"; };
> 		A5BA15F9182435A600A82E69 /* StringImplCF.cpp */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.cpp.cpp; path = StringImplCF.cpp; sourceTree = "<group>"; };
> 		A70DA0821799F04D00529A9B /* Insertion.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = Insertion.h; sourceTree = "<group>"; };
>@@ -589,10 +589,10 @@
> 		A8A47314151A825B004123FF /* Hasher.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = Hasher.h; sourceTree = "<group>"; };
> 		A8A4731A151A825B004123FF /* SetForScope.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = SetForScope.h; sourceTree = "<group>"; };
> 		A8A4731C151A825B004123FF /* ASCIIFastPath.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = ASCIIFastPath.h; sourceTree = "<group>"; };
>-		A8A4731D151A825B004123FF /* AtomicString.cpp */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.cpp.cpp; path = AtomicString.cpp; sourceTree = "<group>"; };
>-		A8A4731E151A825B004123FF /* AtomicString.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = AtomicString.h; sourceTree = "<group>"; };
>-		A8A4731F151A825B004123FF /* AtomicStringHash.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = AtomicStringHash.h; sourceTree = "<group>"; };
>-		A8A47320151A825B004123FF /* AtomicStringImpl.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = AtomicStringImpl.h; sourceTree = "<group>"; };
>+		A8A4731D151A825B004123FF /* AtomString.cpp */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.cpp.cpp; path = AtomString.cpp; sourceTree = "<group>"; };
>+		A8A4731E151A825B004123FF /* AtomString.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = AtomString.h; sourceTree = "<group>"; };
>+		A8A4731F151A825B004123FF /* AtomStringHash.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = AtomStringHash.h; sourceTree = "<group>"; };
>+		A8A47320151A825B004123FF /* AtomStringImpl.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = AtomStringImpl.h; sourceTree = "<group>"; };
> 		A8A47321151A825B004123FF /* CString.cpp */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.cpp.cpp; path = CString.cpp; sourceTree = "<group>"; };
> 		A8A47322151A825B004123FF /* CString.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = CString.h; sourceTree = "<group>"; };
> 		A8A47323151A825B004123FF /* StringBuffer.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = StringBuffer.h; sourceTree = "<group>"; };
>@@ -842,7 +842,7 @@
> 		A5BA15F61824359E00A82E69 /* cf */ = {
> 			isa = PBXGroup;
> 			children = (
>-				A5BA15F7182435A600A82E69 /* AtomicStringImplCF.cpp */,
>+				A5BA15F7182435A600A82E69 /* AtomStringImplCF.cpp */,
> 				A5BA15F8182435A600A82E69 /* StringCF.cpp */,
> 				A5BA15F9182435A600A82E69 /* StringImplCF.cpp */,
> 				93934BD418A1F16900D0D6A1 /* StringViewCF.cpp */,
>@@ -1268,13 +1268,13 @@
> 				A8A4731C151A825B004123FF /* ASCIIFastPath.h */,
> 				C6F050790D9C432A99085E75 /* ASCIILiteral.cpp */,
> 				382029E246C84B0099FD6764 /* ASCIILiteral.h */,
>-				A8A4731D151A825B004123FF /* AtomicString.cpp */,
>-				A8A4731E151A825B004123FF /* AtomicString.h */,
>-				A8A4731F151A825B004123FF /* AtomicStringHash.h */,
>-				70ECA60A1B02426800449739 /* AtomicStringImpl.cpp */,
>-				A8A47320151A825B004123FF /* AtomicStringImpl.h */,
>-				9BC70F04176C379D00101DEC /* AtomicStringTable.cpp */,
>-				9BD8F40A176C2AD80002D865 /* AtomicStringTable.h */,
>+				A8A4731D151A825B004123FF /* AtomString.cpp */,
>+				A8A4731E151A825B004123FF /* AtomString.h */,
>+				A8A4731F151A825B004123FF /* AtomStringHash.h */,
>+				70ECA60A1B02426800449739 /* AtomStringImpl.cpp */,
>+				A8A47320151A825B004123FF /* AtomStringImpl.h */,
>+				9BC70F04176C379D00101DEC /* AtomStringTable.cpp */,
>+				9BD8F40A176C2AD80002D865 /* AtomStringTable.h */,
> 				8134013615B092FD001FF0B8 /* Base64.cpp */,
> 				8134013715B092FD001FF0B8 /* Base64.h */,
> 				0F8F2B9B172F2594007DBDA5 /* ConversionMode.h */,
>@@ -1503,10 +1503,10 @@
> 				4427C5AA21F6D6C300A612A4 /* ASCIICType.cpp in Sources */,
> 				C805EF39E5F14481A96D39FC /* ASCIILiteral.cpp in Sources */,
> 				A8A47386151A825B004123FF /* Assertions.cpp in Sources */,
>-				A8A47435151A825B004123FF /* AtomicString.cpp in Sources */,
>-				70ECA60D1B02426800449739 /* AtomicStringImpl.cpp in Sources */,
>-				A5BA15FA182435A600A82E69 /* AtomicStringImplCF.cpp in Sources */,
>-				9BC70F05176C379D00101DEC /* AtomicStringTable.cpp in Sources */,
>+				A8A47435151A825B004123FF /* AtomString.cpp in Sources */,
>+				70ECA60D1B02426800449739 /* AtomStringImpl.cpp in Sources */,
>+				A5BA15FA182435A600A82E69 /* AtomStringImplCF.cpp in Sources */,
>+				9BC70F05176C379D00101DEC /* AtomStringTable.cpp in Sources */,
> 				1469419D16EAB10A0024E146 /* AutodrainedPool.cpp in Sources */,
> 				0F43D8F11DB5ADDC00108FB6 /* AutomaticThread.cpp in Sources */,
> 				8134013815B092FD001FF0B8 /* Base64.cpp in Sources */,
>diff --git a/Source/WTF/wtf/BloomFilter.h b/Source/WTF/wtf/BloomFilter.h
>index eda9210f25ec183a6d24817241bccab6ea9afc55..15d1fdd90e964292a3bd2f35760429c5d05c122a 100644
>--- a/Source/WTF/wtf/BloomFilter.h
>+++ b/Source/WTF/wtf/BloomFilter.h
>@@ -26,7 +26,7 @@
> #pragma once
> 
> #include <array>
>-#include <wtf/text/AtomicString.h>
>+#include <wtf/text/AtomString.h>
> 
> namespace WTF {
> 
>@@ -55,9 +55,9 @@ public:
> 
> void clear();
> 
>- void add(const AtomicString& string) { add(string.impl()->existingHash()); }
>+ void add(const AtomString& string) { add(string.impl()->existingHash()); }
> void add(const String& string) { add(string.impl()->hash()); }
>- bool mayContain(const AtomicString& string) const { return mayContain(string.impl()->existingHash()); }
>+ bool mayContain(const AtomString& string) const { return mayContain(string.impl()->existingHash()); }
> bool mayContain(const String& string) const { return mayContain(string.impl()->hash()); }
> 
> private:
>@@ -174,12 +174,12 @@ public:
> // Otherwise overflowed keys will stick around.
> void clear();
> 
>- void add(const AtomicString& string) { add(string.impl()->existingHash()); }
>+ void add(const AtomString& string) { add(string.impl()->existingHash()); }
> void add(const String& string) { add(string.impl()->hash()); }
>- void remove(const AtomicString& string) { remove(string.impl()->existingHash()); }
>+ void remove(const AtomString& string) { remove(string.impl()->existingHash()); }
> void remove(const String& string) { remove(string.impl()->hash()); }
> 
>- bool mayContain(const AtomicString& string) const { return mayContain(string.impl()->existingHash()); }
>+ bool mayContain(const AtomString& string) const { return mayContain(string.impl()->existingHash()); }
> bool mayContain(const String& string) const { return mayContain(string.impl()->hash()); }
> 
> #if !ASSERT_DISABLED
>diff --git a/Source/WTF/wtf/CMakeLists.txt b/Source/WTF/wtf/CMakeLists.txt
>index 975d87132a53444567ffeb4cb98786ae03874bbc..fe40fe0b37b72d8dbe8021fc8cd169e01a2b463d 100644
>--- a/Source/WTF/wtf/CMakeLists.txt
>+++ b/Source/WTF/wtf/CMakeLists.txt
>@@ -289,10 +289,10 @@ set(WTF_PUBLIC_HEADERS
> 
> text/ASCIIFastPath.h
> text/ASCIILiteral.h
>- text/AtomicString.h
>- text/AtomicStringHash.h
>- text/AtomicStringImpl.h
>- text/AtomicStringTable.h
>+ text/AtomString.h
>+ text/AtomStringHash.h
>+ text/AtomStringImpl.h
>+ text/AtomStringTable.h
> text/Base64.h
> text/CString.h
> text/ConversionMode.h
>@@ -430,9 +430,9 @@ set(WTF_SOURCES
> persistence/PersistentEncoder.cpp
> 
> text/ASCIILiteral.cpp
>- text/AtomicString.cpp
>- text/AtomicStringImpl.cpp
>- text/AtomicStringTable.cpp
>+ text/AtomString.cpp
>+ text/AtomStringImpl.cpp
>+ text/AtomStringTable.cpp
> text/Base64.cpp
> text/CString.cpp
> text/ExternalStringImpl.cpp
>diff --git a/Source/WTF/wtf/Forward.h b/Source/WTF/wtf/Forward.h
>index f6a0c0e5829951a21d69f4a65363600d336dd4b2..f60391259b65def7e96c91213f78853fe73b5150 100644
>--- a/Source/WTF/wtf/Forward.h
>+++ b/Source/WTF/wtf/Forward.h
>@@ -24,8 +24,8 @@
> 
> namespace WTF {
> 
>-class AtomicString;
>-class AtomicStringImpl;
>+class AtomString;
>+class AtomStringImpl;
> class BinarySemaphore;
> class CString;
> class CrashOnOverflow;
>@@ -87,8 +87,8 @@ template<class, class> class expected;
> template<class> class unexpected;
> }}} // namespace std::experimental::fundamentals_v3
> 
>-using WTF::AtomicString;
>-using WTF::AtomicStringImpl;
>+using WTF::AtomString;
>+using WTF::AtomStringImpl;
> using WTF::BinarySemaphore;
> using WTF::CString;
> using WTF::CompletionHandler;
>diff --git a/Source/WTF/wtf/Logger.h b/Source/WTF/wtf/Logger.h
>index 552f9b63bf7587089a1eed6e61b377c56820a85a..4f5e1a370ec902a9ce69ceef6c5ab03aa96d2761 100644
>--- a/Source/WTF/wtf/Logger.h
>+++ b/Source/WTF/wtf/Logger.h
>@@ -41,7 +41,7 @@ struct LogArgument {
> template<typename U = T> static typename std::enable_if<std::is_enum::value, String>::type toString(U argument) { return String::number(static_cast<typename std::underlying_type::type>(argument)); }
> template<typename U = T> static typename std::enable_if<std::is_same<U, float>::value, String>::type toString(float argument) { return String::numberToStringFixedPrecision(argument); }
> template<typename U = T> static typename std::enable_if<std::is_same<U, double>::value, String>::type toString(double argument) { return String::numberToStringFixedPrecision(argument); }
>- template<typename U = T> static typename std::enable_if<std::is_same<typename std::remove_reference::type, AtomicString>::value, String>::type toString(const AtomicString& argument) { return argument.string(); }
>+ template<typename U = T> static typename std::enable_if<std::is_same<typename std::remove_reference::type, AtomString>::value, String>::type toString(const AtomString& argument) { return argument.string(); }
> template<typename U = T> static typename std::enable_if<std::is_same<typename std::remove_reference::type, String>::value, String>::type toString(String argument) { return argument; }
> template<typename U = T> static typename std::enable_if<std::is_same<typename std::remove_reference::type, StringBuilder*>::value, String>::type toString(StringBuilder* argument) { return argument->toString(); }
> template<typename U = T> static typename std::enable_if<std::is_same<U, const char*>::value, String>::type toString(const char* argument) { return String(argument); }
>diff --git a/Source/WTF/wtf/PlatformMac.cmake b/Source/WTF/wtf/PlatformMac.cmake
>index e09053bbc41997c58081705ee0a10b44a734c19e..797c5cfe7a5bebe7da2dc8dd9068ddab32c27d53 100644
>--- a/Source/WTF/wtf/PlatformMac.cmake
>+++ b/Source/WTF/wtf/PlatformMac.cmake
>@@ -69,7 +69,7 @@ list(APPEND WTF_SOURCES
> posix/OSAllocatorPOSIX.cpp
> posix/ThreadingPOSIX.cpp
> 
>- text/cf/AtomicStringImplCF.cpp
>+ text/cf/AtomStringImplCF.cpp
> text/cf/StringCF.cpp
> text/cf/StringImplCF.cpp
> text/cf/StringViewCF.cpp
>diff --git a/Source/WTF/wtf/PlatformWin.cmake b/Source/WTF/wtf/PlatformWin.cmake
>index c5979d83a4329e120ee0cbd079269e300e6a09ce..9f533faaba75c470b32119e5350de9f07944e4f4 100644
>--- a/Source/WTF/wtf/PlatformWin.cmake
>+++ b/Source/WTF/wtf/PlatformWin.cmake
>@@ -44,7 +44,7 @@ if (USE_CF)
> cf/FileSystemCF.cpp
> cf/URLCF.cpp
> 
>- text/cf/AtomicStringImplCF.cpp
>+ text/cf/AtomStringImplCF.cpp
> text/cf/StringCF.cpp
> text/cf/StringImplCF.cpp
> text/cf/StringViewCF.cpp
>diff --git a/Source/WTF/wtf/PrintStream.h b/Source/WTF/wtf/PrintStream.h
>index 5c9fbdb3901d9b7b52b601b5967f65b6745918a8..04b0561bce1d60d30ae3123c6a870d68d2f92d4c 100644
>--- a/Source/WTF/wtf/PrintStream.h
>+++ b/Source/WTF/wtf/PrintStream.h
>@@ -98,14 +98,14 @@ WTF_EXPORT_PRIVATE void printInternal(PrintStream&, const StringView&);
> WTF_EXPORT_PRIVATE void printInternal(PrintStream&, const CString&);
> WTF_EXPORT_PRIVATE void printInternal(PrintStream&, const String&);
> WTF_EXPORT_PRIVATE void printInternal(PrintStream&, const StringImpl*);
>-inline void printInternal(PrintStream& out, const AtomicStringImpl* value) { printInternal(out, bitwise_cast<const StringImpl*>(value)); }
>+inline void printInternal(PrintStream& out, const AtomStringImpl* value) { printInternal(out, bitwise_cast<const StringImpl*>(value)); }
> inline void printInternal(PrintStream& out, const UniquedStringImpl* value) { printInternal(out, bitwise_cast<const StringImpl*>(value)); }
> inline void printInternal(PrintStream& out, const UniquedStringImpl& value) { printInternal(out, &value); }
> inline void printInternal(PrintStream& out, char* value) { printInternal(out, static_cast<const char*>(value)); }
> inline void printInternal(PrintStream& out, CString& value) { printInternal(out, static_cast<const CString&>(value)); }
> inline void printInternal(PrintStream& out, String& value) { printInternal(out, static_cast<const String&>(value)); }
> inline void printInternal(PrintStream& out, StringImpl* value) { printInternal(out, static_cast<const StringImpl*>(value)); }
>-inline void printInternal(PrintStream& out, AtomicStringImpl* value) { printInternal(out, static_cast<const AtomicStringImpl*>(value)); }
>+inline void printInternal(PrintStream& out, AtomStringImpl* value) { printInternal(out, static_cast<const AtomStringImpl*>(value)); }
> inline void printInternal(PrintStream& out, UniquedStringImpl* value) { printInternal(out, static_cast<const UniquedStringImpl*>(value)); }
> inline void printInternal(PrintStream& out, UniquedStringImpl& value) { printInternal(out, &value); }
> WTF_EXPORT_PRIVATE void printInternal(PrintStream&, bool);
>diff --git a/Source/WTF/wtf/Threading.cpp b/Source/WTF/wtf/Threading.cpp
>index 908bafe63f9ce55698f2bde3160db51a6bd6e3c0..07e7d0f2316949088e498204eee9970075e4a131 100644
>--- a/Source/WTF/wtf/Threading.cpp
>+++ b/Source/WTF/wtf/Threading.cpp
>@@ -36,7 +36,7 @@
> #include <wtf/ThreadGroup.h>
> #include <wtf/ThreadMessage.h>
> #include <wtf/ThreadingPrimitives.h>
>-#include <wtf/text/AtomicStringTable.h>
>+#include <wtf/text/AtomStringTable.h>
> #include <wtf/text/StringView.h>
> 
> #if HAVE(QOS_CLASSES)
>@@ -111,12 +111,12 @@ void Thread::initializeInThread()
> m_stack = StackBounds::currentThreadStackBounds();
> m_savedLastStackTop = stack().origin();
> 
>- m_currentAtomicStringTable = &m_defaultAtomicStringTable;
>+ m_currentAtomStringTable = &m_defaultAtomStringTable;
> #if USE(WEB_THREAD)
>- // On iOS, one AtomicStringTable is shared between the main UI thread and the WebThread.
>+ // On iOS, one AtomStringTable is shared between the main UI thread and the WebThread.
> if (isWebThread() || isUIThread()) {
>- static NeverDestroyed<AtomicStringTable> sharedStringTable;
>- m_currentAtomicStringTable = &sharedStringTable.get();
>+ static NeverDestroyed<AtomStringTable> sharedStringTable;
>+ m_currentAtomStringTable = &sharedStringTable.get();
> }
> #endif
> }
>diff --git a/Source/WTF/wtf/Threading.h b/Source/WTF/wtf/Threading.h
>index 198a0e54c29252dd6c5a3a81af9c3ffc676cd502..6953f6eeefd4cc179c3266c34e6945df3237cf4b 100644
>--- a/Source/WTF/wtf/Threading.h
>+++ b/Source/WTF/wtf/Threading.h
>@@ -45,7 +45,7 @@
> #include <wtf/ThreadSafeRefCounted.h>
> #include <wtf/Vector.h>
> #include <wtf/WordLock.h>
>-#include <wtf/text/AtomicStringTable.h>
>+#include <wtf/text/AtomStringTable.h>
> 
> #if USE(PTHREADS) && !OS(DARWIN)
> #include <signal.h>
>@@ -156,16 +156,16 @@ public:
> return m_stack;
> }
> 
>- AtomicStringTable* atomicStringTable()
>+ AtomStringTable* atomStringTable()
> {
>- return m_currentAtomicStringTable;
>+ return m_currentAtomStringTable;
> }
> 
>- AtomicStringTable* setCurrentAtomicStringTable(AtomicStringTable* atomicStringTable)
>+ AtomStringTable* setCurrentAtomStringTable(AtomStringTable* atomStringTable)
> {
>- AtomicStringTable* oldAtomicStringTable = m_currentAtomicStringTable;
>- m_currentAtomicStringTable = atomicStringTable;
>- return oldAtomicStringTable;
>+ AtomStringTable* oldAtomStringTable = m_currentAtomStringTable;
>+ m_currentAtomStringTable = atomStringTable;
>+ return oldAtomStringTable;
> }
> 
> #if ENABLE(STACK_STATS)
>@@ -301,8 +301,8 @@ protected:
> unsigned m_suspendCount { 0 };
> #endif
> 
>- AtomicStringTable* m_currentAtomicStringTable { nullptr };
>- AtomicStringTable m_defaultAtomicStringTable;
>+ AtomStringTable* m_currentAtomStringTable { nullptr };
>+ AtomStringTable m_defaultAtomStringTable;
> 
> #if ENABLE(STACK_STATS)
> StackStats::PerThreadStats m_stackStats;
>diff --git a/Source/WTF/wtf/VectorTraits.h b/Source/WTF/wtf/VectorTraits.h
>index 2bf5eee1d2a661901d9488200ff1a47f7f411948..d7838c4e075b3cb614e7f166b86cd3de7d81e99c 100644
>--- a/Source/WTF/wtf/VectorTraits.h
>+++ b/Source/WTF/wtf/VectorTraits.h
>@@ -28,7 +28,7 @@
> 
> namespace WTF {
> 
>- class AtomicString;
>+ class AtomString;
> 
> template<bool isPod, typename T>
> struct VectorTraitsBase;
>@@ -71,7 +71,7 @@ namespace WTF {
> template<typename P> struct VectorTraits<RefPtr> : SimpleClassVectorTraits { };
> template<typename P> struct VectorTraits<std::unique_ptr> : SimpleClassVectorTraits { };
> template<typename P> struct VectorTraits<Ref> : SimpleClassVectorTraits { };
>- template<> struct VectorTraits<AtomicString> : SimpleClassVectorTraits { };
>+ template<> struct VectorTraits<AtomString> : SimpleClassVectorTraits { };
> 
> template<typename First, typename Second>
> struct VectorTraits<std::pair<First, Second>>
>diff --git a/Source/WTF/wtf/persistence/PersistentCoders.cpp b/Source/WTF/wtf/persistence/PersistentCoders.cpp
>index 99b2beeacbaa70698950b66cf4a01e79c2b12590..6ea25ea2fd97d9a222f2e0d4180dd283051cc158 100644
>--- a/Source/WTF/wtf/persistence/PersistentCoders.cpp
>+++ b/Source/WTF/wtf/persistence/PersistentCoders.cpp
>@@ -32,18 +32,18 @@
> namespace WTF {
> namespace Persistence {
> 
>-void Coder<AtomicString>::encode(Encoder& encoder, const AtomicString& atomicString)
>+void Coder<AtomString>::encode(Encoder& encoder, const AtomString& atomString)
> {
>- encoder << atomicString.string();
>+ encoder << atomString.string();
> }
> 
>-bool Coder<AtomicString>::decode(Decoder& decoder, AtomicString& atomicString)
>+bool Coder<AtomString>::decode(Decoder& decoder, AtomString& atomString)
> {
> String string;
> if (!decoder.decode(string))
> return false;
> 
>- atomicString = string;
>+ atomString = string;
> return true;
> }
> 
>diff --git a/Source/WTF/wtf/persistence/PersistentCoders.h b/Source/WTF/wtf/persistence/PersistentCoders.h
>index 933034f9ec6d46f12692d453b1b8db98e7e94224..7ee3c9329401e8cc70df136197961f8658160c88 100644
>--- a/Source/WTF/wtf/persistence/PersistentCoders.h
>+++ b/Source/WTF/wtf/persistence/PersistentCoders.h
>@@ -282,9 +282,9 @@ template<> struct Coder<WallTime> {
> }
> };
> 
>-template<> struct Coder<AtomicString> {
>- WTF_EXPORT_PRIVATE static void encode(Encoder&, const AtomicString&);
>- WTF_EXPORT_PRIVATE static bool decode(Decoder&, AtomicString&);
>+template<> struct Coder<AtomString> {
>+ WTF_EXPORT_PRIVATE static void encode(Encoder&, const AtomString&);
>+ WTF_EXPORT_PRIVATE static bool decode(Decoder&, AtomString&);
> };
> 
> template<> struct Coder<CString> {
>diff --git a/Source/WTF/wtf/text/AtomString.cpp b/Source/WTF/wtf/text/AtomString.cpp
>new file mode 100644
>index 0000000000000000000000000000000000000000..05f5c618bf973c6fc2a4ac02de6c156e66477ab5
>--- /dev/null
>+++ b/Source/WTF/wtf/text/AtomString.cpp
>@@ -0,0 +1,157 @@
>+/*
>+ * Copyright (C) 2004-2017 Apple Inc. All rights reserved.
>+ * Copyright (C) 2010 Patrick Gansterer <paroga@paroga.com>
>+ * Copyright (C) 2012 Google Inc. All rights reserved.
>+ *
>+ * This library is free software; you can redistribute it and/or
>+ * modify it under the terms of the GNU Library General Public
>+ * License as published by the Free Software Foundation; either
>+ * version 2 of the License, or (at your option) any later version.
>+ *
>+ * This library is distributed in the hope that it will be useful,
>+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
>+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
>+ * Library General Public License for more details.
>+ *
>+ * You should have received a copy of the GNU Library General Public License
>+ * along with this library; see the file COPYING.LIB. If not, write to
>+ * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
>+ * Boston, MA 02110-1301, USA.
>+ *
>+ */
>+
>+#include "config.h"
>+#include <wtf/text/AtomString.h>
>+
>+#include <mutex>
>+#include <wtf/MainThread.h>
>+#include <wtf/text/IntegerToStringConversion.h>
>+
>+#include <wtf/dtoa.h>
>+
>+namespace WTF {
>+
>+template<AtomString::CaseConvertType type>
>+ALWAYS_INLINE AtomString AtomString::convertASCIICase() const
>+{
>+ StringImpl* impl = this->impl();
>+ if (UNLIKELY(!impl))
>+ return nullAtom();
>+
>+ // Convert short strings without allocating a new StringImpl, since
>+ // there's a good chance these strings are already in the atomic
>+ // string table and so no memory allocation will be required.
>+ unsigned length;
>+ const unsigned localBufferSize = 100;
>+ if (impl->is8Bit() && (length = impl->length()) <= localBufferSize) {
>+ const LChar* characters = impl->characters8();
>+ unsigned failingIndex;
>+ for (unsigned i = 0; i < length; ++i) {
>+ if (type == CaseConvertType::Lower ? UNLIKELY(isASCIIUpper(characters[i])) : LIKELY(isASCIILower(characters[i]))) {
>+ failingIndex = i;
>+ goto SlowPath;
>+ }
>+ }
>+ return *this;
>+SlowPath:
>+ LChar localBuffer[localBufferSize];
>+ for (unsigned i = 0; i < failingIndex; ++i)
>+ localBuffer[i] = characters[i];
>+ for (unsigned i = failingIndex; i < length; ++i)
>+ localBuffer[i] = type == CaseConvertType::Lower ? toASCIILower(characters[i]) : toASCIIUpper(characters[i]);
>+ return AtomString(localBuffer, length);
>+ }
>+
>+ Ref<StringImpl> convertedString = type == CaseConvertType::Lower ? impl->convertToASCIILowercase() : impl->convertToASCIIUppercase();
>+ if (LIKELY(convertedString.ptr() == impl))
>+ return *this;
>+
>+ AtomString result;
>+ result.m_string = AtomStringImpl::add(convertedString.ptr());
>+ return result;
>+}
>+
>+AtomString AtomString::convertToASCIILowercase() const
>+{
>+ return convertASCIICase<CaseConvertType::Lower>();
>+}
>+
>+AtomString AtomString::convertToASCIIUppercase() const
>+{
>+ return convertASCIICase<CaseConvertType::Upper>();
>+}
>+
>+AtomString AtomString::number(int number)
>+{
>+ return numberToStringSigned<AtomString>(number);
>+}
>+
>+AtomString AtomString::number(unsigned number)
>+{
>+ return numberToStringUnsigned<AtomString>(number);
>+}
>+
>+AtomString AtomString::number(unsigned long number)
>+{
>+ return numberToStringUnsigned<AtomString>(number);
>+}
>+
>+AtomString AtomString::number(unsigned long long number)
>+{
>+ return numberToStringUnsigned<AtomString>(number);
>+}
>+
>+AtomString AtomString::number(float number)
>+{
>+ NumberToStringBuffer buffer;
>+ return numberToString(number, buffer);
>+}
>+
>+AtomString AtomString::number(double number)
>+{
>+ NumberToStringBuffer buffer;
>+ return numberToString(number, buffer);
>+}
>+
>+AtomString AtomString::fromUTF8Internal(const char* start, const char* end)
>+{
>+ ASSERT(start);
>+
>+ // Caller needs to handle empty string.
>+ ASSERT(!end || end > start);
>+ ASSERT(end || start[0]);
>+
>+ return AtomStringImpl::addUTF8(start, end ? end : start + std::strlen(start));
>+}
>+
>+#ifndef NDEBUG
>+
>+void AtomString::show() const
>+{
>+ m_string.show();
>+}
>+
>+#endif
>+
>+WTF_EXPORT_PRIVATE LazyNeverDestroyed<AtomString> nullAtomData;
>+WTF_EXPORT_PRIVATE LazyNeverDestroyed<AtomString> emptyAtomData;
>+WTF_EXPORT_PRIVATE LazyNeverDestroyed<AtomString> starAtomData;
>+WTF_EXPORT_PRIVATE LazyNeverDestroyed<AtomString> xmlAtomData;
>+WTF_EXPORT_PRIVATE LazyNeverDestroyed<AtomString> xmlnsAtomData;
>+
>+void AtomString::init()
>+{
>+ static std::once_flag initializeKey;
>+ std::call_once(initializeKey, [] {
>+ // Initialization is not thread safe, so this function must be called from the main thread first.
>+ ASSERT(isUIThread());
>+
>+ nullAtomData.construct();
>+ emptyAtomData.construct("");
>+ starAtomData.construct("*", AtomString::ConstructFromLiteral);
>+ xmlAtomData.construct("xml", AtomString::ConstructFromLiteral);
>+ xmlnsAtomData.construct("xmlns", AtomString::ConstructFromLiteral);
>+ });
>+}
>+
>+} // namespace WTF
>diff --git a/Source/WTF/wtf/text/AtomString.h b/Source/WTF/wtf/text/AtomString.h
>new file mode 100644
>index 0000000000000000000000000000000000000000..9d43e1fa7284eba14a7c3bcddd3394e63e96eba7
>--- /dev/null
>+++ b/Source/WTF/wtf/text/AtomString.h
>@@ -0,0 +1,370 @@
>+/*
>+ * Copyright (C) 2004-2017 Apple Inc. All rights reserved.
>+ *
>+ * This library is free software; you can redistribute it and/or
>+ * modify it under the terms of the GNU Library General Public
>+ * License as published by the Free Software Foundation; either
>+ * version 2 of the License, or (at your option) any later version.
>+ *
>+ * This library is distributed in the hope that it will be useful,
>+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
>+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
>+ * Library General Public License for more details.
>+ *
>+ * You should have received a copy of the GNU Library General Public License
>+ * along with this library; see the file COPYING.LIB. If not, write to
>+ * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
>+ * Boston, MA 02110-1301, USA.
>+ *
>+ */
>+
>+#pragma once
>+
>+#include <utility>
>+#include <wtf/NeverDestroyed.h>
>+#include <wtf/text/AtomStringImpl.h>
>+#include <wtf/text/IntegerToStringConversion.h>
>+#include <wtf/text/WTFString.h>
>+
>+#if OS(WINDOWS)
>+#include <wtf/text/win/WCharStringExtras.h>
>+#endif
>+
>+namespace WTF {
>+
>+struct AtomStringHash;
>+
>+class AtomString {
>+public:
>+ WTF_EXPORT_PRIVATE static void init();
>+
>+ AtomString();
>+ AtomString(const LChar*);
>+ AtomString(const char*);
>+ AtomString(const LChar*, unsigned length);
>+ AtomString(const UChar*, unsigned length);
>+ AtomString(const UChar*);
>+
>+ template<size_t inlineCapacity>
>+ explicit AtomString(const Vector<UChar, inlineCapacity>& characters)
>+ : m_string(AtomStringImpl::add(characters.data(), characters.size()))
>+ {
>+ }
>+
>+ AtomString(AtomStringImpl*);
>+ AtomString(RefPtr<AtomStringImpl>&&);
>+ AtomString(const StaticStringImpl*);
>+ AtomString(StringImpl*);
>+ AtomString(const String&);
>+ AtomString(StringImpl* baseString, unsigned start, unsigned length);
>+
>+ // FIXME: AtomString doesnât always have AtomStringImpl, so one of those two names needs to change.
>+ AtomString(UniquedStringImpl* uid);
>+
>+ enum ConstructFromLiteralTag { ConstructFromLiteral };
>+ AtomString(const char* characters, unsigned length, ConstructFromLiteralTag)
>+ : m_string(AtomStringImpl::addLiteral(characters, length))
>+ {
>+ }
>+
>+ template<unsigned characterCount> ALWAYS_INLINE AtomString(const char (&characters)[characterCount], ConstructFromLiteralTag)
>+ : m_string(AtomStringImpl::addLiteral(characters, characterCount - 1))
>+ {
>+ COMPILE_ASSERT(characterCount > 1, AtomStringFromLiteralNotEmpty);
>+ COMPILE_ASSERT((characterCount - 1 <= ((unsigned(~0) - sizeof(StringImpl)) / sizeof(LChar))), AtomStringFromLiteralCannotOverflow);
>+ }
>+
>+ // We have to declare the copy constructor and copy assignment operator as well, otherwise
>+ // they'll be implicitly deleted by adding the move constructor and move assignment operator.
>+ AtomString(const AtomString& other) : m_string(other.m_string) { }
>+ AtomString(AtomString&& other) : m_string(WTFMove(other.m_string)) { }
>+ AtomString& operator=(const AtomString& other) { m_string = other.m_string; return *this; }
>+ AtomString& operator=(AtomString&& other) { m_string = WTFMove(other.m_string); return *this; }
>+
>+ // Hash table deleted values, which are only constructed and never copied or destroyed.
>+ AtomString(WTF::HashTableDeletedValueType) : m_string(WTF::HashTableDeletedValue) { }
>+ bool isHashTableDeletedValue() const { return m_string.isHashTableDeletedValue(); }
>+
>+ unsigned existingHash() const { return isNull() ? 0 : impl()->existingHash(); }
>+
>+ operator const String&() const { return m_string; }
>+ const String& string() const { return m_string; };
>+
>+ AtomStringImpl* impl() const { return static_cast<AtomStringImpl *>(m_string.impl()); }
>+
>+ bool is8Bit() const { return m_string.is8Bit(); }
>+ const LChar* characters8() const { return m_string.characters8(); }
>+ const UChar* characters16() const { return m_string.characters16(); }
>+ unsigned length() const { return m_string.length(); }
>+
>+ UChar operator[](unsigned int i) const { return m_string[i]; }
>+
>+ WTF_EXPORT_PRIVATE static AtomString number(int);
>+ WTF_EXPORT_PRIVATE static AtomString number(unsigned);
>+ WTF_EXPORT_PRIVATE static AtomString number(unsigned long);
>+ WTF_EXPORT_PRIVATE static AtomString number(unsigned long long);
>+ WTF_EXPORT_PRIVATE static AtomString number(float);
>+ WTF_EXPORT_PRIVATE static AtomString number(double);
>+ // If we need more overloads of the number function, we can add all the others that String has, but these seem to do for now.
>+
>+ bool contains(UChar character) const { return m_string.contains(character); }
>+ bool contains(const LChar* string) const { return m_string.contains(string); }
>+ bool contains(const String& string) const { return m_string.contains(string); }
>+ bool containsIgnoringASCIICase(const String& string) const { return m_string.containsIgnoringASCIICase(string); }
>+
>+ size_t find(UChar character, unsigned start = 0) const { return m_string.find(character, start); }
>+ size_t find(const LChar* string, unsigned start = 0) const { return m_string.find(string, start); }
>+ size_t find(const String& string, unsigned start = 0) const { return m_string.find(string, start); }
>+ size_t findIgnoringASCIICase(const String& string) const { return m_string.findIgnoringASCIICase(string); }
>+ size_t findIgnoringASCIICase(const String& string, unsigned startOffset) const { return m_string.findIgnoringASCIICase(string, startOffset); }
>+ size_t find(CodeUnitMatchFunction matchFunction, unsigned start = 0) const { return m_string.find(matchFunction, start); }
>+
>+ bool startsWith(const String& string) const { return m_string.startsWith(string); }
>+ bool startsWithIgnoringASCIICase(const String& string) const { return m_string.startsWithIgnoringASCIICase(string); }
>+ bool startsWith(UChar character) const { return m_string.startsWith(character); }
>+ template<unsigned matchLength> bool startsWith(const char (&prefix)[matchLength]) const { return m_string.startsWith<matchLength>(prefix); }
>+
>+ bool endsWith(const String& string) const { return m_string.endsWith(string); }
>+ bool endsWithIgnoringASCIICase(const String& string) const { return m_string.endsWithIgnoringASCIICase(string); }
>+ bool endsWith(UChar character) const { return m_string.endsWith(character); }
>+ template<unsigned matchLength> bool endsWith(const char (&prefix)[matchLength]) const { return m_string.endsWith<matchLength>(prefix); }
>+
>+ WTF_EXPORT_PRIVATE AtomString convertToASCIILowercase() const;
>+ WTF_EXPORT_PRIVATE AtomString convertToASCIIUppercase() const;
>+
>+ int toInt(bool* ok = 0) const { return m_string.toInt(ok); }
>+ double toDouble(bool* ok = 0) const { return m_string.toDouble(ok); }
>+ float toFloat(bool* ok = 0) const { return m_string.toFloat(ok); }
>+ bool percentage(int& p) const { return m_string.percentage(p); }
>+
>+ bool isNull() const { return m_string.isNull(); }
>+ bool isEmpty() const { return m_string.isEmpty(); }
>+
>+#if USE(CF)
>+ AtomString(CFStringRef);
>+#endif
>+
>+#ifdef __OBJC__
>+ AtomString(NSString*);
>+ operator NSString*() const { return m_string; }
>+#endif
>+
>+#if OS(WINDOWS) && U_ICU_VERSION_MAJOR_NUM >= 59
>+ AtomString(const wchar_t* characters, unsigned length)
>+ : AtomString(ucharFrom(characters), length) { }
>+
>+ AtomString(const wchar_t* characters)
>+ : AtomString(ucharFrom(characters)) { }
>+#endif
>+
>+ // AtomString::fromUTF8 will return a null string if the input data contains invalid UTF-8 sequences.
>+ static AtomString fromUTF8(const char*, size_t);
>+ static AtomString fromUTF8(const char*);
>+
>+#ifndef NDEBUG
>+ void show() const;
>+#endif
>+
>+private:
>+ // The explicit constructors with AtomString::ConstructFromLiteral must be used for literals.
>+ AtomString(ASCIILiteral);
>+
>+ enum class CaseConvertType { Upper, Lower };
>+ template<CaseConvertType> AtomString convertASCIICase() const;
>+
>+ WTF_EXPORT_PRIVATE static AtomString fromUTF8Internal(const char*, const char*);
>+
>+ String m_string;
>+};
>+
>+using AtomicString = AtomString;
>+
>+static_assert(sizeof(AtomString) == sizeof(String), "AtomString and String must be same size!");
>+
>+inline bool operator==(const AtomString& a, const AtomString& b) { return a.impl() == b.impl(); }
>+bool operator==(const AtomString&, const LChar*);
>+inline bool operator==(const AtomString& a, const char* b) { return WTF::equal(a.impl(), reinterpret_cast<const LChar*>(b)); }
>+inline bool operator==(const AtomString& a, const Vector<UChar>& b) { return a.impl() && equal(a.impl(), b.data(), b.size()); } 
>+inline bool operator==(const AtomString& a, const String& b) { return equal(a.impl(), b.impl()); }
>+inline bool operator==(const LChar* a, const AtomString& b) { return b == a; }
>+inline bool operator==(const String& a, const AtomString& b) { return equal(a.impl(), b.impl()); }
>+inline bool operator==(const Vector<UChar>& a, const AtomString& b) { return b == a; }
>+
>+inline bool operator!=(const AtomString& a, const AtomString& b) { return a.impl() != b.impl(); }
>+inline bool operator!=(const AtomString& a, const LChar* b) { return !(a == b); }
>+inline bool operator!=(const AtomString& a, const char* b) { return !(a == b); }
>+inline bool operator!=(const AtomString& a, const String& b) { return !equal(a.impl(), b.impl()); }
>+inline bool operator!=(const AtomString& a, const Vector<UChar>& b) { return !(a == b); }
>+inline bool operator!=(const LChar* a, const AtomString& b) { return !(b == a); }
>+inline bool operator!=(const String& a, const AtomString& b) { return !equal(a.impl(), b.impl()); }
>+inline bool operator!=(const Vector<UChar>& a, const AtomString& b) { return !(a == b); }
>+
>+bool equalIgnoringASCIICase(const AtomString&, const AtomString&);
>+bool equalIgnoringASCIICase(const AtomString&, const String&);
>+bool equalIgnoringASCIICase(const String&, const AtomString&);
>+bool equalIgnoringASCIICase(const AtomString&, const char*);
>+
>+template<unsigned length> bool equalLettersIgnoringASCIICase(const AtomString&, const char (&lowercaseLetters)[length]);
>+
>+inline AtomString::AtomString()
>+{
>+}
>+
>+inline AtomString::AtomString(const LChar* string)
>+ : m_string(AtomStringImpl::add(string))
>+{
>+}
>+
>+inline AtomString::AtomString(const char* string)
>+ : m_string(AtomStringImpl::add(string))
>+{
>+}
>+
>+inline AtomString::AtomString(const LChar* string, unsigned length)
>+ : m_string(AtomStringImpl::add(string, length))
>+{
>+}
>+
>+inline AtomString::AtomString(const UChar* string, unsigned length)
>+ : m_string(AtomStringImpl::add(string, length))
>+{
>+}
>+
>+inline AtomString::AtomString(const UChar* string)
>+ : m_string(AtomStringImpl::add(string))
>+{
>+}
>+
>+inline AtomString::AtomString(AtomStringImpl* string)
>+ : m_string(string)
>+{
>+}
>+
>+inline AtomString::AtomString(RefPtr<AtomStringImpl>&& string)
>+ : m_string(WTFMove(string))
>+{
>+}
>+
>+inline AtomString::AtomString(StringImpl* string)
>+ : m_string(AtomStringImpl::add(string))
>+{
>+}
>+
>+inline AtomString::AtomString(const StaticStringImpl* string)
>+ : m_string(AtomStringImpl::add(string))
>+{
>+}
>+
>+inline AtomString::AtomString(const String& string)
>+ : m_string(AtomStringImpl::add(string.impl()))
>+{
>+}
>+
>+inline AtomString::AtomString(StringImpl* baseString, unsigned start, unsigned length)
>+ : m_string(AtomStringImpl::add(baseString, start, length))
>+{
>+}
>+
>+inline AtomString::AtomString(UniquedStringImpl* uid)
>+ : m_string(uid)
>+{
>+}
>+
>+#if USE(CF)
>+
>+inline AtomString::AtomString(CFStringRef string)
>+ : m_string(AtomStringImpl::add(string))
>+{
>+}
>+
>+#endif
>+
>+#ifdef __OBJC__
>+
>+inline AtomString::AtomString(NSString* string)
>+ : m_string(AtomStringImpl::add((__bridge CFStringRef)string))
>+{
>+}
>+
>+#endif
>+
>+// Define external global variables for the commonly used atomic strings.
>+// These are only usable from the main thread.
>+extern WTF_EXPORT_PRIVATE LazyNeverDestroyed<AtomString> nullAtomData;
>+extern WTF_EXPORT_PRIVATE LazyNeverDestroyed<AtomString> emptyAtomData;
>+extern WTF_EXPORT_PRIVATE LazyNeverDestroyed<AtomString> starAtomData;
>+extern WTF_EXPORT_PRIVATE LazyNeverDestroyed<AtomString> xmlAtomData;
>+extern WTF_EXPORT_PRIVATE LazyNeverDestroyed<AtomString> xmlnsAtomData;
>+
>+inline const AtomString& nullAtom() { return nullAtomData.get(); }
>+inline const AtomString& emptyAtom() { return emptyAtomData.get(); }
>+inline const AtomString& starAtom() { return starAtomData.get(); }
>+inline const AtomString& xmlAtom() { return xmlAtomData.get(); }
>+inline const AtomString& xmlnsAtom() { return xmlnsAtomData.get(); }
>+
>+inline AtomString AtomString::fromUTF8(const char* characters, size_t length)
>+{
>+ if (!characters)
>+ return nullAtom();
>+ if (!length)
>+ return emptyAtom();
>+ return fromUTF8Internal(characters, characters + length);
>+}
>+
>+inline AtomString AtomString::fromUTF8(const char* characters)
>+{
>+ if (!characters)
>+ return nullAtom();
>+ if (!*characters)
>+ return emptyAtom();
>+ return fromUTF8Internal(characters, nullptr);
>+}
>+
>+// AtomStringHash is the default hash for AtomString
>+template<typename T> struct DefaultHash;
>+template<> struct DefaultHash<AtomString> {
>+ typedef AtomStringHash Hash;
>+};
>+
>+template<unsigned length> inline bool equalLettersIgnoringASCIICase(const AtomString& string, const char (&lowercaseLetters)[length])
>+{
>+ return equalLettersIgnoringASCIICase(string.string(), lowercaseLetters);
>+}
>+
>+inline bool equalIgnoringASCIICase(const AtomString& a, const AtomString& b)
>+{
>+ return equalIgnoringASCIICase(a.string(), b.string());
>+}
>+
>+inline bool equalIgnoringASCIICase(const AtomString& a, const String& b)
>+{
>+ return equalIgnoringASCIICase(a.string(), b);
>+}
>+
>+inline bool equalIgnoringASCIICase(const String& a, const AtomString& b)
>+{
>+ return equalIgnoringASCIICase(a, b.string());
>+}
>+
>+inline bool equalIgnoringASCIICase(const AtomString& a, const char* b)
>+{
>+ return equalIgnoringASCIICase(a.string(), b);
>+}
>+
>+template<> struct IntegerToStringConversionTrait<AtomString> {
>+ using ReturnType = AtomString;
>+ using AdditionalArgumentType = void;
>+ static AtomString flush(LChar* characters, unsigned length, void*) { return { characters, length }; }
>+};
>+
>+} // namespace WTF
>+
>+using WTF::AtomString;
>+using WTF::AtomicString;
>+using WTF::nullAtom;
>+using WTF::emptyAtom;
>+using WTF::starAtom;
>+using WTF::xmlAtom;
>+using WTF::xmlnsAtom;
>+
>+#include <wtf/text/StringConcatenate.h>
>diff --git a/Source/WTF/wtf/text/AtomStringHash.h b/Source/WTF/wtf/text/AtomStringHash.h
>new file mode 100644
>index 0000000000000000000000000000000000000000..04f5908cc1cc634856a4829bf8458087081bbc98
>--- /dev/null
>+++ b/Source/WTF/wtf/text/AtomStringHash.h
>@@ -0,0 +1,68 @@
>+/*
>+ * Copyright (C) 2008 Apple Inc. All rights reserved.
>+ *
>+ * Redistribution and use in source and binary forms, with or without
>+ * modification, are permitted provided that the following conditions
>+ * are met:
>+ *
>+ * 1. Redistributions of source code must retain the above copyright
>+ * notice, this list of conditions and the following disclaimer. 
>+ * 2. Redistributions in binary form must reproduce the above copyright
>+ * notice, this list of conditions and the following disclaimer in the
>+ * documentation and/or other materials provided with the distribution. 
>+ * 3. Neither the name of Apple Inc. ("Apple") nor the names of
>+ * its contributors may be used to endorse or promote products derived
>+ * from this software without specific prior written permission. 
>+ *
>+ * THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "AS IS" AND ANY
>+ * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
>+ * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
>+ * DISCLAIMED. IN NO EVENT SHALL APPLE OR ITS CONTRIBUTORS BE LIABLE FOR ANY
>+ * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
>+ * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
>+ * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
>+ * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
>+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
>+ * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
>+ */
>+
>+#pragma once
>+
>+#include <wtf/text/AtomString.h>
>+#include <wtf/HashTraits.h>
>+
>+namespace WTF {
>+
>+ struct AtomStringHash {
>+ static unsigned hash(const AtomString& key)
>+ {
>+ return key.impl()->existingHash();
>+ }
>+
>+ static bool equal(const AtomString& a, const AtomString& b)
>+ {
>+ return a == b;
>+ }
>+
>+ static const bool safeToCompareToEmptyOrDeleted = false;
>+ };
>+
>+ template<> struct HashTraits<WTF::AtomString> : SimpleClassHashTraits<WTF::AtomString> {
>+ static const bool hasIsEmptyValueFunction = true;
>+ static bool isEmptyValue(const AtomString& value)
>+ {
>+ return value.isNull();
>+ }
>+
>+ static void customDeleteBucket(AtomString& value)
>+ {
>+ // See unique_ptr's customDeleteBucket() for an explanation.
>+ ASSERT(!isDeletedValue(value));
>+ AtomString valueToBeDestroyed = WTFMove(value);
>+ constructDeletedValue(value);
>+ }
>+ };
>+
>+}
>+
>+using WTF::AtomStringHash;
>diff --git a/Source/WTF/wtf/text/AtomStringImpl.cpp b/Source/WTF/wtf/text/AtomStringImpl.cpp
>new file mode 100644
>index 0000000000000000000000000000000000000000..87a64eeab25aa74dc0b91907b2c8448b95d1fc9c
>--- /dev/null
>+++ b/Source/WTF/wtf/text/AtomStringImpl.cpp
>@@ -0,0 +1,553 @@
>+/*
>+ * Copyright (C) 2004-2008, 2013-2014 Apple Inc. All rights reserved.
>+ * Copyright (C) 2010 Patrick Gansterer <paroga@paroga.com>
>+ * Copyright (C) 2012 Google Inc. All rights reserved.
>+ * Copyright (C) 2015 Yusuke Suzuki<utatane.tea@gmail.com>. All rights reserved.
>+ *
>+ * This library is free software; you can redistribute it and/or
>+ * modify it under the terms of the GNU Library General Public
>+ * License as published by the Free Software Foundation; either
>+ * version 2 of the License, or (at your option) any later version.
>+ *
>+ * This library is distributed in the hope that it will be useful,
>+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
>+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
>+ * Library General Public License for more details.
>+ *
>+ * You should have received a copy of the GNU Library General Public License
>+ * along with this library; see the file COPYING.LIB. If not, write to
>+ * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
>+ * Boston, MA 02110-1301, USA.
>+ *
>+ */
>+
>+#include "config.h"
>+#include <wtf/text/AtomStringImpl.h>
>+
>+#include <wtf/CommaPrinter.h>
>+#include <wtf/DataLog.h>
>+#include <wtf/HashSet.h>
>+#include <wtf/StringPrintStream.h>
>+#include <wtf/Threading.h>
>+#include <wtf/text/AtomStringTable.h>
>+#include <wtf/text/IntegerToStringConversion.h>
>+#include <wtf/text/StringHash.h>
>+#include <wtf/unicode/UTF8Conversion.h>
>+
>+#if USE(WEB_THREAD)
>+#include <wtf/Lock.h>
>+#endif
>+
>+namespace WTF {
>+
>+using namespace Unicode;
>+
>+#if USE(WEB_THREAD)
>+
>+class AtomStringTableLocker : public LockHolder {
>+ WTF_MAKE_NONCOPYABLE(AtomStringTableLocker);
>+
>+ static Lock s_stringTableLock;
>+public:
>+ AtomStringTableLocker()
>+ : LockHolder(&s_stringTableLock)
>+ {
>+ }
>+};
>+
>+Lock AtomStringTableLocker::s_stringTableLock;
>+
>+#else
>+
>+class AtomStringTableLocker {
>+ WTF_MAKE_NONCOPYABLE(AtomStringTableLocker);
>+public:
>+ AtomStringTableLocker() { }
>+};
>+
>+#endif // USE(WEB_THREAD)
>+
>+using StringTableImpl = HashSet<StringImpl*>;
>+
>+static ALWAYS_INLINE StringTableImpl& stringTable()
>+{
>+ return Thread::current().atomStringTable()->table();
>+}
>+
>+template<typename T, typename HashTranslator>
>+static inline Ref<AtomStringImpl> addToStringTable(AtomStringTableLocker&, StringTableImpl& atomStringTable, const T& value)
>+{
>+ auto addResult = atomStringTable.add<HashTranslator>(value);
>+
>+ // If the string is newly-translated, then we need to adopt it.
>+ // The boolean in the pair tells us if that is so.
>+ if (addResult.isNewEntry)
>+ return adoptRef(static_cast<AtomStringImpl&>(**addResult.iterator));
>+ return *static_cast<AtomStringImpl*>(*addResult.iterator);
>+}
>+
>+template<typename T, typename HashTranslator>
>+static inline Ref<AtomStringImpl> addToStringTable(const T& value)
>+{
>+ AtomStringTableLocker locker;
>+ return addToStringTable<T, HashTranslator>(locker, stringTable(), value);
>+}
>+
>+struct CStringTranslator {
>+ static unsigned hash(const LChar* characters)
>+ {
>+ return StringHasher::computeHashAndMaskTop8Bits(characters);
>+ }
>+
>+ static inline bool equal(StringImpl* str, const LChar* characters)
>+ {
>+ return WTF::equal(str, characters);
>+ }
>+
>+ static void translate(StringImpl*& location, const LChar* const& characters, unsigned hash)
>+ {
>+ location = &StringImpl::create(characters).leakRef();
>+ location->setHash(hash);
>+ location->setIsAtomic(true);
>+ }
>+};
>+
>+RefPtr<AtomStringImpl> AtomStringImpl::add(const LChar* characters)
>+{
>+ if (!characters)
>+ return nullptr;
>+ if (!*characters)
>+ return static_cast<AtomStringImpl*>(StringImpl::empty());
>+
>+ return addToStringTable<const LChar*, CStringTranslator>(characters);
>+}
>+
>+template<typename CharacterType>
>+struct HashTranslatorCharBuffer {
>+ const CharacterType* characters;
>+ unsigned length;
>+ unsigned hash;
>+
>+ HashTranslatorCharBuffer(const CharacterType* characters, unsigned length)
>+ : characters(characters)
>+ , length(length)
>+ , hash(StringHasher::computeHashAndMaskTop8Bits(characters, length))
>+ {
>+ }
>+
>+ HashTranslatorCharBuffer(const CharacterType* characters, unsigned length, unsigned hash)
>+ : characters(characters)
>+ , length(length)
>+ , hash(hash)
>+ {
>+ }
>+};
>+
>+using UCharBuffer = HashTranslatorCharBuffer<UChar>;
>+struct UCharBufferTranslator {
>+ static unsigned hash(const UCharBuffer& buf)
>+ {
>+ return buf.hash;
>+ }
>+
>+ static bool equal(StringImpl* const& str, const UCharBuffer& buf)
>+ {
>+ return WTF::equal(str, buf.characters, buf.length);
>+ }
>+
>+ static void translate(StringImpl*& location, const UCharBuffer& buf, unsigned hash)
>+ {
>+ location = &StringImpl::create8BitIfPossible(buf.characters, buf.length).leakRef();
>+ location->setHash(hash);
>+ location->setIsAtomic(true);
>+ }
>+};
>+
>+struct HashAndUTF8Characters {
>+ unsigned hash;
>+ const char* characters;
>+ unsigned length;
>+ unsigned utf16Length;
>+};
>+
>+struct HashAndUTF8CharactersTranslator {
>+ static unsigned hash(const HashAndUTF8Characters& buffer)
>+ {
>+ return buffer.hash;
>+ }
>+
>+ static bool equal(StringImpl* const& string, const HashAndUTF8Characters& buffer)
>+ {
>+ if (buffer.utf16Length != string->length())
>+ return false;
>+
>+ // If buffer contains only ASCII characters UTF-8 and UTF16 length are the same.
>+ if (buffer.utf16Length != buffer.length) {
>+ if (string->is8Bit())
>+ return equalLatin1WithUTF8(string->characters8(), buffer.characters, buffer.characters + buffer.length);
>+
>+ return equalUTF16WithUTF8(string->characters16(), buffer.characters, buffer.characters + buffer.length);
>+ }
>+
>+ if (string->is8Bit()) {
>+ const LChar* stringCharacters = string->characters8();
>+
>+ for (unsigned i = 0; i < buffer.length; ++i) {
>+ ASSERT(isASCII(buffer.characters[i]));
>+ if (stringCharacters[i] != buffer.characters[i])
>+ return false;
>+ }
>+
>+ return true;
>+ }
>+
>+ const UChar* stringCharacters = string->characters16();
>+
>+ for (unsigned i = 0; i < buffer.length; ++i) {
>+ ASSERT(isASCII(buffer.characters[i]));
>+ if (stringCharacters[i] != buffer.characters[i])
>+ return false;
>+ }
>+
>+ return true;
>+ }
>+
>+ static void translate(StringImpl*& location, const HashAndUTF8Characters& buffer, unsigned hash)
>+ {
>+ UChar* target;
>+ auto newString = StringImpl::createUninitialized(buffer.utf16Length, target);
>+
>+ bool isAllASCII;
>+ const char* source = buffer.characters;
>+ if (!convertUTF8ToUTF16(source, source + buffer.length, &target, target + buffer.utf16Length, &isAllASCII))
>+ ASSERT_NOT_REACHED();
>+
>+ if (isAllASCII)
>+ newString = StringImpl::create(buffer.characters, buffer.length);
>+
>+ location = &newString.leakRef();
>+ location->setHash(hash);
>+ location->setIsAtomic(true);
>+ }
>+};
>+
>+RefPtr<AtomStringImpl> AtomStringImpl::add(const UChar* characters, unsigned length)
>+{
>+ if (!characters)
>+ return nullptr;
>+
>+ if (!length)
>+ return static_cast<AtomStringImpl*>(StringImpl::empty());
>+
>+ UCharBuffer buffer { characters, length };
>+ return addToStringTable<UCharBuffer, UCharBufferTranslator>(buffer);
>+}
>+
>+RefPtr<AtomStringImpl> AtomStringImpl::add(const UChar* characters)
>+{
>+ if (!characters)
>+ return nullptr;
>+
>+ unsigned length = 0;
>+ while (characters[length] != UChar(0))
>+ ++length;
>+
>+ if (!length)
>+ return static_cast<AtomStringImpl*>(StringImpl::empty());
>+
>+ UCharBuffer buffer { characters, length };
>+ return addToStringTable<UCharBuffer, UCharBufferTranslator>(buffer);
>+}
>+
>+struct SubstringLocation {
>+ StringImpl* baseString;
>+ unsigned start;
>+ unsigned length;
>+};
>+
>+struct SubstringTranslator {
>+ static void translate(StringImpl*& location, const SubstringLocation& buffer, unsigned hash)
>+ {
>+ location = &StringImpl::createSubstringSharingImpl(*buffer.baseString, buffer.start, buffer.length).leakRef();
>+ location->setHash(hash);
>+ location->setIsAtomic(true);
>+ }
>+};
>+
>+struct SubstringTranslator8 : SubstringTranslator {
>+ static unsigned hash(const SubstringLocation& buffer)
>+ {
>+ return StringHasher::computeHashAndMaskTop8Bits(buffer.baseString->characters8() + buffer.start, buffer.length);
>+ }
>+
>+ static bool equal(StringImpl* const& string, const SubstringLocation& buffer)
>+ {
>+ return WTF::equal(string, buffer.baseString->characters8() + buffer.start, buffer.length);
>+ }
>+};
>+
>+struct SubstringTranslator16 : SubstringTranslator {
>+ static unsigned hash(const SubstringLocation& buffer)
>+ {
>+ return StringHasher::computeHashAndMaskTop8Bits(buffer.baseString->characters16() + buffer.start, buffer.length);
>+ }
>+
>+ static bool equal(StringImpl* const& string, const SubstringLocation& buffer)
>+ {
>+ return WTF::equal(string, buffer.baseString->characters16() + buffer.start, buffer.length);
>+ }
>+};
>+
>+RefPtr<AtomStringImpl> AtomStringImpl::add(StringImpl* baseString, unsigned start, unsigned length)
>+{
>+ if (!baseString)
>+ return nullptr;
>+
>+ if (!length || start >= baseString->length())
>+ return static_cast<AtomStringImpl*>(StringImpl::empty());
>+
>+ unsigned maxLength = baseString->length() - start;
>+ if (length >= maxLength) {
>+ if (!start)
>+ return add(baseString);
>+ length = maxLength;
>+ }
>+
>+ SubstringLocation buffer = { baseString, start, length };
>+ if (baseString->is8Bit())
>+ return addToStringTable<SubstringLocation, SubstringTranslator8>(buffer);
>+ return addToStringTable<SubstringLocation, SubstringTranslator16>(buffer);
>+}
>+ 
>+using LCharBuffer = HashTranslatorCharBuffer<LChar>;
>+struct LCharBufferTranslator {
>+ static unsigned hash(const LCharBuffer& buf)
>+ {
>+ return buf.hash;
>+ }
>+
>+ static bool equal(StringImpl* const& str, const LCharBuffer& buf)
>+ {
>+ return WTF::equal(str, buf.characters, buf.length);
>+ }
>+
>+ static void translate(StringImpl*& location, const LCharBuffer& buf, unsigned hash)
>+ {
>+ location = &StringImpl::create(buf.characters, buf.length).leakRef();
>+ location->setHash(hash);
>+ location->setIsAtomic(true);
>+ }
>+};
>+
>+template<typename CharType>
>+struct BufferFromStaticDataTranslator {
>+ using Buffer = HashTranslatorCharBuffer<CharType>;
>+ static unsigned hash(const Buffer& buf)
>+ {
>+ return buf.hash;
>+ }
>+
>+ static bool equal(StringImpl* const& str, const Buffer& buf)
>+ {
>+ return WTF::equal(str, buf.characters, buf.length);
>+ }
>+
>+ static void translate(StringImpl*& location, const Buffer& buf, unsigned hash)
>+ {
>+ location = &StringImpl::createWithoutCopying(buf.characters, buf.length).leakRef();
>+ location->setHash(hash);
>+ location->setIsAtomic(true);
>+ }
>+};
>+
>+RefPtr<AtomStringImpl> AtomStringImpl::add(const LChar* characters, unsigned length)
>+{
>+ if (!characters)
>+ return nullptr;
>+
>+ if (!length)
>+ return static_cast<AtomStringImpl*>(StringImpl::empty());
>+
>+ LCharBuffer buffer { characters, length };
>+ return addToStringTable<LCharBuffer, LCharBufferTranslator>(buffer);
>+}
>+
>+Ref<AtomStringImpl> AtomStringImpl::addLiteral(const char* characters, unsigned length)
>+{
>+ ASSERT(characters);
>+ ASSERT(length);
>+
>+ LCharBuffer buffer { reinterpret_cast<const LChar*>(characters), length };
>+ return addToStringTable<LCharBuffer, BufferFromStaticDataTranslator<LChar>>(buffer);
>+}
>+
>+static Ref<AtomStringImpl> addSymbol(AtomStringTableLocker& locker, StringTableImpl& atomStringTable, StringImpl& base)
>+{
>+ ASSERT(base.length());
>+ ASSERT(base.isSymbol());
>+
>+ SubstringLocation buffer = { &base, 0, base.length() };
>+ if (base.is8Bit())
>+ return addToStringTable<SubstringLocation, SubstringTranslator8>(locker, atomStringTable, buffer);
>+ return addToStringTable<SubstringLocation, SubstringTranslator16>(locker, atomStringTable, buffer);
>+}
>+
>+static inline Ref<AtomStringImpl> addSymbol(StringImpl& base)
>+{
>+ AtomStringTableLocker locker;
>+ return addSymbol(locker, stringTable(), base);
>+}
>+
>+static Ref<AtomStringImpl> addStatic(AtomStringTableLocker& locker, StringTableImpl& atomStringTable, const StringImpl& base)
>+{
>+ ASSERT(base.length());
>+ ASSERT(base.isStatic());
>+
>+ if (base.is8Bit()) {
>+ LCharBuffer buffer { base.characters8(), base.length(), base.hash() };
>+ return addToStringTable<LCharBuffer, BufferFromStaticDataTranslator<LChar>>(locker, atomStringTable, buffer);
>+ }
>+ UCharBuffer buffer { base.characters16(), base.length(), base.hash() };
>+ return addToStringTable<UCharBuffer, BufferFromStaticDataTranslator<UChar>>(locker, atomStringTable, buffer);
>+}
>+
>+static inline Ref<AtomStringImpl> addStatic(const StringImpl& base)
>+{
>+ AtomStringTableLocker locker;
>+ return addStatic(locker, stringTable(), base);
>+}
>+
>+RefPtr<AtomStringImpl> AtomStringImpl::add(const StaticStringImpl* string)
>+{
>+ auto s = reinterpret_cast<const StringImpl*>(string);
>+ ASSERT(s->isStatic());
>+ return addStatic(*s);
>+}
>+
>+Ref<AtomStringImpl> AtomStringImpl::addSlowCase(StringImpl& string)
>+{
>+ // This check is necessary for null symbols.
>+ // Their length is zero, but they are not AtomStringImpl.
>+ if (!string.length())
>+ return *static_cast<AtomStringImpl*>(StringImpl::empty());
>+
>+ if (string.isStatic())
>+ return addStatic(string);
>+
>+ if (string.isSymbol())
>+ return addSymbol(string);
>+
>+ ASSERT_WITH_MESSAGE(!string.isAtom(), "AtomStringImpl should not hit the slow case if the string is already atomic.");
>+
>+ AtomStringTableLocker locker;
>+ auto addResult = stringTable().add(&string);
>+
>+ if (addResult.isNewEntry) {
>+ ASSERT(*addResult.iterator == &string);
>+ string.setIsAtomic(true);
>+ }
>+
>+ return *static_cast<AtomStringImpl*>(*addResult.iterator);
>+}
>+
>+Ref<AtomStringImpl> AtomStringImpl::addSlowCase(AtomStringTable& stringTable, StringImpl& string)
>+{
>+ // This check is necessary for null symbols.
>+ // Their length is zero, but they are not AtomStringImpl.
>+ if (!string.length())
>+ return *static_cast<AtomStringImpl*>(StringImpl::empty());
>+
>+ if (string.isStatic()) {
>+ AtomStringTableLocker locker;
>+ return addStatic(locker, stringTable.table(), string);
>+ }
>+
>+ if (string.isSymbol()) {
>+ AtomStringTableLocker locker;
>+ return addSymbol(locker, stringTable.table(), string);
>+ }
>+
>+ ASSERT_WITH_MESSAGE(!string.isAtom(), "AtomStringImpl should not hit the slow case if the string is already atomic.");
>+
>+ AtomStringTableLocker locker;
>+ auto addResult = stringTable.table().add(&string);
>+
>+ if (addResult.isNewEntry) {
>+ ASSERT(*addResult.iterator == &string);
>+ string.setIsAtomic(true);
>+ }
>+
>+ return *static_cast<AtomStringImpl*>(*addResult.iterator);
>+}
>+
>+void AtomStringImpl::remove(AtomStringImpl* string)
>+{
>+ ASSERT(string->isAtom());
>+ AtomStringTableLocker locker;
>+ auto& atomStringTable = stringTable();
>+ auto iterator = atomStringTable.find(string);
>+ ASSERT_WITH_MESSAGE(iterator != atomStringTable.end(), "The string being removed is atomic in the string table of an other thread!");
>+ ASSERT(string == *iterator);
>+ atomStringTable.remove(iterator);
>+}
>+
>+RefPtr<AtomStringImpl> AtomStringImpl::lookUpSlowCase(StringImpl& string)
>+{
>+ ASSERT_WITH_MESSAGE(!string.isAtom(), "AtomicStringImpls should return from the fast case.");
>+
>+ if (!string.length())
>+ return static_cast<AtomStringImpl*>(StringImpl::empty());
>+
>+ AtomStringTableLocker locker;
>+ auto& atomStringTable = stringTable();
>+ auto iterator = atomStringTable.find(&string);
>+ if (iterator != atomStringTable.end())
>+ return static_cast<AtomStringImpl*>(*iterator);
>+ return nullptr;
>+}
>+
>+RefPtr<AtomStringImpl> AtomStringImpl::addUTF8(const char* charactersStart, const char* charactersEnd)
>+{
>+ HashAndUTF8Characters buffer;
>+ buffer.characters = charactersStart;
>+ buffer.hash = calculateStringHashAndLengthFromUTF8MaskingTop8Bits(charactersStart, charactersEnd, buffer.length, buffer.utf16Length);
>+
>+ if (!buffer.hash)
>+ return nullptr;
>+
>+ return addToStringTable<HashAndUTF8Characters, HashAndUTF8CharactersTranslator>(buffer);
>+}
>+
>+RefPtr<AtomStringImpl> AtomStringImpl::lookUp(const LChar* characters, unsigned length)
>+{
>+ AtomStringTableLocker locker;
>+ auto& table = stringTable();
>+
>+ LCharBuffer buffer = { characters, length };
>+ auto iterator = table.find<LCharBufferTranslator>(buffer);
>+ if (iterator != table.end())
>+ return static_cast<AtomStringImpl*>(*iterator);
>+ return nullptr;
>+}
>+
>+RefPtr<AtomStringImpl> AtomStringImpl::lookUp(const UChar* characters, unsigned length)
>+{
>+ AtomStringTableLocker locker;
>+ auto& table = stringTable();
>+
>+ UCharBuffer buffer { characters, length };
>+ auto iterator = table.find<UCharBufferTranslator>(buffer);
>+ if (iterator != table.end())
>+ return static_cast<AtomStringImpl*>(*iterator);
>+ return nullptr;
>+}
>+
>+#if !ASSERT_DISABLED
>+bool AtomStringImpl::isInAtomStringTable(StringImpl* string)
>+{
>+ AtomStringTableLocker locker;
>+ return stringTable().contains(string);
>+}
>+#endif
>+
>+} // namespace WTF
>diff --git a/Source/WTF/wtf/text/AtomStringImpl.h b/Source/WTF/wtf/text/AtomStringImpl.h
>new file mode 100644
>index 0000000000000000000000000000000000000000..3466a91bfabb25099826ec7e8033391a5b5419cd
>--- /dev/null
>+++ b/Source/WTF/wtf/text/AtomStringImpl.h
>@@ -0,0 +1,123 @@
>+/*
>+ * Copyright (C) 2006 Apple Inc.
>+ *
>+ * This library is free software; you can redistribute it and/or
>+ * modify it under the terms of the GNU Library General Public
>+ * License as published by the Free Software Foundation; either
>+ * version 2 of the License, or (at your option) any later version.
>+ *
>+ * This library is distributed in the hope that it will be useful,
>+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
>+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
>+ * Library General Public License for more details.
>+ *
>+ * You should have received a copy of the GNU Library General Public License
>+ * along with this library; see the file COPYING.LIB. If not, write to
>+ * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
>+ * Boston, MA 02110-1301, USA.
>+ *
>+ */
>+
>+#pragma once
>+
>+#include <wtf/text/UniquedStringImpl.h>
>+
>+namespace WTF {
>+
>+class AtomStringTable;
>+
>+class AtomStringImpl : public UniquedStringImpl {
>+public:
>+ WTF_EXPORT_PRIVATE static RefPtr<AtomStringImpl> lookUp(const LChar*, unsigned length);
>+ WTF_EXPORT_PRIVATE static RefPtr<AtomStringImpl> lookUp(const UChar*, unsigned length);
>+ static RefPtr<AtomStringImpl> lookUp(StringImpl* string)
>+ {
>+ if (!string || string->isAtom())
>+ return static_cast<AtomStringImpl*>(string);
>+ return lookUpSlowCase(*string);
>+ }
>+
>+ static void remove(AtomStringImpl*);
>+
>+ WTF_EXPORT_PRIVATE static RefPtr<AtomStringImpl> add(const LChar*);
>+ ALWAYS_INLINE static RefPtr<AtomStringImpl> add(const char* s) { return add(reinterpret_cast<const LChar*>(s)); };
>+ WTF_EXPORT_PRIVATE static RefPtr<AtomStringImpl> add(const LChar*, unsigned length);
>+ WTF_EXPORT_PRIVATE static RefPtr<AtomStringImpl> add(const UChar*, unsigned length);
>+ ALWAYS_INLINE static RefPtr<AtomStringImpl> add(const char* s, unsigned length) { return add(reinterpret_cast<const LChar*>(s), length); };
>+ WTF_EXPORT_PRIVATE static RefPtr<AtomStringImpl> add(const UChar*);
>+ WTF_EXPORT_PRIVATE static RefPtr<AtomStringImpl> add(StringImpl*, unsigned offset, unsigned length);
>+ ALWAYS_INLINE static RefPtr<AtomStringImpl> add(StringImpl* string)
>+ {
>+ if (!string)
>+ return static_cast<AtomStringImpl*>(string);
>+ return add(*string);
>+ }
>+ WTF_EXPORT_PRIVATE static RefPtr<AtomStringImpl> add(const StaticStringImpl*);
>+ WTF_EXPORT_PRIVATE static Ref<AtomStringImpl> addLiteral(const char* characters, unsigned length);
>+
>+ // Returns null if the input data contains an invalid UTF-8 sequence.
>+ static RefPtr<AtomStringImpl> addUTF8(const char* start, const char* end);
>+
>+#if USE(CF)
>+ WTF_EXPORT_PRIVATE static RefPtr<AtomStringImpl> add(CFStringRef);
>+#endif
>+
>+ template<typename StringTableProvider>
>+ ALWAYS_INLINE static RefPtr<AtomStringImpl> addWithStringTableProvider(StringTableProvider& stringTableProvider, StringImpl* string)
>+ {
>+ if (!string)
>+ return nullptr;
>+ return add(*stringTableProvider.atomStringTable(), *string);
>+ }
>+
>+#if !ASSERT_DISABLED
>+ WTF_EXPORT_PRIVATE static bool isInAtomStringTable(StringImpl*);
>+#endif
>+
>+private:
>+ AtomStringImpl() = delete;
>+
>+ ALWAYS_INLINE static Ref<AtomStringImpl> add(StringImpl& string)
>+ {
>+ if (string.isAtom()) {
>+ ASSERT_WITH_MESSAGE(!string.length() || isInAtomStringTable(&string), "The atomic string comes from an other thread!");
>+ return static_cast<AtomStringImpl&>(string);
>+ }
>+ return addSlowCase(string);
>+ }
>+
>+ ALWAYS_INLINE static Ref<AtomStringImpl> add(AtomStringTable& stringTable, StringImpl& string)
>+ {
>+ if (string.isAtom()) {
>+ ASSERT_WITH_MESSAGE(!string.length() || isInAtomStringTable(&string), "The atomic string comes from an other thread!");
>+ return static_cast<AtomStringImpl&>(string);
>+ }
>+ return addSlowCase(stringTable, string);
>+ }
>+
>+ WTF_EXPORT_PRIVATE static Ref<AtomStringImpl> addSlowCase(StringImpl&);
>+ WTF_EXPORT_PRIVATE static Ref<AtomStringImpl> addSlowCase(AtomStringTable&, StringImpl&);
>+
>+ WTF_EXPORT_PRIVATE static RefPtr<AtomStringImpl> lookUpSlowCase(StringImpl&);
>+};
>+
>+#if !ASSERT_DISABLED
>+// AtomicStringImpls created from StaticStringImpl will ASSERT
>+// in the generic ValueCheck<T>::checkConsistency
>+// as they are not allocated by fastMalloc.
>+// We don't currently have any way to detect that case
>+// so we ignore the consistency check for all AtomicStringImpls*.
>+template<> struct
>+ValueCheck<AtomStringImpl*> {
>+ static void checkConsistency(const AtomStringImpl*) { }
>+};
>+
>+template<> struct
>+ValueCheck<const AtomStringImpl*> {
>+ static void checkConsistency(const AtomStringImpl*) { }
>+};
>+#endif
>+
>+}
>+
>+using WTF::AtomStringImpl;
>diff --git a/Source/WTF/wtf/text/AtomStringTable.cpp b/Source/WTF/wtf/text/AtomStringTable.cpp
>new file mode 100644
>index 0000000000000000000000000000000000000000..9812ac229f5d4c4a6933e19f31cedba76d98cb2d
>--- /dev/null
>+++ b/Source/WTF/wtf/text/AtomStringTable.cpp
>@@ -0,0 +1,38 @@
>+/*
>+ * Copyright (C) 2004, 2005, 2006, 2007, 2008, 2013 Apple Inc. All rights reserved.
>+ * Copyright (C) 2010 Patrick Gansterer <paroga@paroga.com>
>+ * Copyright (C) 2012 Google Inc. All rights reserved.
>+ *
>+ * This library is free software; you can redistribute it and/or
>+ * modify it under the terms of the GNU Library General Public
>+ * License as published by the Free Software Foundation; either
>+ * version 2 of the License, or (at your option) any later version.
>+ *
>+ * This library is distributed in the hope that it will be useful,
>+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
>+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
>+ * Library General Public License for more details.
>+ *
>+ * You should have received a copy of the GNU Library General Public License
>+ * along with this library; see the file COPYING.LIB. If not, write to
>+ * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
>+ * Boston, MA 02110-1301, USA.
>+ *
>+ */
>+
>+#include "config.h"
>+#include <wtf/text/AtomStringTable.h>
>+
>+#include <wtf/HashSet.h>
>+#include <wtf/MainThread.h>
>+#include <wtf/Threading.h>
>+
>+namespace WTF {
>+
>+AtomStringTable::~AtomStringTable()
>+{
>+ for (auto* string : m_table)
>+ string->setIsAtomic(false);
>+}
>+
>+}
>diff --git a/Source/WTF/wtf/text/AtomStringTable.h b/Source/WTF/wtf/text/AtomStringTable.h
>new file mode 100644
>index 0000000000000000000000000000000000000000..24c60b1fb2d7e8fb8942e6503393e4847169569c
>--- /dev/null
>+++ b/Source/WTF/wtf/text/AtomStringTable.h
>@@ -0,0 +1,44 @@
>+/*
>+ * Copyright (C) 2004, 2005, 2006, 2007, 2008, 2013 Apple Inc. All rights reserved.
>+ * Copyright (C) 2010 Patrick Gansterer <paroga@paroga.com>
>+ * Copyright (C) 2012 Google Inc. All rights reserved.
>+ *
>+ * This library is free software; you can redistribute it and/or
>+ * modify it under the terms of the GNU Library General Public
>+ * License as published by the Free Software Foundation; either
>+ * version 2 of the License, or (at your option) any later version.
>+ *
>+ * This library is distributed in the hope that it will be useful,
>+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
>+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
>+ * Library General Public License for more details.
>+ *
>+ * You should have received a copy of the GNU Library General Public License
>+ * along with this library; see the file COPYING.LIB. If not, write to
>+ * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
>+ * Boston, MA 02110-1301, USA.
>+ *
>+ */
>+
>+#pragma once
>+
>+#include <wtf/HashSet.h>
>+#include <wtf/text/StringImpl.h>
>+
>+namespace WTF {
>+
>+class StringImpl;
>+
>+class AtomStringTable {
>+ WTF_MAKE_FAST_ALLOCATED;
>+public:
>+ WTF_EXPORT_PRIVATE ~AtomStringTable();
>+
>+ HashSet<StringImpl*>& table() { return m_table; }
>+
>+private:
>+ HashSet<StringImpl*> m_table;
>+};
>+
>+}
>+using WTF::AtomStringTable;
>diff --git a/Source/WTF/wtf/text/AtomicString.cpp b/Source/WTF/wtf/text/AtomicString.cpp
>deleted file mode 100644
>index ffdca7f9a76c0ca6df7c7a6d9c3912e7a57daad1..0000000000000000000000000000000000000000
>--- a/Source/WTF/wtf/text/AtomicString.cpp
>+++ /dev/null
>@@ -1,157 +0,0 @@
>-/*
>- * Copyright (C) 2004-2017 Apple Inc. All rights reserved.
>- * Copyright (C) 2010 Patrick Gansterer <paroga@paroga.com>
>- * Copyright (C) 2012 Google Inc. All rights reserved.
>- *
>- * This library is free software; you can redistribute it and/or
>- * modify it under the terms of the GNU Library General Public
>- * License as published by the Free Software Foundation; either
>- * version 2 of the License, or (at your option) any later version.
>- *
>- * This library is distributed in the hope that it will be useful,
>- * but WITHOUT ANY WARRANTY; without even the implied warranty of
>- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
>- * Library General Public License for more details.
>- *
>- * You should have received a copy of the GNU Library General Public License
>- * along with this library; see the file COPYING.LIB. If not, write to
>- * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
>- * Boston, MA 02110-1301, USA.
>- *
>- */
>-
>-#include "config.h"
>-#include <wtf/text/AtomicString.h>
>-
>-#include <mutex>
>-#include <wtf/MainThread.h>
>-#include <wtf/text/IntegerToStringConversion.h>
>-
>-#include <wtf/dtoa.h>
>-
>-namespace WTF {
>-
>-template<AtomicString::CaseConvertType type>
>-ALWAYS_INLINE AtomicString AtomicString::convertASCIICase() const
>-{
>- StringImpl* impl = this->impl();
>- if (UNLIKELY(!impl))
>- return nullAtom();
>-
>- // Convert short strings without allocating a new StringImpl, since
>- // there's a good chance these strings are already in the atomic
>- // string table and so no memory allocation will be required.
>- unsigned length;
>- const unsigned localBufferSize = 100;
>- if (impl->is8Bit() && (length = impl->length()) <= localBufferSize) {
>- const LChar* characters = impl->characters8();
>- unsigned failingIndex;
>- for (unsigned i = 0; i < length; ++i) {
>- if (type == CaseConvertType::Lower ? UNLIKELY(isASCIIUpper(characters[i])) : LIKELY(isASCIILower(characters[i]))) {
>- failingIndex = i;
>- goto SlowPath;
>- }
>- }
>- return *this;
>-SlowPath:
>- LChar localBuffer[localBufferSize];
>- for (unsigned i = 0; i < failingIndex; ++i)
>- localBuffer[i] = characters[i];
>- for (unsigned i = failingIndex; i < length; ++i)
>- localBuffer[i] = type == CaseConvertType::Lower ? toASCIILower(characters[i]) : toASCIIUpper(characters[i]);
>- return AtomicString(localBuffer, length);
>- }
>-
>- Ref<StringImpl> convertedString = type == CaseConvertType::Lower ? impl->convertToASCIILowercase() : impl->convertToASCIIUppercase();
>- if (LIKELY(convertedString.ptr() == impl))
>- return *this;
>-
>- AtomicString result;
>- result.m_string = AtomicStringImpl::add(convertedString.ptr());
>- return result;
>-}
>-
>-AtomicString AtomicString::convertToASCIILowercase() const
>-{
>- return convertASCIICase<CaseConvertType::Lower>();
>-}
>-
>-AtomicString AtomicString::convertToASCIIUppercase() const
>-{
>- return convertASCIICase<CaseConvertType::Upper>();
>-}
>-
>-AtomicString AtomicString::number(int number)
>-{
>- return numberToStringSigned<AtomicString>(number);
>-}
>-
>-AtomicString AtomicString::number(unsigned number)
>-{
>- return numberToStringUnsigned<AtomicString>(number);
>-}
>-
>-AtomicString AtomicString::number(unsigned long number)
>-{
>- return numberToStringUnsigned<AtomicString>(number);
>-}
>-
>-AtomicString AtomicString::number(unsigned long long number)
>-{
>- return numberToStringUnsigned<AtomicString>(number);
>-}
>-
>-AtomicString AtomicString::number(float number)
>-{
>- NumberToStringBuffer buffer;
>- return numberToString(number, buffer);
>-}
>-
>-AtomicString AtomicString::number(double number)
>-{
>- NumberToStringBuffer buffer;
>- return numberToString(number, buffer);
>-}
>-
>-AtomicString AtomicString::fromUTF8Internal(const char* start, const char* end)
>-{
>- ASSERT(start);
>-
>- // Caller needs to handle empty string.
>- ASSERT(!end || end > start);
>- ASSERT(end || start[0]);
>-
>- return AtomicStringImpl::addUTF8(start, end ? end : start + std::strlen(start));
>-}
>-
>-#ifndef NDEBUG
>-
>-void AtomicString::show() const
>-{
>- m_string.show();
>-}
>-
>-#endif
>-
>-WTF_EXPORT_PRIVATE LazyNeverDestroyed<AtomicString> nullAtomData;
>-WTF_EXPORT_PRIVATE LazyNeverDestroyed<AtomicString> emptyAtomData;
>-WTF_EXPORT_PRIVATE LazyNeverDestroyed<AtomicString> starAtomData;
>-WTF_EXPORT_PRIVATE LazyNeverDestroyed<AtomicString> xmlAtomData;
>-WTF_EXPORT_PRIVATE LazyNeverDestroyed<AtomicString> xmlnsAtomData;
>-
>-void AtomicString::init()
>-{
>- static std::once_flag initializeKey;
>- std::call_once(initializeKey, [] {
>- // Initialization is not thread safe, so this function must be called from the main thread first.
>- ASSERT(isUIThread());
>-
>- nullAtomData.construct();
>- emptyAtomData.construct("");
>- starAtomData.construct("*", AtomicString::ConstructFromLiteral);
>- xmlAtomData.construct("xml", AtomicString::ConstructFromLiteral);
>- xmlnsAtomData.construct("xmlns", AtomicString::ConstructFromLiteral);
>- });
>-}
>-
>-} // namespace WTF
>diff --git a/Source/WTF/wtf/text/AtomicString.h b/Source/WTF/wtf/text/AtomicString.h
>deleted file mode 100644
>index 12d0f6f81c13a7e0d482cd82062a6cf7974e5dab..0000000000000000000000000000000000000000
>--- a/Source/WTF/wtf/text/AtomicString.h
>+++ /dev/null
>@@ -1,377 +0,0 @@
>-/*
>- * Copyright (C) 2004-2017 Apple Inc. All rights reserved.
>- *
>- * This library is free software; you can redistribute it and/or
>- * modify it under the terms of the GNU Library General Public
>- * License as published by the Free Software Foundation; either
>- * version 2 of the License, or (at your option) any later version.
>- *
>- * This library is distributed in the hope that it will be useful,
>- * but WITHOUT ANY WARRANTY; without even the implied warranty of
>- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
>- * Library General Public License for more details.
>- *
>- * You should have received a copy of the GNU Library General Public License
>- * along with this library; see the file COPYING.LIB. If not, write to
>- * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
>- * Boston, MA 02110-1301, USA.
>- *
>- */
>-
>-#pragma once
>-
>-#include <utility>
>-#include <wtf/NeverDestroyed.h>
>-#include <wtf/text/AtomicStringImpl.h>
>-#include <wtf/text/IntegerToStringConversion.h>
>-#include <wtf/text/WTFString.h>
>-
>-#if OS(WINDOWS)
>-#include <wtf/text/win/WCharStringExtras.h>
>-#endif
>-
>-// Define 'NO_IMPLICIT_ATOMICSTRING' before including this header,
>-// to disallow (expensive) implicit String-->AtomicString conversions.
>-#ifdef NO_IMPLICIT_ATOMICSTRING
>-#define ATOMICSTRING_CONVERSION explicit
>-#else
>-#define ATOMICSTRING_CONVERSION
>-#endif
>-
>-namespace WTF {
>-
>-struct AtomicStringHash;
>-
>-class AtomicString {
>-public:
>- WTF_EXPORT_PRIVATE static void init();
>-
>- AtomicString();
>- AtomicString(const LChar*);
>- AtomicString(const char*);
>- AtomicString(const LChar*, unsigned length);
>- AtomicString(const UChar*, unsigned length);
>- AtomicString(const UChar*);
>-
>- template<size_t inlineCapacity>
>- explicit AtomicString(const Vector<UChar, inlineCapacity>& characters)
>- : m_string(AtomicStringImpl::add(characters.data(), characters.size()))
>- {
>- }
>-
>- AtomicString(AtomicStringImpl*);
>- AtomicString(RefPtr<AtomicStringImpl>&&);
>- AtomicString(const StaticStringImpl*);
>- ATOMICSTRING_CONVERSION AtomicString(StringImpl*);
>- ATOMICSTRING_CONVERSION AtomicString(const String&);
>- AtomicString(StringImpl* baseString, unsigned start, unsigned length);
>-
>- // FIXME: AtomicString doesnât always have AtomicStringImpl, so one of those two names needs to change..
>- AtomicString(UniquedStringImpl* uid);
>-
>- enum ConstructFromLiteralTag { ConstructFromLiteral };
>- AtomicString(const char* characters, unsigned length, ConstructFromLiteralTag)
>- : m_string(AtomicStringImpl::addLiteral(characters, length))
>- {
>- }
>-
>- template<unsigned characterCount> ALWAYS_INLINE AtomicString(const char (&characters)[characterCount], ConstructFromLiteralTag)
>- : m_string(AtomicStringImpl::addLiteral(characters, characterCount - 1))
>- {
>- COMPILE_ASSERT(characterCount > 1, AtomicStringFromLiteralNotEmpty);
>- COMPILE_ASSERT((characterCount - 1 <= ((unsigned(~0) - sizeof(StringImpl)) / sizeof(LChar))), AtomicStringFromLiteralCannotOverflow);
>- }
>-
>- // We have to declare the copy constructor and copy assignment operator as well, otherwise
>- // they'll be implicitly deleted by adding the move constructor and move assignment operator.
>- AtomicString(const AtomicString& other) : m_string(other.m_string) { }
>- AtomicString(AtomicString&& other) : m_string(WTFMove(other.m_string)) { }
>- AtomicString& operator=(const AtomicString& other) { m_string = other.m_string; return *this; }
>- AtomicString& operator=(AtomicString&& other) { m_string = WTFMove(other.m_string); return *this; }
>-
>- // Hash table deleted values, which are only constructed and never copied or destroyed.
>- AtomicString(WTF::HashTableDeletedValueType) : m_string(WTF::HashTableDeletedValue) { }
>- bool isHashTableDeletedValue() const { return m_string.isHashTableDeletedValue(); }
>-
>- unsigned existingHash() const { return isNull() ? 0 : impl()->existingHash(); }
>-
>- operator const String&() const { return m_string; }
>- const String& string() const { return m_string; };
>-
>- AtomicStringImpl* impl() const { return static_cast<AtomicStringImpl *>(m_string.impl()); }
>-
>- bool is8Bit() const { return m_string.is8Bit(); }
>- const LChar* characters8() const { return m_string.characters8(); }
>- const UChar* characters16() const { return m_string.characters16(); }
>- unsigned length() const { return m_string.length(); }
>-
>- UChar operator[](unsigned int i) const { return m_string[i]; }
>-
>- WTF_EXPORT_PRIVATE static AtomicString number(int);
>- WTF_EXPORT_PRIVATE static AtomicString number(unsigned);
>- WTF_EXPORT_PRIVATE static AtomicString number(unsigned long);
>- WTF_EXPORT_PRIVATE static AtomicString number(unsigned long long);
>- WTF_EXPORT_PRIVATE static AtomicString number(float);
>- WTF_EXPORT_PRIVATE static AtomicString number(double);
>- // If we need more overloads of the number function, we can add all the others that String has, but these seem to do for now.
>-
>- bool contains(UChar character) const { return m_string.contains(character); }
>- bool contains(const LChar* string) const { return m_string.contains(string); }
>- bool contains(const String& string) const { return m_string.contains(string); }
>- bool containsIgnoringASCIICase(const String& string) const { return m_string.containsIgnoringASCIICase(string); }
>-
>- size_t find(UChar character, unsigned start = 0) const { return m_string.find(character, start); }
>- size_t find(const LChar* string, unsigned start = 0) const { return m_string.find(string, start); }
>- size_t find(const String& string, unsigned start = 0) const { return m_string.find(string, start); }
>- size_t findIgnoringASCIICase(const String& string) const { return m_string.findIgnoringASCIICase(string); }
>- size_t findIgnoringASCIICase(const String& string, unsigned startOffset) const { return m_string.findIgnoringASCIICase(string, startOffset); }
>- size_t find(CodeUnitMatchFunction matchFunction, unsigned start = 0) const { return m_string.find(matchFunction, start); }
>-
>- bool startsWith(const String& string) const { return m_string.startsWith(string); }
>- bool startsWithIgnoringASCIICase(const String& string) const { return m_string.startsWithIgnoringASCIICase(string); }
>- bool startsWith(UChar character) const { return m_string.startsWith(character); }
>- template<unsigned matchLength> bool startsWith(const char (&prefix)[matchLength]) const { return m_string.startsWith<matchLength>(prefix); }
>-
>- bool endsWith(const String& string) const { return m_string.endsWith(string); }
>- bool endsWithIgnoringASCIICase(const String& string) const { return m_string.endsWithIgnoringASCIICase(string); }
>- bool endsWith(UChar character) const { return m_string.endsWith(character); }
>- template<unsigned matchLength> bool endsWith(const char (&prefix)[matchLength]) const { return m_string.endsWith<matchLength>(prefix); }
>-
>- WTF_EXPORT_PRIVATE AtomicString convertToASCIILowercase() const;
>- WTF_EXPORT_PRIVATE AtomicString convertToASCIIUppercase() const;
>-
>- int toInt(bool* ok = 0) const { return m_string.toInt(ok); }
>- double toDouble(bool* ok = 0) const { return m_string.toDouble(ok); }
>- float toFloat(bool* ok = 0) const { return m_string.toFloat(ok); }
>- bool percentage(int& p) const { return m_string.percentage(p); }
>-
>- bool isNull() const { return m_string.isNull(); }
>- bool isEmpty() const { return m_string.isEmpty(); }
>-
>-#if USE(CF)
>- AtomicString(CFStringRef);
>-#endif
>-
>-#ifdef __OBJC__
>- AtomicString(NSString*);
>- operator NSString*() const { return m_string; }
>-#endif
>-
>-#if OS(WINDOWS) && U_ICU_VERSION_MAJOR_NUM >= 59
>- AtomicString(const wchar_t* characters, unsigned length)
>- : AtomicString(ucharFrom(characters), length) { }
>-
>- AtomicString(const wchar_t* characters)
>- : AtomicString(ucharFrom(characters)) { }
>-#endif
>-
>- // AtomicString::fromUTF8 will return a null string if the input data contains invalid UTF-8 sequences.
>- static AtomicString fromUTF8(const char*, size_t);
>- static AtomicString fromUTF8(const char*);
>-
>-#ifndef NDEBUG
>- void show() const;
>-#endif
>-
>-private:
>- // The explicit constructors with AtomicString::ConstructFromLiteral must be used for literals.
>- AtomicString(ASCIILiteral);
>-
>- enum class CaseConvertType { Upper, Lower };
>- template<CaseConvertType> AtomicString convertASCIICase() const;
>-
>- WTF_EXPORT_PRIVATE static AtomicString fromUTF8Internal(const char*, const char*);
>-
>- String m_string;
>-};
>-
>-static_assert(sizeof(AtomicString) == sizeof(String), "AtomicString and String must be same size!");
>-
>-inline bool operator==(const AtomicString& a, const AtomicString& b) { return a.impl() == b.impl(); }
>-bool operator==(const AtomicString&, const LChar*);
>-inline bool operator==(const AtomicString& a, const char* b) { return WTF::equal(a.impl(), reinterpret_cast<const LChar*>(b)); }
>-inline bool operator==(const AtomicString& a, const Vector<UChar>& b) { return a.impl() && equal(a.impl(), b.data(), b.size()); } 
>-inline bool operator==(const AtomicString& a, const String& b) { return equal(a.impl(), b.impl()); }
>-inline bool operator==(const LChar* a, const AtomicString& b) { return b == a; }
>-inline bool operator==(const String& a, const AtomicString& b) { return equal(a.impl(), b.impl()); }
>-inline bool operator==(const Vector<UChar>& a, const AtomicString& b) { return b == a; }
>-
>-inline bool operator!=(const AtomicString& a, const AtomicString& b) { return a.impl() != b.impl(); }
>-inline bool operator!=(const AtomicString& a, const LChar* b) { return !(a == b); }
>-inline bool operator!=(const AtomicString& a, const char* b) { return !(a == b); }
>-inline bool operator!=(const AtomicString& a, const String& b) { return !equal(a.impl(), b.impl()); }
>-inline bool operator!=(const AtomicString& a, const Vector<UChar>& b) { return !(a == b); }
>-inline bool operator!=(const LChar* a, const AtomicString& b) { return !(b == a); }
>-inline bool operator!=(const String& a, const AtomicString& b) { return !equal(a.impl(), b.impl()); }
>-inline bool operator!=(const Vector<UChar>& a, const AtomicString& b) { return !(a == b); }
>-
>-bool equalIgnoringASCIICase(const AtomicString&, const AtomicString&);
>-bool equalIgnoringASCIICase(const AtomicString&, const String&);
>-bool equalIgnoringASCIICase(const String&, const AtomicString&);
>-bool equalIgnoringASCIICase(const AtomicString&, const char*);
>-
>-template<unsigned length> bool equalLettersIgnoringASCIICase(const AtomicString&, const char (&lowercaseLetters)[length]);
>-
>-inline AtomicString::AtomicString()
>-{
>-}
>-
>-inline AtomicString::AtomicString(const LChar* string)
>- : m_string(AtomicStringImpl::add(string))
>-{
>-}
>-
>-inline AtomicString::AtomicString(const char* string)
>- : m_string(AtomicStringImpl::add(string))
>-{
>-}
>-
>-inline AtomicString::AtomicString(const LChar* string, unsigned length)
>- : m_string(AtomicStringImpl::add(string, length))
>-{
>-}
>-
>-inline AtomicString::AtomicString(const UChar* string, unsigned length)
>- : m_string(AtomicStringImpl::add(string, length))
>-{
>-}
>-
>-inline AtomicString::AtomicString(const UChar* string)
>- : m_string(AtomicStringImpl::add(string))
>-{
>-}
>-
>-inline AtomicString::AtomicString(AtomicStringImpl* string)
>- : m_string(string)
>-{
>-}
>-
>-inline AtomicString::AtomicString(RefPtr<AtomicStringImpl>&& string)
>- : m_string(WTFMove(string))
>-{
>-}
>-
>-inline AtomicString::AtomicString(StringImpl* string)
>- : m_string(AtomicStringImpl::add(string))
>-{
>-}
>-
>-inline AtomicString::AtomicString(const StaticStringImpl* string)
>- : m_string(AtomicStringImpl::add(string))
>-{
>-}
>-
>-inline AtomicString::AtomicString(const String& string)
>- : m_string(AtomicStringImpl::add(string.impl()))
>-{
>-}
>-
>-inline AtomicString::AtomicString(StringImpl* baseString, unsigned start, unsigned length)
>- : m_string(AtomicStringImpl::add(baseString, start, length))
>-{
>-}
>-
>-inline AtomicString::AtomicString(UniquedStringImpl* uid)
>- : m_string(uid)
>-{
>-}
>-
>-#if USE(CF)
>-
>-inline AtomicString::AtomicString(CFStringRef string)
>- : m_string(AtomicStringImpl::add(string))
>-{
>-}
>-
>-#endif
>-
>-#ifdef __OBJC__
>-
>-inline AtomicString::AtomicString(NSString* string)
>- : m_string(AtomicStringImpl::add((__bridge CFStringRef)string))
>-{
>-}
>-
>-#endif
>-
>-// Define external global variables for the commonly used atomic strings.
>-// These are only usable from the main thread.
>-extern WTF_EXPORT_PRIVATE LazyNeverDestroyed<AtomicString> nullAtomData;
>-extern WTF_EXPORT_PRIVATE LazyNeverDestroyed<AtomicString> emptyAtomData;
>-extern WTF_EXPORT_PRIVATE LazyNeverDestroyed<AtomicString> starAtomData;
>-extern WTF_EXPORT_PRIVATE LazyNeverDestroyed<AtomicString> xmlAtomData;
>-extern WTF_EXPORT_PRIVATE LazyNeverDestroyed<AtomicString> xmlnsAtomData;
>-
>-inline const AtomicString& nullAtom() { return nullAtomData.get(); }
>-inline const AtomicString& emptyAtom() { return emptyAtomData.get(); }
>-inline const AtomicString& starAtom() { return starAtomData.get(); }
>-inline const AtomicString& xmlAtom() { return xmlAtomData.get(); }
>-inline const AtomicString& xmlnsAtom() { return xmlnsAtomData.get(); }
>-
>-inline AtomicString AtomicString::fromUTF8(const char* characters, size_t length)
>-{
>- if (!characters)
>- return nullAtom();
>- if (!length)
>- return emptyAtom();
>- return fromUTF8Internal(characters, characters + length);
>-}
>-
>-inline AtomicString AtomicString::fromUTF8(const char* characters)
>-{
>- if (!characters)
>- return nullAtom();
>- if (!*characters)
>- return emptyAtom();
>- return fromUTF8Internal(characters, nullptr);
>-}
>-
>-// AtomicStringHash is the default hash for AtomicString
>-template<typename T> struct DefaultHash;
>-template<> struct DefaultHash<AtomicString> {
>- typedef AtomicStringHash Hash;
>-};
>-
>-template<unsigned length> inline bool equalLettersIgnoringASCIICase(const AtomicString& string, const char (&lowercaseLetters)[length])
>-{
>- return equalLettersIgnoringASCIICase(string.string(), lowercaseLetters);
>-}
>-
>-inline bool equalIgnoringASCIICase(const AtomicString& a, const AtomicString& b)
>-{
>- return equalIgnoringASCIICase(a.string(), b.string());
>-}
>-
>-inline bool equalIgnoringASCIICase(const AtomicString& a, const String& b)
>-{
>- return equalIgnoringASCIICase(a.string(), b);
>-}
>-
>-inline bool equalIgnoringASCIICase(const String& a, const AtomicString& b)
>-{
>- return equalIgnoringASCIICase(a, b.string());
>-}
>-
>-inline bool equalIgnoringASCIICase(const AtomicString& a, const char* b)
>-{
>- return equalIgnoringASCIICase(a.string(), b);
>-}
>-
>-template<> struct IntegerToStringConversionTrait<AtomicString> {
>- using ReturnType = AtomicString;
>- using AdditionalArgumentType = void;
>- static AtomicString flush(LChar* characters, unsigned length, void*) { return { characters, length }; }
>-};
>-
>-} // namespace WTF
>-
>-#ifndef ATOMICSTRING_HIDE_GLOBALS
>-using WTF::AtomicString;
>-using WTF::nullAtom;
>-using WTF::emptyAtom;
>-using WTF::starAtom;
>-using WTF::xmlAtom;
>-using WTF::xmlnsAtom;
>-#endif
>-
>-#include <wtf/text/StringConcatenate.h>
>diff --git a/Source/WTF/wtf/text/AtomicStringHash.h b/Source/WTF/wtf/text/AtomicStringHash.h
>deleted file mode 100644
>index f2b7d2e165d0640659acfa2ae65a288ee15bf516..0000000000000000000000000000000000000000
>--- a/Source/WTF/wtf/text/AtomicStringHash.h
>+++ /dev/null
>@@ -1,68 +0,0 @@
>-/*
>- * Copyright (C) 2008 Apple Inc. All rights reserved.
>- *
>- * Redistribution and use in source and binary forms, with or without
>- * modification, are permitted provided that the following conditions
>- * are met:
>- *
>- * 1. Redistributions of source code must retain the above copyright
>- * notice, this list of conditions and the following disclaimer. 
>- * 2. Redistributions in binary form must reproduce the above copyright
>- * notice, this list of conditions and the following disclaimer in the
>- * documentation and/or other materials provided with the distribution. 
>- * 3. Neither the name of Apple Inc. ("Apple") nor the names of
>- * its contributors may be used to endorse or promote products derived
>- * from this software without specific prior written permission. 
>- *
>- * THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "AS IS" AND ANY
>- * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
>- * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
>- * DISCLAIMED. IN NO EVENT SHALL APPLE OR ITS CONTRIBUTORS BE LIABLE FOR ANY
>- * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
>- * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
>- * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
>- * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
>- * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
>- * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
>- */
>-
>-#pragma once
>-
>-#include <wtf/text/AtomicString.h>
>-#include <wtf/HashTraits.h>
>-
>-namespace WTF {
>-
>- struct AtomicStringHash {
>- static unsigned hash(const AtomicString& key)
>- {
>- return key.impl()->existingHash();
>- }
>-
>- static bool equal(const AtomicString& a, const AtomicString& b)
>- {
>- return a == b;
>- }
>-
>- static const bool safeToCompareToEmptyOrDeleted = false;
>- };
>-
>- template<> struct HashTraits<WTF::AtomicString> : SimpleClassHashTraits<WTF::AtomicString> {
>- static const bool hasIsEmptyValueFunction = true;
>- static bool isEmptyValue(const AtomicString& value)
>- {
>- return value.isNull();
>- }
>-
>- static void customDeleteBucket(AtomicString& value)
>- {
>- // See unique_ptr's customDeleteBucket() for an explanation.
>- ASSERT(!isDeletedValue(value));
>- AtomicString valueToBeDestroyed = WTFMove(value);
>- constructDeletedValue(value);
>- }
>- };
>-
>-}
>-
>-using WTF::AtomicStringHash;
>diff --git a/Source/WTF/wtf/text/AtomicStringImpl.cpp b/Source/WTF/wtf/text/AtomicStringImpl.cpp
>deleted file mode 100644
>index 601feb5fd33130bec46050236e2ec41d809c4fef..0000000000000000000000000000000000000000
>--- a/Source/WTF/wtf/text/AtomicStringImpl.cpp
>+++ /dev/null
>@@ -1,553 +0,0 @@
>-/*
>- * Copyright (C) 2004-2008, 2013-2014 Apple Inc. All rights reserved.
>- * Copyright (C) 2010 Patrick Gansterer <paroga@paroga.com>
>- * Copyright (C) 2012 Google Inc. All rights reserved.
>- * Copyright (C) 2015 Yusuke Suzuki<utatane.tea@gmail.com>. All rights reserved.
>- *
>- * This library is free software; you can redistribute it and/or
>- * modify it under the terms of the GNU Library General Public
>- * License as published by the Free Software Foundation; either
>- * version 2 of the License, or (at your option) any later version.
>- *
>- * This library is distributed in the hope that it will be useful,
>- * but WITHOUT ANY WARRANTY; without even the implied warranty of
>- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
>- * Library General Public License for more details.
>- *
>- * You should have received a copy of the GNU Library General Public License
>- * along with this library; see the file COPYING.LIB. If not, write to
>- * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
>- * Boston, MA 02110-1301, USA.
>- *
>- */
>-
>-#include "config.h"
>-#include <wtf/text/AtomicStringImpl.h>
>-
>-#include <wtf/CommaPrinter.h>
>-#include <wtf/DataLog.h>
>-#include <wtf/HashSet.h>
>-#include <wtf/StringPrintStream.h>
>-#include <wtf/Threading.h>
>-#include <wtf/text/AtomicStringTable.h>
>-#include <wtf/text/IntegerToStringConversion.h>
>-#include <wtf/text/StringHash.h>
>-#include <wtf/unicode/UTF8Conversion.h>
>-
>-#if USE(WEB_THREAD)
>-#include <wtf/Lock.h>
>-#endif
>-
>-namespace WTF {
>-
>-using namespace Unicode;
>-
>-#if USE(WEB_THREAD)
>-
>-class AtomicStringTableLocker : public LockHolder {
>- WTF_MAKE_NONCOPYABLE(AtomicStringTableLocker);
>-
>- static Lock s_stringTableLock;
>-public:
>- AtomicStringTableLocker()
>- : LockHolder(&s_stringTableLock)
>- {
>- }
>-};
>-
>-Lock AtomicStringTableLocker::s_stringTableLock;
>-
>-#else
>-
>-class AtomicStringTableLocker {
>- WTF_MAKE_NONCOPYABLE(AtomicStringTableLocker);
>-public:
>- AtomicStringTableLocker() { }
>-};
>-
>-#endif // USE(WEB_THREAD)
>-
>-using StringTableImpl = HashSet<StringImpl*>;
>-
>-static ALWAYS_INLINE StringTableImpl& stringTable()
>-{
>- return Thread::current().atomicStringTable()->table();
>-}
>-
>-template<typename T, typename HashTranslator>
>-static inline Ref<AtomicStringImpl> addToStringTable(AtomicStringTableLocker&, StringTableImpl& atomicStringTable, const T& value)
>-{
>- auto addResult = atomicStringTable.add<HashTranslator>(value);
>-
>- // If the string is newly-translated, then we need to adopt it.
>- // The boolean in the pair tells us if that is so.
>- if (addResult.isNewEntry)
>- return adoptRef(static_cast<AtomicStringImpl&>(**addResult.iterator));
>- return *static_cast<AtomicStringImpl*>(*addResult.iterator);
>-}
>-
>-template<typename T, typename HashTranslator>
>-static inline Ref<AtomicStringImpl> addToStringTable(const T& value)
>-{
>- AtomicStringTableLocker locker;
>- return addToStringTable<T, HashTranslator>(locker, stringTable(), value);
>-}
>-
>-struct CStringTranslator {
>- static unsigned hash(const LChar* characters)
>- {
>- return StringHasher::computeHashAndMaskTop8Bits(characters);
>- }
>-
>- static inline bool equal(StringImpl* str, const LChar* characters)
>- {
>- return WTF::equal(str, characters);
>- }
>-
>- static void translate(StringImpl*& location, const LChar* const& characters, unsigned hash)
>- {
>- location = &StringImpl::create(characters).leakRef();
>- location->setHash(hash);
>- location->setIsAtomic(true);
>- }
>-};
>-
>-RefPtr<AtomicStringImpl> AtomicStringImpl::add(const LChar* characters)
>-{
>- if (!characters)
>- return nullptr;
>- if (!*characters)
>- return static_cast<AtomicStringImpl*>(StringImpl::empty());
>-
>- return addToStringTable<const LChar*, CStringTranslator>(characters);
>-}
>-
>-template<typename CharacterType>
>-struct HashTranslatorCharBuffer {
>- const CharacterType* characters;
>- unsigned length;
>- unsigned hash;
>-
>- HashTranslatorCharBuffer(const CharacterType* characters, unsigned length)
>- : characters(characters)
>- , length(length)
>- , hash(StringHasher::computeHashAndMaskTop8Bits(characters, length))
>- {
>- }
>-
>- HashTranslatorCharBuffer(const CharacterType* characters, unsigned length, unsigned hash)
>- : characters(characters)
>- , length(length)
>- , hash(hash)
>- {
>- }
>-};
>-
>-using UCharBuffer = HashTranslatorCharBuffer<UChar>;
>-struct UCharBufferTranslator {
>- static unsigned hash(const UCharBuffer& buf)
>- {
>- return buf.hash;
>- }
>-
>- static bool equal(StringImpl* const& str, const UCharBuffer& buf)
>- {
>- return WTF::equal(str, buf.characters, buf.length);
>- }
>-
>- static void translate(StringImpl*& location, const UCharBuffer& buf, unsigned hash)
>- {
>- location = &StringImpl::create8BitIfPossible(buf.characters, buf.length).leakRef();
>- location->setHash(hash);
>- location->setIsAtomic(true);
>- }
>-};
>-
>-struct HashAndUTF8Characters {
>- unsigned hash;
>- const char* characters;
>- unsigned length;
>- unsigned utf16Length;
>-};
>-
>-struct HashAndUTF8CharactersTranslator {
>- static unsigned hash(const HashAndUTF8Characters& buffer)
>- {
>- return buffer.hash;
>- }
>-
>- static bool equal(StringImpl* const& string, const HashAndUTF8Characters& buffer)
>- {
>- if (buffer.utf16Length != string->length())
>- return false;
>-
>- // If buffer contains only ASCII characters UTF-8 and UTF16 length are the same.
>- if (buffer.utf16Length != buffer.length) {
>- if (string->is8Bit())
>- return equalLatin1WithUTF8(string->characters8(), buffer.characters, buffer.characters + buffer.length);
>-
>- return equalUTF16WithUTF8(string->characters16(), buffer.characters, buffer.characters + buffer.length);
>- }
>-
>- if (string->is8Bit()) {
>- const LChar* stringCharacters = string->characters8();
>-
>- for (unsigned i = 0; i < buffer.length; ++i) {
>- ASSERT(isASCII(buffer.characters[i]));
>- if (stringCharacters[i] != buffer.characters[i])
>- return false;
>- }
>-
>- return true;
>- }
>-
>- const UChar* stringCharacters = string->characters16();
>-
>- for (unsigned i = 0; i < buffer.length; ++i) {
>- ASSERT(isASCII(buffer.characters[i]));
>- if (stringCharacters[i] != buffer.characters[i])
>- return false;
>- }
>-
>- return true;
>- }
>-
>- static void translate(StringImpl*& location, const HashAndUTF8Characters& buffer, unsigned hash)
>- {
>- UChar* target;
>- auto newString = StringImpl::createUninitialized(buffer.utf16Length, target);
>-
>- bool isAllASCII;
>- const char* source = buffer.characters;
>- if (!convertUTF8ToUTF16(source, source + buffer.length, &target, target + buffer.utf16Length, &isAllASCII))
>- ASSERT_NOT_REACHED();
>-
>- if (isAllASCII)
>- newString = StringImpl::create(buffer.characters, buffer.length);
>-
>- location = &newString.leakRef();
>- location->setHash(hash);
>- location->setIsAtomic(true);
>- }
>-};
>-
>-RefPtr<AtomicStringImpl> AtomicStringImpl::add(const UChar* characters, unsigned length)
>-{
>- if (!characters)
>- return nullptr;
>-
>- if (!length)
>- return static_cast<AtomicStringImpl*>(StringImpl::empty());
>-
>- UCharBuffer buffer { characters, length };
>- return addToStringTable<UCharBuffer, UCharBufferTranslator>(buffer);
>-}
>-
>-RefPtr<AtomicStringImpl> AtomicStringImpl::add(const UChar* characters)
>-{
>- if (!characters)
>- return nullptr;
>-
>- unsigned length = 0;
>- while (characters[length] != UChar(0))
>- ++length;
>-
>- if (!length)
>- return static_cast<AtomicStringImpl*>(StringImpl::empty());
>-
>- UCharBuffer buffer { characters, length };
>- return addToStringTable<UCharBuffer, UCharBufferTranslator>(buffer);
>-}
>-
>-struct SubstringLocation {
>- StringImpl* baseString;
>- unsigned start;
>- unsigned length;
>-};
>-
>-struct SubstringTranslator {
>- static void translate(StringImpl*& location, const SubstringLocation& buffer, unsigned hash)
>- {
>- location = &StringImpl::createSubstringSharingImpl(*buffer.baseString, buffer.start, buffer.length).leakRef();
>- location->setHash(hash);
>- location->setIsAtomic(true);
>- }
>-};
>-
>-struct SubstringTranslator8 : SubstringTranslator {
>- static unsigned hash(const SubstringLocation& buffer)
>- {
>- return StringHasher::computeHashAndMaskTop8Bits(buffer.baseString->characters8() + buffer.start, buffer.length);
>- }
>-
>- static bool equal(StringImpl* const& string, const SubstringLocation& buffer)
>- {
>- return WTF::equal(string, buffer.baseString->characters8() + buffer.start, buffer.length);
>- }
>-};
>-
>-struct SubstringTranslator16 : SubstringTranslator {
>- static unsigned hash(const SubstringLocation& buffer)
>- {
>- return StringHasher::computeHashAndMaskTop8Bits(buffer.baseString->characters16() + buffer.start, buffer.length);
>- }
>-
>- static bool equal(StringImpl* const& string, const SubstringLocation& buffer)
>- {
>- return WTF::equal(string, buffer.baseString->characters16() + buffer.start, buffer.length);
>- }
>-};
>-
>-RefPtr<AtomicStringImpl> AtomicStringImpl::add(StringImpl* baseString, unsigned start, unsigned length)
>-{
>- if (!baseString)
>- return nullptr;
>-
>- if (!length || start >= baseString->length())
>- return static_cast<AtomicStringImpl*>(StringImpl::empty());
>-
>- unsigned maxLength = baseString->length() - start;
>- if (length >= maxLength) {
>- if (!start)
>- return add(baseString);
>- length = maxLength;
>- }
>-
>- SubstringLocation buffer = { baseString, start, length };
>- if (baseString->is8Bit())
>- return addToStringTable<SubstringLocation, SubstringTranslator8>(buffer);
>- return addToStringTable<SubstringLocation, SubstringTranslator16>(buffer);
>-}
>- 
>-using LCharBuffer = HashTranslatorCharBuffer<LChar>;
>-struct LCharBufferTranslator {
>- static unsigned hash(const LCharBuffer& buf)
>- {
>- return buf.hash;
>- }
>-
>- static bool equal(StringImpl* const& str, const LCharBuffer& buf)
>- {
>- return WTF::equal(str, buf.characters, buf.length);
>- }
>-
>- static void translate(StringImpl*& location, const LCharBuffer& buf, unsigned hash)
>- {
>- location = &StringImpl::create(buf.characters, buf.length).leakRef();
>- location->setHash(hash);
>- location->setIsAtomic(true);
>- }
>-};
>-
>-template<typename CharType>
>-struct BufferFromStaticDataTranslator {
>- using Buffer = HashTranslatorCharBuffer<CharType>;
>- static unsigned hash(const Buffer& buf)
>- {
>- return buf.hash;
>- }
>-
>- static bool equal(StringImpl* const& str, const Buffer& buf)
>- {
>- return WTF::equal(str, buf.characters, buf.length);
>- }
>-
>- static void translate(StringImpl*& location, const Buffer& buf, unsigned hash)
>- {
>- location = &StringImpl::createWithoutCopying(buf.characters, buf.length).leakRef();
>- location->setHash(hash);
>- location->setIsAtomic(true);
>- }
>-};
>-
>-RefPtr<AtomicStringImpl> AtomicStringImpl::add(const LChar* characters, unsigned length)
>-{
>- if (!characters)
>- return nullptr;
>-
>- if (!length)
>- return static_cast<AtomicStringImpl*>(StringImpl::empty());
>-
>- LCharBuffer buffer { characters, length };
>- return addToStringTable<LCharBuffer, LCharBufferTranslator>(buffer);
>-}
>-
>-Ref<AtomicStringImpl> AtomicStringImpl::addLiteral(const char* characters, unsigned length)
>-{
>- ASSERT(characters);
>- ASSERT(length);
>-
>- LCharBuffer buffer { reinterpret_cast<const LChar*>(characters), length };
>- return addToStringTable<LCharBuffer, BufferFromStaticDataTranslator<LChar>>(buffer);
>-}
>-
>-static Ref<AtomicStringImpl> addSymbol(AtomicStringTableLocker& locker, StringTableImpl& atomicStringTable, StringImpl& base)
>-{
>- ASSERT(base.length());
>- ASSERT(base.isSymbol());
>-
>- SubstringLocation buffer = { &base, 0, base.length() };
>- if (base.is8Bit())
>- return addToStringTable<SubstringLocation, SubstringTranslator8>(locker, atomicStringTable, buffer);
>- return addToStringTable<SubstringLocation, SubstringTranslator16>(locker, atomicStringTable, buffer);
>-}
>-
>-static inline Ref<AtomicStringImpl> addSymbol(StringImpl& base)
>-{
>- AtomicStringTableLocker locker;
>- return addSymbol(locker, stringTable(), base);
>-}
>-
>-static Ref<AtomicStringImpl> addStatic(AtomicStringTableLocker& locker, StringTableImpl& atomicStringTable, const StringImpl& base)
>-{
>- ASSERT(base.length());
>- ASSERT(base.isStatic());
>-
>- if (base.is8Bit()) {
>- LCharBuffer buffer { base.characters8(), base.length(), base.hash() };
>- return addToStringTable<LCharBuffer, BufferFromStaticDataTranslator<LChar>>(locker, atomicStringTable, buffer);
>- }
>- UCharBuffer buffer { base.characters16(), base.length(), base.hash() };
>- return addToStringTable<UCharBuffer, BufferFromStaticDataTranslator<UChar>>(locker, atomicStringTable, buffer);
>-}
>-
>-static inline Ref<AtomicStringImpl> addStatic(const StringImpl& base)
>-{
>- AtomicStringTableLocker locker;
>- return addStatic(locker, stringTable(), base);
>-}
>-
>-RefPtr<AtomicStringImpl> AtomicStringImpl::add(const StaticStringImpl* string)
>-{
>- auto s = reinterpret_cast<const StringImpl*>(string);
>- ASSERT(s->isStatic());
>- return addStatic(*s);
>-}
>-
>-Ref<AtomicStringImpl> AtomicStringImpl::addSlowCase(StringImpl& string)
>-{
>- // This check is necessary for null symbols.
>- // Their length is zero, but they are not AtomicStringImpl.
>- if (!string.length())
>- return *static_cast<AtomicStringImpl*>(StringImpl::empty());
>-
>- if (string.isStatic())
>- return addStatic(string);
>-
>- if (string.isSymbol())
>- return addSymbol(string);
>-
>- ASSERT_WITH_MESSAGE(!string.isAtomic(), "AtomicStringImpl should not hit the slow case if the string is already atomic.");
>-
>- AtomicStringTableLocker locker;
>- auto addResult = stringTable().add(&string);
>-
>- if (addResult.isNewEntry) {
>- ASSERT(*addResult.iterator == &string);
>- string.setIsAtomic(true);
>- }
>-
>- return *static_cast<AtomicStringImpl*>(*addResult.iterator);
>-}
>-
>-Ref<AtomicStringImpl> AtomicStringImpl::addSlowCase(AtomicStringTable& stringTable, StringImpl& string)
>-{
>- // This check is necessary for null symbols.
>- // Their length is zero, but they are not AtomicStringImpl.
>- if (!string.length())
>- return *static_cast<AtomicStringImpl*>(StringImpl::empty());
>-
>- if (string.isStatic()) {
>- AtomicStringTableLocker locker;
>- return addStatic(locker, stringTable.table(), string);
>- }
>-
>- if (string.isSymbol()) {
>- AtomicStringTableLocker locker;
>- return addSymbol(locker, stringTable.table(), string);
>- }
>-
>- ASSERT_WITH_MESSAGE(!string.isAtomic(), "AtomicStringImpl should not hit the slow case if the string is already atomic.");
>-
>- AtomicStringTableLocker locker;
>- auto addResult = stringTable.table().add(&string);
>-
>- if (addResult.isNewEntry) {
>- ASSERT(*addResult.iterator == &string);
>- string.setIsAtomic(true);
>- }
>-
>- return *static_cast<AtomicStringImpl*>(*addResult.iterator);
>-}
>-
>-void AtomicStringImpl::remove(AtomicStringImpl* string)
>-{
>- ASSERT(string->isAtomic());
>- AtomicStringTableLocker locker;
>- auto& atomicStringTable = stringTable();
>- auto iterator = atomicStringTable.find(string);
>- ASSERT_WITH_MESSAGE(iterator != atomicStringTable.end(), "The string being removed is atomic in the string table of an other thread!");
>- ASSERT(string == *iterator);
>- atomicStringTable.remove(iterator);
>-}
>-
>-RefPtr<AtomicStringImpl> AtomicStringImpl::lookUpSlowCase(StringImpl& string)
>-{
>- ASSERT_WITH_MESSAGE(!string.isAtomic(), "AtomicStringImpls should return from the fast case.");
>-
>- if (!string.length())
>- return static_cast<AtomicStringImpl*>(StringImpl::empty());
>-
>- AtomicStringTableLocker locker;
>- auto& atomicStringTable = stringTable();
>- auto iterator = atomicStringTable.find(&string);
>- if (iterator != atomicStringTable.end())
>- return static_cast<AtomicStringImpl*>(*iterator);
>- return nullptr;
>-}
>-
>-RefPtr<AtomicStringImpl> AtomicStringImpl::addUTF8(const char* charactersStart, const char* charactersEnd)
>-{
>- HashAndUTF8Characters buffer;
>- buffer.characters = charactersStart;
>- buffer.hash = calculateStringHashAndLengthFromUTF8MaskingTop8Bits(charactersStart, charactersEnd, buffer.length, buffer.utf16Length);
>-
>- if (!buffer.hash)
>- return nullptr;
>-
>- return addToStringTable<HashAndUTF8Characters, HashAndUTF8CharactersTranslator>(buffer);
>-}
>-
>-RefPtr<AtomicStringImpl> AtomicStringImpl::lookUp(const LChar* characters, unsigned length)
>-{
>- AtomicStringTableLocker locker;
>- auto& table = stringTable();
>-
>- LCharBuffer buffer = { characters, length };
>- auto iterator = table.find<LCharBufferTranslator>(buffer);
>- if (iterator != table.end())
>- return static_cast<AtomicStringImpl*>(*iterator);
>- return nullptr;
>-}
>-
>-RefPtr<AtomicStringImpl> AtomicStringImpl::lookUp(const UChar* characters, unsigned length)
>-{
>- AtomicStringTableLocker locker;
>- auto& table = stringTable();
>-
>- UCharBuffer buffer { characters, length };
>- auto iterator = table.find<UCharBufferTranslator>(buffer);
>- if (iterator != table.end())
>- return static_cast<AtomicStringImpl*>(*iterator);
>- return nullptr;
>-}
>-
>-#if !ASSERT_DISABLED
>-bool AtomicStringImpl::isInAtomicStringTable(StringImpl* string)
>-{
>- AtomicStringTableLocker locker;
>- return stringTable().contains(string);
>-}
>-#endif
>-
>-} // namespace WTF
>diff --git a/Source/WTF/wtf/text/AtomicStringImpl.h b/Source/WTF/wtf/text/AtomicStringImpl.h
>deleted file mode 100644
>index 36a04f4c4b8c8c1518b18796168289df8a384ff2..0000000000000000000000000000000000000000
>--- a/Source/WTF/wtf/text/AtomicStringImpl.h
>+++ /dev/null
>@@ -1,123 +0,0 @@
>-/*
>- * Copyright (C) 2006 Apple Inc.
>- *
>- * This library is free software; you can redistribute it and/or
>- * modify it under the terms of the GNU Library General Public
>- * License as published by the Free Software Foundation; either
>- * version 2 of the License, or (at your option) any later version.
>- *
>- * This library is distributed in the hope that it will be useful,
>- * but WITHOUT ANY WARRANTY; without even the implied warranty of
>- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
>- * Library General Public License for more details.
>- *
>- * You should have received a copy of the GNU Library General Public License
>- * along with this library; see the file COPYING.LIB. If not, write to
>- * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
>- * Boston, MA 02110-1301, USA.
>- *
>- */
>-
>-#pragma once
>-
>-#include <wtf/text/UniquedStringImpl.h>
>-
>-namespace WTF {
>-
>-class AtomicStringTable;
>-
>-class AtomicStringImpl : public UniquedStringImpl {
>-public:
>- WTF_EXPORT_PRIVATE static RefPtr<AtomicStringImpl> lookUp(const LChar*, unsigned length);
>- WTF_EXPORT_PRIVATE static RefPtr<AtomicStringImpl> lookUp(const UChar*, unsigned length);
>- static RefPtr<AtomicStringImpl> lookUp(StringImpl* string)
>- {
>- if (!string || string->isAtomic())
>- return static_cast<AtomicStringImpl*>(string);
>- return lookUpSlowCase(*string);
>- }
>-
>- static void remove(AtomicStringImpl*);
>-
>- WTF_EXPORT_PRIVATE static RefPtr<AtomicStringImpl> add(const LChar*);
>- ALWAYS_INLINE static RefPtr<AtomicStringImpl> add(const char* s) { return add(reinterpret_cast<const LChar*>(s)); };
>- WTF_EXPORT_PRIVATE static RefPtr<AtomicStringImpl> add(const LChar*, unsigned length);
>- WTF_EXPORT_PRIVATE static RefPtr<AtomicStringImpl> add(const UChar*, unsigned length);
>- ALWAYS_INLINE static RefPtr<AtomicStringImpl> add(const char* s, unsigned length) { return add(reinterpret_cast<const LChar*>(s), length); };
>- WTF_EXPORT_PRIVATE static RefPtr<AtomicStringImpl> add(const UChar*);
>- WTF_EXPORT_PRIVATE static RefPtr<AtomicStringImpl> add(StringImpl*, unsigned offset, unsigned length);
>- ALWAYS_INLINE static RefPtr<AtomicStringImpl> add(StringImpl* string)
>- {
>- if (!string)
>- return static_cast<AtomicStringImpl*>(string);
>- return add(*string);
>- }
>- WTF_EXPORT_PRIVATE static RefPtr<AtomicStringImpl> add(const StaticStringImpl*);
>- WTF_EXPORT_PRIVATE static Ref<AtomicStringImpl> addLiteral(const char* characters, unsigned length);
>-
>- // Returns null if the input data contains an invalid UTF-8 sequence.
>- static RefPtr<AtomicStringImpl> addUTF8(const char* start, const char* end);
>-
>-#if USE(CF)
>- WTF_EXPORT_PRIVATE static RefPtr<AtomicStringImpl> add(CFStringRef);
>-#endif
>-
>- template<typename StringTableProvider>
>- ALWAYS_INLINE static RefPtr<AtomicStringImpl> addWithStringTableProvider(StringTableProvider& stringTableProvider, StringImpl* string)
>- {
>- if (!string)
>- return nullptr;
>- return add(*stringTableProvider.atomicStringTable(), *string);
>- }
>-
>-#if !ASSERT_DISABLED
>- WTF_EXPORT_PRIVATE static bool isInAtomicStringTable(StringImpl*);
>-#endif
>-
>-private:
>- AtomicStringImpl() = delete;
>-
>- ALWAYS_INLINE static Ref<AtomicStringImpl> add(StringImpl& string)
>- {
>- if (string.isAtomic()) {
>- ASSERT_WITH_MESSAGE(!string.length() || isInAtomicStringTable(&string), "The atomic string comes from an other thread!");
>- return static_cast<AtomicStringImpl&>(string);
>- }
>- return addSlowCase(string);
>- }
>-
>- ALWAYS_INLINE static Ref<AtomicStringImpl> add(AtomicStringTable& stringTable, StringImpl& string)
>- {
>- if (string.isAtomic()) {
>- ASSERT_WITH_MESSAGE(!string.length() || isInAtomicStringTable(&string), "The atomic string comes from an other thread!");
>- return static_cast<AtomicStringImpl&>(string);
>- }
>- return addSlowCase(stringTable, string);
>- }
>-
>- WTF_EXPORT_PRIVATE static Ref<AtomicStringImpl> addSlowCase(StringImpl&);
>- WTF_EXPORT_PRIVATE static Ref<AtomicStringImpl> addSlowCase(AtomicStringTable&, StringImpl&);
>-
>- WTF_EXPORT_PRIVATE static RefPtr<AtomicStringImpl> lookUpSlowCase(StringImpl&);
>-};
>-
>-#if !ASSERT_DISABLED
>-// AtomicStringImpls created from StaticStringImpl will ASSERT
>-// in the generic ValueCheck<T>::checkConsistency
>-// as they are not allocated by fastMalloc.
>-// We don't currently have any way to detect that case
>-// so we ignore the consistency check for all AtomicStringImpls*.
>-template<> struct
>-ValueCheck<AtomicStringImpl*> {
>- static void checkConsistency(const AtomicStringImpl*) { }
>-};
>-
>-template<> struct
>-ValueCheck<const AtomicStringImpl*> {
>- static void checkConsistency(const AtomicStringImpl*) { }
>-};
>-#endif
>-
>-}
>-
>-using WTF::AtomicStringImpl;
>diff --git a/Source/WTF/wtf/text/AtomicStringTable.cpp b/Source/WTF/wtf/text/AtomicStringTable.cpp
>deleted file mode 100644
>index 420789f150d4b2d26366e8ad49159aea14115f85..0000000000000000000000000000000000000000
>--- a/Source/WTF/wtf/text/AtomicStringTable.cpp
>+++ /dev/null
>@@ -1,38 +0,0 @@
>-/*
>- * Copyright (C) 2004, 2005, 2006, 2007, 2008, 2013 Apple Inc. All rights reserved.
>- * Copyright (C) 2010 Patrick Gansterer <paroga@paroga.com>
>- * Copyright (C) 2012 Google Inc. All rights reserved.
>- *
>- * This library is free software; you can redistribute it and/or
>- * modify it under the terms of the GNU Library General Public
>- * License as published by the Free Software Foundation; either
>- * version 2 of the License, or (at your option) any later version.
>- *
>- * This library is distributed in the hope that it will be useful,
>- * but WITHOUT ANY WARRANTY; without even the implied warranty of
>- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
>- * Library General Public License for more details.
>- *
>- * You should have received a copy of the GNU Library General Public License
>- * along with this library; see the file COPYING.LIB. If not, write to
>- * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
>- * Boston, MA 02110-1301, USA.
>- *
>- */
>-
>-#include "config.h"
>-#include <wtf/text/AtomicStringTable.h>
>-
>-#include <wtf/HashSet.h>
>-#include <wtf/MainThread.h>
>-#include <wtf/Threading.h>
>-
>-namespace WTF {
>-
>-AtomicStringTable::~AtomicStringTable()
>-{
>- for (auto* string : m_table)
>- string->setIsAtomic(false);
>-}
>-
>-}
>diff --git a/Source/WTF/wtf/text/AtomicStringTable.h b/Source/WTF/wtf/text/AtomicStringTable.h
>deleted file mode 100644
>index 2993070783370f61d5cde4527ed5cdca601f22e8..0000000000000000000000000000000000000000
>--- a/Source/WTF/wtf/text/AtomicStringTable.h
>+++ /dev/null
>@@ -1,44 +0,0 @@
>-/*
>- * Copyright (C) 2004, 2005, 2006, 2007, 2008, 2013 Apple Inc. All rights reserved.
>- * Copyright (C) 2010 Patrick Gansterer <paroga@paroga.com>
>- * Copyright (C) 2012 Google Inc. All rights reserved.
>- *
>- * This library is free software; you can redistribute it and/or
>- * modify it under the terms of the GNU Library General Public
>- * License as published by the Free Software Foundation; either
>- * version 2 of the License, or (at your option) any later version.
>- *
>- * This library is distributed in the hope that it will be useful,
>- * but WITHOUT ANY WARRANTY; without even the implied warranty of
>- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
>- * Library General Public License for more details.
>- *
>- * You should have received a copy of the GNU Library General Public License
>- * along with this library; see the file COPYING.LIB. If not, write to
>- * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
>- * Boston, MA 02110-1301, USA.
>- *
>- */
>-
>-#pragma once
>-
>-#include <wtf/HashSet.h>
>-#include <wtf/text/StringImpl.h>
>-
>-namespace WTF {
>-
>-class StringImpl;
>-
>-class AtomicStringTable {
>- WTF_MAKE_FAST_ALLOCATED;
>-public:
>- WTF_EXPORT_PRIVATE ~AtomicStringTable();
>-
>- HashSet<StringImpl*>& table() { return m_table; }
>-
>-private:
>- HashSet<StringImpl*> m_table;
>-};
>-
>-}
>-using WTF::AtomicStringTable;
>diff --git a/Source/WTF/wtf/text/LineBreakIteratorPoolICU.h b/Source/WTF/wtf/text/LineBreakIteratorPoolICU.h
>index 8e89c3116edbcfb2641eb0064ae0bb9d9222838f..2f678d1fcf28eecfa72f027a273e345b67002c55 100644
>--- a/Source/WTF/wtf/text/LineBreakIteratorPoolICU.h
>+++ b/Source/WTF/wtf/text/LineBreakIteratorPoolICU.h
>@@ -29,7 +29,7 @@
> #include <wtf/HashMap.h>
> #include <wtf/NeverDestroyed.h>
> #include <wtf/ThreadSpecific.h>
>-#include <wtf/text/AtomicString.h>
>+#include <wtf/text/AtomString.h>
> 
> namespace WTF {
> 
>@@ -44,9 +44,9 @@ public:
> return *pool.get();
> }
> 
>- static AtomicString makeLocaleWithBreakKeyword(const AtomicString& locale, LineBreakIteratorMode mode)
>+ static AtomString makeLocaleWithBreakKeyword(const AtomString& locale, LineBreakIteratorMode mode)
> {
>- // The uloc functions model locales as char*, so we have to downconvert our AtomicString.
>+ // The uloc functions model locales as char*, so we have to downconvert our AtomString.
> auto utf8Locale = locale.string().utf8();
> if (!utf8Locale.length())
> return locale;
>@@ -72,7 +72,7 @@ public:
> UErrorCode status = U_ZERO_ERROR;
> int32_t lengthNeeded = uloc_setKeywordValue("lb", keywordValue, scratchBuffer.data(), scratchBuffer.size(), &status);
> if (U_SUCCESS(status))
>- return AtomicString::fromUTF8(scratchBuffer.data(), lengthNeeded);
>+ return AtomString::fromUTF8(scratchBuffer.data(), lengthNeeded);
> if (status == U_BUFFER_OVERFLOW_ERROR) {
> scratchBuffer.grow(lengthNeeded + 1);
> memset(scratchBuffer.data() + utf8Locale.length(), 0, scratchBuffer.size() - utf8Locale.length());
>@@ -80,12 +80,12 @@ public:
> int32_t lengthNeeded2 = uloc_setKeywordValue("lb", keywordValue, scratchBuffer.data(), scratchBuffer.size(), &status);
> if (!U_SUCCESS(status) || lengthNeeded != lengthNeeded2)
> return locale;
>- return AtomicString::fromUTF8(scratchBuffer.data(), lengthNeeded);
>+ return AtomString::fromUTF8(scratchBuffer.data(), lengthNeeded);
> }
> return locale;
> }
> 
>- UBreakIterator* take(const AtomicString& locale, LineBreakIteratorMode mode)
>+ UBreakIterator* take(const AtomString& locale, LineBreakIteratorMode mode)
> {
> auto localeWithOptionalBreakKeyword = makeLocaleWithBreakKeyword(locale, mode);
> 
>@@ -122,8 +122,8 @@ public:
> private:
> static constexpr size_t capacity = 4;
> 
>- Vector<std::pair<AtomicString, UBreakIterator*>, capacity> m_pool;
>- HashMap<UBreakIterator*, AtomicString> m_vendedIterators;
>+ Vector<std::pair<AtomString, UBreakIterator*>, capacity> m_pool;
>+ HashMap<UBreakIterator*, AtomString> m_vendedIterators;
> 
> friend WTF::ThreadSpecific<LineBreakIteratorPool>::operator LineBreakIteratorPool*();
> };
>diff --git a/Source/WTF/wtf/text/StringBuilder.h b/Source/WTF/wtf/text/StringBuilder.h
>index fe4c5320ceb3f1d28a04f59283996b92bbc1e51e..c36f01f6cf5af157440994c8e4cd743f2dd64f43 100644
>--- a/Source/WTF/wtf/text/StringBuilder.h
>+++ b/Source/WTF/wtf/text/StringBuilder.h
>@@ -27,7 +27,7 @@
> #pragma once
> 
> #include <wtf/CheckedArithmetic.h>
>-#include <wtf/text/AtomicString.h>
>+#include <wtf/text/AtomString.h>
> #include <wtf/text/IntegerToStringConversion.h>
> #include <wtf/text/StringView.h>
> #include <wtf/text/WTFString.h>
>@@ -72,9 +72,9 @@ public:
> 
> ALWAYS_INLINE void append(const char* characters, unsigned length) { append(reinterpret_cast<const LChar*>(characters), length); }
> 
>- void append(const AtomicString& atomicString)
>+ void append(const AtomString& atomString)
> {
>- append(atomicString.string());
>+ append(atomString.string());
> }
> 
> void append(const String& string)
>@@ -252,24 +252,24 @@ public:
> return m_string;
> }
> 
>- AtomicString toAtomicString() const
>+ AtomString toAtomString() const
> {
> RELEASE_ASSERT(!hasOverflowed());
> if (!m_length)
> return emptyAtom();
> 
>- // If the buffer is sufficiently over-allocated, make a new AtomicString from a copy so its buffer is not so large.
>+ // If the buffer is sufficiently over-allocated, make a new AtomString from a copy so its buffer is not so large.
> if (canShrink()) {
> if (is8Bit())
>- return AtomicString(characters8(), length());
>- return AtomicString(characters16(), length()); 
>+ return AtomString(characters8(), length());
>+ return AtomString(characters16(), length()); 
> }
> 
> if (!m_string.isNull())
>- return AtomicString(m_string);
>+ return AtomString(m_string);
> 
> ASSERT(m_buffer);
>- return AtomicString(m_buffer.get(), 0, m_length.unsafeGet());
>+ return AtomString(m_buffer.get(), 0, m_length.unsafeGet());
> }
> 
> unsigned length() const
>diff --git a/Source/WTF/wtf/text/StringConcatenate.h b/Source/WTF/wtf/text/StringConcatenate.h
>index c5d020181842c26013bd4879e774a3bf1c8d172c..c8cba0723530ee4762fb727b80a1231a59ff9490 100644
>--- a/Source/WTF/wtf/text/StringConcatenate.h
>+++ b/Source/WTF/wtf/text/StringConcatenate.h
>@@ -27,7 +27,7 @@
> 
> #include <cstring>
> #include <wtf/CheckedArithmetic.h>
>-#include <wtf/text/AtomicString.h>
>+#include <wtf/text/AtomString.h>
> #include <wtf/text/StringView.h>
> 
> // This macro is helpful for testing how many intermediate Strings are created while evaluating an
>@@ -189,9 +189,9 @@ private:
> const String& m_string;
> };
> 
>-template<> class StringTypeAdapter<AtomicString, void> : public StringTypeAdapter<String, void> {
>+template<> class StringTypeAdapter<AtomString, void> : public StringTypeAdapter<String, void> {
> public:
>- StringTypeAdapter(const AtomicString& string)
>+ StringTypeAdapter(const AtomString& string)
> : StringTypeAdapter<String, void> { string.string() }
> {
> }
>diff --git a/Source/WTF/wtf/text/StringHash.h b/Source/WTF/wtf/text/StringHash.h
>index 9ee6838d55fa0ea553f4710e2497670ac524bc8e..02b7f3798026cb6a73a129fc7e3846faea81e643 100644
>--- a/Source/WTF/wtf/text/StringHash.h
>+++ b/Source/WTF/wtf/text/StringHash.h
>@@ -22,7 +22,7 @@
> #pragma once
> 
> #include <wtf/HashTraits.h>
>-#include <wtf/text/AtomicString.h>
>+#include <wtf/text/AtomString.h>
> #include <wtf/text/StringHasher.h>
> 
> namespace WTF {
>@@ -139,7 +139,7 @@ namespace WTF {
> {
> return hash(key.impl());
> }
>- static unsigned hash(const AtomicString& key)
>+ static unsigned hash(const AtomString& key)
> {
> return hash(key.impl());
> }
>@@ -147,7 +147,7 @@ namespace WTF {
> {
> return equal(a.impl(), b.impl());
> }
>- static bool equal(const AtomicString& a, const AtomicString& b)
>+ static bool equal(const AtomString& a, const AtomString& b)
> {
> // FIXME: Is the "a == b" here a helpful optimization?
> // It makes all cases where the strings are not identical slightly slower.
>diff --git a/Source/WTF/wtf/text/StringImpl.cpp b/Source/WTF/wtf/text/StringImpl.cpp
>index 0d80c32c7485d8f9c62934bb36efddefa475dde4..3f60781f7f1d7937ae69dfdd90984018b40a6108 100644
>--- a/Source/WTF/wtf/text/StringImpl.cpp
>+++ b/Source/WTF/wtf/text/StringImpl.cpp
>@@ -27,7 +27,7 @@
> 
> #include <wtf/ProcessID.h>
> #include <wtf/StdLibExtras.h>
>-#include <wtf/text/AtomicString.h>
>+#include <wtf/text/AtomString.h>
> #include <wtf/text/CString.h>
> #include <wtf/text/ExternalStringImpl.h>
> #include <wtf/text/StringBuffer.h>
>@@ -112,10 +112,10 @@ StringImpl::~StringImpl()
> 
> STRING_STATS_REMOVE_STRING(*this);
> 
>- if (isAtomic()) {
>+ if (isAtom()) {
> ASSERT(!isSymbol());
> if (length())
>- AtomicStringImpl::remove(static_cast<AtomicStringImpl*>(this));
>+ AtomStringImpl::remove(static_cast<AtomStringImpl*>(this));
> } else if (isSymbol()) {
> auto& symbol = static_cast<SymbolImpl&>(*this);
> auto* symbolRegistry = symbol.symbolRegistry();
>@@ -518,7 +518,7 @@ upconvert:
> return newImpl;
> }
> 
>-static inline bool needsTurkishCasingRules(const AtomicString& localeIdentifier)
>+static inline bool needsTurkishCasingRules(const AtomString& localeIdentifier)
> {
> // Either "tr" or "az" locale, with case sensitive comparison and allowing for an ignored subtag.
> UChar first = localeIdentifier[0];
>@@ -528,7 +528,7 @@ static inline bool needsTurkishCasingRules(const AtomicString& localeIdentifier)
> && (localeIdentifier.length() == 2 || localeIdentifier[2] == '-');
> }
> 
>-Ref<StringImpl> StringImpl::convertToLowercaseWithLocale(const AtomicString& localeIdentifier)
>+Ref<StringImpl> StringImpl::convertToLowercaseWithLocale(const AtomString& localeIdentifier)
> {
> // Use the more-optimized code path most of the time.
> // Assuming here that the only locale-specific lowercasing is the Turkish casing rules.
>@@ -564,7 +564,7 @@ Ref<StringImpl> StringImpl::convertToLowercaseWithLocale(const AtomicString& loc
> return newString;
> }
> 
>-Ref<StringImpl> StringImpl::convertToUppercaseWithLocale(const AtomicString& localeIdentifier)
>+Ref<StringImpl> StringImpl::convertToUppercaseWithLocale(const AtomString& localeIdentifier)
> {
> // Use the more-optimized code path most of the time.
> // Assuming here that the only locale-specific lowercasing is the Turkish casing rules,
>diff --git a/Source/WTF/wtf/text/StringImpl.h b/Source/WTF/wtf/text/StringImpl.h
>index e564648c543cd823de8f223c4237cc9269519304..d79c557966ca5d15a430e3baa805bb95d4b7de06 100644
>--- a/Source/WTF/wtf/text/StringImpl.h
>+++ b/Source/WTF/wtf/text/StringImpl.h
>@@ -168,7 +168,7 @@ protected:
> class StringImpl : private StringImplShape {
> WTF_MAKE_NONCOPYABLE(StringImpl); WTF_MAKE_FAST_ALLOCATED;
> 
>- friend class AtomicStringImpl;
>+ friend class AtomStringImpl;
> friend class JSC::LLInt::Data;
> friend class JSC::LLIntOffsetsExtractor;
> friend class PrivateSymbolImpl;
>@@ -292,7 +292,7 @@ public:
> WTF_EXPORT_PRIVATE size_t sizeInBytes() const;
> 
> bool isSymbol() const { return m_hashAndFlags & s_hashFlagStringKindIsSymbol; }
>- bool isAtomic() const { return m_hashAndFlags & s_hashFlagStringKindIsAtomic; }
>+ bool isAtom() const { return m_hashAndFlags & s_hashFlagStringKindIsAtomic; }
> void setIsAtomic(bool);
> 
> bool isExternal() const { return bufferOwnership() == BufferExternal; }
>@@ -412,8 +412,8 @@ public:
> WTF_EXPORT_PRIVATE Ref<StringImpl> convertToLowercaseWithoutLocale();
> WTF_EXPORT_PRIVATE Ref<StringImpl> convertToLowercaseWithoutLocaleStartingAtFailingIndex8Bit(unsigned);
> WTF_EXPORT_PRIVATE Ref<StringImpl> convertToUppercaseWithoutLocale();
>- WTF_EXPORT_PRIVATE Ref<StringImpl> convertToLowercaseWithLocale(const AtomicString& localeIdentifier);
>- WTF_EXPORT_PRIVATE Ref<StringImpl> convertToUppercaseWithLocale(const AtomicString& localeIdentifier);
>+ WTF_EXPORT_PRIVATE Ref<StringImpl> convertToLowercaseWithLocale(const AtomString& localeIdentifier);
>+ WTF_EXPORT_PRIVATE Ref<StringImpl> convertToUppercaseWithLocale(const AtomString& localeIdentifier);
> 
> Ref<StringImpl> foldCase();
> 
>@@ -1031,11 +1031,11 @@ inline size_t StringImpl::costDuringGC()
> return divideRoundedUp(result, refCount());
> }
> 
>-inline void StringImpl::setIsAtomic(bool isAtomic)
>+inline void StringImpl::setIsAtomic(bool isAtom)
> {
> ASSERT(!isStatic());
> ASSERT(!isSymbol());
>- if (isAtomic)
>+ if (isAtom)
> m_hashAndFlags |= s_hashFlagStringKindIsAtomic;
> else
> m_hashAndFlags &= ~s_hashFlagStringKindIsAtomic;
>diff --git a/Source/WTF/wtf/text/StringOperators.h b/Source/WTF/wtf/text/StringOperators.h
>index 743ee9f84ee0da1405de97955908bc061684f98f..78621ff2fe98a0003678de4dc8bad8166768acc4 100644
>--- a/Source/WTF/wtf/text/StringOperators.h
>+++ b/Source/WTF/wtf/text/StringOperators.h
>@@ -39,7 +39,7 @@ public:
> return result;
> }
> 
>- operator AtomicString() const
>+ operator AtomString() const
> {
> return operator String();
> }
>@@ -101,9 +101,9 @@ inline StringAppend<const char*, String> operator+(const char* string1, const St
> return StringAppend<const char*, String>(string1, string2);
> }
> 
>-inline StringAppend<const char*, AtomicString> operator+(const char* string1, const AtomicString& string2)
>+inline StringAppend<const char*, AtomString> operator+(const char* string1, const AtomString& string2)
> {
>- return StringAppend<const char*, AtomicString>(string1, string2);
>+ return StringAppend<const char*, AtomString>(string1, string2);
> }
> 
> template<typename T, typename = std::enable_if_t<std::is_same<std::decay_t<T>, StringView>::value>>
>@@ -123,9 +123,9 @@ inline StringAppend<const UChar*, String> operator+(const UChar* string1, const
> return StringAppend<const UChar*, String>(string1, string2);
> }
> 
>-inline StringAppend<const UChar*, AtomicString> operator+(const UChar* string1, const AtomicString& string2)
>+inline StringAppend<const UChar*, AtomString> operator+(const UChar* string1, const AtomString& string2)
> {
>- return StringAppend<const UChar*, AtomicString>(string1, string2);
>+ return StringAppend<const UChar*, AtomString>(string1, string2);
> }
> 
> template<typename T, typename = std::enable_if_t<std::is_same<std::decay_t<T>, StringView>::value>>
>@@ -145,9 +145,9 @@ inline StringAppend<ASCIILiteral, String> operator+(const ASCIILiteral& string1,
> return StringAppend<ASCIILiteral, String>(string1, string2);
> }
> 
>-inline StringAppend<ASCIILiteral, AtomicString> operator+(const ASCIILiteral& string1, const AtomicString& string2)
>+inline StringAppend<ASCIILiteral, AtomString> operator+(const ASCIILiteral& string1, const AtomString& string2)
> {
>- return StringAppend<ASCIILiteral, AtomicString>(string1, string2);
>+ return StringAppend<ASCIILiteral, AtomString>(string1, string2);
> }
> 
> template<typename T, typename = std::enable_if_t<std::is_same<std::decay_t<T>, StringView>::value>>
>diff --git a/Source/WTF/wtf/text/StringView.h b/Source/WTF/wtf/text/StringView.h
>index 64102bfaa805cb0c638f548612e469018a1b2687..68886f66cf92743e9541dc271ebc1c49776e8a6e 100644
>--- a/Source/WTF/wtf/text/StringView.h
>+++ b/Source/WTF/wtf/text/StringView.h
>@@ -59,7 +59,7 @@ public:
> StringView& operator=(const StringView&);
> #endif
> 
>- StringView(const AtomicString&);
>+ StringView(const AtomString&);
> StringView(const String&);
> StringView(const StringImpl&);
> StringView(const StringImpl*);
>@@ -92,8 +92,8 @@ public:
> 
> String toString() const;
> String toStringWithoutCopying() const;
>- AtomicString toAtomicString() const;
>- RefPtr<AtomicStringImpl> toExistingAtomicString() const;
>+ AtomString toAtomString() const;
>+ RefPtr<AtomStringImpl> toExistingAtomString() const;
> 
> #if USE(CF)
> // This function converts null strings to empty strings.
>@@ -223,7 +223,7 @@ WTF_EXPORT_PRIVATE String normalizedNFC(const String&);
> 
> }
> 
>-#include <wtf/text/AtomicString.h>
>+#include <wtf/text/AtomString.h>
> #include <wtf/text/WTFString.h>
> 
> namespace WTF {
>@@ -362,8 +362,8 @@ inline StringView::StringView(const String& string)
> initialize(string.characters16(), string.length());
> }
> 
>-inline StringView::StringView(const AtomicString& atomicString)
>- : StringView(atomicString.string())
>+inline StringView::StringView(const AtomString& atomString)
>+ : StringView(atomString.string())
> {
> }
> 
>@@ -504,18 +504,18 @@ inline String StringView::toString() const
> return String(characters16(), m_length);
> }
> 
>-inline AtomicString StringView::toAtomicString() const
>+inline AtomString StringView::toAtomString() const
> {
> if (is8Bit())
>- return AtomicString(characters8(), m_length);
>- return AtomicString(characters16(), m_length);
>+ return AtomString(characters8(), m_length);
>+ return AtomString(characters16(), m_length);
> }
> 
>-inline RefPtr<AtomicStringImpl> StringView::toExistingAtomicString() const
>+inline RefPtr<AtomStringImpl> StringView::toExistingAtomString() const
> {
> if (is8Bit())
>- return AtomicStringImpl::lookUp(characters8(), m_length);
>- return AtomicStringImpl::lookUp(characters16(), m_length);
>+ return AtomStringImpl::lookUp(characters8(), m_length);
>+ return AtomStringImpl::lookUp(characters16(), m_length);
> }
> 
> inline float StringView::toFloat(bool& isValid) const
>diff --git a/Source/WTF/wtf/text/TextBreakIterator.cpp b/Source/WTF/wtf/text/TextBreakIterator.cpp
>index acf6844b06958ffabb8c5af6419a4d2bc85e76ce..b2a1e591830300efdeea185912c8d4f524a7d5d8 100644
>--- a/Source/WTF/wtf/text/TextBreakIterator.cpp
>+++ b/Source/WTF/wtf/text/TextBreakIterator.cpp
>@@ -35,7 +35,7 @@ namespace WTF {
> 
> #if !PLATFORM(MAC) && !PLATFORM(IOS_FAMILY)
> 
>-static Variant<TextBreakIteratorICU, TextBreakIteratorPlatform> mapModeToBackingIterator(StringView string, TextBreakIterator::Mode mode, const AtomicString& locale)
>+static Variant<TextBreakIteratorICU, TextBreakIteratorPlatform> mapModeToBackingIterator(StringView string, TextBreakIterator::Mode mode, const AtomString& locale)
> {
> switch (mode) {
> case TextBreakIterator::Mode::Line:
>@@ -50,7 +50,7 @@ static Variant<TextBreakIteratorICU, TextBreakIteratorPlatform> mapModeToBacking
> }
> }
> 
>-TextBreakIterator::TextBreakIterator(StringView string, Mode mode, const AtomicString& locale)
>+TextBreakIterator::TextBreakIterator(StringView string, Mode mode, const AtomString& locale)
> : m_backing(mapModeToBackingIterator(string, mode, locale))
> , m_mode(mode)
> , m_locale(locale)
>@@ -171,7 +171,7 @@ UBreakIterator* sentenceBreakIterator(StringView string)
> return setTextForIterator(*staticSentenceBreakIterator, string);
> }
> 
>-UBreakIterator* acquireLineBreakIterator(StringView string, const AtomicString& locale, const UChar* priorContext, unsigned priorContextLength, LineBreakIteratorMode mode)
>+UBreakIterator* acquireLineBreakIterator(StringView string, const AtomString& locale, const UChar* priorContext, unsigned priorContextLength, LineBreakIteratorMode mode)
> {
> UBreakIterator* iterator = LineBreakIteratorPool::sharedPool().take(locale, mode);
> if (!iterator)
>@@ -187,7 +187,7 @@ void releaseLineBreakIterator(UBreakIterator* iterator)
> LineBreakIteratorPool::sharedPool().put(iterator);
> }
> 
>-UBreakIterator* openLineBreakIterator(const AtomicString& locale)
>+UBreakIterator* openLineBreakIterator(const AtomString& locale)
> {
> bool localeIsEmpty = locale.isEmpty();
> UErrorCode openStatus = U_ZERO_ERROR;
>diff --git a/Source/WTF/wtf/text/TextBreakIterator.h b/Source/WTF/wtf/text/TextBreakIterator.h
>index 902232fb1c333f183b3f159d5aae2df3bb3607a1..1af10521ccf12fc3f3b2510c696e7a67cc434926 100644
>--- a/Source/WTF/wtf/text/TextBreakIterator.h
>+++ b/Source/WTF/wtf/text/TextBreakIterator.h
>@@ -81,7 +81,7 @@ private:
> friend class TextBreakIteratorCache;
> 
> // Use CachedTextBreakIterator instead of constructing one of these directly.
>- WTF_EXPORT TextBreakIterator(StringView, Mode, const AtomicString& locale);
>+ WTF_EXPORT TextBreakIterator(StringView, Mode, const AtomString& locale);
> 
> void setText(StringView string)
> {
>@@ -95,14 +95,14 @@ private:
> return m_mode;
> }
> 
>- const AtomicString& locale() const
>+ const AtomString& locale() const
> {
> return m_locale;
> }
> 
> Variant<TextBreakIteratorICU, TextBreakIteratorPlatform> m_backing;
> Mode m_mode;
>- AtomicString m_locale;
>+ AtomString m_locale;
> };
> 
> class CachedTextBreakIterator;
>@@ -124,7 +124,7 @@ private:
> TextBreakIteratorCache& operator=(const TextBreakIteratorCache&) = delete;
> TextBreakIteratorCache& operator=(TextBreakIteratorCache&&) = delete;
> 
>- TextBreakIterator take(StringView string, TextBreakIterator::Mode mode, const AtomicString& locale)
>+ TextBreakIterator take(StringView string, TextBreakIterator::Mode mode, const AtomString& locale)
> {
> auto iter = std::find_if(m_unused.begin(), m_unused.end(), [&](TextBreakIterator& candidate) {
> return candidate.mode() == mode && candidate.locale() == locale;
>@@ -157,7 +157,7 @@ private:
> // RAII for TextBreakIterator and TextBreakIteratorCache.
> class CachedTextBreakIterator {
> public:
>- CachedTextBreakIterator(StringView string, TextBreakIterator::Mode mode, const AtomicString& locale)
>+ CachedTextBreakIterator(StringView string, TextBreakIterator::Mode mode, const AtomString& locale)
> : m_backing(TextBreakIteratorCache::singleton().take(string, mode, locale))
> {
> }
>@@ -199,9 +199,9 @@ enum class LineBreakIteratorMode { Default, Loose, Normal, Strict };
> WTF_EXPORT_PRIVATE UBreakIterator* wordBreakIterator(StringView);
> WTF_EXPORT_PRIVATE UBreakIterator* sentenceBreakIterator(StringView);
> 
>-WTF_EXPORT_PRIVATE UBreakIterator* acquireLineBreakIterator(StringView, const AtomicString& locale, const UChar* priorContext, unsigned priorContextLength, LineBreakIteratorMode);
>+WTF_EXPORT_PRIVATE UBreakIterator* acquireLineBreakIterator(StringView, const AtomString& locale, const UChar* priorContext, unsigned priorContextLength, LineBreakIteratorMode);
> WTF_EXPORT_PRIVATE void releaseLineBreakIterator(UBreakIterator*);
>-UBreakIterator* openLineBreakIterator(const AtomicString& locale);
>+UBreakIterator* openLineBreakIterator(const AtomString& locale);
> void closeLineBreakIterator(UBreakIterator*&);
> 
> WTF_EXPORT_PRIVATE bool isWordTextBreak(UBreakIterator*);
>@@ -213,7 +213,7 @@ public:
> resetPriorContext();
> }
> 
>- explicit LazyLineBreakIterator(StringView stringView, const AtomicString& locale = AtomicString(), LineBreakIteratorMode mode = LineBreakIteratorMode::Default)
>+ explicit LazyLineBreakIterator(StringView stringView, const AtomString& locale = AtomString(), LineBreakIteratorMode mode = LineBreakIteratorMode::Default)
> : m_stringView(stringView)
> , m_locale(locale)
> , m_mode(mode)
>@@ -293,7 +293,7 @@ public:
> return m_iterator;
> }
> 
>- void resetStringAndReleaseIterator(StringView stringView, const AtomicString& locale, LineBreakIteratorMode mode)
>+ void resetStringAndReleaseIterator(StringView stringView, const AtomString& locale, LineBreakIteratorMode mode)
> {
> if (m_iterator)
> releaseLineBreakIterator(m_iterator);
>@@ -308,7 +308,7 @@ public:
> private:
> static constexpr unsigned priorContextCapacity = 2;
> StringView m_stringView;
>- AtomicString m_locale;
>+ AtomString m_locale;
> UBreakIterator* m_iterator { nullptr };
> const UChar* m_cachedPriorContext { nullptr };
> LineBreakIteratorMode m_mode { LineBreakIteratorMode::Default };
>diff --git a/Source/WTF/wtf/text/WTFString.cpp b/Source/WTF/wtf/text/WTFString.cpp
>index e5c18fe4c36f59d97203d9270f6f2a208b1e2764..43de3d076059f8074b74876ef77f683904b6a0b4 100644
>--- a/Source/WTF/wtf/text/WTFString.cpp
>+++ b/Source/WTF/wtf/text/WTFString.cpp
>@@ -356,13 +356,13 @@ String String::convertToUppercaseWithoutLocale() const
> return m_impl ? m_impl->convertToUppercaseWithoutLocale() : String { };
> }
> 
>-String String::convertToLowercaseWithLocale(const AtomicString& localeIdentifier) const
>+String String::convertToLowercaseWithLocale(const AtomString& localeIdentifier) const
> {
> // FIXME: Should this function, and the many others like it, be inlined?
> return m_impl ? m_impl->convertToLowercaseWithLocale(localeIdentifier) : String { };
> }
> 
>-String String::convertToUppercaseWithLocale(const AtomicString& localeIdentifier) const
>+String String::convertToUppercaseWithLocale(const AtomString& localeIdentifier) const
> {
> // FIXME: Should this function, and the many others like it, be inlined?
> return m_impl ? m_impl->convertToUppercaseWithLocale(localeIdentifier) : String { };
>@@ -649,8 +649,8 @@ String String::isolatedCopy() &&
> bool String::isSafeToSendToAnotherThread() const
> {
> // AtomicStrings are not safe to send between threads as ~StringImpl()
>- // will try to remove them from the wrong AtomicStringTable.
>- return isEmpty() || (m_impl->hasOneRef() && !m_impl->isAtomic());
>+ // will try to remove them from the wrong AtomStringTable.
>+ return isEmpty() || (m_impl->hasOneRef() && !m_impl->isAtom());
> }
> 
> template<bool allowEmptyEntries>
>diff --git a/Source/WTF/wtf/text/WTFString.h b/Source/WTF/wtf/text/WTFString.h
>index 9a753adb6123da4c4f1eb8fab9912e146d37b363..0dd1567b0632f894fa0527ca67fce8166ba58852 100644
>--- a/Source/WTF/wtf/text/WTFString.h
>+++ b/Source/WTF/wtf/text/WTFString.h
>@@ -114,8 +114,8 @@ public:
> String(Ref<StringImpl>&&);
> String(RefPtr<StringImpl>&&);
> 
>- String(Ref<AtomicStringImpl>&&);
>- String(RefPtr<AtomicStringImpl>&&);
>+ String(Ref<AtomStringImpl>&&);
>+ String(RefPtr<AtomStringImpl>&&);
> 
> String(StaticStringImpl&);
> String(StaticStringImpl*);
>@@ -250,8 +250,8 @@ public:
> WTF_EXPORT_PRIVATE String convertToLowercaseWithoutLocale() const;
> WTF_EXPORT_PRIVATE String convertToLowercaseWithoutLocaleStartingAtFailingIndex8Bit(unsigned) const;
> WTF_EXPORT_PRIVATE String convertToUppercaseWithoutLocale() const;
>- WTF_EXPORT_PRIVATE String convertToLowercaseWithLocale(const AtomicString& localeIdentifier) const;
>- WTF_EXPORT_PRIVATE String convertToUppercaseWithLocale(const AtomicString& localeIdentifier) const;
>+ WTF_EXPORT_PRIVATE String convertToLowercaseWithLocale(const AtomString& localeIdentifier) const;
>+ WTF_EXPORT_PRIVATE String convertToUppercaseWithLocale(const AtomString& localeIdentifier) const;
> 
> WTF_EXPORT_PRIVATE String stripWhiteSpace() const;
> WTF_EXPORT_PRIVATE String simplifyWhiteSpace() const;
>@@ -475,12 +475,12 @@ inline String::String(RefPtr<StringImpl>&& string)
> {
> }
> 
>-inline String::String(Ref<AtomicStringImpl>&& string)
>+inline String::String(Ref<AtomStringImpl>&& string)
> : m_impl(WTFMove(string))
> {
> }
> 
>-inline String::String(RefPtr<AtomicStringImpl>&& string)
>+inline String::String(RefPtr<AtomStringImpl>&& string)
> : m_impl(WTFMove(string))
> {
> }
>@@ -679,4 +679,4 @@ using WTF::isAllSpecialCharacters;
> using WTF::isSpaceOrNewline;
> using WTF::reverseFind;
> 
>-#include <wtf/text/AtomicString.h>
>+#include <wtf/text/AtomString.h>
>diff --git a/Source/WTF/wtf/text/cf/AtomStringImplCF.cpp b/Source/WTF/wtf/text/cf/AtomStringImplCF.cpp
>new file mode 100644
>index 0000000000000000000000000000000000000000..0231a9a05fc6d9016d9f3aaee7ae378cbafa3177
>--- /dev/null
>+++ b/Source/WTF/wtf/text/cf/AtomStringImplCF.cpp
>@@ -0,0 +1,56 @@
>+/*
>+ * Copyright (C) 2012 Apple Inc. All rights reserved.
>+ *
>+ * Redistribution and use in source and binary forms, with or without
>+ * modification, are permitted provided that the following conditions
>+ * are met:
>+ * 1. Redistributions of source code must retain the above copyright
>+ * notice, this list of conditions and the following disclaimer.
>+ * 2. Redistributions in binary form must reproduce the above copyright
>+ * notice, this list of conditions and the following disclaimer in the
>+ * documentation and/or other materials provided with the distribution.
>+ *
>+ * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
>+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
>+ * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
>+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
>+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
>+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
>+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
>+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
>+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
>+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
>+ * THE POSSIBILITY OF SUCH DAMAGE.
>+ */
>+
>+#include "config.h"
>+#include <wtf/text/AtomStringImpl.h>
>+
>+#if USE(CF)
>+
>+#include <CoreFoundation/CoreFoundation.h>
>+#include <wtf/text/CString.h>
>+
>+namespace WTF {
>+
>+RefPtr<AtomStringImpl> AtomStringImpl::add(CFStringRef string)
>+{
>+ if (!string)
>+ return nullptr;
>+
>+ CFIndex length = CFStringGetLength(string);
>+
>+ if (const LChar* ptr = reinterpret_cast<const LChar*>(CFStringGetCStringPtr(string, kCFStringEncodingISOLatin1)))
>+ return add(ptr, length);
>+
>+ if (const UniChar* ptr = CFStringGetCharactersPtr(string))
>+ return add(reinterpret_cast<const UChar*>(ptr), length);
>+
>+ Vector<UniChar, 1024> ucharBuffer(length);
>+ CFStringGetCharacters(string, CFRangeMake(0, length), ucharBuffer.data());
>+ return add(reinterpret_cast<const UChar*>(ucharBuffer.data()), length);
>+}
>+
>+} // namespace WTF
>+
>+#endif // USE(CF)
>diff --git a/Source/WTF/wtf/text/cf/AtomicStringImplCF.cpp b/Source/WTF/wtf/text/cf/AtomicStringImplCF.cpp
>deleted file mode 100644
>index 4a3f15dae49847aa8ff28dc3a776b675c51f90c7..0000000000000000000000000000000000000000
>--- a/Source/WTF/wtf/text/cf/AtomicStringImplCF.cpp
>+++ /dev/null
>@@ -1,56 +0,0 @@
>-/*
>- * Copyright (C) 2012 Apple Inc. All rights reserved.
>- *
>- * Redistribution and use in source and binary forms, with or without
>- * modification, are permitted provided that the following conditions
>- * are met:
>- * 1. Redistributions of source code must retain the above copyright
>- * notice, this list of conditions and the following disclaimer.
>- * 2. Redistributions in binary form must reproduce the above copyright
>- * notice, this list of conditions and the following disclaimer in the
>- * documentation and/or other materials provided with the distribution.
>- *
>- * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
>- * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
>- * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
>- * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
>- * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
>- * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
>- * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
>- * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
>- * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
>- * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
>- * THE POSSIBILITY OF SUCH DAMAGE.
>- */
>-
>-#include "config.h"
>-#include <wtf/text/AtomicStringImpl.h>
>-
>-#if USE(CF)
>-
>-#include <CoreFoundation/CoreFoundation.h>
>-#include <wtf/text/CString.h>
>-
>-namespace WTF {
>-
>-RefPtr<AtomicStringImpl> AtomicStringImpl::add(CFStringRef string)
>-{
>- if (!string)
>- return nullptr;
>-
>- CFIndex length = CFStringGetLength(string);
>-
>- if (const LChar* ptr = reinterpret_cast<const LChar*>(CFStringGetCStringPtr(string, kCFStringEncodingISOLatin1)))
>- return add(ptr, length);
>-
>- if (const UniChar* ptr = CFStringGetCharactersPtr(string))
>- return add(reinterpret_cast<const UChar*>(ptr), length);
>-
>- Vector<UniChar, 1024> ucharBuffer(length);
>- CFStringGetCharacters(string, CFRangeMake(0, length), ucharBuffer.data());
>- return add(reinterpret_cast<const UChar*>(ucharBuffer.data()), length);
>-}
>-
>-} // namespace WTF
>-
>-#endif // USE(CF)
>diff --git a/Source/WTF/wtf/text/cocoa/TextBreakIteratorInternalICUCocoa.cpp b/Source/WTF/wtf/text/cocoa/TextBreakIteratorInternalICUCocoa.cpp
>index 6f63df9b408011c32a812ab6d063c7d09e44c41b..e99af37e699710e4d3a81e0ad8142b15068530e4 100644
>--- a/Source/WTF/wtf/text/cocoa/TextBreakIteratorInternalICUCocoa.cpp
>+++ b/Source/WTF/wtf/text/cocoa/TextBreakIteratorInternalICUCocoa.cpp
>@@ -26,7 +26,7 @@
> 
> namespace WTF {
> 
>-static Variant<TextBreakIteratorICU, TextBreakIteratorPlatform> mapModeToBackingIterator(StringView string, TextBreakIterator::Mode mode, const AtomicString& locale)
>+static Variant<TextBreakIteratorICU, TextBreakIteratorPlatform> mapModeToBackingIterator(StringView string, TextBreakIterator::Mode mode, const AtomString& locale)
> {
> switch (mode) {
> case TextBreakIterator::Mode::Line:
>@@ -38,7 +38,7 @@ static Variant<TextBreakIteratorICU, TextBreakIteratorPlatform> mapModeToBacking
> }
> }
> 
>-TextBreakIterator::TextBreakIterator(StringView string, Mode mode, const AtomicString& locale)
>+TextBreakIterator::TextBreakIterator(StringView string, Mode mode, const AtomString& locale)
> : m_backing(mapModeToBackingIterator(string, mode, locale))
> , m_mode(mode)
> , m_locale(locale)
>diff --git a/Source/WebCore/Modules/airplay/WebKitPlaybackTargetAvailabilityEvent.cpp b/Source/WebCore/Modules/airplay/WebKitPlaybackTargetAvailabilityEvent.cpp
>index 2a3e09223e0c8d6328d1eeedb652512ca5b56608..e29cad0d1b2c10db2a12a4da58a04261f67f878b 100644
>--- a/Source/WebCore/Modules/airplay/WebKitPlaybackTargetAvailabilityEvent.cpp
>+++ b/Source/WebCore/Modules/airplay/WebKitPlaybackTargetAvailabilityEvent.cpp
>@@ -32,21 +32,21 @@
> 
> namespace WebCore {
> 
>-static const AtomicString& stringForPlaybackTargetAvailability(bool available)
>+static const AtomString& stringForPlaybackTargetAvailability(bool available)
> {
>- static NeverDestroyed<AtomicString> availableString("available", AtomicString::ConstructFromLiteral);
>- static NeverDestroyed<AtomicString> notAvailableString("not-available", AtomicString::ConstructFromLiteral);
>+ static NeverDestroyed<AtomString> availableString("available", AtomString::ConstructFromLiteral);
>+ static NeverDestroyed<AtomString> notAvailableString("not-available", AtomString::ConstructFromLiteral);
> 
> return available ? availableString : notAvailableString;
> }
> 
>-WebKitPlaybackTargetAvailabilityEvent::WebKitPlaybackTargetAvailabilityEvent(const AtomicString& eventType, bool available)
>+WebKitPlaybackTargetAvailabilityEvent::WebKitPlaybackTargetAvailabilityEvent(const AtomString& eventType, bool available)
> : Event(eventType, CanBubble::No, IsCancelable::No)
> , m_availability(stringForPlaybackTargetAvailability(available))
> {
> }
> 
>-WebKitPlaybackTargetAvailabilityEvent::WebKitPlaybackTargetAvailabilityEvent(const AtomicString& eventType, const Init& initializer, IsTrusted isTrusted)
>+WebKitPlaybackTargetAvailabilityEvent::WebKitPlaybackTargetAvailabilityEvent(const AtomString& eventType, const Init& initializer, IsTrusted isTrusted)
> : Event(eventType, initializer, isTrusted)
> , m_availability(initializer.availability)
> {
>diff --git a/Source/WebCore/Modules/airplay/WebKitPlaybackTargetAvailabilityEvent.h b/Source/WebCore/Modules/airplay/WebKitPlaybackTargetAvailabilityEvent.h
>index 36cb6d1a3c06ce13e508f567a0720afa84f17d45..0ad355ea2b062fcb65d2a90b61685349ccc10cd3 100644
>--- a/Source/WebCore/Modules/airplay/WebKitPlaybackTargetAvailabilityEvent.h
>+++ b/Source/WebCore/Modules/airplay/WebKitPlaybackTargetAvailabilityEvent.h
>@@ -34,7 +34,7 @@ namespace WebCore {
> class WebKitPlaybackTargetAvailabilityEvent : public Event {
> public:
> 
>- static Ref<WebKitPlaybackTargetAvailabilityEvent> create(const AtomicString& eventType, bool available)
>+ static Ref<WebKitPlaybackTargetAvailabilityEvent> create(const AtomString& eventType, bool available)
> {
> return adoptRef(*new WebKitPlaybackTargetAvailabilityEvent(eventType, available));
> }
>@@ -43,7 +43,7 @@ public:
> String availability;
> };
> 
>- static Ref<WebKitPlaybackTargetAvailabilityEvent> create(const AtomicString& eventType, const Init& initializer, IsTrusted isTrusted = IsTrusted::No)
>+ static Ref<WebKitPlaybackTargetAvailabilityEvent> create(const AtomString& eventType, const Init& initializer, IsTrusted isTrusted = IsTrusted::No)
> {
> return adoptRef(*new WebKitPlaybackTargetAvailabilityEvent(eventType, initializer, isTrusted));
> }
>@@ -53,8 +53,8 @@ public:
> EventInterface eventInterface() const override { return WebKitPlaybackTargetAvailabilityEventInterfaceType; }
> 
> private:
>- explicit WebKitPlaybackTargetAvailabilityEvent(const AtomicString& eventType, bool available);
>- WebKitPlaybackTargetAvailabilityEvent(const AtomicString& eventType, const Init&, IsTrusted);
>+ explicit WebKitPlaybackTargetAvailabilityEvent(const AtomString& eventType, bool available);
>+ WebKitPlaybackTargetAvailabilityEvent(const AtomString& eventType, const Init&, IsTrusted);
> 
> String m_availability;
> };
>diff --git a/Source/WebCore/Modules/applepay/ApplePayPaymentAuthorizedEvent.cpp b/Source/WebCore/Modules/applepay/ApplePayPaymentAuthorizedEvent.cpp
>index b797070000d3598f27bddfae77efe433a129d2ba..df48375fb1c93ea884e190abb41200c10f446889 100644
>--- a/Source/WebCore/Modules/applepay/ApplePayPaymentAuthorizedEvent.cpp
>+++ b/Source/WebCore/Modules/applepay/ApplePayPaymentAuthorizedEvent.cpp
>@@ -32,7 +32,7 @@
> 
> namespace WebCore {
> 
>-ApplePayPaymentAuthorizedEvent::ApplePayPaymentAuthorizedEvent(const AtomicString& type, unsigned version, const Payment& payment)
>+ApplePayPaymentAuthorizedEvent::ApplePayPaymentAuthorizedEvent(const AtomString& type, unsigned version, const Payment& payment)
> : Event(type, CanBubble::No, IsCancelable::No)
> , m_payment(payment.toApplePayPayment(version))
> {
>diff --git a/Source/WebCore/Modules/applepay/ApplePayPaymentAuthorizedEvent.h b/Source/WebCore/Modules/applepay/ApplePayPaymentAuthorizedEvent.h
>index 2bc032dca5901524520ca9439657067082f7ab00..085d836903d3d3d8c807d7b76a4213944e845303 100644
>--- a/Source/WebCore/Modules/applepay/ApplePayPaymentAuthorizedEvent.h
>+++ b/Source/WebCore/Modules/applepay/ApplePayPaymentAuthorizedEvent.h
>@@ -36,7 +36,7 @@ class Payment;
> 
> class ApplePayPaymentAuthorizedEvent final : public Event {
> public:
>- static Ref<ApplePayPaymentAuthorizedEvent> create(const AtomicString& type, unsigned version, const Payment& payment)
>+ static Ref<ApplePayPaymentAuthorizedEvent> create(const AtomString& type, unsigned version, const Payment& payment)
> {
> return adoptRef(*new ApplePayPaymentAuthorizedEvent(type, version, payment));
> }
>@@ -46,7 +46,7 @@ public:
> const ApplePayPayment& payment() const { return m_payment; }
> 
> private:
>- ApplePayPaymentAuthorizedEvent(const AtomicString& type, unsigned version, const Payment&);
>+ ApplePayPaymentAuthorizedEvent(const AtomString& type, unsigned version, const Payment&);
> 
> // Event.
> EventInterface eventInterface() const override;
>diff --git a/Source/WebCore/Modules/applepay/ApplePayPaymentMethodSelectedEvent.cpp b/Source/WebCore/Modules/applepay/ApplePayPaymentMethodSelectedEvent.cpp
>index 8126e85cd8409f1e7f95f10fe75b264db960f7dc..450e91c5e861cf6e241cb4872525b3d364c43067 100644
>--- a/Source/WebCore/Modules/applepay/ApplePayPaymentMethodSelectedEvent.cpp
>+++ b/Source/WebCore/Modules/applepay/ApplePayPaymentMethodSelectedEvent.cpp
>@@ -32,7 +32,7 @@
> 
> namespace WebCore {
> 
>-ApplePayPaymentMethodSelectedEvent::ApplePayPaymentMethodSelectedEvent(const AtomicString& type, const PaymentMethod& paymentMethod)
>+ApplePayPaymentMethodSelectedEvent::ApplePayPaymentMethodSelectedEvent(const AtomString& type, const PaymentMethod& paymentMethod)
> : Event(type, CanBubble::No, IsCancelable::No)
> , m_paymentMethod(paymentMethod.toApplePayPaymentMethod())
> {
>diff --git a/Source/WebCore/Modules/applepay/ApplePayPaymentMethodSelectedEvent.h b/Source/WebCore/Modules/applepay/ApplePayPaymentMethodSelectedEvent.h
>index 3ac1a3c41fc8d05f55b6c5e860a2733227049ce0..81a2a4edaf55309a52be51af29042015bfd95734 100644
>--- a/Source/WebCore/Modules/applepay/ApplePayPaymentMethodSelectedEvent.h
>+++ b/Source/WebCore/Modules/applepay/ApplePayPaymentMethodSelectedEvent.h
>@@ -36,7 +36,7 @@ class PaymentMethod;
> 
> class ApplePayPaymentMethodSelectedEvent : public Event {
> public:
>- static Ref<ApplePayPaymentMethodSelectedEvent> create(const AtomicString& type, const PaymentMethod& paymentMethod)
>+ static Ref<ApplePayPaymentMethodSelectedEvent> create(const AtomString& type, const PaymentMethod& paymentMethod)
> {
> return adoptRef(*new ApplePayPaymentMethodSelectedEvent(type, paymentMethod));
> }
>@@ -46,7 +46,7 @@ public:
> const ApplePayPaymentMethod& paymentMethod() { return m_paymentMethod; }
> 
> protected:
>- ApplePayPaymentMethodSelectedEvent(const AtomicString& type, const PaymentMethod&);
>+ ApplePayPaymentMethodSelectedEvent(const AtomString& type, const PaymentMethod&);
> 
> // Event.
> EventInterface eventInterface() const override;
>diff --git a/Source/WebCore/Modules/applepay/ApplePayShippingContactSelectedEvent.cpp b/Source/WebCore/Modules/applepay/ApplePayShippingContactSelectedEvent.cpp
>index eca02d7e43f7179ca72f101384224998f5e3b5c4..feea0d1ee675855758d74be61cd48f469064a4a1 100644
>--- a/Source/WebCore/Modules/applepay/ApplePayShippingContactSelectedEvent.cpp
>+++ b/Source/WebCore/Modules/applepay/ApplePayShippingContactSelectedEvent.cpp
>@@ -32,7 +32,7 @@
> 
> namespace WebCore {
> 
>-ApplePayShippingContactSelectedEvent::ApplePayShippingContactSelectedEvent(const AtomicString& type, unsigned version, const PaymentContact& shippingContact)
>+ApplePayShippingContactSelectedEvent::ApplePayShippingContactSelectedEvent(const AtomString& type, unsigned version, const PaymentContact& shippingContact)
> : Event(type, CanBubble::No, IsCancelable::No)
> , m_shippingContact(shippingContact.toApplePayPaymentContact(version))
> {
>diff --git a/Source/WebCore/Modules/applepay/ApplePayShippingContactSelectedEvent.h b/Source/WebCore/Modules/applepay/ApplePayShippingContactSelectedEvent.h
>index 253efd9934d154af9bdc349bd11c5a11fb33e250..19a153db3a7f3d58749b354444fc1467dd270a7b 100644
>--- a/Source/WebCore/Modules/applepay/ApplePayShippingContactSelectedEvent.h
>+++ b/Source/WebCore/Modules/applepay/ApplePayShippingContactSelectedEvent.h
>@@ -36,7 +36,7 @@ class PaymentContact;
> 
> class ApplePayShippingContactSelectedEvent final : public Event {
> public:
>- static Ref<ApplePayShippingContactSelectedEvent> create(const AtomicString& type, unsigned version, const PaymentContact& shippingContact)
>+ static Ref<ApplePayShippingContactSelectedEvent> create(const AtomString& type, unsigned version, const PaymentContact& shippingContact)
> {
> return adoptRef(*new ApplePayShippingContactSelectedEvent(type, version, shippingContact));
> }
>@@ -46,7 +46,7 @@ public:
> const ApplePayPaymentContact& shippingContact() const { return m_shippingContact; }
> 
> private:
>- ApplePayShippingContactSelectedEvent(const AtomicString& type, unsigned version, const PaymentContact&);
>+ ApplePayShippingContactSelectedEvent(const AtomString& type, unsigned version, const PaymentContact&);
> 
> // Event.
> EventInterface eventInterface() const override;
>diff --git a/Source/WebCore/Modules/applepay/ApplePayShippingMethodSelectedEvent.cpp b/Source/WebCore/Modules/applepay/ApplePayShippingMethodSelectedEvent.cpp
>index d6304b92da0dd3f49fcf7cb6ec47bb602ce85bb4..b8e7d5cb94390837c46c9e6c1f4f06261e6ad185 100644
>--- a/Source/WebCore/Modules/applepay/ApplePayShippingMethodSelectedEvent.cpp
>+++ b/Source/WebCore/Modules/applepay/ApplePayShippingMethodSelectedEvent.cpp
>@@ -43,7 +43,7 @@ static inline ApplePayShippingMethod convert(const ApplePaySessionPaymentRequest
> return convertedMethod; 
> }
> 
>-ApplePayShippingMethodSelectedEvent::ApplePayShippingMethodSelectedEvent(const AtomicString& type, const ApplePaySessionPaymentRequest::ShippingMethod& shippingMethod)
>+ApplePayShippingMethodSelectedEvent::ApplePayShippingMethodSelectedEvent(const AtomString& type, const ApplePaySessionPaymentRequest::ShippingMethod& shippingMethod)
> : Event(type, CanBubble::No, IsCancelable::No)
> , m_shippingMethod(convert(shippingMethod))
> {
>diff --git a/Source/WebCore/Modules/applepay/ApplePayShippingMethodSelectedEvent.h b/Source/WebCore/Modules/applepay/ApplePayShippingMethodSelectedEvent.h
>index ec1c64eef2056cc21153bd6f257ba59f318b6b00..17bf1dfa83e6ca512a6bc718a62fc4563ea99125 100644
>--- a/Source/WebCore/Modules/applepay/ApplePayShippingMethodSelectedEvent.h
>+++ b/Source/WebCore/Modules/applepay/ApplePayShippingMethodSelectedEvent.h
>@@ -35,7 +35,7 @@ namespace WebCore {
> 
> class ApplePayShippingMethodSelectedEvent final : public Event {
> public:
>- static Ref<ApplePayShippingMethodSelectedEvent> create(const AtomicString& type, const ApplePaySessionPaymentRequest::ShippingMethod& shippingMethod)
>+ static Ref<ApplePayShippingMethodSelectedEvent> create(const AtomString& type, const ApplePaySessionPaymentRequest::ShippingMethod& shippingMethod)
> {
> return adoptRef(*new ApplePayShippingMethodSelectedEvent(type, shippingMethod));
> }
>@@ -45,7 +45,7 @@ public:
> const ApplePayShippingMethod& shippingMethod() const { return m_shippingMethod; }
> 
> private:
>- ApplePayShippingMethodSelectedEvent(const AtomicString& type, const ApplePaySessionPaymentRequest::ShippingMethod&);
>+ ApplePayShippingMethodSelectedEvent(const AtomString& type, const ApplePaySessionPaymentRequest::ShippingMethod&);
> 
> // Event.
> EventInterface eventInterface() const override;
>diff --git a/Source/WebCore/Modules/applepay/ApplePayValidateMerchantEvent.cpp b/Source/WebCore/Modules/applepay/ApplePayValidateMerchantEvent.cpp
>index b164b14b27fee86fc20dd5f1d8b90a2dc1ae93d5..f6bd722b05cc6e42e8e11721698bfc992bd107ea 100644
>--- a/Source/WebCore/Modules/applepay/ApplePayValidateMerchantEvent.cpp
>+++ b/Source/WebCore/Modules/applepay/ApplePayValidateMerchantEvent.cpp
>@@ -30,7 +30,7 @@
> 
> namespace WebCore {
> 
>-ApplePayValidateMerchantEvent::ApplePayValidateMerchantEvent(const AtomicString& type, URL&& validationURL)
>+ApplePayValidateMerchantEvent::ApplePayValidateMerchantEvent(const AtomString& type, URL&& validationURL)
> : Event(type, CanBubble::No, IsCancelable::No)
> , m_validationURL(WTFMove(validationURL))
> {
>diff --git a/Source/WebCore/Modules/applepay/ApplePayValidateMerchantEvent.h b/Source/WebCore/Modules/applepay/ApplePayValidateMerchantEvent.h
>index 3aa22f5b82d6c2c180ece814585d8510894b1b4f..11d357e5915717eddec95cc9697850857de025c8 100644
>--- a/Source/WebCore/Modules/applepay/ApplePayValidateMerchantEvent.h
>+++ b/Source/WebCore/Modules/applepay/ApplePayValidateMerchantEvent.h
>@@ -34,7 +34,7 @@ namespace WebCore {
> 
> class ApplePayValidateMerchantEvent : public Event {
> public:
>- static Ref<ApplePayValidateMerchantEvent> create(const AtomicString& type, URL&& validationURL)
>+ static Ref<ApplePayValidateMerchantEvent> create(const AtomString& type, URL&& validationURL)
> {
> return adoptRef(*new ApplePayValidateMerchantEvent(type, WTFMove(validationURL)));
> }
>@@ -44,7 +44,7 @@ public:
> const String& validationURL() const { return m_validationURL.string(); }
> 
> protected:
>- ApplePayValidateMerchantEvent(const AtomicString& type, URL&& validationURL);
>+ ApplePayValidateMerchantEvent(const AtomString& type, URL&& validationURL);
> 
> // Event.
> EventInterface eventInterface() const override;
>diff --git a/Source/WebCore/Modules/encryptedmedia/CDM.cpp b/Source/WebCore/Modules/encryptedmedia/CDM.cpp
>index ac066bd959709174da2700e980ddfdf7af8e9fb9..6038add838aab264036932201164e3667150a25e 100644
>--- a/Source/WebCore/Modules/encryptedmedia/CDM.cpp
>+++ b/Source/WebCore/Modules/encryptedmedia/CDM.cpp
>@@ -609,17 +609,17 @@ bool CDM::supportsSessions() const
> return m_private && m_private->supportsSessions();
> }
> 
>-bool CDM::supportsInitDataType(const AtomicString& initDataType) const
>+bool CDM::supportsInitDataType(const AtomString& initDataType) const
> {
> return m_private && m_private->supportsInitDataType(initDataType);
> }
> 
>-RefPtr<SharedBuffer> CDM::sanitizeInitData(const AtomicString& initDataType, const SharedBuffer& initData)
>+RefPtr<SharedBuffer> CDM::sanitizeInitData(const AtomString& initDataType, const SharedBuffer& initData)
> {
> return InitDataRegistry::shared().sanitizeInitData(initDataType, initData);
> }
> 
>-bool CDM::supportsInitData(const AtomicString& initDataType, const SharedBuffer& initData)
>+bool CDM::supportsInitData(const AtomString& initDataType, const SharedBuffer& initData)
> {
> return m_private && m_private->supportsInitData(initDataType, initData);
> }
>diff --git a/Source/WebCore/Modules/encryptedmedia/CDM.h b/Source/WebCore/Modules/encryptedmedia/CDM.h
>index 2e7fa187b4e67ad06e516ea3f54ad44554c5548b..ae98325f6ad11ff79ac6d174c6edaa8bd45c9d30 100644
>--- a/Source/WebCore/Modules/encryptedmedia/CDM.h
>+++ b/Source/WebCore/Modules/encryptedmedia/CDM.h
>@@ -66,10 +66,10 @@ public:
> RefPtr<CDMInstance> createInstance();
> bool supportsServerCertificates() const;
> bool supportsSessions() const;
>- bool supportsInitDataType(const AtomicString&) const;
>+ bool supportsInitDataType(const AtomString&) const;
> 
>- RefPtr<SharedBuffer> sanitizeInitData(const AtomicString& initDataType, const SharedBuffer&);
>- bool supportsInitData(const AtomicString& initDataType, const SharedBuffer&);
>+ RefPtr<SharedBuffer> sanitizeInitData(const AtomString& initDataType, const SharedBuffer&);
>+ bool supportsInitData(const AtomString& initDataType, const SharedBuffer&);
> 
> RefPtr<SharedBuffer> sanitizeResponse(const SharedBuffer&);
> 
>diff --git a/Source/WebCore/Modules/encryptedmedia/InitDataRegistry.cpp b/Source/WebCore/Modules/encryptedmedia/InitDataRegistry.cpp
>index 3b2f81d6d3796dea63fe1fcab7c302697b9a1870..4bf71494d9b79df1f0e20405693e561c0c70ccd8 100644
>--- a/Source/WebCore/Modules/encryptedmedia/InitDataRegistry.cpp
>+++ b/Source/WebCore/Modules/encryptedmedia/InitDataRegistry.cpp
>@@ -206,7 +206,7 @@ InitDataRegistry::InitDataRegistry()
> 
> InitDataRegistry::~InitDataRegistry() = default;
> 
>-RefPtr<SharedBuffer> InitDataRegistry::sanitizeInitData(const AtomicString& initDataType, const SharedBuffer& buffer)
>+RefPtr<SharedBuffer> InitDataRegistry::sanitizeInitData(const AtomString& initDataType, const SharedBuffer& buffer)
> {
> auto iter = m_types.find(initDataType);
> if (iter == m_types.end() || !iter->value.sanitizeInitData)
>@@ -214,7 +214,7 @@ RefPtr<SharedBuffer> InitDataRegistry::sanitizeInitData(const AtomicString& init
> return iter->value.sanitizeInitData(buffer);
> }
> 
>-Optional<Vector<Ref<SharedBuffer>>> InitDataRegistry::extractKeyIDs(const AtomicString& initDataType, const SharedBuffer& buffer)
>+Optional<Vector<Ref<SharedBuffer>>> InitDataRegistry::extractKeyIDs(const AtomString& initDataType, const SharedBuffer& buffer)
> {
> auto iter = m_types.find(initDataType);
> if (iter == m_types.end() || !iter->value.sanitizeInitData)
>@@ -222,7 +222,7 @@ Optional<Vector<Ref<SharedBuffer>>> InitDataRegistry::extractKeyIDs(const Atomic
> return iter->value.extractKeyIDs(buffer);
> }
> 
>-void InitDataRegistry::registerInitDataType(const AtomicString& initDataType, InitDataTypeCallbacks&& callbacks)
>+void InitDataRegistry::registerInitDataType(const AtomString& initDataType, InitDataTypeCallbacks&& callbacks)
> {
> ASSERT(!m_types.contains(initDataType));
> m_types.set(initDataType, WTFMove(callbacks));
>diff --git a/Source/WebCore/Modules/encryptedmedia/InitDataRegistry.h b/Source/WebCore/Modules/encryptedmedia/InitDataRegistry.h
>index 054d3770e47538f0616647955e6ea977d6a07454..1f7930b99d20c3fd5ed47673bf6ed45b086c8416 100644
>--- a/Source/WebCore/Modules/encryptedmedia/InitDataRegistry.h
>+++ b/Source/WebCore/Modules/encryptedmedia/InitDataRegistry.h
>@@ -33,8 +33,8 @@
> #include <wtf/Ref.h>
> #include <wtf/RefPtr.h>
> #include <wtf/Vector.h>
>-#include <wtf/text/AtomicString.h>
>-#include <wtf/text/AtomicStringHash.h>
>+#include <wtf/text/AtomString.h>
>+#include <wtf/text/AtomStringHash.h>
> 
> namespace WebCore {
> 
>@@ -45,8 +45,8 @@ public:
> WEBCORE_EXPORT static InitDataRegistry& shared();
> friend class NeverDestroyed<InitDataRegistry>;
> 
>- RefPtr<SharedBuffer> sanitizeInitData(const AtomicString& initDataType, const SharedBuffer&);
>- WEBCORE_EXPORT Optional<Vector<Ref<SharedBuffer>>> extractKeyIDs(const AtomicString& initDataType, const SharedBuffer&);
>+ RefPtr<SharedBuffer> sanitizeInitData(const AtomString& initDataType, const SharedBuffer&);
>+ WEBCORE_EXPORT Optional<Vector<Ref<SharedBuffer>>> extractKeyIDs(const AtomString& initDataType, const SharedBuffer&);
> 
> struct InitDataTypeCallbacks {
> using SanitizeInitDataCallback = Function<RefPtr<SharedBuffer>(const SharedBuffer&)>;
>@@ -55,13 +55,13 @@ public:
> SanitizeInitDataCallback sanitizeInitData;
> ExtractKeyIDsCallback extractKeyIDs;
> };
>- void registerInitDataType(const AtomicString& initDataType, InitDataTypeCallbacks&&);
>+ void registerInitDataType(const AtomString& initDataType, InitDataTypeCallbacks&&);
> 
> private:
> InitDataRegistry();
> ~InitDataRegistry();
> 
>- HashMap<AtomicString, InitDataTypeCallbacks> m_types;
>+ HashMap<AtomString, InitDataTypeCallbacks> m_types;
> };
> 
> }
>diff --git a/Source/WebCore/Modules/encryptedmedia/MediaKeyMessageEvent.cpp b/Source/WebCore/Modules/encryptedmedia/MediaKeyMessageEvent.cpp
>index 2b39ec4bfeb43881aa8aa522909bbf5e09f96ebd..ff3252a0fd840ca2d1710d90f2d6f9d9877ef9e3 100644
>--- a/Source/WebCore/Modules/encryptedmedia/MediaKeyMessageEvent.cpp
>+++ b/Source/WebCore/Modules/encryptedmedia/MediaKeyMessageEvent.cpp
>@@ -33,7 +33,7 @@
> 
> namespace WebCore {
> 
>-MediaKeyMessageEvent::MediaKeyMessageEvent(const AtomicString& type, const MediaKeyMessageEvent::Init& initializer, IsTrusted isTrusted)
>+MediaKeyMessageEvent::MediaKeyMessageEvent(const AtomString& type, const MediaKeyMessageEvent::Init& initializer, IsTrusted isTrusted)
> : Event(type, initializer, isTrusted)
> , m_messageType(initializer.messageType)
> , m_message(initializer.message)
>diff --git a/Source/WebCore/Modules/encryptedmedia/MediaKeyMessageEvent.h b/Source/WebCore/Modules/encryptedmedia/MediaKeyMessageEvent.h
>index 51932217a9f48ac2b2b2de7512b161c9e77ffe9a..93f30604d6d8b655223018f44285ac4320eefe58 100644
>--- a/Source/WebCore/Modules/encryptedmedia/MediaKeyMessageEvent.h
>+++ b/Source/WebCore/Modules/encryptedmedia/MediaKeyMessageEvent.h
>@@ -44,7 +44,7 @@ public:
> 
> virtual ~MediaKeyMessageEvent();
> 
>- static Ref<MediaKeyMessageEvent> create(const AtomicString& type, const MediaKeyMessageEventInit& initializer, IsTrusted isTrusted = IsTrusted::No)
>+ static Ref<MediaKeyMessageEvent> create(const AtomString& type, const MediaKeyMessageEventInit& initializer, IsTrusted isTrusted = IsTrusted::No)
> {
> return adoptRef(*new MediaKeyMessageEvent(type, initializer, isTrusted));
> }
>@@ -53,7 +53,7 @@ public:
> RefPtr<JSC::ArrayBuffer> message() const { return m_message; }
> 
> private:
>- MediaKeyMessageEvent(const AtomicString&, const MediaKeyMessageEventInit&, IsTrusted);
>+ MediaKeyMessageEvent(const AtomString&, const MediaKeyMessageEventInit&, IsTrusted);
> 
> // Event
> EventInterface eventInterface() const override;
>diff --git a/Source/WebCore/Modules/encryptedmedia/MediaKeySession.cpp b/Source/WebCore/Modules/encryptedmedia/MediaKeySession.cpp
>index 612a2bdf7ee8d4732068fa21de6fd947d7d17835..720fc74d9498dc9b4d75e936f34a4984e1f61737 100644
>--- a/Source/WebCore/Modules/encryptedmedia/MediaKeySession.cpp
>+++ b/Source/WebCore/Modules/encryptedmedia/MediaKeySession.cpp
>@@ -118,7 +118,7 @@ Ref<MediaKeyStatusMap> MediaKeySession::keyStatuses() const
> return m_keyStatuses.copyRef();
> }
> 
>-void MediaKeySession::generateRequest(const AtomicString& initDataType, const BufferSource& initData, Ref<DeferredPromise>&& promise)
>+void MediaKeySession::generateRequest(const AtomString& initDataType, const BufferSource& initData, Ref<DeferredPromise>&& promise)
> {
> // https://w3c.github.io/encrypted-media/#dom-mediakeysession-generaterequest
> // W3C Editor's Draft 09 November 2016
>diff --git a/Source/WebCore/Modules/encryptedmedia/MediaKeySession.h b/Source/WebCore/Modules/encryptedmedia/MediaKeySession.h
>index ded2dde106b74332cf38a0af32ce6e84d0ef32af..be8c0dd6bd38c6a11bcd9bc5ca95ff1bc3e44dc8 100644
>--- a/Source/WebCore/Modules/encryptedmedia/MediaKeySession.h
>+++ b/Source/WebCore/Modules/encryptedmedia/MediaKeySession.h
>@@ -67,7 +67,7 @@ public:
> double expiration() const;
> Ref<MediaKeyStatusMap> keyStatuses() const;
> 
>- void generateRequest(const AtomicString&, const BufferSource&, Ref<DeferredPromise>&&);
>+ void generateRequest(const AtomString&, const BufferSource&, Ref<DeferredPromise>&&);
> void load(const String&, Ref<DeferredPromise>&&);
> void update(const BufferSource&, Ref<DeferredPromise>&&);
> void close(Ref<DeferredPromise>&&);
>diff --git a/Source/WebCore/Modules/encryptedmedia/legacy/WebKitMediaKeyMessageEvent.cpp b/Source/WebCore/Modules/encryptedmedia/legacy/WebKitMediaKeyMessageEvent.cpp
>index 84113f58298202379ecc6fd64bd8e5dabf593aca..424cc280fb56d959daf1451b8634b947972aa2f2 100644
>--- a/Source/WebCore/Modules/encryptedmedia/legacy/WebKitMediaKeyMessageEvent.cpp
>+++ b/Source/WebCore/Modules/encryptedmedia/legacy/WebKitMediaKeyMessageEvent.cpp
>@@ -32,7 +32,7 @@
> 
> namespace WebCore {
> 
>-WebKitMediaKeyMessageEvent::WebKitMediaKeyMessageEvent(const AtomicString& type, Uint8Array* message, const String& destinationURL)
>+WebKitMediaKeyMessageEvent::WebKitMediaKeyMessageEvent(const AtomString& type, Uint8Array* message, const String& destinationURL)
> : Event(type, CanBubble::No, IsCancelable::No)
> , m_message(message)
> , m_destinationURL(destinationURL)
>@@ -40,7 +40,7 @@ WebKitMediaKeyMessageEvent::WebKitMediaKeyMessageEvent(const AtomicString& type,
> }
> 
> 
>-WebKitMediaKeyMessageEvent::WebKitMediaKeyMessageEvent(const AtomicString& type, const Init& initializer, IsTrusted isTrusted)
>+WebKitMediaKeyMessageEvent::WebKitMediaKeyMessageEvent(const AtomString& type, const Init& initializer, IsTrusted isTrusted)
> : Event(type, initializer, isTrusted)
> , m_message(initializer.message)
> , m_destinationURL(initializer.destinationURL)
>diff --git a/Source/WebCore/Modules/encryptedmedia/legacy/WebKitMediaKeyMessageEvent.h b/Source/WebCore/Modules/encryptedmedia/legacy/WebKitMediaKeyMessageEvent.h
>index 51946f213ed34c80f18ea0bcfd3ea44dcb855d0f..c262e4d5a11759348f94ece40da0379320ed195b 100644
>--- a/Source/WebCore/Modules/encryptedmedia/legacy/WebKitMediaKeyMessageEvent.h
>+++ b/Source/WebCore/Modules/encryptedmedia/legacy/WebKitMediaKeyMessageEvent.h
>@@ -37,7 +37,7 @@ class WebKitMediaKeyMessageEvent : public Event {
> public:
> virtual ~WebKitMediaKeyMessageEvent();
> 
>- static Ref<WebKitMediaKeyMessageEvent> create(const AtomicString& type, Uint8Array* message, const String& destinationURL)
>+ static Ref<WebKitMediaKeyMessageEvent> create(const AtomString& type, Uint8Array* message, const String& destinationURL)
> {
> return adoptRef(*new WebKitMediaKeyMessageEvent(type, message, destinationURL));
> }
>@@ -47,7 +47,7 @@ public:
> String destinationURL;
> };
> 
>- static Ref<WebKitMediaKeyMessageEvent> create(const AtomicString& type, const Init& initializer, IsTrusted isTrusted = IsTrusted::No)
>+ static Ref<WebKitMediaKeyMessageEvent> create(const AtomString& type, const Init& initializer, IsTrusted isTrusted = IsTrusted::No)
> {
> return adoptRef(*new WebKitMediaKeyMessageEvent(type, initializer, isTrusted));
> }
>@@ -58,8 +58,8 @@ public:
> String destinationURL() const { return m_destinationURL; }
> 
> private:
>- WebKitMediaKeyMessageEvent(const AtomicString& type, Uint8Array* message, const String& destinationURL);
>- WebKitMediaKeyMessageEvent(const AtomicString& type, const Init&, IsTrusted);
>+ WebKitMediaKeyMessageEvent(const AtomString& type, Uint8Array* message, const String& destinationURL);
>+ WebKitMediaKeyMessageEvent(const AtomString& type, const Init&, IsTrusted);
> 
> RefPtr<Uint8Array> m_message;
> String m_destinationURL;
>diff --git a/Source/WebCore/Modules/encryptedmedia/legacy/WebKitMediaKeyNeededEvent.cpp b/Source/WebCore/Modules/encryptedmedia/legacy/WebKitMediaKeyNeededEvent.cpp
>index 4bab062df36dea6c03d35bf86bb7975ae658de05..4868bbc580e9acf0cce12b79bf81aecef32cb30f 100644
>--- a/Source/WebCore/Modules/encryptedmedia/legacy/WebKitMediaKeyNeededEvent.cpp
>+++ b/Source/WebCore/Modules/encryptedmedia/legacy/WebKitMediaKeyNeededEvent.cpp
>@@ -32,13 +32,13 @@
> 
> namespace WebCore {
> 
>-WebKitMediaKeyNeededEvent::WebKitMediaKeyNeededEvent(const AtomicString& type, Uint8Array* initData)
>+WebKitMediaKeyNeededEvent::WebKitMediaKeyNeededEvent(const AtomString& type, Uint8Array* initData)
> : Event(type, CanBubble::No, IsCancelable::No)
> , m_initData(initData)
> {
> }
> 
>-WebKitMediaKeyNeededEvent::WebKitMediaKeyNeededEvent(const AtomicString& type, const Init& initializer, IsTrusted isTrusted)
>+WebKitMediaKeyNeededEvent::WebKitMediaKeyNeededEvent(const AtomString& type, const Init& initializer, IsTrusted isTrusted)
> : Event(type, initializer, isTrusted)
> , m_initData(initializer.initData)
> {
>diff --git a/Source/WebCore/Modules/encryptedmedia/legacy/WebKitMediaKeyNeededEvent.h b/Source/WebCore/Modules/encryptedmedia/legacy/WebKitMediaKeyNeededEvent.h
>index de487d5dfa5c5505c83446e08d8611c9acc40c1f..b1dd45a4c703e9175b7a09f9d7c2a3ef1ec9e4a3 100644
>--- a/Source/WebCore/Modules/encryptedmedia/legacy/WebKitMediaKeyNeededEvent.h
>+++ b/Source/WebCore/Modules/encryptedmedia/legacy/WebKitMediaKeyNeededEvent.h
>@@ -36,7 +36,7 @@ class WebKitMediaKeyNeededEvent : public Event {
> public:
> virtual ~WebKitMediaKeyNeededEvent();
> 
>- static Ref<WebKitMediaKeyNeededEvent> create(const AtomicString& type, Uint8Array* initData)
>+ static Ref<WebKitMediaKeyNeededEvent> create(const AtomString& type, Uint8Array* initData)
> {
> return adoptRef(*new WebKitMediaKeyNeededEvent(type, initData));
> }
>@@ -45,7 +45,7 @@ public:
> RefPtr<Uint8Array> initData;
> };
> 
>- static Ref<WebKitMediaKeyNeededEvent> create(const AtomicString& type, const Init& initializer, IsTrusted isTrusted = IsTrusted::No)
>+ static Ref<WebKitMediaKeyNeededEvent> create(const AtomString& type, const Init& initializer, IsTrusted isTrusted = IsTrusted::No)
> {
> return adoptRef(*new WebKitMediaKeyNeededEvent(type, initializer, isTrusted));
> }
>@@ -55,8 +55,8 @@ public:
> Uint8Array* initData() const { return m_initData.get(); }
> 
> private:
>- WebKitMediaKeyNeededEvent(const AtomicString& type, Uint8Array* initData);
>- WebKitMediaKeyNeededEvent(const AtomicString& type, const Init&, IsTrusted);
>+ WebKitMediaKeyNeededEvent(const AtomString& type, Uint8Array* initData);
>+ WebKitMediaKeyNeededEvent(const AtomString& type, const Init&, IsTrusted);
> 
> RefPtr<Uint8Array> m_initData;
> };
>diff --git a/Source/WebCore/Modules/gamepad/GamepadEvent.cpp b/Source/WebCore/Modules/gamepad/GamepadEvent.cpp
>index 68341943361b76f2c2f557581e9cb60e40549037..42498fdef5491826874991918fb431524023b00e 100644
>--- a/Source/WebCore/Modules/gamepad/GamepadEvent.cpp
>+++ b/Source/WebCore/Modules/gamepad/GamepadEvent.cpp
>@@ -29,13 +29,13 @@
> 
> namespace WebCore {
> 
>-GamepadEvent::GamepadEvent(const AtomicString& eventType, Gamepad& gamepad)
>+GamepadEvent::GamepadEvent(const AtomString& eventType, Gamepad& gamepad)
> : Event(eventType, CanBubble::No, IsCancelable::No)
> , m_gamepad(&gamepad)
> {
> }
> 
>-GamepadEvent::GamepadEvent(const AtomicString& eventType, const Init& initializer, IsTrusted isTrusted)
>+GamepadEvent::GamepadEvent(const AtomString& eventType, const Init& initializer, IsTrusted isTrusted)
> : Event(eventType, initializer, isTrusted)
> , m_gamepad(initializer.gamepad)
> {
>diff --git a/Source/WebCore/Modules/gamepad/GamepadEvent.h b/Source/WebCore/Modules/gamepad/GamepadEvent.h
>index 6d50778e58855f3f2965a6ee455e86271786214b..03efd5f0375dff6f489ae96b4ad78e2ae13a4021 100644
>--- a/Source/WebCore/Modules/gamepad/GamepadEvent.h
>+++ b/Source/WebCore/Modules/gamepad/GamepadEvent.h
>@@ -37,7 +37,7 @@ class GamepadEvent : public Event {
> public:
> ~GamepadEvent() = default;
> 
>- static Ref<GamepadEvent> create(const AtomicString& eventType, Gamepad& gamepad)
>+ static Ref<GamepadEvent> create(const AtomString& eventType, Gamepad& gamepad)
> {
> return adoptRef(*new GamepadEvent(eventType, gamepad));
> }
>@@ -46,7 +46,7 @@ public:
> RefPtr<Gamepad> gamepad;
> };
> 
>- static Ref<GamepadEvent> create(const AtomicString& eventType, const Init& initializer, IsTrusted isTrusted = IsTrusted::No)
>+ static Ref<GamepadEvent> create(const AtomString& eventType, const Init& initializer, IsTrusted isTrusted = IsTrusted::No)
> {
> return adoptRef(*new GamepadEvent(eventType, initializer, isTrusted));
> }
>@@ -56,8 +56,8 @@ public:
> EventInterface eventInterface() const override { return GamepadEventInterfaceType; }
> 
> private:
>- explicit GamepadEvent(const AtomicString& eventType, Gamepad&);
>- GamepadEvent(const AtomicString& eventType, const Init&, IsTrusted);
>+ explicit GamepadEvent(const AtomString& eventType, Gamepad&);
>+ GamepadEvent(const AtomString& eventType, const Init&, IsTrusted);
> 
> RefPtr<Gamepad> m_gamepad;
> };
>diff --git a/Source/WebCore/Modules/gamepad/GamepadManager.h b/Source/WebCore/Modules/gamepad/GamepadManager.h
>index 8bad72d83666227cd970ced2a166ba92dc121224..45e812adc543a14e71bab29733ec5fee2999a4e3 100644
>--- a/Source/WebCore/Modules/gamepad/GamepadManager.h
>+++ b/Source/WebCore/Modules/gamepad/GamepadManager.h
>@@ -30,7 +30,7 @@
> #include "GamepadProviderClient.h"
> #include <wtf/HashSet.h>
> #include <wtf/NeverDestroyed.h>
>-#include <wtf/text/AtomicString.h>
>+#include <wtf/text/AtomString.h>
> 
> namespace WebCore {
> 
>@@ -57,7 +57,7 @@ private:
> GamepadManager();
> 
> void makeGamepadVisible(PlatformGamepad&, HashSet<NavigatorGamepad*>&, HashSet<DOMWindow*>&);
>- void dispatchGamepadEvent(const WTF::AtomicString& eventName, PlatformGamepad&);
>+ void dispatchGamepadEvent(const WTF::AtomString& eventName, PlatformGamepad&);
> 
> void maybeStartMonitoringGamepads();
> void maybeStopMonitoringGamepads();
>diff --git a/Source/WebCore/Modules/indexeddb/IDBRequestCompletionEvent.cpp b/Source/WebCore/Modules/indexeddb/IDBRequestCompletionEvent.cpp
>index b972004efc5ca21a3867546b62d9ebb29ac3b5df..c96f9adeb24603b19ac3dd6158445094e1ea64ce 100644
>--- a/Source/WebCore/Modules/indexeddb/IDBRequestCompletionEvent.cpp
>+++ b/Source/WebCore/Modules/indexeddb/IDBRequestCompletionEvent.cpp
>@@ -30,7 +30,7 @@
> 
> namespace WebCore {
> 
>-IDBRequestCompletionEvent::IDBRequestCompletionEvent(const AtomicString& type, CanBubble canBubble, IsCancelable cancelable, IDBRequest& request)
>+IDBRequestCompletionEvent::IDBRequestCompletionEvent(const AtomString& type, CanBubble canBubble, IsCancelable cancelable, IDBRequest& request)
> : Event(type, canBubble, cancelable)
> , m_request(request)
> {
>diff --git a/Source/WebCore/Modules/indexeddb/IDBRequestCompletionEvent.h b/Source/WebCore/Modules/indexeddb/IDBRequestCompletionEvent.h
>index 32101eaca4908816786433fa6d0efa8e2b36c452..80fb18e769e6795eb5f089356c1486d0a2bc2bfe 100644
>--- a/Source/WebCore/Modules/indexeddb/IDBRequestCompletionEvent.h
>+++ b/Source/WebCore/Modules/indexeddb/IDBRequestCompletionEvent.h
>@@ -34,13 +34,13 @@ namespace WebCore {
> 
> class IDBRequestCompletionEvent : public Event {
> public:
>- static Ref<Event> create(const AtomicString& type, CanBubble canBubble, IsCancelable cancelable, IDBRequest& request)
>+ static Ref<Event> create(const AtomString& type, CanBubble canBubble, IsCancelable cancelable, IDBRequest& request)
> {
> return adoptRef(*new IDBRequestCompletionEvent(type, canBubble, cancelable, request));
> }
> 
> private:
>- IDBRequestCompletionEvent(const AtomicString& type, CanBubble, IsCancelable, IDBRequest&);
>+ IDBRequestCompletionEvent(const AtomString& type, CanBubble, IsCancelable, IDBRequest&);
> 
> Ref<IDBRequest> m_request;
> };
>diff --git a/Source/WebCore/Modules/indexeddb/IDBVersionChangeEvent.cpp b/Source/WebCore/Modules/indexeddb/IDBVersionChangeEvent.cpp
>index b6c5a86300e7a077319df0f818bd78fa29d209fa..005556b1d30f1c4d1d7de5ea78093a0979d0ede5 100644
>--- a/Source/WebCore/Modules/indexeddb/IDBVersionChangeEvent.cpp
>+++ b/Source/WebCore/Modules/indexeddb/IDBVersionChangeEvent.cpp
>@@ -30,7 +30,7 @@
> 
> namespace WebCore {
> 
>-IDBVersionChangeEvent::IDBVersionChangeEvent(const IDBResourceIdentifier& requestIdentifier, uint64_t oldVersion, uint64_t newVersion, const AtomicString& name)
>+IDBVersionChangeEvent::IDBVersionChangeEvent(const IDBResourceIdentifier& requestIdentifier, uint64_t oldVersion, uint64_t newVersion, const AtomString& name)
> : Event(name, CanBubble::No, IsCancelable::No)
> , m_requestIdentifier(requestIdentifier)
> , m_oldVersion(oldVersion)
>@@ -41,7 +41,7 @@ IDBVersionChangeEvent::IDBVersionChangeEvent(const IDBResourceIdentifier& reques
> m_newVersion = WTF::nullopt;
> }
> 
>-IDBVersionChangeEvent::IDBVersionChangeEvent(const AtomicString& name, const Init& init, IsTrusted isTrusted)
>+IDBVersionChangeEvent::IDBVersionChangeEvent(const AtomString& name, const Init& init, IsTrusted isTrusted)
> : Event(name, init, isTrusted)
> , m_oldVersion(init.oldVersion)
> , m_newVersion(init.newVersion)
>diff --git a/Source/WebCore/Modules/indexeddb/IDBVersionChangeEvent.h b/Source/WebCore/Modules/indexeddb/IDBVersionChangeEvent.h
>index e9218eba1626092194008de02185c0b3806340cf..433059d3f538b1762ce738253894591fc8011f09 100644
>--- a/Source/WebCore/Modules/indexeddb/IDBVersionChangeEvent.h
>+++ b/Source/WebCore/Modules/indexeddb/IDBVersionChangeEvent.h
>@@ -35,12 +35,12 @@ namespace WebCore {
> 
> class IDBVersionChangeEvent final : public Event {
> public:
>- static Ref<IDBVersionChangeEvent> create(uint64_t oldVersion, uint64_t newVersion, const AtomicString& eventType)
>+ static Ref<IDBVersionChangeEvent> create(uint64_t oldVersion, uint64_t newVersion, const AtomString& eventType)
> {
> return adoptRef(*new IDBVersionChangeEvent(IDBResourceIdentifier::emptyValue(), oldVersion, newVersion, eventType));
> }
> 
>- static Ref<IDBVersionChangeEvent> create(const IDBResourceIdentifier& requestIdentifier, uint64_t oldVersion, uint64_t newVersion, const AtomicString& eventType)
>+ static Ref<IDBVersionChangeEvent> create(const IDBResourceIdentifier& requestIdentifier, uint64_t oldVersion, uint64_t newVersion, const AtomString& eventType)
> {
> return adoptRef(*new IDBVersionChangeEvent(requestIdentifier, oldVersion, newVersion, eventType));
> }
>@@ -50,7 +50,7 @@ public:
> Optional<uint64_t> newVersion;
> };
> 
>- static Ref<IDBVersionChangeEvent> create(const AtomicString& type, const Init& initializer, IsTrusted isTrusted = IsTrusted::No)
>+ static Ref<IDBVersionChangeEvent> create(const AtomString& type, const Init& initializer, IsTrusted isTrusted = IsTrusted::No)
> {
> return adoptRef(*new IDBVersionChangeEvent(type, initializer, isTrusted));
> }
>@@ -63,8 +63,8 @@ public:
> Optional<uint64_t> newVersion() const { return m_newVersion; }
> 
> private:
>- IDBVersionChangeEvent(const IDBResourceIdentifier& requestIdentifier, uint64_t oldVersion, uint64_t newVersion, const AtomicString& eventType);
>- IDBVersionChangeEvent(const AtomicString&, const Init&, IsTrusted);
>+ IDBVersionChangeEvent(const IDBResourceIdentifier& requestIdentifier, uint64_t oldVersion, uint64_t newVersion, const AtomString& eventType);
>+ IDBVersionChangeEvent(const AtomString&, const Init&, IsTrusted);
> 
> EventInterface eventInterface() const;
> 
>diff --git a/Source/WebCore/Modules/mediacontrols/MediaControlsHost.cpp b/Source/WebCore/Modules/mediacontrols/MediaControlsHost.cpp
>index d01e013eddd3d7fd1cd55b03e9485a10fef162a3..10ff72fbb3dd54dd87e2f22278e7deb52c913be7 100644
>--- a/Source/WebCore/Modules/mediacontrols/MediaControlsHost.cpp
>+++ b/Source/WebCore/Modules/mediacontrols/MediaControlsHost.cpp
>@@ -44,27 +44,27 @@
> 
> namespace WebCore {
> 
>-const AtomicString& MediaControlsHost::automaticKeyword()
>+const AtomString& MediaControlsHost::automaticKeyword()
> {
>- static NeverDestroyed<const AtomicString> automatic("automatic", AtomicString::ConstructFromLiteral);
>+ static NeverDestroyed<const AtomString> automatic("automatic", AtomString::ConstructFromLiteral);
> return automatic;
> }
> 
>-const AtomicString& MediaControlsHost::forcedOnlyKeyword()
>+const AtomString& MediaControlsHost::forcedOnlyKeyword()
> {
>- static NeverDestroyed<const AtomicString> forcedOn("forced-only", AtomicString::ConstructFromLiteral);
>+ static NeverDestroyed<const AtomString> forcedOn("forced-only", AtomString::ConstructFromLiteral);
> return forcedOn;
> }
> 
>-const AtomicString& MediaControlsHost::alwaysOnKeyword()
>+const AtomString& MediaControlsHost::alwaysOnKeyword()
> {
>- static NeverDestroyed<const AtomicString> alwaysOn("always-on", AtomicString::ConstructFromLiteral);
>+ static NeverDestroyed<const AtomString> alwaysOn("always-on", AtomString::ConstructFromLiteral);
> return alwaysOn;
> }
> 
>-const AtomicString& MediaControlsHost::manualKeyword()
>+const AtomString& MediaControlsHost::manualKeyword()
> {
>- static NeverDestroyed<const AtomicString> alwaysOn("manual", AtomicString::ConstructFromLiteral);
>+ static NeverDestroyed<const AtomString> alwaysOn("manual", AtomString::ConstructFromLiteral);
> return alwaysOn;
> }
> 
>@@ -124,7 +124,7 @@ TextTrack* MediaControlsHost::captionMenuAutomaticItem()
> return TextTrack::captionMenuAutomaticItem();
> }
> 
>-AtomicString MediaControlsHost::captionDisplayMode() const
>+AtomString MediaControlsHost::captionDisplayMode() const
> {
> Page* page = m_mediaElement->document().page();
> if (!page)
>diff --git a/Source/WebCore/Modules/mediacontrols/MediaControlsHost.h b/Source/WebCore/Modules/mediacontrols/MediaControlsHost.h
>index 2f51ad2b69d1a9c013a606becc6f56b9f46a4833..ef5d0572ad4ac00f5b76a12dec379f1f284471e5 100644
>--- a/Source/WebCore/Modules/mediacontrols/MediaControlsHost.h
>+++ b/Source/WebCore/Modules/mediacontrols/MediaControlsHost.h
>@@ -47,10 +47,10 @@ public:
> static Ref<MediaControlsHost> create(HTMLMediaElement*);
> ~MediaControlsHost();
> 
>- static const AtomicString& automaticKeyword();
>- static const AtomicString& forcedOnlyKeyword();
>- static const AtomicString& alwaysOnKeyword();
>- static const AtomicString& manualKeyword();
>+ static const AtomString& automaticKeyword();
>+ static const AtomString& forcedOnlyKeyword();
>+ static const AtomString& alwaysOnKeyword();
>+ static const AtomString& manualKeyword();
> 
> Vector<RefPtr<TextTrack>> sortedTrackListForMenu(TextTrackList&);
> Vector<RefPtr<AudioTrack>> sortedTrackListForMenu(AudioTrackList&);
>@@ -60,7 +60,7 @@ public:
> 
> TextTrack* captionMenuOffItem();
> TextTrack* captionMenuAutomaticItem();
>- AtomicString captionDisplayMode() const;
>+ AtomString captionDisplayMode() const;
> void setSelectedTextTrack(TextTrack*);
> Element* textTrackContainer();
> void updateTextTrackContainer();
>diff --git a/Source/WebCore/Modules/mediarecorder/BlobEvent.cpp b/Source/WebCore/Modules/mediarecorder/BlobEvent.cpp
>index 3d9afa347e60c668715771685c10c5f42344fc46..b51798a70d63083a7bc48f6a957be66186c70a97 100644
>--- a/Source/WebCore/Modules/mediarecorder/BlobEvent.cpp
>+++ b/Source/WebCore/Modules/mediarecorder/BlobEvent.cpp
>@@ -32,23 +32,23 @@
> 
> namespace WebCore {
> 
>-Ref<BlobEvent> BlobEvent::create(const AtomicString& type, Init&& init, IsTrusted isTrusted)
>+Ref<BlobEvent> BlobEvent::create(const AtomString& type, Init&& init, IsTrusted isTrusted)
> {
> return adoptRef(*new BlobEvent(type, WTFMove(init), isTrusted));
> }
> 
>-Ref<BlobEvent> BlobEvent::create(const AtomicString& type, CanBubble canBubble, IsCancelable isCancelable, Ref<Blob>&& data)
>+Ref<BlobEvent> BlobEvent::create(const AtomString& type, CanBubble canBubble, IsCancelable isCancelable, Ref<Blob>&& data)
> {
> return adoptRef(*new BlobEvent(type, canBubble, isCancelable, WTFMove(data)));
> }
> 
>-BlobEvent::BlobEvent(const AtomicString& type, Init&& init, IsTrusted isTrusted)
>+BlobEvent::BlobEvent(const AtomString& type, Init&& init, IsTrusted isTrusted)
> : Event(type, init, isTrusted)
> , m_blob(init.data.releaseNonNull())
> {
> }
> 
>-BlobEvent::BlobEvent(const AtomicString& type, CanBubble canBubble, IsCancelable isCancelable, Ref<Blob>&& data)
>+BlobEvent::BlobEvent(const AtomString& type, CanBubble canBubble, IsCancelable isCancelable, Ref<Blob>&& data)
> : Event(type, canBubble, isCancelable)
> , m_blob(WTFMove(data))
> {
>diff --git a/Source/WebCore/Modules/mediarecorder/BlobEvent.h b/Source/WebCore/Modules/mediarecorder/BlobEvent.h
>index b63ad33d3602147babc30e299a362f5f36c9d0e8..54784f6f4af671481ea04a7bdc8c8a1f64555337 100644
>--- a/Source/WebCore/Modules/mediarecorder/BlobEvent.h
>+++ b/Source/WebCore/Modules/mediarecorder/BlobEvent.h
>@@ -39,14 +39,14 @@ public:
> double timecode;
> };
> 
>- static Ref<BlobEvent> create(const AtomicString&, Init&&, IsTrusted = IsTrusted::No);
>- static Ref<BlobEvent> create(const AtomicString&, CanBubble, IsCancelable, Ref<Blob>&&);
>+ static Ref<BlobEvent> create(const AtomString&, Init&&, IsTrusted = IsTrusted::No);
>+ static Ref<BlobEvent> create(const AtomString&, CanBubble, IsCancelable, Ref<Blob>&&);
> 
> Blob& data() const { return m_blob.get(); }
> 
> private:
>- BlobEvent(const AtomicString&, Init&&, IsTrusted);
>- BlobEvent(const AtomicString&, CanBubble, IsCancelable, Ref<Blob>&&);
>+ BlobEvent(const AtomString&, Init&&, IsTrusted);
>+ BlobEvent(const AtomString&, CanBubble, IsCancelable, Ref<Blob>&&);
> 
> // Event
> EventInterface eventInterface() const final;
>diff --git a/Source/WebCore/Modules/mediarecorder/MediaRecorderErrorEvent.cpp b/Source/WebCore/Modules/mediarecorder/MediaRecorderErrorEvent.cpp
>index f422ae808260b0e9eacb42225c3e73ba039675df..64f13cbd7ae2372df29dd3227a2d1b43f89389f4 100644
>--- a/Source/WebCore/Modules/mediarecorder/MediaRecorderErrorEvent.cpp
>+++ b/Source/WebCore/Modules/mediarecorder/MediaRecorderErrorEvent.cpp
>@@ -33,24 +33,24 @@
> namespace WebCore {
> 
> 
>-Ref<MediaRecorderErrorEvent> MediaRecorderErrorEvent::create(const AtomicString& type, Exception&& exception)
>+Ref<MediaRecorderErrorEvent> MediaRecorderErrorEvent::create(const AtomString& type, Exception&& exception)
> {
> return adoptRef(*new MediaRecorderErrorEvent(type, WTFMove(exception)));
> }
> 
>-Ref<MediaRecorderErrorEvent> MediaRecorderErrorEvent::create(const AtomicString& type, Init&& init, IsTrusted isTrusted)
>+Ref<MediaRecorderErrorEvent> MediaRecorderErrorEvent::create(const AtomString& type, Init&& init, IsTrusted isTrusted)
> {
> auto domError = init.error.releaseNonNull();
> return adoptRef(*new MediaRecorderErrorEvent(type, WTFMove(init), WTFMove(domError), isTrusted));
> }
> 
>-MediaRecorderErrorEvent::MediaRecorderErrorEvent(const AtomicString& type, Init&& init, Ref<DOMException>&& exception, IsTrusted isTrusted)
>+MediaRecorderErrorEvent::MediaRecorderErrorEvent(const AtomString& type, Init&& init, Ref<DOMException>&& exception, IsTrusted isTrusted)
> : Event(type, WTFMove(init), isTrusted)
> , m_domError(WTFMove(exception))
> {
> }
> 
>-MediaRecorderErrorEvent::MediaRecorderErrorEvent(const AtomicString& type, Exception&& exception)
>+MediaRecorderErrorEvent::MediaRecorderErrorEvent(const AtomString& type, Exception&& exception)
> : Event(type, Event::CanBubble::No, Event::IsCancelable::No)
> , m_domError(DOMException::create(exception))
> {
>diff --git a/Source/WebCore/Modules/mediarecorder/MediaRecorderErrorEvent.h b/Source/WebCore/Modules/mediarecorder/MediaRecorderErrorEvent.h
>index 891c3a30c32fd3efdd3af0d3faffdbe1cd0e7779..07fca2faf92c565806f2b4a8764e3c2bd5c3880f 100644
>--- a/Source/WebCore/Modules/mediarecorder/MediaRecorderErrorEvent.h
>+++ b/Source/WebCore/Modules/mediarecorder/MediaRecorderErrorEvent.h
>@@ -37,14 +37,14 @@ public:
> RefPtr<DOMException> error;
> };
> 
>- static Ref<MediaRecorderErrorEvent> create(const AtomicString&, Init&&, IsTrusted = IsTrusted::No);
>- static Ref<MediaRecorderErrorEvent> create(const AtomicString&, Exception&&);
>+ static Ref<MediaRecorderErrorEvent> create(const AtomString&, Init&&, IsTrusted = IsTrusted::No);
>+ static Ref<MediaRecorderErrorEvent> create(const AtomString&, Exception&&);
> 
> DOMException& error() const { return m_domError.get(); }
> 
> private:
>- MediaRecorderErrorEvent(const AtomicString&, Init&&, Ref<DOMException>&&, IsTrusted);
>- MediaRecorderErrorEvent(const AtomicString&, Exception&&);
>+ MediaRecorderErrorEvent(const AtomString&, Init&&, Ref<DOMException>&&, IsTrusted);
>+ MediaRecorderErrorEvent(const AtomString&, Exception&&);
> 
> // Event
> EventInterface eventInterface() const override;
>diff --git a/Source/WebCore/Modules/mediasource/MediaSource.cpp b/Source/WebCore/Modules/mediasource/MediaSource.cpp
>index 7e9363d5fae90d2c199c704215e4984b1864c292..d417a12169111215d542291e03c59d5d6e7eb3f4 100644
>--- a/Source/WebCore/Modules/mediasource/MediaSource.cpp
>+++ b/Source/WebCore/Modules/mediasource/MediaSource.cpp
>@@ -1073,7 +1073,7 @@ ExceptionOr<Ref<SourceBufferPrivate>> MediaSource::createSourceBufferPrivate(con
> return Exception { QuotaExceededError };
> }
> 
>-void MediaSource::scheduleEvent(const AtomicString& eventName)
>+void MediaSource::scheduleEvent(const AtomString& eventName)
> {
> DEBUG_LOG(LOGIDENTIFIER, "scheduling '", eventName, "'");
> 
>diff --git a/Source/WebCore/Modules/mediasource/MediaSource.h b/Source/WebCore/Modules/mediasource/MediaSource.h
>index f2ae440a820f2c8b1f77ac21e58bdf6206e4e2b0..fdc647b7acbf732c50cbee3ac1c023f81e5d09c1 100644
>--- a/Source/WebCore/Modules/mediasource/MediaSource.h
>+++ b/Source/WebCore/Modules/mediasource/MediaSource.h
>@@ -147,7 +147,7 @@ private:
> Vector<PlatformTimeRanges> activeRanges() const;
> 
> ExceptionOr<Ref<SourceBufferPrivate>> createSourceBufferPrivate(const ContentType&);
>- void scheduleEvent(const AtomicString& eventName);
>+ void scheduleEvent(const AtomString& eventName);
> 
> bool hasBufferedTime(const MediaTime&);
> bool hasCurrentTime();
>diff --git a/Source/WebCore/Modules/mediasource/SourceBuffer.cpp b/Source/WebCore/Modules/mediasource/SourceBuffer.cpp
>index aa8006e3c3872cc04c5615f29eefc1432ed73710..0bfbb0ac9cb4695c3231e05f744ff971b58532fa 100644
>--- a/Source/WebCore/Modules/mediasource/SourceBuffer.cpp
>+++ b/Source/WebCore/Modules/mediasource/SourceBuffer.cpp
>@@ -481,7 +481,7 @@ void SourceBuffer::seekToTime(const MediaTime& time)
> 
> for (auto& trackBufferPair : m_trackBufferMap) {
> TrackBuffer& trackBuffer = trackBufferPair.value;
>- const AtomicString& trackID = trackBufferPair.key;
>+ const AtomString& trackID = trackBufferPair.key;
> 
> trackBuffer.needsReenqueueing = true;
> reenqueueMediaForTime(trackBuffer, trackID, time);
>@@ -570,7 +570,7 @@ bool SourceBuffer::isRemoved() const
> return !m_source;
> }
> 
>-void SourceBuffer::scheduleEvent(const AtomicString& eventName)
>+void SourceBuffer::scheduleEvent(const AtomString& eventName)
> {
> auto event = Event::create(eventName, Event::CanBubble::No, Event::IsCancelable::No);
> event->setTarget(this);
>@@ -703,7 +703,7 @@ void SourceBuffer::sourceBufferPrivateAppendComplete(AppendResult result)
> MediaTime currentMediaTime = m_source->currentTime();
> for (auto& trackBufferPair : m_trackBufferMap) {
> TrackBuffer& trackBuffer = trackBufferPair.value;
>- const AtomicString& trackID = trackBufferPair.key;
>+ const AtomString& trackID = trackBufferPair.key;
> 
> if (trackBuffer.needsReenqueueing) {
> DEBUG_LOG(LOGIDENTIFIER, "reenqueuing at time ", currentMediaTime);
>@@ -1508,7 +1508,7 @@ void SourceBuffer::sourceBufferPrivateDidReceiveSample(MediaSample& sample)
> 
> // NOTE: this is out-of-order, but we need TrackBuffer to be able to cache the results of timestamp offset rounding
> // 1.5 Let track buffer equal the track buffer that the coded frame will be added to.
>- AtomicString trackID = sample.trackID();
>+ AtomString trackID = sample.trackID();
> auto it = m_trackBufferMap.find(trackID);
> if (it == m_trackBufferMap.end()) {
> // The client managed to append a sample with a trackID not present in the initialization
>@@ -1976,7 +1976,7 @@ void SourceBuffer::textTrackKindChanged(TextTrack& track)
> m_source->mediaElement()->textTrackKindChanged(track);
> }
> 
>-void SourceBuffer::sourceBufferPrivateReenqueSamples(const AtomicString& trackID)
>+void SourceBuffer::sourceBufferPrivateReenqueSamples(const AtomString& trackID)
> {
> if (isRemoved())
> return;
>@@ -1991,7 +1991,7 @@ void SourceBuffer::sourceBufferPrivateReenqueSamples(const AtomicString& trackID
> reenqueueMediaForTime(trackBuffer, trackID, m_source->currentTime());
> }
> 
>-void SourceBuffer::sourceBufferPrivateDidBecomeReadyForMoreSamples(const AtomicString& trackID)
>+void SourceBuffer::sourceBufferPrivateDidBecomeReadyForMoreSamples(const AtomString& trackID)
> {
> if (isRemoved())
> return;
>@@ -2006,7 +2006,7 @@ void SourceBuffer::sourceBufferPrivateDidBecomeReadyForMoreSamples(const AtomicS
> provideMediaData(trackBuffer, trackID);
> }
> 
>-void SourceBuffer::provideMediaData(TrackBuffer& trackBuffer, const AtomicString& trackID)
>+void SourceBuffer::provideMediaData(TrackBuffer& trackBuffer, const AtomString& trackID)
> {
> if (m_source->isSeeking())
> return;
>@@ -2058,7 +2058,7 @@ void SourceBuffer::provideMediaData(TrackBuffer& trackBuffer, const AtomicString
> trySignalAllSamplesInTrackEnqueued(trackID);
> }
> 
>-void SourceBuffer::trySignalAllSamplesInTrackEnqueued(const AtomicString& trackID)
>+void SourceBuffer::trySignalAllSamplesInTrackEnqueued(const AtomString& trackID)
> {
> if (m_source->isEnded() && m_trackBufferMap.get(trackID).decodeQueue.empty()) {
> DEBUG_LOG(LOGIDENTIFIER, "enqueued all samples from track ", trackID);
>@@ -2068,11 +2068,11 @@ void SourceBuffer::trySignalAllSamplesInTrackEnqueued(const AtomicString& trackI
> 
> void SourceBuffer::trySignalAllSamplesEnqueued()
> {
>- for (const AtomicString& trackID : m_trackBufferMap.keys())
>+ for (const AtomString& trackID : m_trackBufferMap.keys())
> trySignalAllSamplesInTrackEnqueued(trackID);
> }
> 
>-void SourceBuffer::reenqueueMediaForTime(TrackBuffer& trackBuffer, const AtomicString& trackID, const MediaTime& time)
>+void SourceBuffer::reenqueueMediaForTime(TrackBuffer& trackBuffer, const AtomString& trackID, const MediaTime& time)
> {
> m_private->flush(trackID);
> trackBuffer.decodeQueue.clear();
>@@ -2242,7 +2242,7 @@ void SourceBuffer::reportExtraMemoryAllocated()
> scriptExecutionContext()->vm().heap.deprecatedReportExtraMemory(extraMemoryCostDelta);
> }
> 
>-Vector<String> SourceBuffer::bufferedSamplesForTrackID(const AtomicString& trackID)
>+Vector<String> SourceBuffer::bufferedSamplesForTrackID(const AtomString& trackID)
> {
> auto it = m_trackBufferMap.find(trackID);
> if (it == m_trackBufferMap.end())
>@@ -2256,7 +2256,7 @@ Vector<String> SourceBuffer::bufferedSamplesForTrackID(const AtomicString& track
> return sampleDescriptions;
> }
> 
>-Vector<String> SourceBuffer::enqueuedSamplesForTrackID(const AtomicString& trackID)
>+Vector<String> SourceBuffer::enqueuedSamplesForTrackID(const AtomString& trackID)
> {
> return m_private->enqueuedSamplesForTrackID(trackID);
> }
>diff --git a/Source/WebCore/Modules/mediasource/SourceBuffer.h b/Source/WebCore/Modules/mediasource/SourceBuffer.h
>index 25050db4f3152327595d46834dc9e8c5261b8118..313d07ccf9255d9a761e32ea4a6380b60a393eed 100644
>--- a/Source/WebCore/Modules/mediasource/SourceBuffer.h
>+++ b/Source/WebCore/Modules/mediasource/SourceBuffer.h
>@@ -154,8 +154,8 @@ private:
> void sourceBufferPrivateDidReceiveSample(MediaSample&) final;
> bool sourceBufferPrivateHasAudio() const final;
> bool sourceBufferPrivateHasVideo() const final;
>- void sourceBufferPrivateReenqueSamples(const AtomicString& trackID) final;
>- void sourceBufferPrivateDidBecomeReadyForMoreSamples(const AtomicString& trackID) final;
>+ void sourceBufferPrivateReenqueSamples(const AtomString& trackID) final;
>+ void sourceBufferPrivateDidBecomeReadyForMoreSamples(const AtomString& trackID) final;
> MediaTime sourceBufferPrivateFastSeekTimeForMediaTime(const MediaTime&, const MediaTime& negativeThreshold, const MediaTime& positiveThreshold) final;
> void sourceBufferPrivateAppendComplete(AppendResult) final;
> void sourceBufferPrivateDidReceiveRenderingError(int errorCode) final;
>@@ -173,7 +173,7 @@ private:
> EventTargetInterface eventTargetInterface() const final { return SourceBufferEventTargetInterfaceType; }
> 
> bool isRemoved() const;
>- void scheduleEvent(const AtomicString& eventName);
>+ void scheduleEvent(const AtomString& eventName);
> 
> ExceptionOr<void> appendBufferInternal(const unsigned char*, unsigned);
> void appendBufferTimerFired();
>@@ -183,8 +183,8 @@ private:
> 
> bool validateInitializationSegment(const InitializationSegment&);
> 
>- void reenqueueMediaForTime(TrackBuffer&, const AtomicString& trackID, const MediaTime&);
>- void provideMediaData(TrackBuffer&, const AtomicString& trackID);
>+ void reenqueueMediaForTime(TrackBuffer&, const AtomString& trackID, const MediaTime&);
>+ void provideMediaData(TrackBuffer&, const AtomString& trackID);
> void didDropSample();
> void evictCodedFrames(size_t newDataSize);
> size_t maximumBufferSize() const;
>@@ -205,11 +205,11 @@ private:
> 
> void rangeRemoval(const MediaTime&, const MediaTime&);
> 
>- void trySignalAllSamplesInTrackEnqueued(const AtomicString&);
>+ void trySignalAllSamplesInTrackEnqueued(const AtomString&);
> 
> friend class Internals;
>- WEBCORE_EXPORT Vector<String> bufferedSamplesForTrackID(const AtomicString&);
>- WEBCORE_EXPORT Vector<String> enqueuedSamplesForTrackID(const AtomicString&);
>+ WEBCORE_EXPORT Vector<String> bufferedSamplesForTrackID(const AtomString&);
>+ WEBCORE_EXPORT Vector<String> enqueuedSamplesForTrackID(const AtomString&);
> 
> Ref<SourceBufferPrivate> m_private;
> MediaSource* m_source;
>@@ -223,9 +223,9 @@ private:
> RefPtr<AudioTrackList> m_audioTracks;
> RefPtr<TextTrackList> m_textTracks;
> 
>- Vector<AtomicString> m_videoCodecs;
>- Vector<AtomicString> m_audioCodecs;
>- Vector<AtomicString> m_textCodecs;
>+ Vector<AtomString> m_videoCodecs;
>+ Vector<AtomString> m_audioCodecs;
>+ Vector<AtomString> m_textCodecs;
> 
> MediaTime m_timestampOffset;
> MediaTime m_appendWindowStart;
>@@ -234,7 +234,7 @@ private:
> MediaTime m_groupStartTimestamp;
> MediaTime m_groupEndTimestamp;
> 
>- HashMap<AtomicString, TrackBuffer> m_trackBufferMap;
>+ HashMap<AtomString, TrackBuffer> m_trackBufferMap;
> RefPtr<TimeRanges> m_buffered;
> bool m_bufferedDirty { true };
> 
>diff --git a/Source/WebCore/Modules/mediasource/SourceBufferList.cpp b/Source/WebCore/Modules/mediasource/SourceBufferList.cpp
>index 2966c97f9219aa1bdd95ab3c718bb533d5fd1a68..6782246fd4c50b1315e1d9045ba4add9840f96a5 100644
>--- a/Source/WebCore/Modules/mediasource/SourceBufferList.cpp
>+++ b/Source/WebCore/Modules/mediasource/SourceBufferList.cpp
>@@ -93,7 +93,7 @@ void SourceBufferList::swap(Vector<RefPtr<SourceBuffer>>& other)
> scheduleEvent(eventNames().removesourcebufferEvent);
> }
> 
>-void SourceBufferList::scheduleEvent(const AtomicString& eventName)
>+void SourceBufferList::scheduleEvent(const AtomString& eventName)
> {
> auto event = Event::create(eventName, Event::CanBubble::No, Event::IsCancelable::No);
> event->setTarget(this);
>diff --git a/Source/WebCore/Modules/mediasource/SourceBufferList.h b/Source/WebCore/Modules/mediasource/SourceBufferList.h
>index 22f7b14359a9be0ee4293491e32fbbd3da2781cd..f83c1843221acb231f5426a7a32eb0b22914a36f 100644
>--- a/Source/WebCore/Modules/mediasource/SourceBufferList.h
>+++ b/Source/WebCore/Modules/mediasource/SourceBufferList.h
>@@ -73,7 +73,7 @@ public:
> private:
> explicit SourceBufferList(ScriptExecutionContext*);
> 
>- void scheduleEvent(const AtomicString&);
>+ void scheduleEvent(const AtomString&);
> 
> void refEventTarget() override { ref(); }
> void derefEventTarget() override { deref(); }
>diff --git a/Source/WebCore/Modules/mediastream/MediaDevices.cpp b/Source/WebCore/Modules/mediastream/MediaDevices.cpp
>index 52e5fd89f39601298d8da1dd8846969d173c2075..4bd7a9d7ccb993ca114b91aebe7aac89b5f30190 100644
>--- a/Source/WebCore/Modules/mediastream/MediaDevices.cpp
>+++ b/Source/WebCore/Modules/mediastream/MediaDevices.cpp
>@@ -177,7 +177,7 @@ bool MediaDevices::canSuspendForDocumentSuspension() const
> return true;
> }
> 
>-bool MediaDevices::addEventListener(const AtomicString& eventType, Ref<EventListener>&& listener, const AddEventListenerOptions& options)
>+bool MediaDevices::addEventListener(const AtomString& eventType, Ref<EventListener>&& listener, const AddEventListenerOptions& options)
> {
> if (!m_listeningForDeviceChanges && eventType == eventNames().devicechangeEvent) {
> auto* document = this->document();
>diff --git a/Source/WebCore/Modules/mediastream/MediaDevices.h b/Source/WebCore/Modules/mediastream/MediaDevices.h
>index a5279a4e78586723bc7d884333962f1424bedfb6..de3da08bd0eaa6ab6cfca253af9bc706b7a49c35 100644
>--- a/Source/WebCore/Modules/mediastream/MediaDevices.h
>+++ b/Source/WebCore/Modules/mediastream/MediaDevices.h
>@@ -89,7 +89,7 @@ private:
> explicit MediaDevices(Document&);
> 
> void scheduledEventTimerFired();
>- bool addEventListener(const AtomicString& eventType, Ref<EventListener>&&, const AddEventListenerOptions&) override;
>+ bool addEventListener(const AtomString& eventType, Ref<EventListener>&&, const AddEventListenerOptions&) override;
> 
> friend class JSMediaDevicesOwner;
> 
>diff --git a/Source/WebCore/Modules/mediastream/MediaStreamTrack.cpp b/Source/WebCore/Modules/mediastream/MediaStreamTrack.cpp
>index e7a090f07af5aed60c7a4e1e8bcca909692a3c9e..aa51679be9a199df38486887c23d1423f4ad7d7a 100644
>--- a/Source/WebCore/Modules/mediastream/MediaStreamTrack.cpp
>+++ b/Source/WebCore/Modules/mediastream/MediaStreamTrack.cpp
>@@ -81,10 +81,10 @@ MediaStreamTrack::~MediaStreamTrack()
> document->removeAudioProducer(*this);
> }
> 
>-const AtomicString& MediaStreamTrack::kind() const
>+const AtomString& MediaStreamTrack::kind() const
> {
>- static NeverDestroyed<AtomicString> audioKind("audio", AtomicString::ConstructFromLiteral);
>- static NeverDestroyed<AtomicString> videoKind("video", AtomicString::ConstructFromLiteral);
>+ static NeverDestroyed<AtomString> audioKind("audio", AtomString::ConstructFromLiteral);
>+ static NeverDestroyed<AtomString> videoKind("video", AtomString::ConstructFromLiteral);
> 
> if (m_private->type() == RealtimeMediaSource::Type::Audio)
> return audioKind;
>@@ -101,13 +101,13 @@ const String& MediaStreamTrack::label() const
> return m_private->label();
> }
> 
>-const AtomicString& MediaStreamTrack::contentHint() const
>+const AtomString& MediaStreamTrack::contentHint() const
> {
>- static NeverDestroyed<const AtomicString> speechHint("speech", AtomicString::ConstructFromLiteral);
>- static NeverDestroyed<const AtomicString> musicHint("music", AtomicString::ConstructFromLiteral);
>- static NeverDestroyed<const AtomicString> detailHint("detail", AtomicString::ConstructFromLiteral);
>- static NeverDestroyed<const AtomicString> textHint("text", AtomicString::ConstructFromLiteral);
>- static NeverDestroyed<const AtomicString> motionHint("motion", AtomicString::ConstructFromLiteral);
>+ static NeverDestroyed<const AtomString> speechHint("speech", AtomString::ConstructFromLiteral);
>+ static NeverDestroyed<const AtomString> musicHint("music", AtomString::ConstructFromLiteral);
>+ static NeverDestroyed<const AtomString> detailHint("detail", AtomString::ConstructFromLiteral);
>+ static NeverDestroyed<const AtomString> textHint("text", AtomString::ConstructFromLiteral);
>+ static NeverDestroyed<const AtomString> motionHint("motion", AtomString::ConstructFromLiteral);
> 
> switch (m_private->contentHint()) {
> case MediaStreamTrackPrivate::HintValue::Empty:
>@@ -459,7 +459,7 @@ void MediaStreamTrack::trackMutedChanged(MediaStreamTrackPrivate&)
> return;
> 
> m_eventTaskQueue.enqueueTask([this, muted = this->muted()] {
>- AtomicString eventType = muted ? eventNames().muteEvent : eventNames().unmuteEvent;
>+ AtomString eventType = muted ? eventNames().muteEvent : eventNames().unmuteEvent;
> dispatchEvent(Event::create(eventType, Event::CanBubble::No, Event::IsCancelable::No));
> });
> 
>diff --git a/Source/WebCore/Modules/mediastream/MediaStreamTrack.h b/Source/WebCore/Modules/mediastream/MediaStreamTrack.h
>index 02f1e794da58fa92b7793d4083974d22e48dbe16..9bf38b7643c20f228ba25449ab8d871d6ebff4d5 100644
>--- a/Source/WebCore/Modules/mediastream/MediaStreamTrack.h
>+++ b/Source/WebCore/Modules/mediastream/MediaStreamTrack.h
>@@ -70,11 +70,11 @@ public:
> 
> virtual bool isCanvas() const { return false; }
> 
>- const AtomicString& kind() const;
>+ const AtomString& kind() const;
> WEBCORE_EXPORT const String& id() const;
> const String& label() const;
> 
>- const AtomicString& contentHint() const;
>+ const AtomString& contentHint() const;
> void setContentHint(const String&);
> 
> bool enabled() const;
>diff --git a/Source/WebCore/Modules/mediastream/MediaStreamTrackEvent.cpp b/Source/WebCore/Modules/mediastream/MediaStreamTrackEvent.cpp
>index 67c45cdeb4c804c792cb9277ce18bb240fa0354b..3f44d9c28fa5997590830a1f4ea83c412040097a 100644
>--- a/Source/WebCore/Modules/mediastream/MediaStreamTrackEvent.cpp
>+++ b/Source/WebCore/Modules/mediastream/MediaStreamTrackEvent.cpp
>@@ -31,23 +31,23 @@
> 
> namespace WebCore {
> 
>-Ref<MediaStreamTrackEvent> MediaStreamTrackEvent::create(const AtomicString& type, CanBubble canBubble, IsCancelable cancelable, RefPtr<MediaStreamTrack>&& track)
>+Ref<MediaStreamTrackEvent> MediaStreamTrackEvent::create(const AtomString& type, CanBubble canBubble, IsCancelable cancelable, RefPtr<MediaStreamTrack>&& track)
> {
> return adoptRef(*new MediaStreamTrackEvent(type, canBubble, cancelable, WTFMove(track)));
> }
> 
>-Ref<MediaStreamTrackEvent> MediaStreamTrackEvent::create(const AtomicString& type, const Init& initializer, IsTrusted isTrusted)
>+Ref<MediaStreamTrackEvent> MediaStreamTrackEvent::create(const AtomString& type, const Init& initializer, IsTrusted isTrusted)
> {
> return adoptRef(*new MediaStreamTrackEvent(type, initializer, isTrusted));
> }
> 
>-MediaStreamTrackEvent::MediaStreamTrackEvent(const AtomicString& type, CanBubble canBubble, IsCancelable cancelable, RefPtr<MediaStreamTrack>&& track)
>+MediaStreamTrackEvent::MediaStreamTrackEvent(const AtomString& type, CanBubble canBubble, IsCancelable cancelable, RefPtr<MediaStreamTrack>&& track)
> : Event(type, canBubble, cancelable)
> , m_track(WTFMove(track))
> {
> }
> 
>-MediaStreamTrackEvent::MediaStreamTrackEvent(const AtomicString& type, const Init& initializer, IsTrusted isTrusted)
>+MediaStreamTrackEvent::MediaStreamTrackEvent(const AtomString& type, const Init& initializer, IsTrusted isTrusted)
> : Event(type, initializer, isTrusted)
> , m_track(initializer.track)
> {
>diff --git a/Source/WebCore/Modules/mediastream/MediaStreamTrackEvent.h b/Source/WebCore/Modules/mediastream/MediaStreamTrackEvent.h
>index d155daeb1e13a4de29fd907243618cc438eaeea7..7d89f9aedeceee87d79a0ea89fbae89854246885 100644
>--- a/Source/WebCore/Modules/mediastream/MediaStreamTrackEvent.h
>+++ b/Source/WebCore/Modules/mediastream/MediaStreamTrackEvent.h
>@@ -27,7 +27,7 @@
> #if ENABLE(MEDIA_STREAM)
> 
> #include "Event.h"
>-#include <wtf/text/AtomicString.h>
>+#include <wtf/text/AtomString.h>
> 
> namespace WebCore {
> 
>@@ -37,12 +37,12 @@ class MediaStreamTrackEvent : public Event {
> public:
> virtual ~MediaStreamTrackEvent();
> 
>- static Ref<MediaStreamTrackEvent> create(const AtomicString& type, CanBubble, IsCancelable, RefPtr<MediaStreamTrack>&&);
>+ static Ref<MediaStreamTrackEvent> create(const AtomString& type, CanBubble, IsCancelable, RefPtr<MediaStreamTrack>&&);
> 
> struct Init : EventInit {
> RefPtr<MediaStreamTrack> track;
> };
>- static Ref<MediaStreamTrackEvent> create(const AtomicString& type, const Init&, IsTrusted = IsTrusted::No);
>+ static Ref<MediaStreamTrackEvent> create(const AtomString& type, const Init&, IsTrusted = IsTrusted::No);
> 
> MediaStreamTrack* track() const;
> 
>@@ -50,8 +50,8 @@ public:
> EventInterface eventInterface() const override;
> 
> private:
>- MediaStreamTrackEvent(const AtomicString& type, CanBubble, IsCancelable, RefPtr<MediaStreamTrack>&&);
>- MediaStreamTrackEvent(const AtomicString& type, const Init&, IsTrusted);
>+ MediaStreamTrackEvent(const AtomString& type, CanBubble, IsCancelable, RefPtr<MediaStreamTrack>&&);
>+ MediaStreamTrackEvent(const AtomString& type, const Init&, IsTrusted);
> 
> RefPtr<MediaStreamTrack> m_track;
> };
>diff --git a/Source/WebCore/Modules/mediastream/OverconstrainedErrorEvent.h b/Source/WebCore/Modules/mediastream/OverconstrainedErrorEvent.h
>index c804e2a2e903ec5d507b41a131e5796870369052..8f71e036f587f394530322b6b39b5d960100e763 100644
>--- a/Source/WebCore/Modules/mediastream/OverconstrainedErrorEvent.h
>+++ b/Source/WebCore/Modules/mediastream/OverconstrainedErrorEvent.h
>@@ -32,7 +32,7 @@
> 
> #include "Event.h"
> #include "OverconstrainedError.h"
>-#include <wtf/text/AtomicString.h>
>+#include <wtf/text/AtomString.h>
> 
> namespace WebCore {
> 
>@@ -40,7 +40,7 @@ class OverconstrainedErrorEvent : public Event {
> public:
> virtual ~OverconstrainedErrorEvent() = default;
> 
>- static Ref<OverconstrainedErrorEvent> create(const AtomicString& type, CanBubble canBubble, IsCancelable cancelable, OverconstrainedError* error)
>+ static Ref<OverconstrainedErrorEvent> create(const AtomString& type, CanBubble canBubble, IsCancelable cancelable, OverconstrainedError* error)
> {
> return adoptRef(*new OverconstrainedErrorEvent(type, canBubble, cancelable, error));
> }
>@@ -49,7 +49,7 @@ public:
> RefPtr<OverconstrainedError> error;
> };
> 
>- static Ref<OverconstrainedErrorEvent> create(const AtomicString& type, const Init& initializer, IsTrusted isTrusted = IsTrusted::No)
>+ static Ref<OverconstrainedErrorEvent> create(const AtomString& type, const Init& initializer, IsTrusted isTrusted = IsTrusted::No)
> {
> return adoptRef(*new OverconstrainedErrorEvent(type, initializer, isTrusted));
> }
>@@ -58,12 +58,12 @@ public:
> EventInterface eventInterface() const override { return OverconstrainedErrorEventInterfaceType; }
> 
> private:
>- explicit OverconstrainedErrorEvent(const AtomicString& type, CanBubble canBubble, IsCancelable cancelable, OverconstrainedError* error)
>+ explicit OverconstrainedErrorEvent(const AtomString& type, CanBubble canBubble, IsCancelable cancelable, OverconstrainedError* error)
> : Event(type, canBubble, cancelable)
> , m_error(error)
> {
> }
>- OverconstrainedErrorEvent(const AtomicString& type, const Init& initializer, IsTrusted isTrusted)
>+ OverconstrainedErrorEvent(const AtomString& type, const Init& initializer, IsTrusted isTrusted)
> : Event(type, initializer, isTrusted)
> , m_error(initializer.error)
> {
>diff --git a/Source/WebCore/Modules/mediastream/RTCDTMFToneChangeEvent.cpp b/Source/WebCore/Modules/mediastream/RTCDTMFToneChangeEvent.cpp
>index b067d126157c9eddd3e57330f51271e89f191bbd..4035dbf723aca63e448b0866716251219a8cd918 100644
>--- a/Source/WebCore/Modules/mediastream/RTCDTMFToneChangeEvent.cpp
>+++ b/Source/WebCore/Modules/mediastream/RTCDTMFToneChangeEvent.cpp
>@@ -37,7 +37,7 @@ Ref<RTCDTMFToneChangeEvent> RTCDTMFToneChangeEvent::create(const String& tone)
> return adoptRef(*new RTCDTMFToneChangeEvent(tone));
> }
> 
>-Ref<RTCDTMFToneChangeEvent> RTCDTMFToneChangeEvent::create(const AtomicString& type, const Init& initializer, IsTrusted isTrusted)
>+Ref<RTCDTMFToneChangeEvent> RTCDTMFToneChangeEvent::create(const AtomString& type, const Init& initializer, IsTrusted isTrusted)
> {
> return adoptRef(*new RTCDTMFToneChangeEvent(type, initializer, isTrusted));
> }
>@@ -48,7 +48,7 @@ RTCDTMFToneChangeEvent::RTCDTMFToneChangeEvent(const String& tone)
> {
> }
> 
>-RTCDTMFToneChangeEvent::RTCDTMFToneChangeEvent(const AtomicString& type, const Init& initializer, IsTrusted isTrusted)
>+RTCDTMFToneChangeEvent::RTCDTMFToneChangeEvent(const AtomString& type, const Init& initializer, IsTrusted isTrusted)
> : Event(type, initializer, isTrusted)
> , m_tone(initializer.tone)
> {
>diff --git a/Source/WebCore/Modules/mediastream/RTCDTMFToneChangeEvent.h b/Source/WebCore/Modules/mediastream/RTCDTMFToneChangeEvent.h
>index c8d6b281142781d47be15cc90c57767188d7994d..b037d63a54b014e1d846a9952df9232275e2577f 100644
>--- a/Source/WebCore/Modules/mediastream/RTCDTMFToneChangeEvent.h
>+++ b/Source/WebCore/Modules/mediastream/RTCDTMFToneChangeEvent.h
>@@ -28,7 +28,7 @@
> #if ENABLE(WEB_RTC_DTMF)
> 
> #include "Event.h"
>-#include <wtf/text/AtomicString.h>
>+#include <wtf/text/AtomString.h>
> 
> namespace WebCore {
> 
>@@ -42,7 +42,7 @@ public:
> String tone;
> };
> 
>- static Ref<RTCDTMFToneChangeEvent> create(const AtomicString& type, const Init&, IsTrusted = IsTrusted::No);
>+ static Ref<RTCDTMFToneChangeEvent> create(const AtomString& type, const Init&, IsTrusted = IsTrusted::No);
> 
> const String& tone() const;
> 
>@@ -50,7 +50,7 @@ public:
> 
> private:
> explicit RTCDTMFToneChangeEvent(const String& tone);
>- RTCDTMFToneChangeEvent(const AtomicString& type, const Init&, IsTrusted);
>+ RTCDTMFToneChangeEvent(const AtomString& type, const Init&, IsTrusted);
> 
> String m_tone;
> };
>diff --git a/Source/WebCore/Modules/mediastream/RTCDataChannel.cpp b/Source/WebCore/Modules/mediastream/RTCDataChannel.cpp
>index b62c44fd876ed263a39159db232fbfe3dca3abad..754e468c92156e973bcdfb461ac53f6dd5555d67 100644
>--- a/Source/WebCore/Modules/mediastream/RTCDataChannel.cpp
>+++ b/Source/WebCore/Modules/mediastream/RTCDataChannel.cpp
>@@ -44,15 +44,15 @@ namespace WebCore {
> 
> WTF_MAKE_ISO_ALLOCATED_IMPL(RTCDataChannel);
> 
>-static const AtomicString& blobKeyword()
>+static const AtomString& blobKeyword()
> {
>- static NeverDestroyed<AtomicString> blob("blob", AtomicString::ConstructFromLiteral);
>+ static NeverDestroyed<AtomString> blob("blob", AtomString::ConstructFromLiteral);
> return blob;
> }
> 
>-static const AtomicString& arraybufferKeyword()
>+static const AtomString& arraybufferKeyword()
> {
>- static NeverDestroyed<AtomicString> arraybuffer("arraybuffer", AtomicString::ConstructFromLiteral);
>+ static NeverDestroyed<AtomString> arraybuffer("arraybuffer", AtomString::ConstructFromLiteral);
> return arraybuffer;
> }
> 
>@@ -83,7 +83,7 @@ size_t RTCDataChannel::bufferedAmount() const
> return m_handler->bufferedAmount();
> }
> 
>-const AtomicString& RTCDataChannel::binaryType() const
>+const AtomString& RTCDataChannel::binaryType() const
> {
> switch (m_binaryType) {
> case BinaryType::Blob:
>@@ -96,7 +96,7 @@ const AtomicString& RTCDataChannel::binaryType() const
> return emptyAtom();
> }
> 
>-ExceptionOr<void> RTCDataChannel::setBinaryType(const AtomicString& binaryType)
>+ExceptionOr<void> RTCDataChannel::setBinaryType(const AtomString& binaryType)
> {
> if (binaryType == blobKeyword()) {
> m_binaryType = BinaryType::Blob;
>diff --git a/Source/WebCore/Modules/mediastream/RTCDataChannel.h b/Source/WebCore/Modules/mediastream/RTCDataChannel.h
>index 0d6436d49dfad82a11a9ab1ed392f4376575d81d..bdcf9e186c5072f605526dfb1fb48c36b5ac719e 100644
>--- a/Source/WebCore/Modules/mediastream/RTCDataChannel.h
>+++ b/Source/WebCore/Modules/mediastream/RTCDataChannel.h
>@@ -64,8 +64,8 @@ public:
> size_t bufferedAmountLowThreshold() const { return m_bufferedAmountLowThreshold; }
> void setBufferedAmountLowThreshold(size_t value) { m_bufferedAmountLowThreshold = value; }
> 
>- const AtomicString& binaryType() const;
>- ExceptionOr<void> setBinaryType(const AtomicString&);
>+ const AtomString& binaryType() const;
>+ ExceptionOr<void> setBinaryType(const AtomString&);
> 
> ExceptionOr<void> send(const String&);
> ExceptionOr<void> send(JSC::ArrayBuffer&);
>diff --git a/Source/WebCore/Modules/mediastream/RTCDataChannelEvent.cpp b/Source/WebCore/Modules/mediastream/RTCDataChannelEvent.cpp
>index d72fb7a9160754a4d46a9639e67e28bbb6073aa1..9180581b6a7f3cfae0bc11add60eb7e6cb1c4c97 100644
>--- a/Source/WebCore/Modules/mediastream/RTCDataChannelEvent.cpp
>+++ b/Source/WebCore/Modules/mediastream/RTCDataChannelEvent.cpp
>@@ -32,23 +32,23 @@
> 
> namespace WebCore {
> 
>-Ref<RTCDataChannelEvent> RTCDataChannelEvent::create(const AtomicString& type, CanBubble canBubble, IsCancelable cancelable, Ref<RTCDataChannel>&& channel)
>+Ref<RTCDataChannelEvent> RTCDataChannelEvent::create(const AtomString& type, CanBubble canBubble, IsCancelable cancelable, Ref<RTCDataChannel>&& channel)
> {
> return adoptRef(*new RTCDataChannelEvent(type, canBubble, cancelable, WTFMove(channel)));
> }
> 
>-Ref<RTCDataChannelEvent> RTCDataChannelEvent::create(const AtomicString& type, Init&& initializer, IsTrusted isTrusted)
>+Ref<RTCDataChannelEvent> RTCDataChannelEvent::create(const AtomString& type, Init&& initializer, IsTrusted isTrusted)
> {
> return adoptRef(*new RTCDataChannelEvent(type, WTFMove(initializer), isTrusted));
> }
> 
>-RTCDataChannelEvent::RTCDataChannelEvent(const AtomicString& type, CanBubble canBubble, IsCancelable cancelable, Ref<RTCDataChannel>&& channel)
>+RTCDataChannelEvent::RTCDataChannelEvent(const AtomString& type, CanBubble canBubble, IsCancelable cancelable, Ref<RTCDataChannel>&& channel)
> : Event(type, canBubble, cancelable)
> , m_channel(WTFMove(channel))
> {
> }
> 
>-RTCDataChannelEvent::RTCDataChannelEvent(const AtomicString& type, Init&& initializer, IsTrusted isTrusted)
>+RTCDataChannelEvent::RTCDataChannelEvent(const AtomString& type, Init&& initializer, IsTrusted isTrusted)
> : Event(type, initializer, isTrusted)
> , m_channel(initializer.channel.releaseNonNull())
> {
>diff --git a/Source/WebCore/Modules/mediastream/RTCDataChannelEvent.h b/Source/WebCore/Modules/mediastream/RTCDataChannelEvent.h
>index 49b24c7ecc6d8af42da087a39a5051e5e1a4282e..e71674716308a9495af5b1f048879fde1b2839a0 100644
>--- a/Source/WebCore/Modules/mediastream/RTCDataChannelEvent.h
>+++ b/Source/WebCore/Modules/mediastream/RTCDataChannelEvent.h
>@@ -29,7 +29,7 @@
> 
> #include "Event.h"
> #include "RTCDataChannel.h"
>-#include <wtf/text/AtomicString.h>
>+#include <wtf/text/AtomString.h>
> 
> namespace WebCore {
> 
>@@ -39,16 +39,16 @@ public:
> RefPtr<RTCDataChannel> channel;
> };
> 
>- static Ref<RTCDataChannelEvent> create(const AtomicString& type, CanBubble, IsCancelable, Ref<RTCDataChannel>&&);
>- static Ref<RTCDataChannelEvent> create(const AtomicString& type, Init&&, IsTrusted = IsTrusted::No);
>+ static Ref<RTCDataChannelEvent> create(const AtomString& type, CanBubble, IsCancelable, Ref<RTCDataChannel>&&);
>+ static Ref<RTCDataChannelEvent> create(const AtomString& type, Init&&, IsTrusted = IsTrusted::No);
> 
> RTCDataChannel& channel();
> 
> virtual EventInterface eventInterface() const;
> 
> private:
>- RTCDataChannelEvent(const AtomicString& type, CanBubble, IsCancelable, Ref<RTCDataChannel>&&);
>- RTCDataChannelEvent(const AtomicString& type, Init&&, IsTrusted);
>+ RTCDataChannelEvent(const AtomString& type, CanBubble, IsCancelable, Ref<RTCDataChannel>&&);
>+ RTCDataChannelEvent(const AtomString& type, Init&&, IsTrusted);
> 
> Ref<RTCDataChannel> m_channel;
> };
>diff --git a/Source/WebCore/Modules/mediastream/RTCPeerConnectionIceEvent.cpp b/Source/WebCore/Modules/mediastream/RTCPeerConnectionIceEvent.cpp
>index 536ab5124bf5a8872804b865ac08ba6c3ec90fde..fa676e2856d4457a425fe50851d6b10c19c9dfb4 100644
>--- a/Source/WebCore/Modules/mediastream/RTCPeerConnectionIceEvent.cpp
>+++ b/Source/WebCore/Modules/mediastream/RTCPeerConnectionIceEvent.cpp
>@@ -37,13 +37,13 @@ Ref<RTCPeerConnectionIceEvent> RTCPeerConnectionIceEvent::create(CanBubble canBu
> return adoptRef(*new RTCPeerConnectionIceEvent(eventNames().icecandidateEvent, canBubble, cancelable, WTFMove(candidate), WTFMove(serverURL)));
> }
> 
>-Ref<RTCPeerConnectionIceEvent> RTCPeerConnectionIceEvent::create(const AtomicString& type, Init&& init)
>+Ref<RTCPeerConnectionIceEvent> RTCPeerConnectionIceEvent::create(const AtomString& type, Init&& init)
> {
> return adoptRef(*new RTCPeerConnectionIceEvent(type, init.bubbles ? CanBubble::Yes : CanBubble::No,
> init.cancelable ? IsCancelable::Yes : IsCancelable::No, WTFMove(init.candidate), WTFMove(init.url)));
> }
> 
>-RTCPeerConnectionIceEvent::RTCPeerConnectionIceEvent(const AtomicString& type, CanBubble canBubble, IsCancelable cancelable, RefPtr<RTCIceCandidate>&& candidate, String&& serverURL)
>+RTCPeerConnectionIceEvent::RTCPeerConnectionIceEvent(const AtomString& type, CanBubble canBubble, IsCancelable cancelable, RefPtr<RTCIceCandidate>&& candidate, String&& serverURL)
> : Event(type, canBubble, cancelable)
> , m_candidate(WTFMove(candidate))
> , m_url(WTFMove(serverURL))
>diff --git a/Source/WebCore/Modules/mediastream/RTCPeerConnectionIceEvent.h b/Source/WebCore/Modules/mediastream/RTCPeerConnectionIceEvent.h
>index 5f69d8ea7f7489fffc9769303a50ce0affa00596..992e681a93ced633b25d44acea65c4afaf0cb4ae 100644
>--- a/Source/WebCore/Modules/mediastream/RTCPeerConnectionIceEvent.h
>+++ b/Source/WebCore/Modules/mediastream/RTCPeerConnectionIceEvent.h
>@@ -27,7 +27,7 @@
> #if ENABLE(WEB_RTC)
> 
> #include "Event.h"
>-#include <wtf/text/AtomicString.h>
>+#include <wtf/text/AtomString.h>
> 
> namespace WebCore {
> class RTCIceCandidate;
>@@ -41,7 +41,7 @@ public:
> String url;
> };
> 
>- static Ref<RTCPeerConnectionIceEvent> create(const AtomicString& type, Init&&);
>+ static Ref<RTCPeerConnectionIceEvent> create(const AtomString& type, Init&&);
> static Ref<RTCPeerConnectionIceEvent> create(CanBubble, IsCancelable, RefPtr<RTCIceCandidate>&&, String&& serverURL);
> 
> RTCIceCandidate* candidate() const;
>@@ -50,7 +50,7 @@ public:
> virtual EventInterface eventInterface() const;
> 
> private:
>- RTCPeerConnectionIceEvent(const AtomicString& type, CanBubble, IsCancelable, RefPtr<RTCIceCandidate>&&, String&& serverURL);
>+ RTCPeerConnectionIceEvent(const AtomString& type, CanBubble, IsCancelable, RefPtr<RTCIceCandidate>&&, String&& serverURL);
> 
> RefPtr<RTCIceCandidate> m_candidate;
> String m_url;
>diff --git a/Source/WebCore/Modules/mediastream/RTCTrackEvent.cpp b/Source/WebCore/Modules/mediastream/RTCTrackEvent.cpp
>index d4f3355a72b615956ba74cc9ac7096850ac83ace..67c926b14ba81d9ed73f4a647149191d99068760 100644
>--- a/Source/WebCore/Modules/mediastream/RTCTrackEvent.cpp
>+++ b/Source/WebCore/Modules/mediastream/RTCTrackEvent.cpp
>@@ -39,17 +39,17 @@
> 
> namespace WebCore {
> 
>-Ref<RTCTrackEvent> RTCTrackEvent::create(const AtomicString& type, CanBubble canBubble, IsCancelable cancelable, RefPtr<RTCRtpReceiver>&& receiver, RefPtr<MediaStreamTrack>&& track, Vector<RefPtr<MediaStream>>&& streams, RefPtr<RTCRtpTransceiver>&& transceiver)
>+Ref<RTCTrackEvent> RTCTrackEvent::create(const AtomString& type, CanBubble canBubble, IsCancelable cancelable, RefPtr<RTCRtpReceiver>&& receiver, RefPtr<MediaStreamTrack>&& track, Vector<RefPtr<MediaStream>>&& streams, RefPtr<RTCRtpTransceiver>&& transceiver)
> {
> return adoptRef(*new RTCTrackEvent(type, canBubble, cancelable, WTFMove(receiver), WTFMove(track), WTFMove(streams), WTFMove(transceiver)));
> }
> 
>-Ref<RTCTrackEvent> RTCTrackEvent::create(const AtomicString& type, const Init& initializer, IsTrusted isTrusted)
>+Ref<RTCTrackEvent> RTCTrackEvent::create(const AtomString& type, const Init& initializer, IsTrusted isTrusted)
> {
> return adoptRef(*new RTCTrackEvent(type, initializer, isTrusted));
> }
> 
>-RTCTrackEvent::RTCTrackEvent(const AtomicString& type, CanBubble canBubble, IsCancelable cancelable, RefPtr<RTCRtpReceiver>&& receiver, RefPtr<MediaStreamTrack>&& track, Vector<RefPtr<MediaStream>>&& streams, RefPtr<RTCRtpTransceiver>&& transceiver)
>+RTCTrackEvent::RTCTrackEvent(const AtomString& type, CanBubble canBubble, IsCancelable cancelable, RefPtr<RTCRtpReceiver>&& receiver, RefPtr<MediaStreamTrack>&& track, Vector<RefPtr<MediaStream>>&& streams, RefPtr<RTCRtpTransceiver>&& transceiver)
> : Event(type, canBubble, cancelable)
> , m_receiver(WTFMove(receiver))
> , m_track(WTFMove(track))
>@@ -58,7 +58,7 @@ RTCTrackEvent::RTCTrackEvent(const AtomicString& type, CanBubble canBubble, IsCa
> {
> }
> 
>-RTCTrackEvent::RTCTrackEvent(const AtomicString& type, const Init& initializer, IsTrusted isTrusted)
>+RTCTrackEvent::RTCTrackEvent(const AtomString& type, const Init& initializer, IsTrusted isTrusted)
> : Event(type, initializer, isTrusted)
> , m_receiver(initializer.receiver)
> , m_track(initializer.track)
>diff --git a/Source/WebCore/Modules/mediastream/RTCTrackEvent.h b/Source/WebCore/Modules/mediastream/RTCTrackEvent.h
>index 13251cde8f82bc1279d65a512a0cf16bc3cb2692..3739e49d24ed62d97f7bff999b1177e781b6a993 100644
>--- a/Source/WebCore/Modules/mediastream/RTCTrackEvent.h
>+++ b/Source/WebCore/Modules/mediastream/RTCTrackEvent.h
>@@ -33,7 +33,7 @@
> #if ENABLE(WEB_RTC)
> 
> #include "Event.h"
>-#include <wtf/text/AtomicString.h>
>+#include <wtf/text/AtomString.h>
> 
> namespace WebCore {
> 
>@@ -46,7 +46,7 @@ typedef Vector<RefPtr<MediaStream>> MediaStreamArray;
> 
> class RTCTrackEvent : public Event {
> public:
>- static Ref<RTCTrackEvent> create(const AtomicString& type, CanBubble, IsCancelable, RefPtr<RTCRtpReceiver>&&, RefPtr<MediaStreamTrack>&&, MediaStreamArray&&, RefPtr<RTCRtpTransceiver>&&);
>+ static Ref<RTCTrackEvent> create(const AtomString& type, CanBubble, IsCancelable, RefPtr<RTCRtpReceiver>&&, RefPtr<MediaStreamTrack>&&, MediaStreamArray&&, RefPtr<RTCRtpTransceiver>&&);
> 
> struct Init : EventInit {
> RefPtr<RTCRtpReceiver> receiver;
>@@ -54,7 +54,7 @@ public:
> MediaStreamArray streams;
> RefPtr<RTCRtpTransceiver> transceiver;
> };
>- static Ref<RTCTrackEvent> create(const AtomicString& type, const Init&, IsTrusted = IsTrusted::No);
>+ static Ref<RTCTrackEvent> create(const AtomString& type, const Init&, IsTrusted = IsTrusted::No);
> 
> RTCRtpReceiver* receiver() const { return m_receiver.get(); }
> MediaStreamTrack* track() const { return m_track.get(); }
>@@ -64,8 +64,8 @@ public:
> virtual EventInterface eventInterface() const { return RTCTrackEventInterfaceType; }
> 
> private:
>- RTCTrackEvent(const AtomicString& type, CanBubble, IsCancelable, RefPtr<RTCRtpReceiver>&&, RefPtr<MediaStreamTrack>&&, MediaStreamArray&&, RefPtr<RTCRtpTransceiver>&&);
>- RTCTrackEvent(const AtomicString& type, const Init&, IsTrusted);
>+ RTCTrackEvent(const AtomString& type, CanBubble, IsCancelable, RefPtr<RTCRtpReceiver>&&, RefPtr<MediaStreamTrack>&&, MediaStreamArray&&, RefPtr<RTCRtpTransceiver>&&);
>+ RTCTrackEvent(const AtomString& type, const Init&, IsTrusted);
> 
> RefPtr<RTCRtpReceiver> m_receiver;
> RefPtr<MediaStreamTrack> m_track;
>diff --git a/Source/WebCore/Modules/paymentrequest/MerchantValidationEvent.cpp b/Source/WebCore/Modules/paymentrequest/MerchantValidationEvent.cpp
>index 32a3b6f1ad64b1001580add3a995c4a403400661..90215aa67c2c61a1cad8ee9a34d34f686d0f4614 100644
>--- a/Source/WebCore/Modules/paymentrequest/MerchantValidationEvent.cpp
>+++ b/Source/WebCore/Modules/paymentrequest/MerchantValidationEvent.cpp
>@@ -33,12 +33,12 @@
> 
> namespace WebCore {
> 
>-Ref<MerchantValidationEvent> MerchantValidationEvent::create(const AtomicString& type, const String& methodName, URL&& validationURL)
>+Ref<MerchantValidationEvent> MerchantValidationEvent::create(const AtomString& type, const String& methodName, URL&& validationURL)
> {
> return adoptRef(*new MerchantValidationEvent(type, methodName, WTFMove(validationURL)));
> }
> 
>-ExceptionOr<Ref<MerchantValidationEvent>> MerchantValidationEvent::create(Document& document, const AtomicString& type, Init&& eventInit)
>+ExceptionOr<Ref<MerchantValidationEvent>> MerchantValidationEvent::create(Document& document, const AtomString& type, Init&& eventInit)
> {
> URL validationURL { document.url(), eventInit.validationURL };
> if (!validationURL.isValid())
>@@ -54,7 +54,7 @@ ExceptionOr<Ref<MerchantValidationEvent>> MerchantValidationEvent::create(Docume
> return adoptRef(*new MerchantValidationEvent(type, WTFMove(methodName), WTFMove(validationURL), WTFMove(eventInit)));
> }
> 
>-MerchantValidationEvent::MerchantValidationEvent(const AtomicString& type, const String& methodName, URL&& validationURL)
>+MerchantValidationEvent::MerchantValidationEvent(const AtomString& type, const String& methodName, URL&& validationURL)
> : Event { type, Event::CanBubble::No, Event::IsCancelable::No }
> , m_methodName { methodName }
> , m_validationURL { WTFMove(validationURL) }
>@@ -63,7 +63,7 @@ MerchantValidationEvent::MerchantValidationEvent(const AtomicString& type, const
> ASSERT(m_validationURL.isValid());
> }
> 
>-MerchantValidationEvent::MerchantValidationEvent(const AtomicString& type, String&& methodName, URL&& validationURL, Init&& eventInit)
>+MerchantValidationEvent::MerchantValidationEvent(const AtomString& type, String&& methodName, URL&& validationURL, Init&& eventInit)
> : Event { type, WTFMove(eventInit), IsTrusted::No }
> , m_methodName { WTFMove(methodName) }
> , m_validationURL { WTFMove(validationURL) }
>diff --git a/Source/WebCore/Modules/paymentrequest/MerchantValidationEvent.h b/Source/WebCore/Modules/paymentrequest/MerchantValidationEvent.h
>index 29fffbf20b285f8f5e0e619d0871dd6495265d41..e2b1bd7a7cc04481825a31f1cbf2aed15ffcfbda 100644
>--- a/Source/WebCore/Modules/paymentrequest/MerchantValidationEvent.h
>+++ b/Source/WebCore/Modules/paymentrequest/MerchantValidationEvent.h
>@@ -42,16 +42,16 @@ public:
> String validationURL;
> };
> 
>- static Ref<MerchantValidationEvent> create(const AtomicString& type, const String& methodName, URL&& validationURL);
>- static ExceptionOr<Ref<MerchantValidationEvent>> create(Document&, const AtomicString& type, Init&&);
>+ static Ref<MerchantValidationEvent> create(const AtomString& type, const String& methodName, URL&& validationURL);
>+ static ExceptionOr<Ref<MerchantValidationEvent>> create(Document&, const AtomString& type, Init&&);
> 
> const String& methodName() const { return m_methodName; }
> const String& validationURL() const { return m_validationURL.string(); }
> ExceptionOr<void> complete(Ref<DOMPromise>&&);
> 
> private:
>- MerchantValidationEvent(const AtomicString& type, const String& methodName, URL&& validationURL);
>- MerchantValidationEvent(const AtomicString& type, String&& methodName, URL&& validationURL, Init&&);
>+ MerchantValidationEvent(const AtomString& type, const String& methodName, URL&& validationURL);
>+ MerchantValidationEvent(const AtomString& type, String&& methodName, URL&& validationURL, Init&&);
> 
> // Event
> EventInterface eventInterface() const final;
>diff --git a/Source/WebCore/Modules/paymentrequest/PaymentMethodChangeEvent.cpp b/Source/WebCore/Modules/paymentrequest/PaymentMethodChangeEvent.cpp
>index 62d405cfadf20264e634f66abb550d64cde3b8f4..8736416628158b22b09478d8eb7041c6ca5f80d8 100644
>--- a/Source/WebCore/Modules/paymentrequest/PaymentMethodChangeEvent.cpp
>+++ b/Source/WebCore/Modules/paymentrequest/PaymentMethodChangeEvent.cpp
>@@ -35,14 +35,14 @@ EventInterface PaymentMethodChangeEvent::eventInterface() const
> return PaymentMethodChangeEventInterfaceType;
> }
> 
>-PaymentMethodChangeEvent::PaymentMethodChangeEvent(const AtomicString& type, Init&& eventInit)
>+PaymentMethodChangeEvent::PaymentMethodChangeEvent(const AtomString& type, Init&& eventInit)
> : PaymentRequestUpdateEvent { type, eventInit }
> , m_methodName { WTFMove(eventInit.methodName) }
> , m_methodDetails { JSValueInWrappedObject { eventInit.methodDetails.get() } }
> {
> }
> 
>-PaymentMethodChangeEvent::PaymentMethodChangeEvent(const AtomicString& type, const String& methodName, MethodDetailsFunction&& methodDetailsFunction)
>+PaymentMethodChangeEvent::PaymentMethodChangeEvent(const AtomString& type, const String& methodName, MethodDetailsFunction&& methodDetailsFunction)
> : PaymentRequestUpdateEvent { type }
> , m_methodName { methodName }
> , m_methodDetails { WTFMove(methodDetailsFunction) }
>diff --git a/Source/WebCore/Modules/paymentrequest/PaymentMethodChangeEvent.h b/Source/WebCore/Modules/paymentrequest/PaymentMethodChangeEvent.h
>index 92f5a783b769d921478da23e93a73d15fcc5be6b..82e331704206f7e3d38bc2983a0088c21eed6481 100644
>--- a/Source/WebCore/Modules/paymentrequest/PaymentMethodChangeEvent.h
>+++ b/Source/WebCore/Modules/paymentrequest/PaymentMethodChangeEvent.h
>@@ -62,8 +62,8 @@ public:
> };
> 
> private:
>- PaymentMethodChangeEvent(const AtomicString& type, Init&&);
>- PaymentMethodChangeEvent(const AtomicString& type, const String& methodName, MethodDetailsFunction&&);
>+ PaymentMethodChangeEvent(const AtomString& type, Init&&);
>+ PaymentMethodChangeEvent(const AtomString& type, const String& methodName, MethodDetailsFunction&&);
> 
> String m_methodName;
> MethodDetailsType m_methodDetails;
>diff --git a/Source/WebCore/Modules/paymentrequest/PaymentRequestUpdateEvent.cpp b/Source/WebCore/Modules/paymentrequest/PaymentRequestUpdateEvent.cpp
>index a0d7d783f8b8ae255536e222326d764a44e7199a..871559c9d11575c177e6649b405b92f39ae13270 100644
>--- a/Source/WebCore/Modules/paymentrequest/PaymentRequestUpdateEvent.cpp
>+++ b/Source/WebCore/Modules/paymentrequest/PaymentRequestUpdateEvent.cpp
>@@ -33,13 +33,13 @@
> 
> namespace WebCore {
> 
>-PaymentRequestUpdateEvent::PaymentRequestUpdateEvent(const AtomicString& type, const PaymentRequestUpdateEventInit& eventInit)
>+PaymentRequestUpdateEvent::PaymentRequestUpdateEvent(const AtomString& type, const PaymentRequestUpdateEventInit& eventInit)
> : Event { type, eventInit, IsTrusted::No }
> {
> ASSERT(!isTrusted());
> }
> 
>-PaymentRequestUpdateEvent::PaymentRequestUpdateEvent(const AtomicString& type)
>+PaymentRequestUpdateEvent::PaymentRequestUpdateEvent(const AtomString& type)
> : Event { type, CanBubble::No, IsCancelable::No }
> {
> ASSERT(isTrusted());
>diff --git a/Source/WebCore/Modules/paymentrequest/PaymentRequestUpdateEvent.h b/Source/WebCore/Modules/paymentrequest/PaymentRequestUpdateEvent.h
>index 1e7909bd648628557c080cce082d39424999b13f..4a0acd3c078b2b5b76856ad600e0095c2cf4569b 100644
>--- a/Source/WebCore/Modules/paymentrequest/PaymentRequestUpdateEvent.h
>+++ b/Source/WebCore/Modules/paymentrequest/PaymentRequestUpdateEvent.h
>@@ -45,8 +45,8 @@ public:
> ExceptionOr<void> updateWith(Ref<DOMPromise>&&);
> 
> protected:
>- explicit PaymentRequestUpdateEvent(const AtomicString& type);
>- PaymentRequestUpdateEvent(const AtomicString& type, const PaymentRequestUpdateEventInit&);
>+ explicit PaymentRequestUpdateEvent(const AtomString& type);
>+ PaymentRequestUpdateEvent(const AtomString& type, const PaymentRequestUpdateEventInit&);
> 
> // Event
> EventInterface eventInterface() const override;
>diff --git a/Source/WebCore/Modules/plugins/YouTubePluginReplacement.cpp b/Source/WebCore/Modules/plugins/YouTubePluginReplacement.cpp
>index 5187adfbed0912fcc8a7cfd064b8ec12ee9b9925..ba95bf5181a20ac019fb3f0fb09ff6578aa48805 100644
>--- a/Source/WebCore/Modules/plugins/YouTubePluginReplacement.cpp
>+++ b/Source/WebCore/Modules/plugins/YouTubePluginReplacement.cpp
>@@ -85,19 +85,19 @@ bool YouTubePluginReplacement::installReplacement(ShadowRoot& root)
> 
> auto iframeElement = HTMLIFrameElement::create(HTMLNames::iframeTag, m_parentElement->document());
> if (m_attributes.contains("width"))
>- iframeElement->setAttributeWithoutSynchronization(HTMLNames::widthAttr, AtomicString("100%", AtomicString::ConstructFromLiteral));
>+ iframeElement->setAttributeWithoutSynchronization(HTMLNames::widthAttr, AtomString("100%", AtomString::ConstructFromLiteral));
> 
> const auto& heightValue = m_attributes.find("height");
> if (heightValue != m_attributes.end()) {
>- iframeElement->setAttribute(HTMLNames::styleAttr, AtomicString("max-height: 100%", AtomicString::ConstructFromLiteral));
>+ iframeElement->setAttribute(HTMLNames::styleAttr, AtomString("max-height: 100%", AtomString::ConstructFromLiteral));
> iframeElement->setAttributeWithoutSynchronization(HTMLNames::heightAttr, heightValue->value);
> }
> 
> iframeElement->setAttributeWithoutSynchronization(HTMLNames::srcAttr, youTubeURL(m_attributes.get("src")));
>- iframeElement->setAttributeWithoutSynchronization(HTMLNames::frameborderAttr, AtomicString("0", AtomicString::ConstructFromLiteral));
>+ iframeElement->setAttributeWithoutSynchronization(HTMLNames::frameborderAttr, AtomString("0", AtomString::ConstructFromLiteral));
> 
> // Disable frame flattening for this iframe.
>- iframeElement->setAttributeWithoutSynchronization(HTMLNames::scrollingAttr, AtomicString("no", AtomicString::ConstructFromLiteral));
>+ iframeElement->setAttributeWithoutSynchronization(HTMLNames::scrollingAttr, AtomString("no", AtomString::ConstructFromLiteral));
> m_embedShadowElement->appendChild(iframeElement);
> 
> return true;
>diff --git a/Source/WebCore/Modules/speech/SpeechSynthesis.cpp b/Source/WebCore/Modules/speech/SpeechSynthesis.cpp
>index ba63a7890dfc86ec062cde66d7ba50d5585d7c0b..32b65d820ac3458e2ac7d2e8676ecbec65ebb6b9 100644
>--- a/Source/WebCore/Modules/speech/SpeechSynthesis.cpp
>+++ b/Source/WebCore/Modules/speech/SpeechSynthesis.cpp
>@@ -180,7 +180,7 @@ void SpeechSynthesis::resume()
> }
> }
> 
>-void SpeechSynthesis::fireEvent(const AtomicString& type, SpeechSynthesisUtterance& utterance, unsigned long charIndex, const String& name)
>+void SpeechSynthesis::fireEvent(const AtomString& type, SpeechSynthesisUtterance& utterance, unsigned long charIndex, const String& name)
> {
> utterance.dispatchEvent(SpeechSynthesisEvent::create(type, charIndex, (MonotonicTime::now() - utterance.startTime()).seconds(), name));
> }
>diff --git a/Source/WebCore/Modules/speech/SpeechSynthesis.h b/Source/WebCore/Modules/speech/SpeechSynthesis.h
>index 4a315941188672a8681e287150a0e1ad1768a325..13315e6d6b0ed296d25677554d5fd5fa0588755a 100644
>--- a/Source/WebCore/Modules/speech/SpeechSynthesis.h
>+++ b/Source/WebCore/Modules/speech/SpeechSynthesis.h
>@@ -81,7 +81,7 @@ private:
> 
> void startSpeakingImmediately(SpeechSynthesisUtterance&);
> void handleSpeakingCompleted(SpeechSynthesisUtterance&, bool errorOccurred);
>- void fireEvent(const AtomicString& type, SpeechSynthesisUtterance&, unsigned long charIndex, const String& name);
>+ void fireEvent(const AtomString& type, SpeechSynthesisUtterance&, unsigned long charIndex, const String& name);
> 
> #if PLATFORM(IOS_FAMILY)
> // Restrictions to change default behaviors.
>diff --git a/Source/WebCore/Modules/speech/SpeechSynthesisEvent.cpp b/Source/WebCore/Modules/speech/SpeechSynthesisEvent.cpp
>index f2fe025cd9cb83f344757745bc1ba870febe8119..fb208db361a852394ab6125eff5757fde4ec1d0a 100644
>--- a/Source/WebCore/Modules/speech/SpeechSynthesisEvent.cpp
>+++ b/Source/WebCore/Modules/speech/SpeechSynthesisEvent.cpp
>@@ -30,12 +30,12 @@
> 
> namespace WebCore {
> 
>-Ref<SpeechSynthesisEvent> SpeechSynthesisEvent::create(const AtomicString& type, unsigned charIndex, float elapsedTime, const String& name)
>+Ref<SpeechSynthesisEvent> SpeechSynthesisEvent::create(const AtomString& type, unsigned charIndex, float elapsedTime, const String& name)
> {
> return adoptRef(*new SpeechSynthesisEvent(type, charIndex, elapsedTime, name));
> }
> 
>-SpeechSynthesisEvent::SpeechSynthesisEvent(const AtomicString& type, unsigned charIndex, float elapsedTime, const String& name)
>+SpeechSynthesisEvent::SpeechSynthesisEvent(const AtomString& type, unsigned charIndex, float elapsedTime, const String& name)
> : Event(type, CanBubble::No, IsCancelable::No)
> , m_charIndex(charIndex)
> , m_elapsedTime(elapsedTime)
>diff --git a/Source/WebCore/Modules/speech/SpeechSynthesisEvent.h b/Source/WebCore/Modules/speech/SpeechSynthesisEvent.h
>index 6e7204b2bd0792858c02e12a504164ed5648c3c3..2094fc19c914742bbbc4b42673f484da7ff22f5f 100644
>--- a/Source/WebCore/Modules/speech/SpeechSynthesisEvent.h
>+++ b/Source/WebCore/Modules/speech/SpeechSynthesisEvent.h
>@@ -33,7 +33,7 @@ namespace WebCore {
> 
> class SpeechSynthesisEvent : public Event {
> public:
>- static Ref<SpeechSynthesisEvent> create(const AtomicString& type, unsigned charIndex, float elapsedTime, const String& name);
>+ static Ref<SpeechSynthesisEvent> create(const AtomString& type, unsigned charIndex, float elapsedTime, const String& name);
> 
> unsigned long charIndex() const { return m_charIndex; }
> float elapsedTime() const { return m_elapsedTime; }
>@@ -42,7 +42,7 @@ public:
> virtual EventInterface eventInterface() const { return SpeechSynthesisEventInterfaceType; }
> 
> private:
>- SpeechSynthesisEvent(const AtomicString& type, unsigned charIndex, float elapsedTime, const String& name);
>+ SpeechSynthesisEvent(const AtomString& type, unsigned charIndex, float elapsedTime, const String& name);
> 
> unsigned long m_charIndex;
> float m_elapsedTime;
>diff --git a/Source/WebCore/Modules/webaudio/AudioContext.h b/Source/WebCore/Modules/webaudio/AudioContext.h
>index cf3464e6eef66cb85c483be63ec4d19df7a3d6fc..f21a8b4e1b93952ee82e063c7d73fa357bbe8574 100644
>--- a/Source/WebCore/Modules/webaudio/AudioContext.h
>+++ b/Source/WebCore/Modules/webaudio/AudioContext.h
>@@ -46,7 +46,7 @@
> #include <wtf/ThreadSafeRefCounted.h>
> #include <wtf/Threading.h>
> #include <wtf/Vector.h>
>-#include <wtf/text/AtomicStringHash.h>
>+#include <wtf/text/AtomStringHash.h>
> 
> namespace WebCore {
> 
>diff --git a/Source/WebCore/Modules/webaudio/AudioScheduledSourceNode.cpp b/Source/WebCore/Modules/webaudio/AudioScheduledSourceNode.cpp
>index 9eed877c264a5b3f11eedc885c1ceea49324e139..135895804e31421219d29e980dbb4208c1d74a1f 100644
>--- a/Source/WebCore/Modules/webaudio/AudioScheduledSourceNode.cpp
>+++ b/Source/WebCore/Modules/webaudio/AudioScheduledSourceNode.cpp
>@@ -184,7 +184,7 @@ void AudioScheduledSourceNode::finish()
> });
> }
> 
>-bool AudioScheduledSourceNode::addEventListener(const AtomicString& eventType, Ref<EventListener>&& listener, const AddEventListenerOptions& options)
>+bool AudioScheduledSourceNode::addEventListener(const AtomString& eventType, Ref<EventListener>&& listener, const AddEventListenerOptions& options)
> {
> bool success = AudioNode::addEventListener(eventType, WTFMove(listener), options);
> if (success && eventType == eventNames().endedEvent)
>@@ -192,7 +192,7 @@ bool AudioScheduledSourceNode::addEventListener(const AtomicString& eventType, R
> return success;
> }
> 
>-bool AudioScheduledSourceNode::removeEventListener(const AtomicString& eventType, EventListener& listener, const ListenerOptions& options)
>+bool AudioScheduledSourceNode::removeEventListener(const AtomString& eventType, EventListener& listener, const ListenerOptions& options)
> {
> bool success = AudioNode::removeEventListener(eventType, listener, options);
> if (success && eventType == eventNames().endedEvent)
>diff --git a/Source/WebCore/Modules/webaudio/AudioScheduledSourceNode.h b/Source/WebCore/Modules/webaudio/AudioScheduledSourceNode.h
>index 2e9c2e04fc79a3dc9278ef029cd784553764f2ec..0d5622a707b6af099ecc9c7ed18bcc5650e133fe 100644
>--- a/Source/WebCore/Modules/webaudio/AudioScheduledSourceNode.h
>+++ b/Source/WebCore/Modules/webaudio/AudioScheduledSourceNode.h
>@@ -88,8 +88,8 @@ protected:
> static const double UnknownTime;
> 
> private:
>- bool addEventListener(const AtomicString& eventType, Ref<EventListener>&&, const AddEventListenerOptions&) override;
>- bool removeEventListener(const AtomicString& eventType, EventListener&, const ListenerOptions&) override;
>+ bool addEventListener(const AtomString& eventType, Ref<EventListener>&&, const AddEventListenerOptions&) override;
>+ bool removeEventListener(const AtomString& eventType, EventListener&, const ListenerOptions&) override;
> void removeAllEventListeners() override;
> };
> 
>diff --git a/Source/WebCore/Modules/webaudio/ScriptProcessorNode.cpp b/Source/WebCore/Modules/webaudio/ScriptProcessorNode.cpp
>index d5ebd1f922ab163572bbd3b198aedd6f3236bdee..d59decf99516f6d01af9c1d9fdbf1d0b1019e40f 100644
>--- a/Source/WebCore/Modules/webaudio/ScriptProcessorNode.cpp
>+++ b/Source/WebCore/Modules/webaudio/ScriptProcessorNode.cpp
>@@ -256,7 +256,7 @@ double ScriptProcessorNode::latencyTime() const
> return std::numeric_limits<double>::infinity();
> }
> 
>-bool ScriptProcessorNode::addEventListener(const AtomicString& eventType, Ref<EventListener>&& listener, const AddEventListenerOptions& options)
>+bool ScriptProcessorNode::addEventListener(const AtomString& eventType, Ref<EventListener>&& listener, const AddEventListenerOptions& options)
> {
> bool success = AudioNode::addEventListener(eventType, WTFMove(listener), options);
> if (success && eventType == eventNames().audioprocessEvent)
>@@ -264,7 +264,7 @@ bool ScriptProcessorNode::addEventListener(const AtomicString& eventType, Ref<Ev
> return success;
> }
> 
>-bool ScriptProcessorNode::removeEventListener(const AtomicString& eventType, EventListener& listener, const ListenerOptions& options)
>+bool ScriptProcessorNode::removeEventListener(const AtomString& eventType, EventListener& listener, const ListenerOptions& options)
> {
> bool success = AudioNode::removeEventListener(eventType, listener, options);
> if (success && eventType == eventNames().audioprocessEvent)
>diff --git a/Source/WebCore/Modules/webaudio/ScriptProcessorNode.h b/Source/WebCore/Modules/webaudio/ScriptProcessorNode.h
>index 98e1f0a4773467d926deee01bf28abb2148bd645..80e1aff54fb259745452806e72063e55ee5ffafc 100644
>--- a/Source/WebCore/Modules/webaudio/ScriptProcessorNode.h
>+++ b/Source/WebCore/Modules/webaudio/ScriptProcessorNode.h
>@@ -71,8 +71,8 @@ private:
> 
> void fireProcessEvent();
> 
>- bool addEventListener(const AtomicString& eventType, Ref<EventListener>&&, const AddEventListenerOptions&) override;
>- bool removeEventListener(const AtomicString& eventType, EventListener&, const ListenerOptions&) override;
>+ bool addEventListener(const AtomString& eventType, Ref<EventListener>&&, const AddEventListenerOptions&) override;
>+ bool removeEventListener(const AtomString& eventType, EventListener&, const ListenerOptions&) override;
> void removeAllEventListeners() override;
> 
> // Double buffering
>diff --git a/Source/WebCore/Modules/webgpu/WHLSL/AST/WHLSLNativeTypeDeclaration.h b/Source/WebCore/Modules/webgpu/WHLSL/AST/WHLSLNativeTypeDeclaration.h
>index 3ae6ed6475b6c24880844bbfcbc26b59657d6248..fbd4ffbc6817a37393f66f9f6188d7c79e1ec69d 100644
>--- a/Source/WebCore/Modules/webgpu/WHLSL/AST/WHLSLNativeTypeDeclaration.h
>+++ b/Source/WebCore/Modules/webgpu/WHLSL/AST/WHLSLNativeTypeDeclaration.h
>@@ -59,7 +59,7 @@ public:
> bool isInt() const { return m_isInt; }
> bool isNumber() const { return m_isNumber; }
> bool isFloating() const { return m_isFloating; }
>- bool isAtomic() const { return m_isAtomic; }
>+ bool isAtom() const { return m_isAtomic; }
> bool isVector() const { return m_isVector; }
> bool isMatrix() const { return m_isMatrix; }
> bool isTexture() const { return m_isTexture; }
>diff --git a/Source/WebCore/Modules/webgpu/WHLSL/Metal/WHLSLNativeFunctionWriter.cpp b/Source/WebCore/Modules/webgpu/WHLSL/Metal/WHLSLNativeFunctionWriter.cpp
>index aba39d5e998dc77efb86bd2e05f9c259e1a26ab9..0ed12d2fbbc8950f6709bb46020c157648af4f95 100644
>--- a/Source/WebCore/Modules/webgpu/WHLSL/Metal/WHLSLNativeFunctionWriter.cpp
>+++ b/Source/WebCore/Modules/webgpu/WHLSL/Metal/WHLSLNativeFunctionWriter.cpp
>@@ -102,7 +102,7 @@ String writeNativeFunction(AST::NativeFunctionDeclaration& nativeFunctionDeclara
> auto& parameterNamedType = downcast<AST::NamedType>(parameterType);
> if (is<AST::NativeTypeDeclaration>(parameterNamedType)) {
> auto& parameterNativeTypeDeclaration = downcast<AST::NativeTypeDeclaration>(parameterNamedType);
>- if (parameterNativeTypeDeclaration.isAtomic()) {
>+ if (parameterNativeTypeDeclaration.isAtom()) {
> stringBuilder.append(makeString(metalReturnName, ' ', outputFunctionName, '(', metalParameterName, " x) {\n"));
> stringBuilder.append(" return atomic_load_explicit(&x, memory_order_relaxed);\n");
> stringBuilder.append("}\n");
>diff --git a/Source/WebCore/Modules/webgpu/WHLSL/WHLSLSynthesizeConstructors.cpp b/Source/WebCore/Modules/webgpu/WHLSL/WHLSLSynthesizeConstructors.cpp
>index f2850622c67afca1607022d81f4773c593a0203c..65240dcf104f37f9a055a3c1ffd39618cc2c4d65 100644
>--- a/Source/WebCore/Modules/webgpu/WHLSL/WHLSLSynthesizeConstructors.cpp
>+++ b/Source/WebCore/Modules/webgpu/WHLSL/WHLSLSynthesizeConstructors.cpp
>@@ -124,7 +124,7 @@ bool synthesizeConstructors(Program& program)
> for (auto& namedType : namedTypes) {
> if (matches(namedType, program.intrinsics().voidType()))
> continue;
>- if (is<AST::NativeTypeDeclaration>(static_cast<AST::NamedType&>(namedType)) && downcast<AST::NativeTypeDeclaration>(static_cast<AST::NamedType&>(namedType)).isAtomic())
>+ if (is<AST::NativeTypeDeclaration>(static_cast<AST::NamedType&>(namedType)) && downcast<AST::NativeTypeDeclaration>(static_cast<AST::NamedType&>(namedType)).isAtom())
> continue;
> 
> auto variableDeclaration = makeUniqueRef<AST::VariableDeclaration>(Lexer::Token(namedType.get().origin()), AST::Qualifiers(), UniqueRef<AST::UnnamedType>(AST::TypeReference::wrap(Lexer::Token(namedType.get().origin()), namedType.get())), String(), WTF::nullopt, WTF::nullopt);
>diff --git a/Source/WebCore/Modules/websockets/CloseEvent.h b/Source/WebCore/Modules/websockets/CloseEvent.h
>index bc1a0c488bbf22f6ab74fa0485083e13ed2d9f85..d7285c444756539941cba172e5f3d17bb7a28542 100644
>--- a/Source/WebCore/Modules/websockets/CloseEvent.h
>+++ b/Source/WebCore/Modules/websockets/CloseEvent.h
>@@ -48,7 +48,7 @@ public:
> String reason;
> };
> 
>- static Ref<CloseEvent> create(const AtomicString& type, const Init& initializer, IsTrusted isTrusted = IsTrusted::No)
>+ static Ref<CloseEvent> create(const AtomString& type, const Init& initializer, IsTrusted isTrusted = IsTrusted::No)
> {
> return adoptRef(*new CloseEvent(type, initializer, isTrusted));
> }
>@@ -69,7 +69,7 @@ private:
> {
> }
> 
>- CloseEvent(const AtomicString& type, const Init& initializer, IsTrusted isTrusted)
>+ CloseEvent(const AtomString& type, const Init& initializer, IsTrusted isTrusted)
> : Event(type, initializer, isTrusted)
> , m_wasClean(initializer.wasClean)
> , m_code(initializer.code)
>diff --git a/Source/WebCore/Modules/webvr/VRDisplayEvent.cpp b/Source/WebCore/Modules/webvr/VRDisplayEvent.cpp
>index 9b74c184c330d957641ea6cc2ffed9d40ae9b14f..7f14d1cdcf44a365140f11cdb743c644e44b8ca5 100644
>--- a/Source/WebCore/Modules/webvr/VRDisplayEvent.cpp
>+++ b/Source/WebCore/Modules/webvr/VRDisplayEvent.cpp
>@@ -29,14 +29,14 @@
> 
> namespace WebCore {
> 
>-VRDisplayEvent::VRDisplayEvent(const AtomicString& type, const Init& initializer, IsTrusted isTrusted)
>+VRDisplayEvent::VRDisplayEvent(const AtomString& type, const Init& initializer, IsTrusted isTrusted)
> : Event(type, initializer, isTrusted)
> , m_display(initializer.display)
> , m_reason(initializer.reason)
> {
> }
> 
>-VRDisplayEvent::VRDisplayEvent(const AtomicString& name, const RefPtr<VRDisplay>& display, Optional<VRDisplayEventReason>&& reason)
>+VRDisplayEvent::VRDisplayEvent(const AtomString& name, const RefPtr<VRDisplay>& display, Optional<VRDisplayEventReason>&& reason)
> : Event(name, CanBubble::No, IsCancelable::No)
> , m_display(display)
> , m_reason(WTFMove(reason))
>diff --git a/Source/WebCore/Modules/webvr/VRDisplayEvent.h b/Source/WebCore/Modules/webvr/VRDisplayEvent.h
>index 21ccb889be37267ca6b866920a13fcbc5697dacb..f78d44ed8fefb28d3e2403b5454f10eb092b7784 100644
>--- a/Source/WebCore/Modules/webvr/VRDisplayEvent.h
>+++ b/Source/WebCore/Modules/webvr/VRDisplayEvent.h
>@@ -32,7 +32,7 @@ namespace WebCore {
> 
> class VRDisplayEvent final : public Event {
> public:
>- static Ref<VRDisplayEvent> create(const AtomicString& type, const RefPtr<VRDisplay>& display, Optional<VRDisplayEventReason>&& reason)
>+ static Ref<VRDisplayEvent> create(const AtomString& type, const RefPtr<VRDisplay>& display, Optional<VRDisplayEventReason>&& reason)
> {
> return adoptRef(*new VRDisplayEvent(type, display, WTFMove(reason)));
> }
>@@ -42,7 +42,7 @@ public:
> Optional<VRDisplayEventReason> reason;
> };
> 
>- static Ref<VRDisplayEvent> create(const AtomicString& type, const Init& initializer, IsTrusted isTrusted = IsTrusted::No)
>+ static Ref<VRDisplayEvent> create(const AtomString& type, const Init& initializer, IsTrusted isTrusted = IsTrusted::No)
> {
> return adoptRef(*new VRDisplayEvent(type, initializer, isTrusted));
> }
>@@ -53,8 +53,8 @@ public:
> const Optional<VRDisplayEventReason>& reason() const { return m_reason; }
> 
> private:
>- VRDisplayEvent(const AtomicString&, const Init&, IsTrusted);
>- VRDisplayEvent(const AtomicString&, const RefPtr<VRDisplay>&, Optional<VRDisplayEventReason>&&);
>+ VRDisplayEvent(const AtomString&, const Init&, IsTrusted);
>+ VRDisplayEvent(const AtomString&, const RefPtr<VRDisplay>&, Optional<VRDisplayEventReason>&&);
> 
> // Event
> EventInterface eventInterface() const override;
>diff --git a/Source/WebCore/WebCorePrefix.h b/Source/WebCore/WebCorePrefix.h
>index c5a68ffc2ef24189562d4b2a40915599568546d9..782a8476ca2c8b562a9227df9b738f9aada8826c 100644
>--- a/Source/WebCore/WebCorePrefix.h
>+++ b/Source/WebCore/WebCorePrefix.h
>@@ -171,7 +171,7 @@
> #import <wtf/FastMalloc.h>
> #import <wtf/Optional.h>
> #import <wtf/StdLibExtras.h>
>-#import <wtf/text/AtomicString.h>
>+#import <wtf/text/AtomString.h>
> #import <wtf/text/WTFString.h>
> #endif
> 
>diff --git a/Source/WebCore/accessibility/AXObjectCache.cpp b/Source/WebCore/accessibility/AXObjectCache.cpp
>index a0e1a4e7156aba3d4876b6e707b644c8b3e7dd25..3c8cd97109475709422bdab2556d14d673bfe722 100644
>--- a/Source/WebCore/accessibility/AXObjectCache.cpp
>+++ b/Source/WebCore/accessibility/AXObjectCache.cpp
>@@ -851,7 +851,7 @@ void AXObjectCache::handleLiveRegionCreated(Node* node)
> Element* element = downcast<Element>(node);
> String liveRegionStatus = element->attributeWithoutSynchronization(aria_liveAttr);
> if (liveRegionStatus.isEmpty()) {
>- const AtomicString& ariaRole = element->attributeWithoutSynchronization(roleAttr);
>+ const AtomString& ariaRole = element->attributeWithoutSynchronization(roleAttr);
> if (!ariaRole.isEmpty())
> liveRegionStatus = AccessibilityObject::defaultLiveRegionStatusForRole(AccessibilityObject::ariaRoleToWebCoreRole(ariaRole));
> }
>@@ -3039,7 +3039,7 @@ bool isNodeAriaVisible(Node* node)
> bool ariaHiddenFalsePresent = false;
> for (Node* testNode = node; testNode; testNode = testNode->parentNode()) {
> if (is<Element>(*testNode)) {
>- const AtomicString& ariaHiddenValue = downcast<Element>(*testNode).attributeWithoutSynchronization(aria_hiddenAttr);
>+ const AtomString& ariaHiddenValue = downcast<Element>(*testNode).attributeWithoutSynchronization(aria_hiddenAttr);
> if (equalLettersIgnoringASCIICase(ariaHiddenValue, "true"))
> return false;
> 
>diff --git a/Source/WebCore/accessibility/AccessibilityARIAGrid.cpp b/Source/WebCore/accessibility/AccessibilityARIAGrid.cpp
>index c94ddfcf16e4d852edfa6e20142376af4c8f632c..d730988f897ecfa49abb90d33e712d60ede8529e 100644
>--- a/Source/WebCore/accessibility/AccessibilityARIAGrid.cpp
>+++ b/Source/WebCore/accessibility/AccessibilityARIAGrid.cpp
>@@ -81,7 +81,7 @@ bool AccessibilityARIAGrid::addTableCellChild(AccessibilityObject* child, HashSe
> 
> bool AccessibilityARIAGrid::isMultiSelectable() const
> {
>- const AtomicString& ariaMultiSelectable = getAttribute(HTMLNames::aria_multiselectableAttr);
>+ const AtomString& ariaMultiSelectable = getAttribute(HTMLNames::aria_multiselectableAttr);
> return !equalLettersIgnoringASCIICase(ariaMultiSelectable, "false");
> }
> 
>diff --git a/Source/WebCore/accessibility/AccessibilityImageMapLink.cpp b/Source/WebCore/accessibility/AccessibilityImageMapLink.cpp
>index e3033508c85fd1145b4f6fc28892b7bae3740029..c557978707b71d709d25986b40332695507262ec 100644
>--- a/Source/WebCore/accessibility/AccessibilityImageMapLink.cpp
>+++ b/Source/WebCore/accessibility/AccessibilityImageMapLink.cpp
>@@ -68,7 +68,7 @@ AccessibilityRole AccessibilityImageMapLink::roleValue() const
> if (!m_areaElement)
> return AccessibilityRole::WebCoreLink;
> 
>- const AtomicString& ariaRole = getAttribute(roleAttr);
>+ const AtomString& ariaRole = getAttribute(roleAttr);
> if (!ariaRole.isEmpty())
> return AccessibilityObject::ariaRoleToWebCoreRole(ariaRole);
> 
>@@ -99,21 +99,21 @@ void AccessibilityImageMapLink::accessibilityText(Vector<AccessibilityText>& tex
> if (!description.isEmpty())
> textOrder.append(AccessibilityText(description, AccessibilityTextSource::Alternative));
> 
>- const AtomicString& titleText = getAttribute(titleAttr);
>+ const AtomString& titleText = getAttribute(titleAttr);
> if (!titleText.isEmpty())
> textOrder.append(AccessibilityText(titleText, AccessibilityTextSource::TitleTag));
> 
>- const AtomicString& summary = getAttribute(summaryAttr);
>+ const AtomString& summary = getAttribute(summaryAttr);
> if (!summary.isEmpty())
> textOrder.append(AccessibilityText(summary, AccessibilityTextSource::Summary));
> }
> 
> String AccessibilityImageMapLink::accessibilityDescription() const
> {
>- const AtomicString& ariaLabel = getAttribute(aria_labelAttr);
>+ const AtomString& ariaLabel = getAttribute(aria_labelAttr);
> if (!ariaLabel.isEmpty())
> return ariaLabel;
>- const AtomicString& alt = getAttribute(altAttr);
>+ const AtomString& alt = getAttribute(altAttr);
> if (!alt.isEmpty())
> return alt;
> 
>@@ -122,10 +122,10 @@ String AccessibilityImageMapLink::accessibilityDescription() const
> 
> String AccessibilityImageMapLink::title() const
> {
>- const AtomicString& title = getAttribute(titleAttr);
>+ const AtomString& title = getAttribute(titleAttr);
> if (!title.isEmpty())
> return title;
>- const AtomicString& summary = getAttribute(summaryAttr);
>+ const AtomString& summary = getAttribute(summaryAttr);
> if (!summary.isEmpty())
> return summary;
> 
>diff --git a/Source/WebCore/accessibility/AccessibilityListBoxOption.cpp b/Source/WebCore/accessibility/AccessibilityListBoxOption.cpp
>index 417d624d1399524f8d0839b88d94231e4db4ad2d..3bda2e5bccad0402682829c907b59e85c6800d32 100644
>--- a/Source/WebCore/accessibility/AccessibilityListBoxOption.cpp
>+++ b/Source/WebCore/accessibility/AccessibilityListBoxOption.cpp
>@@ -141,7 +141,7 @@ String AccessibilityListBoxOption::stringValue() const
> if (!m_optionElement)
> return String();
> 
>- const AtomicString& ariaLabel = getAttribute(aria_labelAttr);
>+ const AtomString& ariaLabel = getAttribute(aria_labelAttr);
> if (!ariaLabel.isNull())
> return ariaLabel;
> 
>diff --git a/Source/WebCore/accessibility/AccessibilityMediaControls.h b/Source/WebCore/accessibility/AccessibilityMediaControls.h
>index 148f076729c18c6b9d6c1ee99138fd26cb1f1ce1..c985fddd3db75b8a84c7e25833e00995766d5948 100644
>--- a/Source/WebCore/accessibility/AccessibilityMediaControls.h
>+++ b/Source/WebCore/accessibility/AccessibilityMediaControls.h
>@@ -64,7 +64,7 @@ public:
> 
> String helpText() const override;
> String valueDescription() const override;
>- const AtomicString& getAttribute(const QualifiedName& attribute) const;
>+ const AtomString& getAttribute(const QualifiedName& attribute) const;
> 
> private:
> explicit AccessibilityMediaTimeline(RenderObject*);
>diff --git a/Source/WebCore/accessibility/AccessibilityNodeObject.cpp b/Source/WebCore/accessibility/AccessibilityNodeObject.cpp
>index 137c8585e8a8801361798e1d937dc0efe88fb641..a2d327f8cf17808caf25a6805a488e88f8d4e5bf 100644
>--- a/Source/WebCore/accessibility/AccessibilityNodeObject.cpp
>+++ b/Source/WebCore/accessibility/AccessibilityNodeObject.cpp
>@@ -488,7 +488,7 @@ bool AccessibilityNodeObject::isSearchField() const
> // but it will catch google.com for example.
> 
> // Check the node name of the input type, sometimes it's "search".
>- const AtomicString& nameAttribute = getAttribute(nameAttr);
>+ const AtomString& nameAttribute = getAttribute(nameAttr);
> if (nameAttribute.containsIgnoringASCIICase("search"))
> return true;
> 
>@@ -633,7 +633,7 @@ bool AccessibilityNodeObject::isEnabled() const
> {
> // ARIA says that the disabled status applies to the current element and all descendant elements.
> for (AccessibilityObject* object = const_cast<AccessibilityNodeObject*>(this); object; object = object->parentObject()) {
>- const AtomicString& disabledStatus = object->getAttribute(aria_disabledAttr);
>+ const AtomString& disabledStatus = object->getAttribute(aria_disabledAttr);
> if (equalLettersIgnoringASCIICase(disabledStatus, "true"))
> return false;
> if (equalLettersIgnoringASCIICase(disabledStatus, "false"))
>@@ -712,7 +712,7 @@ bool AccessibilityNodeObject::isHovered() const
> 
> bool AccessibilityNodeObject::isMultiSelectable() const
> {
>- const AtomicString& ariaMultiSelectable = getAttribute(aria_multiselectableAttr);
>+ const AtomString& ariaMultiSelectable = getAttribute(aria_multiselectableAttr);
> if (equalLettersIgnoringASCIICase(ariaMultiSelectable, "true"))
> return true;
> if (equalLettersIgnoringASCIICase(ariaMultiSelectable, "false"))
>@@ -724,7 +724,7 @@ bool AccessibilityNodeObject::isMultiSelectable() const
> bool AccessibilityNodeObject::isRequired() const
> {
> // Explicit aria-required values should trump native required attributes.
>- const AtomicString& requiredValue = getAttribute(aria_requiredAttr);
>+ const AtomString& requiredValue = getAttribute(aria_requiredAttr);
> if (equalLettersIgnoringASCIICase(requiredValue, "true"))
> return true;
> if (equalLettersIgnoringASCIICase(requiredValue, "false"))
>@@ -1173,7 +1173,7 @@ HTMLLabelElement* AccessibilityNodeObject::labelForElement(Element* element) con
> if (!is<HTMLElement>(*element) || !downcast<HTMLElement>(*element).isLabelable())
> return nullptr;
> 
>- const AtomicString& id = element->getIdAttribute();
>+ const AtomString& id = element->getIdAttribute();
> if (!id.isEmpty()) {
> if (HTMLLabelElement* label = element->treeScope().labelElementForId(id))
> return label;
>@@ -1188,7 +1188,7 @@ String AccessibilityNodeObject::ariaAccessibilityDescription() const
> if (!ariaLabeledBy.isEmpty())
> return ariaLabeledBy;
> 
>- const AtomicString& ariaLabel = getAttribute(aria_labelAttr);
>+ const AtomString& ariaLabel = getAttribute(aria_labelAttr);
> if (!ariaLabel.isEmpty())
> return ariaLabel;
> 
>@@ -1334,7 +1334,7 @@ void AccessibilityNodeObject::alternativeText(Vector<AccessibilityText>& textOrd
> 
> ariaLabeledByText(textOrder);
> 
>- const AtomicString& ariaLabel = getAttribute(aria_labelAttr);
>+ const AtomString& ariaLabel = getAttribute(aria_labelAttr);
> if (!ariaLabel.isEmpty())
> textOrder.append(AccessibilityText(ariaLabel, AccessibilityTextSource::Alternative));
> 
>@@ -1350,7 +1350,7 @@ void AccessibilityNodeObject::alternativeText(Vector<AccessibilityText>& textOrd
> }
> // Images should use alt as long as the attribute is present, even if empty.
> // Otherwise, it should fallback to other methods, like the title attribute.
>- const AtomicString& alt = getAttribute(altAttr);
>+ const AtomString& alt = getAttribute(altAttr);
> if (!alt.isEmpty())
> textOrder.append(AccessibilityText(alt, AccessibilityTextSource::Alternative));
> }
>@@ -1455,7 +1455,7 @@ void AccessibilityNodeObject::visibleText(Vector<AccessibilityText>& textOrder)
> 
> void AccessibilityNodeObject::helpText(Vector<AccessibilityText>& textOrder) const
> {
>- const AtomicString& ariaHelp = getAttribute(aria_helpAttr);
>+ const AtomString& ariaHelp = getAttribute(aria_helpAttr);
> if (!ariaHelp.isEmpty())
> textOrder.append(AccessibilityText(ariaHelp, AccessibilityTextSource::Help));
> 
>@@ -1472,7 +1472,7 @@ void AccessibilityNodeObject::helpText(Vector<AccessibilityText>& textOrder) con
> }
> 
> // Summary attribute used as help text on tables.
>- const AtomicString& summary = getAttribute(summaryAttr);
>+ const AtomString& summary = getAttribute(summaryAttr);
> if (!summary.isEmpty())
> textOrder.append(AccessibilityText(summary, AccessibilityTextSource::Summary));
> 
>@@ -1481,7 +1481,7 @@ void AccessibilityNodeObject::helpText(Vector<AccessibilityText>& textOrder) con
> // descriptive text. This is problematic in the case of meters because the HTML spec suggests authors
> // can expose units through this attribute. Therefore, if the element is a meter, change its source
> // type to AccessibilityTextSource::Help.
>- const AtomicString& title = getAttribute(titleAttr);
>+ const AtomString& title = getAttribute(titleAttr);
> if (!title.isEmpty()) {
> if (!isMeter() && !roleIgnoresTitle())
> textOrder.append(AccessibilityText(title, AccessibilityTextSource::TitleTag));
>@@ -1539,14 +1539,14 @@ String AccessibilityNodeObject::alternativeTextForWebArea() const
> 
> // Check if the HTML element has an aria-label for the webpage.
> if (Element* documentElement = document->documentElement()) {
>- const AtomicString& ariaLabel = documentElement->attributeWithoutSynchronization(aria_labelAttr);
>+ const AtomString& ariaLabel = documentElement->attributeWithoutSynchronization(aria_labelAttr);
> if (!ariaLabel.isEmpty())
> return ariaLabel;
> }
> 
> if (auto* owner = document->ownerElement()) {
> if (owner->hasTagName(frameTag) || owner->hasTagName(iframeTag)) {
>- const AtomicString& title = owner->attributeWithoutSynchronization(titleAttr);
>+ const AtomString& title = owner->attributeWithoutSynchronization(titleAttr);
> if (!title.isEmpty())
> return title;
> }
>@@ -1576,7 +1576,7 @@ String AccessibilityNodeObject::accessibilityDescription() const
> if (usesAltTagForTextComputation()) {
> // Images should use alt as long as the attribute is present, even if empty. 
> // Otherwise, it should fallback to other methods, like the title attribute. 
>- const AtomicString& alt = getAttribute(altAttr);
>+ const AtomString& alt = getAttribute(altAttr);
> if (!alt.isNull())
> return alt;
> }
>@@ -1619,7 +1619,7 @@ String AccessibilityNodeObject::helpText() const
> if (!node)
> return String();
> 
>- const AtomicString& ariaHelp = getAttribute(aria_helpAttr);
>+ const AtomString& ariaHelp = getAttribute(aria_helpAttr);
> if (!ariaHelp.isEmpty())
> return ariaHelp;
> 
>@@ -1631,12 +1631,12 @@ String AccessibilityNodeObject::helpText() const
> for (Node* ancestor = node; ancestor; ancestor = ancestor->parentNode()) {
> if (is<HTMLElement>(*ancestor)) {
> HTMLElement& element = downcast<HTMLElement>(*ancestor);
>- const AtomicString& summary = element.getAttribute(summaryAttr);
>+ const AtomString& summary = element.getAttribute(summaryAttr);
> if (!summary.isEmpty())
> return summary;
> 
> // The title attribute should be used as help text unless it is already being used as descriptive text.
>- const AtomicString& title = element.getAttribute(titleAttr);
>+ const AtomString& title = element.getAttribute(titleAttr);
> if (!title.isEmpty() && description != title)
> return title;
> }
>@@ -1662,7 +1662,7 @@ unsigned AccessibilityNodeObject::hierarchicalLevel() const
> if (!is<Element>(node))
> return 0;
> Element& element = downcast<Element>(*node);
>- const AtomicString& ariaLevel = element.attributeWithoutSynchronization(aria_levelAttr);
>+ const AtomString& ariaLevel = element.attributeWithoutSynchronization(aria_levelAttr);
> if (!ariaLevel.isEmpty())
> return ariaLevel.toInt();
> 
>@@ -1930,7 +1930,7 @@ String AccessibilityNodeObject::stringValue() const
> int selectedIndex = selectElement.selectedIndex();
> const Vector<HTMLElement*>& listItems = selectElement.listItems();
> if (selectedIndex >= 0 && static_cast<size_t>(selectedIndex) < listItems.size()) {
>- const AtomicString& overriddenDescription = listItems[selectedIndex]->attributeWithoutSynchronization(aria_labelAttr);
>+ const AtomString& overriddenDescription = listItems[selectedIndex]->attributeWithoutSynchronization(aria_labelAttr);
> if (!overriddenDescription.isNull())
> return overriddenDescription;
> }
>@@ -1978,11 +1978,11 @@ static String accessibleNameForNode(Node* node, Node* labelledbyNode)
> return String();
> 
> Element& element = downcast<Element>(*node);
>- const AtomicString& ariaLabel = element.attributeWithoutSynchronization(aria_labelAttr);
>+ const AtomString& ariaLabel = element.attributeWithoutSynchronization(aria_labelAttr);
> if (!ariaLabel.isEmpty())
> return ariaLabel;
> 
>- const AtomicString& alt = element.attributeWithoutSynchronization(altAttr);
>+ const AtomString& alt = element.attributeWithoutSynchronization(altAttr);
> if (!alt.isEmpty())
> return alt;
> 
>@@ -2031,7 +2031,7 @@ static String accessibleNameForNode(Node* node, Node* labelledbyNode)
> if (!text.isEmpty())
> return text;
> 
>- const AtomicString& title = element.attributeWithoutSynchronization(titleAttr);
>+ const AtomString& title = element.attributeWithoutSynchronization(titleAttr);
> if (!title.isEmpty())
> return title;
> 
>@@ -2191,7 +2191,7 @@ bool AccessibilityNodeObject::canSetValueAttribute() const
> 
> AccessibilityRole AccessibilityNodeObject::determineAriaRoleAttribute() const
> {
>- const AtomicString& ariaRole = getAttribute(roleAttr);
>+ const AtomString& ariaRole = getAttribute(roleAttr);
> if (ariaRole.isNull() || ariaRole.isEmpty())
> return AccessibilityRole::Unknown;
> 
>diff --git a/Source/WebCore/accessibility/AccessibilityObject.cpp b/Source/WebCore/accessibility/AccessibilityObject.cpp
>index 56cb15bbe8af159274a417449515d24c32e00f15..89603df71b995b9ed14947649992ddffc328f425 100644
>--- a/Source/WebCore/accessibility/AccessibilityObject.cpp
>+++ b/Source/WebCore/accessibility/AccessibilityObject.cpp
>@@ -1142,7 +1142,7 @@ Document* AccessibilityObject::topDocument() const
> 
> String AccessibilityObject::language() const
> {
>- const AtomicString& lang = getAttribute(langAttr);
>+ const AtomString& lang = getAttribute(langAttr);
> if (!lang.isEmpty())
> return lang;
> 
>@@ -1768,7 +1768,7 @@ bool AccessibilityObject::supportsAutoComplete() const
> 
> String AccessibilityObject::autoCompleteValue() const
> {
>- const AtomicString& autoComplete = getAttribute(aria_autocompleteAttr);
>+ const AtomString& autoComplete = getAttribute(aria_autocompleteAttr);
> if (equalLettersIgnoringASCIICase(autoComplete, "inline")
> || equalLettersIgnoringASCIICase(autoComplete, "list")
> || equalLettersIgnoringASCIICase(autoComplete, "both"))
>@@ -1782,7 +1782,7 @@ bool AccessibilityObject::contentEditableAttributeIsEnabled(Element* element)
> if (!element)
> return false;
> 
>- const AtomicString& contentEditableValue = element->attributeWithoutSynchronization(contenteditableAttr);
>+ const AtomString& contentEditableValue = element->attributeWithoutSynchronization(contenteditableAttr);
> if (contentEditableValue.isNull())
> return false;
> 
>@@ -2241,7 +2241,7 @@ bool AccessibilityObject::hasAttribute(const QualifiedName& attribute) const
> return downcast<Element>(*node).hasAttributeWithoutSynchronization(attribute);
> }
> 
>-const AtomicString& AccessibilityObject::getAttribute(const QualifiedName& attribute) const
>+const AtomString& AccessibilityObject::getAttribute(const QualifiedName& attribute) const
> {
> if (auto* element = this->element())
> return element->attributeWithoutSynchronization(attribute);
>@@ -2576,12 +2576,12 @@ bool AccessibilityObject::supportsDatetimeAttribute() const
> return hasTagName(insTag) || hasTagName(delTag) || hasTagName(timeTag);
> }
> 
>-const AtomicString& AccessibilityObject::datetimeAttributeValue() const
>+const AtomString& AccessibilityObject::datetimeAttributeValue() const
> {
> return getAttribute(datetimeAttr);
> }
> 
>-const AtomicString& AccessibilityObject::linkRelValue() const
>+const AtomString& AccessibilityObject::linkRelValue() const
> {
> return getAttribute(relAttr);
> }
>@@ -2633,11 +2633,11 @@ bool AccessibilityObject::isValueAutofilled() const
> 
> const String AccessibilityObject::placeholderValue() const
> {
>- const AtomicString& placeholder = getAttribute(placeholderAttr);
>+ const AtomString& placeholder = getAttribute(placeholderAttr);
> if (!placeholder.isEmpty())
> return placeholder;
> 
>- const AtomicString& ariaPlaceholder = getAttribute(aria_placeholderAttr);
>+ const AtomString& ariaPlaceholder = getAttribute(aria_placeholderAttr);
> if (!ariaPlaceholder.isEmpty())
> return ariaPlaceholder;
> 
>@@ -2679,14 +2679,14 @@ bool AccessibilityObject::supportsARIAAttributes() const
> || hasAttribute(aria_relevantAttr);
> }
> 
>-bool AccessibilityObject::liveRegionStatusIsEnabled(const AtomicString& liveRegionStatus)
>+bool AccessibilityObject::liveRegionStatusIsEnabled(const AtomString& liveRegionStatus)
> {
> return equalLettersIgnoringASCIICase(liveRegionStatus, "polite") || equalLettersIgnoringASCIICase(liveRegionStatus, "assertive");
> }
> 
> bool AccessibilityObject::supportsLiveRegion(bool excludeIfOff) const
> {
>- const AtomicString& liveRegionStatusValue = liveRegionStatus();
>+ const AtomString& liveRegionStatusValue = liveRegionStatus();
> return excludeIfOff ? liveRegionStatusIsEnabled(liveRegionStatusValue) : !liveRegionStatusValue.isEmpty();
> }
> 
>@@ -2729,7 +2729,7 @@ AccessibilitySortDirection AccessibilityObject::sortDirection() const
> if (role != AccessibilityRole::RowHeader && role != AccessibilityRole::ColumnHeader)
> return AccessibilitySortDirection::Invalid;
> 
>- const AtomicString& sortAttribute = getAttribute(aria_sortAttr);
>+ const AtomString& sortAttribute = getAttribute(aria_sortAttr);
> if (equalLettersIgnoringASCIICase(sortAttribute, "ascending"))
> return AccessibilitySortDirection::Ascending;
> if (equalLettersIgnoringASCIICase(sortAttribute, "descending"))
>@@ -2757,7 +2757,7 @@ bool AccessibilityObject::supportsHasPopup() const
> 
> String AccessibilityObject::hasPopupValue() const
> {
>- const AtomicString& hasPopup = getAttribute(aria_haspopupAttr);
>+ const AtomString& hasPopup = getAttribute(aria_haspopupAttr);
> if (equalLettersIgnoringASCIICase(hasPopup, "true")
> || equalLettersIgnoringASCIICase(hasPopup, "dialog")
> || equalLettersIgnoringASCIICase(hasPopup, "grid")
>@@ -2796,7 +2796,7 @@ int AccessibilityObject::posInSet() const
> return getAttribute(aria_posinsetAttr).toInt();
> }
> 
>-const AtomicString& AccessibilityObject::identifierAttribute() const
>+const AtomString& AccessibilityObject::identifierAttribute() const
> {
> return getAttribute(idAttr);
> }
>@@ -2816,14 +2816,14 @@ void AccessibilityObject::classList(Vector<String>& classList) const
> 
> bool AccessibilityObject::supportsPressed() const
> {
>- const AtomicString& expanded = getAttribute(aria_pressedAttr);
>+ const AtomString& expanded = getAttribute(aria_pressedAttr);
> return equalLettersIgnoringASCIICase(expanded, "true") || equalLettersIgnoringASCIICase(expanded, "false");
> }
> 
> bool AccessibilityObject::supportsExpanded() const
> {
> // Undefined values should not result in this attribute being exposed to ATs according to ARIA.
>- const AtomicString& expanded = getAttribute(aria_expandedAttr);
>+ const AtomString& expanded = getAttribute(aria_expandedAttr);
> if (equalLettersIgnoringASCIICase(expanded, "true") || equalLettersIgnoringASCIICase(expanded, "false"))
> return true;
> switch (roleValue()) {
>@@ -2876,7 +2876,7 @@ AccessibilityButtonState AccessibilityObject::checkboxOrRadioValue() const
> // If it's a toggle button, the aria-pressed attribute is consulted.
> 
> if (isToggleButton()) {
>- const AtomicString& ariaPressed = getAttribute(aria_pressedAttr);
>+ const AtomString& ariaPressed = getAttribute(aria_pressedAttr);
> if (equalLettersIgnoringASCIICase(ariaPressed, "true"))
> return AccessibilityButtonState::On;
> if (equalLettersIgnoringASCIICase(ariaPressed, "mixed"))
>@@ -2884,7 +2884,7 @@ AccessibilityButtonState AccessibilityObject::checkboxOrRadioValue() const
> return AccessibilityButtonState::Off;
> }
> 
>- const AtomicString& result = getAttribute(aria_checkedAttr);
>+ const AtomString& result = getAttribute(aria_checkedAttr);
> if (equalLettersIgnoringASCIICase(result, "true"))
> return AccessibilityButtonState::On;
> if (equalLettersIgnoringASCIICase(result, "mixed")) {
>@@ -3396,7 +3396,7 @@ void AccessibilityObject::elementsFromAttribute(Vector<Element*>& elements, cons
> 
> TreeScope& treeScope = node->treeScope();
> 
>- const AtomicString& idList = getAttribute(attribute);
>+ const AtomString& idList = getAttribute(attribute);
> if (idList.isEmpty())
> return;
> 
>@@ -3552,7 +3552,7 @@ void AccessibilityObject::ariaElementsReferencedByAttribute(AccessibilityChildre
> return;
> 
> for (auto& element : descendantsOfType<Element>(node()->treeScope().rootNode())) {
>- const AtomicString& idList = element.attributeWithoutSynchronization(attribute);
>+ const AtomString& idList = element.attributeWithoutSynchronization(attribute);
> if (!SpaceSplitString(idList, false).contains(id))
> continue;
> 
>diff --git a/Source/WebCore/accessibility/AccessibilityObject.h b/Source/WebCore/accessibility/AccessibilityObject.h
>index c2a1bb4ecca73249a8e2f184b641ac018acdf03c..b59b7d5b635967fd0fa192a59660a4eb342eb718 100644
>--- a/Source/WebCore/accessibility/AccessibilityObject.h
>+++ b/Source/WebCore/accessibility/AccessibilityObject.h
>@@ -496,7 +496,7 @@ public:
> bool hasHighlighting() const;
> 
> bool supportsDatetimeAttribute() const;
>- const AtomicString& datetimeAttributeValue() const;
>+ const AtomString& datetimeAttributeValue() const;
> 
> virtual bool canSetFocusAttribute() const { return false; }
> virtual bool canSetTextRangeAttributes() const { return false; }
>@@ -563,8 +563,8 @@ public:
> AccessibilitySortDirection sortDirection() const;
> virtual bool canvasHasFallbackContent() const { return false; }
> bool supportsRangeValue() const;
>- const AtomicString& identifierAttribute() const;
>- const AtomicString& linkRelValue() const;
>+ const AtomString& identifierAttribute() const;
>+ const AtomString& linkRelValue() const;
> void classList(Vector<String>&) const;
> virtual String roleDescription() const;
> AccessibilityCurrentState currentState() const;
>@@ -640,7 +640,7 @@ public:
> String computedLabel();
> 
> // A programmatic way to set a name on an AccessibleObject.
>- virtual void setAccessibleName(const AtomicString&) { }
>+ virtual void setAccessibleName(const AtomString&) { }
> virtual bool hasAttributesRequiredForInclusion() const;
> 
> // Accessibility Text - (To be deprecated).
>@@ -695,7 +695,7 @@ public:
> virtual URL url() const { return URL(); }
> virtual VisibleSelection selection() const { return VisibleSelection(); }
> virtual String selectedText() const { return String(); }
>- virtual const AtomicString& accessKey() const { return nullAtom(); }
>+ virtual const AtomString& accessKey() const { return nullAtom(); }
> const String& actionVerb() const;
> virtual Widget* widget() const { return nullptr; }
> virtual Widget* widgetForAttachmentView() const { return nullptr; }
>@@ -766,7 +766,7 @@ public:
> 
> WEBCORE_EXPORT static AccessibilityRole ariaRoleToWebCoreRole(const String&);
> bool hasAttribute(const QualifiedName&) const;
>- const AtomicString& getAttribute(const QualifiedName&) const;
>+ const AtomString& getAttribute(const QualifiedName&) const;
> bool hasTagName(const QualifiedName&) const;
> 
> virtual VisiblePositionRange visiblePositionRange() const { return VisiblePositionRange(); }
>@@ -859,7 +859,7 @@ public:
> virtual bool liveRegionAtomic() const { return false; }
> virtual bool isBusy() const { return false; }
> static const String defaultLiveRegionStatusForRole(AccessibilityRole);
>- static bool liveRegionStatusIsEnabled(const AtomicString&);
>+ static bool liveRegionStatusIsEnabled(const AtomString&);
> static bool contentEditableAttributeIsEnabled(Element*);
> bool hasContentEditableAttributeSet() const;
> 
>diff --git a/Source/WebCore/accessibility/AccessibilityRenderObject.cpp b/Source/WebCore/accessibility/AccessibilityRenderObject.cpp
>index 565500997d4d1433a5383dd12725a82f8a6083b8..edbdb81ee412eaf7a3a2e41ea30dfbf8969ee9a4 100644
>--- a/Source/WebCore/accessibility/AccessibilityRenderObject.cpp
>+++ b/Source/WebCore/accessibility/AccessibilityRenderObject.cpp
>@@ -579,7 +579,7 @@ String AccessibilityRenderObject::helpText() const
> if (!m_renderer)
> return String();
> 
>- const AtomicString& ariaHelp = getAttribute(aria_helpAttr);
>+ const AtomString& ariaHelp = getAttribute(aria_helpAttr);
> if (!ariaHelp.isEmpty())
> return ariaHelp;
> 
>@@ -591,12 +591,12 @@ String AccessibilityRenderObject::helpText() const
> for (RenderObject* ancestor = renderer(); ancestor; ancestor = ancestor->parent()) {
> if (is<HTMLElement>(ancestor->node())) {
> HTMLElement& element = downcast<HTMLElement>(*ancestor->node());
>- const AtomicString& summary = element.getAttribute(summaryAttr);
>+ const AtomString& summary = element.getAttribute(summaryAttr);
> if (!summary.isEmpty())
> return summary;
> 
> // The title attribute should be used as help text unless it is already being used as descriptive text.
>- const AtomicString& title = element.getAttribute(titleAttr);
>+ const AtomString& title = element.getAttribute(titleAttr);
> if (!title.isEmpty() && description != title)
> return title;
> }
>@@ -749,7 +749,7 @@ String AccessibilityRenderObject::stringValue() const
> int selectedIndex = selectElement.selectedIndex();
> const Vector<HTMLElement*>& listItems = selectElement.listItems();
> if (selectedIndex >= 0 && static_cast<size_t>(selectedIndex) < listItems.size()) {
>- const AtomicString& overriddenDescription = listItems[selectedIndex]->attributeWithoutSynchronization(aria_labelAttr);
>+ const AtomString& overriddenDescription = listItems[selectedIndex]->attributeWithoutSynchronization(aria_labelAttr);
> if (!overriddenDescription.isNull())
> return overriddenDescription;
> }
>@@ -1037,13 +1037,13 @@ bool AccessibilityRenderObject::hasPopup() const
> 
> bool AccessibilityRenderObject::supportsARIADropping() const 
> {
>- const AtomicString& dropEffect = getAttribute(aria_dropeffectAttr);
>+ const AtomString& dropEffect = getAttribute(aria_dropeffectAttr);
> return !dropEffect.isEmpty();
> }
> 
> bool AccessibilityRenderObject::supportsARIADragging() const
> {
>- const AtomicString& grabbed = getAttribute(aria_grabbedAttr);
>+ const AtomString& grabbed = getAttribute(aria_grabbedAttr);
> return equalLettersIgnoringASCIICase(grabbed, "true") || equalLettersIgnoringASCIICase(grabbed, "false");
> }
> 
>@@ -1054,7 +1054,7 @@ bool AccessibilityRenderObject::isARIAGrabbed()
> 
> Vector<String> AccessibilityRenderObject::determineARIADropEffects()
> {
>- const AtomicString& dropEffects = getAttribute(aria_dropeffectAttr);
>+ const AtomString& dropEffects = getAttribute(aria_dropeffectAttr);
> if (dropEffects.isEmpty()) {
> return { };
> }
>@@ -1566,7 +1566,7 @@ String AccessibilityRenderObject::selectedText() const
> return doAXStringForRange(documentBasedSelectedTextRange());
> }
> 
>-const AtomicString& AccessibilityRenderObject::accessKey() const
>+const AtomString& AccessibilityRenderObject::accessKey() const
> {
> Node* node = m_renderer->node();
> if (!is<Element>(node))
>@@ -1848,7 +1848,7 @@ bool AccessibilityRenderObject::supportsARIAOwns() const
> {
> if (!m_renderer)
> return false;
>- const AtomicString& ariaOwns = getAttribute(aria_ownsAttr);
>+ const AtomString& ariaOwns = getAttribute(aria_ownsAttr);
> 
> return !ariaOwns.isEmpty();
> }
>@@ -2511,7 +2511,7 @@ AccessibilityObject* AccessibilityRenderObject::activeDescendant() const
> if (!m_renderer)
> return nullptr;
> 
>- const AtomicString& activeDescendantAttrStr = getAttribute(aria_activedescendantAttr);
>+ const AtomString& activeDescendantAttrStr = getAttribute(aria_activedescendantAttr);
> if (activeDescendantAttrStr.isNull() || activeDescendantAttrStr.isEmpty())
> return nullptr;
> Element* element = this->element();
>@@ -2961,7 +2961,7 @@ AccessibilityRole AccessibilityRenderObject::determineAccessibilityRole()
> 
> AccessibilityOrientation AccessibilityRenderObject::orientation() const
> {
>- const AtomicString& ariaOrientation = getAttribute(aria_orientationAttr);
>+ const AtomString& ariaOrientation = getAttribute(aria_orientationAttr);
> if (equalLettersIgnoringASCIICase(ariaOrientation, "horizontal"))
> return AccessibilityOrientation::Horizontal;
> if (equalLettersIgnoringASCIICase(ariaOrientation, "vertical"))
>@@ -3062,7 +3062,7 @@ bool AccessibilityRenderObject::canSetExpandedAttribute() const
> return true;
> 
> // An object can be expanded if it aria-expanded is true or false.
>- const AtomicString& expanded = getAttribute(aria_expandedAttr);
>+ const AtomString& expanded = getAttribute(aria_expandedAttr);
> if (equalLettersIgnoringASCIICase(expanded, "true") || equalLettersIgnoringASCIICase(expanded, "false"))
> return true;
> return false;
>@@ -3380,7 +3380,7 @@ bool AccessibilityRenderObject::canHaveChildren() const
> 
> const String AccessibilityRenderObject::liveRegionStatus() const
> {
>- const AtomicString& liveRegionStatus = getAttribute(aria_liveAttr);
>+ const AtomString& liveRegionStatus = getAttribute(aria_liveAttr);
> // These roles have implicit live region status.
> if (liveRegionStatus.isEmpty())
> return defaultLiveRegionStatusForRole(roleValue());
>@@ -3390,8 +3390,8 @@ const String AccessibilityRenderObject::liveRegionStatus() const
> 
> const String AccessibilityRenderObject::liveRegionRelevant() const
> {
>- static NeverDestroyed<const AtomicString> defaultLiveRegionRelevant("additions text", AtomicString::ConstructFromLiteral);
>- const AtomicString& relevant = getAttribute(aria_relevantAttr);
>+ static NeverDestroyed<const AtomString> defaultLiveRegionRelevant("additions text", AtomString::ConstructFromLiteral);
>+ const AtomString& relevant = getAttribute(aria_relevantAttr);
> 
> // Default aria-relevant = "additions text".
> if (relevant.isEmpty())
>@@ -3402,7 +3402,7 @@ const String AccessibilityRenderObject::liveRegionRelevant() const
> 
> bool AccessibilityRenderObject::liveRegionAtomic() const
> {
>- const AtomicString& atomic = getAttribute(aria_atomicAttr);
>+ const AtomString& atomic = getAttribute(aria_atomicAttr);
> if (equalLettersIgnoringASCIICase(atomic, "true"))
> return true;
> if (equalLettersIgnoringASCIICase(atomic, "false"))
>@@ -3600,7 +3600,7 @@ const String& AccessibilityRenderObject::actionVerb() const
> #endif
> }
> 
>-void AccessibilityRenderObject::setAccessibleName(const AtomicString& name)
>+void AccessibilityRenderObject::setAccessibleName(const AtomString& name)
> {
> // Setting the accessible name can store the value in the DOM
> if (!m_renderer)
>diff --git a/Source/WebCore/accessibility/AccessibilityRenderObject.h b/Source/WebCore/accessibility/AccessibilityRenderObject.h
>index b12039abea50a8447a9e91acc68966572e754742..0b19da52abe6c1f15872980b274e5dd4aae02bfc 100644
>--- a/Source/WebCore/accessibility/AccessibilityRenderObject.h
>+++ b/Source/WebCore/accessibility/AccessibilityRenderObject.h
>@@ -80,7 +80,7 @@ public:
> bool canSetTextRangeAttributes() const override;
> bool canSetExpandedAttribute() const override;
> 
>- void setAccessibleName(const AtomicString&) override;
>+ void setAccessibleName(const AtomString&) override;
> 
> // Provides common logic used by all elements when determining isIgnored.
> AccessibilityObjectInclusion defaultObjectInclusion() const override;
>@@ -134,7 +134,7 @@ public:
> String text() const override;
> int textLength() const override;
> String selectedText() const override;
>- const AtomicString& accessKey() const override;
>+ const AtomString& accessKey() const override;
> virtual const String& actionVerb() const;
> Widget* widget() const override;
> Widget* widgetForAttachmentView() const override;
>diff --git a/Source/WebCore/accessibility/AccessibilitySVGElement.cpp b/Source/WebCore/accessibility/AccessibilitySVGElement.cpp
>index 9eb4e92fa56babd5d30e583370a68d977322d704..b06688635e6ef0ed79cbd4c59f23b308c982ae28 100644
>--- a/Source/WebCore/accessibility/AccessibilitySVGElement.cpp
>+++ b/Source/WebCore/accessibility/AccessibilitySVGElement.cpp
>@@ -157,7 +157,7 @@ String AccessibilitySVGElement::accessibilityDescription() const
> // listed as a supported attribute of the 'image' element in the SVG spec:
> // https://www.w3.org/TR/SVG/struct.html#ImageElement
> if (m_renderer->isSVGImage()) {
>- const AtomicString& alt = getAttribute(HTMLNames::altAttr);
>+ const AtomString& alt = getAttribute(HTMLNames::altAttr);
> if (!alt.isNull())
> return alt;
> }
>diff --git a/Source/WebCore/accessibility/AccessibilitySlider.cpp b/Source/WebCore/accessibility/AccessibilitySlider.cpp
>index 12229dc06625a8143882acf50a2110b97dba7e23..b3ff0a975108f1383a9682fe02c16c69095f67d3 100644
>--- a/Source/WebCore/accessibility/AccessibilitySlider.cpp
>+++ b/Source/WebCore/accessibility/AccessibilitySlider.cpp
>@@ -95,7 +95,7 @@ void AccessibilitySlider::addChildren()
> m_children.append(&thumb);
> }
> 
>-const AtomicString& AccessibilitySlider::getAttribute(const QualifiedName& attribute) const
>+const AtomString& AccessibilitySlider::getAttribute(const QualifiedName& attribute) const
> {
> return inputElement()->getAttribute(attribute);
> }
>diff --git a/Source/WebCore/accessibility/AccessibilitySlider.h b/Source/WebCore/accessibility/AccessibilitySlider.h
>index f1c78c1eac1ee03cdc951f929187f2fcc20f68da..469d21701bec53af19d97bf45e0eee1bdc226c45 100644
>--- a/Source/WebCore/accessibility/AccessibilitySlider.h
>+++ b/Source/WebCore/accessibility/AccessibilitySlider.h
>@@ -55,7 +55,7 @@ private:
> void addChildren() override;
> 
> bool canSetValueAttribute() const override { return true; }
>- const AtomicString& getAttribute(const QualifiedName& attribute) const;
>+ const AtomString& getAttribute(const QualifiedName& attribute) const;
> 
> void setValue(const String&) override;
> float valueForRange() const override;
>diff --git a/Source/WebCore/accessibility/AccessibilityTable.cpp b/Source/WebCore/accessibility/AccessibilityTable.cpp
>index 9df9d276b46573c2df450746d46abafabda1b375..f5bf5b2f60ff857c8a6de925a0bd30f7cd86fe01 100644
>--- a/Source/WebCore/accessibility/AccessibilityTable.cpp
>+++ b/Source/WebCore/accessibility/AccessibilityTable.cpp
>@@ -700,7 +700,7 @@ String AccessibilityTable::title() const
> 
> int AccessibilityTable::axColumnCount() const
> {
>- const AtomicString& colCountValue = getAttribute(aria_colcountAttr);
>+ const AtomString& colCountValue = getAttribute(aria_colcountAttr);
> int colCountInt = colCountValue.toInt();
> // The ARIA spec states, "Authors must set the value of aria-colcount to an integer equal to the
> // number of columns in the full table. If the total number of columns is unknown, authors must
>@@ -714,7 +714,7 @@ int AccessibilityTable::axColumnCount() const
> 
> int AccessibilityTable::axRowCount() const
> {
>- const AtomicString& rowCountValue = getAttribute(aria_rowcountAttr);
>+ const AtomString& rowCountValue = getAttribute(aria_rowcountAttr);
> int rowCountInt = rowCountValue.toInt();
> // The ARIA spec states, "Authors must set the value of aria-rowcount to an integer equal to the
> // number of rows in the full table. If the total number of rows is unknown, authors must set
>diff --git a/Source/WebCore/accessibility/AccessibilityTableCell.cpp b/Source/WebCore/accessibility/AccessibilityTableCell.cpp
>index f29e3bf026e355ffff3dd751d6ded56ac7bccfc8..9bbad11296e5e1c70593725b629846fa956b4400 100644
>--- a/Source/WebCore/accessibility/AccessibilityTableCell.cpp
>+++ b/Source/WebCore/accessibility/AccessibilityTableCell.cpp
>@@ -148,7 +148,7 @@ bool AccessibilityTableCell::isTableHeaderCell() const
> 
> bool AccessibilityTableCell::isColumnHeaderCell() const
> {
>- const AtomicString& scope = getAttribute(scopeAttr);
>+ const AtomString& scope = getAttribute(scopeAttr);
> if (scope == "col" || scope == "colgroup")
> return true;
> if (scope == "row" || scope == "rowgroup")
>@@ -177,7 +177,7 @@ bool AccessibilityTableCell::isColumnHeaderCell() const
> 
> bool AccessibilityTableCell::isRowHeaderCell() const
> {
>- const AtomicString& scope = getAttribute(scopeAttr);
>+ const AtomString& scope = getAttribute(scopeAttr);
> if (scope == "row" || scope == "rowgroup")
> return true;
> if (scope == "col" || scope == "colgroup")
>@@ -269,7 +269,7 @@ void AccessibilityTableCell::columnHeaders(AccessibilityChildrenVector& headers)
> std::pair<unsigned, unsigned> childRowRange;
> tableCell->rowIndexRange(childRowRange);
> 
>- const AtomicString& scope = tableCell->getAttribute(scopeAttr);
>+ const AtomString& scope = tableCell->getAttribute(scopeAttr);
> if (scope == "colgroup" && isTableCellInSameColGroup(tableCell))
> headers.append(tableCell);
> else if (tableCell->isColumnHeaderCell())
>@@ -294,7 +294,7 @@ void AccessibilityTableCell::rowHeaders(AccessibilityChildrenVector& headers)
> if (!tableCell || tableCell == this || headers.contains(tableCell))
> continue;
> 
>- const AtomicString& scope = tableCell->getAttribute(scopeAttr);
>+ const AtomString& scope = tableCell->getAttribute(scopeAttr);
> if (scope == "rowgroup" && isTableCellInSameRowGroup(tableCell))
> headers.append(tableCell);
> else if (tableCell->isRowHeaderCell())
>@@ -385,7 +385,7 @@ AccessibilityObject* AccessibilityTableCell::titleUIElement() const
> 
> int AccessibilityTableCell::axColumnIndex() const
> {
>- const AtomicString& colIndexValue = getAttribute(aria_colindexAttr);
>+ const AtomString& colIndexValue = getAttribute(aria_colindexAttr);
> if (colIndexValue.toInt() >= 1)
> return colIndexValue.toInt();
> 
>@@ -403,7 +403,7 @@ int AccessibilityTableCell::axRowIndex() const
> {
> // ARIA 1.1: Authors should place aria-rowindex on each row. Authors may also place
> // aria-rowindex on all of the children or owned elements of each row.
>- const AtomicString& rowIndexValue = getAttribute(aria_rowindexAttr);
>+ const AtomString& rowIndexValue = getAttribute(aria_rowindexAttr);
> if (rowIndexValue.toInt() >= 1)
> return rowIndexValue.toInt();
> 
>@@ -420,7 +420,7 @@ int AccessibilityTableCell::axColumnSpan() const
> if (hasAttribute(colspanAttr))
> return -1;
> 
>- const AtomicString& colSpanValue = getAttribute(aria_colspanAttr);
>+ const AtomString& colSpanValue = getAttribute(aria_colspanAttr);
> // ARIA 1.1: Authors must set the value of aria-colspan to an integer greater than or equal to 1.
> if (colSpanValue.toInt() >= 1)
> return colSpanValue.toInt();
>@@ -435,7 +435,7 @@ int AccessibilityTableCell::axRowSpan() const
> if (hasAttribute(rowspanAttr))
> return -1;
> 
>- const AtomicString& rowSpanValue = getAttribute(aria_rowspanAttr);
>+ const AtomString& rowSpanValue = getAttribute(aria_rowspanAttr);
> 
> // ARIA 1.1: Authors must set the value of aria-rowspan to an integer greater than or equal to 0.
> // Setting the value to 0 indicates that the cell or gridcell is to span all the remaining rows in the row group.
>diff --git a/Source/WebCore/accessibility/AccessibilityTableRow.cpp b/Source/WebCore/accessibility/AccessibilityTableRow.cpp
>index 335a89fb816df56e260f7ecf79be9a2d96aef3a7..bb9d9e04c4df486adb756c33adef1da05599327f 100644
>--- a/Source/WebCore/accessibility/AccessibilityTableRow.cpp
>+++ b/Source/WebCore/accessibility/AccessibilityTableRow.cpp
>@@ -169,7 +169,7 @@ void AccessibilityTableRow::addChildren()
> 
> int AccessibilityTableRow::axColumnIndex() const
> {
>- const AtomicString& colIndexValue = getAttribute(aria_colindexAttr);
>+ const AtomString& colIndexValue = getAttribute(aria_colindexAttr);
> if (colIndexValue.toInt() >= 1)
> return colIndexValue.toInt();
> 
>@@ -178,7 +178,7 @@ int AccessibilityTableRow::axColumnIndex() const
> 
> int AccessibilityTableRow::axRowIndex() const
> {
>- const AtomicString& rowIndexValue = getAttribute(aria_rowindexAttr);
>+ const AtomString& rowIndexValue = getAttribute(aria_rowindexAttr);
> if (rowIndexValue.toInt() >= 1)
> return rowIndexValue.toInt();
> 
>diff --git a/Source/WebCore/accessibility/AccessibleSetValueEvent.cpp b/Source/WebCore/accessibility/AccessibleSetValueEvent.cpp
>index 0f81afb25e6da07924f0540d8fcd748d88ee2fb5..dfde5fc0d10f88bd4298dfd3455458030c1d3239 100644
>--- a/Source/WebCore/accessibility/AccessibleSetValueEvent.cpp
>+++ b/Source/WebCore/accessibility/AccessibleSetValueEvent.cpp
>@@ -28,7 +28,7 @@
> 
> namespace WebCore {
> 
>-AccessibleSetValueEvent::AccessibleSetValueEvent(const AtomicString& type, const AtomicString& value)
>+AccessibleSetValueEvent::AccessibleSetValueEvent(const AtomString& type, const AtomString& value)
> : Event(type, CanBubble::Yes, IsCancelable::Yes)
> , m_value(value)
> {
>diff --git a/Source/WebCore/accessibility/AccessibleSetValueEvent.h b/Source/WebCore/accessibility/AccessibleSetValueEvent.h
>index 02233c1bdebe9caf8fb3dfeff44b9ff52986388e..57e8045dece036a9f8451e05b0cfec0f195fcf74 100644
>--- a/Source/WebCore/accessibility/AccessibleSetValueEvent.h
>+++ b/Source/WebCore/accessibility/AccessibleSetValueEvent.h
>@@ -31,23 +31,23 @@ namespace WebCore {
> 
> class AccessibleSetValueEvent : public Event {
> public:
>- static Ref<AccessibleSetValueEvent> create(const AtomicString& type, const AtomicString& value)
>+ static Ref<AccessibleSetValueEvent> create(const AtomString& type, const AtomString& value)
> {
> return adoptRef(*new AccessibleSetValueEvent(type, value));
> }
> 
> virtual ~AccessibleSetValueEvent();
> 
>- const AtomicString& value() const { return m_value; }
>+ const AtomString& value() const { return m_value; }
> 
> protected:
>- AccessibleSetValueEvent(const AtomicString& type, const AtomicString& value);
>+ AccessibleSetValueEvent(const AtomString& type, const AtomString& value);
> 
> // Event.
> EventInterface eventInterface() const override { return AccessibleSetValueEventInterfaceType; }
> 
> private:
>- const AtomicString m_value;
>+ const AtomString m_value;
> };
> 
> }
>diff --git a/Source/WebCore/accessibility/atk/WebKitAccessible.cpp b/Source/WebCore/accessibility/atk/WebKitAccessible.cpp
>index 63b0382892a492f3f2f87e740d503b20d29462c5..9c77a04a4ce9a0440daaa0036786c0d19503d0a2 100644
>--- a/Source/WebCore/accessibility/atk/WebKitAccessible.cpp
>+++ b/Source/WebCore/accessibility/atk/WebKitAccessible.cpp
>@@ -532,14 +532,14 @@ static AtkAttributeSet* webkitAccessibleGetAttributes(AtkObject* object)
> if (auto liveContainer = coreObject->liveRegionAncestor(false)) {
> String liveStatus = liveContainer->liveRegionStatus();
> String relevant = liveContainer->liveRegionRelevant();
>- bool isAtomic = liveContainer->liveRegionAtomic();
>+ bool isAtom = liveContainer->liveRegionAtomic();
> String liveRole = roleString.isEmpty() ? computedRoleString : roleString;
> 
> // According to the Core AAM, we need to expose the above properties with "container-" prefixed
> // object attributes regardless of whether the container is this object, or an ancestor of it.
> attributeSet = addToAtkAttributeSet(attributeSet, "container-live", liveStatus.utf8().data());
> attributeSet = addToAtkAttributeSet(attributeSet, "container-relevant", relevant.utf8().data());
>- if (isAtomic)
>+ if (isAtom)
> attributeSet = addToAtkAttributeSet(attributeSet, "container-atomic", "true");
> if (!liveRole.isEmpty())
> attributeSet = addToAtkAttributeSet(attributeSet, "container-live-role", liveRole.utf8().data());
>@@ -549,9 +549,9 @@ static AtkAttributeSet* webkitAccessibleGetAttributes(AtkObject* object)
> if (liveContainer == coreObject) {
> attributeSet = addToAtkAttributeSet(attributeSet, "live", liveStatus.utf8().data());
> attributeSet = addToAtkAttributeSet(attributeSet, "relevant", relevant.utf8().data());
>- if (isAtomic)
>+ if (isAtom)
> attributeSet = addToAtkAttributeSet(attributeSet, "atomic", "true");
>- } else if (!isAtomic && coreObject->liveRegionAtomic())
>+ } else if (!isAtom && coreObject->liveRegionAtomic())
> attributeSet = addToAtkAttributeSet(attributeSet, "atomic", "true");
> }
> 
>@@ -566,7 +566,7 @@ static AtkAttributeSet* webkitAccessibleGetAttributes(AtkObject* object)
> attributeSet = addToAtkAttributeSet(attributeSet, "grabbed", "false");
> 
> // The Core AAM states the author-provided value should be exposed as-is.
>- const AtomicString& keyShortcuts = coreObject->keyShortcutsValue();
>+ const AtomString& keyShortcuts = coreObject->keyShortcutsValue();
> if (!keyShortcuts.isEmpty())
> attributeSet = addToAtkAttributeSet(attributeSet, "keyshortcuts", keyShortcuts.string().utf8().data());
> 
>diff --git a/Source/WebCore/accessibility/atk/WebKitAccessibleUtil.cpp b/Source/WebCore/accessibility/atk/WebKitAccessibleUtil.cpp
>index a2f5936b716efcb70b392490c8f56d27936d27b9..3f89ce646532bb2fc570d41102d285607897e5f3 100644
>--- a/Source/WebCore/accessibility/atk/WebKitAccessibleUtil.cpp
>+++ b/Source/WebCore/accessibility/atk/WebKitAccessibleUtil.cpp
>@@ -43,7 +43,7 @@
> #include "TextIterator.h"
> #include "VisibleSelection.h"
> 
>-#include <wtf/text/AtomicString.h>
>+#include <wtf/text/AtomString.h>
> #include <wtf/text/CString.h>
> 
> using namespace WebCore;
>diff --git a/Source/WebCore/accessibility/mac/WebAccessibilityObjectWrapperMac.mm b/Source/WebCore/accessibility/mac/WebAccessibilityObjectWrapperMac.mm
>index 0e0dcc45d597872c36c4cdca2918674cb5ba846d..f43203834bf60b8711ee2d0a1dac202bdf3b470e 100644
>--- a/Source/WebCore/accessibility/mac/WebAccessibilityObjectWrapperMac.mm
>+++ b/Source/WebCore/accessibility/mac/WebAccessibilityObjectWrapperMac.mm
>@@ -2433,7 +2433,7 @@ - (NSString*)roleDescription
> return [[self attachmentView] accessibilityAttributeValue:NSAccessibilityRoleDescriptionAttribute];
> ALLOW_DEPRECATED_DECLARATIONS_END
> 
>- const AtomicString& overrideRoleDescription = m_object->roleDescription();
>+ const AtomString& overrideRoleDescription = m_object->roleDescription();
> if (!overrideRoleDescription.isNull() && !overrideRoleDescription.isEmpty())
> return overrideRoleDescription;
> 
>@@ -2912,7 +2912,7 @@ IGNORE_WARNINGS_END
> }
> 
> if ([attributeName isEqualToString:NSAccessibilityAccessKeyAttribute]) {
>- AtomicString accessKey = m_object->accessKey();
>+ AtomString accessKey = m_object->accessKey();
> if (accessKey.isNull())
> return nil;
> return accessKey;
>diff --git a/Source/WebCore/accessibility/win/AccessibilityObjectWrapperWin.cpp b/Source/WebCore/accessibility/win/AccessibilityObjectWrapperWin.cpp
>index a8e72f9981673046a1a659a0f99109a8853e88c5..09aa64e23ba4f9bf24b5cc1f79de6cbf390be399 100644
>--- a/Source/WebCore/accessibility/win/AccessibilityObjectWrapperWin.cpp
>+++ b/Source/WebCore/accessibility/win/AccessibilityObjectWrapperWin.cpp
>@@ -37,7 +37,7 @@
> 
> namespace WebCore {
> 
>-void AccessibilityObjectWrapper::accessibilityAttributeValue(const AtomicString& attributeName, VARIANT* result)
>+void AccessibilityObjectWrapper::accessibilityAttributeValue(const AtomString& attributeName, VARIANT* result)
> {
> // FIXME: This should be fleshed out to match the Mac version
> 
>diff --git a/Source/WebCore/accessibility/win/AccessibilityObjectWrapperWin.h b/Source/WebCore/accessibility/win/AccessibilityObjectWrapperWin.h
>index a65ad295e266b64fc9378b213d2e4d441942054d..c86c34a97efed10ab0e770d4dc77aa3f20d10f12 100644
>--- a/Source/WebCore/accessibility/win/AccessibilityObjectWrapperWin.h
>+++ b/Source/WebCore/accessibility/win/AccessibilityObjectWrapperWin.h
>@@ -26,7 +26,7 @@
> #pragma once
> 
> #include <unknwn.h>
>-#include <wtf/text/AtomicString.h>
>+#include <wtf/text/AtomString.h>
> 
> namespace WebCore {
> 
>@@ -43,7 +43,7 @@ namespace WebCore {
> bool attached() const { return m_object; }
> AccessibilityObject* accessibilityObject() const { return m_object; }
> 
>- void accessibilityAttributeValue(const AtomicString&, VARIANT*);
>+ void accessibilityAttributeValue(const AtomString&, VARIANT*);
> 
> protected:
> AccessibilityObjectWrapper(AccessibilityObject* obj) : m_object(obj) { }
>diff --git a/Source/WebCore/animation/AnimationPlaybackEvent.cpp b/Source/WebCore/animation/AnimationPlaybackEvent.cpp
>index 3ad1aedb20257b886196ad9a546a015f061f9ce3..adfb503be5edbcec72aa55d9e0eae73ccfa6154a 100644
>--- a/Source/WebCore/animation/AnimationPlaybackEvent.cpp
>+++ b/Source/WebCore/animation/AnimationPlaybackEvent.cpp
>@@ -30,7 +30,7 @@
> 
> namespace WebCore {
> 
>-AnimationPlaybackEvent::AnimationPlaybackEvent(const AtomicString& type, const AnimationPlaybackEventInit& initializer, IsTrusted isTrusted)
>+AnimationPlaybackEvent::AnimationPlaybackEvent(const AtomString& type, const AnimationPlaybackEventInit& initializer, IsTrusted isTrusted)
> : Event(type, initializer, isTrusted)
> {
> if (initializer.currentTime)
>@@ -44,7 +44,7 @@ AnimationPlaybackEvent::AnimationPlaybackEvent(const AtomicString& type, const A
> m_timelineTime = WTF::nullopt;
> }
> 
>-AnimationPlaybackEvent::AnimationPlaybackEvent(const AtomicString& type, Optional<Seconds> currentTime, Optional<Seconds> timelineTime)
>+AnimationPlaybackEvent::AnimationPlaybackEvent(const AtomString& type, Optional<Seconds> currentTime, Optional<Seconds> timelineTime)
> : Event(type, CanBubble::Yes, IsCancelable::No)
> , m_currentTime(currentTime)
> , m_timelineTime(timelineTime)
>diff --git a/Source/WebCore/animation/AnimationPlaybackEvent.h b/Source/WebCore/animation/AnimationPlaybackEvent.h
>index ea88d14ed91fdfa62999c1e4c8cb53d7a3afd5c2..7d1cc3a8721b759b3ed253962a76a031a6941520 100644
>--- a/Source/WebCore/animation/AnimationPlaybackEvent.h
>+++ b/Source/WebCore/animation/AnimationPlaybackEvent.h
>@@ -33,12 +33,12 @@ namespace WebCore {
> 
> class AnimationPlaybackEvent final : public Event {
> public:
>- static Ref<AnimationPlaybackEvent> create(const AtomicString& type, Optional<Seconds> currentTime, Optional<Seconds> timelineTime)
>+ static Ref<AnimationPlaybackEvent> create(const AtomString& type, Optional<Seconds> currentTime, Optional<Seconds> timelineTime)
> {
> return adoptRef(*new AnimationPlaybackEvent(type, currentTime, timelineTime));
> }
> 
>- static Ref<AnimationPlaybackEvent> create(const AtomicString& type, const AnimationPlaybackEventInit& initializer, IsTrusted isTrusted = IsTrusted::No)
>+ static Ref<AnimationPlaybackEvent> create(const AtomString& type, const AnimationPlaybackEventInit& initializer, IsTrusted isTrusted = IsTrusted::No)
> {
> return adoptRef(*new AnimationPlaybackEvent(type, initializer, isTrusted));
> }
>@@ -53,8 +53,8 @@ public:
> EventInterface eventInterface() const override { return AnimationPlaybackEventInterfaceType; }
> 
> private:
>- AnimationPlaybackEvent(const AtomicString&, Optional<Seconds>, Optional<Seconds>);
>- AnimationPlaybackEvent(const AtomicString&, const AnimationPlaybackEventInit&, IsTrusted);
>+ AnimationPlaybackEvent(const AtomString&, Optional<Seconds>, Optional<Seconds>);
>+ AnimationPlaybackEvent(const AtomString&, const AnimationPlaybackEventInit&, IsTrusted);
> 
> Markable<Seconds, Seconds::MarkableTraits> m_currentTime;
> Markable<Seconds, Seconds::MarkableTraits> m_timelineTime;
>diff --git a/Source/WebCore/animation/DeclarativeAnimation.cpp b/Source/WebCore/animation/DeclarativeAnimation.cpp
>index 03155c75900b7be499da2f6230f622e3f1b6413d..2a603daaa6010d646457901786f670550c54d613 100644
>--- a/Source/WebCore/animation/DeclarativeAnimation.cpp
>+++ b/Source/WebCore/animation/DeclarativeAnimation.cpp
>@@ -330,7 +330,7 @@ void DeclarativeAnimation::invalidateDOMEvents(Seconds elapsedTime)
> m_previousIteration = iteration;
> }
> 
>-void DeclarativeAnimation::enqueueDOMEvent(const AtomicString& eventType, Seconds elapsedTime)
>+void DeclarativeAnimation::enqueueDOMEvent(const AtomString& eventType, Seconds elapsedTime)
> {
> ASSERT(m_owningElement);
> auto time = secondsToWebAnimationsAPITime(elapsedTime) / 1000;
>diff --git a/Source/WebCore/animation/DeclarativeAnimation.h b/Source/WebCore/animation/DeclarativeAnimation.h
>index d95838fbd8a7464e0a09e2fcebe0161e2edc93b6..c6a740a6582e456bdbad8b3a52c97cd576014170 100644
>--- a/Source/WebCore/animation/DeclarativeAnimation.h
>+++ b/Source/WebCore/animation/DeclarativeAnimation.h
>@@ -77,7 +77,7 @@ private:
> void disassociateFromOwningElement();
> void flushPendingStyleChanges() const;
> AnimationEffectPhase phaseWithoutEffect() const;
>- void enqueueDOMEvent(const AtomicString&, Seconds);
>+ void enqueueDOMEvent(const AtomString&, Seconds);
> void remove() final;
> 
> // ActiveDOMObject.
>diff --git a/Source/WebCore/animation/KeyframeEffect.cpp b/Source/WebCore/animation/KeyframeEffect.cpp
>index 3f1356f5f3d577d1bdb4316ccae6db0546beb9b5..f6607511a3617405dcdcab35b52a93ffe15699d5 100644
>--- a/Source/WebCore/animation/KeyframeEffect.cpp
>+++ b/Source/WebCore/animation/KeyframeEffect.cpp
>@@ -607,7 +607,7 @@ Vector<Strong<JSObject>> KeyframeEffect::getKeyframes(ExecState& state)
> auto value = toJS<IDLDOMString>(state, idlValue);
> // 4. Call the [[DefineOwnProperty]] internal method on output keyframe with property name property name,
> // Property Descriptor { [[Writable]]: true, [[Enumerable]]: true, [[Configurable]]: true, [[Value]]: value } and Boolean flag false.
>- JSObject::defineOwnProperty(outputKeyframe, &state, AtomicString(propertyName).impl(), PropertyDescriptor(value, 0), false);
>+ JSObject::defineOwnProperty(outputKeyframe, &state, AtomString(propertyName).impl(), PropertyDescriptor(value, 0), false);
> }
> 
> // 5. Append output keyframe to result.
>@@ -645,7 +645,7 @@ Vector<Strong<JSObject>> KeyframeEffect::getKeyframes(ExecState& state)
> auto value = toJS<IDLDOMString>(state, it->value);
> // 4. Call the [[DefineOwnProperty]] internal method on output keyframe with property name property name,
> // Property Descriptor { [[Writable]]: true, [[Enumerable]]: true, [[Configurable]]: true, [[Value]]: value } and Boolean flag false.
>- JSObject::defineOwnProperty(outputKeyframe, &state, AtomicString(propertyName).impl(), PropertyDescriptor(value, 0), false);
>+ JSObject::defineOwnProperty(outputKeyframe, &state, AtomString(propertyName).impl(), PropertyDescriptor(value, 0), false);
> }
> 
> // 4. Append output keyframe to result.
>diff --git a/Source/WebCore/animation/WebAnimation.cpp b/Source/WebCore/animation/WebAnimation.cpp
>index b9e646a2e48b40a867d4461b47350659384c9c0c..edfdbb0a06fd6eda25048b9719b9ef1ba9e13443 100644
>--- a/Source/WebCore/animation/WebAnimation.cpp
>+++ b/Source/WebCore/animation/WebAnimation.cpp
>@@ -598,7 +598,7 @@ void WebAnimation::cancel(Silently silently)
> invalidateEffect();
> }
> 
>-void WebAnimation::enqueueAnimationPlaybackEvent(const AtomicString& type, Optional<Seconds> currentTime, Optional<Seconds> timelineTime)
>+void WebAnimation::enqueueAnimationPlaybackEvent(const AtomString& type, Optional<Seconds> currentTime, Optional<Seconds> timelineTime)
> {
> auto event = AnimationPlaybackEvent::create(type, currentTime, timelineTime);
> event->setTarget(this);
>diff --git a/Source/WebCore/animation/WebAnimation.h b/Source/WebCore/animation/WebAnimation.h
>index e4b38b43b3157ccf7799c4b3bda22e8bc467ad6f..a4fa9d1f9ec8a86741c8ec693596441e9c5c082e 100644
>--- a/Source/WebCore/animation/WebAnimation.h
>+++ b/Source/WebCore/animation/WebAnimation.h
>@@ -137,7 +137,7 @@ private:
> 
> void timingDidChange(DidSeek, SynchronouslyNotify);
> void updateFinishedState(DidSeek, SynchronouslyNotify);
>- void enqueueAnimationPlaybackEvent(const AtomicString&, Optional<Seconds>, Optional<Seconds>);
>+ void enqueueAnimationPlaybackEvent(const AtomString&, Optional<Seconds>, Optional<Seconds>);
> Seconds effectEndTime() const;
> WebAnimation& readyPromiseResolve();
> WebAnimation& finishedPromiseResolve();
>diff --git a/Source/WebCore/bindings/IDLTypes.h b/Source/WebCore/bindings/IDLTypes.h
>index 18a3c10e3bf0c4735c9901902d5acddff3f4f638..750ea8dfc6d601a23c7ca040c3b38a5b07e413d8 100644
>--- a/Source/WebCore/bindings/IDLTypes.h
>+++ b/Source/WebCore/bindings/IDLTypes.h
>@@ -141,11 +141,11 @@ template<typename T> struct IDLTreatNullAsEmptyAdaptor : IDLString<String> {
> using InnerType = T;
> };
> 
>-template<typename T> struct IDLAtomicStringAdaptor : IDLString<AtomicString> {
>+template<typename T> struct IDLAtomStringAdaptor : IDLString<AtomString> {
> using InnerType = T;
> };
> 
>-template<typename T> struct IDLRequiresExistingAtomicStringAdaptor : IDLString<AtomicString> {
>+template<typename T> struct IDLRequiresExistingAtomStringAdaptor : IDLString<AtomString> {
> using InnerType = T;
> };
> 
>diff --git a/Source/WebCore/bindings/js/CachedScriptFetcher.h b/Source/WebCore/bindings/js/CachedScriptFetcher.h
>index d5391c697d7cf4f6f5d4079ca272ef77ea9caba7..382314252ca6e4d9320271a168e82de009c982d4 100644
>--- a/Source/WebCore/bindings/js/CachedScriptFetcher.h
>+++ b/Source/WebCore/bindings/js/CachedScriptFetcher.h
>@@ -41,7 +41,7 @@ public:
> static Ref<CachedScriptFetcher> create(const String& charset);
> 
> protected:
>- CachedScriptFetcher(const String& nonce, const String& charset, const AtomicString& initiatorName, bool isInUserAgentShadowTree)
>+ CachedScriptFetcher(const String& nonce, const String& charset, const AtomString& initiatorName, bool isInUserAgentShadowTree)
> : m_nonce(nonce)
> , m_charset(charset)
> , m_initiatorName(initiatorName)
>@@ -59,7 +59,7 @@ protected:
> private:
> String m_nonce;
> String m_charset;
>- AtomicString m_initiatorName;
>+ AtomString m_initiatorName;
> bool m_isInUserAgentShadowTree { false };
> };
> 
>diff --git a/Source/WebCore/bindings/js/CommonVM.cpp b/Source/WebCore/bindings/js/CommonVM.cpp
>index 9220f0b16079da06089b77e335301adc7efdae1b..c1e94b8b85726b3d51fe11958992351bf37e1b52 100644
>--- a/Source/WebCore/bindings/js/CommonVM.cpp
>+++ b/Source/WebCore/bindings/js/CommonVM.cpp
>@@ -35,7 +35,7 @@
> #include <JavaScriptCore/MachineStackMarker.h>
> #include <JavaScriptCore/VM.h>
> #include <wtf/MainThread.h>
>-#include <wtf/text/AtomicString.h>
>+#include <wtf/text/AtomString.h>
> 
> #if PLATFORM(IOS_FAMILY)
> #include "WebCoreThreadInternal.h"
>@@ -83,7 +83,7 @@ Frame* lexicalFrameFromCommonVM()
> return nullptr;
> }
> 
>-void addImpureProperty(const AtomicString& propertyName)
>+void addImpureProperty(const AtomString& propertyName)
> {
> commonVM().addImpureProperty(propertyName);
> }
>diff --git a/Source/WebCore/bindings/js/CommonVM.h b/Source/WebCore/bindings/js/CommonVM.h
>index 2821eb2888e85a3033f6ded2e122d18c9326e5d9..291162dfc16fb398baaeee23cacfd56793b7be9f 100644
>--- a/Source/WebCore/bindings/js/CommonVM.h
>+++ b/Source/WebCore/bindings/js/CommonVM.h
>@@ -52,7 +52,7 @@ inline JSC::VM& commonVM()
> return commonVMSlow();
> }
> 
>-void addImpureProperty(const AtomicString&);
>+void addImpureProperty(const AtomString&);
> 
> } // namespace WebCore
> 
>diff --git a/Source/WebCore/bindings/js/JSCustomElementInterface.cpp b/Source/WebCore/bindings/js/JSCustomElementInterface.cpp
>index 9ff543feb97d6f596bed2cf10b72b902938f6b99..0184a7d4f395ca0c540d48d4e6db5005ec0a025e 100644
>--- a/Source/WebCore/bindings/js/JSCustomElementInterface.cpp
>+++ b/Source/WebCore/bindings/js/JSCustomElementInterface.cpp
>@@ -55,9 +55,9 @@ JSCustomElementInterface::JSCustomElementInterface(const QualifiedName& name, JS
> 
> JSCustomElementInterface::~JSCustomElementInterface() = default;
> 
>-static RefPtr<Element> constructCustomElementSynchronously(Document&, VM&, ExecState&, JSObject* constructor, const AtomicString& localName);
>+static RefPtr<Element> constructCustomElementSynchronously(Document&, VM&, ExecState&, JSObject* constructor, const AtomString& localName);
> 
>-Ref<Element> JSCustomElementInterface::constructElementWithFallback(Document& document, const AtomicString& localName)
>+Ref<Element> JSCustomElementInterface::constructElementWithFallback(Document& document, const AtomString& localName)
> {
> if (auto element = tryToConstructCustomElement(document, localName))
> return element.releaseNonNull();
>@@ -84,7 +84,7 @@ Ref<Element> JSCustomElementInterface::constructElementWithFallback(Document& do
> return element;
> }
> 
>-RefPtr<Element> JSCustomElementInterface::tryToConstructCustomElement(Document& document, const AtomicString& localName)
>+RefPtr<Element> JSCustomElementInterface::tryToConstructCustomElement(Document& document, const AtomString& localName)
> {
> if (!canInvokeCallback())
> return nullptr;
>@@ -114,7 +114,7 @@ RefPtr<Element> JSCustomElementInterface::tryToConstructCustomElement(Document&
> 
> // https://dom.spec.whatwg.org/#concept-create-element
> // 6. 1. If the synchronous custom elements flag is set
>-static RefPtr<Element> constructCustomElementSynchronously(Document& document, VM& vm, ExecState& state, JSObject* constructor, const AtomicString& localName)
>+static RefPtr<Element> constructCustomElementSynchronously(Document& document, VM& vm, ExecState& state, JSObject* constructor, const AtomString& localName)
> {
> auto scope = DECLARE_THROW_SCOPE(vm);
> ConstructData constructData;
>@@ -300,7 +300,7 @@ void JSCustomElementInterface::setAttributeChangedCallback(JSC::JSObject* callba
> m_observedAttributes.add(name);
> }
> 
>-void JSCustomElementInterface::invokeAttributeChangedCallback(Element& element, const QualifiedName& attributeName, const AtomicString& oldValue, const AtomicString& newValue)
>+void JSCustomElementInterface::invokeAttributeChangedCallback(Element& element, const QualifiedName& attributeName, const AtomString& oldValue, const AtomString& newValue)
> {
> invokeCallback(element, m_attributeChangedCallback.get(), [&](ExecState* state, JSDOMGlobalObject*, MarkedArgumentBuffer& args) {
> args.append(toJS<IDLDOMString>(*state, attributeName.localName()));
>diff --git a/Source/WebCore/bindings/js/JSCustomElementInterface.h b/Source/WebCore/bindings/js/JSCustomElementInterface.h
>index d18cabdab0ac76e1deaa84a876c487b31920fea8..46b8154dc33b791b17806984a78df2c29393b2f0 100644
>--- a/Source/WebCore/bindings/js/JSCustomElementInterface.h
>+++ b/Source/WebCore/bindings/js/JSCustomElementInterface.h
>@@ -34,7 +34,7 @@
> #include <wtf/Forward.h>
> #include <wtf/Function.h>
> #include <wtf/RefCounted.h>
>-#include <wtf/text/AtomicStringHash.h>
>+#include <wtf/text/AtomStringHash.h>
> 
> namespace JSC {
> class JSObject;
>@@ -57,7 +57,7 @@ public:
> return adoptRef(*new JSCustomElementInterface(name, callback, globalObject));
> }
> 
>- Ref<Element> constructElementWithFallback(Document&, const AtomicString&);
>+ Ref<Element> constructElementWithFallback(Document&, const AtomString&);
> Ref<Element> constructElementWithFallback(Document&, const QualifiedName&);
> 
> void upgradeElement(Element&);
>@@ -75,8 +75,8 @@ public:
> void invokeAdoptedCallback(Element&, Document& oldDocument, Document& newDocument);
> 
> void setAttributeChangedCallback(JSC::JSObject* callback, const Vector<String>& observedAttributes);
>- bool observesAttribute(const AtomicString& name) const { return m_observedAttributes.contains(name); }
>- void invokeAttributeChangedCallback(Element&, const QualifiedName&, const AtomicString& oldValue, const AtomicString& newValue);
>+ bool observesAttribute(const AtomString& name) const { return m_observedAttributes.contains(name); }
>+ void invokeAttributeChangedCallback(Element&, const QualifiedName&, const AtomString& oldValue, const AtomString& newValue);
> 
> ScriptExecutionContext* scriptExecutionContext() const { return ContextDestructionObserver::scriptExecutionContext(); }
> JSC::JSObject* constructor() { return m_constructor.get(); }
>@@ -92,7 +92,7 @@ public:
> private:
> JSCustomElementInterface(const QualifiedName&, JSC::JSObject* callback, JSDOMGlobalObject*);
> 
>- RefPtr<Element> tryToConstructCustomElement(Document&, const AtomicString&);
>+ RefPtr<Element> tryToConstructCustomElement(Document&, const AtomString&);
> 
> void invokeCallback(Element&, JSC::JSObject* callback, const WTF::Function<void(JSC::ExecState*, JSDOMGlobalObject*, JSC::MarkedArgumentBuffer&)>& addArguments = [](JSC::ExecState*, JSDOMGlobalObject*, JSC::MarkedArgumentBuffer&) { });
> 
>@@ -104,7 +104,7 @@ private:
> JSC::Weak<JSC::JSObject> m_attributeChangedCallback;
> Ref<DOMWrapperWorld> m_isolatedWorld;
> Vector<RefPtr<Element>, 1> m_constructionStack;
>- HashSet<AtomicString> m_observedAttributes;
>+ HashSet<AtomString> m_observedAttributes;
> };
> 
> } // namespace WebCore
>diff --git a/Source/WebCore/bindings/js/JSCustomElementRegistryCustom.cpp b/Source/WebCore/bindings/js/JSCustomElementRegistryCustom.cpp
>index 41597cd4880185f386d74149279a7057c960a02f..98dbc2b67c4ada6c3c8f1fca87b24b654d9c3380 100644
>--- a/Source/WebCore/bindings/js/JSCustomElementRegistryCustom.cpp
>+++ b/Source/WebCore/bindings/js/JSCustomElementRegistryCustom.cpp
>@@ -56,7 +56,7 @@ static JSObject* getCustomElementCallback(ExecState& state, JSObject& prototype,
> return callback.getObject();
> }
> 
>-static bool validateCustomElementNameAndThrowIfNeeded(ExecState& state, const AtomicString& name)
>+static bool validateCustomElementNameAndThrowIfNeeded(ExecState& state, const AtomString& name)
> {
> auto scope = DECLARE_THROW_SCOPE(state.vm());
> switch (Document::validateCustomElementName(name)) {
>@@ -91,7 +91,7 @@ JSValue JSCustomElementRegistry::define(ExecState& state)
> if (UNLIKELY(state.argumentCount() < 2))
> return throwException(&state, scope, createNotEnoughArgumentsError(&state));
> 
>- AtomicString localName(state.uncheckedArgument(0).toString(&state)->toAtomicString(&state));
>+ AtomString localName(state.uncheckedArgument(0).toString(&state)->toAtomString(&state));
> RETURN_IF_EXCEPTION(scope, JSValue());
> 
> JSValue constructorValue = state.uncheckedArgument(1);
>@@ -182,7 +182,7 @@ static JSValue whenDefinedPromise(ExecState& state, JSDOMGlobalObject& globalObj
> if (UNLIKELY(state.argumentCount() < 1))
> return throwException(&state, scope, createNotEnoughArgumentsError(&state));
> 
>- AtomicString localName(state.uncheckedArgument(0).toString(&state)->toAtomicString(&state));
>+ AtomString localName(state.uncheckedArgument(0).toString(&state)->toAtomString(&state));
> RETURN_IF_EXCEPTION(scope, JSValue());
> 
> if (!validateCustomElementNameAndThrowIfNeeded(state, localName)) {
>diff --git a/Source/WebCore/bindings/js/JSDOMConvertStrings.h b/Source/WebCore/bindings/js/JSDOMConvertStrings.h
>index dc89cbf14595a72e8f9df2ea240ed85dbe7b471f..d8d0be11e6e1153c4a1d869e1ab11346623c52b1 100644
>--- a/Source/WebCore/bindings/js/JSDOMConvertStrings.h
>+++ b/Source/WebCore/bindings/js/JSDOMConvertStrings.h
>@@ -42,9 +42,9 @@ inline String propertyNameToString(JSC::PropertyName propertyName)
> return propertyName.uid() ? propertyName.uid() : propertyName.publicName();
> }
> 
>-inline AtomicString propertyNameToAtomicString(JSC::PropertyName propertyName)
>+inline AtomString propertyNameToAtomString(JSC::PropertyName propertyName)
> {
>- return AtomicString(propertyName.uid() ? propertyName.uid() : propertyName.publicName());
>+ return AtomString(propertyName.uid() ? propertyName.uid() : propertyName.publicName());
> }
> 
> // MARK: -
>@@ -153,20 +153,20 @@ template<typename T> struct JSConverter<IDLTreatNullAsEmptyAdaptor<T>> {
> }
> };
> 
>-template<typename T> struct Converter<IDLAtomicStringAdaptor<T>> : DefaultConverter<IDLAtomicStringAdaptor<T>> {
>- static AtomicString convert(JSC::ExecState& state, JSC::JSValue value)
>+template<typename T> struct Converter<IDLAtomStringAdaptor<T>> : DefaultConverter<IDLAtomStringAdaptor<T>> {
>+ static AtomString convert(JSC::ExecState& state, JSC::JSValue value)
> {
> static_assert(std::is_same<T, IDLDOMString>::value, "This adaptor is only supported for IDLDOMString at the moment.");
> 
>- return value.toString(&state)->toAtomicString(&state);
>+ return value.toString(&state)->toAtomString(&state);
> }
> };
> 
>-template<typename T> struct JSConverter<IDLAtomicStringAdaptor<T>> {
>+template<typename T> struct JSConverter<IDLAtomStringAdaptor<T>> {
> static constexpr bool needsState = true;
> static constexpr bool needsGlobalObject = false;
> 
>- static JSC::JSValue convert(JSC::ExecState& state, const AtomicString& value)
>+ static JSC::JSValue convert(JSC::ExecState& state, const AtomString& value)
> {
> static_assert(std::is_same<T, IDLDOMString>::value, "This adaptor is only supported for IDLDOMString at the moment.");
> 
>@@ -174,20 +174,20 @@ template<typename T> struct JSConverter<IDLAtomicStringAdaptor<T>> {
> }
> };
> 
>-template<typename T> struct Converter<IDLRequiresExistingAtomicStringAdaptor<T>> : DefaultConverter<IDLRequiresExistingAtomicStringAdaptor<T>> {
>- static AtomicString convert(JSC::ExecState& state, JSC::JSValue value)
>+template<typename T> struct Converter<IDLRequiresExistingAtomStringAdaptor<T>> : DefaultConverter<IDLRequiresExistingAtomStringAdaptor<T>> {
>+ static AtomString convert(JSC::ExecState& state, JSC::JSValue value)
> {
> static_assert(std::is_same<T, IDLDOMString>::value, "This adaptor is only supported for IDLDOMString at the moment.");
> 
>- return AtomicString(value.toString(&state)->toExistingAtomicString(&state));
>+ return AtomString(value.toString(&state)->toExistingAtomString(&state));
> }
> };
> 
>-template<typename T> struct JSConverter<IDLRequiresExistingAtomicStringAdaptor<T>> {
>+template<typename T> struct JSConverter<IDLRequiresExistingAtomStringAdaptor<T>> {
> static constexpr bool needsState = true;
> static constexpr bool needsGlobalObject = false;
> 
>- static JSC::JSValue convert(JSC::ExecState& state, const AtomicString& value)
>+ static JSC::JSValue convert(JSC::ExecState& state, const AtomString& value)
> {
> static_assert(std::is_same<T, IDLDOMString>::value, "This adaptor is only supported for IDLDOMString at the moment.");
> 
>diff --git a/Source/WebCore/bindings/js/JSDOMWindowCustom.cpp b/Source/WebCore/bindings/js/JSDOMWindowCustom.cpp
>index a5f0619fecf912bcccc208ceb51f5dcb9eccf652..d10310ab6c89aa2a4b9a4a7017767d500cd4868f 100644
>--- a/Source/WebCore/bindings/js/JSDOMWindowCustom.cpp
>+++ b/Source/WebCore/bindings/js/JSDOMWindowCustom.cpp
>@@ -148,7 +148,7 @@ bool jsDOMWindowGetOwnPropertySlotRestrictedAccess(JSDOMGlobalObject* thisObject
> // FIXME: Add support to named attributes on RemoteFrames.
> auto* frame = window.frame();
> if (frame && is<Frame>(*frame)) {
>- if (auto* scopedChild = downcast<Frame>(*frame).tree().scopedChild(propertyNameToAtomicString(propertyName))) {
>+ if (auto* scopedChild = downcast<Frame>(*frame).tree().scopedChild(propertyNameToAtomString(propertyName))) {
> slot.setValue(thisObject, JSC::PropertyAttribute::ReadOnly | JSC::PropertyAttribute::DontDelete | JSC::PropertyAttribute::DontEnum, toJS(&state, scopedChild->document()->domWindow()));
> return true;
> }
>diff --git a/Source/WebCore/bindings/js/JSDOMWindowProperties.cpp b/Source/WebCore/bindings/js/JSDOMWindowProperties.cpp
>index 308ca0e94d8a0fc1b07f5e941656ff1e63a04500..9ca9ed756d2a42ba8e6a0b6dbd5a8b20d3b4fa0a 100644
>--- a/Source/WebCore/bindings/js/JSDOMWindowProperties.cpp
>+++ b/Source/WebCore/bindings/js/JSDOMWindowProperties.cpp
>@@ -48,7 +48,7 @@ static bool jsDOMWindowPropertiesGetOwnPropertySlotNamedItemGetter(JSDOMWindowPr
> // properties that are in Moz but not IE. Since we have some of these, we have to do it
> // the Moz way.
> if (auto* frame = window.frame()) {
>- if (auto* scopedChild = frame->tree().scopedChild(propertyNameToAtomicString(propertyName))) {
>+ if (auto* scopedChild = frame->tree().scopedChild(propertyNameToAtomString(propertyName))) {
> slot.setValue(thisObject, JSC::PropertyAttribute::ReadOnly | JSC::PropertyAttribute::DontDelete | JSC::PropertyAttribute::DontEnum, toJS(exec, scopedChild->document()->domWindow()));
> return true;
> }
>diff --git a/Source/WebCore/bindings/js/JSEventCustom.cpp b/Source/WebCore/bindings/js/JSEventCustom.cpp
>index 87199eb9207a632b4e4ba53519f5852dca1c6652..136196b5e251f628254965c2dd5fde67bb5ddbcc 100644
>--- a/Source/WebCore/bindings/js/JSEventCustom.cpp
>+++ b/Source/WebCore/bindings/js/JSEventCustom.cpp
>@@ -36,7 +36,7 @@
> #include "JSDOMBinding.h"
> #include "JSDataTransfer.h"
> #include <JavaScriptCore/JSLock.h>
>-#include <wtf/text/AtomicString.h>
>+#include <wtf/text/AtomString.h>
> 
> 
> namespace WebCore {
>diff --git a/Source/WebCore/bindings/js/JSEventListener.cpp b/Source/WebCore/bindings/js/JSEventListener.cpp
>index 571e7c7514f8689b540c7de9a86d18d8bcf244f5..7bd98c6c84fa7a408f4cf5360b893ef90eb8714d 100644
>--- a/Source/WebCore/bindings/js/JSEventListener.cpp
>+++ b/Source/WebCore/bindings/js/JSEventListener.cpp
>@@ -236,45 +236,45 @@ static inline RefPtr<JSEventListener> createEventListenerForEventHandlerAttribut
> return JSEventListener::create(asObject(listener), &wrapper, true, currentWorld(state));
> }
> 
>-JSC::JSValue eventHandlerAttribute(EventTarget& target, const AtomicString& eventType, DOMWrapperWorld& isolatedWorld)
>+JSC::JSValue eventHandlerAttribute(EventTarget& target, const AtomString& eventType, DOMWrapperWorld& isolatedWorld)
> {
> return eventHandlerAttribute(target.attributeEventListener(eventType, isolatedWorld), *target.scriptExecutionContext());
> }
> 
>-void setEventHandlerAttribute(JSC::ExecState& state, JSC::JSObject& wrapper, EventTarget& target, const AtomicString& eventType, JSC::JSValue value)
>+void setEventHandlerAttribute(JSC::ExecState& state, JSC::JSObject& wrapper, EventTarget& target, const AtomString& eventType, JSC::JSValue value)
> {
> target.setAttributeEventListener(eventType, createEventListenerForEventHandlerAttribute(state, value, wrapper), currentWorld(state));
> }
> 
>-JSC::JSValue windowEventHandlerAttribute(HTMLElement& element, const AtomicString& eventType, DOMWrapperWorld& isolatedWorld)
>+JSC::JSValue windowEventHandlerAttribute(HTMLElement& element, const AtomString& eventType, DOMWrapperWorld& isolatedWorld)
> {
> auto& document = element.document();
> return eventHandlerAttribute(document.getWindowAttributeEventListener(eventType, isolatedWorld), document);
> }
> 
>-void setWindowEventHandlerAttribute(JSC::ExecState& state, JSC::JSObject& wrapper, HTMLElement& element, const AtomicString& eventType, JSC::JSValue value)
>+void setWindowEventHandlerAttribute(JSC::ExecState& state, JSC::JSObject& wrapper, HTMLElement& element, const AtomString& eventType, JSC::JSValue value)
> {
> ASSERT(wrapper.globalObject());
> element.document().setWindowAttributeEventListener(eventType, createEventListenerForEventHandlerAttribute(state, value, *wrapper.globalObject()), currentWorld(state));
> }
> 
>-JSC::JSValue windowEventHandlerAttribute(DOMWindow& window, const AtomicString& eventType, DOMWrapperWorld& isolatedWorld)
>+JSC::JSValue windowEventHandlerAttribute(DOMWindow& window, const AtomString& eventType, DOMWrapperWorld& isolatedWorld)
> {
> return eventHandlerAttribute(window, eventType, isolatedWorld);
> }
> 
>-void setWindowEventHandlerAttribute(JSC::ExecState& state, JSC::JSObject& wrapper, DOMWindow& window, const AtomicString& eventType, JSC::JSValue value)
>+void setWindowEventHandlerAttribute(JSC::ExecState& state, JSC::JSObject& wrapper, DOMWindow& window, const AtomString& eventType, JSC::JSValue value)
> {
> setEventHandlerAttribute(state, wrapper, window, eventType, value);
> }
> 
>-JSC::JSValue documentEventHandlerAttribute(HTMLElement& element, const AtomicString& eventType, DOMWrapperWorld& isolatedWorld)
>+JSC::JSValue documentEventHandlerAttribute(HTMLElement& element, const AtomString& eventType, DOMWrapperWorld& isolatedWorld)
> {
> auto& document = element.document();
> return eventHandlerAttribute(document.attributeEventListener(eventType, isolatedWorld), document);
> }
> 
>-void setDocumentEventHandlerAttribute(JSC::ExecState& state, JSC::JSObject& wrapper, HTMLElement& element, const AtomicString& eventType, JSC::JSValue value)
>+void setDocumentEventHandlerAttribute(JSC::ExecState& state, JSC::JSObject& wrapper, HTMLElement& element, const AtomString& eventType, JSC::JSValue value)
> {
> ASSERT(wrapper.globalObject());
> auto& document = element.document();
>@@ -283,12 +283,12 @@ void setDocumentEventHandlerAttribute(JSC::ExecState& state, JSC::JSObject& wrap
> document.setAttributeEventListener(eventType, createEventListenerForEventHandlerAttribute(state, value, *documentWrapper), currentWorld(state));
> }
> 
>-JSC::JSValue documentEventHandlerAttribute(Document& document, const AtomicString& eventType, DOMWrapperWorld& isolatedWorld)
>+JSC::JSValue documentEventHandlerAttribute(Document& document, const AtomString& eventType, DOMWrapperWorld& isolatedWorld)
> {
> return eventHandlerAttribute(document, eventType, isolatedWorld);
> }
> 
>-void setDocumentEventHandlerAttribute(JSC::ExecState& state, JSC::JSObject& wrapper, Document& document, const AtomicString& eventType, JSC::JSValue value)
>+void setDocumentEventHandlerAttribute(JSC::ExecState& state, JSC::JSObject& wrapper, Document& document, const AtomString& eventType, JSC::JSValue value)
> {
> setEventHandlerAttribute(state, wrapper, document, eventType, value);
> }
>diff --git a/Source/WebCore/bindings/js/JSEventListener.h b/Source/WebCore/bindings/js/JSEventListener.h
>index cb8880baee309f03e419ba70326859cf06225f60..c4668bf3da3b86821927ecf35cb7ebc31821227f 100644
>--- a/Source/WebCore/bindings/js/JSEventListener.h
>+++ b/Source/WebCore/bindings/js/JSEventListener.h
>@@ -74,20 +74,20 @@ private:
> };
> 
> // For "onxxx" attributes that automatically set up JavaScript event listeners.
>-JSC::JSValue eventHandlerAttribute(EventTarget&, const AtomicString& eventType, DOMWrapperWorld&);
>-void setEventHandlerAttribute(JSC::ExecState&, JSC::JSObject&, EventTarget&, const AtomicString& eventType, JSC::JSValue);
>+JSC::JSValue eventHandlerAttribute(EventTarget&, const AtomString& eventType, DOMWrapperWorld&);
>+void setEventHandlerAttribute(JSC::ExecState&, JSC::JSObject&, EventTarget&, const AtomString& eventType, JSC::JSValue);
> 
> // Like the functions above, but for attributes that forward event handlers to the window object rather than setting them on the target.
>-JSC::JSValue windowEventHandlerAttribute(HTMLElement&, const AtomicString& eventType, DOMWrapperWorld&);
>-void setWindowEventHandlerAttribute(JSC::ExecState&, JSC::JSObject&, HTMLElement&, const AtomicString& eventType, JSC::JSValue);
>-JSC::JSValue windowEventHandlerAttribute(DOMWindow&, const AtomicString& eventType, DOMWrapperWorld&);
>-void setWindowEventHandlerAttribute(JSC::ExecState&, JSC::JSObject&, DOMWindow&, const AtomicString& eventType, JSC::JSValue);
>+JSC::JSValue windowEventHandlerAttribute(HTMLElement&, const AtomString& eventType, DOMWrapperWorld&);
>+void setWindowEventHandlerAttribute(JSC::ExecState&, JSC::JSObject&, HTMLElement&, const AtomString& eventType, JSC::JSValue);
>+JSC::JSValue windowEventHandlerAttribute(DOMWindow&, const AtomString& eventType, DOMWrapperWorld&);
>+void setWindowEventHandlerAttribute(JSC::ExecState&, JSC::JSObject&, DOMWindow&, const AtomString& eventType, JSC::JSValue);
> 
> // Like the functions above, but for attributes that forward event handlers to the document rather than setting them on the target.
>-JSC::JSValue documentEventHandlerAttribute(HTMLElement&, const AtomicString& eventType, DOMWrapperWorld&);
>-void setDocumentEventHandlerAttribute(JSC::ExecState&, JSC::JSObject&, HTMLElement&, const AtomicString& eventType, JSC::JSValue);
>-JSC::JSValue documentEventHandlerAttribute(Document&, const AtomicString& eventType, DOMWrapperWorld&);
>-void setDocumentEventHandlerAttribute(JSC::ExecState&, JSC::JSObject&, Document&, const AtomicString& eventType, JSC::JSValue);
>+JSC::JSValue documentEventHandlerAttribute(HTMLElement&, const AtomString& eventType, DOMWrapperWorld&);
>+void setDocumentEventHandlerAttribute(JSC::ExecState&, JSC::JSObject&, HTMLElement&, const AtomString& eventType, JSC::JSValue);
>+JSC::JSValue documentEventHandlerAttribute(Document&, const AtomString& eventType, DOMWrapperWorld&);
>+void setDocumentEventHandlerAttribute(JSC::ExecState&, JSC::JSObject&, Document&, const AtomString& eventType, JSC::JSValue);
> 
> inline JSC::JSObject* JSEventListener::jsFunction(ScriptExecutionContext& scriptExecutionContext) const
> {
>diff --git a/Source/WebCore/bindings/js/JSLazyEventListener.cpp b/Source/WebCore/bindings/js/JSLazyEventListener.cpp
>index bfe62c4583ee57d08ac6bddf217df716802cbe9e..2d74f29e26a541517baada3d6d721cad01fdfe57 100644
>--- a/Source/WebCore/bindings/js/JSLazyEventListener.cpp
>+++ b/Source/WebCore/bindings/js/JSLazyEventListener.cpp
>@@ -42,7 +42,7 @@ DEFINE_DEBUG_ONLY_GLOBAL(WTF::RefCountedLeakCounter, eventListenerCounter, ("JSL
> 
> struct JSLazyEventListener::CreationArguments {
> const QualifiedName& attributeName;
>- const AtomicString& attributeValue;
>+ const AtomString& attributeValue;
> Document& document;
> WeakPtr<ContainerNode> node;
> JSObject* wrapper;
>@@ -184,19 +184,19 @@ RefPtr<JSLazyEventListener> JSLazyEventListener::create(CreationArguments&& argu
> return adoptRef(*new JSLazyEventListener(WTFMove(arguments), sourceURL, position));
> }
> 
>-RefPtr<JSLazyEventListener> JSLazyEventListener::create(Element& element, const QualifiedName& attributeName, const AtomicString& attributeValue)
>+RefPtr<JSLazyEventListener> JSLazyEventListener::create(Element& element, const QualifiedName& attributeName, const AtomString& attributeValue)
> {
> return create({ attributeName, attributeValue, element.document(), makeWeakPtr(element), nullptr, element.isSVGElement() });
> }
> 
>-RefPtr<JSLazyEventListener> JSLazyEventListener::create(Document& document, const QualifiedName& attributeName, const AtomicString& attributeValue)
>+RefPtr<JSLazyEventListener> JSLazyEventListener::create(Document& document, const QualifiedName& attributeName, const AtomString& attributeValue)
> {
> // FIXME: This always passes false for "shouldUseSVGEventName". Is that correct for events dispatched to SVG documents?
> // This has been this way for a long time, but became more obvious when refactoring to separate the Element and Document code paths.
> return create({ attributeName, attributeValue, document, makeWeakPtr(document), nullptr, false });
> }
> 
>-RefPtr<JSLazyEventListener> JSLazyEventListener::create(DOMWindow& window, const QualifiedName& attributeName, const AtomicString& attributeValue)
>+RefPtr<JSLazyEventListener> JSLazyEventListener::create(DOMWindow& window, const QualifiedName& attributeName, const AtomString& attributeValue)
> {
> ASSERT(window.document());
> auto& document = *window.document();
>diff --git a/Source/WebCore/bindings/js/JSLazyEventListener.h b/Source/WebCore/bindings/js/JSLazyEventListener.h
>index f473f44d059d61d72fb225a7f97cf58ddbce30ab..7ab8716fa3f4e5c1ae36a247a2a6b9b129a9276f 100644
>--- a/Source/WebCore/bindings/js/JSLazyEventListener.h
>+++ b/Source/WebCore/bindings/js/JSLazyEventListener.h
>@@ -33,9 +33,9 @@ class QualifiedName;
> 
> class JSLazyEventListener final : public JSEventListener {
> public:
>- static RefPtr<JSLazyEventListener> create(Element&, const QualifiedName& attributeName, const AtomicString& attributeValue);
>- static RefPtr<JSLazyEventListener> create(Document&, const QualifiedName& attributeName, const AtomicString& attributeValue);
>- static RefPtr<JSLazyEventListener> create(DOMWindow&, const QualifiedName& attributeName, const AtomicString& attributeValue);
>+ static RefPtr<JSLazyEventListener> create(Element&, const QualifiedName& attributeName, const AtomString& attributeValue);
>+ static RefPtr<JSLazyEventListener> create(Document&, const QualifiedName& attributeName, const AtomString& attributeValue);
>+ static RefPtr<JSLazyEventListener> create(DOMWindow&, const QualifiedName& attributeName, const AtomString& attributeValue);
> 
> virtual ~JSLazyEventListener();
> 
>diff --git a/Source/WebCore/bindings/js/JSNodeListCustom.cpp b/Source/WebCore/bindings/js/JSNodeListCustom.cpp
>index 7f6d9e72da50795fef35ffd62bd2688c5a10eaf2..609a13f598b7eddecb1964bd8527179354c5bc7b 100644
>--- a/Source/WebCore/bindings/js/JSNodeListCustom.cpp
>+++ b/Source/WebCore/bindings/js/JSNodeListCustom.cpp
>@@ -31,7 +31,7 @@
> #include "LiveNodeList.h"
> #include "Node.h"
> #include "NodeList.h"
>-#include <wtf/text/AtomicString.h>
>+#include <wtf/text/AtomString.h>
> 
> 
> namespace WebCore {
>diff --git a/Source/WebCore/bindings/js/ScriptController.h b/Source/WebCore/bindings/js/ScriptController.h
>index ecde7a0aa1803a4a7d90c14131468179d3601664..73611d0c21c691b83ecacb5520f9e9f17c235261 100644
>--- a/Source/WebCore/bindings/js/ScriptController.h
>+++ b/Source/WebCore/bindings/js/ScriptController.h
>@@ -133,8 +133,8 @@ public:
> 
> void updateDocument();
> 
>- void namedItemAdded(HTMLDocument*, const AtomicString&) { }
>- void namedItemRemoved(HTMLDocument*, const AtomicString&) { }
>+ void namedItemAdded(HTMLDocument*, const AtomString&) { }
>+ void namedItemRemoved(HTMLDocument*, const AtomString&) { }
> 
> void clearScriptObjects();
> WEBCORE_EXPORT void cleanupScriptObjectsForPlugin(void*);
>diff --git a/Source/WebCore/bindings/scripts/CodeGeneratorJS.pm b/Source/WebCore/bindings/scripts/CodeGeneratorJS.pm
>index 8d6208182302d551478ffb8c6d09656f7e470d40..35636c98da3c75b860d0fadace44812b11caa510 100644
>--- a/Source/WebCore/bindings/scripts/CodeGeneratorJS.pm
>+++ b/Source/WebCore/bindings/scripts/CodeGeneratorJS.pm
>@@ -600,7 +600,7 @@ sub GenerateNamedGetterLambda
> push(@$outputArray, " auto getterFunctor = [] (auto& thisObject, auto propertyName) -> ${returnType} {\n");
> 
> my @arguments = GenerateCallWithUsingReferences($namedGetterOperation->extendedAttributes->{CallWith}, $outputArray, "WTF::nullopt", "thisObject", " ");
>- push(@arguments, "propertyNameToAtomicString(propertyName)");
>+ push(@arguments, "propertyNameToAtomString(propertyName)");
> 
> push(@$outputArray, " auto result = thisObject.wrapped().${namedGetterFunctionName}(" . join(", ", @arguments) . ");\n");
> 
>@@ -2189,13 +2189,13 @@ sub GenerateDefaultValue
> my ($typeScope, $context, $type, $defaultValue) = @_;
> 
> if ($codeGenerator->IsStringType($type)) {
>- my $useAtomicString = $type->extendedAttributes->{AtomicString};
>+ my $useAtomString = $type->extendedAttributes->{AtomString};
> if ($defaultValue eq "null") {
>- return $useAtomicString ? "nullAtom()" : "String()";
>+ return $useAtomString ? "nullAtom()" : "String()";
> } elsif ($defaultValue eq "\"\"") {
>- return $useAtomicString ? "emptyAtom()" : "emptyString()";
>+ return $useAtomString ? "emptyAtom()" : "emptyString()";
> } else {
>- return $useAtomicString ? "AtomicString(${defaultValue}, AtomicString::ConstructFromLiteral)" : "${defaultValue}_s";
>+ return $useAtomString ? "AtomString(${defaultValue}, AtomString::ConstructFromLiteral)" : "${defaultValue}_s";
> }
> }
> 
>@@ -6468,8 +6468,8 @@ sub IsAnnotatedType
> return 1 if $type->extendedAttributes->{Clamp};
> return 1 if $type->extendedAttributes->{EnforceRange};
> return 1 if $type->extendedAttributes->{TreatNullAs} && $type->extendedAttributes->{TreatNullAs} eq "EmptyString";
>- return 1 if $type->extendedAttributes->{AtomicString};
>- return 1 if $type->extendedAttributes->{RequiresExistingAtomicString};
>+ return 1 if $type->extendedAttributes->{AtomString};
>+ return 1 if $type->extendedAttributes->{RequiresExistingAtomString};
> }
> 
> sub GetAnnotatedIDLType
>@@ -6479,8 +6479,8 @@ sub GetAnnotatedIDLType
> return "IDLClampAdaptor" if $type->extendedAttributes->{Clamp};
> return "IDLEnforceRangeAdaptor" if $type->extendedAttributes->{EnforceRange};
> return "IDLTreatNullAsEmptyAdaptor" if $type->extendedAttributes->{TreatNullAs} && $type->extendedAttributes->{TreatNullAs} eq "EmptyString";
>- return "IDLAtomicStringAdaptor" if $type->extendedAttributes->{AtomicString};
>- return "IDLRequiresExistingAtomicStringAdaptor" if $type->extendedAttributes->{RequiresExistingAtomicString};
>+ return "IDLAtomStringAdaptor" if $type->extendedAttributes->{AtomString};
>+ return "IDLRequiresExistingAtomStringAdaptor" if $type->extendedAttributes->{RequiresExistingAtomString};
> }
> 
> sub GetBaseIDLType
>diff --git a/Source/WebCore/bindings/scripts/IDLAttributes.json b/Source/WebCore/bindings/scripts/IDLAttributes.json
>index fc80906af915f6500207f9e2f7ead2678bb3a047..dd9519e2449147bec930c224301be291c9e3b05b 100644
>--- a/Source/WebCore/bindings/scripts/IDLAttributes.json
>+++ b/Source/WebCore/bindings/scripts/IDLAttributes.json
>@@ -22,7 +22,7 @@
> "AppleCopyright": {
> "contextsAllowed": ["interface", "attribute", "operation"]
> },
>- "AtomicString": {
>+ "AtomString": {
> "contextsAllowed": ["type"]
> },
> "CEReactions": {
>@@ -411,7 +411,7 @@
> "ReportExternalMemoryCost": {
> "contextsAllowed": ["interface"]
> },
>- "RequiresExistingAtomicString": {
>+ "RequiresExistingAtomString": {
> "contextsAllowed": ["type"]
> },
> "RethrowException": {
>diff --git a/Source/WebCore/bindings/scripts/test/JS/JSTestDOMJIT.cpp b/Source/WebCore/bindings/scripts/test/JS/JSTestDOMJIT.cpp
>index 83b0f7d9e4b5394c1dd40344a466e53d033dbee6..600437b06a32f2cbd6782766832fd7a225465d46 100644
>--- a/Source/WebCore/bindings/scripts/test/JS/JSTestDOMJIT.cpp
>+++ b/Source/WebCore/bindings/scripts/test/JS/JSTestDOMJIT.cpp
>@@ -61,9 +61,9 @@ JSC::EncodedJSValue JIT_OPERATION unsafeJsTestDOMJITPrototypeFunctionItem(JSC::E
> JSC::EncodedJSValue JSC_HOST_CALL jsTestDOMJITPrototypeFunctionHasAttribute(JSC::ExecState*);
> JSC::EncodedJSValue JIT_OPERATION unsafeJsTestDOMJITPrototypeFunctionHasAttribute(JSC::ExecState*, JSTestDOMJIT*);
> JSC::EncodedJSValue JSC_HOST_CALL jsTestDOMJITPrototypeFunctionGetElementById(JSC::ExecState*);
>-JSC::EncodedJSValue JIT_OPERATION unsafeJsTestDOMJITPrototypeFunctionGetElementById(JSC::ExecState*, JSTestDOMJIT*, DOMJIT::IDLJSArgumentType<IDLRequiresExistingAtomicStringAdaptor<IDLDOMString>>);
>+JSC::EncodedJSValue JIT_OPERATION unsafeJsTestDOMJITPrototypeFunctionGetElementById(JSC::ExecState*, JSTestDOMJIT*, DOMJIT::IDLJSArgumentType<IDLRequiresExistingAtomStringAdaptor<IDLDOMString>>);
> JSC::EncodedJSValue JSC_HOST_CALL jsTestDOMJITPrototypeFunctionGetElementsByName(JSC::ExecState*);
>-JSC::EncodedJSValue JIT_OPERATION unsafeJsTestDOMJITPrototypeFunctionGetElementsByName(JSC::ExecState*, JSTestDOMJIT*, DOMJIT::IDLJSArgumentType<IDLAtomicStringAdaptor<IDLDOMString>>);
>+JSC::EncodedJSValue JIT_OPERATION unsafeJsTestDOMJITPrototypeFunctionGetElementsByName(JSC::ExecState*, JSTestDOMJIT*, DOMJIT::IDLJSArgumentType<IDLAtomStringAdaptor<IDLDOMString>>);
> 
> // Attributes
> 
>@@ -111,9 +111,9 @@ static const JSC::DOMJIT::Signature DOMJITSignatureForTestDOMJITItem((uintptr_t)
> 
> static const JSC::DOMJIT::Signature DOMJITSignatureForTestDOMJITHasAttribute((uintptr_t)unsafeJsTestDOMJITPrototypeFunctionHasAttribute, JSTestDOMJIT::info(), JSC::DOMJIT::Effect::forRead(DOMJIT::AbstractHeapRepository::DOM), DOMJIT::IDLResultTypeFilter<IDLBoolean>::value);
> 
>-static const JSC::DOMJIT::Signature DOMJITSignatureForTestDOMJITGetElementById((uintptr_t)unsafeJsTestDOMJITPrototypeFunctionGetElementById, JSTestDOMJIT::info(), JSC::DOMJIT::Effect::forRead(DOMJIT::AbstractHeapRepository::DOM), DOMJIT::IDLResultTypeFilter<IDLInterface<Element>>::value, DOMJIT::IDLArgumentTypeFilter<IDLRequiresExistingAtomicStringAdaptor<IDLDOMString>>::value);
>+static const JSC::DOMJIT::Signature DOMJITSignatureForTestDOMJITGetElementById((uintptr_t)unsafeJsTestDOMJITPrototypeFunctionGetElementById, JSTestDOMJIT::info(), JSC::DOMJIT::Effect::forRead(DOMJIT::AbstractHeapRepository::DOM), DOMJIT::IDLResultTypeFilter<IDLInterface<Element>>::value, DOMJIT::IDLArgumentTypeFilter<IDLRequiresExistingAtomStringAdaptor<IDLDOMString>>::value);
> 
>-static const JSC::DOMJIT::Signature DOMJITSignatureForTestDOMJITGetElementsByName((uintptr_t)unsafeJsTestDOMJITPrototypeFunctionGetElementsByName, JSTestDOMJIT::info(), JSC::DOMJIT::Effect::forRead(DOMJIT::AbstractHeapRepository::DOM), DOMJIT::IDLResultTypeFilter<IDLInterface<NodeList>>::value, DOMJIT::IDLArgumentTypeFilter<IDLAtomicStringAdaptor<IDLDOMString>>::value);
>+static const JSC::DOMJIT::Signature DOMJITSignatureForTestDOMJITGetElementsByName((uintptr_t)unsafeJsTestDOMJITPrototypeFunctionGetElementsByName, JSTestDOMJIT::info(), JSC::DOMJIT::Effect::forRead(DOMJIT::AbstractHeapRepository::DOM), DOMJIT::IDLResultTypeFilter<IDLInterface<NodeList>>::value, DOMJIT::IDLArgumentTypeFilter<IDLAtomStringAdaptor<IDLDOMString>>::value);
> 
> static const JSC::DOMJIT::GetterSetter DOMJITAttributeForTestDOMJITAnyAttr {
> jsTestDOMJITAnyAttr,
>@@ -1208,7 +1208,7 @@ static inline JSC::EncodedJSValue jsTestDOMJITPrototypeFunctionGetElementByIdBod
> auto& impl = castedThis->wrapped();
> if (UNLIKELY(state->argumentCount() < 1))
> return throwVMError(state, throwScope, createNotEnoughArgumentsError(state));
>- auto elementId = convert<IDLRequiresExistingAtomicStringAdaptor<IDLDOMString>>(*state, state->uncheckedArgument(0));
>+ auto elementId = convert<IDLRequiresExistingAtomStringAdaptor<IDLDOMString>>(*state, state->uncheckedArgument(0));
> RETURN_IF_EXCEPTION(throwScope, encodedJSValue());
> return JSValue::encode(toJS<IDLInterface<Element>>(*state, *castedThis->globalObject(), impl.getElementById(WTFMove(elementId))));
> }
>@@ -1218,7 +1218,7 @@ EncodedJSValue JSC_HOST_CALL jsTestDOMJITPrototypeFunctionGetElementById(ExecSta
> return IDLOperation<JSTestDOMJIT>::call<jsTestDOMJITPrototypeFunctionGetElementByIdBody>(*state, "getElementById");
> }
> 
>-JSC::EncodedJSValue JIT_OPERATION unsafeJsTestDOMJITPrototypeFunctionGetElementById(JSC::ExecState* state, JSTestDOMJIT* castedThis, DOMJIT::IDLJSArgumentType<IDLRequiresExistingAtomicStringAdaptor<IDLDOMString>> encodedElementId)
>+JSC::EncodedJSValue JIT_OPERATION unsafeJsTestDOMJITPrototypeFunctionGetElementById(JSC::ExecState* state, JSTestDOMJIT* castedThis, DOMJIT::IDLJSArgumentType<IDLRequiresExistingAtomStringAdaptor<IDLDOMString>> encodedElementId)
> {
> UNUSED_PARAM(state);
> VM& vm = state->vm();
>@@ -1226,7 +1226,7 @@ JSC::EncodedJSValue JIT_OPERATION unsafeJsTestDOMJITPrototypeFunctionGetElementB
> auto throwScope = DECLARE_THROW_SCOPE(vm);
> UNUSED_PARAM(throwScope);
> auto& impl = castedThis->wrapped();
>- auto elementId = DOMJIT::DirectConverter<IDLRequiresExistingAtomicStringAdaptor<IDLDOMString>>::directConvert(*state, encodedElementId);
>+ auto elementId = DOMJIT::DirectConverter<IDLRequiresExistingAtomStringAdaptor<IDLDOMString>>::directConvert(*state, encodedElementId);
> RETURN_IF_EXCEPTION(throwScope, encodedJSValue());
> return JSValue::encode(toJS<IDLInterface<Element>>(*state, *castedThis->globalObject(), impl.getElementById(WTFMove(elementId))));
> }
>@@ -1238,7 +1238,7 @@ static inline JSC::EncodedJSValue jsTestDOMJITPrototypeFunctionGetElementsByName
> auto& impl = castedThis->wrapped();
> if (UNLIKELY(state->argumentCount() < 1))
> return throwVMError(state, throwScope, createNotEnoughArgumentsError(state));
>- auto elementName = convert<IDLAtomicStringAdaptor<IDLDOMString>>(*state, state->uncheckedArgument(0));
>+ auto elementName = convert<IDLAtomStringAdaptor<IDLDOMString>>(*state, state->uncheckedArgument(0));
> RETURN_IF_EXCEPTION(throwScope, encodedJSValue());
> return JSValue::encode(toJS<IDLInterface<NodeList>>(*state, *castedThis->globalObject(), impl.getElementsByName(WTFMove(elementName))));
> }
>@@ -1248,7 +1248,7 @@ EncodedJSValue JSC_HOST_CALL jsTestDOMJITPrototypeFunctionGetElementsByName(Exec
> return IDLOperation<JSTestDOMJIT>::call<jsTestDOMJITPrototypeFunctionGetElementsByNameBody>(*state, "getElementsByName");
> }
> 
>-JSC::EncodedJSValue JIT_OPERATION unsafeJsTestDOMJITPrototypeFunctionGetElementsByName(JSC::ExecState* state, JSTestDOMJIT* castedThis, DOMJIT::IDLJSArgumentType<IDLAtomicStringAdaptor<IDLDOMString>> encodedElementName)
>+JSC::EncodedJSValue JIT_OPERATION unsafeJsTestDOMJITPrototypeFunctionGetElementsByName(JSC::ExecState* state, JSTestDOMJIT* castedThis, DOMJIT::IDLJSArgumentType<IDLAtomStringAdaptor<IDLDOMString>> encodedElementName)
> {
> UNUSED_PARAM(state);
> VM& vm = state->vm();
>@@ -1256,7 +1256,7 @@ JSC::EncodedJSValue JIT_OPERATION unsafeJsTestDOMJITPrototypeFunctionGetElements
> auto throwScope = DECLARE_THROW_SCOPE(vm);
> UNUSED_PARAM(throwScope);
> auto& impl = castedThis->wrapped();
>- auto elementName = DOMJIT::DirectConverter<IDLAtomicStringAdaptor<IDLDOMString>>::directConvert(*state, encodedElementName);
>+ auto elementName = DOMJIT::DirectConverter<IDLAtomStringAdaptor<IDLDOMString>>::directConvert(*state, encodedElementName);
> RETURN_IF_EXCEPTION(throwScope, encodedJSValue());
> return JSValue::encode(toJS<IDLInterface<NodeList>>(*state, *castedThis->globalObject(), impl.getElementsByName(WTFMove(elementName))));
> }
>diff --git a/Source/WebCore/bindings/scripts/test/JS/JSTestEventTarget.cpp b/Source/WebCore/bindings/scripts/test/JS/JSTestEventTarget.cpp
>index 5fc7cb6c555e745bcfbabca0643118c6d61f076f..92b9d98a5e7372f2146c74181107b5a288a39991 100644
>--- a/Source/WebCore/bindings/scripts/test/JS/JSTestEventTarget.cpp
>+++ b/Source/WebCore/bindings/scripts/test/JS/JSTestEventTarget.cpp
>@@ -152,7 +152,7 @@ bool JSTestEventTarget::getOwnPropertySlot(JSObject* object, ExecState* state, P
> }
> using GetterIDLType = IDLInterface<Node>;
> auto getterFunctor = [] (auto& thisObject, auto propertyName) -> Optional<typename GetterIDLType::ImplementationType> {
>- auto result = thisObject.wrapped().namedItem(propertyNameToAtomicString(propertyName));
>+ auto result = thisObject.wrapped().namedItem(propertyNameToAtomString(propertyName));
> if (!GetterIDLType::isNullValue(result))
> return typename GetterIDLType::ImplementationType { GetterIDLType::extractValueFromNullable(result) };
> return WTF::nullopt;
>@@ -180,7 +180,7 @@ bool JSTestEventTarget::getOwnPropertySlotByIndex(JSObject* object, ExecState* s
> auto propertyName = Identifier::from(state, index);
> using GetterIDLType = IDLInterface<Node>;
> auto getterFunctor = [] (auto& thisObject, auto propertyName) -> Optional<typename GetterIDLType::ImplementationType> {
>- auto result = thisObject.wrapped().namedItem(propertyNameToAtomicString(propertyName));
>+ auto result = thisObject.wrapped().namedItem(propertyNameToAtomString(propertyName));
> if (!GetterIDLType::isNullValue(result))
> return typename GetterIDLType::ImplementationType { GetterIDLType::extractValueFromNullable(result) };
> return WTF::nullopt;
>diff --git a/Source/WebCore/bindings/scripts/test/JS/JSTestNamedAndIndexedSetterNoIdentifier.cpp b/Source/WebCore/bindings/scripts/test/JS/JSTestNamedAndIndexedSetterNoIdentifier.cpp
>index 35b77a74db67869f4da76726848ca3c633950c57..39e6ae5778b107cd625b2d28239a62e1fd91263e 100644
>--- a/Source/WebCore/bindings/scripts/test/JS/JSTestNamedAndIndexedSetterNoIdentifier.cpp
>+++ b/Source/WebCore/bindings/scripts/test/JS/JSTestNamedAndIndexedSetterNoIdentifier.cpp
>@@ -151,7 +151,7 @@ bool JSTestNamedAndIndexedSetterNoIdentifier::getOwnPropertySlot(JSObject* objec
> }
> using GetterIDLType = IDLDOMString;
> auto getterFunctor = [] (auto& thisObject, auto propertyName) -> Optional<typename GetterIDLType::ImplementationType> {
>- auto result = thisObject.wrapped().namedItem(propertyNameToAtomicString(propertyName));
>+ auto result = thisObject.wrapped().namedItem(propertyNameToAtomString(propertyName));
> if (!GetterIDLType::isNullValue(result))
> return typename GetterIDLType::ImplementationType { GetterIDLType::extractValueFromNullable(result) };
> return WTF::nullopt;
>@@ -179,7 +179,7 @@ bool JSTestNamedAndIndexedSetterNoIdentifier::getOwnPropertySlotByIndex(JSObject
> auto propertyName = Identifier::from(state, index);
> using GetterIDLType = IDLDOMString;
> auto getterFunctor = [] (auto& thisObject, auto propertyName) -> Optional<typename GetterIDLType::ImplementationType> {
>- auto result = thisObject.wrapped().namedItem(propertyNameToAtomicString(propertyName));
>+ auto result = thisObject.wrapped().namedItem(propertyNameToAtomString(propertyName));
> if (!GetterIDLType::isNullValue(result))
> return typename GetterIDLType::ImplementationType { GetterIDLType::extractValueFromNullable(result) };
> return WTF::nullopt;
>diff --git a/Source/WebCore/bindings/scripts/test/JS/JSTestNamedAndIndexedSetterThrowingException.cpp b/Source/WebCore/bindings/scripts/test/JS/JSTestNamedAndIndexedSetterThrowingException.cpp
>index f1b1da1b54b4ba24c8794e921db565b991c9dc7f..9f8dcc68bb73431592d8bcb89b4f4b146791cea3 100644
>--- a/Source/WebCore/bindings/scripts/test/JS/JSTestNamedAndIndexedSetterThrowingException.cpp
>+++ b/Source/WebCore/bindings/scripts/test/JS/JSTestNamedAndIndexedSetterThrowingException.cpp
>@@ -151,7 +151,7 @@ bool JSTestNamedAndIndexedSetterThrowingException::getOwnPropertySlot(JSObject*
> }
> using GetterIDLType = IDLDOMString;
> auto getterFunctor = [] (auto& thisObject, auto propertyName) -> Optional<typename GetterIDLType::ImplementationType> {
>- auto result = thisObject.wrapped().namedItem(propertyNameToAtomicString(propertyName));
>+ auto result = thisObject.wrapped().namedItem(propertyNameToAtomString(propertyName));
> if (!GetterIDLType::isNullValue(result))
> return typename GetterIDLType::ImplementationType { GetterIDLType::extractValueFromNullable(result) };
> return WTF::nullopt;
>@@ -179,7 +179,7 @@ bool JSTestNamedAndIndexedSetterThrowingException::getOwnPropertySlotByIndex(JSO
> auto propertyName = Identifier::from(state, index);
> using GetterIDLType = IDLDOMString;
> auto getterFunctor = [] (auto& thisObject, auto propertyName) -> Optional<typename GetterIDLType::ImplementationType> {
>- auto result = thisObject.wrapped().namedItem(propertyNameToAtomicString(propertyName));
>+ auto result = thisObject.wrapped().namedItem(propertyNameToAtomString(propertyName));
> if (!GetterIDLType::isNullValue(result))
> return typename GetterIDLType::ImplementationType { GetterIDLType::extractValueFromNullable(result) };
> return WTF::nullopt;
>diff --git a/Source/WebCore/bindings/scripts/test/JS/JSTestNamedAndIndexedSetterWithIdentifier.cpp b/Source/WebCore/bindings/scripts/test/JS/JSTestNamedAndIndexedSetterWithIdentifier.cpp
>index fb6089cbd41a5bfe3282737b227158d30817fe7a..c3f14e57acb357ee16e71eb60d0c922a2285125f 100644
>--- a/Source/WebCore/bindings/scripts/test/JS/JSTestNamedAndIndexedSetterWithIdentifier.cpp
>+++ b/Source/WebCore/bindings/scripts/test/JS/JSTestNamedAndIndexedSetterWithIdentifier.cpp
>@@ -160,7 +160,7 @@ bool JSTestNamedAndIndexedSetterWithIdentifier::getOwnPropertySlot(JSObject* obj
> }
> using GetterIDLType = IDLDOMString;
> auto getterFunctor = [] (auto& thisObject, auto propertyName) -> Optional<typename GetterIDLType::ImplementationType> {
>- auto result = thisObject.wrapped().namedItem(propertyNameToAtomicString(propertyName));
>+ auto result = thisObject.wrapped().namedItem(propertyNameToAtomString(propertyName));
> if (!GetterIDLType::isNullValue(result))
> return typename GetterIDLType::ImplementationType { GetterIDLType::extractValueFromNullable(result) };
> return WTF::nullopt;
>@@ -188,7 +188,7 @@ bool JSTestNamedAndIndexedSetterWithIdentifier::getOwnPropertySlotByIndex(JSObje
> auto propertyName = Identifier::from(state, index);
> using GetterIDLType = IDLDOMString;
> auto getterFunctor = [] (auto& thisObject, auto propertyName) -> Optional<typename GetterIDLType::ImplementationType> {
>- auto result = thisObject.wrapped().namedItem(propertyNameToAtomicString(propertyName));
>+ auto result = thisObject.wrapped().namedItem(propertyNameToAtomString(propertyName));
> if (!GetterIDLType::isNullValue(result))
> return typename GetterIDLType::ImplementationType { GetterIDLType::extractValueFromNullable(result) };
> return WTF::nullopt;
>diff --git a/Source/WebCore/bindings/scripts/test/JS/JSTestNamedDeleterNoIdentifier.cpp b/Source/WebCore/bindings/scripts/test/JS/JSTestNamedDeleterNoIdentifier.cpp
>index e7d91f8c868c253d6b88012142553112c3f8d80e..ef3e5591aeff4c3f6833d1d8632071d73e99b5bb 100644
>--- a/Source/WebCore/bindings/scripts/test/JS/JSTestNamedDeleterNoIdentifier.cpp
>+++ b/Source/WebCore/bindings/scripts/test/JS/JSTestNamedDeleterNoIdentifier.cpp
>@@ -142,7 +142,7 @@ bool JSTestNamedDeleterNoIdentifier::getOwnPropertySlot(JSObject* object, ExecSt
> ASSERT_GC_OBJECT_INHERITS(thisObject, info());
> using GetterIDLType = IDLDOMString;
> auto getterFunctor = [] (auto& thisObject, auto propertyName) -> Optional<typename GetterIDLType::ImplementationType> {
>- auto result = thisObject.wrapped().namedItem(propertyNameToAtomicString(propertyName));
>+ auto result = thisObject.wrapped().namedItem(propertyNameToAtomString(propertyName));
> if (!GetterIDLType::isNullValue(result))
> return typename GetterIDLType::ImplementationType { GetterIDLType::extractValueFromNullable(result) };
> return WTF::nullopt;
>@@ -162,7 +162,7 @@ bool JSTestNamedDeleterNoIdentifier::getOwnPropertySlotByIndex(JSObject* object,
> auto propertyName = Identifier::from(state, index);
> using GetterIDLType = IDLDOMString;
> auto getterFunctor = [] (auto& thisObject, auto propertyName) -> Optional<typename GetterIDLType::ImplementationType> {
>- auto result = thisObject.wrapped().namedItem(propertyNameToAtomicString(propertyName));
>+ auto result = thisObject.wrapped().namedItem(propertyNameToAtomString(propertyName));
> if (!GetterIDLType::isNullValue(result))
> return typename GetterIDLType::ImplementationType { GetterIDLType::extractValueFromNullable(result) };
> return WTF::nullopt;
>diff --git a/Source/WebCore/bindings/scripts/test/JS/JSTestNamedDeleterThrowingException.cpp b/Source/WebCore/bindings/scripts/test/JS/JSTestNamedDeleterThrowingException.cpp
>index a7d76ba7a3deb5845304be65c89d8e0da29daf7a..0fd763b328fbb8818cdc11d98fc85538fc73e8fb 100644
>--- a/Source/WebCore/bindings/scripts/test/JS/JSTestNamedDeleterThrowingException.cpp
>+++ b/Source/WebCore/bindings/scripts/test/JS/JSTestNamedDeleterThrowingException.cpp
>@@ -142,7 +142,7 @@ bool JSTestNamedDeleterThrowingException::getOwnPropertySlot(JSObject* object, E
> ASSERT_GC_OBJECT_INHERITS(thisObject, info());
> using GetterIDLType = IDLDOMString;
> auto getterFunctor = [] (auto& thisObject, auto propertyName) -> Optional<typename GetterIDLType::ImplementationType> {
>- auto result = thisObject.wrapped().namedItem(propertyNameToAtomicString(propertyName));
>+ auto result = thisObject.wrapped().namedItem(propertyNameToAtomString(propertyName));
> if (!GetterIDLType::isNullValue(result))
> return typename GetterIDLType::ImplementationType { GetterIDLType::extractValueFromNullable(result) };
> return WTF::nullopt;
>@@ -162,7 +162,7 @@ bool JSTestNamedDeleterThrowingException::getOwnPropertySlotByIndex(JSObject* ob
> auto propertyName = Identifier::from(state, index);
> using GetterIDLType = IDLDOMString;
> auto getterFunctor = [] (auto& thisObject, auto propertyName) -> Optional<typename GetterIDLType::ImplementationType> {
>- auto result = thisObject.wrapped().namedItem(propertyNameToAtomicString(propertyName));
>+ auto result = thisObject.wrapped().namedItem(propertyNameToAtomString(propertyName));
> if (!GetterIDLType::isNullValue(result))
> return typename GetterIDLType::ImplementationType { GetterIDLType::extractValueFromNullable(result) };
> return WTF::nullopt;
>diff --git a/Source/WebCore/bindings/scripts/test/JS/JSTestNamedDeleterWithIdentifier.cpp b/Source/WebCore/bindings/scripts/test/JS/JSTestNamedDeleterWithIdentifier.cpp
>index 9edab591d948349650ad123919f6b36316d54d6b..9e500bdd6d80e81583cc6b77275266b398821134 100644
>--- a/Source/WebCore/bindings/scripts/test/JS/JSTestNamedDeleterWithIdentifier.cpp
>+++ b/Source/WebCore/bindings/scripts/test/JS/JSTestNamedDeleterWithIdentifier.cpp
>@@ -148,7 +148,7 @@ bool JSTestNamedDeleterWithIdentifier::getOwnPropertySlot(JSObject* object, Exec
> ASSERT_GC_OBJECT_INHERITS(thisObject, info());
> using GetterIDLType = IDLDOMString;
> auto getterFunctor = [] (auto& thisObject, auto propertyName) -> Optional<typename GetterIDLType::ImplementationType> {
>- auto result = thisObject.wrapped().namedItem(propertyNameToAtomicString(propertyName));
>+ auto result = thisObject.wrapped().namedItem(propertyNameToAtomString(propertyName));
> if (!GetterIDLType::isNullValue(result))
> return typename GetterIDLType::ImplementationType { GetterIDLType::extractValueFromNullable(result) };
> return WTF::nullopt;
>@@ -168,7 +168,7 @@ bool JSTestNamedDeleterWithIdentifier::getOwnPropertySlotByIndex(JSObject* objec
> auto propertyName = Identifier::from(state, index);
> using GetterIDLType = IDLDOMString;
> auto getterFunctor = [] (auto& thisObject, auto propertyName) -> Optional<typename GetterIDLType::ImplementationType> {
>- auto result = thisObject.wrapped().namedItem(propertyNameToAtomicString(propertyName));
>+ auto result = thisObject.wrapped().namedItem(propertyNameToAtomString(propertyName));
> if (!GetterIDLType::isNullValue(result))
> return typename GetterIDLType::ImplementationType { GetterIDLType::extractValueFromNullable(result) };
> return WTF::nullopt;
>diff --git a/Source/WebCore/bindings/scripts/test/JS/JSTestNamedDeleterWithIndexedGetter.cpp b/Source/WebCore/bindings/scripts/test/JS/JSTestNamedDeleterWithIndexedGetter.cpp
>index 2fb624a015b4ba7898d909250bd074c920ca6e3e..9492b57ef7ed1f9ccd487ee35f20eae3998ce867 100644
>--- a/Source/WebCore/bindings/scripts/test/JS/JSTestNamedDeleterWithIndexedGetter.cpp
>+++ b/Source/WebCore/bindings/scripts/test/JS/JSTestNamedDeleterWithIndexedGetter.cpp
>@@ -151,7 +151,7 @@ bool JSTestNamedDeleterWithIndexedGetter::getOwnPropertySlot(JSObject* object, E
> }
> using GetterIDLType = IDLDOMString;
> auto getterFunctor = [] (auto& thisObject, auto propertyName) -> Optional<typename GetterIDLType::ImplementationType> {
>- auto result = thisObject.wrapped().namedItem(propertyNameToAtomicString(propertyName));
>+ auto result = thisObject.wrapped().namedItem(propertyNameToAtomString(propertyName));
> if (!GetterIDLType::isNullValue(result))
> return typename GetterIDLType::ImplementationType { GetterIDLType::extractValueFromNullable(result) };
> return WTF::nullopt;
>@@ -179,7 +179,7 @@ bool JSTestNamedDeleterWithIndexedGetter::getOwnPropertySlotByIndex(JSObject* ob
> auto propertyName = Identifier::from(state, index);
> using GetterIDLType = IDLDOMString;
> auto getterFunctor = [] (auto& thisObject, auto propertyName) -> Optional<typename GetterIDLType::ImplementationType> {
>- auto result = thisObject.wrapped().namedItem(propertyNameToAtomicString(propertyName));
>+ auto result = thisObject.wrapped().namedItem(propertyNameToAtomString(propertyName));
> if (!GetterIDLType::isNullValue(result))
> return typename GetterIDLType::ImplementationType { GetterIDLType::extractValueFromNullable(result) };
> return WTF::nullopt;
>diff --git a/Source/WebCore/bindings/scripts/test/JS/JSTestNamedGetterCallWith.cpp b/Source/WebCore/bindings/scripts/test/JS/JSTestNamedGetterCallWith.cpp
>index f5959690980573180e86246f1483be9d03090f2e..10e4a6b4b6353dd061e101873b3da6b9787fa4fd 100644
>--- a/Source/WebCore/bindings/scripts/test/JS/JSTestNamedGetterCallWith.cpp
>+++ b/Source/WebCore/bindings/scripts/test/JS/JSTestNamedGetterCallWith.cpp
>@@ -142,7 +142,7 @@ bool JSTestNamedGetterCallWith::getOwnPropertySlot(JSObject* object, ExecState*
> ASSERT_GC_OBJECT_INHERITS(thisObject, info());
> using GetterIDLType = IDLDOMString;
> auto getterFunctor = [] (auto& thisObject, auto propertyName) -> Optional<typename GetterIDLType::ImplementationType> {
>- auto result = thisObject.wrapped().namedItem(worldForDOMObject(thisObject), propertyNameToAtomicString(propertyName));
>+ auto result = thisObject.wrapped().namedItem(worldForDOMObject(thisObject), propertyNameToAtomString(propertyName));
> if (!GetterIDLType::isNullValue(result))
> return typename GetterIDLType::ImplementationType { GetterIDLType::extractValueFromNullable(result) };
> return WTF::nullopt;
>@@ -162,7 +162,7 @@ bool JSTestNamedGetterCallWith::getOwnPropertySlotByIndex(JSObject* object, Exec
> auto propertyName = Identifier::from(state, index);
> using GetterIDLType = IDLDOMString;
> auto getterFunctor = [] (auto& thisObject, auto propertyName) -> Optional<typename GetterIDLType::ImplementationType> {
>- auto result = thisObject.wrapped().namedItem(worldForDOMObject(thisObject), propertyNameToAtomicString(propertyName));
>+ auto result = thisObject.wrapped().namedItem(worldForDOMObject(thisObject), propertyNameToAtomString(propertyName));
> if (!GetterIDLType::isNullValue(result))
> return typename GetterIDLType::ImplementationType { GetterIDLType::extractValueFromNullable(result) };
> return WTF::nullopt;
>diff --git a/Source/WebCore/bindings/scripts/test/JS/JSTestNamedGetterNoIdentifier.cpp b/Source/WebCore/bindings/scripts/test/JS/JSTestNamedGetterNoIdentifier.cpp
>index fae104a834cd1db8a4b2a41a7c167c9b7bd1f8a5..b2db2ada44f97798b91c0d86b0c6f5d3399dea98 100644
>--- a/Source/WebCore/bindings/scripts/test/JS/JSTestNamedGetterNoIdentifier.cpp
>+++ b/Source/WebCore/bindings/scripts/test/JS/JSTestNamedGetterNoIdentifier.cpp
>@@ -142,7 +142,7 @@ bool JSTestNamedGetterNoIdentifier::getOwnPropertySlot(JSObject* object, ExecSta
> ASSERT_GC_OBJECT_INHERITS(thisObject, info());
> using GetterIDLType = IDLDOMString;
> auto getterFunctor = [] (auto& thisObject, auto propertyName) -> Optional<typename GetterIDLType::ImplementationType> {
>- auto result = thisObject.wrapped().namedItem(propertyNameToAtomicString(propertyName));
>+ auto result = thisObject.wrapped().namedItem(propertyNameToAtomString(propertyName));
> if (!GetterIDLType::isNullValue(result))
> return typename GetterIDLType::ImplementationType { GetterIDLType::extractValueFromNullable(result) };
> return WTF::nullopt;
>@@ -162,7 +162,7 @@ bool JSTestNamedGetterNoIdentifier::getOwnPropertySlotByIndex(JSObject* object,
> auto propertyName = Identifier::from(state, index);
> using GetterIDLType = IDLDOMString;
> auto getterFunctor = [] (auto& thisObject, auto propertyName) -> Optional<typename GetterIDLType::ImplementationType> {
>- auto result = thisObject.wrapped().namedItem(propertyNameToAtomicString(propertyName));
>+ auto result = thisObject.wrapped().namedItem(propertyNameToAtomString(propertyName));
> if (!GetterIDLType::isNullValue(result))
> return typename GetterIDLType::ImplementationType { GetterIDLType::extractValueFromNullable(result) };
> return WTF::nullopt;
>diff --git a/Source/WebCore/bindings/scripts/test/JS/JSTestNamedGetterWithIdentifier.cpp b/Source/WebCore/bindings/scripts/test/JS/JSTestNamedGetterWithIdentifier.cpp
>index 918b2d61ebd6d22f7062164f65dd241ca48b4814..daa279f99f0a2b18a71313ecd56352f0547e74a2 100644
>--- a/Source/WebCore/bindings/scripts/test/JS/JSTestNamedGetterWithIdentifier.cpp
>+++ b/Source/WebCore/bindings/scripts/test/JS/JSTestNamedGetterWithIdentifier.cpp
>@@ -148,7 +148,7 @@ bool JSTestNamedGetterWithIdentifier::getOwnPropertySlot(JSObject* object, ExecS
> ASSERT_GC_OBJECT_INHERITS(thisObject, info());
> using GetterIDLType = IDLDOMString;
> auto getterFunctor = [] (auto& thisObject, auto propertyName) -> Optional<typename GetterIDLType::ImplementationType> {
>- auto result = thisObject.wrapped().getterName(propertyNameToAtomicString(propertyName));
>+ auto result = thisObject.wrapped().getterName(propertyNameToAtomString(propertyName));
> if (!GetterIDLType::isNullValue(result))
> return typename GetterIDLType::ImplementationType { GetterIDLType::extractValueFromNullable(result) };
> return WTF::nullopt;
>@@ -168,7 +168,7 @@ bool JSTestNamedGetterWithIdentifier::getOwnPropertySlotByIndex(JSObject* object
> auto propertyName = Identifier::from(state, index);
> using GetterIDLType = IDLDOMString;
> auto getterFunctor = [] (auto& thisObject, auto propertyName) -> Optional<typename GetterIDLType::ImplementationType> {
>- auto result = thisObject.wrapped().getterName(propertyNameToAtomicString(propertyName));
>+ auto result = thisObject.wrapped().getterName(propertyNameToAtomString(propertyName));
> if (!GetterIDLType::isNullValue(result))
> return typename GetterIDLType::ImplementationType { GetterIDLType::extractValueFromNullable(result) };
> return WTF::nullopt;
>diff --git a/Source/WebCore/bindings/scripts/test/JS/JSTestNamedSetterNoIdentifier.cpp b/Source/WebCore/bindings/scripts/test/JS/JSTestNamedSetterNoIdentifier.cpp
>index 021ce1ea16742d3910eab1e9756e1655fbf757b1..de61438d03a821dff14e99a431e15b8cd038438c 100644
>--- a/Source/WebCore/bindings/scripts/test/JS/JSTestNamedSetterNoIdentifier.cpp
>+++ b/Source/WebCore/bindings/scripts/test/JS/JSTestNamedSetterNoIdentifier.cpp
>@@ -142,7 +142,7 @@ bool JSTestNamedSetterNoIdentifier::getOwnPropertySlot(JSObject* object, ExecSta
> ASSERT_GC_OBJECT_INHERITS(thisObject, info());
> using GetterIDLType = IDLDOMString;
> auto getterFunctor = [] (auto& thisObject, auto propertyName) -> Optional<typename GetterIDLType::ImplementationType> {
>- auto result = thisObject.wrapped().namedItem(propertyNameToAtomicString(propertyName));
>+ auto result = thisObject.wrapped().namedItem(propertyNameToAtomString(propertyName));
> if (!GetterIDLType::isNullValue(result))
> return typename GetterIDLType::ImplementationType { GetterIDLType::extractValueFromNullable(result) };
> return WTF::nullopt;
>@@ -162,7 +162,7 @@ bool JSTestNamedSetterNoIdentifier::getOwnPropertySlotByIndex(JSObject* object,
> auto propertyName = Identifier::from(state, index);
> using GetterIDLType = IDLDOMString;
> auto getterFunctor = [] (auto& thisObject, auto propertyName) -> Optional<typename GetterIDLType::ImplementationType> {
>- auto result = thisObject.wrapped().namedItem(propertyNameToAtomicString(propertyName));
>+ auto result = thisObject.wrapped().namedItem(propertyNameToAtomString(propertyName));
> if (!GetterIDLType::isNullValue(result))
> return typename GetterIDLType::ImplementationType { GetterIDLType::extractValueFromNullable(result) };
> return WTF::nullopt;
>diff --git a/Source/WebCore/bindings/scripts/test/JS/JSTestNamedSetterThrowingException.cpp b/Source/WebCore/bindings/scripts/test/JS/JSTestNamedSetterThrowingException.cpp
>index 052a1a22825ab4d6099b8db6da18d5174d50ba01..ff95182d91dfdd2434bb5fa059faca04d2b8365f 100644
>--- a/Source/WebCore/bindings/scripts/test/JS/JSTestNamedSetterThrowingException.cpp
>+++ b/Source/WebCore/bindings/scripts/test/JS/JSTestNamedSetterThrowingException.cpp
>@@ -142,7 +142,7 @@ bool JSTestNamedSetterThrowingException::getOwnPropertySlot(JSObject* object, Ex
> ASSERT_GC_OBJECT_INHERITS(thisObject, info());
> using GetterIDLType = IDLDOMString;
> auto getterFunctor = [] (auto& thisObject, auto propertyName) -> Optional<typename GetterIDLType::ImplementationType> {
>- auto result = thisObject.wrapped().namedItem(propertyNameToAtomicString(propertyName));
>+ auto result = thisObject.wrapped().namedItem(propertyNameToAtomString(propertyName));
> if (!GetterIDLType::isNullValue(result))
> return typename GetterIDLType::ImplementationType { GetterIDLType::extractValueFromNullable(result) };
> return WTF::nullopt;
>@@ -162,7 +162,7 @@ bool JSTestNamedSetterThrowingException::getOwnPropertySlotByIndex(JSObject* obj
> auto propertyName = Identifier::from(state, index);
> using GetterIDLType = IDLDOMString;
> auto getterFunctor = [] (auto& thisObject, auto propertyName) -> Optional<typename GetterIDLType::ImplementationType> {
>- auto result = thisObject.wrapped().namedItem(propertyNameToAtomicString(propertyName));
>+ auto result = thisObject.wrapped().namedItem(propertyNameToAtomString(propertyName));
> if (!GetterIDLType::isNullValue(result))
> return typename GetterIDLType::ImplementationType { GetterIDLType::extractValueFromNullable(result) };
> return WTF::nullopt;
>diff --git a/Source/WebCore/bindings/scripts/test/JS/JSTestNamedSetterWithIdentifier.cpp b/Source/WebCore/bindings/scripts/test/JS/JSTestNamedSetterWithIdentifier.cpp
>index 0b8f5de1cac641abdf0f690bd82dbb05d3f29a71..f5fb8b27cb05e48aec80481eb06df7b5f16171b0 100644
>--- a/Source/WebCore/bindings/scripts/test/JS/JSTestNamedSetterWithIdentifier.cpp
>+++ b/Source/WebCore/bindings/scripts/test/JS/JSTestNamedSetterWithIdentifier.cpp
>@@ -148,7 +148,7 @@ bool JSTestNamedSetterWithIdentifier::getOwnPropertySlot(JSObject* object, ExecS
> ASSERT_GC_OBJECT_INHERITS(thisObject, info());
> using GetterIDLType = IDLDOMString;
> auto getterFunctor = [] (auto& thisObject, auto propertyName) -> Optional<typename GetterIDLType::ImplementationType> {
>- auto result = thisObject.wrapped().namedItem(propertyNameToAtomicString(propertyName));
>+ auto result = thisObject.wrapped().namedItem(propertyNameToAtomString(propertyName));
> if (!GetterIDLType::isNullValue(result))
> return typename GetterIDLType::ImplementationType { GetterIDLType::extractValueFromNullable(result) };
> return WTF::nullopt;
>@@ -168,7 +168,7 @@ bool JSTestNamedSetterWithIdentifier::getOwnPropertySlotByIndex(JSObject* object
> auto propertyName = Identifier::from(state, index);
> using GetterIDLType = IDLDOMString;
> auto getterFunctor = [] (auto& thisObject, auto propertyName) -> Optional<typename GetterIDLType::ImplementationType> {
>- auto result = thisObject.wrapped().namedItem(propertyNameToAtomicString(propertyName));
>+ auto result = thisObject.wrapped().namedItem(propertyNameToAtomString(propertyName));
> if (!GetterIDLType::isNullValue(result))
> return typename GetterIDLType::ImplementationType { GetterIDLType::extractValueFromNullable(result) };
> return WTF::nullopt;
>diff --git a/Source/WebCore/bindings/scripts/test/JS/JSTestNamedSetterWithIndexedGetter.cpp b/Source/WebCore/bindings/scripts/test/JS/JSTestNamedSetterWithIndexedGetter.cpp
>index 090da163fc52093171cb4fdc04abd6beb8577850..80eb5525621cdefbdc98eb5da50290d38a8d74f2 100644
>--- a/Source/WebCore/bindings/scripts/test/JS/JSTestNamedSetterWithIndexedGetter.cpp
>+++ b/Source/WebCore/bindings/scripts/test/JS/JSTestNamedSetterWithIndexedGetter.cpp
>@@ -160,7 +160,7 @@ bool JSTestNamedSetterWithIndexedGetter::getOwnPropertySlot(JSObject* object, Ex
> }
> using GetterIDLType = IDLDOMString;
> auto getterFunctor = [] (auto& thisObject, auto propertyName) -> Optional<typename GetterIDLType::ImplementationType> {
>- auto result = thisObject.wrapped().namedItem(propertyNameToAtomicString(propertyName));
>+ auto result = thisObject.wrapped().namedItem(propertyNameToAtomString(propertyName));
> if (!GetterIDLType::isNullValue(result))
> return typename GetterIDLType::ImplementationType { GetterIDLType::extractValueFromNullable(result) };
> return WTF::nullopt;
>@@ -188,7 +188,7 @@ bool JSTestNamedSetterWithIndexedGetter::getOwnPropertySlotByIndex(JSObject* obj
> auto propertyName = Identifier::from(state, index);
> using GetterIDLType = IDLDOMString;
> auto getterFunctor = [] (auto& thisObject, auto propertyName) -> Optional<typename GetterIDLType::ImplementationType> {
>- auto result = thisObject.wrapped().namedItem(propertyNameToAtomicString(propertyName));
>+ auto result = thisObject.wrapped().namedItem(propertyNameToAtomString(propertyName));
> if (!GetterIDLType::isNullValue(result))
> return typename GetterIDLType::ImplementationType { GetterIDLType::extractValueFromNullable(result) };
> return WTF::nullopt;
>diff --git a/Source/WebCore/bindings/scripts/test/JS/JSTestNamedSetterWithIndexedGetterAndSetter.cpp b/Source/WebCore/bindings/scripts/test/JS/JSTestNamedSetterWithIndexedGetterAndSetter.cpp
>index 5d0ba23c476c9c6215b2ce7e115f3559839caf2c..8e15fdf9d10f10699e0575d89a78cf6a027a8d49 100644
>--- a/Source/WebCore/bindings/scripts/test/JS/JSTestNamedSetterWithIndexedGetterAndSetter.cpp
>+++ b/Source/WebCore/bindings/scripts/test/JS/JSTestNamedSetterWithIndexedGetterAndSetter.cpp
>@@ -160,7 +160,7 @@ bool JSTestNamedSetterWithIndexedGetterAndSetter::getOwnPropertySlot(JSObject* o
> }
> using GetterIDLType = IDLDOMString;
> auto getterFunctor = [] (auto& thisObject, auto propertyName) -> Optional<typename GetterIDLType::ImplementationType> {
>- auto result = thisObject.wrapped().namedItem(propertyNameToAtomicString(propertyName));
>+ auto result = thisObject.wrapped().namedItem(propertyNameToAtomString(propertyName));
> if (!GetterIDLType::isNullValue(result))
> return typename GetterIDLType::ImplementationType { GetterIDLType::extractValueFromNullable(result) };
> return WTF::nullopt;
>@@ -188,7 +188,7 @@ bool JSTestNamedSetterWithIndexedGetterAndSetter::getOwnPropertySlotByIndex(JSOb
> auto propertyName = Identifier::from(state, index);
> using GetterIDLType = IDLDOMString;
> auto getterFunctor = [] (auto& thisObject, auto propertyName) -> Optional<typename GetterIDLType::ImplementationType> {
>- auto result = thisObject.wrapped().namedItem(propertyNameToAtomicString(propertyName));
>+ auto result = thisObject.wrapped().namedItem(propertyNameToAtomString(propertyName));
> if (!GetterIDLType::isNullValue(result))
> return typename GetterIDLType::ImplementationType { GetterIDLType::extractValueFromNullable(result) };
> return WTF::nullopt;
>diff --git a/Source/WebCore/bindings/scripts/test/JS/JSTestNamedSetterWithOverrideBuiltins.cpp b/Source/WebCore/bindings/scripts/test/JS/JSTestNamedSetterWithOverrideBuiltins.cpp
>index f27629c7bbb3a2b88bb556d09e754536eb7c400e..53b137bfe3bb60eee76b5040b5e6caf1dbaa1745 100644
>--- a/Source/WebCore/bindings/scripts/test/JS/JSTestNamedSetterWithOverrideBuiltins.cpp
>+++ b/Source/WebCore/bindings/scripts/test/JS/JSTestNamedSetterWithOverrideBuiltins.cpp
>@@ -142,7 +142,7 @@ bool JSTestNamedSetterWithOverrideBuiltins::getOwnPropertySlot(JSObject* object,
> ASSERT_GC_OBJECT_INHERITS(thisObject, info());
> using GetterIDLType = IDLDOMString;
> auto getterFunctor = [] (auto& thisObject, auto propertyName) -> Optional<typename GetterIDLType::ImplementationType> {
>- auto result = thisObject.wrapped().namedItem(propertyNameToAtomicString(propertyName));
>+ auto result = thisObject.wrapped().namedItem(propertyNameToAtomString(propertyName));
> if (!GetterIDLType::isNullValue(result))
> return typename GetterIDLType::ImplementationType { GetterIDLType::extractValueFromNullable(result) };
> return WTF::nullopt;
>@@ -162,7 +162,7 @@ bool JSTestNamedSetterWithOverrideBuiltins::getOwnPropertySlotByIndex(JSObject*
> auto propertyName = Identifier::from(state, index);
> using GetterIDLType = IDLDOMString;
> auto getterFunctor = [] (auto& thisObject, auto propertyName) -> Optional<typename GetterIDLType::ImplementationType> {
>- auto result = thisObject.wrapped().namedItem(propertyNameToAtomicString(propertyName));
>+ auto result = thisObject.wrapped().namedItem(propertyNameToAtomString(propertyName));
> if (!GetterIDLType::isNullValue(result))
> return typename GetterIDLType::ImplementationType { GetterIDLType::extractValueFromNullable(result) };
> return WTF::nullopt;
>diff --git a/Source/WebCore/bindings/scripts/test/JS/JSTestNamedSetterWithUnforgableProperties.cpp b/Source/WebCore/bindings/scripts/test/JS/JSTestNamedSetterWithUnforgableProperties.cpp
>index d4d9738cdb01b8426b663c21fc8298f144ba2637..bc9a41f261e57785679f50b636d0ff4db8782a11 100644
>--- a/Source/WebCore/bindings/scripts/test/JS/JSTestNamedSetterWithUnforgableProperties.cpp
>+++ b/Source/WebCore/bindings/scripts/test/JS/JSTestNamedSetterWithUnforgableProperties.cpp
>@@ -166,7 +166,7 @@ bool JSTestNamedSetterWithUnforgableProperties::getOwnPropertySlot(JSObject* obj
> ASSERT_GC_OBJECT_INHERITS(thisObject, info());
> using GetterIDLType = IDLDOMString;
> auto getterFunctor = [] (auto& thisObject, auto propertyName) -> Optional<typename GetterIDLType::ImplementationType> {
>- auto result = thisObject.wrapped().namedItem(propertyNameToAtomicString(propertyName));
>+ auto result = thisObject.wrapped().namedItem(propertyNameToAtomString(propertyName));
> if (!GetterIDLType::isNullValue(result))
> return typename GetterIDLType::ImplementationType { GetterIDLType::extractValueFromNullable(result) };
> return WTF::nullopt;
>@@ -186,7 +186,7 @@ bool JSTestNamedSetterWithUnforgableProperties::getOwnPropertySlotByIndex(JSObje
> auto propertyName = Identifier::from(state, index);
> using GetterIDLType = IDLDOMString;
> auto getterFunctor = [] (auto& thisObject, auto propertyName) -> Optional<typename GetterIDLType::ImplementationType> {
>- auto result = thisObject.wrapped().namedItem(propertyNameToAtomicString(propertyName));
>+ auto result = thisObject.wrapped().namedItem(propertyNameToAtomString(propertyName));
> if (!GetterIDLType::isNullValue(result))
> return typename GetterIDLType::ImplementationType { GetterIDLType::extractValueFromNullable(result) };
> return WTF::nullopt;
>diff --git a/Source/WebCore/bindings/scripts/test/JS/JSTestNamedSetterWithUnforgablePropertiesAndOverrideBuiltins.cpp b/Source/WebCore/bindings/scripts/test/JS/JSTestNamedSetterWithUnforgablePropertiesAndOverrideBuiltins.cpp
>index ce59e749c273e01c4409f6653af5dfa8d04d2a34..198783eb9f1c40ac710da985bc17b7f2aa25411f 100644
>--- a/Source/WebCore/bindings/scripts/test/JS/JSTestNamedSetterWithUnforgablePropertiesAndOverrideBuiltins.cpp
>+++ b/Source/WebCore/bindings/scripts/test/JS/JSTestNamedSetterWithUnforgablePropertiesAndOverrideBuiltins.cpp
>@@ -166,7 +166,7 @@ bool JSTestNamedSetterWithUnforgablePropertiesAndOverrideBuiltins::getOwnPropert
> ASSERT_GC_OBJECT_INHERITS(thisObject, info());
> using GetterIDLType = IDLDOMString;
> auto getterFunctor = [] (auto& thisObject, auto propertyName) -> Optional<typename GetterIDLType::ImplementationType> {
>- auto result = thisObject.wrapped().namedItem(propertyNameToAtomicString(propertyName));
>+ auto result = thisObject.wrapped().namedItem(propertyNameToAtomString(propertyName));
> if (!GetterIDLType::isNullValue(result))
> return typename GetterIDLType::ImplementationType { GetterIDLType::extractValueFromNullable(result) };
> return WTF::nullopt;
>@@ -186,7 +186,7 @@ bool JSTestNamedSetterWithUnforgablePropertiesAndOverrideBuiltins::getOwnPropert
> auto propertyName = Identifier::from(state, index);
> using GetterIDLType = IDLDOMString;
> auto getterFunctor = [] (auto& thisObject, auto propertyName) -> Optional<typename GetterIDLType::ImplementationType> {
>- auto result = thisObject.wrapped().namedItem(propertyNameToAtomicString(propertyName));
>+ auto result = thisObject.wrapped().namedItem(propertyNameToAtomString(propertyName));
> if (!GetterIDLType::isNullValue(result))
> return typename GetterIDLType::ImplementationType { GetterIDLType::extractValueFromNullable(result) };
> return WTF::nullopt;
>diff --git a/Source/WebCore/bindings/scripts/test/JS/JSTestObj.cpp b/Source/WebCore/bindings/scripts/test/JS/JSTestObj.cpp
>index 5df73bf451507f20d916fd11cf9203af9140fc42..c781c86649c7c3a54418e903f221096687187223 100644
>--- a/Source/WebCore/bindings/scripts/test/JS/JSTestObj.cpp
>+++ b/Source/WebCore/bindings/scripts/test/JS/JSTestObj.cpp
>@@ -6453,7 +6453,7 @@ static inline JSC::EncodedJSValue jsTestObjPrototypeFunctionMethodWithOptionalAt
> UNUSED_PARAM(state);
> UNUSED_PARAM(throwScope);
> auto& impl = castedThis->wrapped();
>- auto str = state->argument(0).isUndefined() ? nullAtom() : convert<IDLAtomicStringAdaptor<IDLDOMString>>(*state, state->uncheckedArgument(0));
>+ auto str = state->argument(0).isUndefined() ? nullAtom() : convert<IDLAtomStringAdaptor<IDLDOMString>>(*state, state->uncheckedArgument(0));
> RETURN_IF_EXCEPTION(throwScope, encodedJSValue());
> impl.methodWithOptionalAtomicString(WTFMove(str));
> return JSValue::encode(jsUndefined());
>@@ -6485,7 +6485,7 @@ static inline JSC::EncodedJSValue jsTestObjPrototypeFunctionMethodWithOptionalAt
> UNUSED_PARAM(state);
> UNUSED_PARAM(throwScope);
> auto& impl = castedThis->wrapped();
>- auto str = state->argument(0).isUndefined() ? AtomicString("foo", AtomicString::ConstructFromLiteral) : convert<IDLAtomicStringAdaptor<IDLDOMString>>(*state, state->uncheckedArgument(0));
>+ auto str = state->argument(0).isUndefined() ? AtomString("foo", AtomString::ConstructFromLiteral) : convert<IDLAtomStringAdaptor<IDLDOMString>>(*state, state->uncheckedArgument(0));
> RETURN_IF_EXCEPTION(throwScope, encodedJSValue());
> impl.methodWithOptionalAtomicStringAndDefaultValue(WTFMove(str));
> return JSValue::encode(jsUndefined());
>@@ -6533,7 +6533,7 @@ static inline JSC::EncodedJSValue jsTestObjPrototypeFunctionMethodWithOptionalAt
> UNUSED_PARAM(state);
> UNUSED_PARAM(throwScope);
> auto& impl = castedThis->wrapped();
>- auto str = state->argument(0).isUndefined() ? nullAtom() : convert<IDLAtomicStringAdaptor<IDLDOMString>>(*state, state->uncheckedArgument(0));
>+ auto str = state->argument(0).isUndefined() ? nullAtom() : convert<IDLAtomStringAdaptor<IDLDOMString>>(*state, state->uncheckedArgument(0));
> RETURN_IF_EXCEPTION(throwScope, encodedJSValue());
> impl.methodWithOptionalAtomicStringIsNull(WTFMove(str));
> return JSValue::encode(jsUndefined());
>@@ -6581,7 +6581,7 @@ static inline JSC::EncodedJSValue jsTestObjPrototypeFunctionMethodWithOptionalAt
> UNUSED_PARAM(state);
> UNUSED_PARAM(throwScope);
> auto& impl = castedThis->wrapped();
>- auto str = state->argument(0).isUndefined() ? emptyAtom() : convert<IDLAtomicStringAdaptor<IDLDOMString>>(*state, state->uncheckedArgument(0));
>+ auto str = state->argument(0).isUndefined() ? emptyAtom() : convert<IDLAtomStringAdaptor<IDLDOMString>>(*state, state->uncheckedArgument(0));
> RETURN_IF_EXCEPTION(throwScope, encodedJSValue());
> impl.methodWithOptionalAtomicStringIsEmptyString(WTFMove(str));
> return JSValue::encode(jsUndefined());
>@@ -7863,7 +7863,7 @@ static inline JSC::EncodedJSValue jsTestObjPrototypeFunctionGetElementByIdBody(J
> auto& impl = castedThis->wrapped();
> if (UNLIKELY(state->argumentCount() < 1))
> return throwVMError(state, throwScope, createNotEnoughArgumentsError(state));
>- auto elementId = convert<IDLRequiresExistingAtomicStringAdaptor<IDLDOMString>>(*state, state->uncheckedArgument(0));
>+ auto elementId = convert<IDLRequiresExistingAtomStringAdaptor<IDLDOMString>>(*state, state->uncheckedArgument(0));
> RETURN_IF_EXCEPTION(throwScope, encodedJSValue());
> return JSValue::encode(toJS<IDLNullable<IDLInterface<Element>>>(*state, *castedThis->globalObject(), impl.getElementById(WTFMove(elementId))));
> }
>diff --git a/Source/WebCore/bindings/scripts/test/JS/JSTestOverrideBuiltins.cpp b/Source/WebCore/bindings/scripts/test/JS/JSTestOverrideBuiltins.cpp
>index 9b5a0272316c7583af327c2bae97f52c79cc8399..30c7912adb6c38d30045955384e300bf530dd217 100644
>--- a/Source/WebCore/bindings/scripts/test/JS/JSTestOverrideBuiltins.cpp
>+++ b/Source/WebCore/bindings/scripts/test/JS/JSTestOverrideBuiltins.cpp
>@@ -151,7 +151,7 @@ bool JSTestOverrideBuiltins::getOwnPropertySlot(JSObject* object, ExecState* sta
> ASSERT_GC_OBJECT_INHERITS(thisObject, info());
> using GetterIDLType = IDLInterface<Node>;
> auto getterFunctor = [] (auto& thisObject, auto propertyName) -> Optional<typename GetterIDLType::ImplementationType> {
>- auto result = thisObject.wrapped().namedItem(propertyNameToAtomicString(propertyName));
>+ auto result = thisObject.wrapped().namedItem(propertyNameToAtomString(propertyName));
> if (!GetterIDLType::isNullValue(result))
> return typename GetterIDLType::ImplementationType { GetterIDLType::extractValueFromNullable(result) };
> return WTF::nullopt;
>@@ -171,7 +171,7 @@ bool JSTestOverrideBuiltins::getOwnPropertySlotByIndex(JSObject* object, ExecSta
> auto propertyName = Identifier::from(state, index);
> using GetterIDLType = IDLInterface<Node>;
> auto getterFunctor = [] (auto& thisObject, auto propertyName) -> Optional<typename GetterIDLType::ImplementationType> {
>- auto result = thisObject.wrapped().namedItem(propertyNameToAtomicString(propertyName));
>+ auto result = thisObject.wrapped().namedItem(propertyNameToAtomString(propertyName));
> if (!GetterIDLType::isNullValue(result))
> return typename GetterIDLType::ImplementationType { GetterIDLType::extractValueFromNullable(result) };
> return WTF::nullopt;
>diff --git a/Source/WebCore/bindings/scripts/test/TestDOMJIT.idl b/Source/WebCore/bindings/scripts/test/TestDOMJIT.idl
>index ac4ea66687ae78c525010990bf910d7d8c370ec7..c602f59b082f039672b1ac0e3ac139df979ac265 100644
>--- a/Source/WebCore/bindings/scripts/test/TestDOMJIT.idl
>+++ b/Source/WebCore/bindings/scripts/test/TestDOMJIT.idl
>@@ -67,6 +67,6 @@ interface TestDOMJIT : Node {
> [DOMJIT=ReadDOM] DOMString? getAttribute(DOMString name);
> [DOMJIT=ReadDOM] DOMString item(unsigned short x, unsigned short y);
> [DOMJIT=ReadDOM] boolean hasAttribute();
>- [DOMJIT=ReadDOM] Element getElementById([RequiresExistingAtomicString] DOMString elementId);
>- [DOMJIT=ReadDOM] NodeList getElementsByName([AtomicString] DOMString elementName);
>+ [DOMJIT=ReadDOM] Element getElementById([RequiresExistingAtomString] DOMString elementId);
>+ [DOMJIT=ReadDOM] NodeList getElementsByName([AtomString] DOMString elementName);
> };
>diff --git a/Source/WebCore/bindings/scripts/test/TestObj.idl b/Source/WebCore/bindings/scripts/test/TestObj.idl
>index 2771752214c9e65ae1de06c0d580ddffdb208205..0872a9f5132b67dca6144fe6f343d8f22ac73828 100644
>--- a/Source/WebCore/bindings/scripts/test/TestObj.idl
>+++ b/Source/WebCore/bindings/scripts/test/TestObj.idl
>@@ -220,15 +220,15 @@ enum TestConfidence { "high", "kinda-low" };
> void methodWithNonOptionalArgAndTwoOptionalArgs(long nonOpt, optional long opt1, optional long opt2);
> void methodWithOptionalString(optional DOMString str);
> void methodWithOptionalUSVString(optional USVString str);
>- void methodWithOptionalAtomicString(optional [AtomicString] DOMString str);
>+ void methodWithOptionalAtomicString(optional [AtomString] DOMString str);
> void methodWithOptionalStringAndDefaultValue(optional DOMString str = "foo");
>- void methodWithOptionalAtomicStringAndDefaultValue(optional [AtomicString] DOMString str = "foo");
>+ void methodWithOptionalAtomicStringAndDefaultValue(optional [AtomString] DOMString str = "foo");
> void methodWithOptionalStringIsNull(optional DOMString str = null);
> void methodWithOptionalStringIsUndefined(optional DOMString str = "undefined");
>- void methodWithOptionalAtomicStringIsNull(optional [AtomicString] DOMString str = null);
>+ void methodWithOptionalAtomicStringIsNull(optional [AtomString] DOMString str = null);
> void methodWithOptionalStringIsEmptyString(optional DOMString str = "");
> void methodWithOptionalUSVStringIsEmptyString(optional USVString str = "");
>- void methodWithOptionalAtomicStringIsEmptyString(optional [AtomicString] DOMString str = "");
>+ void methodWithOptionalAtomicStringIsEmptyString(optional [AtomString] DOMString str = "");
> void methodWithOptionalDoubleIsNaN(optional unrestricted double number = NaN);
> void methodWithOptionalFloatIsNaN(optional unrestricted float number = NaN);
> void methodWithOptionalLongLong(optional long long number);
>@@ -344,7 +344,7 @@ enum TestConfidence { "high", "kinda-low" };
> 
> void methodWithAndWithoutNullableSequence(sequence<unsigned long> arrayArg, sequence<unsigned long>? nullableArrayArg);
> 
>- Element? getElementById([RequiresExistingAtomicString] DOMString elementId);
>+ Element? getElementById([RequiresExistingAtomString] DOMString elementId);
> 
> [CheckSecurityForNode] readonly attribute Document contentDocument;
> [CheckSecurityForNode, MayThrowException] SVGDocument getSVGDocument();
>diff --git a/Source/WebCore/contentextensions/ContentExtensionParser.cpp b/Source/WebCore/contentextensions/ContentExtensionParser.cpp
>index 7723a2fa59d3a98e3e6a167c7d26b229c235da76..067c9892c41f88d2cfd843492e4c9ba8688d571a 100644
>--- a/Source/WebCore/contentextensions/ContentExtensionParser.cpp
>+++ b/Source/WebCore/contentextensions/ContentExtensionParser.cpp
>@@ -231,7 +231,7 @@ static Expected<Trigger, std::error_code> loadTrigger(ExecState& exec, const JSO
> bool isValidCSSSelector(const String& selector)
> {
> ASSERT(isMainThread());
>- AtomicString::init();
>+ AtomString::init();
> QualifiedName::init();
> CSSParserContext context(HTMLQuirksMode);
> CSSParser parser(context);
>diff --git a/Source/WebCore/css/CSSComputedStyleDeclaration.cpp b/Source/WebCore/css/CSSComputedStyleDeclaration.cpp
>index 4bc064f776a25709dfa830f60f21adebcd70f924..aff6d3aba300bdf45a2062878f02f60468663b5b 100644
>--- a/Source/WebCore/css/CSSComputedStyleDeclaration.cpp
>+++ b/Source/WebCore/css/CSSComputedStyleDeclaration.cpp
>@@ -1731,7 +1731,7 @@ bool ComputedStyleExtractor::useFixedFontDefaultSize()
> return style->fontDescription().useFixedDefaultSize();
> }
> 
>-static CSSValueID identifierForFamily(const AtomicString& family)
>+static CSSValueID identifierForFamily(const AtomString& family)
> {
> if (family == cursiveFamily)
> return CSSValueCursive;
>@@ -1750,7 +1750,7 @@ static CSSValueID identifierForFamily(const AtomicString& family)
> return CSSValueInvalid;
> }
> 
>-static Ref<CSSPrimitiveValue> valueForFamily(const AtomicString& family)
>+static Ref<CSSPrimitiveValue> valueForFamily(const AtomString& family)
> {
> if (CSSValueID familyIdentifier = identifierForFamily(family))
> return CSSValuePool::singleton().createIdentifierValue(familyIdentifier);
>diff --git a/Source/WebCore/css/CSSCustomIdentValue.cpp b/Source/WebCore/css/CSSCustomIdentValue.cpp
>index 26d6e3bb0d031d67b4c0a5833f700f8cc3c3e2b6..01e48bddba7ba3be68403ea7513dcfc54853a3a5 100644
>--- a/Source/WebCore/css/CSSCustomIdentValue.cpp
>+++ b/Source/WebCore/css/CSSCustomIdentValue.cpp
>@@ -53,7 +53,7 @@ CSSCustomIdentValue::CSSCustomIdentValue(CSSPropertyID id)
> String CSSCustomIdentValue::customCSSText() const
> {
> if (isKnownPropertyID())
>- return getPropertyNameAtomicString(m_propertyId);
>+ return getPropertyNameAtomString(m_propertyId);
> StringBuilder builder;
> serializeIdentifier(m_string, builder);
> return builder.toString();
>diff --git a/Source/WebCore/css/CSSCustomIdentValue.h b/Source/WebCore/css/CSSCustomIdentValue.h
>index a562aed2da13a9fb3926e51abd9c0b6d899962ca..4abcf31ddaafbdeceac642e06ec73d8ef9863750 100644
>--- a/Source/WebCore/css/CSSCustomIdentValue.h
>+++ b/Source/WebCore/css/CSSCustomIdentValue.h
>@@ -62,7 +62,7 @@ private:
> CSSCustomIdentValue(const String&);
> CSSCustomIdentValue(CSSPropertyID);
> 
>- // FIXME: Change this to an AtomicString.
>+ // FIXME: Change this to an AtomString.
> String m_string;
> CSSPropertyID m_propertyId;
> };
>diff --git a/Source/WebCore/css/CSSCustomPropertyValue.h b/Source/WebCore/css/CSSCustomPropertyValue.h
>index bdaa74d55a0f871926df586b66bc02aac90e6783..3a52d04618fd6432452b2dda8347043949a081c8 100644
>--- a/Source/WebCore/css/CSSCustomPropertyValue.h
>+++ b/Source/WebCore/css/CSSCustomPropertyValue.h
>@@ -44,35 +44,35 @@ class CSSCustomPropertyValue final : public CSSValue {
> public:
> using VariantValue = Variant<Ref<CSSVariableReferenceValue>, CSSValueID, Ref<CSSVariableData>, Length, Ref<StyleImage>>;
> 
>- static Ref<CSSCustomPropertyValue> createUnresolved(const AtomicString& name, Ref<CSSVariableReferenceValue>&& value)
>+ static Ref<CSSCustomPropertyValue> createUnresolved(const AtomString& name, Ref<CSSVariableReferenceValue>&& value)
> {
> return adoptRef(*new CSSCustomPropertyValue(name, { WTFMove(value) }));
> }
> 
>- static Ref<CSSCustomPropertyValue> createUnresolved(const AtomicString& name, CSSValueID value)
>+ static Ref<CSSCustomPropertyValue> createUnresolved(const AtomString& name, CSSValueID value)
> {
> return adoptRef(*new CSSCustomPropertyValue(name, { value }));
> }
> 
>- static Ref<CSSCustomPropertyValue> createWithID(const AtomicString& name, CSSValueID id)
>+ static Ref<CSSCustomPropertyValue> createWithID(const AtomString& name, CSSValueID id)
> {
> ASSERT(id == CSSValueInherit || id == CSSValueInitial || id == CSSValueUnset || id == CSSValueRevert || id == CSSValueInvalid);
> return adoptRef(*new CSSCustomPropertyValue(name, { id }));
> }
> 
>- static Ref<CSSCustomPropertyValue> createSyntaxAll(const AtomicString& name, Ref<CSSVariableData>&& value)
>+ static Ref<CSSCustomPropertyValue> createSyntaxAll(const AtomString& name, Ref<CSSVariableData>&& value)
> {
> return adoptRef(*new CSSCustomPropertyValue(name, { WTFMove(value) }));
> }
> 
>- static Ref<CSSCustomPropertyValue> createSyntaxLength(const AtomicString& name, Length value)
>+ static Ref<CSSCustomPropertyValue> createSyntaxLength(const AtomString& name, Length value)
> {
> ASSERT(!value.isUndefined());
> ASSERT(!value.isCalculated());
> return adoptRef(*new CSSCustomPropertyValue(name, { WTFMove(value) }));
> }
> 
>- static Ref<CSSCustomPropertyValue> createSyntaxImage(const AtomicString& name, Ref<StyleImage>&& value)
>+ static Ref<CSSCustomPropertyValue> createSyntaxImage(const AtomString& name, Ref<StyleImage>&& value)
> {
> return adoptRef(*new CSSCustomPropertyValue(name, { WTFMove(value) }));
> }
>@@ -84,7 +84,7 @@ public:
> 
> String customCSSText() const;
> 
>- const AtomicString& name() const { return m_name; }
>+ const AtomString& name() const { return m_name; }
> bool isResolved() const { return !WTF::holds_alternative<Ref<CSSVariableReferenceValue>>(m_value); }
> bool isUnset() const { return WTF::holds_alternative<CSSValueID>(m_value) && WTF::get<CSSValueID>(m_value) == CSSValueUnset; }
> bool isInvalid() const { return WTF::holds_alternative<CSSValueID>(m_value) && WTF::get<CSSValueID>(m_value) == CSSValueInvalid; }
>@@ -95,7 +95,7 @@ public:
> bool equals(const CSSCustomPropertyValue& other) const;
> 
> private:
>- CSSCustomPropertyValue(const AtomicString& name, VariantValue&& value)
>+ CSSCustomPropertyValue(const AtomString& name, VariantValue&& value)
> : CSSValue(CustomPropertyClass)
> , m_name(name)
> , m_value(WTFMove(value))
>@@ -125,7 +125,7 @@ private:
> WTF::visit(visitor, other.m_value);
> }
> 
>- const AtomicString m_name;
>+ const AtomString m_name;
> VariantValue m_value;
> 
> mutable String m_stringValue;
>diff --git a/Source/WebCore/css/CSSFontFaceSet.cpp b/Source/WebCore/css/CSSFontFaceSet.cpp
>index 0a8cf0939d6916fe20b9d8bc9d911aedbca5a9c0..05e3a3f6e21bc9281785569a14aa50ff52e4a270 100644
>--- a/Source/WebCore/css/CSSFontFaceSet.cpp
>+++ b/Source/WebCore/css/CSSFontFaceSet.cpp
>@@ -351,8 +351,8 @@ ExceptionOr<Vector<std::reference_wrapper<CSSFontFace>>> CSSFontFaceSet::matchin
> return Exception { SyntaxError };
> CSSValueList& familyList = downcast<CSSValueList>(*family);
> 
>- HashSet<AtomicString> uniqueFamilies;
>- Vector<AtomicString> familyOrder;
>+ HashSet<AtomString> uniqueFamilies;
>+ Vector<AtomString> familyOrder;
> for (auto& family : familyList) {
> auto& primitive = downcast<CSSPrimitiveValue>(family.get());
> if (!primitive.isFontFamily())
>@@ -402,7 +402,7 @@ ExceptionOr<bool> CSSFontFaceSet::check(const String& font, const String& text)
> return true;
> }
> 
>-CSSSegmentedFontFace* CSSFontFaceSet::fontFace(FontSelectionRequest request, const AtomicString& family)
>+CSSSegmentedFontFace* CSSFontFaceSet::fontFace(FontSelectionRequest request, const AtomString& family)
> {
> auto iterator = m_facesLookupTable.find(family);
> if (iterator == m_facesLookupTable.end())
>diff --git a/Source/WebCore/css/CSSFontFaceSet.h b/Source/WebCore/css/CSSFontFaceSet.h
>index 795d0a86275b0149aef4cc14e88ea30de713f050..69c18568a2906d7e3254bc92509bc71b6b4eeaa7 100644
>--- a/Source/WebCore/css/CSSFontFaceSet.h
>+++ b/Source/WebCore/css/CSSFontFaceSet.h
>@@ -68,7 +68,7 @@ public:
> 
> ExceptionOr<bool> check(const String& font, const String& text);
> 
>- CSSSegmentedFontFace* fontFace(FontSelectionRequest, const AtomicString& family);
>+ CSSSegmentedFontFace* fontFace(FontSelectionRequest, const AtomString& family);
> 
> enum class Status { Loading, Loaded };
> Status status() const { return m_status; }
>diff --git a/Source/WebCore/css/CSSFontFaceSource.h b/Source/WebCore/css/CSSFontFaceSource.h
>index 2a6e4aafc496a1ef8cbaed896892b56f72117030..291b248092637fcb4c7708f45377760918ed4d35 100644
>--- a/Source/WebCore/css/CSSFontFaceSource.h
>+++ b/Source/WebCore/css/CSSFontFaceSource.h
>@@ -29,7 +29,7 @@
> #include "CachedResourceHandle.h"
> #include <JavaScriptCore/ArrayBufferView.h>
> #include <wtf/WeakPtr.h>
>-#include <wtf/text/AtomicString.h>
>+#include <wtf/text/AtomString.h>
> 
> namespace WebCore {
> 
>@@ -65,7 +65,7 @@ public:
> };
> Status status() const { return m_status; }
> 
>- const AtomicString& familyNameOrURI() const { return m_familyNameOrURI; }
>+ const AtomString& familyNameOrURI() const { return m_familyNameOrURI; }
> 
> void opportunisticallyStartFontDataURLLoading(CSSFontSelector&);
> 
>@@ -85,7 +85,7 @@ private:
> 
> void setStatus(Status);
> 
>- AtomicString m_familyNameOrURI; // URI for remote, built-in font name for local.
>+ AtomString m_familyNameOrURI; // URI for remote, built-in font name for local.
> CachedResourceHandle<CachedFont> m_font; // For remote fonts, a pointer to our cached resource.
> CSSFontFace& m_face; // Our owning font face.
> 
>diff --git a/Source/WebCore/css/CSSFontSelector.cpp b/Source/WebCore/css/CSSFontSelector.cpp
>index a7546857686ab890b2f788aef7829f8db72e60e3..db2e7998515ecf93d654e6e90ba32ed217cf59c4 100644
>--- a/Source/WebCore/css/CSSFontSelector.cpp
>+++ b/Source/WebCore/css/CSSFontSelector.cpp
>@@ -55,7 +55,7 @@
> #include "WebKitFontFamilyNames.h"
> #include <wtf/Ref.h>
> #include <wtf/SetForScope.h>
>-#include <wtf/text/AtomicString.h>
>+#include <wtf/text/AtomString.h>
> 
> namespace WebCore {
> 
>@@ -249,7 +249,7 @@ void CSSFontSelector::dispatchInvalidationCallbacks()
> client->fontsNeedUpdate(*this);
> }
> 
>-void CSSFontSelector::opportunisticallyStartFontDataURLLoading(const FontCascadeDescription& description, const AtomicString& familyName)
>+void CSSFontSelector::opportunisticallyStartFontDataURLLoading(const FontCascadeDescription& description, const AtomString& familyName)
> {
> const auto& segmentedFontFace = m_cssFontFaceSet->fontFace(description.fontSelectionRequest(), familyName);
> if (!segmentedFontFace)
>@@ -274,7 +274,7 @@ void CSSFontSelector::fontCacheInvalidated()
> dispatchInvalidationCallbacks();
> }
> 
>-static AtomicString resolveGenericFamily(Document* document, const FontDescription& fontDescription, const AtomicString& familyName)
>+static AtomString resolveGenericFamily(Document* document, const FontDescription& fontDescription, const AtomString& familyName)
> {
> auto platformResult = FontDescription::platformResolveGenericFamily(fontDescription.script(), fontDescription.locale(), familyName);
> if (!platformResult.isNull())
>@@ -304,7 +304,7 @@ static AtomicString resolveGenericFamily(Document* document, const FontDescripti
> return familyName;
> }
> 
>-FontRanges CSSFontSelector::fontRangesForFamily(const FontDescription& fontDescription, const AtomicString& familyName)
>+FontRanges CSSFontSelector::fontRangesForFamily(const FontDescription& fontDescription, const AtomString& familyName)
> {
> // If this ASSERT() fires, it usually means you forgot a document.updateStyleIfNeeded() somewhere.
> ASSERT(!m_buildIsUnderway || m_computingRootStyleFontCount);
>@@ -312,7 +312,7 @@ FontRanges CSSFontSelector::fontRangesForFamily(const FontDescription& fontDescr
> // FIXME: The spec (and Firefox) says user specified generic families (sans-serif etc.) should be resolved before the @font-face lookup too.
> bool resolveGenericFamilyFirst = familyName == standardFamily;
> 
>- AtomicString familyForLookup = resolveGenericFamilyFirst ? resolveGenericFamily(m_document.get(), fontDescription, familyName) : familyName;
>+ AtomString familyForLookup = resolveGenericFamilyFirst ? resolveGenericFamily(m_document.get(), fontDescription, familyName) : familyName;
> auto* face = m_cssFontFaceSet->fontFace(fontDescription.fontSelectionRequest(), familyForLookup);
> if (face) {
> if (RuntimeEnabledFeatures::sharedFeatures().webAPIStatisticsEnabled()) {
>diff --git a/Source/WebCore/css/CSSFontSelector.h b/Source/WebCore/css/CSSFontSelector.h
>index 9c31b36a71577eadac0c32b016fed1a43bacc1c0..a4420706e606304a5c0e99f7bb1acca32355e527 100644
>--- a/Source/WebCore/css/CSSFontSelector.h
>+++ b/Source/WebCore/css/CSSFontSelector.h
>@@ -58,7 +58,7 @@ public:
> unsigned version() const final { return m_version; }
> unsigned uniqueId() const final { return m_uniqueId; }
> 
>- FontRanges fontRangesForFamily(const FontDescription&, const AtomicString&) final;
>+ FontRanges fontRangesForFamily(const FontDescription&, const AtomString&) final;
> size_t fallbackFontCount() final;
> RefPtr fallbackFontAt(const FontDescription&, size_t) final;
> 
>@@ -91,7 +91,7 @@ private:
> 
> void dispatchInvalidationCallbacks();
> 
>- void opportunisticallyStartFontDataURLLoading(const FontCascadeDescription&, const AtomicString& family) final;
>+ void opportunisticallyStartFontDataURLLoading(const FontCascadeDescription&, const AtomString& family) final;
> 
> void fontModified() final;
> 
>diff --git a/Source/WebCore/css/CSSImageValue.h b/Source/WebCore/css/CSSImageValue.h
>index 59bb71c41ec66ecc3f3b4b737f748163b86a91bd..7e6bbb95145325268364c57cb5676223714b4b76 100644
>--- a/Source/WebCore/css/CSSImageValue.h
>+++ b/Source/WebCore/css/CSSImageValue.h
>@@ -56,7 +56,7 @@ public:
> 
> bool knownToBeOpaque(const RenderElement&) const;
> 
>- void setInitiator(const AtomicString& name) { m_initiatorName = name; }
>+ void setInitiator(const AtomString& name) { m_initiatorName = name; }
> 
> private:
> CSSImageValue(URL&&, LoadedFromOpaqueSource);
>@@ -65,7 +65,7 @@ private:
> URL m_url;
> CachedResourceHandle<CachedImage> m_cachedImage;
> bool m_accessedImage;
>- AtomicString m_initiatorName;
>+ AtomString m_initiatorName;
> LoadedFromOpaqueSource m_loadedFromOpaqueSource { LoadedFromOpaqueSource::No };
> };
> 
>diff --git a/Source/WebCore/css/CSSKeyframesRule.cpp b/Source/WebCore/css/CSSKeyframesRule.cpp
>index 632a547a92d987368214f14ab476ad6649346ea2..c909832da0e5190253513a3983191a7c2f393005 100644
>--- a/Source/WebCore/css/CSSKeyframesRule.cpp
>+++ b/Source/WebCore/css/CSSKeyframesRule.cpp
>@@ -36,13 +36,13 @@
> 
> namespace WebCore {
> 
>-StyleRuleKeyframes::StyleRuleKeyframes(const AtomicString& name)
>+StyleRuleKeyframes::StyleRuleKeyframes(const AtomString& name)
> : StyleRuleBase(Keyframes)
> , m_name(name)
> {
> }
> 
>-StyleRuleKeyframes::StyleRuleKeyframes(const AtomicString& name, std::unique_ptr<DeferredStyleGroupRuleList>&& deferredRules)
>+StyleRuleKeyframes::StyleRuleKeyframes(const AtomString& name, std::unique_ptr<DeferredStyleGroupRuleList>&& deferredRules)
> : StyleRuleBase(Keyframes)
> , m_name(name)
> , m_deferredRules(WTFMove(deferredRules))
>diff --git a/Source/WebCore/css/CSSKeyframesRule.h b/Source/WebCore/css/CSSKeyframesRule.h
>index dd075957e9302d8ccc864ee48e9941b7ba51a1de..280b6cba9c64a91350a389f751525cbd91c26073 100644
>--- a/Source/WebCore/css/CSSKeyframesRule.h
>+++ b/Source/WebCore/css/CSSKeyframesRule.h
>@@ -29,7 +29,7 @@
> #include "StyleRule.h"
> #include <memory>
> #include <wtf/Forward.h>
>-#include <wtf/text/AtomicString.h>
>+#include <wtf/text/AtomString.h>
> 
> namespace WebCore {
> 
>@@ -39,8 +39,8 @@ class CSSKeyframeRule;
> 
> class StyleRuleKeyframes final : public StyleRuleBase {
> public:
>- static Ref<StyleRuleKeyframes> create(const AtomicString& name) { return adoptRef(*new StyleRuleKeyframes(name)); }
>- static Ref<StyleRuleKeyframes> create(const AtomicString& name, std::unique_ptr<DeferredStyleGroupRuleList>&& deferredRules) { return adoptRef(*new StyleRuleKeyframes(name, WTFMove(deferredRules))); }
>+ static Ref<StyleRuleKeyframes> create(const AtomString& name) { return adoptRef(*new StyleRuleKeyframes(name)); }
>+ static Ref<StyleRuleKeyframes> create(const AtomString& name, std::unique_ptr<DeferredStyleGroupRuleList>&& deferredRules) { return adoptRef(*new StyleRuleKeyframes(name, WTFMove(deferredRules))); }
> 
> ~StyleRuleKeyframes();
> 
>@@ -54,22 +54,22 @@ public:
> void wrapperAppendKeyframe(Ref<StyleRuleKeyframe>&&);
> void wrapperRemoveKeyframe(unsigned);
> 
>- const AtomicString& name() const { return m_name; }
>- void setName(const AtomicString& name) { m_name = name; }
>+ const AtomString& name() const { return m_name; }
>+ void setName(const AtomString& name) { m_name = name; }
> 
> size_t findKeyframeIndex(const String& key) const;
> 
> Ref<StyleRuleKeyframes> copy() const { return adoptRef(*new StyleRuleKeyframes(*this)); }
> 
> private:
>- StyleRuleKeyframes(const AtomicString&);
>- StyleRuleKeyframes(const AtomicString&, std::unique_ptr<DeferredStyleGroupRuleList>&&);
>+ StyleRuleKeyframes(const AtomString&);
>+ StyleRuleKeyframes(const AtomString&, std::unique_ptr<DeferredStyleGroupRuleList>&&);
> StyleRuleKeyframes(const StyleRuleKeyframes&);
> 
> void parseDeferredRulesIfNeeded() const;
> 
> mutable Vector<Ref<StyleRuleKeyframe>> m_keyframes;
>- AtomicString m_name;
>+ AtomString m_name;
> 
> mutable std::unique_ptr<DeferredStyleGroupRuleList> m_deferredRules;
> };
>diff --git a/Source/WebCore/css/CSSNamespaceRule.cpp b/Source/WebCore/css/CSSNamespaceRule.cpp
>index 3d3ec6ff07d25b8b1db0fa477e6dff93bf5cba47..3b933b8764596f018feae397cd60b61406c38f0c 100644
>--- a/Source/WebCore/css/CSSNamespaceRule.cpp
>+++ b/Source/WebCore/css/CSSNamespaceRule.cpp
>@@ -40,12 +40,12 @@ CSSNamespaceRule::CSSNamespaceRule(StyleRuleNamespace& namespaceRule, CSSStyleSh
> 
> CSSNamespaceRule::~CSSNamespaceRule() = default;
> 
>-AtomicString CSSNamespaceRule::namespaceURI() const
>+AtomString CSSNamespaceRule::namespaceURI() const
> {
> return m_namespaceRule->uri();
> }
> 
>-AtomicString CSSNamespaceRule::prefix() const
>+AtomString CSSNamespaceRule::prefix() const
> {
> return m_namespaceRule->prefix();
> }
>diff --git a/Source/WebCore/css/CSSNamespaceRule.h b/Source/WebCore/css/CSSNamespaceRule.h
>index cd7004321e67ce11990d756a88b889dfb7a59231..11f6f9298bc141d8d1e36bbd0666615ca466da2c 100644
>--- a/Source/WebCore/css/CSSNamespaceRule.h
>+++ b/Source/WebCore/css/CSSNamespaceRule.h
>@@ -37,8 +37,8 @@ public:
> 
> virtual ~CSSNamespaceRule();
> 
>- AtomicString namespaceURI() const;
>- AtomicString prefix() const;
>+ AtomString namespaceURI() const;
>+ AtomString prefix() const;
> 
> private:
> CSSNamespaceRule(StyleRuleNamespace&, CSSStyleSheet*);
>diff --git a/Source/WebCore/css/CSSPrimitiveValue.cpp b/Source/WebCore/css/CSSPrimitiveValue.cpp
>index 8e4f21fadd5b7e70d187e5fda62053d49ba2c9f0..91168e7710ab2d1335aff2a89c5a36cf033ebc5a 100644
>--- a/Source/WebCore/css/CSSPrimitiveValue.cpp
>+++ b/Source/WebCore/css/CSSPrimitiveValue.cpp
>@@ -255,18 +255,18 @@ unsigned short CSSPrimitiveValue::primitiveType() const
> return CSSPrimitiveValue::CSS_UNKNOWN;
> }
> 
>-static const AtomicString& propertyName(CSSPropertyID propertyID)
>+static const AtomString& propertyName(CSSPropertyID propertyID)
> {
> ASSERT_ARG(propertyID, (propertyID >= firstCSSProperty && propertyID < firstCSSProperty + numCSSProperties));
> 
>- return getPropertyNameAtomicString(propertyID);
>+ return getPropertyNameAtomString(propertyID);
> }
> 
>-static const AtomicString& valueName(CSSValueID valueID)
>+static const AtomString& valueName(CSSValueID valueID)
> {
> ASSERT_ARG(valueID, (valueID >= firstCSSValueKeyword && valueID <= lastCSSValueKeyword));
> 
>- return getValueNameAtomicString(valueID);
>+ return getValueNameAtomString(valueID);
> }
> 
> CSSPrimitiveValue::CSSPrimitiveValue(CSSValueID valueID)
>diff --git a/Source/WebCore/css/CSSSelector.cpp b/Source/WebCore/css/CSSSelector.cpp
>index f365a85e74db82657fbab888c0635541c0b6006f..efe48ef06e9110754f7940749811983ec040626f 100644
>--- a/Source/WebCore/css/CSSSelector.cpp
>+++ b/Source/WebCore/css/CSSSelector.cpp
>@@ -33,7 +33,7 @@
> #include <wtf/Assertions.h>
> #include <wtf/StdLibExtras.h>
> #include <wtf/Vector.h>
>-#include <wtf/text/AtomicStringHash.h>
>+#include <wtf/text/AtomStringHash.h>
> #include <wtf/text/StringBuilder.h>
> 
> namespace WebCore {
>@@ -63,8 +63,8 @@ CSSSelector::CSSSelector(const QualifiedName& tagQName, bool tagIsForNamespaceRu
> , m_destructorHasBeenCalled(false)
> #endif
> {
>- const AtomicString& tagLocalName = tagQName.localName();
>- const AtomicString tagLocalNameASCIILowercase = tagLocalName.convertToASCIILowercase();
>+ const AtomString& tagLocalName = tagQName.localName();
>+ const AtomString tagLocalNameASCIILowercase = tagLocalName.convertToASCIILowercase();
> 
> if (tagLocalName == tagLocalNameASCIILowercase) {
> m_data.m_tagQName = tagQName.impl();
>@@ -82,7 +82,7 @@ void CSSSelector::createRareData()
> if (m_hasRareData)
> return;
> // Move the value to the rare data stucture.
>- AtomicString value { adoptRef(m_data.m_value) };
>+ AtomString value { adoptRef(m_data.m_value) };
> m_data.m_rareData = &RareData::create(WTFMove(value)).leakRef();
> m_hasRareData = true;
> }
>@@ -373,7 +373,7 @@ static void appendPseudoClassFunctionTail(StringBuilder& str, const CSSSelector*
> 
> }
> 
>-static void appendLangArgumentList(StringBuilder& str, const Vector<AtomicString>& argumentList)
>+static void appendLangArgumentList(StringBuilder& str, const Vector<AtomString>& argumentList)
> {
> unsigned argumentListSize = argumentList.size();
> for (unsigned i = 0; i < argumentListSize; ++i) {
>@@ -671,7 +671,7 @@ String CSSSelector::selectorText(const String& rightSide) const
> }
> } else if (cs->isAttributeSelector()) {
> str.append('[');
>- const AtomicString& prefix = cs->attribute().prefix();
>+ const AtomString& prefix = cs->attribute().prefix();
> if (!prefix.isEmpty()) {
> str.append(prefix);
> str.append('|');
>@@ -759,13 +759,13 @@ void CSSSelector::setAttribute(const QualifiedName& value, bool convertToLowerca
> m_caseInsensitiveAttributeValueMatching = matchType == CaseInsensitive;
> }
> 
>-void CSSSelector::setArgument(const AtomicString& value)
>+void CSSSelector::setArgument(const AtomString& value)
> {
> createRareData();
> m_data.m_rareData->m_argument = value;
> }
> 
>-void CSSSelector::setLangArgumentList(std::unique_ptr<Vector<AtomicString>> argumentList)
>+void CSSSelector::setLangArgumentList(std::unique_ptr<Vector<AtomString>> argumentList)
> {
> createRareData();
> m_data.m_rareData->m_langArgumentList = WTFMove(argumentList);
>@@ -802,7 +802,7 @@ int CSSSelector::nthB() const
> return m_data.m_rareData->m_b;
> }
> 
>-CSSSelector::RareData::RareData(AtomicString&& value)
>+CSSSelector::RareData::RareData(AtomString&& value)
> : m_matchingValue(value)
> , m_serializingValue(value)
> , m_a(0)
>diff --git a/Source/WebCore/css/CSSSelector.h b/Source/WebCore/css/CSSSelector.h
>index 544cc2cd58abea8044435b16485c23858853ea55..e591c6ca48b1868527ade4129300347e07ece1a9 100644
>--- a/Source/WebCore/css/CSSSelector.h
>+++ b/Source/WebCore/css/CSSSelector.h
>@@ -231,23 +231,23 @@ namespace WebCore {
> const CSSSelector* tagHistory() const { return m_isLastInTagHistory ? 0 : const_cast<CSSSelector*>(this + 1); }
> 
> const QualifiedName& tagQName() const;
>- const AtomicString& tagLowercaseLocalName() const;
>+ const AtomString& tagLowercaseLocalName() const;
> 
>- const AtomicString& value() const;
>- const AtomicString& serializingValue() const;
>+ const AtomString& value() const;
>+ const AtomString& serializingValue() const;
> const QualifiedName& attribute() const;
>- const AtomicString& attributeCanonicalLocalName() const;
>- const AtomicString& argument() const { return m_hasRareData ? m_data.m_rareData->m_argument : nullAtom(); }
>+ const AtomString& attributeCanonicalLocalName() const;
>+ const AtomString& argument() const { return m_hasRareData ? m_data.m_rareData->m_argument : nullAtom(); }
> bool attributeValueMatchingIsCaseInsensitive() const;
>- const Vector<AtomicString>* langArgumentList() const { return m_hasRareData ? m_data.m_rareData->m_langArgumentList.get() : nullptr; }
>+ const Vector<AtomString>* langArgumentList() const { return m_hasRareData ? m_data.m_rareData->m_langArgumentList.get() : nullptr; }
> const CSSSelectorList* selectorList() const { return m_hasRareData ? m_data.m_rareData->m_selectorList.get() : nullptr; }
> 
>- void setValue(const AtomicString&, bool matchLowerCase = false);
>+ void setValue(const AtomString&, bool matchLowerCase = false);
> 
> void setAttribute(const QualifiedName&, bool convertToLowercase, AttributeMatchType);
> void setNth(int a, int b);
>- void setArgument(const AtomicString&);
>- void setLangArgumentList(std::unique_ptr<Vector<AtomicString>>);
>+ void setArgument(const AtomString&);
>+ void setLangArgumentList(std::unique_ptr<Vector<AtomString>>);
> void setSelectorList(std::unique_ptr<CSSSelectorList>);
> 
> bool matchNth(int count) const;
>@@ -341,7 +341,7 @@ namespace WebCore {
> CSSSelector& operator=(const CSSSelector&);
> 
> struct RareData : public RefCounted<RareData> {
>- static Ref<RareData> create(AtomicString&& value) { return adoptRef(*new RareData(WTFMove(value))); }
>+ static Ref<RareData> create(AtomString&& value) { return adoptRef(*new RareData(WTFMove(value))); }
> ~RareData();
> 
> bool matchNth(int count);
>@@ -349,24 +349,24 @@ namespace WebCore {
> // For quirks mode, class and id are case-insensitive. In the case where uppercase
> // letters are used in quirks mode, |m_matchingValue| holds the lowercase class/id
> // and |m_serializingValue| holds the original string.
>- AtomicString m_matchingValue;
>- AtomicString m_serializingValue;
>+ AtomString m_matchingValue;
>+ AtomString m_serializingValue;
> 
> int m_a; // Used for :nth-*
> int m_b; // Used for :nth-*
> QualifiedName m_attribute; // used for attribute selector
>- AtomicString m_attributeCanonicalLocalName;
>- AtomicString m_argument; // Used for :contains and :nth-*
>- std::unique_ptr<Vector<AtomicString>> m_langArgumentList; // Used for :lang arguments.
>+ AtomString m_attributeCanonicalLocalName;
>+ AtomString m_argument; // Used for :contains and :nth-*
>+ std::unique_ptr<Vector<AtomString>> m_langArgumentList; // Used for :lang arguments.
> std::unique_ptr<CSSSelectorList> m_selectorList; // Used for :matches() and :not().
> 
> private:
>- RareData(AtomicString&& value);
>+ RareData(AtomString&& value);
> };
> void createRareData();
> 
> struct NameWithCase : public RefCounted<NameWithCase> {
>- NameWithCase(const QualifiedName& originalName, const AtomicString& lowercaseName)
>+ NameWithCase(const QualifiedName& originalName, const AtomString& lowercaseName)
> : m_originalName(originalName)
> , m_lowercaseLocalName(lowercaseName)
> {
>@@ -374,12 +374,12 @@ namespace WebCore {
> }
> 
> const QualifiedName m_originalName;
>- const AtomicString m_lowercaseLocalName;
>+ const AtomString m_lowercaseLocalName;
> };
> 
> union DataUnion {
> DataUnion() : m_value(0) { }
>- AtomicStringImpl* m_value;
>+ AtomStringImpl* m_value;
> QualifiedName::QualifiedNameImpl* m_tagQName;
> RareData* m_rareData;
> NameWithCase* m_nameWithCase;
>@@ -393,7 +393,7 @@ inline const QualifiedName& CSSSelector::attribute() const
> return m_data.m_rareData->m_attribute;
> }
> 
>-inline const AtomicString& CSSSelector::attributeCanonicalLocalName() const
>+inline const AtomString& CSSSelector::attributeCanonicalLocalName() const
> {
> ASSERT(isAttributeSelector());
> ASSERT(m_hasRareData);
>@@ -455,10 +455,10 @@ inline bool CSSSelector::isAttributeSelector() const
> || match() == CSSSelector::End;
> }
> 
>-inline void CSSSelector::setValue(const AtomicString& value, bool matchLowerCase)
>+inline void CSSSelector::setValue(const AtomString& value, bool matchLowerCase)
> {
> ASSERT(match() != Tag);
>- AtomicString matchingValue = matchLowerCase ? value.convertToASCIILowercase() : value;
>+ AtomString matchingValue = matchLowerCase ? value.convertToASCIILowercase() : value;
> if (!m_hasRareData && matchingValue != value)
> createRareData();
> 
>@@ -554,31 +554,31 @@ inline const QualifiedName& CSSSelector::tagQName() const
> return *reinterpret_cast<const QualifiedName*>(&m_data.m_tagQName);
> }
> 
>-inline const AtomicString& CSSSelector::tagLowercaseLocalName() const
>+inline const AtomString& CSSSelector::tagLowercaseLocalName() const
> {
> if (m_hasNameWithCase)
> return m_data.m_nameWithCase->m_lowercaseLocalName;
> return m_data.m_tagQName->m_localName;
> }
> 
>-inline const AtomicString& CSSSelector::value() const
>+inline const AtomString& CSSSelector::value() const
> {
> ASSERT(match() != Tag);
> if (m_hasRareData)
> return m_data.m_rareData->m_matchingValue;
> 
>- // AtomicString is really just an AtomicStringImpl* so the cast below is safe.
>- return *reinterpret_cast<const AtomicString*>(&m_data.m_value);
>+ // AtomString is really just an AtomStringImpl* so the cast below is safe.
>+ return *reinterpret_cast<const AtomString*>(&m_data.m_value);
> }
> 
>-inline const AtomicString& CSSSelector::serializingValue() const
>+inline const AtomString& CSSSelector::serializingValue() const
> {
> ASSERT(match() != Tag);
> if (m_hasRareData)
> return m_data.m_rareData->m_serializingValue;
> 
>- // AtomicString is really just an AtomicStringImpl* so the cast below is safe.
>- return *reinterpret_cast<const AtomicString*>(&m_data.m_value);
>+ // AtomString is really just an AtomStringImpl* so the cast below is safe.
>+ return *reinterpret_cast<const AtomString*>(&m_data.m_value);
> }
> 
> inline bool CSSSelector::attributeValueMatchingIsCaseInsensitive() const
>diff --git a/Source/WebCore/css/CSSStyleDeclaration.cpp b/Source/WebCore/css/CSSStyleDeclaration.cpp
>index a4f3481e3667c080f0454733a97c46d4ef64c3ab..2f69ef7df85854191aadd027acbe42bd3a57e225 100644
>--- a/Source/WebCore/css/CSSStyleDeclaration.cpp
>+++ b/Source/WebCore/css/CSSStyleDeclaration.cpp
>@@ -149,7 +149,7 @@ struct CSSPropertyInfo {
> bool hadPixelOrPosPrefix;
> };
> 
>-static CSSPropertyInfo parseJavaScriptCSSPropertyName(const AtomicString& propertyName)
>+static CSSPropertyInfo parseJavaScriptCSSPropertyName(const AtomString& propertyName)
> {
> using CSSPropertyInfoMap = HashMap<String, CSSPropertyInfo>;
> static NeverDestroyed<CSSPropertyInfoMap> propertyInfoCache;
>@@ -258,12 +258,12 @@ static CSSPropertyInfo parseJavaScriptCSSPropertyName(const AtomicString& proper
> 
> }
> 
>-CSSPropertyID CSSStyleDeclaration::getCSSPropertyIDFromJavaScriptPropertyName(const AtomicString& propertyName)
>+CSSPropertyID CSSStyleDeclaration::getCSSPropertyIDFromJavaScriptPropertyName(const AtomString& propertyName)
> {
> return parseJavaScriptCSSPropertyName(propertyName).propertyID;
> }
> 
>-Optional<Variant<String, double>> CSSStyleDeclaration::namedItem(const AtomicString& propertyName)
>+Optional<Variant<String, double>> CSSStyleDeclaration::namedItem(const AtomString& propertyName)
> {
> auto propertyInfo = parseJavaScriptCSSPropertyName(propertyName);
> if (!propertyInfo.propertyID)
>@@ -285,7 +285,7 @@ Optional<Variant<String, double>> CSSStyleDeclaration::namedItem(const AtomicStr
> return Variant<String, double> { value->cssText() };
> }
> 
>-ExceptionOr<void> CSSStyleDeclaration::setNamedItem(const AtomicString& propertyName, String value, bool& propertySupported)
>+ExceptionOr<void> CSSStyleDeclaration::setNamedItem(const AtomString& propertyName, String value, bool& propertySupported)
> {
> auto propertyInfo = parseJavaScriptCSSPropertyName(propertyName);
> if (!propertyInfo.propertyID) {
>@@ -314,10 +314,10 @@ ExceptionOr<void> CSSStyleDeclaration::setNamedItem(const AtomicString& property
> return { };
> }
> 
>-Vector<AtomicString> CSSStyleDeclaration::supportedPropertyNames() const
>+Vector<AtomString> CSSStyleDeclaration::supportedPropertyNames() const
> {
> static unsigned numNames = 0;
>- static const AtomicString* const cssPropertyNames = [] {
>+ static const AtomString* const cssPropertyNames = [] {
> String names[numCSSProperties];
> for (int i = 0; i < numCSSProperties; ++i) {
> CSSPropertyID id = static_cast<CSSPropertyID>(firstCSSProperty + i);
>@@ -325,13 +325,13 @@ Vector<AtomicString> CSSStyleDeclaration::supportedPropertyNames() const
> names[numNames++] = getJSPropertyName(id);
> }
> std::sort(&names[0], &names[numNames], WTF::codePointCompareLessThan);
>- auto* identifiers = new AtomicString[numNames];
>+ auto* identifiers = new AtomString[numNames];
> for (unsigned i = 0; i < numNames; ++i)
> identifiers[i] = names[i];
> return identifiers;
> }();
> 
>- Vector<AtomicString> result;
>+ Vector<AtomString> result;
> result.reserveInitialCapacity(numNames);
> 
> for (unsigned i = 0; i < numNames; ++i)
>diff --git a/Source/WebCore/css/CSSStyleDeclaration.h b/Source/WebCore/css/CSSStyleDeclaration.h
>index 358d7d6e3f7319ec85e2e6f526d007bec09339c1..f987d1e9cbf6f7e36c54c43b8f7411b574a2300c 100644
>--- a/Source/WebCore/css/CSSStyleDeclaration.h
>+++ b/Source/WebCore/css/CSSStyleDeclaration.h
>@@ -73,11 +73,11 @@ public:
> virtual CSSStyleSheet* parentStyleSheet() const { return nullptr; }
> 
> // Bindings support.
>- Optional<Variant<String, double>> namedItem(const AtomicString&);
>- ExceptionOr<void> setNamedItem(const AtomicString& name, String value, bool& propertySupported);
>- Vector<AtomicString> supportedPropertyNames() const;
>+ Optional<Variant<String, double>> namedItem(const AtomString&);
>+ ExceptionOr<void> setNamedItem(const AtomString& name, String value, bool& propertySupported);
>+ Vector<AtomString> supportedPropertyNames() const;
> 
>- static CSSPropertyID getCSSPropertyIDFromJavaScriptPropertyName(const AtomicString&);
>+ static CSSPropertyID getCSSPropertyIDFromJavaScriptPropertyName(const AtomString&);
> protected:
> CSSStyleDeclaration() = default;
> };
>diff --git a/Source/WebCore/css/CSSStyleSheet.h b/Source/WebCore/css/CSSStyleSheet.h
>index 23768e50fbc8c7cd041ab0263f93d1337767e38a..4d0cff9a85a674bcd077437228c0a4b0bcc50929 100644
>--- a/Source/WebCore/css/CSSStyleSheet.h
>+++ b/Source/WebCore/css/CSSStyleSheet.h
>@@ -25,7 +25,7 @@
> #include <memory>
> #include <wtf/Noncopyable.h>
> #include <wtf/TypeCasts.h>
>-#include <wtf/text/AtomicStringHash.h>
>+#include <wtf/text/AtomStringHash.h>
> #include <wtf/text/TextPosition.h>
> 
> namespace WebCore {
>diff --git a/Source/WebCore/css/CSSValue.h b/Source/WebCore/css/CSSValue.h
>index 7d4b118fb7be1b20f34c50ddeab84ff6d210efbe..f885ebd9307d26d11f38bfd9d80423b1c8cf14fc 100644
>--- a/Source/WebCore/css/CSSValue.h
>+++ b/Source/WebCore/css/CSSValue.h
>@@ -279,7 +279,7 @@ inline bool compareCSSValue(const Ref<CSSValueType>& first, const Ref<CSSValueTy
> return first.get().equals(second);
> }
> 
>-typedef HashMap<AtomicString, RefPtr<CSSCustomPropertyValue>> CustomPropertyValueMap;
>+typedef HashMap<AtomString, RefPtr<CSSCustomPropertyValue>> CustomPropertyValueMap;
> 
> } // namespace WebCore
> 
>diff --git a/Source/WebCore/css/CSSValuePool.cpp b/Source/WebCore/css/CSSValuePool.cpp
>index fbd6b16eca9f1faafc64e873d49e647a6f2267ee..6947e05baf9dfb7af1db76472b8f69cff25f3a65 100644
>--- a/Source/WebCore/css/CSSValuePool.cpp
>+++ b/Source/WebCore/css/CSSValuePool.cpp
>@@ -131,7 +131,7 @@ Ref<CSSPrimitiveValue> CSSValuePool::createFontFamilyValue(const String& familyN
> }).iterator->value;
> }
> 
>-RefPtr<CSSValueList> CSSValuePool::createFontFaceValue(const AtomicString& string)
>+RefPtr<CSSValueList> CSSValuePool::createFontFaceValue(const AtomString& string)
> {
> // Remove one entry at random if the cache grows too large.
> // FIXME: Use TinyLRUCache instead?
>diff --git a/Source/WebCore/css/CSSValuePool.h b/Source/WebCore/css/CSSValuePool.h
>index a92be46a45b10e677ccb73aac47f36b0680936f7..e80e67684d568581db79553bf79ed0201725c556 100644
>--- a/Source/WebCore/css/CSSValuePool.h
>+++ b/Source/WebCore/css/CSSValuePool.h
>@@ -37,7 +37,7 @@
> #include <wtf/HashMap.h>
> #include <wtf/NeverDestroyed.h>
> #include <wtf/RefPtr.h>
>-#include <wtf/text/AtomicStringHash.h>
>+#include <wtf/text/AtomStringHash.h>
> 
> namespace WebCore {
> 
>@@ -50,7 +50,7 @@ class CSSValuePool {
> public:
> static CSSValuePool& singleton();
> 
>- RefPtr<CSSValueList> createFontFaceValue(const AtomicString&);
>+ RefPtr<CSSValueList> createFontFaceValue(const AtomString&);
> Ref<CSSPrimitiveValue> createFontFamilyValue(const String&, FromSystemFontID = FromSystemFontID::No);
> Ref<CSSInheritedValue> createInheritedValue() { return m_inheritedValue.get(); }
> Ref<CSSInitialValue> createImplicitInitialValue() { return m_implicitInitialValue.get(); }
>@@ -74,7 +74,7 @@ private:
> typedef HashMap<Color, RefPtr<CSSPrimitiveValue>> ColorValueCache;
> ColorValueCache m_colorValueCache;
> 
>- typedef HashMap<AtomicString, RefPtr<CSSValueList>> FontFaceValueCache;
>+ typedef HashMap<AtomString, RefPtr<CSSValueList>> FontFaceValueCache;
> FontFaceValueCache m_fontFaceValueCache;
> 
> typedef HashMap<std::pair<String, bool>, RefPtr<CSSPrimitiveValue>> FontFamilyValueCache;
>diff --git a/Source/WebCore/css/CSSVariableData.cpp b/Source/WebCore/css/CSSVariableData.cpp
>index 604ca183434b658674d3d8c0729a41109158d99d..0cb1b19c9f02658603e8036324a19991f32b52d0 100644
>--- a/Source/WebCore/css/CSSVariableData.cpp
>+++ b/Source/WebCore/css/CSSVariableData.cpp
>@@ -34,7 +34,7 @@
> #include "CSSParserTokenRange.h"
> #include "CSSValuePool.h"
> #include "RenderStyle.h"
>-#include <wtf/text/AtomicStringHash.h>
>+#include <wtf/text/AtomStringHash.h>
> #include <wtf/text/StringBuilder.h>
> #include <wtf/text/StringView.h>
> 
>diff --git a/Source/WebCore/css/DocumentRuleSets.cpp b/Source/WebCore/css/DocumentRuleSets.cpp
>index a2ef908386be703a6fafe926c30a77f14bafd945..0cb0ffc5c2ba06f74d6dc07f70234ec2b02ff4c5 100644
>--- a/Source/WebCore/css/DocumentRuleSets.cpp
>+++ b/Source/WebCore/css/DocumentRuleSets.cpp
>@@ -174,7 +174,7 @@ void DocumentRuleSets::collectFeatures() const
> m_features.shrinkToFit();
> }
> 
>-static Vector<InvalidationRuleSet>* ensureInvalidationRuleSets(const AtomicString& key, HashMap<AtomicString, std::unique_ptr<Vector<InvalidationRuleSet>>>& ruleSetMap, const HashMap<AtomicString, std::unique_ptr<Vector<RuleFeature>>>& ruleFeatures)
>+static Vector<InvalidationRuleSet>* ensureInvalidationRuleSets(const AtomString& key, HashMap<AtomString, std::unique_ptr<Vector<InvalidationRuleSet>>>& ruleSetMap, const HashMap<AtomString, std::unique_ptr<Vector<RuleFeature>>>& ruleFeatures)
> {
> return ruleSetMap.ensure(key, [&] () -> std::unique_ptr<Vector<InvalidationRuleSet>> {
> auto* features = ruleFeatures.get(key);
>@@ -201,12 +201,12 @@ static Vector<InvalidationRuleSet>* ensureInvalidationRuleSets(const AtomicStrin
> }).iterator->value.get();
> }
> 
>-const Vector<InvalidationRuleSet>* DocumentRuleSets::classInvalidationRuleSets(const AtomicString& className) const
>+const Vector<InvalidationRuleSet>* DocumentRuleSets::classInvalidationRuleSets(const AtomString& className) const
> {
> return ensureInvalidationRuleSets(className, m_classInvalidationRuleSets, m_features.classRules);
> }
> 
>-const Vector<InvalidationRuleSet>* DocumentRuleSets::attributeInvalidationRuleSets(const AtomicString& attributeName) const
>+const Vector<InvalidationRuleSet>* DocumentRuleSets::attributeInvalidationRuleSets(const AtomString& attributeName) const
> {
> return ensureInvalidationRuleSets(attributeName, m_attributeInvalidationRuleSets, m_features.attributeRules);
> }
>diff --git a/Source/WebCore/css/DocumentRuleSets.h b/Source/WebCore/css/DocumentRuleSets.h
>index 1bf0649482c157bd0f76733c3db87413c2c9d4e4..2b16cffd997973b87165f9de238f65fa52ac806b 100644
>--- a/Source/WebCore/css/DocumentRuleSets.h
>+++ b/Source/WebCore/css/DocumentRuleSets.h
>@@ -59,8 +59,8 @@ public:
> RuleSet* sibling() const { return m_siblingRuleSet.get(); }
> RuleSet* uncommonAttribute() const { return m_uncommonAttributeRuleSet.get(); }
> 
>- const Vector<InvalidationRuleSet>* classInvalidationRuleSets(const AtomicString& className) const;
>- const Vector<InvalidationRuleSet>* attributeInvalidationRuleSets(const AtomicString& attributeName) const;
>+ const Vector<InvalidationRuleSet>* classInvalidationRuleSets(const AtomString& className) const;
>+ const Vector<InvalidationRuleSet>* attributeInvalidationRuleSets(const AtomString& attributeName) const;
> 
> bool hasComplexSelectorsForStyleAttribute() const;
> 
>@@ -89,8 +89,8 @@ private:
> mutable RuleFeatureSet m_features;
> mutable std::unique_ptr<RuleSet> m_siblingRuleSet;
> mutable std::unique_ptr<RuleSet> m_uncommonAttributeRuleSet;
>- mutable HashMap<AtomicString, std::unique_ptr<Vector<InvalidationRuleSet>>> m_classInvalidationRuleSets;
>- mutable HashMap<AtomicString, std::unique_ptr<Vector<InvalidationRuleSet>>> m_attributeInvalidationRuleSets;
>+ mutable HashMap<AtomString, std::unique_ptr<Vector<InvalidationRuleSet>>> m_classInvalidationRuleSets;
>+ mutable HashMap<AtomString, std::unique_ptr<Vector<InvalidationRuleSet>>> m_attributeInvalidationRuleSets;
> 
> mutable Optional<bool> m_cachedHasComplexSelectorsForStyleAttribute;
> 
>diff --git a/Source/WebCore/css/MediaFeatureNames.cpp b/Source/WebCore/css/MediaFeatureNames.cpp
>index ea4601164b85bf22e8b35201f9ebf86c2e5d0528..2f5b8b047395a2cbd755ac1cf534bfdcef571057 100644
>--- a/Source/WebCore/css/MediaFeatureNames.cpp
>+++ b/Source/WebCore/css/MediaFeatureNames.cpp
>@@ -24,7 +24,7 @@
> namespace WebCore {
> namespace MediaFeatureNames {
> 
>-#define DEFINE_MEDIAFEATURE_GLOBAL(name, string) LazyNeverDestroyed<const AtomicString> name;
>+#define DEFINE_MEDIAFEATURE_GLOBAL(name, string) LazyNeverDestroyed<const AtomString> name;
> CSS_MEDIAQUERY_NAMES_FOR_EACH_MEDIAFEATURE(DEFINE_MEDIAFEATURE_GLOBAL)
> #undef DEFINE_MEDIAFEATURE_GLOBAL
> 
>@@ -32,8 +32,8 @@ void init()
> {
> static bool initialized;
> if (!initialized) {
>- AtomicString::init();
>-#define INITIALIZE_GLOBAL(name, string) name.construct(string, AtomicString::ConstructFromLiteral);
>+ AtomString::init();
>+#define INITIALIZE_GLOBAL(name, string) name.construct(string, AtomString::ConstructFromLiteral);
> CSS_MEDIAQUERY_NAMES_FOR_EACH_MEDIAFEATURE(INITIALIZE_GLOBAL)
> #undef INITIALIZE_GLOBAL
> initialized = true;
>diff --git a/Source/WebCore/css/MediaFeatureNames.h b/Source/WebCore/css/MediaFeatureNames.h
>index 6b56455562f68f9b4fb2c59ebff002578eff43fa..d86e6646a99fc827c7211aea603540fc90dc5bb4 100644
>--- a/Source/WebCore/css/MediaFeatureNames.h
>+++ b/Source/WebCore/css/MediaFeatureNames.h
>@@ -21,7 +21,7 @@
> #pragma once
> 
> #include <wtf/NeverDestroyed.h>
>-#include <wtf/text/AtomicString.h>
>+#include <wtf/text/AtomString.h>
> 
> #if ENABLE(APPLICATION_MANIFEST)
> #define CSS_MEDIAQUERY_DISPLAY_MODE(macro) macro(displayMode, "display-mode")
>@@ -92,7 +92,7 @@
> namespace WebCore {
> namespace MediaFeatureNames {
> 
>-#define CSS_MEDIAQUERY_NAMES_DECLARE(name, string) extern LazyNeverDestroyed<const AtomicString> name;
>+#define CSS_MEDIAQUERY_NAMES_DECLARE(name, string) extern LazyNeverDestroyed<const AtomString> name;
> CSS_MEDIAQUERY_NAMES_FOR_EACH_MEDIAFEATURE(CSS_MEDIAQUERY_NAMES_DECLARE)
> #undef CSS_MEDIAQUERY_NAMES_DECLARE
> 
>diff --git a/Source/WebCore/css/MediaQueryEvaluator.cpp b/Source/WebCore/css/MediaQueryEvaluator.cpp
>index 6ee00de7f2797436355ae670f6efeda0b8f83b83..6cac9e1e36ad99acf8dabc09dff79f15ad8e2302 100644
>--- a/Source/WebCore/css/MediaQueryEvaluator.cpp
>+++ b/Source/WebCore/css/MediaQueryEvaluator.cpp
>@@ -74,9 +74,9 @@ static TextStream& operator<<(TextStream& ts, MediaFeaturePrefix op)
> #endif
> 
> typedef bool (*MediaQueryFunction)(CSSValue*, const CSSToLengthConversionData&, Frame&, MediaFeaturePrefix);
>-typedef HashMap<AtomicStringImpl*, MediaQueryFunction> MediaQueryFunctionMap;
>+typedef HashMap<AtomStringImpl*, MediaQueryFunction> MediaQueryFunctionMap;
> 
>-static bool isAccessibilitySettingsDependent(const AtomicString& mediaFeature)
>+static bool isAccessibilitySettingsDependent(const AtomString& mediaFeature)
> {
> return mediaFeature == MediaFeatureNames::invertedColors
> || mediaFeature == MediaFeatureNames::maxMonochrome
>@@ -85,7 +85,7 @@ static bool isAccessibilitySettingsDependent(const AtomicString& mediaFeature)
> || mediaFeature == MediaFeatureNames::prefersReducedMotion;
> }
> 
>-static bool isViewportDependent(const AtomicString& mediaFeature)
>+static bool isViewportDependent(const AtomString& mediaFeature)
> {
> return mediaFeature == MediaFeatureNames::width
> || mediaFeature == MediaFeatureNames::height
>@@ -99,7 +99,7 @@ static bool isViewportDependent(const AtomicString& mediaFeature)
> || mediaFeature == MediaFeatureNames::maxAspectRatio;
> }
> 
>-static bool isAppearanceDependent(const AtomicString& mediaFeature)
>+static bool isAppearanceDependent(const AtomString& mediaFeature)
> {
> return mediaFeature == MediaFeatureNames::prefersDarkInterface
> #if ENABLE(DARK_MODE_CSS)
>@@ -842,7 +842,7 @@ static bool displayModeEvaluate(CSSValue* value, const CSSToLengthConversionData
> #endif // ENABLE(APPLICATION_MANIFEST)
> 
> // Use this function instead of calling add directly to avoid inlining.
>-static void add(MediaQueryFunctionMap& map, AtomicStringImpl* key, MediaQueryFunction value)
>+static void add(MediaQueryFunctionMap& map, AtomStringImpl* key, MediaQueryFunction value)
> {
> map.add(key, value);
> }
>diff --git a/Source/WebCore/css/MediaQueryExpression.cpp b/Source/WebCore/css/MediaQueryExpression.cpp
>index 08be05526057fc95d598da8b8d7ad5ed993c4c6f..4373e8b3f172d8a025990657b2425d58993e10d3 100644
>--- a/Source/WebCore/css/MediaQueryExpression.cpp
>+++ b/Source/WebCore/css/MediaQueryExpression.cpp
>@@ -39,7 +39,7 @@
> 
> namespace WebCore {
> 
>-static inline bool featureWithValidIdent(const AtomicString& mediaFeature, const CSSPrimitiveValue& value, const MediaQueryParserContext& context)
>+static inline bool featureWithValidIdent(const AtomString& mediaFeature, const CSSPrimitiveValue& value, const MediaQueryParserContext& context)
> {
> if (value.primitiveType() != CSSPrimitiveValue::UnitType::CSS_IDENT)
> return false;
>@@ -132,7 +132,7 @@ static inline bool featureWithZeroOrOne(const String& mediaFeature, const CSSPri
> return mediaFeature == MediaFeatureNames::grid;
> }
> 
>-static inline bool isAspectRatioFeature(const AtomicString& mediaFeature)
>+static inline bool isAspectRatioFeature(const AtomString& mediaFeature)
> {
> return mediaFeature == MediaFeatureNames::aspectRatio
> || mediaFeature == MediaFeatureNames::deviceAspectRatio
>@@ -142,7 +142,7 @@ static inline bool isAspectRatioFeature(const AtomicString& mediaFeature)
> || mediaFeature == MediaFeatureNames::maxDeviceAspectRatio;
> }
> 
>-static inline bool isFeatureValidWithoutValue(const AtomicString& mediaFeature, const MediaQueryParserContext& context)
>+static inline bool isFeatureValidWithoutValue(const AtomString& mediaFeature, const MediaQueryParserContext& context)
> {
> // Media features that are prefixed by min/max cannot be used without a value.
> return mediaFeature == MediaFeatureNames::anyHover
>diff --git a/Source/WebCore/css/MediaQueryExpression.h b/Source/WebCore/css/MediaQueryExpression.h
>index d4dac1d24d7732be1f1bdf330d8a8bb7eb7921ef..6c836559cc17545296f9c97002dd8145ead8af7c 100644
>--- a/Source/WebCore/css/MediaQueryExpression.h
>+++ b/Source/WebCore/css/MediaQueryExpression.h
>@@ -44,7 +44,7 @@ class MediaQueryExpression {
> public:
> explicit MediaQueryExpression(const String& mediaFeature, CSSParserTokenRange&, MediaQueryParserContext&);
> 
>- const AtomicString& mediaFeature() const;
>+ const AtomString& mediaFeature() const;
> CSSValue* value() const;
> 
> bool isValid() const;
>@@ -54,13 +54,13 @@ public:
> bool operator==(const MediaQueryExpression&) const;
> 
> private:
>- AtomicString m_mediaFeature;
>+ AtomString m_mediaFeature;
> RefPtr<CSSValue> m_value;
> bool m_isValid { false };
> mutable String m_serializationCache;
> };
> 
>-inline const AtomicString& MediaQueryExpression::mediaFeature() const
>+inline const AtomString& MediaQueryExpression::mediaFeature() const
> {
> return m_mediaFeature;
> }
>diff --git a/Source/WebCore/css/PageRuleCollector.cpp b/Source/WebCore/css/PageRuleCollector.cpp
>index d530334ccf81c50d6a1443476dc73a8fea5dc86d..a28450a8facbe809366f66dcfe20402e3139d13c 100644
>--- a/Source/WebCore/css/PageRuleCollector.cpp
>+++ b/Source/WebCore/css/PageRuleCollector.cpp
>@@ -94,7 +94,7 @@ static bool checkPageSelectorComponents(const CSSSelector* selector, bool isLeft
> {
> for (const CSSSelector* component = selector; component; component = component->tagHistory()) {
> if (component->match() == CSSSelector::Tag) {
>- const AtomicString& localName = component->tagQName().localName();
>+ const AtomString& localName = component->tagQName().localName();
> if (localName != starAtom() && localName != pageName)
> return false;
> } else if (component->match() == CSSSelector::PagePseudoClass) {
>diff --git a/Source/WebCore/css/PropertySetCSSStyleDeclaration.cpp b/Source/WebCore/css/PropertySetCSSStyleDeclaration.cpp
>index ed1ff23faa88f4815e1b5ed1b1ea60094668f1c2..3b20d413337533d6cb3c58cb3d104f0f04b5e619 100644
>--- a/Source/WebCore/css/PropertySetCSSStyleDeclaration.cpp
>+++ b/Source/WebCore/css/PropertySetCSSStyleDeclaration.cpp
>@@ -126,7 +126,7 @@ private:
> static bool s_shouldDeliver;
> 
> std::unique_ptr<MutationObserverInterestGroup> m_mutationRecipients;
>- AtomicString m_oldValue;
>+ AtomString m_oldValue;
> RefPtr<Element> m_customElement;
> };
> 
>diff --git a/Source/WebCore/css/RuleFeature.cpp b/Source/WebCore/css/RuleFeature.cpp
>index a488b85cd78e702a569a3039b6cd3df40804acb4..dffda6f51df954d206f03d0c73560dda392d1430 100644
>--- a/Source/WebCore/css/RuleFeature.cpp
>+++ b/Source/WebCore/css/RuleFeature.cpp
>@@ -217,7 +217,7 @@ void RuleFeatureSet::add(const RuleFeatureSet& other)
> usesFirstLetterRules = usesFirstLetterRules || other.usesFirstLetterRules;
> }
> 
>-void RuleFeatureSet::registerContentAttribute(const AtomicString& attributeName)
>+void RuleFeatureSet::registerContentAttribute(const AtomString& attributeName)
> {
> contentAttributeNamesInRules.add(attributeName.convertToASCIILowercase());
> attributeCanonicalLocalNamesInRules.add(attributeName);
>diff --git a/Source/WebCore/css/RuleFeature.h b/Source/WebCore/css/RuleFeature.h
>index f8c94035c315f48fcaaf3204afde39d8b525f48b..25ea4ecd8aadc9b53273e8a825a573f239710062 100644
>--- a/Source/WebCore/css/RuleFeature.h
>+++ b/Source/WebCore/css/RuleFeature.h
>@@ -25,8 +25,8 @@
> #include <wtf/Forward.h>
> #include <wtf/HashMap.h>
> #include <wtf/HashSet.h>
>-#include <wtf/text/AtomicString.h>
>-#include <wtf/text/AtomicStringHash.h>
>+#include <wtf/text/AtomString.h>
>+#include <wtf/text/AtomStringHash.h>
> 
> namespace WebCore {
> 
>@@ -57,20 +57,20 @@ struct RuleFeatureSet {
> void clear();
> void shrinkToFit();
> void collectFeatures(const RuleData&);
>- void registerContentAttribute(const AtomicString&);
>+ void registerContentAttribute(const AtomString&);
> 
>- HashSet<AtomicString> idsInRules;
>- HashSet<AtomicString> idsMatchingAncestorsInRules;
>- HashSet<AtomicString> attributeCanonicalLocalNamesInRules;
>- HashSet<AtomicString> attributeLocalNamesInRules;
>- HashSet<AtomicString> contentAttributeNamesInRules;
>+ HashSet<AtomString> idsInRules;
>+ HashSet<AtomString> idsMatchingAncestorsInRules;
>+ HashSet<AtomString> attributeCanonicalLocalNamesInRules;
>+ HashSet<AtomString> attributeLocalNamesInRules;
>+ HashSet<AtomString> contentAttributeNamesInRules;
> Vector<RuleFeature> siblingRules;
> Vector<RuleFeature> uncommonAttributeRules;
> 
>- HashMap<AtomicString, std::unique_ptr<Vector<RuleFeature>>> classRules;
>- HashMap<AtomicString, std::unique_ptr<Vector<RuleFeature>>> attributeRules;
>- HashSet<AtomicString> classesAffectingHost;
>- HashSet<AtomicString> attributesAffectingHost;
>+ HashMap<AtomString, std::unique_ptr<Vector<RuleFeature>>> classRules;
>+ HashMap<AtomString, std::unique_ptr<Vector<RuleFeature>>> attributeRules;
>+ HashSet<AtomString> classesAffectingHost;
>+ HashSet<AtomString> attributesAffectingHost;
> 
> bool usesFirstLineRules { false };
> bool usesFirstLetterRules { false };
>@@ -82,7 +82,7 @@ private:
> struct SelectorFeatures {
> bool hasSiblingSelector { false };
> 
>- Vector<std::pair<AtomicString, MatchElement>, 32> classes;
>+ Vector<std::pair<AtomString, MatchElement>, 32> classes;
> Vector<std::pair<const CSSSelector*, MatchElement>, 32> attributes;
> };
> void recursivelyCollectFeaturesFromSelector(SelectorFeatures&, const CSSSelector&, MatchElement = MatchElement::Subject);
>diff --git a/Source/WebCore/css/RuleSet.cpp b/Source/WebCore/css/RuleSet.cpp
>index 0eba42df452e8f2dec9a08d2ec8a4c0de688e232..fa6b9120213ec54bb65903cfae669bd466fbb027 100644
>--- a/Source/WebCore/css/RuleSet.cpp
>+++ b/Source/WebCore/css/RuleSet.cpp
>@@ -61,7 +61,7 @@ static inline MatchBasedOnRuleHash computeMatchBasedOnRuleHash(const CSSSelector
> 
> if (selector.match() == CSSSelector::Tag) {
> const QualifiedName& tagQualifiedName = selector.tagQName();
>- const AtomicString& selectorNamespace = tagQualifiedName.namespaceURI();
>+ const AtomString& selectorNamespace = tagQualifiedName.namespaceURI();
> if (selectorNamespace == starAtom() || selectorNamespace == xhtmlNamespaceURI) {
> if (tagQualifiedName == anyQName())
> return MatchBasedOnRuleHash::Universal;
>@@ -176,7 +176,7 @@ RuleSet::RuleSet() = default;
> 
> RuleSet::~RuleSet() = default;
> 
>-void RuleSet::addToRuleSet(const AtomicString& key, AtomRuleMap& map, const RuleData& ruleData)
>+void RuleSet::addToRuleSet(const AtomString& key, AtomRuleMap& map, const RuleData& ruleData)
> {
> if (key.isNull())
> return;
>@@ -186,7 +186,7 @@ void RuleSet::addToRuleSet(const AtomicString& key, AtomRuleMap& map, const Rule
> rules->append(ruleData);
> }
> 
>-static unsigned rulesCountForName(const RuleSet::AtomRuleMap& map, const AtomicString& name)
>+static unsigned rulesCountForName(const RuleSet::AtomRuleMap& map, const AtomString& name)
> {
> if (const auto* rules = map.get(name))
> return rules->size();
>diff --git a/Source/WebCore/css/RuleSet.h b/Source/WebCore/css/RuleSet.h
>index ba5dc60fe34c6b7678246734d322ac2f7a02f57f..2380fe70ca8bf6ec8aa05a3231d105dc3820385c 100644
>--- a/Source/WebCore/css/RuleSet.h
>+++ b/Source/WebCore/css/RuleSet.h
>@@ -27,8 +27,8 @@
> #include "StyleRule.h"
> #include <wtf/Forward.h>
> #include <wtf/HashMap.h>
>-#include <wtf/text/AtomicString.h>
>-#include <wtf/text/AtomicStringHash.h>
>+#include <wtf/text/AtomString.h>
>+#include <wtf/text/AtomStringHash.h>
> 
> namespace WebCore {
> 
>@@ -115,23 +115,23 @@ public:
> ~RuleSet();
> 
> typedef Vector<RuleData, 1> RuleDataVector;
>- typedef HashMap<AtomicString, std::unique_ptr<RuleDataVector>> AtomRuleMap;
>+ typedef HashMap<AtomString, std::unique_ptr<RuleDataVector>> AtomRuleMap;
> 
> void addRulesFromSheet(StyleSheetContents&, const MediaQueryEvaluator&, StyleResolver* = 0);
> 
> void addStyleRule(StyleRule*);
> void addRule(StyleRule*, unsigned selectorIndex, unsigned selectorListIndex);
> void addPageRule(StyleRulePage*);
>- void addToRuleSet(const AtomicString& key, AtomRuleMap&, const RuleData&);
>+ void addToRuleSet(const AtomString& key, AtomRuleMap&, const RuleData&);
> void shrinkToFit();
> void disableAutoShrinkToFit() { m_autoShrinkToFitEnabled = false; }
> 
> const RuleFeatureSet& features() const { return m_features; }
> 
>- const RuleDataVector* idRules(const AtomicString& key) const { return m_idRules.get(key); }
>- const RuleDataVector* classRules(const AtomicString& key) const { return m_classRules.get(key); }
>- const RuleDataVector* tagRules(const AtomicString& key, bool isHTMLName) const;
>- const RuleDataVector* shadowPseudoElementRules(const AtomicString& key) const { return m_shadowPseudoElementRules.get(key); }
>+ const RuleDataVector* idRules(const AtomString& key) const { return m_idRules.get(key); }
>+ const RuleDataVector* classRules(const AtomString& key) const { return m_classRules.get(key); }
>+ const RuleDataVector* tagRules(const AtomString& key, bool isHTMLName) const;
>+ const RuleDataVector* shadowPseudoElementRules(const AtomString& key) const { return m_shadowPseudoElementRules.get(key); }
> const RuleDataVector* linkPseudoClassRules() const { return &m_linkPseudoClassRules; }
> #if ENABLE(VIDEO_TRACK)
> const RuleDataVector* cuePseudoRules() const { return &m_cuePseudoRules; }
>@@ -171,7 +171,7 @@ private:
> RuleFeatureSet m_features;
> };
> 
>-inline const RuleSet::RuleDataVector* RuleSet::tagRules(const AtomicString& key, bool isHTMLName) const
>+inline const RuleSet::RuleDataVector* RuleSet::tagRules(const AtomString& key, bool isHTMLName) const
> {
> const AtomRuleMap* tagRules;
> if (isHTMLName)
>diff --git a/Source/WebCore/css/SelectorChecker.cpp b/Source/WebCore/css/SelectorChecker.cpp
>index 70c83b8ea32ae5ba5922dd2e9fd34c2eeecd7ddb..2db31dd5fe6912e60daebfe34a9b42ddb6056195 100644
>--- a/Source/WebCore/css/SelectorChecker.cpp
>+++ b/Source/WebCore/css/SelectorChecker.cpp
>@@ -451,9 +451,9 @@ SelectorChecker::MatchResult SelectorChecker::matchRecursively(CheckingContext&
> return MatchResult::fails(Match::SelectorFailsCompletely);
> }
> 
>-static bool attributeValueMatches(const Attribute& attribute, CSSSelector::Match match, const AtomicString& selectorValue, bool caseSensitive)
>+static bool attributeValueMatches(const Attribute& attribute, CSSSelector::Match match, const AtomString& selectorValue, bool caseSensitive)
> {
>- const AtomicString& value = attribute.value();
>+ const AtomString& value = attribute.value();
> ASSERT(!value.isNull());
> 
> switch (match) {
>@@ -559,7 +559,7 @@ static bool anyAttributeMatches(const Element& element, const CSSSelector& selec
> return false;
> }
> 
>-bool SelectorChecker::attributeSelectorMatches(const Element& element, const QualifiedName& attributeName, const AtomicString& attributeValue, const CSSSelector& selector)
>+bool SelectorChecker::attributeSelectorMatches(const Element& element, const QualifiedName& attributeName, const AtomString& attributeValue, const CSSSelector& selector)
> {
> ASSERT(selector.isAttributeSelector());
> auto& selectorAttribute = selector.attribute();
>@@ -636,11 +636,11 @@ static inline bool tagMatches(const Element& element, const CSSSelector& simpleS
> if (tagQName == anyQName())
> return true;
> 
>- const AtomicString& localName = (element.isHTMLElement() && element.document().isHTMLDocument()) ? simpleSelector.tagLowercaseLocalName() : tagQName.localName();
>+ const AtomString& localName = (element.isHTMLElement() && element.document().isHTMLDocument()) ? simpleSelector.tagLowercaseLocalName() : tagQName.localName();
> 
> if (localName != starAtom() && localName != element.localName())
> return false;
>- const AtomicString& namespaceURI = tagQName.namespaceURI();
>+ const AtomString& namespaceURI = tagQName.namespaceURI();
> return namespaceURI == starAtom() || namespaceURI == element.namespaceURI();
> }
> 
>diff --git a/Source/WebCore/css/SelectorChecker.h b/Source/WebCore/css/SelectorChecker.h
>index 3dbb113dbc0492a4feb104957e293579e9cf8ef1..60b7eea5170591a931a8f35dc613f04a8cd3e692 100644
>--- a/Source/WebCore/css/SelectorChecker.h
>+++ b/Source/WebCore/css/SelectorChecker.h
>@@ -96,7 +96,7 @@ public:
> 
> static bool isCommonPseudoClassSelector(const CSSSelector*);
> static bool matchesFocusPseudoClass(const Element&);
>- static bool attributeSelectorMatches(const Element&, const QualifiedName&, const AtomicString& attributeValue, const CSSSelector&);
>+ static bool attributeSelectorMatches(const Element&, const QualifiedName&, const AtomString& attributeValue, const CSSSelector&);
> 
> enum LinkMatchMask { MatchDefault = 0, MatchLink = 1, MatchVisited = 2, MatchAll = MatchLink | MatchVisited };
> static unsigned determineLinkMatchType(const CSSSelector*);
>diff --git a/Source/WebCore/css/SelectorCheckerTestFunctions.h b/Source/WebCore/css/SelectorCheckerTestFunctions.h
>index 5848fbe3523bf06237bc9b6699fad270561351c7..c3f784b57c9406db1d00cd8fb4adca6719b2606f 100644
>--- a/Source/WebCore/css/SelectorCheckerTestFunctions.h
>+++ b/Source/WebCore/css/SelectorCheckerTestFunctions.h
>@@ -172,9 +172,9 @@ ALWAYS_INLINE bool containslanguageSubtagMatchingRange(StringView language, Stri
> return false;
> }
> 
>-ALWAYS_INLINE bool matchesLangPseudoClass(const Element& element, const Vector<AtomicString>& argumentList)
>+ALWAYS_INLINE bool matchesLangPseudoClass(const Element& element, const Vector<AtomString>& argumentList)
> {
>- AtomicString language;
>+ AtomString language;
> #if ENABLE(VIDEO_TRACK)
> if (is<WebVTTElement>(element))
> language = downcast<WebVTTElement>(element).language();
>@@ -189,7 +189,7 @@ ALWAYS_INLINE bool matchesLangPseudoClass(const Element& element, const Vector<A
> // as specified in www.ietf.org/rfc/rfc4647.txt.
> StringView languageStringView = language.string();
> unsigned languageLength = language.length();
>- for (const AtomicString& range : argumentList) {
>+ for (const AtomString& range : argumentList) {
> if (range.isEmpty())
> continue;
> 
>diff --git a/Source/WebCore/css/SelectorFilter.cpp b/Source/WebCore/css/SelectorFilter.cpp
>index 8862c69042bbd1d1581ed5f75d2cc4b90bab8d30..0b65e680322f9e15d5a9abc0491bbc23d3d69336 100644
>--- a/Source/WebCore/css/SelectorFilter.cpp
>+++ b/Source/WebCore/css/SelectorFilter.cpp
>@@ -38,14 +38,14 @@ namespace WebCore {
> // Salt to separate otherwise identical string hashes so a class-selector like .article won't match <article> elements.
> enum { TagNameSalt = 13, IdSalt = 17, ClassSalt = 19, AttributeSalt = 23 };
> 
>-static bool isExcludedAttribute(const AtomicString& name)
>+static bool isExcludedAttribute(const AtomString& name)
> {
> return name == HTMLNames::classAttr->localName() || name == HTMLNames::idAttr->localName() || name == HTMLNames::styleAttr->localName();
> }
> 
> static inline void collectElementIdentifierHashes(const Element& element, Vector<unsigned, 4>& identifierHashes)
> {
>- AtomicString tagLowercaseLocalName = element.localName().convertToASCIILowercase();
>+ AtomString tagLowercaseLocalName = element.localName().convertToASCIILowercase();
> identifierHashes.append(tagLowercaseLocalName.impl()->existingHash() * TagNameSalt);
> 
> auto& id = element.idForStyleResolution();
>diff --git a/Source/WebCore/css/StyleBuilderCustom.h b/Source/WebCore/css/StyleBuilderCustom.h
>index ad5b02dbaa1aaddee837376dc080ea5a5a7caa3a..9a191d17dd8e3edcc1c130c26590e0ca6f4e36a3 100644
>--- a/Source/WebCore/css/StyleBuilderCustom.h
>+++ b/Source/WebCore/css/StyleBuilderCustom.h
>@@ -145,8 +145,8 @@ public:
> static void applyValueStrokeWidth(StyleResolver&, CSSValue&);
> static void applyValueStrokeColor(StyleResolver&, CSSValue&);
> 
>- static void applyInitialCustomProperty(StyleResolver&, const CSSRegisteredCustomProperty*, const AtomicString& name);
>- static void applyInheritCustomProperty(StyleResolver&, const CSSRegisteredCustomProperty*, const AtomicString& name);
>+ static void applyInitialCustomProperty(StyleResolver&, const CSSRegisteredCustomProperty*, const AtomString& name);
>+ static void applyInheritCustomProperty(StyleResolver&, const CSSRegisteredCustomProperty*, const AtomString& name);
> static void applyValueCustomProperty(StyleResolver&, const CSSRegisteredCustomProperty*, CSSCustomPropertyValue&);
> 
> private:
>@@ -901,12 +901,12 @@ inline void StyleBuilderCustom::applyValueFontFamily(StyleResolver& styleResolve
> // Before mapping in a new font-family property, we should reset the generic family.
> bool oldFamilyUsedFixedDefaultSize = fontDescription.useFixedDefaultSize();
> 
>- Vector<AtomicString> families;
>+ Vector<AtomString> families;
> families.reserveInitialCapacity(valueList.length());
> 
> for (auto& item : valueList) {
> auto& contentValue = downcast<CSSPrimitiveValue>(item.get());
>- AtomicString family;
>+ AtomString family;
> bool isGenericFamily = false;
> if (contentValue.isFontFamily()) {
> const CSSFontFamily& fontFamily = contentValue.fontFamily();
>@@ -1135,7 +1135,7 @@ inline void StyleBuilderCustom::applyValueCounter(StyleResolver& styleResolver,
> 
> for (auto& item : downcast<CSSValueList>(value)) {
> Pair* pair = downcast<CSSPrimitiveValue>(item.get()).pairValue();
>- AtomicString identifier = pair->first()->stringValue();
>+ AtomString identifier = pair->first()->stringValue();
> int value = pair->second()->intValue();
> auto& directives = map.add(identifier, CounterDirectives { }).iterator->value;
> if (counterBehavior == Reset)
>@@ -1348,7 +1348,7 @@ inline void StyleBuilderCustom::applyValueContent(StyleResolver& styleResolver,
> else
> const_cast<RenderStyle*>(styleResolver.parentStyle())->setHasAttrContent();
> QualifiedName attr(nullAtom(), contentValue.stringValue().impl(), nullAtom());
>- const AtomicString& value = styleResolver.element()->getAttribute(attr);
>+ const AtomString& value = styleResolver.element()->getAttribute(attr);
> styleResolver.style()->setContent(value.isNull() ? emptyAtom() : value.impl(), didSet);
> didSet = true;
> // Register the fact that the attribute value affects the style.
>@@ -1745,7 +1745,7 @@ void StyleBuilderCustom::applyValueAlt(StyleResolver& styleResolver, CSSValue& v
> const_cast<RenderStyle*>(styleResolver.parentStyle())->setUnique();
> 
> QualifiedName attr(nullAtom(), primitiveValue.stringValue(), nullAtom());
>- const AtomicString& value = styleResolver.element()->getAttribute(attr);
>+ const AtomString& value = styleResolver.element()->getAttribute(attr);
> styleResolver.style()->setContentAltText(value.isNull() ? emptyAtom() : value);
> 
> // Register the fact that the attribute value affects the style.
>@@ -1799,7 +1799,7 @@ inline void StyleBuilderCustom::applyValueStrokeColor(StyleResolver& styleResolv
> styleResolver.style()->setHasExplicitlySetStrokeColor(true);
> }
> 
>-inline void StyleBuilderCustom::applyInitialCustomProperty(StyleResolver& styleResolver, const CSSRegisteredCustomProperty* registered, const AtomicString& name)
>+inline void StyleBuilderCustom::applyInitialCustomProperty(StyleResolver& styleResolver, const CSSRegisteredCustomProperty* registered, const AtomString& name)
> {
> if (registered && registered->initialValue()) {
> auto initialValue = registered->initialValueCopy();
>@@ -1811,7 +1811,7 @@ inline void StyleBuilderCustom::applyInitialCustomProperty(StyleResolver& styleR
> applyValueCustomProperty(styleResolver, registered, invalid.get());
> }
> 
>-inline void StyleBuilderCustom::applyInheritCustomProperty(StyleResolver& styleResolver, const CSSRegisteredCustomProperty* registered, const AtomicString& name)
>+inline void StyleBuilderCustom::applyInheritCustomProperty(StyleResolver& styleResolver, const CSSRegisteredCustomProperty* registered, const AtomString& name)
> {
> auto* parentValue = styleResolver.parentStyle() ? styleResolver.parentStyle()->inheritedCustomProperties().get(name) : nullptr;
> if (parentValue && !(registered && !registered->inherits))
>diff --git a/Source/WebCore/css/StyleResolver.cpp b/Source/WebCore/css/StyleResolver.cpp
>index ddd9414e524cd09700d0d812ae46aea72af67984..6441004698be35cfc8d7ea61c1407a8b00f790c6 100644
>--- a/Source/WebCore/css/StyleResolver.cpp
>+++ b/Source/WebCore/css/StyleResolver.cpp
>@@ -111,7 +111,7 @@
> #include <wtf/Seconds.h>
> #include <wtf/StdLibExtras.h>
> #include <wtf/Vector.h>
>-#include <wtf/text/AtomicStringHash.h>
>+#include <wtf/text/AtomStringHash.h>
> 
> namespace WebCore {
> 
>@@ -255,7 +255,7 @@ void StyleResolver::appendAuthorStyleSheets(const Vector<RefPtr<CSSStyleSheet>>&
> // This is a simplified style setting function for keyframe styles
> void StyleResolver::addKeyframeStyle(Ref<StyleRuleKeyframes>&& rule)
> {
>- AtomicString s(rule->name());
>+ AtomString s(rule->name());
> m_keyframesRuleMap.set(s.impl(), WTFMove(rule));
> }
> 
>@@ -459,7 +459,7 @@ std::unique_ptr<RenderStyle> StyleResolver::styleForKeyframe(const RenderStyle*
> 
> bool StyleResolver::isAnimationNameValid(const String& name)
> {
>- return m_keyframesRuleMap.find(AtomicString(name).impl()) != m_keyframesRuleMap.end();
>+ return m_keyframesRuleMap.find(AtomString(name).impl()) != m_keyframesRuleMap.end();
> }
> 
> void StyleResolver::keyframeStylesForAnimation(const Element& element, const RenderStyle* elementStyle, KeyframeList& list)
>@@ -760,7 +760,7 @@ void StyleResolver::adjustStyleForInterCharacterRuby()
> static bool hasEffectiveDisplayNoneForDisplayContents(const Element& element)
> {
> // https://drafts.csswg.org/css-display-3/#unbox-html
>- static NeverDestroyed<HashSet<AtomicString>> tagNames = [] {
>+ static NeverDestroyed<HashSet<AtomString>> tagNames = [] {
> static const HTMLQualifiedName* const tagList[] = {
> &brTag.get(),
> &wbrTag.get(),
>@@ -780,7 +780,7 @@ static bool hasEffectiveDisplayNoneForDisplayContents(const Element& element)
> &textareaTag.get(),
> &selectTag.get(),
> };
>- HashSet<AtomicString> set;
>+ HashSet<AtomString> set;
> for (auto& name : tagList)
> set.add(name->localName());
> return set;
>@@ -1162,13 +1162,13 @@ void StyleResolver::adjustRenderStyleForSiteSpecificQuirks(RenderStyle& style, c
> {
> if (document().quirks().needsGMailOverflowScrollQuirk()) {
> // This turns sidebar scrollable without mouse move event.
>- static NeverDestroyed<AtomicString> roleValue("navigation", AtomicString::ConstructFromLiteral);
>+ static NeverDestroyed<AtomString> roleValue("navigation", AtomString::ConstructFromLiteral);
> if (style.overflowY() == Overflow::Hidden && element.attributeWithoutSynchronization(roleAttr) == roleValue)
> style.setOverflowY(Overflow::Auto);
> }
> if (document().quirks().needsYouTubeOverflowScrollQuirk()) {
> // This turns sidebar scrollable without hover.
>- static NeverDestroyed<AtomicString> idValue("guide-inner-content", AtomicString::ConstructFromLiteral);
>+ static NeverDestroyed<AtomString> idValue("guide-inner-content", AtomString::ConstructFromLiteral);
> if (style.overflowY() == Overflow::Hidden && element.idForStyleResolution() == idValue)
> style.setOverflowY(Overflow::Auto);
> }
>diff --git a/Source/WebCore/css/StyleResolver.h b/Source/WebCore/css/StyleResolver.h
>index 2a34b26d71b245f613b261f351f2740cc584945e..01bb8fbb3dc1230c0f39184e19a1fea64410a295 100644
>--- a/Source/WebCore/css/StyleResolver.h
>+++ b/Source/WebCore/css/StyleResolver.h
>@@ -36,7 +36,7 @@
> #include <wtf/HashMap.h>
> #include <wtf/RefPtr.h>
> #include <wtf/Vector.h>
>-#include <wtf/text/AtomicStringHash.h>
>+#include <wtf/text/AtomStringHash.h>
> #include <wtf/text/StringHash.h>
> 
> namespace WebCore {
>@@ -193,8 +193,8 @@ public:
> static bool colorFromPrimitiveValueIsDerivedFromElement(const CSSPrimitiveValue&);
> Color colorFromPrimitiveValue(const CSSPrimitiveValue&, bool forVisitedLink = false) const;
> 
>- bool hasSelectorForId(const AtomicString&) const;
>- bool hasSelectorForAttribute(const Element&, const AtomicString&) const;
>+ bool hasSelectorForId(const AtomString&) const;
>+ bool hasSelectorForAttribute(const Element&, const AtomString&) const;
> 
> #if ENABLE(CSS_DEVICE_ADAPTATION)
> ViewportStyleResolver* viewportStyleResolver() { return m_viewportStyleResolver.get(); }
>@@ -287,7 +287,7 @@ public:
> 
> void applyDeferredProperties(StyleResolver&, ApplyCascadedPropertyState&);
> 
>- HashMap<AtomicString, Property>& customProperties() { return m_customProperties; }
>+ HashMap<AtomString, Property>& customProperties() { return m_customProperties; }
> bool hasCustomProperty(const String&) const;
> Property customProperty(const String&) const;
> 
>@@ -301,7 +301,7 @@ public:
> std::bitset<numCSSProperties + 2> m_propertyIsPresent;
> 
> Vector<Property, 8> m_deferredProperties;
>- HashMap<AtomicString, Property> m_customProperties;
>+ HashMap<AtomString, Property> m_customProperties;
> 
> TextDirection m_direction;
> WritingMode m_writingMode;
>@@ -346,7 +346,7 @@ private:
> 
> DocumentRuleSets m_ruleSets;
> 
>- typedef HashMap<AtomicStringImpl*, RefPtr<StyleRuleKeyframes>> KeyframesRuleMap;
>+ typedef HashMap<AtomStringImpl*, RefPtr<StyleRuleKeyframes>> KeyframesRuleMap;
> KeyframesRuleMap m_keyframesRuleMap;
> 
> public:
>@@ -552,7 +552,7 @@ struct ApplyCascadedPropertyState {
> };
> 
> 
>-inline bool StyleResolver::hasSelectorForAttribute(const Element& element, const AtomicString &attributeName) const
>+inline bool StyleResolver::hasSelectorForAttribute(const Element& element, const AtomString &attributeName) const
> {
> ASSERT(!attributeName.isEmpty());
> if (element.isHTMLElement())
>@@ -560,7 +560,7 @@ inline bool StyleResolver::hasSelectorForAttribute(const Element& element, const
> return m_ruleSets.features().attributeLocalNamesInRules.contains(attributeName);
> }
> 
>-inline bool StyleResolver::hasSelectorForId(const AtomicString& idValue) const
>+inline bool StyleResolver::hasSelectorForId(const AtomString& idValue) const
> {
> ASSERT(!idValue.isEmpty());
> return m_ruleSets.features().idsInRules.contains(idValue);
>diff --git a/Source/WebCore/css/StyleRule.cpp b/Source/WebCore/css/StyleRule.cpp
>index 1eefeb8bd10c254b824bc06cd5b8aef06602184f..1df0a2a42573a86af8dde38a1caa39dd469cc72c 100644
>--- a/Source/WebCore/css/StyleRule.cpp
>+++ b/Source/WebCore/css/StyleRule.cpp
>@@ -434,7 +434,7 @@ StyleRuleCharset::StyleRuleCharset(const StyleRuleCharset& o)
> 
> StyleRuleCharset::~StyleRuleCharset() = default;
> 
>-StyleRuleNamespace::StyleRuleNamespace(AtomicString prefix, AtomicString uri)
>+StyleRuleNamespace::StyleRuleNamespace(AtomString prefix, AtomString uri)
> : StyleRuleBase(Namespace)
> , m_prefix(prefix)
> , m_uri(uri)
>diff --git a/Source/WebCore/css/StyleRule.h b/Source/WebCore/css/StyleRule.h
>index 401d04942c31e13108b0bde8544541cca8feec08..9e6a96d23f8c8e1cbf7239d2ddc0df9a586c4994 100644
>--- a/Source/WebCore/css/StyleRule.h
>+++ b/Source/WebCore/css/StyleRule.h
>@@ -343,7 +343,7 @@ private:
> 
> class StyleRuleNamespace final : public StyleRuleBase {
> public:
>- static Ref<StyleRuleNamespace> create(AtomicString prefix, AtomicString uri)
>+ static Ref<StyleRuleNamespace> create(AtomString prefix, AtomString uri)
> {
> return adoptRef(*new StyleRuleNamespace(prefix, uri));
> }
>@@ -352,15 +352,15 @@ public:
> 
> Ref<StyleRuleNamespace> copy() const { return adoptRef(*new StyleRuleNamespace(*this)); }
> 
>- AtomicString prefix() const { return m_prefix; }
>- AtomicString uri() const { return m_uri; }
>+ AtomString prefix() const { return m_prefix; }
>+ AtomString uri() const { return m_uri; }
> 
> private:
>- StyleRuleNamespace(AtomicString prefix, AtomicString uri);
>+ StyleRuleNamespace(AtomString prefix, AtomString uri);
> StyleRuleNamespace(const StyleRuleNamespace&);
> 
>- AtomicString m_prefix;
>- AtomicString m_uri;
>+ AtomString m_prefix;
>+ AtomString m_uri;
> };
> 
> } // namespace WebCore
>diff --git a/Source/WebCore/css/StyleSheetContents.cpp b/Source/WebCore/css/StyleSheetContents.cpp
>index aecbb20f39e93f4f7b8ca2dca1cef9cb7ee970d9..8e8818cc63cbe0ad322d5fd4077a600416ae63ce 100644
>--- a/Source/WebCore/css/StyleSheetContents.cpp
>+++ b/Source/WebCore/css/StyleSheetContents.cpp
>@@ -295,7 +295,7 @@ void StyleSheetContents::wrapperDeleteRule(unsigned index)
> m_childRules.remove(childVectorIndex);
> }
> 
>-void StyleSheetContents::parserAddNamespace(const AtomicString& prefix, const AtomicString& uri)
>+void StyleSheetContents::parserAddNamespace(const AtomString& prefix, const AtomString& uri)
> {
> ASSERT(!uri.isNull());
> if (prefix.isNull()) {
>@@ -308,7 +308,7 @@ void StyleSheetContents::parserAddNamespace(const AtomicString& prefix, const At
> result.iterator->value = uri;
> }
> 
>-const AtomicString& StyleSheetContents::namespaceURIFromPrefix(const AtomicString& prefix)
>+const AtomString& StyleSheetContents::namespaceURIFromPrefix(const AtomString& prefix)
> {
> PrefixNamespaceURIMap::const_iterator it = m_namespaces.find(prefix);
> if (it == m_namespaces.end())
>diff --git a/Source/WebCore/css/StyleSheetContents.h b/Source/WebCore/css/StyleSheetContents.h
>index 553716203ea8a5f3f50d2e1cbb2a4c72c868da2b..cedc0ed3d85079d1446b398a6f6b84e45455b27e 100644
>--- a/Source/WebCore/css/StyleSheetContents.h
>+++ b/Source/WebCore/css/StyleSheetContents.h
>@@ -28,7 +28,7 @@
> #include <wtf/URL.h>
> #include <wtf/Vector.h>
> #include <wtf/WeakPtr.h>
>-#include <wtf/text/AtomicStringHash.h>
>+#include <wtf/text/AtomStringHash.h>
> 
> namespace WebCore {
> 
>@@ -62,8 +62,8 @@ public:
> 
> const CSSParserContext& parserContext() const { return m_parserContext; }
> 
>- const AtomicString& defaultNamespace() { return m_defaultNamespace; }
>- const AtomicString& namespaceURIFromPrefix(const AtomicString& prefix);
>+ const AtomString& defaultNamespace() { return m_defaultNamespace; }
>+ const AtomString& namespaceURIFromPrefix(const AtomString& prefix);
> 
> void parseAuthorStyleSheet(const CachedCSSStyleSheet*, const SecurityOrigin*);
> WEBCORE_EXPORT bool parseString(const String&);
>@@ -94,7 +94,7 @@ public:
> void setHasSyntacticallyValidCSSHeader(bool b) { m_hasSyntacticallyValidCSSHeader = b; }
> bool hasSyntacticallyValidCSSHeader() const { return m_hasSyntacticallyValidCSSHeader; }
> 
>- void parserAddNamespace(const AtomicString& prefix, const AtomicString& uri);
>+ void parserAddNamespace(const AtomString& prefix, const AtomString& uri);
> void parserAppendRule(Ref<StyleRuleBase>&&);
> void parserSetEncodingFromCharsetRule(const String& encoding); 
> void parserSetUsesStyleBasedEditability() { m_usesStyleBasedEditability = true; }
>@@ -161,9 +161,9 @@ private:
> Vector<RefPtr<StyleRuleImport>> m_importRules;
> Vector<RefPtr<StyleRuleNamespace>> m_namespaceRules;
> Vector<RefPtr<StyleRuleBase>> m_childRules;
>- typedef HashMap<AtomicString, AtomicString> PrefixNamespaceURIMap;
>+ typedef HashMap<AtomString, AtomString> PrefixNamespaceURIMap;
> PrefixNamespaceURIMap m_namespaces;
>- AtomicString m_defaultNamespace;
>+ AtomString m_defaultNamespace;
> 
> bool m_isUserStyleSheet;
> bool m_loadCompleted { false };
>diff --git a/Source/WebCore/css/StyleSheetList.cpp b/Source/WebCore/css/StyleSheetList.cpp
>index 86932d203d8a25e5ad3069221fe0ea75482c7a17..b53947d18ce13c61d66410dd88dda0e3cb38ffe7 100644
>--- a/Source/WebCore/css/StyleSheetList.cpp
>+++ b/Source/WebCore/css/StyleSheetList.cpp
>@@ -86,7 +86,7 @@ StyleSheet* StyleSheetList::item(unsigned index)
> return index < sheets.size() ? sheets[index].get() : 0;
> }
> 
>-CSSStyleSheet* StyleSheetList::namedItem(const AtomicString& name) const
>+CSSStyleSheet* StyleSheetList::namedItem(const AtomString& name) const
> {
> // Support the named getter on document for backwards compatibility.
> if (!m_document)
>@@ -103,10 +103,10 @@ CSSStyleSheet* StyleSheetList::namedItem(const AtomicString& name) const
> return nullptr;
> }
> 
>-Vector<AtomicString> StyleSheetList::supportedPropertyNames()
>+Vector<AtomString> StyleSheetList::supportedPropertyNames()
> {
> // FIXME: Should be implemented.
>- return Vector<AtomicString>();
>+ return Vector<AtomString>();
> }
> 
> } // namespace WebCore
>diff --git a/Source/WebCore/css/StyleSheetList.h b/Source/WebCore/css/StyleSheetList.h
>index 48025719105ae2933ee087d41352161b9c301670..c1c4840fb71786e9ce3c8001c46ad25e7a2a0eed 100644
>--- a/Source/WebCore/css/StyleSheetList.h
>+++ b/Source/WebCore/css/StyleSheetList.h
>@@ -43,8 +43,8 @@ public:
> WEBCORE_EXPORT unsigned length() const;
> WEBCORE_EXPORT StyleSheet* item(unsigned index);
> 
>- CSSStyleSheet* namedItem(const AtomicString&) const;
>- Vector<AtomicString> supportedPropertyNames();
>+ CSSStyleSheet* namedItem(const AtomString&) const;
>+ Vector<AtomString> supportedPropertyNames();
> 
> Node* ownerNode() const;
> 
>diff --git a/Source/WebCore/css/makeprop.pl b/Source/WebCore/css/makeprop.pl
>index 869735f10a89c452f6154984f9db61f1b980d506..7acc58cbf12e4aaf574ad382e55a46458cbec9f6 100755
>--- a/Source/WebCore/css/makeprop.pl
>+++ b/Source/WebCore/css/makeprop.pl
>@@ -248,7 +248,7 @@ print GPERF << "EOF";
> #include \"HashTools.h\"
> #include "RuntimeEnabledFeatures.h"
> #include <wtf/ASCIICType.h>
>-#include <wtf/text/AtomicString.h>
>+#include <wtf/text/AtomString.h>
> #include <wtf/text/WTFString.h>
> #include <string.h>
> 
>@@ -350,7 +350,7 @@ const char* getPropertyName(CSSPropertyID id)
> return propertyNameStrings[index];
> }
> 
>-const AtomicString& getPropertyNameAtomicString(CSSPropertyID id)
>+const AtomString& getPropertyNameAtomString(CSSPropertyID id)
> {
> if (id < firstCSSProperty)
> return nullAtom();
>@@ -358,11 +358,11 @@ const AtomicString& getPropertyNameAtomicString(CSSPropertyID id)
> if (index >= numCSSProperties)
> return nullAtom();
> 
>- static AtomicString* propertyStrings = new AtomicString[numCSSProperties]; // Intentionally never destroyed.
>- AtomicString& propertyString = propertyStrings[index];
>+ static AtomString* propertyStrings = new AtomString[numCSSProperties]; // Intentionally never destroyed.
>+ AtomString& propertyString = propertyStrings[index];
> if (propertyString.isNull()) {
> const char* propertyName = propertyNameStrings[index];
>- propertyString = AtomicString(propertyName, strlen(propertyName), AtomicString::ConstructFromLiteral);
>+ propertyString = AtomString(propertyName, strlen(propertyName), AtomString::ConstructFromLiteral);
> }
> return propertyString;
> }
>@@ -370,7 +370,7 @@ const AtomicString& getPropertyNameAtomicString(CSSPropertyID id)
> String getPropertyNameString(CSSPropertyID id)
> {
> // We share the StringImpl with the AtomicStrings.
>- return getPropertyNameAtomicString(id).string();
>+ return getPropertyNameAtomString(id).string();
> }
> 
> String getJSPropertyName(CSSPropertyID id)
>@@ -487,7 +487,7 @@ print HEADER << "EOF";
> bool isInternalCSSProperty(const CSSPropertyID);
> bool isEnabledCSSProperty(const CSSPropertyID);
> const char* getPropertyName(CSSPropertyID);
>-const WTF::AtomicString& getPropertyNameAtomicString(CSSPropertyID id);
>+const WTF::AtomString& getPropertyNameAtomString(CSSPropertyID id);
> WTF::String getPropertyNameString(CSSPropertyID id);
> WTF::String getJSPropertyName(CSSPropertyID);
> 
>diff --git a/Source/WebCore/css/makevalues.pl b/Source/WebCore/css/makevalues.pl
>index d1e8090d81d6e8c1c6fd8872f0d16b278e6c2217..7224df5114246795fde5b64991b2c5c269c74125 100755
>--- a/Source/WebCore/css/makevalues.pl
>+++ b/Source/WebCore/css/makevalues.pl
>@@ -74,7 +74,7 @@ print GPERF << "EOF";
> #include \"CSSValueKeywords.h\"
> #include \"HashTools.h\"
> #include <wtf/ASCIICType.h>
>-#include <wtf/text/AtomicString.h>
>+#include <wtf/text/AtomString.h>
> #include <wtf/text/WTFString.h>
> #include <string.h>
> 
>@@ -131,13 +131,13 @@ const char* getValueName(unsigned short id)
> return valueList[id];
> }
> 
>-const AtomicString& getValueNameAtomicString(CSSValueID id)
>+const AtomString& getValueNameAtomString(CSSValueID id)
> {
> if (id < firstCSSValueKeyword || id > lastCSSValueKeyword)
> return nullAtom();
> 
>- static AtomicString* valueKeywordStrings = new AtomicString[numCSSValueKeywords]; // Leaked intentionally.
>- AtomicString& valueKeywordString = valueKeywordStrings[id];
>+ static AtomString* valueKeywordStrings = new AtomString[numCSSValueKeywords]; // Leaked intentionally.
>+ AtomString& valueKeywordString = valueKeywordStrings[id];
> if (valueKeywordString.isNull())
> valueKeywordString = getValueName(id);
> return valueKeywordString;
>@@ -146,7 +146,7 @@ const AtomicString& getValueNameAtomicString(CSSValueID id)
> String getValueNameString(CSSValueID id)
> {
> // We share the StringImpl with the AtomicStrings.
>- return getValueNameAtomicString(id).string();
>+ return getValueNameAtomString(id).string();
> }
> 
> } // namespace WebCore
>@@ -194,7 +194,7 @@ print HEADER "const size_t maxCSSValueKeywordLength = " . $maxLen . ";\n";
> print HEADER << "EOF";
> 
> const char* getValueName(unsigned short id);
>-const WTF::AtomicString& getValueNameAtomicString(CSSValueID id);
>+const WTF::AtomString& getValueNameAtomString(CSSValueID id);
> WTF::String getValueNameString(CSSValueID id);
> 
> inline CSSValueID convertToCSSValueID(int value)
>diff --git a/Source/WebCore/css/parser/CSSParser.cpp b/Source/WebCore/css/parser/CSSParser.cpp
>index b4fa697c967a19145c3de332e357c6232d4a9ab2..05e100b9e697eaf93572492b572d1bef6b0f3b1b 100644
>--- a/Source/WebCore/css/parser/CSSParser.cpp
>+++ b/Source/WebCore/css/parser/CSSParser.cpp
>@@ -146,7 +146,7 @@ CSSParser::ParseResult CSSParser::parseValue(MutableStyleProperties& declaration
> return parser.parseValue(declaration, propertyID, string, important);
> }
> 
>-CSSParser::ParseResult CSSParser::parseCustomPropertyValue(MutableStyleProperties& declaration, const AtomicString& propertyName, const String& string, bool important, const CSSParserContext& context)
>+CSSParser::ParseResult CSSParser::parseCustomPropertyValue(MutableStyleProperties& declaration, const AtomString& propertyName, const String& string, bool important, const CSSParserContext& context)
> {
> return CSSParserImpl::parseCustomPropertyValue(&declaration, propertyName, string, important, context);
> }
>diff --git a/Source/WebCore/css/parser/CSSParser.h b/Source/WebCore/css/parser/CSSParser.h
>index 47063cdfb9a255c56bfdc45f6ce4b036441100fa..e3307898faaff2cf72f581a0c28c8e5722653c37 100644
>--- a/Source/WebCore/css/parser/CSSParser.h
>+++ b/Source/WebCore/css/parser/CSSParser.h
>@@ -67,7 +67,7 @@ public:
> static void parseDeclarationForInspector(const CSSParserContext&, const String&, CSSParserObserver&);
> 
> static ParseResult parseValue(MutableStyleProperties&, CSSPropertyID, const String&, bool important, const CSSParserContext&);
>- static ParseResult parseCustomPropertyValue(MutableStyleProperties&, const AtomicString& propertyName, const String&, bool important, const CSSParserContext&);
>+ static ParseResult parseCustomPropertyValue(MutableStyleProperties&, const AtomString& propertyName, const String&, bool important, const CSSParserContext&);
> 
> static RefPtr<CSSValue> parseFontFaceDescriptor(CSSPropertyID, const String&, const CSSParserContext&);
> 
>diff --git a/Source/WebCore/css/parser/CSSParserImpl.cpp b/Source/WebCore/css/parser/CSSParserImpl.cpp
>index 4110cd4f554e26767eee69aee48fec38d8d8a61a..fefb77d5b4e526e5916ece593658cac18c2eb7b9 100644
>--- a/Source/WebCore/css/parser/CSSParserImpl.cpp
>+++ b/Source/WebCore/css/parser/CSSParserImpl.cpp
>@@ -96,7 +96,7 @@ CSSParser::ParseResult CSSParserImpl::parseValue(MutableStyleProperties* declara
> return declaration->addParsedProperties(parser.m_parsedProperties) ? CSSParser::ParseResult::Changed : CSSParser::ParseResult::Unchanged;
> }
> 
>-CSSParser::ParseResult CSSParserImpl::parseCustomPropertyValue(MutableStyleProperties* declaration, const AtomicString& propertyName, const String& string, bool important, const CSSParserContext& context)
>+CSSParser::ParseResult CSSParserImpl::parseCustomPropertyValue(MutableStyleProperties* declaration, const AtomString& propertyName, const String& string, bool important, const CSSParserContext& context)
> {
> CSSParserImpl parser(context, string);
> parser.consumeCustomPropertyValue(parser.tokenizer()->tokenRange(), propertyName, important);
>@@ -105,7 +105,7 @@ CSSParser::ParseResult CSSParserImpl::parseCustomPropertyValue(MutableStylePrope
> return declaration->addParsedProperties(parser.m_parsedProperties) ? CSSParser::ParseResult::Changed : CSSParser::ParseResult::Unchanged;
> }
> 
>-static inline void filterProperties(bool important, const ParsedPropertyVector& input, ParsedPropertyVector& output, size_t& unusedEntries, std::bitset<numCSSProperties>& seenProperties, HashSet<AtomicString>& seenCustomProperties)
>+static inline void filterProperties(bool important, const ParsedPropertyVector& input, ParsedPropertyVector& output, size_t& unusedEntries, std::bitset<numCSSProperties>& seenProperties, HashSet<AtomString>& seenCustomProperties)
> {
> // Add properties in reverse order so that highest priority definitions are reached first. Duplicate definitions can then be ignored when found.
> for (size_t i = input.size(); i--; ) {
>@@ -146,7 +146,7 @@ static Ref<ImmutableStyleProperties> createStyleProperties(ParsedPropertyVector&
> std::bitset<numCSSProperties> seenProperties;
> size_t unusedEntries = parsedProperties.size();
> ParsedPropertyVector results(unusedEntries);
>- HashSet<AtomicString> seenCustomProperties;
>+ HashSet<AtomString> seenCustomProperties;
> 
> filterProperties(true, parsedProperties, results, unusedEntries, seenProperties, seenCustomProperties);
> filterProperties(false, parsedProperties, results, unusedEntries, seenProperties, seenCustomProperties);
>@@ -213,7 +213,7 @@ bool CSSParserImpl::parseDeclarationList(MutableStyleProperties* declaration, co
> std::bitset<numCSSProperties> seenProperties;
> size_t unusedEntries = parser.m_parsedProperties.size();
> ParsedPropertyVector results(unusedEntries);
>- HashSet<AtomicString> seenCustomProperties;
>+ HashSet<AtomString> seenCustomProperties;
> filterProperties(true, parser.m_parsedProperties, results, unusedEntries, seenProperties, seenCustomProperties);
> filterProperties(false, parser.m_parsedProperties, results, unusedEntries, seenProperties, seenCustomProperties);
> if (unusedEntries)
>@@ -264,16 +264,16 @@ CSSSelectorList CSSParserImpl::parsePageSelector(CSSParserTokenRange range, Styl
> {
> // We only support a small subset of the css-page spec.
> range.consumeWhitespace();
>- AtomicString typeSelector;
>+ AtomString typeSelector;
> if (range.peek().type() == IdentToken)
>- typeSelector = range.consume().value().toAtomicString();
>+ typeSelector = range.consume().value().toAtomString();
> 
>- AtomicString pseudo;
>+ AtomString pseudo;
> if (range.peek().type() == ColonToken) {
> range.consume();
> if (range.peek().type() != IdentToken)
> return CSSSelectorList();
>- pseudo = range.consume().value().toAtomicString();
>+ pseudo = range.consume().value().toAtomString();
> }
> 
> range.consumeWhitespace();
>@@ -477,21 +477,21 @@ RefPtr<StyleRuleBase> CSSParserImpl::consumeQualifiedRule(CSSParserTokenRange& r
> }
> 
> // This may still consume tokens if it fails
>-static AtomicString consumeStringOrURI(CSSParserTokenRange& range)
>+static AtomString consumeStringOrURI(CSSParserTokenRange& range)
> {
> const CSSParserToken& token = range.peek();
> 
> if (token.type() == StringToken || token.type() == UrlToken)
>- return range.consumeIncludingWhitespace().value().toAtomicString();
>+ return range.consumeIncludingWhitespace().value().toAtomString();
> 
> if (token.type() != FunctionToken || !equalIgnoringASCIICase(token.value(), "url"))
>- return AtomicString();
>+ return AtomString();
> 
> CSSParserTokenRange contents = range.consumeBlock();
> const CSSParserToken& uri = contents.consumeIncludingWhitespace();
> if (uri.type() == BadStringToken || !contents.atEnd())
>- return AtomicString();
>- return uri.value().toAtomicString();
>+ return AtomString();
>+ return uri.value().toAtomString();
> }
> 
> RefPtr<StyleRuleCharset> CSSParserImpl::consumeCharsetRule(CSSParserTokenRange prelude)
>@@ -504,7 +504,7 @@ RefPtr<StyleRuleCharset> CSSParserImpl::consumeCharsetRule(CSSParserTokenRange p
> 
> RefPtr<StyleRuleImport> CSSParserImpl::consumeImportRule(CSSParserTokenRange prelude)
> {
>- AtomicString uri(consumeStringOrURI(prelude));
>+ AtomString uri(consumeStringOrURI(prelude));
> if (uri.isNull())
> return nullptr; // Parse error, expected string or URI
> 
>@@ -521,11 +521,11 @@ RefPtr<StyleRuleImport> CSSParserImpl::consumeImportRule(CSSParserTokenRange pre
> 
> RefPtr<StyleRuleNamespace> CSSParserImpl::consumeNamespaceRule(CSSParserTokenRange prelude)
> {
>- AtomicString namespacePrefix;
>+ AtomString namespacePrefix;
> if (prelude.peek().type() == IdentToken)
>- namespacePrefix = prelude.consumeIncludingWhitespace().value().toAtomicString();
>+ namespacePrefix = prelude.consumeIncludingWhitespace().value().toAtomString();
> 
>- AtomicString uri(consumeStringOrURI(prelude));
>+ AtomString uri(consumeStringOrURI(prelude));
> if (uri.isNull() || !prelude.atEnd())
> return nullptr; // Parse error, expected string or URI
> 
>@@ -822,7 +822,7 @@ void CSSParserImpl::consumeDeclaration(CSSParserTokenRange range, StyleRule::Typ
> 
> size_t propertiesCount = m_parsedProperties.size();
> if (propertyID == CSSPropertyInvalid && CSSVariableParser::isValidVariableName(token)) {
>- AtomicString variableName = token.value().toAtomicString();
>+ AtomString variableName = token.value().toAtomString();
> consumeCustomPropertyValue(range.makeSubRange(&range.peek(), declarationValueEnd), variableName, important);
> }
> 
>@@ -839,7 +839,7 @@ void CSSParserImpl::consumeDeclaration(CSSParserTokenRange range, StyleRule::Typ
> }
> }
> 
>-void CSSParserImpl::consumeCustomPropertyValue(CSSParserTokenRange range, const AtomicString& variableName, bool important)
>+void CSSParserImpl::consumeCustomPropertyValue(CSSParserTokenRange range, const AtomString& variableName, bool important)
> {
> if (RefPtr<CSSCustomPropertyValue> value = CSSVariableParser::parseDeclarationValue(variableName, range, m_context))
> m_parsedProperties.append(CSSProperty(CSSPropertyCustom, WTFMove(value), important));
>diff --git a/Source/WebCore/css/parser/CSSParserImpl.h b/Source/WebCore/css/parser/CSSParserImpl.h
>index 36e37905e27bd3bc664506595297c218bcc92d78..115843049390c1559742b2a106ae1711698aaa76 100644
>--- a/Source/WebCore/css/parser/CSSParserImpl.h
>+++ b/Source/WebCore/css/parser/CSSParserImpl.h
>@@ -83,7 +83,7 @@ public:
> };
> 
> static CSSParser::ParseResult parseValue(MutableStyleProperties*, CSSPropertyID, const String&, bool important, const CSSParserContext&);
>- static CSSParser::ParseResult parseCustomPropertyValue(MutableStyleProperties*, const AtomicString& propertyName, const String&, bool important, const CSSParserContext&);
>+ static CSSParser::ParseResult parseCustomPropertyValue(MutableStyleProperties*, const AtomString& propertyName, const String&, bool important, const CSSParserContext&);
> static Ref<ImmutableStyleProperties> parseInlineStyleDeclaration(const String&, const Element*);
> static bool parseDeclarationList(MutableStyleProperties*, const String&, const CSSParserContext&);
> static RefPtr<StyleRuleBase> parseRule(const String&, const CSSParserContext&, StyleSheetContents*, AllowedRulesType);
>@@ -141,7 +141,7 @@ private:
> void consumeDeclarationList(CSSParserTokenRange, StyleRule::Type);
> void consumeDeclaration(CSSParserTokenRange, StyleRule::Type);
> void consumeDeclarationValue(CSSParserTokenRange, CSSPropertyID, bool important, StyleRule::Type);
>- void consumeCustomPropertyValue(CSSParserTokenRange, const AtomicString& propertyName, bool important);
>+ void consumeCustomPropertyValue(CSSParserTokenRange, const AtomString& propertyName, bool important);
> 
> static std::unique_ptr<Vector<double>> consumeKeyframeKeyList(CSSParserTokenRange);
> 
>diff --git a/Source/WebCore/css/parser/CSSParserSelector.cpp b/Source/WebCore/css/parser/CSSParserSelector.cpp
>index 1af424eac9ff3b70f52fe5e6b32417419c11b7a3..97393c94748a37f7fea954a65607de30f9a07930 100644
>--- a/Source/WebCore/css/parser/CSSParserSelector.cpp
>+++ b/Source/WebCore/css/parser/CSSParserSelector.cpp
>@@ -32,7 +32,7 @@
> 
> namespace WebCore {
> 
>-CSSParserSelector* CSSParserSelector::parsePagePseudoSelector(const AtomicString& pseudoTypeString)
>+CSSParserSelector* CSSParserSelector::parsePagePseudoSelector(const AtomString& pseudoTypeString)
> {
> CSSSelector::PagePseudoClassType pseudoType;
> if (equalLettersIgnoringASCIICase(pseudoTypeString, "first"))
>@@ -52,7 +52,7 @@ CSSParserSelector* CSSParserSelector::parsePagePseudoSelector(const AtomicString
> 
> CSSParserSelector* CSSParserSelector::parsePseudoElementSelectorFromStringView(StringView& pseudoTypeString)
> {
>- AtomicString name = pseudoTypeString.toAtomicString();
>+ AtomString name = pseudoTypeString.toAtomString();
> 
> CSSSelector::PseudoElementType pseudoType = CSSSelector::parsePseudoElementType(name);
> if (pseudoType == CSSSelector::PseudoElementUnknown) {
>@@ -71,7 +71,7 @@ CSSParserSelector* CSSParserSelector::parsePseudoElementSelectorFromStringView(S
> if (pseudoType == CSSSelector::PseudoElementWebKitCustomLegacyPrefixed) {
> ASSERT_WITH_MESSAGE(name == "-webkit-input-placeholder", "-webkit-input-placeholder is the only LegacyPrefix pseudo type.");
> if (name == "-webkit-input-placeholder")
>- name = AtomicString("placeholder", AtomicString::ConstructFromLiteral);
>+ name = AtomString("placeholder", AtomString::ConstructFromLiteral);
> }
> selector->m_selector->setValue(name);
> return selector.release();
>@@ -90,7 +90,7 @@ CSSParserSelector* CSSParserSelector::parsePseudoClassSelectorFromStringView(Str
> auto selector = std::make_unique<CSSParserSelector>();
> selector->m_selector->setMatch(CSSSelector::PseudoElement);
> selector->m_selector->setPseudoElementType(pseudoType.compatibilityPseudoElement);
>- AtomicString name = pseudoTypeString.toAtomicString();
>+ AtomString name = pseudoTypeString.toAtomString();
> selector->m_selector->setValue(name);
> return selector.release();
> }
>@@ -127,7 +127,7 @@ void CSSParserSelector::adoptSelectorVector(Vector<std::unique_ptr<CSSParserSele
> m_selector->setSelectorList(std::make_unique<CSSSelectorList>(WTFMove(selectorVector)));
> }
> 
>-void CSSParserSelector::setLangArgumentList(std::unique_ptr<Vector<AtomicString>> argumentList)
>+void CSSParserSelector::setLangArgumentList(std::unique_ptr<Vector<AtomString>> argumentList)
> {
> ASSERT_WITH_MESSAGE(!argumentList->isEmpty(), "No CSS Selector takes an empty argument list.");
> m_selector->setLangArgumentList(WTFMove(argumentList));
>diff --git a/Source/WebCore/css/parser/CSSParserSelector.h b/Source/WebCore/css/parser/CSSParserSelector.h
>index 860fda1c1112ab99a3283e3a23c6417cea5727ce..02b9c8556831b38a6e735926d6d3aa1c67a18af6 100644
>--- a/Source/WebCore/css/parser/CSSParserSelector.h
>+++ b/Source/WebCore/css/parser/CSSParserSelector.h
>@@ -22,8 +22,8 @@
> 
> #include "CSSSelector.h"
> #include "CSSValueKeywords.h"
>-#include <wtf/text/AtomicString.h>
>-#include <wtf/text/AtomicStringHash.h>
>+#include <wtf/text/AtomString.h>
>+#include <wtf/text/AtomStringHash.h>
> #include <wtf/text/WTFString.h>
> 
> namespace WebCore {
>@@ -43,7 +43,7 @@ class CSSParserSelector {
> public:
> static CSSParserSelector* parsePseudoClassSelectorFromStringView(StringView&);
> static CSSParserSelector* parsePseudoElementSelectorFromStringView(StringView&);
>- static CSSParserSelector* parsePagePseudoSelector(const AtomicString&);
>+ static CSSParserSelector* parsePagePseudoSelector(const AtomString&);
> 
> CSSParserSelector();
> explicit CSSParserSelector(const QualifiedName&);
>@@ -51,11 +51,11 @@ public:
> 
> std::unique_ptr<CSSSelector> releaseSelector() { return WTFMove(m_selector); }
> 
>- void setValue(const AtomicString& value, bool matchLowerCase = false) { m_selector->setValue(value, matchLowerCase); }
>+ void setValue(const AtomString& value, bool matchLowerCase = false) { m_selector->setValue(value, matchLowerCase); }
> 
> void setAttribute(const QualifiedName& value, bool convertToLowercase, CSSSelector::AttributeMatchType type) { m_selector->setAttribute(value, convertToLowercase, type); }
> 
>- void setArgument(const AtomicString& value) { m_selector->setArgument(value); }
>+ void setArgument(const AtomString& value) { m_selector->setArgument(value); }
> void setNth(int a, int b) { m_selector->setNth(a, b); }
> void setMatch(CSSSelector::Match value) { m_selector->setMatch(value); }
> void setRelation(CSSSelector::RelationType value) { m_selector->setRelation(value); }
>@@ -68,7 +68,7 @@ public:
> void setPseudoElementType(CSSSelector::PseudoElementType type) { m_selector->setPseudoElementType(type); }
> 
> void adoptSelectorVector(Vector<std::unique_ptr<CSSParserSelector>>&&);
>- void setLangArgumentList(std::unique_ptr<Vector<AtomicString>>);
>+ void setLangArgumentList(std::unique_ptr<Vector<AtomString>>);
> void setSelectorList(std::unique_ptr<CSSSelectorList>);
> 
> CSSSelector::PseudoClassType pseudoClassType() const { return m_selector->pseudoClassType(); }
>diff --git a/Source/WebCore/css/parser/CSSPropertyParser.cpp b/Source/WebCore/css/parser/CSSPropertyParser.cpp
>index fb8b5e694cb350e589797bfad26243627765b825..902da151c0360a87f900032da8d5d7c4f856cd20 100644
>--- a/Source/WebCore/css/parser/CSSPropertyParser.cpp
>+++ b/Source/WebCore/css/parser/CSSPropertyParser.cpp
>@@ -2197,7 +2197,7 @@ static RefPtr<CSSValue> consumeAttr(CSSParserTokenRange args, CSSParserContext c
> return nullptr;
> 
> CSSParserToken token = args.consumeIncludingWhitespace();
>- auto attrName = token.value().toAtomicString();
>+ auto attrName = token.value().toAtomString();
> if (context.isHTMLDocument)
> attrName = attrName.convertToASCIILowercase();
> 
>diff --git a/Source/WebCore/css/parser/CSSPropertyParserHelpers.cpp b/Source/WebCore/css/parser/CSSPropertyParserHelpers.cpp
>index 8b939aaaa3d66d3d88fc429349f5dd5c9eaf060e..2005fc02a99d6b2ec6b6f019919732115d93e6a1 100644
>--- a/Source/WebCore/css/parser/CSSPropertyParserHelpers.cpp
>+++ b/Source/WebCore/css/parser/CSSPropertyParserHelpers.cpp
>@@ -1444,7 +1444,7 @@ static RefPtr<CSSValue> consumeImageSet(CSSParserTokenRange& range, const CSSPar
> CSSParserTokenRange args = consumeFunction(rangeCopy);
> RefPtr<CSSImageSetValue> imageSet = CSSImageSetValue::create(context.isContentOpaque ? LoadedFromOpaqueSource::Yes : LoadedFromOpaqueSource::No);
> do {
>- AtomicString urlValue = consumeUrlAsStringView(args).toAtomicString();
>+ AtomString urlValue = consumeUrlAsStringView(args).toAtomString();
> if (urlValue.isNull())
> return nullptr;
> 
>@@ -1661,7 +1661,7 @@ RefPtr<CSSShadowValue> consumeSingleShadow(CSSParserTokenRange& range, CSSParser
> 
> RefPtr<CSSValue> consumeImage(CSSParserTokenRange& range, CSSParserContext context, ConsumeGeneratedImage generatedImage)
> {
>- AtomicString uri = consumeUrlAsStringView(range).toAtomicString();
>+ AtomString uri = consumeUrlAsStringView(range).toAtomString();
> if (!uri.isNull())
> return CSSImageValue::create(completeURL(context, uri), context.isContentOpaque ? LoadedFromOpaqueSource::Yes : LoadedFromOpaqueSource::No);
> 
>diff --git a/Source/WebCore/css/parser/CSSSelectorParser.cpp b/Source/WebCore/css/parser/CSSSelectorParser.cpp
>index 98d75c5c9b91f3f94dee2add8f70caa2d2e462bf..ecd003670c4c4e405da6d833d003310d2aeaf25b 100644
>--- a/Source/WebCore/css/parser/CSSSelectorParser.cpp
>+++ b/Source/WebCore/css/parser/CSSSelectorParser.cpp
>@@ -95,7 +95,7 @@ CSSSelectorList CSSSelectorParser::consumeCompoundSelectorList(CSSParserTokenRan
> return CSSSelectorList { WTFMove(selectorList) };
> }
> 
>-static bool consumeLangArgumentList(std::unique_ptr<Vector<AtomicString>>& argumentList, CSSParserTokenRange& range)
>+static bool consumeLangArgumentList(std::unique_ptr<Vector<AtomString>>& argumentList, CSSParserTokenRange& range)
> {
> const CSSParserToken& ident = range.consumeIncludingWhitespace();
> if (ident.type() != IdentToken && ident.type() != StringToken)
>@@ -103,7 +103,7 @@ static bool consumeLangArgumentList(std::unique_ptr<Vector<AtomicString>>& argum
> StringView string = ident.value();
> if (string.startsWith("--"))
> return false;
>- argumentList->append(string.toAtomicString());
>+ argumentList->append(string.toAtomString());
> while (!range.atEnd() && range.peek().type() == CommaToken) {
> range.consumeIncludingWhitespace();
> const CSSParserToken& ident = range.consumeIncludingWhitespace();
>@@ -112,7 +112,7 @@ static bool consumeLangArgumentList(std::unique_ptr<Vector<AtomicString>>& argum
> StringView string = ident.value();
> if (string.startsWith("--"))
> return false;
>- argumentList->append(string.toAtomicString());
>+ argumentList->append(string.toAtomString());
> }
> return range.atEnd();
> }
>@@ -260,8 +260,8 @@ std::unique_ptr<CSSParserSelector> CSSSelectorParser::consumeCompoundSelector(CS
> {
> std::unique_ptr<CSSParserSelector> compoundSelector;
> 
>- AtomicString namespacePrefix;
>- AtomicString elementName;
>+ AtomString namespacePrefix;
>+ AtomString elementName;
> CSSSelector::PseudoElementType compoundPseudoElement = CSSSelector::PseudoElementUnknown;
> if (!consumeName(range, elementName, namespacePrefix)) {
> compoundSelector = consumeSimpleSelector(range);
>@@ -289,7 +289,7 @@ std::unique_ptr<CSSParserSelector> CSSSelectorParser::consumeCompoundSelector(CS
> }
> 
> if (!compoundSelector) {
>- AtomicString namespaceURI = determineNamespace(namespacePrefix);
>+ AtomString namespaceURI = determineNamespace(namespacePrefix);
> if (namespaceURI.isNull()) {
> m_failedParsing = true;
> return nullptr;
>@@ -324,14 +324,14 @@ std::unique_ptr<CSSParserSelector> CSSSelectorParser::consumeSimpleSelector(CSSP
> return selector;
> }
> 
>-bool CSSSelectorParser::consumeName(CSSParserTokenRange& range, AtomicString& name, AtomicString& namespacePrefix)
>+bool CSSSelectorParser::consumeName(CSSParserTokenRange& range, AtomString& name, AtomString& namespacePrefix)
> {
> name = nullAtom();
> namespacePrefix = nullAtom();
> 
> const CSSParserToken& firstToken = range.peek();
> if (firstToken.type() == IdentToken) {
>- name = firstToken.value().toAtomicString();
>+ name = firstToken.value().toAtomString();
> range.consume();
> } else if (firstToken.type() == DelimiterToken && firstToken.delimiter() == '*') {
> name = starAtom();
>@@ -349,7 +349,7 @@ bool CSSSelectorParser::consumeName(CSSParserTokenRange& range, AtomicString& na
> namespacePrefix = name;
> const CSSParserToken& nameToken = range.consume();
> if (nameToken.type() == IdentToken) {
>- name = nameToken.value().toAtomicString();
>+ name = nameToken.value().toAtomString();
> } else if (nameToken.type() == DelimiterToken && nameToken.delimiter() == '*')
> name = starAtom();
> else {
>@@ -372,7 +372,7 @@ std::unique_ptr<CSSParserSelector> CSSSelectorParser::consumeId(CSSParserTokenRa
> // FIXME-NEWPARSER: Avoid having to do this, but the old parser does and we need
> // to be compatible for now.
> CSSParserToken token = range.consume();
>- selector->setValue(token.value().toAtomicString(), m_context.mode == HTMLQuirksMode);
>+ selector->setValue(token.value().toAtomString(), m_context.mode == HTMLQuirksMode);
> return selector;
> }
> 
>@@ -389,7 +389,7 @@ std::unique_ptr<CSSParserSelector> CSSSelectorParser::consumeClass(CSSParserToke
> // FIXME-NEWPARSER: Avoid having to do this, but the old parser does and we need
> // to be compatible for now.
> CSSParserToken token = range.consume();
>- selector->setValue(token.value().toAtomicString(), m_context.mode == HTMLQuirksMode);
>+ selector->setValue(token.value().toAtomString(), m_context.mode == HTMLQuirksMode);
> 
> return selector;
> }
>@@ -400,13 +400,13 @@ std::unique_ptr<CSSParserSelector> CSSSelectorParser::consumeAttribute(CSSParser
> CSSParserTokenRange block = range.consumeBlock();
> block.consumeWhitespace();
> 
>- AtomicString namespacePrefix;
>- AtomicString attributeName;
>+ AtomString namespacePrefix;
>+ AtomString attributeName;
> if (!consumeName(block, attributeName, namespacePrefix))
> return nullptr;
> block.consumeWhitespace();
> 
>- AtomicString namespaceURI = determineNamespace(namespacePrefix);
>+ AtomString namespaceURI = determineNamespace(namespacePrefix);
> if (namespaceURI.isNull())
> return nullptr;
> 
>@@ -427,7 +427,7 @@ std::unique_ptr<CSSParserSelector> CSSSelectorParser::consumeAttribute(CSSParser
> const CSSParserToken& attributeValue = block.consumeIncludingWhitespace();
> if (attributeValue.type() != IdentToken && attributeValue.type() != StringToken)
> return nullptr;
>- selector->setValue(attributeValue.value().toAtomicString());
>+ selector->setValue(attributeValue.value().toAtomString());
> 
> selector->setAttribute(qualifiedName, m_context.isHTMLDocument, consumeAttributeFlags(block));
> 
>@@ -567,7 +567,7 @@ std::unique_ptr<CSSParserSelector> CSSSelectorParser::consumePseudo(CSSParserTok
> }
> case CSSSelector::PseudoClassLang: {
> // FIXME: CSS Selectors Level 4 allows :lang(*-foo)
>- auto argumentList = std::make_unique<Vector<AtomicString>>();
>+ auto argumentList = std::make_unique<Vector<AtomString>>();
> if (!consumeLangArgumentList(argumentList, block))
> return nullptr;
> selector->setLangArgumentList(WTFMove(argumentList));
>@@ -596,7 +596,7 @@ std::unique_ptr<CSSParserSelector> CSSSelectorParser::consumePseudo(CSSParserTok
> const CSSParserToken& ident = block.consumeIncludingWhitespace();
> if (ident.type() != IdentToken || !block.atEnd())
> return nullptr;
>- selector->setArgument(ident.value().toAtomicString());
>+ selector->setArgument(ident.value().toAtomString());
> return selector;
> }
> #endif
>@@ -775,14 +775,14 @@ bool CSSSelectorParser::consumeANPlusB(CSSParserTokenRange& range, std::pair<int
> return true;
> }
> 
>-const AtomicString& CSSSelectorParser::defaultNamespace() const
>+const AtomString& CSSSelectorParser::defaultNamespace() const
> {
> if (!m_styleSheet)
> return starAtom();
> return m_styleSheet->defaultNamespace();
> }
> 
>-const AtomicString& CSSSelectorParser::determineNamespace(const AtomicString& prefix)
>+const AtomString& CSSSelectorParser::determineNamespace(const AtomString& prefix)
> {
> if (prefix.isNull())
> return defaultNamespace();
>@@ -795,20 +795,20 @@ const AtomicString& CSSSelectorParser::determineNamespace(const AtomicString& pr
> return m_styleSheet->namespaceURIFromPrefix(prefix);
> }
> 
>-void CSSSelectorParser::prependTypeSelectorIfNeeded(const AtomicString& namespacePrefix, const AtomicString& elementName, CSSParserSelector* compoundSelector)
>+void CSSSelectorParser::prependTypeSelectorIfNeeded(const AtomString& namespacePrefix, const AtomString& elementName, CSSParserSelector* compoundSelector)
> {
> bool isShadowDOM = compoundSelector->needsImplicitShadowCombinatorForMatching();
> 
> if (elementName.isNull() && defaultNamespace() == starAtom() && !isShadowDOM)
> return;
> 
>- AtomicString determinedElementName = elementName.isNull() ? starAtom() : elementName;
>- AtomicString namespaceURI = determineNamespace(namespacePrefix);
>+ AtomString determinedElementName = elementName.isNull() ? starAtom() : elementName;
>+ AtomString namespaceURI = determineNamespace(namespacePrefix);
> if (namespaceURI.isNull()) {
> m_failedParsing = true;
> return;
> }
>- AtomicString determinedPrefix = namespacePrefix;
>+ AtomString determinedPrefix = namespacePrefix;
> if (namespaceURI == defaultNamespace())
> determinedPrefix = nullAtom();
> QualifiedName tag = QualifiedName(determinedPrefix, determinedElementName, namespaceURI);
>diff --git a/Source/WebCore/css/parser/CSSSelectorParser.h b/Source/WebCore/css/parser/CSSSelectorParser.h
>index 283028737c7c20b469a21ae7252f361c24563345..521e1da8e2a890e83afbd0c6d2cdde2c60f1fd47 100644
>--- a/Source/WebCore/css/parser/CSSSelectorParser.h
>+++ b/Source/WebCore/css/parser/CSSSelectorParser.h
>@@ -60,7 +60,7 @@ private:
> // This doesn't include element names, since they're handled specially
> std::unique_ptr<CSSParserSelector> consumeSimpleSelector(CSSParserTokenRange&);
> 
>- bool consumeName(CSSParserTokenRange&, AtomicString& name, AtomicString& namespacePrefix);
>+ bool consumeName(CSSParserTokenRange&, AtomString& name, AtomString& namespacePrefix);
> 
> // These will return nullptr when the selector is invalid
> std::unique_ptr<CSSParserSelector> consumeId(CSSParserTokenRange&);
>@@ -72,9 +72,9 @@ private:
> CSSSelector::Match consumeAttributeMatch(CSSParserTokenRange&);
> CSSSelector::AttributeMatchType consumeAttributeFlags(CSSParserTokenRange&);
> 
>- const AtomicString& defaultNamespace() const;
>- const AtomicString& determineNamespace(const AtomicString& prefix);
>- void prependTypeSelectorIfNeeded(const AtomicString& namespacePrefix, const AtomicString& elementName, CSSParserSelector*);
>+ const AtomString& defaultNamespace() const;
>+ const AtomString& determineNamespace(const AtomString& prefix);
>+ void prependTypeSelectorIfNeeded(const AtomString& namespacePrefix, const AtomString& elementName, CSSParserSelector*);
> static std::unique_ptr<CSSParserSelector> addSimpleSelectorToCompound(std::unique_ptr<CSSParserSelector> compoundSelector, std::unique_ptr<CSSParserSelector> simpleSelector);
> static std::unique_ptr<CSSParserSelector> splitCompoundAtImplicitShadowCrossingCombinator(std::unique_ptr<CSSParserSelector> compoundSelector, const CSSParserContext&);
> 
>diff --git a/Source/WebCore/css/parser/CSSVariableParser.cpp b/Source/WebCore/css/parser/CSSVariableParser.cpp
>index 1be23b9fec8f5ecdad4eb844853f9e02ca5a920d..1f3b33affe768e419955f029f58f64823f92f079 100644
>--- a/Source/WebCore/css/parser/CSSVariableParser.cpp
>+++ b/Source/WebCore/css/parser/CSSVariableParser.cpp
>@@ -177,7 +177,7 @@ bool CSSVariableParser::containsValidVariableReferences(CSSParserTokenRange rang
> return type == CSSValueInternalVariableValue && hasReferences && !hasAtApplyRule;
> }
> 
>-RefPtr<CSSCustomPropertyValue> CSSVariableParser::parseDeclarationValue(const AtomicString& variableName, CSSParserTokenRange range, const CSSParserContext& parserContext)
>+RefPtr<CSSCustomPropertyValue> CSSVariableParser::parseDeclarationValue(const AtomString& variableName, CSSParserTokenRange range, const CSSParserContext& parserContext)
> {
> if (range.atEnd())
> return nullptr;
>diff --git a/Source/WebCore/css/parser/CSSVariableParser.h b/Source/WebCore/css/parser/CSSVariableParser.h
>index c10c44c27d94ca796c9d35f0eb32a2606bffdfa6..3de1c1663fced6a4a467887619bc3b7f7ca0b337 100644
>--- a/Source/WebCore/css/parser/CSSVariableParser.h
>+++ b/Source/WebCore/css/parser/CSSVariableParser.h
>@@ -31,7 +31,7 @@
> 
> #include "CSSParserTokenRange.h"
> #include <wtf/RefPtr.h>
>-#include <wtf/text/AtomicString.h>
>+#include <wtf/text/AtomString.h>
> 
> namespace WebCore {
> 
>@@ -42,7 +42,7 @@ class CSSVariableParser {
> public:
> static bool containsValidVariableReferences(CSSParserTokenRange, const CSSParserContext&);
> 
>- static RefPtr<CSSCustomPropertyValue> parseDeclarationValue(const AtomicString&, CSSParserTokenRange, const CSSParserContext&);
>+ static RefPtr<CSSCustomPropertyValue> parseDeclarationValue(const AtomString&, CSSParserTokenRange, const CSSParserContext&);
> 
> static bool isValidVariableName(const CSSParserToken&);
> static bool isValidVariableName(const String&);
>diff --git a/Source/WebCore/cssjit/SelectorCompiler.cpp b/Source/WebCore/cssjit/SelectorCompiler.cpp
>index 2a43fd8200baf38a127545bdae1b1a32294c626a..114879094fa06e4561b82ec14050bbcc7f38c7cc 100644
>--- a/Source/WebCore/cssjit/SelectorCompiler.cpp
>+++ b/Source/WebCore/cssjit/SelectorCompiler.cpp
>@@ -197,9 +197,9 @@ struct SelectorFragment {
> // FIXME: the large stack allocation caused by the inline capacity causes memory inefficiency. We should dump
> // the min/max/average of the vectors and pick better inline capacity.
> const CSSSelector* tagNameSelector = nullptr;
>- const AtomicString* id = nullptr;
>- Vector<const Vector<AtomicString>*> languageArgumentsList;
>- Vector<const AtomicStringImpl*, 8> classNames;
>+ const AtomString* id = nullptr;
>+ Vector<const Vector<AtomString>*> languageArgumentsList;
>+ Vector<const AtomStringImpl*, 8> classNames;
> HashSet<unsigned> pseudoClasses;
> Vector<JSC::FunctionPtr<CSSOperationPtrTag>, 4> unoptimizedPseudoClasses;
> Vector<JSC::FunctionPtr<CSSOperationPtrTag>, 4> unoptimizedPseudoClassesWithContext;
>@@ -300,7 +300,7 @@ private:
> void generateElementIsFirstChild(Assembler::JumpList& failureCases);
> void generateElementIsHovered(Assembler::JumpList& failureCases, const SelectorFragment&);
> void generateElementIsInLanguage(Assembler::JumpList& failureCases, const SelectorFragment&);
>- void generateElementIsInLanguage(Assembler::JumpList& failureCases, const Vector<AtomicString>*);
>+ void generateElementIsInLanguage(Assembler::JumpList& failureCases, const Vector<AtomString>*);
> void generateElementIsLastChild(Assembler::JumpList& failureCases);
> void generateElementIsOnlyChild(Assembler::JumpList& failureCases);
> void generateElementHasPlaceholderShown(Assembler::JumpList& failureCases);
>@@ -309,11 +309,11 @@ private:
> void generateElementAttributesMatching(Assembler::JumpList& failureCases, const LocalRegister& elementDataAddress, const SelectorFragment&);
> void generateElementAttributeMatching(Assembler::JumpList& failureCases, Assembler::RegisterID currentAttributeAddress, Assembler::RegisterID decIndexRegister, const AttributeMatchingInfo& attributeInfo);
> void generateElementAttributeValueMatching(Assembler::JumpList& failureCases, Assembler::RegisterID currentAttributeAddress, const AttributeMatchingInfo& attributeInfo);
>- void generateElementAttributeValueExactMatching(Assembler::JumpList& failureCases, Assembler::RegisterID currentAttributeAddress, const AtomicString& expectedValue, AttributeCaseSensitivity valueCaseSensitivity);
>- void generateElementAttributeFunctionCallValueMatching(Assembler::JumpList& failureCases, Assembler::RegisterID currentAttributeAddress, const AtomicString& expectedValue, AttributeCaseSensitivity valueCaseSensitivity, JSC::FunctionPtr<CSSOperationPtrTag> caseSensitiveTest, JSC::FunctionPtr<CSSOperationPtrTag> caseInsensitiveTest);
>+ void generateElementAttributeValueExactMatching(Assembler::JumpList& failureCases, Assembler::RegisterID currentAttributeAddress, const AtomString& expectedValue, AttributeCaseSensitivity valueCaseSensitivity);
>+ void generateElementAttributeFunctionCallValueMatching(Assembler::JumpList& failureCases, Assembler::RegisterID currentAttributeAddress, const AtomString& expectedValue, AttributeCaseSensitivity valueCaseSensitivity, JSC::FunctionPtr<CSSOperationPtrTag> caseSensitiveTest, JSC::FunctionPtr<CSSOperationPtrTag> caseInsensitiveTest);
> void generateElementHasTagName(Assembler::JumpList& failureCases, const CSSSelector& tagMatchingSelector);
>- void generateElementHasId(Assembler::JumpList& failureCases, const LocalRegister& elementDataAddress, const AtomicString& idToMatch);
>- void generateElementHasClasses(Assembler::JumpList& failureCases, const LocalRegister& elementDataAddress, const Vector<const AtomicStringImpl*, 8>& classNames);
>+ void generateElementHasId(Assembler::JumpList& failureCases, const LocalRegister& elementDataAddress, const AtomString& idToMatch);
>+ void generateElementHasClasses(Assembler::JumpList& failureCases, const LocalRegister& elementDataAddress, const Vector<const AtomStringImpl*, 8>& classNames);
> void generateElementIsLink(Assembler::JumpList& failureCases);
> void generateElementIsNthChild(Assembler::JumpList& failureCases, const SelectorFragment&);
> void generateElementIsNthChildOf(Assembler::JumpList& failureCases, const SelectorFragment&);
>@@ -781,7 +781,7 @@ static inline FunctionType addPseudoClassType(const CSSSelector& selector, Selec
> 
> case CSSSelector::PseudoClassLang:
> {
>- const Vector<AtomicString>* selectorLangArgumentList = selector.langArgumentList();
>+ const Vector<AtomString>* selectorLangArgumentList = selector.langArgumentList();
> ASSERT(selectorLangArgumentList && !selectorLangArgumentList->isEmpty());
> fragment.languageArgumentsList.append(selectorLangArgumentList);
> return FunctionType::SimpleSelectorChecker;
>@@ -917,7 +917,7 @@ static FunctionType constructFragmentsInternal(const CSSSelector* rootSelector,
> fragment->onlyMatchesLinksInQuirksMode = false;
> break;
> case CSSSelector::Id: {
>- const AtomicString& id = selector->value();
>+ const AtomString& id = selector->value();
> if (fragment->id) {
> if (id != *fragment->id)
> return FunctionType::CannotMatchAnything;
>@@ -1404,11 +1404,11 @@ static inline TagNameEquality equalTagNames(const CSSSelector* lhs, const CSSSel
> if (rhsQualifiedName == anyQName())
> return TagNameEquality::MaybeEqual;
> 
>- const AtomicString& lhsLocalName = lhsQualifiedName.localName();
>- const AtomicString& rhsLocalName = rhsQualifiedName.localName();
>+ const AtomString& lhsLocalName = lhsQualifiedName.localName();
>+ const AtomString& rhsLocalName = rhsQualifiedName.localName();
> if (lhsLocalName != starAtom() && rhsLocalName != starAtom()) {
>- const AtomicString& lhsLowercaseLocalName = lhs->tagLowercaseLocalName();
>- const AtomicString& rhsLowercaseLocalName = rhs->tagLowercaseLocalName();
>+ const AtomString& lhsLowercaseLocalName = lhs->tagLowercaseLocalName();
>+ const AtomString& rhsLowercaseLocalName = rhs->tagLowercaseLocalName();
> 
> if (lhsLowercaseLocalName != rhsLowercaseLocalName)
> return TagNameEquality::StrictlyNotEqual;
>@@ -1418,8 +1418,8 @@ static inline TagNameEquality equalTagNames(const CSSSelector* lhs, const CSSSel
> return TagNameEquality::MaybeEqual;
> }
> 
>- const AtomicString& lhsNamespaceURI = lhsQualifiedName.namespaceURI();
>- const AtomicString& rhsNamespaceURI = rhsQualifiedName.namespaceURI();
>+ const AtomString& lhsNamespaceURI = lhsQualifiedName.namespaceURI();
>+ const AtomString& rhsNamespaceURI = rhsQualifiedName.namespaceURI();
> if (lhsNamespaceURI != starAtom() && rhsNamespaceURI != starAtom()) {
> if (lhsNamespaceURI != rhsNamespaceURI)
> return TagNameEquality::StrictlyNotEqual;
>@@ -2697,7 +2697,7 @@ static inline bool canMatchStyleAttribute(const SelectorFragment& fragment)
> if (Attribute::nameMatchesFilter(HTMLNames::styleAttr, attributeName.prefix(), attributeName.localName(), attributeName.namespaceURI()))
> return true;
> 
>- const AtomicString& canonicalLocalName = attributeSelector.attributeCanonicalLocalName();
>+ const AtomString& canonicalLocalName = attributeSelector.attributeCanonicalLocalName();
> if (attributeName.localName() != canonicalLocalName
> && Attribute::nameMatchesFilter(HTMLNames::styleAttr, attributeName.prefix(), attributeSelector.attributeCanonicalLocalName(), attributeName.namespaceURI())) {
> return true;
>@@ -2730,7 +2730,7 @@ static inline bool canMatchAnimatableSVGAttribute(const SelectorFragment& fragme
> if (Attribute::nameMatchesFilter(candidateForLocalName, selectorAttributeName.prefix(), selectorAttributeName.localName(), selectorAttributeName.namespaceURI()))
> return true;
> 
>- const AtomicString& canonicalLocalName = attributeSelector.attributeCanonicalLocalName();
>+ const AtomString& canonicalLocalName = attributeSelector.attributeCanonicalLocalName();
> if (selectorAttributeName.localName() != canonicalLocalName) {
> const QualifiedName& candidateForCanonicalLocalName = SVGElement::animatableAttributeForName(selectorAttributeName.localName());
> if (Attribute::nameMatchesFilter(candidateForCanonicalLocalName, selectorAttributeName.prefix(), selectorAttributeName.localName(), selectorAttributeName.namespaceURI()))
>@@ -2825,8 +2825,8 @@ void SelectorCodeGenerator::generateElementAttributeMatching(Assembler::JumpList
> // In general, canonicalLocalName and localName are the same. When they differ, we have to check if the node is HTML to know
> // which one to use.
> const CSSSelector& attributeSelector = attributeInfo.selector();
>- const AtomicStringImpl* canonicalLocalName = attributeSelector.attributeCanonicalLocalName().impl();
>- const AtomicStringImpl* localName = attributeSelector.attribute().localName().impl();
>+ const AtomStringImpl* canonicalLocalName = attributeSelector.attributeCanonicalLocalName().impl();
>+ const AtomStringImpl* localName = attributeSelector.attribute().localName().impl();
> if (canonicalLocalName == localName)
> m_assembler.move(Assembler::TrustedImmPtr(canonicalLocalName), localNameToMatch);
> else {
>@@ -2847,7 +2847,7 @@ void SelectorCodeGenerator::generateElementAttributeMatching(Assembler::JumpList
> if (shouldCheckNamespace) {
> Assembler::Jump nameDoesNotMatch = m_assembler.branchPtr(Assembler::NotEqual, Assembler::Address(qualifiedNameImpl, QualifiedName::QualifiedNameImpl::localNameMemoryOffset()), localNameToMatch);
> 
>- const AtomicStringImpl* namespaceURI = attributeSelector.attribute().namespaceURI().impl();
>+ const AtomStringImpl* namespaceURI = attributeSelector.attribute().namespaceURI().impl();
> if (namespaceURI) {
> LocalRegister namespaceToMatch(m_registerAllocator);
> m_assembler.move(Assembler::TrustedImmPtr(namespaceURI), namespaceToMatch);
>@@ -2886,42 +2886,42 @@ enum CaseSensitivity {
> };
> 
> template<CaseSensitivity caseSensitivity>
>-static bool attributeValueBeginsWith(const Attribute* attribute, AtomicStringImpl* expectedString)
>+static bool attributeValueBeginsWith(const Attribute* attribute, AtomStringImpl* expectedString)
> {
> ASSERT(expectedString);
> 
>- AtomicStringImpl& valueImpl = *attribute->value().impl();
>+ AtomStringImpl& valueImpl = *attribute->value().impl();
> if (caseSensitivity == CaseSensitive)
> return valueImpl.startsWith(*expectedString);
> return valueImpl.startsWithIgnoringASCIICase(*expectedString);
> }
> 
> template<CaseSensitivity caseSensitivity>
>-static bool attributeValueContains(const Attribute* attribute, AtomicStringImpl* expectedString)
>+static bool attributeValueContains(const Attribute* attribute, AtomStringImpl* expectedString)
> {
>- AtomicStringImpl& valueImpl = *attribute->value().impl();
>+ AtomStringImpl& valueImpl = *attribute->value().impl();
> if (caseSensitivity == CaseSensitive)
> return valueImpl.find(expectedString) != notFound;
> return valueImpl.findIgnoringASCIICase(expectedString) != notFound;
> }
> 
> template<CaseSensitivity caseSensitivity>
>-static bool attributeValueEndsWith(const Attribute* attribute, AtomicStringImpl* expectedString)
>+static bool attributeValueEndsWith(const Attribute* attribute, AtomStringImpl* expectedString)
> {
> ASSERT(expectedString);
> 
>- AtomicStringImpl& valueImpl = *attribute->value().impl();
>+ AtomStringImpl& valueImpl = *attribute->value().impl();
> if (caseSensitivity == CaseSensitive)
> return valueImpl.endsWith(*expectedString);
> return valueImpl.endsWithIgnoringASCIICase(*expectedString);
> }
> 
> template<CaseSensitivity caseSensitivity>
>-static bool attributeValueMatchHyphenRule(const Attribute* attribute, AtomicStringImpl* expectedString)
>+static bool attributeValueMatchHyphenRule(const Attribute* attribute, AtomStringImpl* expectedString)
> {
> ASSERT(expectedString);
> 
>- AtomicStringImpl& valueImpl = *attribute->value().impl();
>+ AtomStringImpl& valueImpl = *attribute->value().impl();
> if (valueImpl.length() < expectedString->length())
> return false;
> 
>@@ -2938,9 +2938,9 @@ static bool attributeValueMatchHyphenRule(const Attribute* attribute, AtomicStri
> }
> 
> template<CaseSensitivity caseSensitivity>
>-static bool attributeValueSpaceSeparetedListContains(const Attribute* attribute, AtomicStringImpl* expectedString)
>+static bool attributeValueSpaceSeparetedListContains(const Attribute* attribute, AtomStringImpl* expectedString)
> {
>- AtomicStringImpl& value = *attribute->value().impl();
>+ AtomStringImpl& value = *attribute->value().impl();
> 
> unsigned startSearchAt = 0;
> while (true) {
>@@ -2964,7 +2964,7 @@ static bool attributeValueSpaceSeparetedListContains(const Attribute* attribute,
> void SelectorCodeGenerator::generateElementAttributeValueMatching(Assembler::JumpList& failureCases, Assembler::RegisterID currentAttributeAddress, const AttributeMatchingInfo& attributeInfo)
> {
> const CSSSelector& attributeSelector = attributeInfo.selector();
>- const AtomicString& expectedValue = attributeSelector.value();
>+ const AtomString& expectedValue = attributeSelector.value();
> ASSERT(!expectedValue.isNull());
> AttributeCaseSensitivity valueCaseSensitivity = attributeInfo.attributeCaseSensitivity();
> 
>@@ -2997,7 +2997,7 @@ static inline Assembler::Jump testIsHTMLClassOnDocument(Assembler::ResultConditi
> return assembler.branchTest32(condition, Assembler::Address(documentAddress, Document::documentClassesMemoryOffset()), Assembler::TrustedImm32(Document::isHTMLDocumentClassFlag()));
> }
> 
>-void SelectorCodeGenerator::generateElementAttributeValueExactMatching(Assembler::JumpList& failureCases, Assembler::RegisterID currentAttributeAddress, const AtomicString& expectedValue, AttributeCaseSensitivity valueCaseSensitivity)
>+void SelectorCodeGenerator::generateElementAttributeValueExactMatching(Assembler::JumpList& failureCases, Assembler::RegisterID currentAttributeAddress, const AtomString& expectedValue, AttributeCaseSensitivity valueCaseSensitivity)
> {
> LocalRegisterWithPreference expectedValueRegister(m_registerAllocator, JSC::GPRInfo::argumentGPR1);
> m_assembler.move(Assembler::TrustedImmPtr(expectedValue.impl()), expectedValueRegister);
>@@ -3047,7 +3047,7 @@ void SelectorCodeGenerator::generateElementAttributeValueExactMatching(Assembler
> }
> }
> 
>-void SelectorCodeGenerator::generateElementAttributeFunctionCallValueMatching(Assembler::JumpList& failureCases, Assembler::RegisterID currentAttributeAddress, const AtomicString& expectedValue, AttributeCaseSensitivity valueCaseSensitivity, JSC::FunctionPtr<CSSOperationPtrTag> caseSensitiveTest, JSC::FunctionPtr<CSSOperationPtrTag> caseInsensitiveTest)
>+void SelectorCodeGenerator::generateElementAttributeFunctionCallValueMatching(Assembler::JumpList& failureCases, Assembler::RegisterID currentAttributeAddress, const AtomString& expectedValue, AttributeCaseSensitivity valueCaseSensitivity, JSC::FunctionPtr<CSSOperationPtrTag> caseSensitiveTest, JSC::FunctionPtr<CSSOperationPtrTag> caseInsensitiveTest)
> {
> LocalRegisterWithPreference expectedValueRegister(m_registerAllocator, JSC::GPRInfo::argumentGPR1);
> m_assembler.move(Assembler::TrustedImmPtr(expectedValue.impl()), expectedValueRegister);
>@@ -3268,11 +3268,11 @@ void SelectorCodeGenerator::generateElementIsHovered(Assembler::JumpList& failur
> 
> void SelectorCodeGenerator::generateElementIsInLanguage(Assembler::JumpList& failureCases, const SelectorFragment& fragment)
> {
>- for (const Vector<AtomicString>* languageArguments : fragment.languageArgumentsList)
>+ for (const Vector<AtomString>* languageArguments : fragment.languageArgumentsList)
> generateElementIsInLanguage(failureCases, languageArguments);
> }
> 
>-void SelectorCodeGenerator::generateElementIsInLanguage(Assembler::JumpList& failureCases, const Vector<AtomicString>* languageArguments)
>+void SelectorCodeGenerator::generateElementIsInLanguage(Assembler::JumpList& failureCases, const Vector<AtomString>* languageArguments)
> {
> LocalRegisterWithPreference langRangeRegister(m_registerAllocator, JSC::GPRInfo::argumentGPR1);
> m_assembler.move(Assembler::TrustedImmPtr(languageArguments), langRangeRegister);
>@@ -3455,9 +3455,9 @@ inline void SelectorCodeGenerator::generateElementHasTagName(Assembler::JumpList
> LocalRegister qualifiedNameImpl(m_registerAllocator);
> m_assembler.loadPtr(Assembler::Address(elementAddressRegister, Element::tagQNameMemoryOffset() + QualifiedName::implMemoryOffset()), qualifiedNameImpl);
> 
>- const AtomicString& selectorLocalName = nameToMatch.localName();
>+ const AtomString& selectorLocalName = nameToMatch.localName();
> if (selectorLocalName != starAtom()) {
>- const AtomicString& lowercaseLocalName = tagMatchingSelector.tagLowercaseLocalName();
>+ const AtomString& lowercaseLocalName = tagMatchingSelector.tagLowercaseLocalName();
> 
> if (selectorLocalName == lowercaseLocalName) {
> // Generate localName == element->localName().
>@@ -3485,7 +3485,7 @@ inline void SelectorCodeGenerator::generateElementHasTagName(Assembler::JumpList
> }
> }
> 
>- const AtomicString& selectorNamespaceURI = nameToMatch.namespaceURI();
>+ const AtomString& selectorNamespaceURI = nameToMatch.namespaceURI();
> if (selectorNamespaceURI != starAtom()) {
> // Generate namespaceURI == element->namespaceURI().
> LocalRegister constantRegister(m_registerAllocator);
>@@ -3494,15 +3494,15 @@ inline void SelectorCodeGenerator::generateElementHasTagName(Assembler::JumpList
> }
> }
> 
>-void SelectorCodeGenerator::generateElementHasId(Assembler::JumpList& failureCases, const LocalRegister& elementDataAddress, const AtomicString& idToMatch)
>+void SelectorCodeGenerator::generateElementHasId(Assembler::JumpList& failureCases, const LocalRegister& elementDataAddress, const AtomString& idToMatch)
> {
>- // Compare the pointers of the AtomicStringImpl from idForStyleResolution with the reference idToMatch.
>+ // Compare the pointers of the AtomStringImpl from idForStyleResolution with the reference idToMatch.
> LocalRegister idToMatchRegister(m_registerAllocator);
> m_assembler.move(Assembler::TrustedImmPtr(idToMatch.impl()), idToMatchRegister);
> failureCases.append(m_assembler.branchPtr(Assembler::NotEqual, Assembler::Address(elementDataAddress, ElementData::idForStyleResolutionMemoryOffset()), idToMatchRegister));
> }
> 
>-void SelectorCodeGenerator::generateElementHasClasses(Assembler::JumpList& failureCases, const LocalRegister& elementDataAddress, const Vector<const AtomicStringImpl*, 8>& classNames)
>+void SelectorCodeGenerator::generateElementHasClasses(Assembler::JumpList& failureCases, const LocalRegister& elementDataAddress, const Vector<const AtomStringImpl*, 8>& classNames)
> {
> // Load m_classNames.
> LocalRegister spaceSplitStringData(m_registerAllocator);
>diff --git a/Source/WebCore/dom/AnimationEvent.cpp b/Source/WebCore/dom/AnimationEvent.cpp
>index c5256671c7808ffc2f23654a94e6cf11a231ccd8..ab332cac59930d625b744cb13b565cbbd495d87a 100644
>--- a/Source/WebCore/dom/AnimationEvent.cpp
>+++ b/Source/WebCore/dom/AnimationEvent.cpp
>@@ -28,14 +28,14 @@
> 
> namespace WebCore {
> 
>-AnimationEvent::AnimationEvent(const AtomicString& type, const Init& initializer, IsTrusted isTrusted)
>+AnimationEvent::AnimationEvent(const AtomString& type, const Init& initializer, IsTrusted isTrusted)
> : Event(type, initializer, isTrusted)
> , m_animationName(initializer.animationName)
> , m_elapsedTime(initializer.elapsedTime)
> {
> }
> 
>-AnimationEvent::AnimationEvent(const AtomicString& type, const String& animationName, double elapsedTime)
>+AnimationEvent::AnimationEvent(const AtomString& type, const String& animationName, double elapsedTime)
> : Event(type, CanBubble::Yes, IsCancelable::No)
> , m_animationName(animationName)
> , m_elapsedTime(elapsedTime)
>diff --git a/Source/WebCore/dom/AnimationEvent.h b/Source/WebCore/dom/AnimationEvent.h
>index 52bebf428d67af796e34cc30edca6c4fcf71e590..51e2f69593c8c9a7c7851fa77115ca8053eae435 100644
>--- a/Source/WebCore/dom/AnimationEvent.h
>+++ b/Source/WebCore/dom/AnimationEvent.h
>@@ -31,7 +31,7 @@ namespace WebCore {
> 
> class AnimationEvent final : public Event {
> public:
>- static Ref<AnimationEvent> create(const AtomicString& type, const String& animationName, double elapsedTime)
>+ static Ref<AnimationEvent> create(const AtomString& type, const String& animationName, double elapsedTime)
> {
> return adoptRef(*new AnimationEvent(type, animationName, elapsedTime));
> }
>@@ -41,7 +41,7 @@ public:
> double elapsedTime { 0 };
> };
> 
>- static Ref<AnimationEvent> create(const AtomicString& type, const Init& initializer, IsTrusted isTrusted = IsTrusted::No)
>+ static Ref<AnimationEvent> create(const AtomString& type, const Init& initializer, IsTrusted isTrusted = IsTrusted::No)
> {
> return adoptRef(*new AnimationEvent(type, initializer, isTrusted));
> }
>@@ -54,8 +54,8 @@ public:
> EventInterface eventInterface() const override;
> 
> private:
>- AnimationEvent(const AtomicString& type, const String& animationName, double elapsedTime);
>- AnimationEvent(const AtomicString&, const Init&, IsTrusted);
>+ AnimationEvent(const AtomString& type, const String& animationName, double elapsedTime);
>+ AnimationEvent(const AtomString&, const Init&, IsTrusted);
> 
> String m_animationName;
> double m_elapsedTime;
>diff --git a/Source/WebCore/dom/Attr.cpp b/Source/WebCore/dom/Attr.cpp
>index 49fa57dfa5eb906441c38e3974b3264d261a334c..2e9940a38bfeccaab967b179c28b3149d6d465f7 100644
>--- a/Source/WebCore/dom/Attr.cpp
>+++ b/Source/WebCore/dom/Attr.cpp
>@@ -31,7 +31,7 @@
> #include "TextNodeTraversal.h"
> #include "XMLNSNames.h"
> #include <wtf/IsoMallocInlines.h>
>-#include <wtf/text/AtomicString.h>
>+#include <wtf/text/AtomString.h>
> 
> namespace WebCore {
> 
>@@ -46,7 +46,7 @@ Attr::Attr(Element& element, const QualifiedName& name)
> {
> }
> 
>-Attr::Attr(Document& document, const QualifiedName& name, const AtomicString& standaloneValue)
>+Attr::Attr(Document& document, const QualifiedName& name, const AtomString& standaloneValue)
> : Node(document, CreateOther)
> , m_name(name)
> , m_standaloneValue(standaloneValue)
>@@ -58,7 +58,7 @@ Ref<Attr> Attr::create(Element& element, const QualifiedName& name)
> return adoptRef(*new Attr(element, name));
> }
> 
>-Ref<Attr> Attr::create(Document& document, const QualifiedName& name, const AtomicString& value)
>+Ref<Attr> Attr::create(Document& document, const QualifiedName& name, const AtomString& value)
> {
> return adoptRef(*new Attr(document, name, value));
> }
>@@ -69,7 +69,7 @@ Attr::~Attr()
> ASSERT_WITH_SECURITY_IMPLICATION(treeScope().rootNode().isDocumentNode());
> }
> 
>-ExceptionOr<void> Attr::setPrefix(const AtomicString& prefix)
>+ExceptionOr<void> Attr::setPrefix(const AtomString& prefix)
> {
> auto result = checkSetPrefix(prefix);
> if (result.hasException())
>@@ -78,7 +78,7 @@ ExceptionOr<void> Attr::setPrefix(const AtomicString& prefix)
> if ((prefix == xmlnsAtom() && namespaceURI() != XMLNSNames::xmlnsNamespaceURI) || qualifiedName() == xmlnsAtom())
> return Exception { NamespaceError };
> 
>- const AtomicString& newPrefix = prefix.isEmpty() ? nullAtom() : prefix;
>+ const AtomString& newPrefix = prefix.isEmpty() ? nullAtom() : prefix;
> if (m_element)
> elementAttribute().setPrefix(newPrefix);
> m_name.setPrefix(newPrefix);
>@@ -86,7 +86,7 @@ ExceptionOr<void> Attr::setPrefix(const AtomicString& prefix)
> return { };
> }
> 
>-void Attr::setValue(const AtomicString& value)
>+void Attr::setValue(const AtomString& value)
> {
> if (m_element)
> m_element->setAttribute(qualifiedName(), value);
>@@ -116,7 +116,7 @@ CSSStyleDeclaration* Attr::style()
> return &m_style->ensureCSSStyleDeclaration();
> }
> 
>-const AtomicString& Attr::value() const
>+const AtomString& Attr::value() const
> {
> if (m_element)
> return m_element->getAttribute(qualifiedName());
>@@ -130,7 +130,7 @@ Attribute& Attr::elementAttribute()
> return *m_element->ensureUniqueElementData().findAttributeByName(qualifiedName());
> }
> 
>-void Attr::detachFromElementWithValue(const AtomicString& value)
>+void Attr::detachFromElementWithValue(const AtomString& value)
> {
> ASSERT(m_element);
> ASSERT(m_standaloneValue.isNull());
>diff --git a/Source/WebCore/dom/Attr.h b/Source/WebCore/dom/Attr.h
>index 7ee0a0bd08d758971f3c02a50bf41d96b105715b..ac94c809e9363cb4c6776e354606210abc4527ac 100644
>--- a/Source/WebCore/dom/Attr.h
>+++ b/Source/WebCore/dom/Attr.h
>@@ -37,30 +37,30 @@ class Attr final : public Node {
> WTF_MAKE_ISO_ALLOCATED(Attr);
> public:
> static Ref<Attr> create(Element&, const QualifiedName&);
>- static Ref<Attr> create(Document&, const QualifiedName&, const AtomicString& value);
>+ static Ref<Attr> create(Document&, const QualifiedName&, const AtomString& value);
> virtual ~Attr();
> 
> String name() const { return qualifiedName().toString(); }
> bool specified() const { return true; }
> Element* ownerElement() const { return m_element; }
> 
>- WEBCORE_EXPORT const AtomicString& value() const;
>- WEBCORE_EXPORT void setValue(const AtomicString&);
>+ WEBCORE_EXPORT const AtomString& value() const;
>+ WEBCORE_EXPORT void setValue(const AtomString&);
> 
> const QualifiedName& qualifiedName() const { return m_name; }
> 
> WEBCORE_EXPORT CSSStyleDeclaration* style();
> 
> void attachToElement(Element&);
>- void detachFromElementWithValue(const AtomicString&);
>+ void detachFromElementWithValue(const AtomString&);
> 
>- const AtomicString& namespaceURI() const final { return m_name.namespaceURI(); }
>- const AtomicString& localName() const final { return m_name.localName(); }
>- const AtomicString& prefix() const final { return m_name.prefix(); }
>+ const AtomString& namespaceURI() const final { return m_name.namespaceURI(); }
>+ const AtomString& localName() const final { return m_name.localName(); }
>+ const AtomString& prefix() const final { return m_name.prefix(); }
> 
> private:
> Attr(Element&, const QualifiedName&);
>- Attr(Document&, const QualifiedName&, const AtomicString& value);
>+ Attr(Document&, const QualifiedName&, const AtomString& value);
> 
> String nodeName() const final { return name(); }
> NodeType nodeType() const final { return ATTRIBUTE_NODE; }
>@@ -68,7 +68,7 @@ private:
> String nodeValue() const final { return value(); }
> ExceptionOr<void> setNodeValue(const String&) final;
> 
>- ExceptionOr<void> setPrefix(const AtomicString&) final;
>+ ExceptionOr<void> setPrefix(const AtomString&) final;
> 
> Ref<Node> cloneNodeInternal(Document&, CloningOperation) final;
> 
>@@ -80,7 +80,7 @@ private:
> // Note that m_name is always set, but m_element/m_standaloneValue may be null.
> Element* m_element { nullptr };
> QualifiedName m_name;
>- AtomicString m_standaloneValue;
>+ AtomString m_standaloneValue;
> 
> RefPtr<MutableStyleProperties> m_style;
> };
>diff --git a/Source/WebCore/dom/Attribute.h b/Source/WebCore/dom/Attribute.h
>index 456c286f2a1bcbb0ec2d878dcb198afe6cabdc80..0d625e94ec47bf2ca08f5d9cb5c7b042fd64525a 100644
>--- a/Source/WebCore/dom/Attribute.h
>+++ b/Source/WebCore/dom/Attribute.h
>@@ -33,7 +33,7 @@ namespace WebCore {
> // The actual Attr with its value as a Text child is allocated only if needed.
> class Attribute {
> public:
>- Attribute(const QualifiedName& name, const AtomicString& value)
>+ Attribute(const QualifiedName& name, const AtomString& value)
> : m_name(name)
> , m_value(value)
> {
>@@ -42,21 +42,21 @@ public:
> // NOTE: The references returned by these functions are only valid for as long
> // as the Attribute stays in place. For example, calling a function that mutates
> // an Element's internal attribute storage may invalidate them.
>- const AtomicString& value() const { return m_value; }
>+ const AtomString& value() const { return m_value; }
> static ptrdiff_t valueMemoryOffset() { return OBJECT_OFFSETOF(Attribute, m_value); }
>- const AtomicString& prefix() const { return m_name.prefix(); }
>- const AtomicString& localName() const { return m_name.localName(); }
>- const AtomicString& namespaceURI() const { return m_name.namespaceURI(); }
>+ const AtomString& prefix() const { return m_name.prefix(); }
>+ const AtomString& localName() const { return m_name.localName(); }
>+ const AtomString& namespaceURI() const { return m_name.namespaceURI(); }
> 
> const QualifiedName& name() const { return m_name; }
> static ptrdiff_t nameMemoryOffset() { return OBJECT_OFFSETOF(Attribute, m_name); }
> 
> bool isEmpty() const { return m_value.isEmpty(); }
>- static bool nameMatchesFilter(const QualifiedName&, const AtomicString& filterPrefix, const AtomicString& filterLocalName, const AtomicString& filterNamespaceURI);
>- bool matches(const AtomicString& prefix, const AtomicString& localName, const AtomicString& namespaceURI) const;
>+ static bool nameMatchesFilter(const QualifiedName&, const AtomString& filterPrefix, const AtomString& filterLocalName, const AtomString& filterNamespaceURI);
>+ bool matches(const AtomString& prefix, const AtomString& localName, const AtomString& namespaceURI) const;
> 
>- void setValue(const AtomicString& value) { m_value = value; }
>- void setPrefix(const AtomicString& prefix) { m_name.setPrefix(prefix); }
>+ void setValue(const AtomString& value) { m_value = value; }
>+ void setPrefix(const AtomString& prefix) { m_name.setPrefix(prefix); }
> 
> // Note: This API is only for HTMLTreeBuilder. It is not safe to change the
> // name of an attribute once parseAttribute has been called as DOM
>@@ -71,17 +71,17 @@ public:
> 
> private:
> QualifiedName m_name;
>- AtomicString m_value;
>+ AtomString m_value;
> };
> 
>-inline bool Attribute::nameMatchesFilter(const QualifiedName& name, const AtomicString& filterPrefix, const AtomicString& filterLocalName, const AtomicString& filterNamespaceURI)
>+inline bool Attribute::nameMatchesFilter(const QualifiedName& name, const AtomString& filterPrefix, const AtomString& filterLocalName, const AtomString& filterNamespaceURI)
> {
> if (filterLocalName != name.localName())
> return false;
> return filterPrefix == starAtom() || filterNamespaceURI == name.namespaceURI();
> }
> 
>-inline bool Attribute::matches(const AtomicString& prefix, const AtomicString& localName, const AtomicString& namespaceURI) const
>+inline bool Attribute::matches(const AtomString& prefix, const AtomString& localName, const AtomString& namespaceURI) const
> {
> return nameMatchesFilter(m_name, prefix, localName, namespaceURI);
> }
>diff --git a/Source/WebCore/dom/BeforeLoadEvent.h b/Source/WebCore/dom/BeforeLoadEvent.h
>index f6356924959abe8b17eeb332c5d3388f86ea941d..107ad2249cf719d853ba4381df10b9f624682a36 100644
>--- a/Source/WebCore/dom/BeforeLoadEvent.h
>+++ b/Source/WebCore/dom/BeforeLoadEvent.h
>@@ -42,7 +42,7 @@ public:
> String url;
> };
> 
>- static Ref<BeforeLoadEvent> create(const AtomicString& type, const Init& initializer, IsTrusted isTrusted = IsTrusted::No)
>+ static Ref<BeforeLoadEvent> create(const AtomString& type, const Init& initializer, IsTrusted isTrusted = IsTrusted::No)
> {
> return adoptRef(*new BeforeLoadEvent(type, initializer, isTrusted));
> }
>@@ -58,7 +58,7 @@ private:
> {
> }
> 
>- BeforeLoadEvent(const AtomicString& type, const Init& initializer, IsTrusted isTrusted)
>+ BeforeLoadEvent(const AtomString& type, const Init& initializer, IsTrusted isTrusted)
> : Event(type, initializer, isTrusted)
> , m_url(initializer.url)
> {
>diff --git a/Source/WebCore/dom/ClassCollection.cpp b/Source/WebCore/dom/ClassCollection.cpp
>index 3817ecd7bb0ff676c3c4798d6cc22a0f979485d1..1998305c4d6f2a159183898cb5527c468cf0ecdb 100644
>--- a/Source/WebCore/dom/ClassCollection.cpp
>+++ b/Source/WebCore/dom/ClassCollection.cpp
>@@ -38,7 +38,7 @@ namespace WebCore {
> 
> WTF_MAKE_ISO_ALLOCATED_IMPL(ClassCollection);
> 
>-Ref<ClassCollection> ClassCollection::create(ContainerNode& rootNode, CollectionType type, const AtomicString& classNames)
>+Ref<ClassCollection> ClassCollection::create(ContainerNode& rootNode, CollectionType type, const AtomString& classNames)
> {
> ASSERT(type == ByClass);
> return adoptRef(*new ClassCollection(rootNode, type, classNames));
>diff --git a/Source/WebCore/dom/ClassCollection.h b/Source/WebCore/dom/ClassCollection.h
>index 3d8803f5c34427190e83bab1b591021abea48fdc..ecf7f3d20c615c4689820f19aa9cf3a8632f6bdd 100644
>--- a/Source/WebCore/dom/ClassCollection.h
>+++ b/Source/WebCore/dom/ClassCollection.h
>@@ -38,20 +38,20 @@ namespace WebCore {
> class ClassCollection final : public CachedHTMLCollection<ClassCollection, CollectionTypeTraits<ByClass>::traversalType> {
> WTF_MAKE_ISO_ALLOCATED(ClassCollection);
> public:
>- static Ref<ClassCollection> create(ContainerNode&, CollectionType, const AtomicString& classNames);
>+ static Ref<ClassCollection> create(ContainerNode&, CollectionType, const AtomString& classNames);
> 
> virtual ~ClassCollection();
> 
> bool elementMatches(Element&) const;
> 
> private:
>- ClassCollection(ContainerNode& rootNode, CollectionType, const AtomicString& classNames);
>+ ClassCollection(ContainerNode& rootNode, CollectionType, const AtomString& classNames);
> 
> SpaceSplitString m_classNames;
>- AtomicString m_originalClassNames;
>+ AtomString m_originalClassNames;
> };
> 
>-inline ClassCollection::ClassCollection(ContainerNode& rootNode, CollectionType type, const AtomicString& classNames)
>+inline ClassCollection::ClassCollection(ContainerNode& rootNode, CollectionType type, const AtomString& classNames)
> : CachedHTMLCollection<ClassCollection, CollectionTypeTraits<ByClass>::traversalType>(rootNode, type)
> , m_classNames(classNames, rootNode.document().inQuirksMode())
> , m_originalClassNames(classNames)
>diff --git a/Source/WebCore/dom/ClipboardEvent.cpp b/Source/WebCore/dom/ClipboardEvent.cpp
>index 3caadcf24c5fe5569c70378faf5e72ff0f4d1e50..e3ff51adf4fadecf3b3602f8cfa4683ed39b0a6c 100644
>--- a/Source/WebCore/dom/ClipboardEvent.cpp
>+++ b/Source/WebCore/dom/ClipboardEvent.cpp
>@@ -27,13 +27,13 @@
> 
> namespace WebCore {
> 
>-ClipboardEvent::ClipboardEvent(const AtomicString& type, Ref<DataTransfer>&& dataTransfer)
>+ClipboardEvent::ClipboardEvent(const AtomString& type, Ref<DataTransfer>&& dataTransfer)
> : Event(type, CanBubble::Yes, IsCancelable::Yes, IsComposed::Yes)
> , m_clipboardData(WTFMove(dataTransfer))
> {
> }
> 
>-ClipboardEvent::ClipboardEvent(const AtomicString& type, const Init& init)
>+ClipboardEvent::ClipboardEvent(const AtomString& type, const Init& init)
> : Event(type, init, IsTrusted::No)
> , m_clipboardData(init.clipboardData)
> {
>diff --git a/Source/WebCore/dom/ClipboardEvent.h b/Source/WebCore/dom/ClipboardEvent.h
>index 7906be0d3801a7cb71460dfa988e1e705836ce10..0d4e4cb1611037e671c592182d99f43a41004f9d 100644
>--- a/Source/WebCore/dom/ClipboardEvent.h
>+++ b/Source/WebCore/dom/ClipboardEvent.h
>@@ -37,12 +37,12 @@ public:
> RefPtr<DataTransfer> clipboardData;
> };
> 
>- static Ref<ClipboardEvent> create(const AtomicString& type, Ref<DataTransfer>&& dataTransfer)
>+ static Ref<ClipboardEvent> create(const AtomString& type, Ref<DataTransfer>&& dataTransfer)
> {
> return adoptRef(*new ClipboardEvent(type, WTFMove(dataTransfer)));
> }
> 
>- static Ref<ClipboardEvent> create(const AtomicString& type, const Init& init)
>+ static Ref<ClipboardEvent> create(const AtomString& type, const Init& init)
> {
> return adoptRef(*new ClipboardEvent(type, init));
> }
>@@ -50,8 +50,8 @@ public:
> DataTransfer* clipboardData() const { return m_clipboardData.get(); }
> 
> private:
>- ClipboardEvent(const AtomicString& type, Ref<DataTransfer>&&);
>- ClipboardEvent(const AtomicString& type, const Init&);
>+ ClipboardEvent(const AtomString& type, Ref<DataTransfer>&&);
>+ ClipboardEvent(const AtomString& type, const Init&);
> 
> EventInterface eventInterface() const final;
> bool isClipboardEvent() const final;
>diff --git a/Source/WebCore/dom/CompositionEvent.cpp b/Source/WebCore/dom/CompositionEvent.cpp
>index 1d04795de82787052b6c961b79ee0f8e161ffb8a..ec09c384519c068e62631283bde34d07b57d6aa8 100644
>--- a/Source/WebCore/dom/CompositionEvent.cpp
>+++ b/Source/WebCore/dom/CompositionEvent.cpp
>@@ -31,13 +31,13 @@ namespace WebCore {
> 
> CompositionEvent::CompositionEvent() = default;
> 
>-CompositionEvent::CompositionEvent(const AtomicString& type, RefPtr<WindowProxy>&& view, const String& data)
>+CompositionEvent::CompositionEvent(const AtomString& type, RefPtr<WindowProxy>&& view, const String& data)
> : UIEvent(type, CanBubble::Yes, IsCancelable::Yes, IsComposed::Yes, WTFMove(view), 0)
> , m_data(data)
> {
> }
> 
>-CompositionEvent::CompositionEvent(const AtomicString& type, const Init& initializer)
>+CompositionEvent::CompositionEvent(const AtomString& type, const Init& initializer)
> : UIEvent(type, initializer)
> , m_data(initializer.data)
> {
>@@ -45,7 +45,7 @@ CompositionEvent::CompositionEvent(const AtomicString& type, const Init& initial
> 
> CompositionEvent::~CompositionEvent() = default;
> 
>-void CompositionEvent::initCompositionEvent(const AtomicString& type, bool canBubble, bool cancelable, RefPtr<WindowProxy>&& view, const String& data)
>+void CompositionEvent::initCompositionEvent(const AtomString& type, bool canBubble, bool cancelable, RefPtr<WindowProxy>&& view, const String& data)
> {
> if (isBeingDispatched())
> return;
>diff --git a/Source/WebCore/dom/CompositionEvent.h b/Source/WebCore/dom/CompositionEvent.h
>index 223b8605949ca2e52c4f3c62295f38567aa6d223..210905a014188523a5db536a043241a5db6cdb40 100644
>--- a/Source/WebCore/dom/CompositionEvent.h
>+++ b/Source/WebCore/dom/CompositionEvent.h
>@@ -32,7 +32,7 @@ namespace WebCore {
> 
> class CompositionEvent final : public UIEvent {
> public:
>- static Ref<CompositionEvent> create(const AtomicString& type, RefPtr<WindowProxy>&& view, const String& data)
>+ static Ref<CompositionEvent> create(const AtomString& type, RefPtr<WindowProxy>&& view, const String& data)
> {
> return adoptRef(*new CompositionEvent(type, WTFMove(view), data));
> }
>@@ -46,14 +46,14 @@ public:
> String data;
> };
> 
>- static Ref<CompositionEvent> create(const AtomicString& type, const Init& initializer)
>+ static Ref<CompositionEvent> create(const AtomString& type, const Init& initializer)
> {
> return adoptRef(*new CompositionEvent(type, initializer));
> }
> 
> virtual ~CompositionEvent();
> 
>- void initCompositionEvent(const AtomicString& type, bool canBubble, bool cancelable, RefPtr<WindowProxy>&&, const String& data);
>+ void initCompositionEvent(const AtomString& type, bool canBubble, bool cancelable, RefPtr<WindowProxy>&&, const String& data);
> 
> String data() const { return m_data; }
> 
>@@ -61,8 +61,8 @@ public:
> 
> private:
> CompositionEvent();
>- CompositionEvent(const AtomicString& type, RefPtr<WindowProxy>&&, const String&);
>- CompositionEvent(const AtomicString& type, const Init&);
>+ CompositionEvent(const AtomString& type, RefPtr<WindowProxy>&&, const String&);
>+ CompositionEvent(const AtomString& type, const Init&);
> 
> bool isCompositionEvent() const override;
> 
>diff --git a/Source/WebCore/dom/ConstantPropertyMap.cpp b/Source/WebCore/dom/ConstantPropertyMap.cpp
>index 6c108c888715f67fa9818600abdb15104faac2f0..fd142f7deab0748e96a19c5b0daed906270d30b2 100644
>--- a/Source/WebCore/dom/ConstantPropertyMap.cpp
>+++ b/Source/WebCore/dom/ConstantPropertyMap.cpp
>@@ -48,17 +48,17 @@ const ConstantPropertyMap::Values& ConstantPropertyMap::values() const
> return *m_values;
> }
> 
>-const AtomicString& ConstantPropertyMap::nameForProperty(ConstantProperty property) const
>+const AtomString& ConstantPropertyMap::nameForProperty(ConstantProperty property) const
> {
>- static NeverDestroyed<AtomicString> safeAreaInsetTopName("safe-area-inset-top", AtomicString::ConstructFromLiteral);
>- static NeverDestroyed<AtomicString> safeAreaInsetRightName("safe-area-inset-right", AtomicString::ConstructFromLiteral);
>- static NeverDestroyed<AtomicString> safeAreaInsetBottomName("safe-area-inset-bottom", AtomicString::ConstructFromLiteral);
>- static NeverDestroyed<AtomicString> safeAreaInsetLeftName("safe-area-inset-left", AtomicString::ConstructFromLiteral);
>- static NeverDestroyed<AtomicString> fullscreenInsetTopName("fullscreen-inset-top", AtomicString::ConstructFromLiteral);
>- static NeverDestroyed<AtomicString> fullscreenInsetLeftName("fullscreen-inset-left", AtomicString::ConstructFromLiteral);
>- static NeverDestroyed<AtomicString> fullscreenInsetBottomName("fullscreen-inset-bottom", AtomicString::ConstructFromLiteral);
>- static NeverDestroyed<AtomicString> fullscreenInsetRightName("fullscreen-inset-right", AtomicString::ConstructFromLiteral);
>- static NeverDestroyed<AtomicString> fullscreenAutoHideDurationName("fullscreen-auto-hide-duration", AtomicString::ConstructFromLiteral);
>+ static NeverDestroyed<AtomString> safeAreaInsetTopName("safe-area-inset-top", AtomString::ConstructFromLiteral);
>+ static NeverDestroyed<AtomString> safeAreaInsetRightName("safe-area-inset-right", AtomString::ConstructFromLiteral);
>+ static NeverDestroyed<AtomString> safeAreaInsetBottomName("safe-area-inset-bottom", AtomString::ConstructFromLiteral);
>+ static NeverDestroyed<AtomString> safeAreaInsetLeftName("safe-area-inset-left", AtomString::ConstructFromLiteral);
>+ static NeverDestroyed<AtomString> fullscreenInsetTopName("fullscreen-inset-top", AtomString::ConstructFromLiteral);
>+ static NeverDestroyed<AtomString> fullscreenInsetLeftName("fullscreen-inset-left", AtomString::ConstructFromLiteral);
>+ static NeverDestroyed<AtomString> fullscreenInsetBottomName("fullscreen-inset-bottom", AtomString::ConstructFromLiteral);
>+ static NeverDestroyed<AtomString> fullscreenInsetRightName("fullscreen-inset-right", AtomString::ConstructFromLiteral);
>+ static NeverDestroyed<AtomString> fullscreenAutoHideDurationName("fullscreen-auto-hide-duration", AtomString::ConstructFromLiteral);
> 
> switch (property) {
> case ConstantProperty::SafeAreaInsetTop:
>diff --git a/Source/WebCore/dom/ConstantPropertyMap.h b/Source/WebCore/dom/ConstantPropertyMap.h
>index d26fb988b018cde63b44f2a1a757177919ab4697..7faed98a0b1eb12a9ea0aaf6f0099736d8bc838b 100644
>--- a/Source/WebCore/dom/ConstantPropertyMap.h
>+++ b/Source/WebCore/dom/ConstantPropertyMap.h
>@@ -29,8 +29,8 @@
> #include <wtf/HashMap.h>
> #include <wtf/Ref.h>
> #include <wtf/Seconds.h>
>-#include <wtf/text/AtomicString.h>
>-#include <wtf/text/AtomicStringHash.h>
>+#include <wtf/text/AtomString.h>
>+#include <wtf/text/AtomStringHash.h>
> 
> namespace WebCore {
> 
>@@ -55,7 +55,7 @@ class ConstantPropertyMap {
> public:
> explicit ConstantPropertyMap(Document&);
> 
>- typedef HashMap<AtomicString, Ref<CSSCustomPropertyValue>> Values;
>+ typedef HashMap<AtomString, Ref<CSSCustomPropertyValue>> Values;
> const Values& values() const;
> 
> void didChangeSafeAreaInsets();
>@@ -65,7 +65,7 @@ public:
> private:
> void buildValues();
> 
>- const AtomicString& nameForProperty(ConstantProperty) const;
>+ const AtomString& nameForProperty(ConstantProperty) const;
> void setValueForProperty(ConstantProperty, Ref<CSSVariableData>&&);
> 
> void updateConstantsForSafeAreaInsets();
>diff --git a/Source/WebCore/dom/ContainerNode.cpp b/Source/WebCore/dom/ContainerNode.cpp
>index b85af131b5ac409878723bc4ef2a86450ed38b65..030fc644027636ff2a6a0dbf9cbddc3fa24f6fbc 100644
>--- a/Source/WebCore/dom/ContainerNode.cpp
>+++ b/Source/WebCore/dom/ContainerNode.cpp
>@@ -875,7 +875,7 @@ ExceptionOr<Ref<NodeList>> ContainerNode::querySelectorAll(const String& selecto
> return query.releaseReturnValue().queryAll(*this);
> }
> 
>-Ref<HTMLCollection> ContainerNode::getElementsByTagName(const AtomicString& qualifiedName)
>+Ref<HTMLCollection> ContainerNode::getElementsByTagName(const AtomString& qualifiedName)
> {
> ASSERT(!qualifiedName.isNull());
> 
>@@ -887,7 +887,7 @@ Ref<HTMLCollection> ContainerNode::getElementsByTagName(const AtomicString& qual
> return ensureRareData().ensureNodeLists().addCachedCollection<TagCollection>(*this, ByTag, qualifiedName);
> }
> 
>-Ref<HTMLCollection> ContainerNode::getElementsByTagNameNS(const AtomicString& namespaceURI, const AtomicString& localName)
>+Ref<HTMLCollection> ContainerNode::getElementsByTagNameNS(const AtomString& namespaceURI, const AtomString& localName)
> {
> ASSERT(!localName.isNull());
> return ensureRareData().ensureNodeLists().addCachedTagCollectionNS(*this, namespaceURI.isEmpty() ? nullAtom() : namespaceURI, localName);
>@@ -898,12 +898,12 @@ Ref<NodeList> ContainerNode::getElementsByName(const String& elementName)
> return ensureRareData().ensureNodeLists().addCacheWithAtomicName<NameNodeList>(*this, elementName);
> }
> 
>-Ref<HTMLCollection> ContainerNode::getElementsByClassName(const AtomicString& classNames)
>+Ref<HTMLCollection> ContainerNode::getElementsByClassName(const AtomString& classNames)
> {
> return ensureRareData().ensureNodeLists().addCachedCollection<ClassCollection>(*this, ByClass, classNames);
> }
> 
>-Ref<RadioNodeList> ContainerNode::radioNodeList(const AtomicString& name)
>+Ref<RadioNodeList> ContainerNode::radioNodeList(const AtomString& name)
> {
> ASSERT(hasTagName(HTMLNames::formTag) || hasTagName(HTMLNames::fieldsetTag));
> return ensureRareData().ensureNodeLists().addCacheWithAtomicName<RadioNodeList>(*this, name);
>diff --git a/Source/WebCore/dom/ContainerNode.h b/Source/WebCore/dom/ContainerNode.h
>index 3f0571e335e7796eefe5448a207a2f02a888ad4a..2b29060fe5492053dcbaae9a96c5543fa9daf5b1 100644
>--- a/Source/WebCore/dom/ContainerNode.h
>+++ b/Source/WebCore/dom/ContainerNode.h
>@@ -114,11 +114,11 @@ public:
> WEBCORE_EXPORT ExceptionOr<Element*> querySelector(const String& selectors);
> WEBCORE_EXPORT ExceptionOr<Ref<NodeList>> querySelectorAll(const String& selectors);
> 
>- WEBCORE_EXPORT Ref<HTMLCollection> getElementsByTagName(const AtomicString&);
>- WEBCORE_EXPORT Ref<HTMLCollection> getElementsByTagNameNS(const AtomicString& namespaceURI, const AtomicString& localName);
>+ WEBCORE_EXPORT Ref<HTMLCollection> getElementsByTagName(const AtomString&);
>+ WEBCORE_EXPORT Ref<HTMLCollection> getElementsByTagNameNS(const AtomString& namespaceURI, const AtomString& localName);
> WEBCORE_EXPORT Ref<NodeList> getElementsByName(const String& elementName);
>- WEBCORE_EXPORT Ref<HTMLCollection> getElementsByClassName(const AtomicString& classNames);
>- Ref<RadioNodeList> radioNodeList(const AtomicString&);
>+ WEBCORE_EXPORT Ref<HTMLCollection> getElementsByClassName(const AtomString& classNames);
>+ Ref<RadioNodeList> radioNodeList(const AtomString&);
> 
> // From the ParentNode interface - https://dom.spec.whatwg.org/#interface-parentnode
> WEBCORE_EXPORT Ref<HTMLCollection> children();
>diff --git a/Source/WebCore/dom/CustomElementReactionQueue.cpp b/Source/WebCore/dom/CustomElementReactionQueue.cpp
>index bd49e873474d513019d2247a8a61ce34fe343104..9eb5d7e49f56a1e98d1fbb9b23e6ea72e226158f 100644
>--- a/Source/WebCore/dom/CustomElementReactionQueue.cpp
>+++ b/Source/WebCore/dom/CustomElementReactionQueue.cpp
>@@ -63,7 +63,7 @@ public:
> , m_newDocument(&newDocument)
> { }
> 
>- CustomElementReactionQueueItem(const QualifiedName& attributeName, const AtomicString& oldValue, const AtomicString& newValue)
>+ CustomElementReactionQueueItem(const QualifiedName& attributeName, const AtomString& oldValue, const AtomString& newValue)
> : m_type(Type::AttributeChanged)
> , m_attributeName(attributeName)
> , m_oldValue(oldValue)
>@@ -99,8 +99,8 @@ private:
> RefPtr<Document> m_oldDocument;
> RefPtr<Document> m_newDocument;
> Optional<QualifiedName> m_attributeName;
>- AtomicString m_oldValue;
>- AtomicString m_newValue;
>+ AtomString m_oldValue;
>+ AtomString m_newValue;
> };
> 
> CustomElementReactionQueue::CustomElementReactionQueue(JSCustomElementInterface& elementInterface)
>@@ -190,7 +190,7 @@ void CustomElementReactionQueue::enqueueAdoptedCallbackIfNeeded(Element& element
> enqueueElementOnAppropriateElementQueue(element);
> }
> 
>-void CustomElementReactionQueue::enqueueAttributeChangedCallbackIfNeeded(Element& element, const QualifiedName& attributeName, const AtomicString& oldValue, const AtomicString& newValue)
>+void CustomElementReactionQueue::enqueueAttributeChangedCallbackIfNeeded(Element& element, const QualifiedName& attributeName, const AtomString& oldValue, const AtomString& newValue)
> {
> ASSERT(CustomElementReactionDisallowedScope::isReactionAllowed());
> ASSERT(element.isDefinedCustomElement());
>diff --git a/Source/WebCore/dom/CustomElementReactionQueue.h b/Source/WebCore/dom/CustomElementReactionQueue.h
>index c82c60704db459ccb7713eb8aaa80a4e9ad4387a..589c841cc3e88ce79e742e7b2bb34ae9e69f08ab 100644
>--- a/Source/WebCore/dom/CustomElementReactionQueue.h
>+++ b/Source/WebCore/dom/CustomElementReactionQueue.h
>@@ -56,7 +56,7 @@ public:
> static void enqueueConnectedCallbackIfNeeded(Element&);
> static void enqueueDisconnectedCallbackIfNeeded(Element&);
> static void enqueueAdoptedCallbackIfNeeded(Element&, Document& oldDocument, Document& newDocument);
>- static void enqueueAttributeChangedCallbackIfNeeded(Element&, const QualifiedName&, const AtomicString& oldValue, const AtomicString& newValue);
>+ static void enqueueAttributeChangedCallbackIfNeeded(Element&, const QualifiedName&, const AtomString& oldValue, const AtomString& newValue);
> static void enqueuePostUpgradeReactions(Element&);
> 
> bool observesStyleAttribute() const;
>diff --git a/Source/WebCore/dom/CustomElementRegistry.cpp b/Source/WebCore/dom/CustomElementRegistry.cpp
>index 661721d0a5945a14d291f713688f3f061c9b55d4..769b16bb4fbe5e79503f6450e8f2711aef572b56 100644
>--- a/Source/WebCore/dom/CustomElementRegistry.cpp
>+++ b/Source/WebCore/dom/CustomElementRegistry.cpp
>@@ -37,7 +37,7 @@
> #include "ShadowRoot.h"
> #include "TypedElementDescendantIterator.h"
> #include <JavaScriptCore/JSCJSValueInlines.h>
>-#include <wtf/text/AtomicString.h>
>+#include <wtf/text/AtomString.h>
> 
> namespace WebCore {
> 
>@@ -69,7 +69,7 @@ static void enqueueUpgradeInShadowIncludingTreeOrder(ContainerNode& node, JSCust
> 
> void CustomElementRegistry::addElementDefinition(Ref<JSCustomElementInterface>&& elementInterface)
> {
>- AtomicString localName = elementInterface->name().localName();
>+ AtomString localName = elementInterface->name().localName();
> ASSERT(!m_nameMap.contains(localName));
> m_constructorMap.add(elementInterface->constructor(), elementInterface.ptr());
> m_nameMap.add(localName, elementInterface.copyRef());
>@@ -93,7 +93,7 @@ JSCustomElementInterface* CustomElementRegistry::findInterface(const QualifiedNa
> return m_nameMap.get(name.localName());
> }
> 
>-JSCustomElementInterface* CustomElementRegistry::findInterface(const AtomicString& name) const
>+JSCustomElementInterface* CustomElementRegistry::findInterface(const AtomString& name) const
> {
> return m_nameMap.get(name);
> }
>@@ -108,7 +108,7 @@ bool CustomElementRegistry::containsConstructor(const JSC::JSObject* constructor
> return m_constructorMap.contains(constructor);
> }
> 
>-JSC::JSValue CustomElementRegistry::get(const AtomicString& name)
>+JSC::JSValue CustomElementRegistry::get(const AtomString& name)
> {
> if (auto* elementInterface = m_nameMap.get(name))
> return elementInterface->constructor();
>diff --git a/Source/WebCore/dom/CustomElementRegistry.h b/Source/WebCore/dom/CustomElementRegistry.h
>index b42abbd1ecc8dc9b2952640c04a40cf8c1c0cf7d..dec78244170af7deab3ad69bdf28ed90e5ed6563 100644
>--- a/Source/WebCore/dom/CustomElementRegistry.h
>+++ b/Source/WebCore/dom/CustomElementRegistry.h
>@@ -28,8 +28,8 @@
> #include "ContextDestructionObserver.h"
> #include "QualifiedName.h"
> #include <wtf/HashMap.h>
>-#include <wtf/text/AtomicString.h>
>-#include <wtf/text/AtomicStringHash.h>
>+#include <wtf/text/AtomString.h>
>+#include <wtf/text/AtomStringHash.h>
> 
> namespace JSC {
> 
>@@ -59,22 +59,22 @@ public:
> 
> JSCustomElementInterface* findInterface(const Element&) const;
> JSCustomElementInterface* findInterface(const QualifiedName&) const;
>- JSCustomElementInterface* findInterface(const AtomicString&) const;
>+ JSCustomElementInterface* findInterface(const AtomString&) const;
> JSCustomElementInterface* findInterface(const JSC::JSObject*) const;
> bool containsConstructor(const JSC::JSObject*) const;
> 
>- JSC::JSValue get(const AtomicString&);
>+ JSC::JSValue get(const AtomString&);
> void upgrade(Node& root);
> 
>- HashMap<AtomicString, Ref<DeferredPromise>>& promiseMap() { return m_promiseMap; }
>+ HashMap<AtomString, Ref<DeferredPromise>>& promiseMap() { return m_promiseMap; }
> 
> private:
> CustomElementRegistry(DOMWindow&, ScriptExecutionContext*);
> 
> DOMWindow& m_window;
>- HashMap<AtomicString, Ref<JSCustomElementInterface>> m_nameMap;
>+ HashMap<AtomString, Ref<JSCustomElementInterface>> m_nameMap;
> HashMap<const JSC::JSObject*, JSCustomElementInterface*> m_constructorMap;
>- HashMap<AtomicString, Ref<DeferredPromise>> m_promiseMap;
>+ HashMap<AtomString, Ref<DeferredPromise>> m_promiseMap;
> 
> bool m_elementDefinitionIsRunning { false };
> 
>diff --git a/Source/WebCore/dom/CustomEvent.cpp b/Source/WebCore/dom/CustomEvent.cpp
>index 6e650b3228698c9576288f66ddaff9f9ce4902cd..66d72ff03db2a74c05ffa70ae8e8c5475dbbb29c 100644
>--- a/Source/WebCore/dom/CustomEvent.cpp
>+++ b/Source/WebCore/dom/CustomEvent.cpp
>@@ -36,7 +36,7 @@ inline CustomEvent::CustomEvent(IsTrusted isTrusted)
> {
> }
> 
>-inline CustomEvent::CustomEvent(const AtomicString& type, const Init& initializer, IsTrusted isTrusted)
>+inline CustomEvent::CustomEvent(const AtomString& type, const Init& initializer, IsTrusted isTrusted)
> : Event(type, initializer, isTrusted)
> , m_detail(initializer.detail)
> {
>@@ -49,12 +49,12 @@ Ref<CustomEvent> CustomEvent::create(IsTrusted isTrusted)
> return adoptRef(*new CustomEvent(isTrusted));
> }
> 
>-Ref<CustomEvent> CustomEvent::create(const AtomicString& type, const Init& initializer, IsTrusted isTrusted)
>+Ref<CustomEvent> CustomEvent::create(const AtomString& type, const Init& initializer, IsTrusted isTrusted)
> {
> return adoptRef(*new CustomEvent(type, initializer, isTrusted));
> }
> 
>-void CustomEvent::initCustomEvent(const AtomicString& type, bool canBubble, bool cancelable, JSC::JSValue detail)
>+void CustomEvent::initCustomEvent(const AtomString& type, bool canBubble, bool cancelable, JSC::JSValue detail)
> {
> if (isBeingDispatched())
> return;
>diff --git a/Source/WebCore/dom/CustomEvent.h b/Source/WebCore/dom/CustomEvent.h
>index 973abbbaa70a0d872031ac4cb8ba899277b003db..e78d50e677e777fe15ca5398426874139d7a61af 100644
>--- a/Source/WebCore/dom/CustomEvent.h
>+++ b/Source/WebCore/dom/CustomEvent.h
>@@ -42,16 +42,16 @@ public:
> JSC::JSValue detail;
> };
> 
>- static Ref<CustomEvent> create(const AtomicString& type, const Init&, IsTrusted = IsTrusted::No);
>+ static Ref<CustomEvent> create(const AtomString& type, const Init&, IsTrusted = IsTrusted::No);
> 
>- void initCustomEvent(const AtomicString& type, bool canBubble, bool cancelable, JSC::JSValue detail = JSC::JSValue::JSUndefined);
>+ void initCustomEvent(const AtomString& type, bool canBubble, bool cancelable, JSC::JSValue detail = JSC::JSValue::JSUndefined);
> 
> const JSValueInWrappedObject& detail() const { return m_detail; }
> JSValueInWrappedObject& cachedDetail() { return m_cachedDetail; }
> 
> private:
> CustomEvent(IsTrusted);
>- CustomEvent(const AtomicString& type, const Init& initializer, IsTrusted);
>+ CustomEvent(const AtomString& type, const Init& initializer, IsTrusted);
> 
> EventInterface eventInterface() const final;
> 
>diff --git a/Source/WebCore/dom/DataTransferItem.h b/Source/WebCore/dom/DataTransferItem.h
>index 91ebda1a4e6f752707e5f78b249926c38113725f..b4ff59945af9c9ea4c1cf8bfb30660ea836ae684 100644
>--- a/Source/WebCore/dom/DataTransferItem.h
>+++ b/Source/WebCore/dom/DataTransferItem.h
>@@ -36,7 +36,7 @@
> #include <wtf/Forward.h>
> #include <wtf/RefCounted.h>
> #include <wtf/WeakPtr.h>
>-#include <wtf/text/AtomicString.h>
>+#include <wtf/text/AtomString.h>
> 
> namespace WebCore {
> 
>diff --git a/Source/WebCore/dom/DatasetDOMStringMap.cpp b/Source/WebCore/dom/DatasetDOMStringMap.cpp
>index a6aeedc0e7eb62f68a1d2d9848ce06addcc0b6f8..d789cc7fa4b671876e8c636c2b230ae16663c743 100644
>--- a/Source/WebCore/dom/DatasetDOMStringMap.cpp
>+++ b/Source/WebCore/dom/DatasetDOMStringMap.cpp
>@@ -29,7 +29,7 @@
> #include "Element.h"
> #include <wtf/ASCIICType.h>
> #include <wtf/IsoMallocInlines.h>
>-#include <wtf/text/AtomicString.h>
>+#include <wtf/text/AtomString.h>
> #include <wtf/text/StringBuilder.h>
> 
> namespace WebCore {
>@@ -109,7 +109,7 @@ static bool isValidPropertyName(const String& name)
> }
> 
> template<typename CharacterType>
>-static inline AtomicString convertPropertyNameToAttributeName(const StringImpl& name)
>+static inline AtomString convertPropertyNameToAttributeName(const StringImpl& name)
> {
> const CharacterType dataPrefix[] = { 'd', 'a', 't', 'a', '-' };
> 
>@@ -129,10 +129,10 @@ static inline AtomicString convertPropertyNameToAttributeName(const StringImpl&
> } else
> buffer.append(character);
> }
>- return AtomicString(buffer.data(), buffer.size());
>+ return AtomString(buffer.data(), buffer.size());
> }
> 
>-static AtomicString convertPropertyNameToAttributeName(const String& name)
>+static AtomString convertPropertyNameToAttributeName(const String& name)
> {
> if (name.isNull())
> return nullAtom();
>@@ -161,7 +161,7 @@ bool DatasetDOMStringMap::isSupportedPropertyName(const String& propertyName) co
> auto attributeIteratorAccessor = m_element.attributesIterator();
> if (attributeIteratorAccessor.attributeCount() == 1) {
> // If the node has a single attribute, it is the dataset member accessed in most cases.
>- // Building a new AtomicString in that case is overkill so we do a direct character comparison.
>+ // Building a new AtomString in that case is overkill so we do a direct character comparison.
> const auto& attribute = *attributeIteratorAccessor.begin();
> if (propertyNameMatchesAttributeName(propertyName, attribute.localName()))
> return true;
>@@ -191,19 +191,19 @@ Vector<String> DatasetDOMStringMap::supportedPropertyNames() const
> return names;
> }
> 
>-const AtomicString* DatasetDOMStringMap::item(const String& propertyName) const
>+const AtomString* DatasetDOMStringMap::item(const String& propertyName) const
> {
> if (m_element.hasAttributes()) {
> AttributeIteratorAccessor attributeIteratorAccessor = m_element.attributesIterator();
> 
> if (attributeIteratorAccessor.attributeCount() == 1) {
> // If the node has a single attribute, it is the dataset member accessed in most cases.
>- // Building a new AtomicString in that case is overkill so we do a direct character comparison.
>+ // Building a new AtomString in that case is overkill so we do a direct character comparison.
> const Attribute& attribute = *attributeIteratorAccessor.begin();
> if (propertyNameMatchesAttributeName(propertyName, attribute.localName()))
> return &attribute.value();
> } else {
>- AtomicString attributeName = convertPropertyNameToAttributeName(propertyName);
>+ AtomString attributeName = convertPropertyNameToAttributeName(propertyName);
> for (const Attribute& attribute : attributeIteratorAccessor) {
> if (attribute.localName() == attributeName)
> return &attribute.value();
>@@ -214,7 +214,7 @@ const AtomicString* DatasetDOMStringMap::item(const String& propertyName) const
> return nullptr;
> }
> 
>-String DatasetDOMStringMap::namedItem(const AtomicString& name) const
>+String DatasetDOMStringMap::namedItem(const AtomString& name) const
> {
> if (const auto* value = item(name))
> return *value;
>diff --git a/Source/WebCore/dom/DatasetDOMStringMap.h b/Source/WebCore/dom/DatasetDOMStringMap.h
>index 3fdb547fa17525fb9c3a278ed3036d5d05a7cf70..f1a98acddcdb6e9fe9e89073435221caed5927d4 100644
>--- a/Source/WebCore/dom/DatasetDOMStringMap.h
>+++ b/Source/WebCore/dom/DatasetDOMStringMap.h
>@@ -46,14 +46,14 @@ public:
> bool isSupportedPropertyName(const String& name) const;
> Vector<String> supportedPropertyNames() const;
> 
>- String namedItem(const AtomicString& name) const;
>+ String namedItem(const AtomString& name) const;
> ExceptionOr<void> setNamedItem(const String& name, const String& value);
> bool deleteNamedProperty(const String& name);
> 
> Element& element() { return m_element; }
> 
> private:
>- const AtomicString* item(const String& name) const;
>+ const AtomString* item(const String& name) const;
> 
> Element& m_element;
> };
>diff --git a/Source/WebCore/dom/DeviceMotionEvent.cpp b/Source/WebCore/dom/DeviceMotionEvent.cpp
>index 90d702dc39052d0fc76de08415da47b8373b2d96..c51402aa94b573b1451a9f023a82cf2e82c9c161 100644
>--- a/Source/WebCore/dom/DeviceMotionEvent.cpp
>+++ b/Source/WebCore/dom/DeviceMotionEvent.cpp
>@@ -37,7 +37,7 @@ DeviceMotionEvent::DeviceMotionEvent()
> {
> }
> 
>-DeviceMotionEvent::DeviceMotionEvent(const AtomicString& eventType, DeviceMotionData* deviceMotionData)
>+DeviceMotionEvent::DeviceMotionEvent(const AtomString& eventType, DeviceMotionData* deviceMotionData)
> : Event(eventType, CanBubble::No, IsCancelable::No)
> , m_deviceMotionData(deviceMotionData)
> {
>@@ -101,7 +101,7 @@ Optional<double> DeviceMotionEvent::interval() const
> return m_deviceMotionData->interval();
> }
> 
>-void DeviceMotionEvent::initDeviceMotionEvent(const AtomicString& type, bool bubbles, bool cancelable, Optional<DeviceMotionEvent::Acceleration>&& acceleration, Optional<DeviceMotionEvent::Acceleration>&& accelerationIncludingGravity, Optional<DeviceMotionEvent::RotationRate>&& rotationRate, Optional<double> interval)
>+void DeviceMotionEvent::initDeviceMotionEvent(const AtomString& type, bool bubbles, bool cancelable, Optional<DeviceMotionEvent::Acceleration>&& acceleration, Optional<DeviceMotionEvent::Acceleration>&& accelerationIncludingGravity, Optional<DeviceMotionEvent::RotationRate>&& rotationRate, Optional<double> interval)
> {
> if (isBeingDispatched())
> return;
>diff --git a/Source/WebCore/dom/DeviceMotionEvent.h b/Source/WebCore/dom/DeviceMotionEvent.h
>index 51d71a0e7cd7843d1582b039cce23a827253e9fc..9ea18345b487743d08d7f7021653da3612645697 100644
>--- a/Source/WebCore/dom/DeviceMotionEvent.h
>+++ b/Source/WebCore/dom/DeviceMotionEvent.h
>@@ -50,7 +50,7 @@ public:
> Optional<double> gamma;
> };
> 
>- static Ref<DeviceMotionEvent> create(const AtomicString& eventType, DeviceMotionData* deviceMotionData)
>+ static Ref<DeviceMotionEvent> create(const AtomString& eventType, DeviceMotionData* deviceMotionData)
> {
> return adoptRef(*new DeviceMotionEvent(eventType, deviceMotionData));
> }
>@@ -65,11 +65,11 @@ public:
> Optional<RotationRate> rotationRate() const;
> Optional<double> interval() const;
> 
>- void initDeviceMotionEvent(const AtomicString& type, bool bubbles, bool cancelable, Optional<Acceleration>&&, Optional<Acceleration>&&, Optional<RotationRate>&&, Optional<double>);
>+ void initDeviceMotionEvent(const AtomString& type, bool bubbles, bool cancelable, Optional<Acceleration>&&, Optional<Acceleration>&&, Optional<RotationRate>&&, Optional<double>);
> 
> private:
> DeviceMotionEvent();
>- DeviceMotionEvent(const AtomicString& eventType, DeviceMotionData*);
>+ DeviceMotionEvent(const AtomString& eventType, DeviceMotionData*);
> 
> EventInterface eventInterface() const override;
> 
>diff --git a/Source/WebCore/dom/DeviceOrientationEvent.cpp b/Source/WebCore/dom/DeviceOrientationEvent.cpp
>index e821b6553108a120c0fb27127ba5755190e71e1e..3d946cbccc3bdb57236ba85ab22a6127d679d9c5 100644
>--- a/Source/WebCore/dom/DeviceOrientationEvent.cpp
>+++ b/Source/WebCore/dom/DeviceOrientationEvent.cpp
>@@ -37,7 +37,7 @@ DeviceOrientationEvent::DeviceOrientationEvent()
> {
> }
> 
>-DeviceOrientationEvent::DeviceOrientationEvent(const AtomicString& eventType, DeviceOrientationData* orientation)
>+DeviceOrientationEvent::DeviceOrientationEvent(const AtomString& eventType, DeviceOrientationData* orientation)
> : Event(eventType, CanBubble::No, IsCancelable::No)
> , m_orientation(orientation)
> {
>@@ -70,7 +70,7 @@ Optional<double> DeviceOrientationEvent::compassAccuracy() const
> return m_orientation->compassAccuracy();
> }
> 
>-void DeviceOrientationEvent::initDeviceOrientationEvent(const AtomicString& type, bool bubbles, bool cancelable, Optional<double> alpha, Optional<double> beta, Optional<double> gamma, Optional<double> compassHeading, Optional<double> compassAccuracy)
>+void DeviceOrientationEvent::initDeviceOrientationEvent(const AtomString& type, bool bubbles, bool cancelable, Optional<double> alpha, Optional<double> beta, Optional<double> gamma, Optional<double> compassHeading, Optional<double> compassAccuracy)
> {
> if (isBeingDispatched())
> return;
>@@ -86,7 +86,7 @@ Optional<bool> DeviceOrientationEvent::absolute() const
> return m_orientation->absolute();
> }
> 
>-void DeviceOrientationEvent::initDeviceOrientationEvent(const AtomicString& type, bool bubbles, bool cancelable, Optional<double> alpha, Optional<double> beta, Optional<double> gamma, Optional<bool> absolute)
>+void DeviceOrientationEvent::initDeviceOrientationEvent(const AtomString& type, bool bubbles, bool cancelable, Optional<double> alpha, Optional<double> beta, Optional<double> gamma, Optional<bool> absolute)
> {
> if (isBeingDispatched())
> return;
>diff --git a/Source/WebCore/dom/DeviceOrientationEvent.h b/Source/WebCore/dom/DeviceOrientationEvent.h
>index 628708b6e84b52618e9683cd6cde67f3fa1168f3..abb39405de6cea0102ef9af16645e7cf5e9a4743 100644
>--- a/Source/WebCore/dom/DeviceOrientationEvent.h
>+++ b/Source/WebCore/dom/DeviceOrientationEvent.h
>@@ -34,7 +34,7 @@ class DeviceOrientationData;
> 
> class DeviceOrientationEvent final : public Event, public DeviceOrientationOrMotionEvent {
> public:
>- static Ref<DeviceOrientationEvent> create(const AtomicString& eventType, DeviceOrientationData* orientation)
>+ static Ref<DeviceOrientationEvent> create(const AtomString& eventType, DeviceOrientationData* orientation)
> {
> return adoptRef(*new DeviceOrientationEvent(eventType, orientation));
> }
>@@ -54,16 +54,16 @@ public:
> Optional<double> compassHeading() const;
> Optional<double> compassAccuracy() const;
> 
>- void initDeviceOrientationEvent(const AtomicString& type, bool bubbles, bool cancelable, Optional<double> alpha, Optional<double> beta, Optional<double> gamma, Optional<double> compassHeading, Optional<double> compassAccuracy);
>+ void initDeviceOrientationEvent(const AtomString& type, bool bubbles, bool cancelable, Optional<double> alpha, Optional<double> beta, Optional<double> gamma, Optional<double> compassHeading, Optional<double> compassAccuracy);
> #else
> Optional<bool> absolute() const;
> 
>- void initDeviceOrientationEvent(const AtomicString& type, bool bubbles, bool cancelable, Optional<double> alpha, Optional<double> beta, Optional<double> gamma, Optional<bool> absolute);
>+ void initDeviceOrientationEvent(const AtomString& type, bool bubbles, bool cancelable, Optional<double> alpha, Optional<double> beta, Optional<double> gamma, Optional<bool> absolute);
> #endif
> 
> private:
> DeviceOrientationEvent();
>- DeviceOrientationEvent(const AtomicString& eventType, DeviceOrientationData*);
>+ DeviceOrientationEvent(const AtomString& eventType, DeviceOrientationData*);
> 
> EventInterface eventInterface() const override;
> 
>diff --git a/Source/WebCore/dom/Document.cpp b/Source/WebCore/dom/Document.cpp
>index a2edab1f3f6a05409b649a9f33867d4043db3494..4457d13f81edaf7f20a872173ea71a1a6f205732 100644
>--- a/Source/WebCore/dom/Document.cpp
>+++ b/Source/WebCore/dom/Document.cpp
>@@ -893,12 +893,12 @@ static ALWAYS_INLINE Ref<HTMLElement> createUpgradeCandidateElement(Document& do
> return element;
> }
> 
>-static ALWAYS_INLINE Ref<HTMLElement> createUpgradeCandidateElement(Document& document, const AtomicString& localName)
>+static ALWAYS_INLINE Ref<HTMLElement> createUpgradeCandidateElement(Document& document, const AtomString& localName)
> {
> return createUpgradeCandidateElement(document, QualifiedName { nullAtom(), localName, xhtmlNamespaceURI });
> }
> 
>-static inline bool isValidHTMLElementName(const AtomicString& localName)
>+static inline bool isValidHTMLElementName(const AtomString& localName)
> {
> return Document::isValidName(localName);
> }
>@@ -929,7 +929,7 @@ static ExceptionOr<Ref<Element>> createHTMLElementWithNameValidation(Document& d
> return Ref<Element> { createUpgradeCandidateElement(document, name) };
> }
> 
>-ExceptionOr<Ref<Element>> Document::createElementForBindings(const AtomicString& name)
>+ExceptionOr<Ref<Element>> Document::createElementForBindings(const AtomString& name)
> {
> if (isHTMLDocument())
> return createHTMLElementWithNameValidation(*this, name.convertToASCIILowercase());
>@@ -1174,7 +1174,7 @@ static inline bool isPotentialCustomElementNameCharacter(UChar32 character)
> return std::binary_search(std::begin(ranges), std::end(ranges), character);
> }
> 
>-CustomElementNameValidationStatus Document::validateCustomElementName(const AtomicString& localName)
>+CustomElementNameValidationStatus Document::validateCustomElementName(const AtomString& localName)
> {
> if (!isASCIILower(localName[0]))
> return CustomElementNameValidationStatus::FirstCharacterIsNotLowercaseASCIILetter;
>@@ -1195,7 +1195,7 @@ CustomElementNameValidationStatus Document::validateCustomElementName(const Atom
> #if ENABLE(MATHML)
> const auto& annotationXmlLocalName = MathMLNames::annotation_xmlTag->localName();
> #else
>- static NeverDestroyed<const AtomicString> annotationXmlLocalName("annotation-xml", AtomicString::ConstructFromLiteral);
>+ static NeverDestroyed<const AtomString> annotationXmlLocalName("annotation-xml", AtomString::ConstructFromLiteral);
> #endif
> 
> if (localName == SVGNames::color_profileTag->localName()
>@@ -1211,7 +1211,7 @@ CustomElementNameValidationStatus Document::validateCustomElementName(const Atom
> return CustomElementNameValidationStatus::Valid;
> }
> 
>-ExceptionOr<Ref<Element>> Document::createElementNS(const AtomicString& namespaceURI, const String& qualifiedName)
>+ExceptionOr<Ref<Element>> Document::createElementNS(const AtomString& namespaceURI, const String& qualifiedName)
> {
> auto parseResult = parseQualifiedName(namespaceURI, qualifiedName);
> if (parseResult.hasException())
>@@ -1340,7 +1340,7 @@ void Document::setVisualUpdatesAllowedByClient(bool visualUpdatesAllowedByClient
> 
> String Document::characterSetWithUTF8Fallback() const
> {
>- AtomicString name = encoding();
>+ AtomString name = encoding();
> if (!name.isNull())
> return name;
> return UTF8Encoding().domName();
>@@ -2698,7 +2698,7 @@ ScriptableDocumentParser* Document::scriptableDocumentParser() const
> return parser() ? parser()->asScriptableDocumentParser() : nullptr;
> }
> 
>-ExceptionOr<RefPtr<WindowProxy>> Document::openForBindings(DOMWindow& activeWindow, DOMWindow& firstWindow, const String& url, const AtomicString& name, const String& features)
>+ExceptionOr<RefPtr<WindowProxy>> Document::openForBindings(DOMWindow& activeWindow, DOMWindow& firstWindow, const String& url, const AtomString& name, const String& features)
> {
> if (!m_domWindow)
> return Exception { InvalidAccessError };
>@@ -3221,12 +3221,12 @@ void Document::setBaseURLOverride(const URL& url)
> void Document::processBaseElement()
> {
> // Find the first href attribute in a base element and the first target attribute in a base element.
>- const AtomicString* href = nullptr;
>- const AtomicString* target = nullptr;
>+ const AtomString* href = nullptr;
>+ const AtomString* target = nullptr;
> auto baseDescendants = descendantsOfType<HTMLBaseElement>(*this);
> for (auto& base : baseDescendants) {
> if (!href) {
>- const AtomicString& value = base.attributeWithoutSynchronization(hrefAttr);
>+ const AtomString& value = base.attributeWithoutSynchronization(hrefAttr);
> if (!value.isNull()) {
> href = &value;
> if (target)
>@@ -3234,7 +3234,7 @@ void Document::processBaseElement()
> }
> }
> if (!target) {
>- const AtomicString& value = base.attributeWithoutSynchronization(targetAttr);
>+ const AtomString& value = base.attributeWithoutSynchronization(targetAttr);
> if (!value.isNull()) {
> target = &value;
> if (href)
>@@ -4546,26 +4546,26 @@ Document& Document::contextDocument() const
> return const_cast<Document&>(*this);
> }
> 
>-void Document::setAttributeEventListener(const AtomicString& eventType, const QualifiedName& attributeName, const AtomicString& attributeValue, DOMWrapperWorld& isolatedWorld)
>+void Document::setAttributeEventListener(const AtomString& eventType, const QualifiedName& attributeName, const AtomString& attributeValue, DOMWrapperWorld& isolatedWorld)
> {
> setAttributeEventListener(eventType, JSLazyEventListener::create(*this, attributeName, attributeValue), isolatedWorld);
> }
> 
>-void Document::setWindowAttributeEventListener(const AtomicString& eventType, RefPtr<EventListener>&& listener, DOMWrapperWorld& isolatedWorld)
>+void Document::setWindowAttributeEventListener(const AtomString& eventType, RefPtr<EventListener>&& listener, DOMWrapperWorld& isolatedWorld)
> {
> if (!m_domWindow)
> return;
> m_domWindow->setAttributeEventListener(eventType, WTFMove(listener), isolatedWorld);
> }
> 
>-void Document::setWindowAttributeEventListener(const AtomicString& eventType, const QualifiedName& attributeName, const AtomicString& attributeValue, DOMWrapperWorld& isolatedWorld)
>+void Document::setWindowAttributeEventListener(const AtomString& eventType, const QualifiedName& attributeName, const AtomString& attributeValue, DOMWrapperWorld& isolatedWorld)
> {
> if (!m_domWindow)
> return;
> setWindowAttributeEventListener(eventType, JSLazyEventListener::create(*m_domWindow, attributeName, attributeValue), isolatedWorld);
> }
> 
>-EventListener* Document::getWindowAttributeEventListener(const AtomicString& eventType, DOMWrapperWorld& isolatedWorld)
>+EventListener* Document::getWindowAttributeEventListener(const AtomString& eventType, DOMWrapperWorld& isolatedWorld)
> {
> if (!m_domWindow)
> return nullptr;
>@@ -4704,7 +4704,7 @@ bool Document::hasListenerTypeForEventType(PlatformEvent::Type eventType) const
> }
> }
> 
>-void Document::addListenerTypeIfNeeded(const AtomicString& eventType)
>+void Document::addListenerTypeIfNeeded(const AtomString& eventType)
> {
> if (eventType == eventNames().DOMSubtreeModifiedEvent)
> addListenerType(DOMSUBTREEMODIFIED_LISTENER);
>@@ -4963,7 +4963,7 @@ bool Document::isValidName(const String& name)
> return isValidNameNonASCII(characters, length);
> }
> 
>-ExceptionOr<std::pair<AtomicString, AtomicString>> Document::parseQualifiedName(const String& qualifiedName)
>+ExceptionOr<std::pair<AtomString, AtomString>> Document::parseQualifiedName(const String& qualifiedName)
> {
> unsigned length = qualifiedName.length();
> 
>@@ -4994,15 +4994,15 @@ ExceptionOr<std::pair<AtomicString, AtomicString>> Document::parseQualifiedName(
> }
> 
> if (!sawColon)
>- return std::pair<AtomicString, AtomicString> { { }, { qualifiedName } };
>+ return std::pair<AtomString, AtomString> { { }, { qualifiedName } };
> 
> if (!colonPosition || length - colonPosition <= 1)
> return Exception { InvalidCharacterError };
> 
>- return std::pair<AtomicString, AtomicString> { StringView { qualifiedName }.substring(0, colonPosition).toAtomicString(), StringView { qualifiedName }.substring(colonPosition + 1).toAtomicString() };
>+ return std::pair<AtomString, AtomString> { StringView { qualifiedName }.substring(0, colonPosition).toAtomString(), StringView { qualifiedName }.substring(colonPosition + 1).toAtomString() };
> }
> 
>-ExceptionOr<QualifiedName> Document::parseQualifiedName(const AtomicString& namespaceURI, const String& qualifiedName)
>+ExceptionOr<QualifiedName> Document::parseQualifiedName(const AtomString& namespaceURI, const String& qualifiedName)
> {
> auto parseResult = parseQualifiedName(qualifiedName);
> if (parseResult.hasException())
>@@ -5522,7 +5522,7 @@ ExceptionOr<Ref<Attr>> Document::createAttribute(const String& name)
> return createAttributeNS({ }, isHTMLDocument() ? name.convertToASCIILowercase() : name, true);
> }
> 
>-ExceptionOr<Ref<Attr>> Document::createAttributeNS(const AtomicString& namespaceURI, const String& qualifiedName, bool shouldIgnoreNamespaceChecks)
>+ExceptionOr<Ref<Attr>> Document::createAttributeNS(const AtomString& namespaceURI, const String& qualifiedName, bool shouldIgnoreNamespaceChecks)
> {
> auto parseResult = parseQualifiedName(namespaceURI, qualifiedName);
> if (parseResult.hasException())
>@@ -5614,17 +5614,17 @@ Ref<HTMLCollection> Document::all()
> return ensureRareData().ensureNodeLists().addCachedCollection<HTMLAllCollection>(*this, DocAll);
> }
> 
>-Ref<HTMLCollection> Document::allFilteredByName(const AtomicString& name)
>+Ref<HTMLCollection> Document::allFilteredByName(const AtomString& name)
> {
> return ensureRareData().ensureNodeLists().addCachedCollection<HTMLAllNamedSubCollection>(*this, DocumentAllNamedItems, name);
> }
> 
>-Ref<HTMLCollection> Document::windowNamedItems(const AtomicString& name)
>+Ref<HTMLCollection> Document::windowNamedItems(const AtomString& name)
> {
> return ensureRareData().ensureNodeLists().addCachedCollection<WindowNameCollection>(*this, WindowNamedItems, name);
> }
> 
>-Ref<HTMLCollection> Document::documentNamedItems(const AtomicString& name)
>+Ref<HTMLCollection> Document::documentNamedItems(const AtomString& name)
> {
> return ensureRareData().ensureNodeLists().addCachedCollection<DocumentNameCollection>(*this, DocumentNamedItems, name);
> }
>@@ -6839,9 +6839,9 @@ bool Document::haveStylesheetsLoaded() const
> return !styleScope().hasPendingSheets() || m_ignorePendingStylesheets;
> }
> 
>-Locale& Document::getCachedLocale(const AtomicString& locale)
>+Locale& Document::getCachedLocale(const AtomString& locale)
> {
>- AtomicString localeKey = locale;
>+ AtomString localeKey = locale;
> if (locale.isEmpty() || !settings().langAttributeAwareFormControlUIEnabled())
> localeKey = defaultLanguage();
> LocaleIdentifierToLocaleMap::AddResult result = m_localeCache.add(localeKey, nullptr);
>@@ -7566,7 +7566,7 @@ void Document::updateResizeObservations(Page& page)
> }
> #endif
> 
>-const AtomicString& Document::dir() const
>+const AtomString& Document::dir() const
> {
> auto* documentElement = this->documentElement();
> if (!is<HTMLHtmlElement>(documentElement))
>@@ -7574,7 +7574,7 @@ const AtomicString& Document::dir() const
> return downcast<HTMLHtmlElement>(*documentElement).dir();
> }
> 
>-void Document::setDir(const AtomicString& value)
>+void Document::setDir(const AtomString& value)
> {
> auto* documentElement = this->documentElement();
> if (is<HTMLHtmlElement>(documentElement))
>@@ -7668,7 +7668,7 @@ void Document::forEachApplicationStateChangeListener(const Function<void(Applica
> functor(*listener);
> }
> 
>-const AtomicString& Document::bgColor() const
>+const AtomString& Document::bgColor() const
> {
> auto* bodyElement = body();
> if (!bodyElement)
>@@ -7682,7 +7682,7 @@ void Document::setBgColor(const String& value)
> bodyElement->setAttributeWithoutSynchronization(bgcolorAttr, value);
> }
> 
>-const AtomicString& Document::fgColor() const
>+const AtomString& Document::fgColor() const
> {
> auto* bodyElement = body();
> if (!bodyElement)
>@@ -7696,7 +7696,7 @@ void Document::setFgColor(const String& value)
> bodyElement->setAttributeWithoutSynchronization(textAttr, value);
> }
> 
>-const AtomicString& Document::alinkColor() const
>+const AtomString& Document::alinkColor() const
> {
> auto* bodyElement = body();
> if (!bodyElement)
>@@ -7710,7 +7710,7 @@ void Document::setAlinkColor(const String& value)
> bodyElement->setAttributeWithoutSynchronization(alinkAttr, value);
> }
> 
>-const AtomicString& Document::linkColorForBindings() const
>+const AtomString& Document::linkColorForBindings() const
> {
> auto* bodyElement = body();
> if (!bodyElement)
>@@ -7724,7 +7724,7 @@ void Document::setLinkColorForBindings(const String& value)
> bodyElement->setAttributeWithoutSynchronization(linkAttr, value);
> }
> 
>-const AtomicString& Document::vlinkColor() const
>+const AtomString& Document::vlinkColor() const
> {
> auto* bodyElement = body();
> if (!bodyElement)
>diff --git a/Source/WebCore/dom/Document.h b/Source/WebCore/dom/Document.h
>index 1b6fafd12af3de7cc012508b08da215fd03c5aed..5ba7496601bb877b2b55d97d6725cd9e798260ff 100644
>--- a/Source/WebCore/dom/Document.h
>+++ b/Source/WebCore/dom/Document.h
>@@ -69,7 +69,7 @@
> #include <wtf/UniqueRef.h>
> #include <wtf/WeakHashSet.h>
> #include <wtf/WeakPtr.h>
>-#include <wtf/text/AtomicStringHash.h>
>+#include <wtf/text/AtomStringHash.h>
> 
> #if PLATFORM(IOS_FAMILY)
> #include "EventTrackingRegions.h"
>@@ -429,19 +429,19 @@ public:
> 
> bool hasManifest() const;
> 
>- WEBCORE_EXPORT ExceptionOr<Ref<Element>> createElementForBindings(const AtomicString& tagName);
>+ WEBCORE_EXPORT ExceptionOr<Ref<Element>> createElementForBindings(const AtomString& tagName);
> WEBCORE_EXPORT Ref<DocumentFragment> createDocumentFragment();
> WEBCORE_EXPORT Ref<Text> createTextNode(const String& data);
> WEBCORE_EXPORT Ref<Comment> createComment(const String& data);
> WEBCORE_EXPORT ExceptionOr<Ref<CDATASection>> createCDATASection(const String& data);
> WEBCORE_EXPORT ExceptionOr<Ref<ProcessingInstruction>> createProcessingInstruction(const String& target, const String& data);
> WEBCORE_EXPORT ExceptionOr<Ref<Attr>> createAttribute(const String& name);
>- WEBCORE_EXPORT ExceptionOr<Ref<Attr>> createAttributeNS(const AtomicString& namespaceURI, const String& qualifiedName, bool shouldIgnoreNamespaceChecks = false);
>+ WEBCORE_EXPORT ExceptionOr<Ref<Attr>> createAttributeNS(const AtomString& namespaceURI, const String& qualifiedName, bool shouldIgnoreNamespaceChecks = false);
> WEBCORE_EXPORT ExceptionOr<Ref<Node>> importNode(Node& nodeToImport, bool deep);
>- WEBCORE_EXPORT ExceptionOr<Ref<Element>> createElementNS(const AtomicString& namespaceURI, const String& qualifiedName);
>+ WEBCORE_EXPORT ExceptionOr<Ref<Element>> createElementNS(const AtomString& namespaceURI, const String& qualifiedName);
> WEBCORE_EXPORT Ref<Element> createElement(const QualifiedName&, bool createdByParser);
> 
>- static CustomElementNameValidationStatus validateCustomElementName(const AtomicString&);
>+ static CustomElementNameValidationStatus validateCustomElementName(const AtomString&);
> 
> WEBCORE_EXPORT RefPtr<Range> caretRangeFromPoint(int x, int y);
> RefPtr<Range> caretRangeFromPoint(const LayoutPoint& clientPoint);
>@@ -458,7 +458,7 @@ public:
> WEBCORE_EXPORT String characterSetWithUTF8Fallback() const;
> TextEncoding textEncoding() const;
> 
>- AtomicString encoding() const { return textEncoding().domName(); }
>+ AtomString encoding() const { return textEncoding().domName(); }
> 
> WEBCORE_EXPORT void setCharset(const String&); // Used by ObjC / GOBject bindings only.
> 
>@@ -505,10 +505,10 @@ public:
> WEBCORE_EXPORT Ref<HTMLCollection> anchors();
> WEBCORE_EXPORT Ref<HTMLCollection> scripts();
> Ref<HTMLCollection> all();
>- Ref<HTMLCollection> allFilteredByName(const AtomicString&);
>+ Ref<HTMLCollection> allFilteredByName(const AtomString&);
> 
>- Ref<HTMLCollection> windowNamedItems(const AtomicString&);
>- Ref<HTMLCollection> documentNamedItems(const AtomicString&);
>+ Ref<HTMLCollection> windowNamedItems(const AtomString&);
>+ Ref<HTMLCollection> documentNamedItems(const AtomString&);
> 
> // Other methods (not part of DOM)
> bool isSynthesized() const { return m_isSynthesized; }
>@@ -638,7 +638,7 @@ public:
> 
> WEBCORE_EXPORT DocumentLoader* loader() const;
> 
>- WEBCORE_EXPORT ExceptionOr<RefPtr<WindowProxy>> openForBindings(DOMWindow& activeWindow, DOMWindow& firstDOMWindow, const String& url, const AtomicString& name, const String& features);
>+ WEBCORE_EXPORT ExceptionOr<RefPtr<WindowProxy>> openForBindings(DOMWindow& activeWindow, DOMWindow& firstDOMWindow, const String& url, const AtomString& name, const String& features);
> WEBCORE_EXPORT ExceptionOr<Document&> openForBindings(Document* responsibleDocument, const String&, const String&);
> 
> // FIXME: We should rename this at some point and give back the name 'open' to the HTML specified ones.
>@@ -823,9 +823,9 @@ public:
> void setContextDocument(Document& document) { m_contextDocument = makeWeakPtr(document); }
> 
> // Helper functions for forwarding DOMWindow event related tasks to the DOMWindow if it exists.
>- void setWindowAttributeEventListener(const AtomicString& eventType, const QualifiedName& attributeName, const AtomicString& value, DOMWrapperWorld&);
>- void setWindowAttributeEventListener(const AtomicString& eventType, RefPtr<EventListener>&&, DOMWrapperWorld&);
>- EventListener* getWindowAttributeEventListener(const AtomicString& eventType, DOMWrapperWorld&);
>+ void setWindowAttributeEventListener(const AtomString& eventType, const QualifiedName& attributeName, const AtomString& value, DOMWrapperWorld&);
>+ void setWindowAttributeEventListener(const AtomString& eventType, RefPtr<EventListener>&&, DOMWrapperWorld&);
>+ EventListener* getWindowAttributeEventListener(const AtomString& eventType, DOMWrapperWorld&);
> WEBCORE_EXPORT void dispatchWindowEvent(Event&, EventTarget* = nullptr);
> void dispatchWindowLoadEvent();
> 
>@@ -856,7 +856,7 @@ public:
> 
> bool hasListenerType(ListenerType listenerType) const { return (m_listenerTypes & listenerType); }
> bool hasListenerTypeForEventType(PlatformEvent::Type) const;
>- void addListenerTypeIfNeeded(const AtomicString& eventType);
>+ void addListenerTypeIfNeeded(const AtomString& eventType);
> 
> bool hasMutationObserversOfType(MutationObserver::MutationType type) const
> {
>@@ -899,8 +899,8 @@ public:
> const String& title() const { return m_title.string; }
> WEBCORE_EXPORT void setTitle(const String&);
> 
>- WEBCORE_EXPORT const AtomicString& dir() const;
>- WEBCORE_EXPORT void setDir(const AtomicString&);
>+ WEBCORE_EXPORT const AtomString& dir() const;
>+ WEBCORE_EXPORT void setDir(const AtomString&);
> 
> void titleElementAdded(Element& titleElement);
> void titleElementRemoved(Element& titleElement);
>@@ -962,8 +962,8 @@ public:
> 
> // The following breaks a qualified name into a prefix and a local name.
> // It also does a validity check, and returns an error if the qualified name is invalid.
>- static ExceptionOr<std::pair<AtomicString, AtomicString>> parseQualifiedName(const String& qualifiedName);
>- static ExceptionOr<QualifiedName> parseQualifiedName(const AtomicString& namespaceURI, const String& qualifiedName);
>+ static ExceptionOr<std::pair<AtomString, AtomString>> parseQualifiedName(const String& qualifiedName);
>+ static ExceptionOr<QualifiedName> parseQualifiedName(const AtomString& namespaceURI, const String& qualifiedName);
> 
> // Checks to make sure prefix and namespace do not conflict (per DOM Core 3)
> static bool hasValidNamespaceForElements(const QualifiedName&);
>@@ -1297,7 +1297,7 @@ public:
> void updateTextRenderer(Text&, unsigned offsetOfReplacedText, unsigned lengthOfReplacedText);
> 
> // Return a Locale for the default locale if the argument is null or empty.
>- Locale& getCachedLocale(const AtomicString& locale = nullAtom());
>+ Locale& getCachedLocale(const AtomString& locale = nullAtom());
> 
> const Document* templateDocument() const;
> Document& ensureTemplateDocument();
>@@ -1413,7 +1413,7 @@ public:
> #endif
> 
> using ContainerNode::setAttributeEventListener;
>- void setAttributeEventListener(const AtomicString& eventType, const QualifiedName& attributeName, const AtomicString& value, DOMWrapperWorld& isolatedWorld);
>+ void setAttributeEventListener(const AtomString& eventType, const QualifiedName& attributeName, const AtomString& value, DOMWrapperWorld& isolatedWorld);
> 
> DOMSelection* getSelection();
> 
>@@ -1429,15 +1429,15 @@ public:
> void orientationChanged(int orientation);
> OrientationNotifier& orientationNotifier() { return m_orientationNotifier; }
> 
>- WEBCORE_EXPORT const AtomicString& bgColor() const;
>+ WEBCORE_EXPORT const AtomString& bgColor() const;
> WEBCORE_EXPORT void setBgColor(const String&);
>- WEBCORE_EXPORT const AtomicString& fgColor() const;
>+ WEBCORE_EXPORT const AtomString& fgColor() const;
> WEBCORE_EXPORT void setFgColor(const String&);
>- WEBCORE_EXPORT const AtomicString& alinkColor() const;
>+ WEBCORE_EXPORT const AtomString& alinkColor() const;
> WEBCORE_EXPORT void setAlinkColor(const String&);
>- WEBCORE_EXPORT const AtomicString& linkColorForBindings() const;
>+ WEBCORE_EXPORT const AtomString& linkColorForBindings() const;
> WEBCORE_EXPORT void setLinkColorForBindings(const String&);
>- WEBCORE_EXPORT const AtomicString& vlinkColor() const;
>+ WEBCORE_EXPORT const AtomString& vlinkColor() const;
> WEBCORE_EXPORT void setVlinkColor(const String&);
> 
> // Per https://html.spec.whatwg.org/multipage/obsolete.html#dom-document-clear, this method does nothing.
>@@ -1856,7 +1856,7 @@ private:
> 
> std::unique_ptr<DocumentSharedObjectPool> m_sharedObjectPool;
> 
>- typedef HashMap<AtomicString, std::unique_ptr<Locale>> LocaleIdentifierToLocaleMap;
>+ typedef HashMap<AtomString, std::unique_ptr<Locale>> LocaleIdentifierToLocaleMap;
> LocaleIdentifierToLocaleMap m_localeCache;
> 
> RefPtr<Document> m_templateDocument;
>diff --git a/Source/WebCore/dom/Document.idl b/Source/WebCore/dom/Document.idl
>index 5649b6c3c70850a9ce4680ec18de5bfdb23271c0..f4675762d42b32f485aa086e65dd1602fe15e4b3 100644
>--- a/Source/WebCore/dom/Document.idl
>+++ b/Source/WebCore/dom/Document.idl
>@@ -100,7 +100,7 @@ typedef (
> readonly attribute HTMLCollection links; // Should be [SameObject].
> readonly attribute HTMLCollection forms; // Should be [SameObject].
> readonly attribute HTMLCollection scripts; // Should be [SameObject].
>- NodeList getElementsByName([AtomicString] DOMString elementName);
>+ NodeList getElementsByName([AtomString] DOMString elementName);
> readonly attribute HTMLScriptElement? currentScript; // FIXME: Should return a HTMLOrSVGScriptElement.
> 
> // dynamic markup insertion
>diff --git a/Source/WebCore/dom/DocumentFragment.cpp b/Source/WebCore/dom/DocumentFragment.cpp
>index 29bcf4c6f1e44d53b70a0a71cda11923fd423840..8f21b27935037619eb103b94cc20c72cbb711a18 100644
>--- a/Source/WebCore/dom/DocumentFragment.cpp
>+++ b/Source/WebCore/dom/DocumentFragment.cpp
>@@ -93,7 +93,7 @@ bool DocumentFragment::parseXML(const String& source, Element* contextElement, P
> return XMLDocumentParser::parseDocumentFragment(source, *this, contextElement, parserContentPolicy);
> }
> 
>-Element* DocumentFragment::getElementById(const AtomicString& id) const
>+Element* DocumentFragment::getElementById(const AtomString& id) const
> {
> if (id.isNull())
> return nullptr;
>diff --git a/Source/WebCore/dom/DocumentFragment.h b/Source/WebCore/dom/DocumentFragment.h
>index d1c9322895a3a9d522b0ee2536798b7912361909..f9f9ba08c1a86f52f7e57dba80db3d1e842dd154 100644
>--- a/Source/WebCore/dom/DocumentFragment.h
>+++ b/Source/WebCore/dom/DocumentFragment.h
>@@ -40,7 +40,7 @@ public:
> virtual bool isTemplateContent() const { return false; }
> 
> // From the NonElementParentNode interface - https://dom.spec.whatwg.org/#interface-nonelementparentnode
>- WEBCORE_EXPORT Element* getElementById(const AtomicString&) const;
>+ WEBCORE_EXPORT Element* getElementById(const AtomString&) const;
> 
> protected:
> DocumentFragment(Document&, ConstructionType = CreateContainer);
>diff --git a/Source/WebCore/dom/Element.cpp b/Source/WebCore/dom/Element.cpp
>index b1090d93041457cd3a196e8931ca42a625c8ec50..f07c5ec61d275bc903a468d6a4de49847e67f317 100644
>--- a/Source/WebCore/dom/Element.cpp
>+++ b/Source/WebCore/dom/Element.cpp
>@@ -169,9 +169,9 @@ static Attr* findAttrNodeInList(Vector<RefPtr<Attr>>& attrNodeList, const Qualif
> return nullptr;
> }
> 
>-static Attr* findAttrNodeInList(Vector<RefPtr<Attr>>& attrNodeList, const AtomicString& localName, bool shouldIgnoreAttributeCase)
>+static Attr* findAttrNodeInList(Vector<RefPtr<Attr>>& attrNodeList, const AtomString& localName, bool shouldIgnoreAttributeCase)
> {
>- const AtomicString& caseAdjustedName = shouldIgnoreAttributeCase ? localName.convertToASCIILowercase() : localName;
>+ const AtomString& caseAdjustedName = shouldIgnoreAttributeCase ? localName.convertToASCIILowercase() : localName;
> for (auto& node : attrNodeList) {
> if (node->qualifiedName().localName() == caseAdjustedName)
> return node.get();
>@@ -297,7 +297,7 @@ static bool isCompatibilityMouseEvent(const MouseEvent& mouseEvent)
> }
> #endif
> 
>-bool Element::dispatchMouseEvent(const PlatformMouseEvent& platformEvent, const AtomicString& eventType, int detail, Element* relatedTarget)
>+bool Element::dispatchMouseEvent(const PlatformMouseEvent& platformEvent, const AtomString& eventType, int detail, Element* relatedTarget)
> {
> if (isDisabledFormControl())
> return false;
>@@ -518,14 +518,14 @@ ALWAYS_INLINE void Element::synchronizeAttribute(const QualifiedName& name) cons
> downcast<SVGElement>(const_cast<Element&>(*this)).synchronizeAttribute(name);
> }
> 
>-static ALWAYS_INLINE bool isStyleAttribute(const Element& element, const AtomicString& attributeLocalName)
>+static ALWAYS_INLINE bool isStyleAttribute(const Element& element, const AtomString& attributeLocalName)
> {
> if (shouldIgnoreAttributeCase(element))
> return equalLettersIgnoringASCIICase(attributeLocalName, "style");
> return attributeLocalName == styleAttr->localName();
> }
> 
>-ALWAYS_INLINE void Element::synchronizeAttribute(const AtomicString& localName) const
>+ALWAYS_INLINE void Element::synchronizeAttribute(const AtomString& localName) const
> {
> // This version of synchronizeAttribute() is streamlined for the case where you don't have a full QualifiedName,
> // e.g when called from DOM API.
>@@ -541,7 +541,7 @@ ALWAYS_INLINE void Element::synchronizeAttribute(const AtomicString& localName)
> downcast<SVGElement>(const_cast<Element&>(*this)).synchronizeAttribute(QualifiedName(nullAtom(), localName, nullAtom()));
> }
> 
>-const AtomicString& Element::getAttribute(const QualifiedName& name) const
>+const AtomString& Element::getAttribute(const QualifiedName& name) const
> {
> if (!elementData())
> return nullAtom();
>@@ -1490,7 +1490,7 @@ IntRect Element::screenRect() const
> return IntRect();
> }
> 
>-const AtomicString& Element::getAttribute(const AtomicString& qualifiedName) const
>+const AtomString& Element::getAttribute(const AtomString& qualifiedName) const
> {
> if (!elementData())
> return nullAtom();
>@@ -1500,13 +1500,13 @@ const AtomicString& Element::getAttribute(const AtomicString& qualifiedName) con
> return nullAtom();
> }
> 
>-const AtomicString& Element::getAttributeNS(const AtomicString& namespaceURI, const AtomicString& localName) const
>+const AtomString& Element::getAttributeNS(const AtomString& namespaceURI, const AtomString& localName) const
> {
> return getAttribute(QualifiedName(nullAtom(), localName, namespaceURI));
> }
> 
> // https://dom.spec.whatwg.org/#dom-element-toggleattribute
>-ExceptionOr<bool> Element::toggleAttribute(const AtomicString& qualifiedName, Optional<bool> force)
>+ExceptionOr<bool> Element::toggleAttribute(const AtomString& qualifiedName, Optional<bool> force)
> {
> if (!Document::isValidName(qualifiedName))
> return Exception { InvalidCharacterError };
>@@ -1530,7 +1530,7 @@ ExceptionOr<bool> Element::toggleAttribute(const AtomicString& qualifiedName, Op
> return true;
> }
> 
>-ExceptionOr<void> Element::setAttribute(const AtomicString& qualifiedName, const AtomicString& value)
>+ExceptionOr<void> Element::setAttribute(const AtomString& qualifiedName, const AtomString& value)
> {
> if (!Document::isValidName(qualifiedName))
> return Exception { InvalidCharacterError };
>@@ -1544,26 +1544,26 @@ ExceptionOr<void> Element::setAttribute(const AtomicString& qualifiedName, const
> return { };
> }
> 
>-void Element::setAttribute(const QualifiedName& name, const AtomicString& value)
>+void Element::setAttribute(const QualifiedName& name, const AtomString& value)
> {
> synchronizeAttribute(name);
> unsigned index = elementData() ? elementData()->findAttributeIndexByName(name) : ElementData::attributeNotFound;
> setAttributeInternal(index, name, value, NotInSynchronizationOfLazyAttribute);
> }
> 
>-void Element::setAttributeWithoutSynchronization(const QualifiedName& name, const AtomicString& value)
>+void Element::setAttributeWithoutSynchronization(const QualifiedName& name, const AtomString& value)
> {
> unsigned index = elementData() ? elementData()->findAttributeIndexByName(name) : ElementData::attributeNotFound;
> setAttributeInternal(index, name, value, NotInSynchronizationOfLazyAttribute);
> }
> 
>-void Element::setSynchronizedLazyAttribute(const QualifiedName& name, const AtomicString& value)
>+void Element::setSynchronizedLazyAttribute(const QualifiedName& name, const AtomString& value)
> {
> unsigned index = elementData() ? elementData()->findAttributeIndexByName(name) : ElementData::attributeNotFound;
> setAttributeInternal(index, name, value, InSynchronizationOfLazyAttribute);
> }
> 
>-inline void Element::setAttributeInternal(unsigned index, const QualifiedName& name, const AtomicString& newValue, SynchronizationOfLazyAttribute inSynchronizationOfLazyAttribute)
>+inline void Element::setAttributeInternal(unsigned index, const QualifiedName& name, const AtomString& newValue, SynchronizationOfLazyAttribute inSynchronizationOfLazyAttribute)
> {
> if (newValue.isNull()) {
> if (index != ElementData::attributeNotFound)
>@@ -1583,7 +1583,7 @@ inline void Element::setAttributeInternal(unsigned index, const QualifiedName& n
> 
> const Attribute& attribute = attributeAt(index);
> QualifiedName attributeName = attribute.name();
>- AtomicString oldValue = attribute.value();
>+ AtomString oldValue = attribute.value();
> 
> willModifyAttribute(attributeName, oldValue, newValue);
> 
>@@ -1595,14 +1595,14 @@ inline void Element::setAttributeInternal(unsigned index, const QualifiedName& n
> didModifyAttribute(attributeName, oldValue, newValue);
> }
> 
>-static inline AtomicString makeIdForStyleResolution(const AtomicString& value, bool inQuirksMode)
>+static inline AtomString makeIdForStyleResolution(const AtomString& value, bool inQuirksMode)
> {
> if (inQuirksMode)
> return value.convertToASCIILowercase();
> return value;
> }
> 
>-void Element::attributeChanged(const QualifiedName& name, const AtomicString& oldValue, const AtomicString& newValue, AttributeModificationReason)
>+void Element::attributeChanged(const QualifiedName& name, const AtomString& oldValue, const AtomString& newValue, AttributeModificationReason)
> {
> bool valueIsSameAsBefore = oldValue == newValue;
> 
>@@ -1612,8 +1612,8 @@ void Element::attributeChanged(const QualifiedName& name, const AtomicString& ol
> else if (name == HTMLNames::classAttr)
> classAttributeChanged(newValue);
> else if (name == HTMLNames::idAttr) {
>- AtomicString oldId = elementData()->idForStyleResolution();
>- AtomicString newId = makeIdForStyleResolution(newValue, document().inQuirksMode());
>+ AtomString oldId = elementData()->idForStyleResolution();
>+ AtomString newId = makeIdForStyleResolution(newValue, document().inQuirksMode());
> if (newId != oldId) {
> Style::IdChangeInvalidation styleInvalidation(*this, oldId, newId);
> elementData()->setIdForStyleResolution(newId);
>@@ -1667,7 +1667,7 @@ static inline bool classStringHasClassName(const CharacterType* characters, unsi
> return i < length;
> }
> 
>-static inline bool classStringHasClassName(const AtomicString& newClassString)
>+static inline bool classStringHasClassName(const AtomString& newClassString)
> {
> unsigned length = newClassString.length();
> 
>@@ -1679,7 +1679,7 @@ static inline bool classStringHasClassName(const AtomicString& newClassString)
> return classStringHasClassName(newClassString.characters16(), length);
> }
> 
>-void Element::classAttributeChanged(const AtomicString& newClassString)
>+void Element::classAttributeChanged(const AtomString& newClassString)
> {
> // Note: We'll need ElementData, but it doesn't have to be UniqueElementData.
> if (!elementData())
>@@ -1706,7 +1706,7 @@ URL Element::absoluteLinkURL() const
> if (!isLink())
> return URL();
> 
>- AtomicString linkAttribute;
>+ AtomString linkAttribute;
> if (hasTagName(SVGNames::aTag))
> linkAttribute = getAttribute(SVGNames::hrefAttr, XLinkNames::hrefAttr);
> else
>@@ -1924,7 +1924,7 @@ String Element::nodeNamePreservingCase() const
> return m_tagName.toString();
> }
> 
>-ExceptionOr<void> Element::setPrefix(const AtomicString& prefix)
>+ExceptionOr<void> Element::setPrefix(const AtomString& prefix)
> {
> auto result = checkSetPrefix(prefix);
> if (result.hasException())
>@@ -1934,7 +1934,7 @@ ExceptionOr<void> Element::setPrefix(const AtomicString& prefix)
> return { };
> }
> 
>-const AtomicString& Element::imageSourceURL() const
>+const AtomString& Element::imageSourceURL() const
> {
> return attributeWithoutSynchronization(srcAttr);
> }
>@@ -1972,7 +1972,7 @@ Node::InsertedIntoAncestorResult Element::insertedIntoAncestor(InsertionType ins
> if (!insertionType.treeScopeChanged)
> newScope = nullptr;
> 
>- const AtomicString& idValue = getIdAttribute();
>+ const AtomString& idValue = getIdAttribute();
> if (!idValue.isNull()) {
> if (newScope)
> updateIdForTreeScope(*newScope, nullAtom(), idValue);
>@@ -1980,7 +1980,7 @@ Node::InsertedIntoAncestorResult Element::insertedIntoAncestor(InsertionType ins
> updateIdForDocument(*newDocument, nullAtom(), idValue, AlwaysUpdateHTMLDocumentNamedItemMaps);
> }
> 
>- const AtomicString& nameValue = getNameAttribute();
>+ const AtomString& nameValue = getNameAttribute();
> if (!nameValue.isNull()) {
> if (newScope)
> updateNameForTreeScope(*newScope, nullAtom(), nameValue);
>@@ -2032,7 +2032,7 @@ void Element::removedFromAncestor(RemovalType removalType, ContainerNode& oldPar
> if (!removalType.treeScopeChanged)
> oldScope = nullptr;
> 
>- const AtomicString& idValue = getIdAttribute();
>+ const AtomString& idValue = getIdAttribute();
> if (!idValue.isNull()) {
> if (oldScope)
> updateIdForTreeScope(*oldScope, idValue, nullAtom());
>@@ -2040,7 +2040,7 @@ void Element::removedFromAncestor(RemovalType removalType, ContainerNode& oldPar
> updateIdForDocument(*oldHTMLDocument, idValue, nullAtom(), AlwaysUpdateHTMLDocumentNamedItemMaps);
> }
> 
>- const AtomicString& nameValue = getNameAttribute();
>+ const AtomString& nameValue = getNameAttribute();
> if (!nameValue.isNull()) {
> if (oldScope)
> updateNameForTreeScope(*oldScope, nameValue, nullAtom());
>@@ -2149,7 +2149,7 @@ void Element::removeShadowRoot()
> 
> static bool canAttachAuthorShadowRoot(const Element& element)
> {
>- static NeverDestroyed<HashSet<AtomicString>> tagNames = [] {
>+ static NeverDestroyed<HashSet<AtomString>> tagNames = [] {
> static const HTMLQualifiedName* const tagList[] = {
> &articleTag.get(),
> &asideTag.get(),
>@@ -2169,7 +2169,7 @@ static bool canAttachAuthorShadowRoot(const Element& element)
> &sectionTag.get(),
> &spanTag.get()
> };
>- HashSet<AtomicString> set;
>+ HashSet<AtomString> set;
> for (auto& name : tagList)
> set.add(name->localName());
> return set;
>@@ -2279,7 +2279,7 @@ CustomElementReactionQueue* Element::reactionQueue() const
> return elementRareData()->customElementReactionQueue();
> }
> 
>-const AtomicString& Element::shadowPseudoId() const
>+const AtomString& Element::shadowPseudoId() const
> {
> return pseudo();
> }
>@@ -2437,7 +2437,7 @@ void Element::childrenChanged(const ChildChange& change)
> }
> }
> 
>-void Element::setAttributeEventListener(const AtomicString& eventType, const QualifiedName& attributeName, const AtomicString& attributeValue)
>+void Element::setAttributeEventListener(const AtomString& eventType, const QualifiedName& attributeName, const AtomString& attributeValue)
> {
> setAttributeEventListener(eventType, JSLazyEventListener::create(*this, attributeName, attributeValue), mainThreadNormalWorld());
> }
>@@ -2614,7 +2614,7 @@ ExceptionOr<Ref<Attr>> Element::removeAttributeNode(Attr& attr)
> return oldAttrNode;
> }
> 
>-ExceptionOr<QualifiedName> Element::parseAttributeName(const AtomicString& namespaceURI, const AtomicString& qualifiedName)
>+ExceptionOr<QualifiedName> Element::parseAttributeName(const AtomString& namespaceURI, const AtomString& qualifiedName)
> {
> auto parseResult = Document::parseQualifiedName(namespaceURI, qualifiedName);
> if (parseResult.hasException())
>@@ -2625,7 +2625,7 @@ ExceptionOr<QualifiedName> Element::parseAttributeName(const AtomicString& names
> return parsedAttributeName;
> }
> 
>-ExceptionOr<void> Element::setAttributeNS(const AtomicString& namespaceURI, const AtomicString& qualifiedName, const AtomicString& value)
>+ExceptionOr<void> Element::setAttributeNS(const AtomString& namespaceURI, const AtomString& qualifiedName, const AtomString& value)
> {
> auto result = parseAttributeName(namespaceURI, qualifiedName);
> if (result.hasException())
>@@ -2641,7 +2641,7 @@ void Element::removeAttributeInternal(unsigned index, SynchronizationOfLazyAttri
> UniqueElementData& elementData = ensureUniqueElementData();
> 
> QualifiedName name = elementData.attributeAt(index).name();
>- AtomicString valueBeingRemoved = elementData.attributeAt(index).value();
>+ AtomString valueBeingRemoved = elementData.attributeAt(index).value();
> 
> if (RefPtr<Attr> attrNode = attrIfExists(name))
> detachAttrNodeFromElementWithValue(attrNode.get(), elementData.attributeAt(index).value());
>@@ -2661,7 +2661,7 @@ void Element::removeAttributeInternal(unsigned index, SynchronizationOfLazyAttri
> didRemoveAttribute(name, valueBeingRemoved);
> }
> 
>-void Element::addAttributeInternal(const QualifiedName& name, const AtomicString& value, SynchronizationOfLazyAttribute inSynchronizationOfLazyAttribute)
>+void Element::addAttributeInternal(const QualifiedName& name, const AtomString& value, SynchronizationOfLazyAttribute inSynchronizationOfLazyAttribute)
> {
> if (inSynchronizationOfLazyAttribute) {
> ensureUniqueElementData().addAttribute(name, value);
>@@ -2676,12 +2676,12 @@ void Element::addAttributeInternal(const QualifiedName& name, const AtomicString
> didAddAttribute(name, value);
> }
> 
>-bool Element::removeAttribute(const AtomicString& qualifiedName)
>+bool Element::removeAttribute(const AtomString& qualifiedName)
> {
> if (!elementData())
> return false;
> 
>- AtomicString caseAdjustedQualifiedName = shouldIgnoreAttributeCase(*this) ? qualifiedName.convertToASCIILowercase() : qualifiedName;
>+ AtomString caseAdjustedQualifiedName = shouldIgnoreAttributeCase(*this) ? qualifiedName.convertToASCIILowercase() : qualifiedName;
> unsigned index = elementData()->findAttributeIndexByName(caseAdjustedQualifiedName, false);
> if (index == ElementData::attributeNotFound) {
> if (UNLIKELY(caseAdjustedQualifiedName == styleAttr) && elementData()->styleAttributeIsDirty() && is<StyledElement>(*this))
>@@ -2693,12 +2693,12 @@ bool Element::removeAttribute(const AtomicString& qualifiedName)
> return true;
> }
> 
>-bool Element::removeAttributeNS(const AtomicString& namespaceURI, const AtomicString& localName)
>+bool Element::removeAttributeNS(const AtomString& namespaceURI, const AtomString& localName)
> {
> return removeAttribute(QualifiedName(nullAtom(), localName, namespaceURI));
> }
> 
>-RefPtr<Attr> Element::getAttributeNode(const AtomicString& qualifiedName)
>+RefPtr<Attr> Element::getAttributeNode(const AtomString& qualifiedName)
> {
> if (!elementData())
> return nullptr;
>@@ -2709,7 +2709,7 @@ RefPtr<Attr> Element::getAttributeNode(const AtomicString& qualifiedName)
> return ensureAttr(attribute->name());
> }
> 
>-RefPtr<Attr> Element::getAttributeNodeNS(const AtomicString& namespaceURI, const AtomicString& localName)
>+RefPtr<Attr> Element::getAttributeNodeNS(const AtomString& namespaceURI, const AtomString& localName)
> {
> if (!elementData())
> return 0;
>@@ -2721,7 +2721,7 @@ RefPtr<Attr> Element::getAttributeNodeNS(const AtomicString& namespaceURI, const
> return ensureAttr(attribute->name());
> }
> 
>-bool Element::hasAttribute(const AtomicString& qualifiedName) const
>+bool Element::hasAttribute(const AtomString& qualifiedName) const
> {
> if (!elementData())
> return false;
>@@ -2729,7 +2729,7 @@ bool Element::hasAttribute(const AtomicString& qualifiedName) const
> return elementData()->findAttributeByName(qualifiedName, shouldIgnoreAttributeCase(*this));
> }
> 
>-bool Element::hasAttributeNS(const AtomicString& namespaceURI, const AtomicString& localName) const
>+bool Element::hasAttributeNS(const AtomString& namespaceURI, const AtomString& localName) const
> {
> if (!elementData())
> return false;
>@@ -2830,14 +2830,14 @@ void Element::blur()
> }
> }
> 
>-void Element::dispatchFocusInEvent(const AtomicString& eventType, RefPtr<Element>&& oldFocusedElement)
>+void Element::dispatchFocusInEvent(const AtomString& eventType, RefPtr<Element>&& oldFocusedElement)
> {
> ASSERT_WITH_SECURITY_IMPLICATION(ScriptDisallowedScope::InMainThread::isScriptAllowed());
> ASSERT(eventType == eventNames().focusinEvent || eventType == eventNames().DOMFocusInEvent);
> dispatchScopedEvent(FocusEvent::create(eventType, Event::CanBubble::Yes, Event::IsCancelable::No, document().windowProxy(), 0, WTFMove(oldFocusedElement)));
> }
> 
>-void Element::dispatchFocusOutEvent(const AtomicString& eventType, RefPtr<Element>&& newFocusedElement)
>+void Element::dispatchFocusOutEvent(const AtomString& eventType, RefPtr<Element>&& newFocusedElement)
> {
> ASSERT_WITH_SECURITY_IMPLICATION(ScriptDisallowedScope::InMainThread::isScriptAllowed());
> ASSERT(eventType == eventNames().focusoutEvent || eventType == eventNames().DOMFocusOutEvent);
>@@ -2980,12 +2980,12 @@ String Element::title() const
> return String();
> }
> 
>-const AtomicString& Element::pseudo() const
>+const AtomString& Element::pseudo() const
> {
> return attributeWithoutSynchronization(pseudoAttr);
> }
> 
>-void Element::setPseudo(const AtomicString& value)
>+void Element::setPseudo(const AtomString& value)
> {
> setAttributeWithoutSynchronization(pseudoAttr, value);
> }
>@@ -3253,7 +3253,7 @@ unsigned Element::rareDataChildIndex() const
> return elementRareData()->childIndex();
> }
> 
>-AtomicString Element::computeInheritedLanguage() const
>+AtomString Element::computeInheritedLanguage() const
> {
> if (const ElementData* elementData = this->elementData()) {
> if (const Attribute* attribute = elementData->findLanguageAttribute())
>@@ -3443,7 +3443,7 @@ int Element::getIntegralAttribute(const QualifiedName& attributeName) const
> 
> void Element::setIntegralAttribute(const QualifiedName& attributeName, int value)
> {
>- setAttribute(attributeName, AtomicString::number(value));
>+ setAttribute(attributeName, AtomString::number(value));
> }
> 
> unsigned Element::getUnsignedIntegralAttribute(const QualifiedName& attributeName) const
>@@ -3453,7 +3453,7 @@ unsigned Element::getUnsignedIntegralAttribute(const QualifiedName& attributeNam
> 
> void Element::setUnsignedIntegralAttribute(const QualifiedName& attributeName, unsigned value)
> {
>- setAttribute(attributeName, AtomicString::number(limitToOnlyHTMLNonNegative(value)));
>+ setAttribute(attributeName, AtomString::number(limitToOnlyHTMLNonNegative(value)));
> }
> 
> bool Element::childShouldCreateRenderer(const Node& child) const
>@@ -3589,7 +3589,7 @@ ResizeObserverData* Element::resizeObserverData()
> 
> SpellcheckAttributeState Element::spellcheckAttributeState() const
> {
>- const AtomicString& value = attributeWithoutSynchronization(HTMLNames::spellcheckAttr);
>+ const AtomString& value = attributeWithoutSynchronization(HTMLNames::spellcheckAttr);
> if (value.isNull())
> return SpellcheckAttributeDefault;
> if (value.isEmpty() || equalLettersIgnoringASCIICase(value, "true"))
>@@ -3635,7 +3635,7 @@ bool Element::hasNamedNodeMap() const
> }
> #endif
> 
>-inline void Element::updateName(const AtomicString& oldName, const AtomicString& newName)
>+inline void Element::updateName(const AtomString& oldName, const AtomString& newName)
> {
> if (!isInTreeScope())
> return;
>@@ -3652,7 +3652,7 @@ inline void Element::updateName(const AtomicString& oldName, const AtomicString&
> updateNameForDocument(downcast<HTMLDocument>(document()), oldName, newName);
> }
> 
>-void Element::updateNameForTreeScope(TreeScope& scope, const AtomicString& oldName, const AtomicString& newName)
>+void Element::updateNameForTreeScope(TreeScope& scope, const AtomString& oldName, const AtomString& newName)
> {
> ASSERT(oldName != newName);
> 
>@@ -3662,7 +3662,7 @@ void Element::updateNameForTreeScope(TreeScope& scope, const AtomicString& oldNa
> scope.addElementByName(*newName.impl(), *this);
> }
> 
>-void Element::updateNameForDocument(HTMLDocument& document, const AtomicString& oldName, const AtomicString& newName)
>+void Element::updateNameForDocument(HTMLDocument& document, const AtomString& oldName, const AtomString& newName)
> {
> ASSERT(oldName != newName);
> 
>@@ -3670,7 +3670,7 @@ void Element::updateNameForDocument(HTMLDocument& document, const AtomicString&
> return;
> 
> if (WindowNameCollection::elementMatchesIfNameAttributeMatch(*this)) {
>- const AtomicString& id = WindowNameCollection::elementMatchesIfIdAttributeMatch(*this) ? getIdAttribute() : nullAtom();
>+ const AtomString& id = WindowNameCollection::elementMatchesIfIdAttributeMatch(*this) ? getIdAttribute() : nullAtom();
> if (!oldName.isEmpty() && oldName != id)
> document.removeWindowNamedItem(*oldName.impl(), *this);
> if (!newName.isEmpty() && newName != id)
>@@ -3678,7 +3678,7 @@ void Element::updateNameForDocument(HTMLDocument& document, const AtomicString&
> }
> 
> if (DocumentNameCollection::elementMatchesIfNameAttributeMatch(*this)) {
>- const AtomicString& id = DocumentNameCollection::elementMatchesIfIdAttributeMatch(*this) ? getIdAttribute() : nullAtom();
>+ const AtomString& id = DocumentNameCollection::elementMatchesIfIdAttributeMatch(*this) ? getIdAttribute() : nullAtom();
> if (!oldName.isEmpty() && oldName != id)
> document.removeDocumentNamedItem(*oldName.impl(), *this);
> if (!newName.isEmpty() && newName != id)
>@@ -3686,7 +3686,7 @@ void Element::updateNameForDocument(HTMLDocument& document, const AtomicString&
> }
> }
> 
>-inline void Element::updateId(const AtomicString& oldId, const AtomicString& newId, NotifyObservers notifyObservers)
>+inline void Element::updateId(const AtomString& oldId, const AtomString& newId, NotifyObservers notifyObservers)
> {
> if (!isInTreeScope())
> return;
>@@ -3703,7 +3703,7 @@ inline void Element::updateId(const AtomicString& oldId, const AtomicString& new
> updateIdForDocument(downcast<HTMLDocument>(document()), oldId, newId, UpdateHTMLDocumentNamedItemMapsOnlyIfDiffersFromNameAttribute);
> }
> 
>-void Element::updateIdForTreeScope(TreeScope& scope, const AtomicString& oldId, const AtomicString& newId, NotifyObservers notifyObservers)
>+void Element::updateIdForTreeScope(TreeScope& scope, const AtomString& oldId, const AtomString& newId, NotifyObservers notifyObservers)
> {
> ASSERT(isInTreeScope());
> ASSERT(oldId != newId);
>@@ -3714,7 +3714,7 @@ void Element::updateIdForTreeScope(TreeScope& scope, const AtomicString& oldId,
> scope.addElementById(*newId.impl(), *this, notifyObservers == NotifyObservers::Yes);
> }
> 
>-void Element::updateIdForDocument(HTMLDocument& document, const AtomicString& oldId, const AtomicString& newId, HTMLDocumentNamedItemMapsUpdatingCondition condition)
>+void Element::updateIdForDocument(HTMLDocument& document, const AtomString& oldId, const AtomString& newId, HTMLDocumentNamedItemMapsUpdatingCondition condition)
> {
> ASSERT(isConnected());
> ASSERT(oldId != newId);
>@@ -3723,7 +3723,7 @@ void Element::updateIdForDocument(HTMLDocument& document, const AtomicString& ol
> return;
> 
> if (WindowNameCollection::elementMatchesIfIdAttributeMatch(*this)) {
>- const AtomicString& name = condition == UpdateHTMLDocumentNamedItemMapsOnlyIfDiffersFromNameAttribute && WindowNameCollection::elementMatchesIfNameAttributeMatch(*this) ? getNameAttribute() : nullAtom();
>+ const AtomString& name = condition == UpdateHTMLDocumentNamedItemMapsOnlyIfDiffersFromNameAttribute && WindowNameCollection::elementMatchesIfNameAttributeMatch(*this) ? getNameAttribute() : nullAtom();
> if (!oldId.isEmpty() && oldId != name)
> document.removeWindowNamedItem(*oldId.impl(), *this);
> if (!newId.isEmpty() && newId != name)
>@@ -3731,7 +3731,7 @@ void Element::updateIdForDocument(HTMLDocument& document, const AtomicString& ol
> }
> 
> if (DocumentNameCollection::elementMatchesIfIdAttributeMatch(*this)) {
>- const AtomicString& name = condition == UpdateHTMLDocumentNamedItemMapsOnlyIfDiffersFromNameAttribute && DocumentNameCollection::elementMatchesIfNameAttributeMatch(*this) ? getNameAttribute() : nullAtom();
>+ const AtomString& name = condition == UpdateHTMLDocumentNamedItemMapsOnlyIfDiffersFromNameAttribute && DocumentNameCollection::elementMatchesIfNameAttributeMatch(*this) ? getNameAttribute() : nullAtom();
> if (!oldId.isEmpty() && oldId != name)
> document.removeDocumentNamedItem(*oldId.impl(), *this);
> if (!newId.isEmpty() && newId != name)
>@@ -3739,7 +3739,7 @@ void Element::updateIdForDocument(HTMLDocument& document, const AtomicString& ol
> }
> }
> 
>-void Element::updateLabel(TreeScope& scope, const AtomicString& oldForAttributeValue, const AtomicString& newForAttributeValue)
>+void Element::updateLabel(TreeScope& scope, const AtomString& oldForAttributeValue, const AtomString& newForAttributeValue)
> {
> ASSERT(hasTagName(labelTag));
> 
>@@ -3755,7 +3755,7 @@ void Element::updateLabel(TreeScope& scope, const AtomicString& oldForAttributeV
> scope.addLabel(*newForAttributeValue.impl(), downcast<HTMLLabelElement>(*this));
> }
> 
>-void Element::willModifyAttribute(const QualifiedName& name, const AtomicString& oldValue, const AtomicString& newValue)
>+void Element::willModifyAttribute(const QualifiedName& name, const AtomString& oldValue, const AtomString& newValue)
> {
> if (name == HTMLNames::idAttr)
> updateId(oldValue, newValue, NotifyObservers::No); // Will notify observers after the attribute is actually changed.
>@@ -3772,21 +3772,21 @@ void Element::willModifyAttribute(const QualifiedName& name, const AtomicString&
> InspectorInstrumentation::willModifyDOMAttr(document(), *this, oldValue, newValue);
> }
> 
>-void Element::didAddAttribute(const QualifiedName& name, const AtomicString& value)
>+void Element::didAddAttribute(const QualifiedName& name, const AtomString& value)
> {
> attributeChanged(name, nullAtom(), value);
> InspectorInstrumentation::didModifyDOMAttr(document(), *this, name.localName(), value);
> dispatchSubtreeModifiedEvent();
> }
> 
>-void Element::didModifyAttribute(const QualifiedName& name, const AtomicString& oldValue, const AtomicString& newValue)
>+void Element::didModifyAttribute(const QualifiedName& name, const AtomString& oldValue, const AtomString& newValue)
> {
> attributeChanged(name, oldValue, newValue);
> InspectorInstrumentation::didModifyDOMAttr(document(), *this, name.localName(), newValue);
> // Do not dispatch a DOMSubtreeModified event here; see bug 81141.
> }
> 
>-void Element::didRemoveAttribute(const QualifiedName& name, const AtomicString& oldValue)
>+void Element::didRemoveAttribute(const QualifiedName& name, const AtomString& oldValue)
> {
> attributeChanged(name, oldValue, nullAtom());
> InspectorInstrumentation::didRemoveDOMAttr(document(), *this, name.localName());
>@@ -3805,7 +3805,7 @@ void Element::setSavedLayerScrollPosition(const IntPoint& position)
> ensureElementRareData().setSavedLayerScrollPosition(position);
> }
> 
>-RefPtr<Attr> Element::attrIfExists(const AtomicString& localName, bool shouldIgnoreAttributeCase)
>+RefPtr<Attr> Element::attrIfExists(const AtomString& localName, bool shouldIgnoreAttributeCase)
> {
> if (auto* attrNodeList = attrNodeListForElement(*this))
> return findAttrNodeInList(*attrNodeList, localName, shouldIgnoreAttributeCase);
>@@ -3831,7 +3831,7 @@ Ref<Attr> Element::ensureAttr(const QualifiedName& name)
> return attrNode.releaseNonNull();
> }
> 
>-void Element::detachAttrNodeFromElementWithValue(Attr* attrNode, const AtomicString& value)
>+void Element::detachAttrNodeFromElementWithValue(Attr* attrNode, const AtomString& value)
> {
> ASSERT(hasSyntheticAttrChildNodes());
> attrNode->detachFromElementWithValue(value);
>@@ -3949,14 +3949,14 @@ void Element::cloneAttributesFromElement(const Element& other)
> // Fortunately, those named item maps are only updated when this element is in the document, which should never be the case.
> ASSERT(!isConnected());
> 
>- const AtomicString& oldID = getIdAttribute();
>- const AtomicString& newID = other.getIdAttribute();
>+ const AtomString& oldID = getIdAttribute();
>+ const AtomString& newID = other.getIdAttribute();
> 
> if (!oldID.isNull() || !newID.isNull())
> updateId(oldID, newID, NotifyObservers::No); // Will notify observers after the attribute is actually changed.
> 
>- const AtomicString& oldName = getNameAttribute();
>- const AtomicString& newName = other.getNameAttribute();
>+ const AtomString& oldName = getNameAttribute();
>+ const AtomString& newName = other.getNameAttribute();
> 
> if (!oldName.isNull() || !newName.isNull())
> updateName(oldName, newName);
>@@ -4158,7 +4158,7 @@ Element* Element::findAnchorElementForLink(String& outAnchorName)
> if (!isLink())
> return nullptr;
> 
>- const AtomicString& href = attributeWithoutSynchronization(HTMLNames::hrefAttr);
>+ const AtomString& href = attributeWithoutSynchronization(HTMLNames::hrefAttr);
> if (href.isNull())
> return nullptr;
> 
>diff --git a/Source/WebCore/dom/Element.h b/Source/WebCore/dom/Element.h
>index 784e3cdb5ab673f0667effe0198c1b4c50adc505..4475d758a580e61a7ffb6e9596a81089a73b7cb6 100644
>--- a/Source/WebCore/dom/Element.h
>+++ b/Source/WebCore/dom/Element.h
>@@ -84,12 +84,12 @@ public:
> virtual ~Element();
> 
> WEBCORE_EXPORT bool hasAttribute(const QualifiedName&) const;
>- WEBCORE_EXPORT const AtomicString& getAttribute(const QualifiedName&) const;
>+ WEBCORE_EXPORT const AtomString& getAttribute(const QualifiedName&) const;
> template<typename... QualifiedNames>
>- const AtomicString& getAttribute(const QualifiedName&, const QualifiedNames&...) const;
>- WEBCORE_EXPORT void setAttribute(const QualifiedName&, const AtomicString& value);
>- WEBCORE_EXPORT void setAttributeWithoutSynchronization(const QualifiedName&, const AtomicString& value);
>- void setSynchronizedLazyAttribute(const QualifiedName&, const AtomicString& value);
>+ const AtomString& getAttribute(const QualifiedName&, const QualifiedNames&...) const;
>+ WEBCORE_EXPORT void setAttribute(const QualifiedName&, const AtomString& value);
>+ WEBCORE_EXPORT void setAttributeWithoutSynchronization(const QualifiedName&, const AtomString& value);
>+ void setSynchronizedLazyAttribute(const QualifiedName&, const AtomString& value);
> bool removeAttribute(const QualifiedName&);
> Vector<String> getAttributeNames() const;
> 
>@@ -102,7 +102,7 @@ public:
> // Call this to get the value of an attribute that is known not to be the style
> // attribute or one of the SVG animatable attributes.
> bool hasAttributeWithoutSynchronization(const QualifiedName&) const;
>- const AtomicString& attributeWithoutSynchronization(const QualifiedName&) const;
>+ const AtomString& attributeWithoutSynchronization(const QualifiedName&) const;
> #ifndef NDEBUG
> WEBCORE_EXPORT bool fastAttributeLookupAllowed(const QualifiedName&) const;
> #endif
>@@ -115,27 +115,27 @@ public:
> // in style attribute or one of the SVG animation attributes.
> bool hasAttributesWithoutUpdate() const;
> 
>- WEBCORE_EXPORT bool hasAttribute(const AtomicString& qualifiedName) const;
>- WEBCORE_EXPORT bool hasAttributeNS(const AtomicString& namespaceURI, const AtomicString& localName) const;
>+ WEBCORE_EXPORT bool hasAttribute(const AtomString& qualifiedName) const;
>+ WEBCORE_EXPORT bool hasAttributeNS(const AtomString& namespaceURI, const AtomString& localName) const;
> 
>- WEBCORE_EXPORT const AtomicString& getAttribute(const AtomicString& qualifiedName) const;
>- WEBCORE_EXPORT const AtomicString& getAttributeNS(const AtomicString& namespaceURI, const AtomicString& localName) const;
>+ WEBCORE_EXPORT const AtomString& getAttribute(const AtomString& qualifiedName) const;
>+ WEBCORE_EXPORT const AtomString& getAttributeNS(const AtomString& namespaceURI, const AtomString& localName) const;
> 
>- WEBCORE_EXPORT ExceptionOr<void> setAttribute(const AtomicString& qualifiedName, const AtomicString& value);
>- static ExceptionOr<QualifiedName> parseAttributeName(const AtomicString& namespaceURI, const AtomicString& qualifiedName);
>- WEBCORE_EXPORT ExceptionOr<void> setAttributeNS(const AtomicString& namespaceURI, const AtomicString& qualifiedName, const AtomicString& value);
>+ WEBCORE_EXPORT ExceptionOr<void> setAttribute(const AtomString& qualifiedName, const AtomString& value);
>+ static ExceptionOr<QualifiedName> parseAttributeName(const AtomString& namespaceURI, const AtomString& qualifiedName);
>+ WEBCORE_EXPORT ExceptionOr<void> setAttributeNS(const AtomString& namespaceURI, const AtomString& qualifiedName, const AtomString& value);
> 
>- ExceptionOr<bool> toggleAttribute(const AtomicString& qualifiedName, Optional<bool> force);
>+ ExceptionOr<bool> toggleAttribute(const AtomString& qualifiedName, Optional<bool> force);
> 
>- const AtomicString& getIdAttribute() const;
>- void setIdAttribute(const AtomicString&);
>+ const AtomString& getIdAttribute() const;
>+ void setIdAttribute(const AtomString&);
> 
>- const AtomicString& getNameAttribute() const;
>+ const AtomString& getNameAttribute() const;
> 
> // Call this to get the value of the id attribute for style resolution purposes.
> // The value will already be lowercased if the document is in compatibility mode,
> // so this function is not suitable for non-style uses.
>- const AtomicString& idForStyleResolution() const;
>+ const AtomString& idForStyleResolution() const;
> 
> // Internal methods that assume the existence of attribute storage, one should use hasAttributes()
> // before calling them.
>@@ -144,7 +144,7 @@ public:
> const Attribute& attributeAt(unsigned index) const;
> const Attribute* findAttributeByName(const QualifiedName&) const;
> unsigned findAttributeIndexByName(const QualifiedName& name) const { return elementData()->findAttributeIndexByName(name); }
>- unsigned findAttributeIndexByName(const AtomicString& name, bool shouldIgnoreAttributeCase) const { return elementData()->findAttributeIndexByName(name, shouldIgnoreAttributeCase); }
>+ unsigned findAttributeIndexByName(const AtomString& name, bool shouldIgnoreAttributeCase) const { return elementData()->findAttributeIndexByName(name, shouldIgnoreAttributeCase); }
> 
> WEBCORE_EXPORT void scrollIntoView(Optional<Variant<bool, ScrollIntoViewOptions>>&& arg);
> WEBCORE_EXPORT void scrollIntoView(bool alignToTop = true);
>@@ -201,19 +201,19 @@ public:
> // Returns the absolute bounding box translated into screen coordinates.
> WEBCORE_EXPORT IntRect screenRect() const;
> 
>- WEBCORE_EXPORT bool removeAttribute(const AtomicString& qualifiedName);
>- WEBCORE_EXPORT bool removeAttributeNS(const AtomicString& namespaceURI, const AtomicString& localName);
>+ WEBCORE_EXPORT bool removeAttribute(const AtomString& qualifiedName);
>+ WEBCORE_EXPORT bool removeAttributeNS(const AtomString& namespaceURI, const AtomString& localName);
> 
> Ref<Attr> detachAttribute(unsigned index);
> 
>- WEBCORE_EXPORT RefPtr<Attr> getAttributeNode(const AtomicString& qualifiedName);
>- WEBCORE_EXPORT RefPtr<Attr> getAttributeNodeNS(const AtomicString& namespaceURI, const AtomicString& localName);
>+ WEBCORE_EXPORT RefPtr<Attr> getAttributeNode(const AtomString& qualifiedName);
>+ WEBCORE_EXPORT RefPtr<Attr> getAttributeNodeNS(const AtomString& namespaceURI, const AtomString& localName);
> WEBCORE_EXPORT ExceptionOr<RefPtr<Attr>> setAttributeNode(Attr&);
> WEBCORE_EXPORT ExceptionOr<RefPtr<Attr>> setAttributeNodeNS(Attr&);
> WEBCORE_EXPORT ExceptionOr<Ref<Attr>> removeAttributeNode(Attr&);
> 
> RefPtr<Attr> attrIfExists(const QualifiedName&);
>- RefPtr<Attr> attrIfExists(const AtomicString& localName, bool shouldIgnoreAttributeCase);
>+ RefPtr<Attr> attrIfExists(const AtomString& localName, bool shouldIgnoreAttributeCase);
> Ref<Attr> ensureAttr(const QualifiedName&);
> 
> const Vector<RefPtr<Attr>>& attrNodeList();
>@@ -229,13 +229,13 @@ public:
> bool hasTagName(const SVGQualifiedName& tagName) const { return ContainerNode::hasTagName(tagName); }
> 
> // A fast function for checking the local name against another atomic string.
>- bool hasLocalName(const AtomicString& other) const { return m_tagName.localName() == other; }
>+ bool hasLocalName(const AtomString& other) const { return m_tagName.localName() == other; }
> 
>- const AtomicString& localName() const final { return m_tagName.localName(); }
>- const AtomicString& prefix() const final { return m_tagName.prefix(); }
>- const AtomicString& namespaceURI() const final { return m_tagName.namespaceURI(); }
>+ const AtomString& localName() const final { return m_tagName.localName(); }
>+ const AtomString& prefix() const final { return m_tagName.prefix(); }
>+ const AtomString& namespaceURI() const final { return m_tagName.namespaceURI(); }
> 
>- ExceptionOr<void> setPrefix(const AtomicString&) final;
>+ ExceptionOr<void> setPrefix(const AtomString&) final;
> 
> String nodeName() const override;
> 
>@@ -256,8 +256,8 @@ public:
> };
> 
> // This method is called whenever an attribute is added, changed or removed.
>- virtual void attributeChanged(const QualifiedName&, const AtomicString& oldValue, const AtomicString& newValue, AttributeModificationReason = ModifiedDirectly);
>- virtual void parseAttribute(const QualifiedName&, const AtomicString&) { }
>+ virtual void attributeChanged(const QualifiedName&, const AtomString& oldValue, const AtomString& newValue, AttributeModificationReason = ModifiedDirectly);
>+ virtual void parseAttribute(const QualifiedName&, const AtomString&) { }
> 
> // Only called by the parser immediately after element construction.
> void parserSetAttributes(const Vector<Attribute>&);
>@@ -307,7 +307,7 @@ public:
> CustomElementReactionQueue* reactionQueue() const;
> 
> // FIXME: this should not be virtual, do not override this.
>- virtual const AtomicString& shadowPseudoId() const;
>+ virtual const AtomString& shadowPseudoId() const;
> 
> bool isInActiveChain() const { return isUserActionElement() && isUserActionElementInActiveChain(); }
> bool active() const { return isUserActionElement() && isUserActionElementActive(); }
>@@ -378,7 +378,7 @@ public:
> void setStyleIsAffectedByPreviousSibling() { setFlag(StyleIsAffectedByPreviousSibling); }
> void setChildIndex(unsigned);
> 
>- WEBCORE_EXPORT AtomicString computeInheritedLanguage() const;
>+ WEBCORE_EXPORT AtomString computeInheritedLanguage() const;
> Locale& locale() const;
> 
> virtual void accessKeyAction(bool /*sendToAnyEvent*/) { }
>@@ -391,7 +391,7 @@ public:
> WEBCORE_EXPORT URL getURLAttribute(const QualifiedName&) const;
> URL getNonEmptyURLAttribute(const QualifiedName&) const;
> 
>- virtual const AtomicString& imageSourceURL() const;
>+ virtual const AtomString& imageSourceURL() const;
> virtual String target() const { return String(); }
> 
> static AXTextStateChangeIntent defaultFocusTextStateChangeIntent() { return AXTextStateChangeIntent(AXTextStateChangeTypeSelectionMove, AXTextSelection { AXTextSelectionDirectionDiscontiguous, AXTextSelectionGranularityUnknown, true }); }
>@@ -409,8 +409,8 @@ public:
> 
> virtual String title() const;
> 
>- const AtomicString& pseudo() const;
>- WEBCORE_EXPORT void setPseudo(const AtomicString&);
>+ const AtomString& pseudo() const;
>+ WEBCORE_EXPORT void setPseudo(const AtomString&);
> 
> LayoutSize minimumSizeForResizing() const;
> void setMinimumSizeForResizing(const LayoutSize&);
>@@ -516,12 +516,12 @@ public:
> IntPoint savedLayerScrollPosition() const;
> void setSavedLayerScrollPosition(const IntPoint&);
> 
>- bool dispatchMouseEvent(const PlatformMouseEvent&, const AtomicString& eventType, int clickCount = 0, Element* relatedTarget = nullptr);
>+ bool dispatchMouseEvent(const PlatformMouseEvent&, const AtomString& eventType, int clickCount = 0, Element* relatedTarget = nullptr);
> bool dispatchWheelEvent(const PlatformWheelEvent&);
> bool dispatchKeyEvent(const PlatformKeyboardEvent&);
> void dispatchSimulatedClick(Event* underlyingEvent, SimulatedClickMouseEventOptions = SendNoEvents, SimulatedClickVisualOptions = ShowPressedLook);
>- void dispatchFocusInEvent(const AtomicString& eventType, RefPtr<Element>&& oldFocusedElement);
>- void dispatchFocusOutEvent(const AtomicString& eventType, RefPtr<Element>&& newFocusedElement);
>+ void dispatchFocusInEvent(const AtomString& eventType, RefPtr<Element>&& oldFocusedElement);
>+ void dispatchFocusOutEvent(const AtomString& eventType, RefPtr<Element>&& newFocusedElement);
> virtual void dispatchFocusEvent(RefPtr<Element>&& oldFocusedElement, FocusDirection);
> virtual void dispatchBlurEvent(RefPtr<Element>&& newFocusedElement);
> void dispatchWebKitImageReadyEventForTesting();
>@@ -586,7 +586,7 @@ public:
> void storeDisplayContentsStyle(std::unique_ptr<RenderStyle>);
> 
> using ContainerNode::setAttributeEventListener;
>- void setAttributeEventListener(const AtomicString& eventType, const QualifiedName& attributeName, const AtomicString& value);
>+ void setAttributeEventListener(const AtomString& eventType, const QualifiedName& attributeName, const AtomString& value);
> 
> #if ENABLE(INTERSECTION_OBSERVER)
> IntersectionObserverData& ensureIntersectionObserverData();
>@@ -627,7 +627,7 @@ protected:
> // classAttributeChanged() exists to share code between
> // parseAttribute (called via setAttribute()) and
> // svgAttributeChanged (called when element.className.baseValue is set)
>- void classAttributeChanged(const AtomicString& newClassString);
>+ void classAttributeChanged(const AtomString& newClassString);
> 
> void addShadowRoot(Ref<ShadowRoot>&&);
> 
>@@ -650,25 +650,25 @@ private:
> 
> virtual void didAddUserAgentShadowRoot(ShadowRoot&) { }
> 
>- void didAddAttribute(const QualifiedName&, const AtomicString&);
>- void willModifyAttribute(const QualifiedName&, const AtomicString& oldValue, const AtomicString& newValue);
>- void didModifyAttribute(const QualifiedName&, const AtomicString& oldValue, const AtomicString& newValue);
>- void didRemoveAttribute(const QualifiedName&, const AtomicString& oldValue);
>+ void didAddAttribute(const QualifiedName&, const AtomString&);
>+ void willModifyAttribute(const QualifiedName&, const AtomString& oldValue, const AtomString& newValue);
>+ void didModifyAttribute(const QualifiedName&, const AtomString& oldValue, const AtomString& newValue);
>+ void didRemoveAttribute(const QualifiedName&, const AtomString& oldValue);
> 
> void synchronizeAttribute(const QualifiedName&) const;
>- void synchronizeAttribute(const AtomicString& localName) const;
>+ void synchronizeAttribute(const AtomString& localName) const;
> 
>- void updateName(const AtomicString& oldName, const AtomicString& newName);
>- void updateNameForTreeScope(TreeScope&, const AtomicString& oldName, const AtomicString& newName);
>- void updateNameForDocument(HTMLDocument&, const AtomicString& oldName, const AtomicString& newName);
>+ void updateName(const AtomString& oldName, const AtomString& newName);
>+ void updateNameForTreeScope(TreeScope&, const AtomString& oldName, const AtomString& newName);
>+ void updateNameForDocument(HTMLDocument&, const AtomString& oldName, const AtomString& newName);
> 
> enum class NotifyObservers { No, Yes };
>- void updateId(const AtomicString& oldId, const AtomicString& newId, NotifyObservers = NotifyObservers::Yes);
>- void updateIdForTreeScope(TreeScope&, const AtomicString& oldId, const AtomicString& newId, NotifyObservers = NotifyObservers::Yes);
>+ void updateId(const AtomString& oldId, const AtomString& newId, NotifyObservers = NotifyObservers::Yes);
>+ void updateIdForTreeScope(TreeScope&, const AtomString& oldId, const AtomString& newId, NotifyObservers = NotifyObservers::Yes);
> 
> enum HTMLDocumentNamedItemMapsUpdatingCondition { AlwaysUpdateHTMLDocumentNamedItemMaps, UpdateHTMLDocumentNamedItemMapsOnlyIfDiffersFromNameAttribute };
>- void updateIdForDocument(HTMLDocument&, const AtomicString& oldId, const AtomicString& newId, HTMLDocumentNamedItemMapsUpdatingCondition);
>- void updateLabel(TreeScope&, const AtomicString& oldForAttributeValue, const AtomicString& newForAttributeValue);
>+ void updateIdForDocument(HTMLDocument&, const AtomString& oldId, const AtomString& newId, HTMLDocumentNamedItemMapsUpdatingCondition);
>+ void updateLabel(TreeScope&, const AtomString& oldForAttributeValue, const AtomString& newForAttributeValue);
> 
> ExceptionOr<Node*> insertAdjacent(const String& where, Ref<Node>&& newChild);
> 
>@@ -678,8 +678,8 @@ private:
> bool childTypeAllowed(NodeType) const final;
> 
> enum SynchronizationOfLazyAttribute { NotInSynchronizationOfLazyAttribute, InSynchronizationOfLazyAttribute };
>- void setAttributeInternal(unsigned index, const QualifiedName&, const AtomicString& value, SynchronizationOfLazyAttribute);
>- void addAttributeInternal(const QualifiedName&, const AtomicString& value, SynchronizationOfLazyAttribute);
>+ void setAttributeInternal(unsigned index, const QualifiedName&, const AtomString& value, SynchronizationOfLazyAttribute);
>+ void addAttributeInternal(const QualifiedName&, const AtomString& value, SynchronizationOfLazyAttribute);
> void removeAttributeInternal(unsigned index, SynchronizationOfLazyAttribute);
> 
> LayoutRect absoluteEventBounds(bool& boundsIncludeAllDescendantElements, bool& includesFixedPositionElements);
>@@ -727,7 +727,7 @@ private:
> ElementRareData& ensureElementRareData();
> 
> void detachAllAttrNodesFromElement();
>- void detachAttrNodeFromElementWithValue(Attr*, const AtomicString& value);
>+ void detachAttrNodeFromElementWithValue(Attr*, const AtomString& value);
> 
> // Anyone thinking of using this should call document instead of ownerDocument.
> void ownerDocument() const = delete;
>@@ -771,7 +771,7 @@ inline bool Element::hasAttributeWithoutSynchronization(const QualifiedName& nam
> return elementData() && findAttributeByName(name);
> }
> 
>-inline const AtomicString& Element::attributeWithoutSynchronization(const QualifiedName& name) const
>+inline const AtomString& Element::attributeWithoutSynchronization(const QualifiedName& name) const
> {
> if (elementData()) {
> if (const Attribute* attribute = findAttributeByName(name))
>@@ -785,26 +785,26 @@ inline bool Element::hasAttributesWithoutUpdate() const
> return elementData() && !elementData()->isEmpty();
> }
> 
>-inline const AtomicString& Element::idForStyleResolution() const
>+inline const AtomString& Element::idForStyleResolution() const
> {
> return hasID() ? elementData()->idForStyleResolution() : nullAtom();
> }
> 
>-inline const AtomicString& Element::getIdAttribute() const
>+inline const AtomString& Element::getIdAttribute() const
> {
> if (hasID())
> return elementData()->findAttributeByName(HTMLNames::idAttr)->value();
> return nullAtom();
> }
> 
>-inline const AtomicString& Element::getNameAttribute() const
>+inline const AtomString& Element::getNameAttribute() const
> {
> if (hasName())
> return elementData()->findAttributeByName(HTMLNames::nameAttr)->value();
> return nullAtom();
> }
> 
>-inline void Element::setIdAttribute(const AtomicString& value)
>+inline void Element::setIdAttribute(const AtomString& value)
> {
> setAttributeWithoutSynchronization(HTMLNames::idAttr, value);
> }
>@@ -871,9 +871,9 @@ inline void Element::setHasFocusWithin(bool flag)
> }
> 
> template<typename... QualifiedNames>
>-inline const AtomicString& Element::getAttribute(const QualifiedName& name, const QualifiedNames&... names) const
>+inline const AtomString& Element::getAttribute(const QualifiedName& name, const QualifiedNames&... names) const
> {
>- const AtomicString& value = getAttribute(name);
>+ const AtomString& value = getAttribute(name);
> if (!value.isNull())
> return value;
> return getAttribute(names...);
>diff --git a/Source/WebCore/dom/ElementData.h b/Source/WebCore/dom/ElementData.h
>index f6d1eafd736b2aa826beb2b7fe054ffc2d59b653..7158d1d8fb92c6c600c80903d8a43abd8d9b3411 100644
>--- a/Source/WebCore/dom/ElementData.h
>+++ b/Source/WebCore/dom/ElementData.h
>@@ -88,9 +88,9 @@ public:
> const SpaceSplitString& classNames() const { return m_classNames; }
> static ptrdiff_t classNamesMemoryOffset() { return OBJECT_OFFSETOF(ElementData, m_classNames); }
> 
>- const AtomicString& idForStyleResolution() const { return m_idForStyleResolution; }
>+ const AtomString& idForStyleResolution() const { return m_idForStyleResolution; }
> static ptrdiff_t idForStyleResolutionMemoryOffset() { return OBJECT_OFFSETOF(ElementData, m_idForStyleResolution); }
>- void setIdForStyleResolution(const AtomicString& newId) const { m_idForStyleResolution = newId; }
>+ void setIdForStyleResolution(const AtomString& newId) const { m_idForStyleResolution = newId; }
> 
> const StyleProperties* inlineStyle() const { return m_inlineStyle.get(); }
> const StyleProperties* presentationAttributeStyle() const;
>@@ -102,7 +102,7 @@ public:
> const Attribute& attributeAt(unsigned index) const;
> const Attribute* findAttributeByName(const QualifiedName&) const;
> unsigned findAttributeIndexByName(const QualifiedName&) const;
>- unsigned findAttributeIndexByName(const AtomicString& name, bool shouldIgnoreAttributeCase) const;
>+ unsigned findAttributeIndexByName(const AtomString& name, bool shouldIgnoreAttributeCase) const;
> const Attribute* findLanguageAttribute() const;
> 
> bool hasID() const { return !m_idForStyleResolution.isNull(); }
>@@ -161,7 +161,7 @@ protected:
> 
> mutable RefPtr<StyleProperties> m_inlineStyle;
> mutable SpaceSplitString m_classNames;
>- mutable AtomicString m_idForStyleResolution;
>+ mutable AtomString m_idForStyleResolution;
> 
> private:
> friend class Element;
>@@ -173,7 +173,7 @@ private:
> void destroy();
> 
> const Attribute* attributeBase() const;
>- const Attribute* findAttributeByName(const AtomicString& name, bool shouldIgnoreAttributeCase) const;
>+ const Attribute* findAttributeByName(const AtomString& name, bool shouldIgnoreAttributeCase) const;
> 
> Ref<UniqueElementData> makeUniqueCopy() const;
> };
>@@ -206,7 +206,7 @@ public:
> Ref<ShareableElementData> makeShareableCopy() const;
> 
> // These functions do no error/duplicate checking.
>- void addAttribute(const QualifiedName&, const AtomicString&);
>+ void addAttribute(const QualifiedName&, const AtomString&);
> void removeAttribute(unsigned index);
> 
> Attribute& attributeAt(unsigned index);
>@@ -260,7 +260,7 @@ inline AttributeIteratorAccessor ElementData::attributesIterator() const
> return AttributeIteratorAccessor(downcast<ShareableElementData>(*this).m_attributeArray, arraySize());
> }
> 
>-ALWAYS_INLINE const Attribute* ElementData::findAttributeByName(const AtomicString& name, bool shouldIgnoreAttributeCase) const
>+ALWAYS_INLINE const Attribute* ElementData::findAttributeByName(const AtomString& name, bool shouldIgnoreAttributeCase) const
> {
> unsigned index = findAttributeIndexByName(name, shouldIgnoreAttributeCase);
> if (index != attributeNotFound)
>@@ -280,14 +280,14 @@ ALWAYS_INLINE unsigned ElementData::findAttributeIndexByName(const QualifiedName
> 
> // We use a boolean parameter instead of calling shouldIgnoreAttributeCase so that the caller
> // can tune the behavior (hasAttribute is case sensitive whereas getAttribute is not).
>-ALWAYS_INLINE unsigned ElementData::findAttributeIndexByName(const AtomicString& name, bool shouldIgnoreAttributeCase) const
>+ALWAYS_INLINE unsigned ElementData::findAttributeIndexByName(const AtomString& name, bool shouldIgnoreAttributeCase) const
> {
> unsigned attributeCount = length();
> if (!attributeCount)
> return attributeNotFound;
> 
> const Attribute* attributes = attributeBase();
>- const AtomicString& caseAdjustedName = shouldIgnoreAttributeCase ? name.convertToASCIILowercase() : name;
>+ const AtomString& caseAdjustedName = shouldIgnoreAttributeCase ? name.convertToASCIILowercase() : name;
> 
> unsigned attributeIndex = 0;
> do {
>@@ -322,7 +322,7 @@ inline const Attribute& ElementData::attributeAt(unsigned index) const
> return attributeBase()[index];
> }
> 
>-inline void UniqueElementData::addAttribute(const QualifiedName& attributeName, const AtomicString& value)
>+inline void UniqueElementData::addAttribute(const QualifiedName& attributeName, const AtomString& value)
> {
> m_attributeVector.append(Attribute(attributeName, value));
> }
>diff --git a/Source/WebCore/dom/ErrorEvent.cpp b/Source/WebCore/dom/ErrorEvent.cpp
>index 48dbd1d1a44aea9169505fe32b8b59988f16c154..ab077d6ef2bbf4c6448845681ad19427ec4b58cc 100644
>--- a/Source/WebCore/dom/ErrorEvent.cpp
>+++ b/Source/WebCore/dom/ErrorEvent.cpp
>@@ -40,7 +40,7 @@
> namespace WebCore {
> using namespace JSC;
> 
>-ErrorEvent::ErrorEvent(const AtomicString& type, const Init& initializer, IsTrusted isTrusted)
>+ErrorEvent::ErrorEvent(const AtomString& type, const Init& initializer, IsTrusted isTrusted)
> : Event(type, initializer, isTrusted)
> , m_message(initializer.message)
> , m_fileName(initializer.filename)
>diff --git a/Source/WebCore/dom/ErrorEvent.h b/Source/WebCore/dom/ErrorEvent.h
>index a85e93cca661ab7f4f4063bb1a737c6fa1187c5d..37fe3282c92addeb85cd4508885791a8c4a6e7ac 100644
>--- a/Source/WebCore/dom/ErrorEvent.h
>+++ b/Source/WebCore/dom/ErrorEvent.h
>@@ -54,7 +54,7 @@ public:
> JSC::JSValue error;
> };
> 
>- static Ref<ErrorEvent> create(const AtomicString& type, const Init& initializer, IsTrusted isTrusted = IsTrusted::No)
>+ static Ref<ErrorEvent> create(const AtomString& type, const Init& initializer, IsTrusted isTrusted = IsTrusted::No)
> {
> return adoptRef(*new ErrorEvent(type, initializer, isTrusted));
> }
>@@ -76,7 +76,7 @@ public:
> 
> private:
> ErrorEvent(const String& message, const String& fileName, unsigned lineNumber, unsigned columnNumber, JSC::Strong<JSC::Unknown> error);
>- ErrorEvent(const AtomicString&, const Init&, IsTrusted);
>+ ErrorEvent(const AtomString&, const Init&, IsTrusted);
> 
> bool isErrorEvent() const override;
> 
>diff --git a/Source/WebCore/dom/Event.cpp b/Source/WebCore/dom/Event.cpp
>index c8469c3c4bf05c0718f037cd7b7d97917fccb2a8..9b4fb7276ff00a5e32a3123e39b9e91910e5f163 100644
>--- a/Source/WebCore/dom/Event.cpp
>+++ b/Source/WebCore/dom/Event.cpp
>@@ -35,7 +35,7 @@
> 
> namespace WebCore {
> 
>-ALWAYS_INLINE Event::Event(MonotonicTime createTime, const AtomicString& type, IsTrusted isTrusted, CanBubble canBubble, IsCancelable cancelable, IsComposed composed)
>+ALWAYS_INLINE Event::Event(MonotonicTime createTime, const AtomString& type, IsTrusted isTrusted, CanBubble canBubble, IsCancelable cancelable, IsComposed composed)
> : m_isInitialized { !type.isNull() }
> , m_canBubble { canBubble == CanBubble::Yes }
> , m_cancelable { cancelable == IsCancelable::Yes }
>@@ -58,19 +58,19 @@ Event::Event(IsTrusted isTrusted)
> {
> }
> 
>-Event::Event(const AtomicString& eventType, CanBubble canBubble, IsCancelable isCancelable, IsComposed isComposed)
>+Event::Event(const AtomString& eventType, CanBubble canBubble, IsCancelable isCancelable, IsComposed isComposed)
> : Event { MonotonicTime::now(), eventType, IsTrusted::Yes, canBubble, isCancelable, isComposed }
> {
> ASSERT(!eventType.isNull());
> }
> 
>-Event::Event(const AtomicString& eventType, CanBubble canBubble, IsCancelable isCancelable, IsComposed isComposed, MonotonicTime timestamp, IsTrusted isTrusted)
>+Event::Event(const AtomString& eventType, CanBubble canBubble, IsCancelable isCancelable, IsComposed isComposed, MonotonicTime timestamp, IsTrusted isTrusted)
> : Event { timestamp, eventType, isTrusted, canBubble, isCancelable, isComposed }
> {
> ASSERT(!eventType.isNull());
> }
> 
>-Event::Event(const AtomicString& eventType, const EventInit& initializer, IsTrusted isTrusted)
>+Event::Event(const AtomString& eventType, const EventInit& initializer, IsTrusted isTrusted)
> : Event { MonotonicTime::now(), eventType, isTrusted,
> initializer.bubbles ? CanBubble::Yes : CanBubble::No,
> initializer.cancelable ? IsCancelable::Yes : IsCancelable::No,
>@@ -81,7 +81,7 @@ Event::Event(const AtomicString& eventType, const EventInit& initializer, IsTrus
> 
> Event::~Event() = default;
> 
>-Ref<Event> Event::create(const AtomicString& type, CanBubble canBubble, IsCancelable isCancelable, IsComposed isComposed)
>+Ref<Event> Event::create(const AtomString& type, CanBubble canBubble, IsCancelable isCancelable, IsComposed isComposed)
> {
> return adoptRef(*new Event(type, canBubble, isCancelable, isComposed));
> }
>@@ -91,12 +91,12 @@ Ref<Event> Event::createForBindings()
> return adoptRef(*new Event);
> }
> 
>-Ref<Event> Event::create(const AtomicString& type, const EventInit& initializer, IsTrusted isTrusted)
>+Ref<Event> Event::create(const AtomString& type, const EventInit& initializer, IsTrusted isTrusted)
> {
> return adoptRef(*new Event(type, initializer, isTrusted));
> }
> 
>-void Event::initEvent(const AtomicString& eventTypeArg, bool canBubbleArg, bool cancelableArg)
>+void Event::initEvent(const AtomString& eventTypeArg, bool canBubbleArg, bool cancelableArg)
> {
> if (isBeingDispatched())
> return;
>diff --git a/Source/WebCore/dom/Event.h b/Source/WebCore/dom/Event.h
>index 11360858bf5d4670707b301f79b613cd988dd492..237959be5bb173cb90cb378fc82e2c19814f669e 100644
>--- a/Source/WebCore/dom/Event.h
>+++ b/Source/WebCore/dom/Event.h
>@@ -30,7 +30,7 @@
> #include "ScriptWrappable.h"
> #include <wtf/MonotonicTime.h>
> #include <wtf/TypeCasts.h>
>-#include <wtf/text/AtomicString.h>
>+#include <wtf/text/AtomString.h>
> 
> namespace WebCore {
> 
>@@ -52,18 +52,18 @@ public:
> BUBBLING_PHASE = 3
> };
> 
>- WEBCORE_EXPORT static Ref<Event> create(const AtomicString& type, CanBubble, IsCancelable, IsComposed = IsComposed::No);
>+ WEBCORE_EXPORT static Ref<Event> create(const AtomString& type, CanBubble, IsCancelable, IsComposed = IsComposed::No);
> static Ref<Event> createForBindings();
>- static Ref<Event> create(const AtomicString& type, const EventInit&, IsTrusted = IsTrusted::No);
>+ static Ref<Event> create(const AtomString& type, const EventInit&, IsTrusted = IsTrusted::No);
> 
> virtual ~Event();
> 
>- WEBCORE_EXPORT void initEvent(const AtomicString& type, bool canBubble, bool cancelable);
>+ WEBCORE_EXPORT void initEvent(const AtomString& type, bool canBubble, bool cancelable);
> 
> bool isInitialized() const { return m_isInitialized; }
> 
>- const AtomicString& type() const { return m_type; }
>- void setType(const AtomicString& type) { m_type = type; }
>+ const AtomString& type() const { return m_type; }
>+ void setType(const AtomString& type) { m_type = type; }
> 
> EventTarget* target() const { return m_target.get(); }
> void setTarget(RefPtr<EventTarget>&&);
>@@ -143,14 +143,14 @@ public:
> 
> protected:
> explicit Event(IsTrusted = IsTrusted::No);
>- Event(const AtomicString& type, CanBubble, IsCancelable, IsComposed = IsComposed::No);
>- Event(const AtomicString& type, CanBubble, IsCancelable, IsComposed, MonotonicTime timestamp, IsTrusted isTrusted = IsTrusted::Yes);
>- Event(const AtomicString& type, const EventInit&, IsTrusted);
>+ Event(const AtomString& type, CanBubble, IsCancelable, IsComposed = IsComposed::No);
>+ Event(const AtomString& type, CanBubble, IsCancelable, IsComposed, MonotonicTime timestamp, IsTrusted isTrusted = IsTrusted::Yes);
>+ Event(const AtomString& type, const EventInit&, IsTrusted);
> 
> virtual void receivedTarget() { }
> 
> private:
>- explicit Event(MonotonicTime createTime, const AtomicString& type, IsTrusted, CanBubble, IsCancelable, IsComposed);
>+ explicit Event(MonotonicTime createTime, const AtomString& type, IsTrusted, CanBubble, IsCancelable, IsComposed);
> 
> void setCanceledFlagIfPossible();
> 
>@@ -169,7 +169,7 @@ private:
> 
> unsigned m_eventPhase : 2;
> 
>- AtomicString m_type;
>+ AtomString m_type;
> 
> RefPtr<EventTarget> m_currentTarget;
> const EventPath* m_eventPath { nullptr };
>diff --git a/Source/WebCore/dom/EventListenerMap.cpp b/Source/WebCore/dom/EventListenerMap.cpp
>index bdd2d56ab5b2aa9cee80fc06d928b8e8a20b27bd..d9e66349cbdba0bb81d2acfbfdc0d43378c658db 100644
>--- a/Source/WebCore/dom/EventListenerMap.cpp
>+++ b/Source/WebCore/dom/EventListenerMap.cpp
>@@ -53,7 +53,7 @@ EventListenerMap::EventListenerMap()
> {
> }
> 
>-bool EventListenerMap::containsCapturing(const AtomicString& eventType) const
>+bool EventListenerMap::containsCapturing(const AtomString& eventType) const
> {
> auto* listeners = find(eventType);
> if (!listeners)
>@@ -66,7 +66,7 @@ bool EventListenerMap::containsCapturing(const AtomicString& eventType) const
> return false;
> }
> 
>-bool EventListenerMap::containsActive(const AtomicString& eventType) const
>+bool EventListenerMap::containsActive(const AtomString& eventType) const
> {
> auto* listeners = find(eventType);
> if (!listeners)
>@@ -93,9 +93,9 @@ void EventListenerMap::clear()
> m_entries.clear();
> }
> 
>-Vector<AtomicString> EventListenerMap::eventTypes() const
>+Vector<AtomString> EventListenerMap::eventTypes() const
> {
>- Vector<AtomicString> types;
>+ Vector<AtomString> types;
> types.reserveInitialCapacity(m_entries.size());
> 
> for (auto& entry : m_entries)
>@@ -114,7 +114,7 @@ static inline size_t findListener(const EventListenerVector& listeners, EventLis
> return notFound;
> }
> 
>-void EventListenerMap::replace(const AtomicString& eventType, EventListener& oldListener, Ref<EventListener>&& newListener, const RegisteredEventListener::Options& options)
>+void EventListenerMap::replace(const AtomString& eventType, EventListener& oldListener, Ref<EventListener>&& newListener, const RegisteredEventListener::Options& options)
> {
> auto locker = holdLock(m_lock);
> 
>@@ -129,7 +129,7 @@ void EventListenerMap::replace(const AtomicString& eventType, EventListener& old
> registeredListener = RegisteredEventListener::create(WTFMove(newListener), options);
> }
> 
>-bool EventListenerMap::add(const AtomicString& eventType, Ref<EventListener>&& listener, const RegisteredEventListener::Options& options)
>+bool EventListenerMap::add(const AtomString& eventType, Ref<EventListener>&& listener, const RegisteredEventListener::Options& options)
> {
> auto locker = holdLock(m_lock);
> 
>@@ -159,7 +159,7 @@ static bool removeListenerFromVector(EventListenerVector& listeners, EventListen
> return true;
> }
> 
>-bool EventListenerMap::remove(const AtomicString& eventType, EventListener& listener, bool useCapture)
>+bool EventListenerMap::remove(const AtomString& eventType, EventListener& listener, bool useCapture)
> {
> auto locker = holdLock(m_lock);
> 
>@@ -177,7 +177,7 @@ bool EventListenerMap::remove(const AtomicString& eventType, EventListener& list
> return false;
> }
> 
>-EventListenerVector* EventListenerMap::find(const AtomicString& eventType) const
>+EventListenerVector* EventListenerMap::find(const AtomString& eventType) const
> {
> for (auto& entry : m_entries) {
> if (entry.first == eventType)
>@@ -199,7 +199,7 @@ static void removeFirstListenerCreatedFromMarkup(EventListenerVector& listenerVe
> ASSERT_UNUSED(foundListener, foundListener);
> }
> 
>-void EventListenerMap::removeFirstEventListenerCreatedFromMarkup(const AtomicString& eventType)
>+void EventListenerMap::removeFirstEventListenerCreatedFromMarkup(const AtomString& eventType)
> {
> auto locker = holdLock(m_lock);
> 
>@@ -215,7 +215,7 @@ void EventListenerMap::removeFirstEventListenerCreatedFromMarkup(const AtomicStr
> }
> }
> 
>-static void copyListenersNotCreatedFromMarkupToTarget(const AtomicString& eventType, EventListenerVector& listenerVector, EventTarget* target)
>+static void copyListenersNotCreatedFromMarkupToTarget(const AtomString& eventType, EventListenerVector& listenerVector, EventTarget* target)
> {
> for (auto& registeredListener : listenerVector) {
> // Event listeners created from markup have already been transfered to the shadow tree during cloning.
>diff --git a/Source/WebCore/dom/EventListenerMap.h b/Source/WebCore/dom/EventListenerMap.h
>index ae5f98d23ac3e6855dc30ed66516522ec6ff54c1..ac44760d6e7caa34103b79acc7250f06f0b96c39 100644
>--- a/Source/WebCore/dom/EventListenerMap.h
>+++ b/Source/WebCore/dom/EventListenerMap.h
>@@ -37,7 +37,7 @@
> #include <memory>
> #include <wtf/Forward.h>
> #include <wtf/Lock.h>
>-#include <wtf/text/AtomicString.h>
>+#include <wtf/text/AtomString.h>
> 
> namespace WebCore {
> 
>@@ -50,19 +50,19 @@ public:
> EventListenerMap();
> 
> bool isEmpty() const { return m_entries.isEmpty(); }
>- bool contains(const AtomicString& eventType) const { return find(eventType); }
>- bool containsCapturing(const AtomicString& eventType) const;
>- bool containsActive(const AtomicString& eventType) const;
>+ bool contains(const AtomString& eventType) const { return find(eventType); }
>+ bool containsCapturing(const AtomString& eventType) const;
>+ bool containsActive(const AtomString& eventType) const;
> 
> void clear();
> 
>- void replace(const AtomicString& eventType, EventListener& oldListener, Ref<EventListener>&& newListener, const RegisteredEventListener::Options&);
>- bool add(const AtomicString& eventType, Ref<EventListener>&&, const RegisteredEventListener::Options&);
>- bool remove(const AtomicString& eventType, EventListener&, bool useCapture);
>- WEBCORE_EXPORT EventListenerVector* find(const AtomicString& eventType) const;
>- Vector<AtomicString> eventTypes() const;
>+ void replace(const AtomString& eventType, EventListener& oldListener, Ref<EventListener>&& newListener, const RegisteredEventListener::Options&);
>+ bool add(const AtomString& eventType, Ref<EventListener>&&, const RegisteredEventListener::Options&);
>+ bool remove(const AtomString& eventType, EventListener&, bool useCapture);
>+ WEBCORE_EXPORT EventListenerVector* find(const AtomString& eventType) const;
>+ Vector<AtomString> eventTypes() const;
> 
>- void removeFirstEventListenerCreatedFromMarkup(const AtomicString& eventType);
>+ void removeFirstEventListenerCreatedFromMarkup(const AtomString& eventType);
> void copyEventListenersNotCreatedFromMarkupToTarget(EventTarget*);
> 
> Lock& lock() { return m_lock; }
>@@ -72,7 +72,7 @@ private:
> 
> void assertNoActiveIterators() const;
> 
>- Vector<std::pair<AtomicString, std::unique_ptr<EventListenerVector>>, 2> m_entries;
>+ Vector<std::pair<AtomString, std::unique_ptr<EventListenerVector>>, 2> m_entries;
> 
> #ifndef NDEBUG
> std::atomic<int> m_activeIteratorCount { 0 };
>diff --git a/Source/WebCore/dom/EventNames.cpp b/Source/WebCore/dom/EventNames.cpp
>index fcc5601fc60101737146d5619930cf6e9bdeaa6e..d49f4c4f1dc70e638c6c7ac06029ed916e555f26 100644
>--- a/Source/WebCore/dom/EventNames.cpp
>+++ b/Source/WebCore/dom/EventNames.cpp
>@@ -24,7 +24,7 @@
> namespace WebCore {
> 
> #define INITIALIZE_EVENT_NAME(name) \
>- name##Event(#name, AtomicString::ConstructFromLiteral),
>+ name##Event(#name, AtomString::ConstructFromLiteral),
> 
> EventNames::EventNames()
> : DOM_EVENT_NAMES_FOR_EACH(INITIALIZE_EVENT_NAME) dummy(0)
>diff --git a/Source/WebCore/dom/EventNames.h b/Source/WebCore/dom/EventNames.h
>index eff82d0a205f3503efcf36197ad27319ca0185ab..1dfd9095cc5afd8fe515fb6e8e3af2cea90f6668 100644
>--- a/Source/WebCore/dom/EventNames.h
>+++ b/Source/WebCore/dom/EventNames.h
>@@ -26,7 +26,7 @@
> #include "ThreadGlobalData.h"
> #include <array>
> #include <functional>
>-#include <wtf/text/AtomicString.h>
>+#include <wtf/text/AtomString.h>
> 
> #if ENABLE(TOUCH_EVENTS)
> #include "RuntimeEnabledFeatures.h"
>@@ -335,7 +335,7 @@ struct EventNames {
> WTF_MAKE_NONCOPYABLE(EventNames); WTF_MAKE_FAST_ALLOCATED;
> 
> public:
>-#define DOM_EVENT_NAMES_DECLARE(name) const AtomicString name##Event;
>+#define DOM_EVENT_NAMES_DECLARE(name) const AtomString name##Event;
> DOM_EVENT_NAMES_FOR_EACH(DOM_EVENT_NAMES_DECLARE)
> #undef DOM_EVENT_NAMES_DECLARE
> 
>@@ -355,17 +355,17 @@ public:
> 
> // FIXME: Inelegant to call these both event names and event types.
> // We should choose one term and stick to it.
>- bool isWheelEventType(const AtomicString& eventType) const;
>- bool isGestureEventType(const AtomicString& eventType) const;
>- bool isTouchRelatedEventType(const Document&, const AtomicString& eventType) const;
>- bool isTouchScrollBlockingEventType(const AtomicString& eventType) const;
>+ bool isWheelEventType(const AtomString& eventType) const;
>+ bool isGestureEventType(const AtomString& eventType) const;
>+ bool isTouchRelatedEventType(const Document&, const AtomString& eventType) const;
>+ bool isTouchScrollBlockingEventType(const AtomString& eventType) const;
> #if ENABLE(GAMEPAD)
>- bool isGamepadEventType(const AtomicString& eventType) const;
>+ bool isGamepadEventType(const AtomString& eventType) const;
> #endif
> 
>- std::array<std::reference_wrapper<const AtomicString>, 13> touchRelatedEventNames() const;
>- std::array<std::reference_wrapper<const AtomicString>, 16> extendedTouchRelatedEventNames() const;
>- std::array<std::reference_wrapper<const AtomicString>, 3> gestureEventNames() const;
>+ std::array<std::reference_wrapper<const AtomString>, 13> touchRelatedEventNames() const;
>+ std::array<std::reference_wrapper<const AtomString>, 16> extendedTouchRelatedEventNames() const;
>+ std::array<std::reference_wrapper<const AtomString>, 3> gestureEventNames() const;
> 
> private:
> EventNames(); // Private to prevent accidental call to EventNames() instead of eventNames().
>@@ -381,18 +381,18 @@ inline const EventNames& eventNames()
> return threadGlobalData().eventNames();
> }
> 
>-inline bool EventNames::isGestureEventType(const AtomicString& eventType) const
>+inline bool EventNames::isGestureEventType(const AtomString& eventType) const
> {
> return eventType == gesturestartEvent || eventType == gesturechangeEvent || eventType == gestureendEvent;
> }
> 
>-inline bool EventNames::isTouchScrollBlockingEventType(const AtomicString& eventType) const
>+inline bool EventNames::isTouchScrollBlockingEventType(const AtomString& eventType) const
> {
> return eventType == touchstartEvent
> || eventType == touchmoveEvent;
> }
> 
>-inline bool EventNames::isTouchRelatedEventType(const Document& document, const AtomicString& eventType) const
>+inline bool EventNames::isTouchRelatedEventType(const Document& document, const AtomString& eventType) const
> {
> #if ENABLE(TOUCH_EVENTS)
> if (document.quirks().shouldDispatchSimulatedMouseEvents() || RuntimeEnabledFeatures::sharedFeatures().mouseEventsSimulationEnabled()) {
>@@ -416,30 +416,30 @@ inline bool EventNames::isTouchRelatedEventType(const Document& document, const
> || eventType == pointercancelEvent;
> }
> 
>-inline bool EventNames::isWheelEventType(const AtomicString& eventType) const
>+inline bool EventNames::isWheelEventType(const AtomString& eventType) const
> {
> return eventType == wheelEvent
> || eventType == mousewheelEvent;
> }
> 
>-inline std::array<std::reference_wrapper<const AtomicString>, 13> EventNames::touchRelatedEventNames() const
>+inline std::array<std::reference_wrapper<const AtomString>, 13> EventNames::touchRelatedEventNames() const
> {
> return { { touchstartEvent, touchmoveEvent, touchendEvent, touchcancelEvent, touchforcechangeEvent, pointeroverEvent, pointerenterEvent, pointerdownEvent, pointermoveEvent, pointerupEvent, pointeroutEvent, pointerleaveEvent, pointercancelEvent } };
> }
> 
>-inline std::array<std::reference_wrapper<const AtomicString>, 16> EventNames::extendedTouchRelatedEventNames() const
>+inline std::array<std::reference_wrapper<const AtomString>, 16> EventNames::extendedTouchRelatedEventNames() const
> {
> return { { touchstartEvent, touchmoveEvent, touchendEvent, touchcancelEvent, touchforcechangeEvent, pointeroverEvent, pointerenterEvent, pointerdownEvent, pointermoveEvent, pointerupEvent, pointeroutEvent, pointerleaveEvent, pointercancelEvent, mousedownEvent, mousemoveEvent, mouseupEvent } };
> }
> 
>-inline std::array<std::reference_wrapper<const AtomicString>, 3> EventNames::gestureEventNames() const
>+inline std::array<std::reference_wrapper<const AtomString>, 3> EventNames::gestureEventNames() const
> {
> return { { gesturestartEvent, gesturechangeEvent, gestureendEvent } };
> }
> 
> #if ENABLE(GAMEPAD)
> 
>-inline bool EventNames::isGamepadEventType(const AtomicString& eventType) const
>+inline bool EventNames::isGamepadEventType(const AtomString& eventType) const
> {
> return eventType == gamepadconnectedEvent
> || eventType == gamepaddisconnectedEvent;
>diff --git a/Source/WebCore/dom/EventSender.h b/Source/WebCore/dom/EventSender.h
>index 15cdb1779b200af3692bfee1e70c9ab02c6b34e9..717cc51619134fc3728fd16bf02b52db29efdab5 100644
>--- a/Source/WebCore/dom/EventSender.h
>+++ b/Source/WebCore/dom/EventSender.h
>@@ -33,9 +33,9 @@ namespace WebCore {
> template<typename T> class EventSender {
> WTF_MAKE_NONCOPYABLE(EventSender); WTF_MAKE_FAST_ALLOCATED;
> public:
>- explicit EventSender(const AtomicString& eventType);
>+ explicit EventSender(const AtomString& eventType);
> 
>- const AtomicString& eventType() const { return m_eventType; }
>+ const AtomString& eventType() const { return m_eventType; }
> void dispatchEventSoon(T&);
> void cancelEvent(T&);
> void dispatchPendingEvents();
>@@ -50,13 +50,13 @@ public:
> private:
> void timerFired() { dispatchPendingEvents(); }
> 
>- AtomicString m_eventType;
>+ AtomString m_eventType;
> Timer m_timer;
> Vector<T*> m_dispatchSoonList;
> Vector<T*> m_dispatchingList;
> };
> 
>-template<typename T> EventSender<T>::EventSender(const AtomicString& eventType)
>+template<typename T> EventSender<T>::EventSender(const AtomString& eventType)
> : m_eventType(eventType)
> , m_timer(*this, &EventSender::timerFired)
> {
>diff --git a/Source/WebCore/dom/EventTarget.cpp b/Source/WebCore/dom/EventTarget.cpp
>index b89394bae9adaad485cb30582d432410020f30fa..9e471440c87ebfafa381057dd993bda2dff8da1a 100644
>--- a/Source/WebCore/dom/EventTarget.cpp
>+++ b/Source/WebCore/dom/EventTarget.cpp
>@@ -68,7 +68,7 @@ bool EventTarget::isPaymentRequest() const
> return false;
> }
> 
>-bool EventTarget::addEventListener(const AtomicString& eventType, Ref<EventListener>&& listener, const AddEventListenerOptions& options)
>+bool EventTarget::addEventListener(const AtomString& eventType, Ref<EventListener>&& listener, const AddEventListenerOptions& options)
> {
> #if !ASSERT_DISABLED
> listener->checkValidityForEventTarget(*this);
>@@ -100,7 +100,7 @@ bool EventTarget::addEventListener(const AtomicString& eventType, Ref<EventListe
> return true;
> }
> 
>-void EventTarget::addEventListenerForBindings(const AtomicString& eventType, RefPtr<EventListener>&& listener, AddEventListenerOptionsOrBoolean&& variant)
>+void EventTarget::addEventListenerForBindings(const AtomString& eventType, RefPtr<EventListener>&& listener, AddEventListenerOptionsOrBoolean&& variant)
> {
> if (!listener)
> return;
>@@ -114,7 +114,7 @@ void EventTarget::addEventListenerForBindings(const AtomicString& eventType, Ref
> WTF::visit(visitor, variant);
> }
> 
>-void EventTarget::removeEventListenerForBindings(const AtomicString& eventType, RefPtr<EventListener>&& listener, ListenerOptionsOrBoolean&& variant)
>+void EventTarget::removeEventListenerForBindings(const AtomString& eventType, RefPtr<EventListener>&& listener, ListenerOptionsOrBoolean&& variant)
> {
> if (!listener)
> return;
>@@ -128,7 +128,7 @@ void EventTarget::removeEventListenerForBindings(const AtomicString& eventType,
> WTF::visit(visitor, variant);
> }
> 
>-bool EventTarget::removeEventListener(const AtomicString& eventType, EventListener& listener, const ListenerOptions& options)
>+bool EventTarget::removeEventListener(const AtomString& eventType, EventListener& listener, const ListenerOptions& options)
> {
> auto* data = eventTargetData();
> if (!data)
>@@ -139,7 +139,7 @@ bool EventTarget::removeEventListener(const AtomicString& eventType, EventListen
> return data->eventListenerMap.remove(eventType, listener, options.capture);
> }
> 
>-bool EventTarget::setAttributeEventListener(const AtomicString& eventType, RefPtr<EventListener>&& listener, DOMWrapperWorld& isolatedWorld)
>+bool EventTarget::setAttributeEventListener(const AtomString& eventType, RefPtr<EventListener>&& listener, DOMWrapperWorld& isolatedWorld)
> {
> auto* existingListener = attributeEventListener(eventType, isolatedWorld);
> if (!listener) {
>@@ -164,7 +164,7 @@ bool EventTarget::setAttributeEventListener(const AtomicString& eventType, RefPt
> return addEventListener(eventType, listener.releaseNonNull());
> }
> 
>-EventListener* EventTarget::attributeEventListener(const AtomicString& eventType, DOMWrapperWorld& isolatedWorld)
>+EventListener* EventTarget::attributeEventListener(const AtomString& eventType, DOMWrapperWorld& isolatedWorld)
> {
> for (auto& eventListener : eventListeners(eventType)) {
> auto& listener = eventListener->callback();
>@@ -179,7 +179,7 @@ EventListener* EventTarget::attributeEventListener(const AtomicString& eventType
> return nullptr;
> }
> 
>-bool EventTarget::hasActiveEventListeners(const AtomicString& eventType) const
>+bool EventTarget::hasActiveEventListeners(const AtomString& eventType) const
> {
> auto* data = eventTargetData();
> return data && data->eventListenerMap.containsActive(eventType);
>@@ -218,7 +218,7 @@ void EventTarget::uncaughtExceptionInEventHandler()
> {
> }
> 
>-static const AtomicString& legacyType(const Event& event)
>+static const AtomString& legacyType(const Event& event)
> {
> if (event.type() == eventNames().animationendEvent)
> return eventNames().webkitAnimationEndEvent;
>@@ -260,10 +260,10 @@ void EventTarget::fireEventListeners(Event& event, EventInvokePhase phase)
> if (!event.isTrusted())
> return;
> 
>- const AtomicString& legacyTypeName = legacyType(event);
>+ const AtomString& legacyTypeName = legacyType(event);
> if (!legacyTypeName.isNull()) {
> if (auto* legacyListenersVector = data->eventListenerMap.find(legacyTypeName)) {
>- AtomicString typeName = event.type();
>+ AtomString typeName = event.type();
> event.setType(legacyTypeName);
> innerInvokeEventListeners(event, *legacyListenersVector, phase);
> event.setType(typeName);
>@@ -326,14 +326,14 @@ void EventTarget::innerInvokeEventListeners(Event& event, EventListenerVector li
> InspectorInstrumentation::didDispatchEvent(willDispatchEventCookie, event.defaultPrevented());
> }
> 
>-Vector<AtomicString> EventTarget::eventTypes()
>+Vector<AtomString> EventTarget::eventTypes()
> {
> if (auto* data = eventTargetData())
> return data->eventListenerMap.eventTypes();
> return { };
> }
> 
>-const EventListenerVector& EventTarget::eventListeners(const AtomicString& eventType)
>+const EventListenerVector& EventTarget::eventListeners(const AtomString& eventType)
> {
> auto* data = eventTargetData();
> auto* listenerVector = data ? data->eventListenerMap.find(eventType) : nullptr;
>diff --git a/Source/WebCore/dom/EventTarget.h b/Source/WebCore/dom/EventTarget.h
>index 102337b53f9d68ee5d8db854730e857f354e1ee0..f82ae5248fade0ea3e8a75ffcc91f9dd58ab3695 100644
>--- a/Source/WebCore/dom/EventTarget.h
>+++ b/Source/WebCore/dom/EventTarget.h
>@@ -83,29 +83,29 @@ public:
> };
> 
> using AddEventListenerOptionsOrBoolean = Variant<AddEventListenerOptions, bool>;
>- WEBCORE_EXPORT void addEventListenerForBindings(const AtomicString& eventType, RefPtr<EventListener>&&, AddEventListenerOptionsOrBoolean&&);
>+ WEBCORE_EXPORT void addEventListenerForBindings(const AtomString& eventType, RefPtr<EventListener>&&, AddEventListenerOptionsOrBoolean&&);
> using ListenerOptionsOrBoolean = Variant<ListenerOptions, bool>;
>- WEBCORE_EXPORT void removeEventListenerForBindings(const AtomicString& eventType, RefPtr<EventListener>&&, ListenerOptionsOrBoolean&&);
>+ WEBCORE_EXPORT void removeEventListenerForBindings(const AtomString& eventType, RefPtr<EventListener>&&, ListenerOptionsOrBoolean&&);
> WEBCORE_EXPORT ExceptionOr<bool> dispatchEventForBindings(Event&);
> 
>- virtual bool addEventListener(const AtomicString& eventType, Ref<EventListener>&&, const AddEventListenerOptions& = { });
>- virtual bool removeEventListener(const AtomicString& eventType, EventListener&, const ListenerOptions&);
>+ virtual bool addEventListener(const AtomString& eventType, Ref<EventListener>&&, const AddEventListenerOptions& = { });
>+ virtual bool removeEventListener(const AtomString& eventType, EventListener&, const ListenerOptions&);
> 
> virtual void removeAllEventListeners();
> virtual void dispatchEvent(Event&);
> virtual void uncaughtExceptionInEventHandler();
> 
> // Used for legacy "onevent" attributes.
>- bool setAttributeEventListener(const AtomicString& eventType, RefPtr<EventListener>&&, DOMWrapperWorld&);
>- EventListener* attributeEventListener(const AtomicString& eventType, DOMWrapperWorld&);
>+ bool setAttributeEventListener(const AtomString& eventType, RefPtr<EventListener>&&, DOMWrapperWorld&);
>+ EventListener* attributeEventListener(const AtomString& eventType, DOMWrapperWorld&);
> 
> bool hasEventListeners() const;
>- bool hasEventListeners(const AtomicString& eventType) const;
>- bool hasCapturingEventListeners(const AtomicString& eventType);
>- bool hasActiveEventListeners(const AtomicString& eventType) const;
>+ bool hasEventListeners(const AtomString& eventType) const;
>+ bool hasCapturingEventListeners(const AtomString& eventType);
>+ bool hasActiveEventListeners(const AtomString& eventType) const;
> 
>- Vector<AtomicString> eventTypes();
>- const EventListenerVector& eventListeners(const AtomicString& eventType);
>+ Vector<AtomString> eventTypes();
>+ const EventListenerVector& eventListeners(const AtomString& eventType);
> 
> enum class EventInvokePhase { Capturing, Bubbling };
> void fireEventListeners(Event&, EventInvokePhase);
>@@ -158,13 +158,13 @@ inline bool EventTarget::hasEventListeners() const
> return data && !data->eventListenerMap.isEmpty();
> }
> 
>-inline bool EventTarget::hasEventListeners(const AtomicString& eventType) const
>+inline bool EventTarget::hasEventListeners(const AtomString& eventType) const
> {
> auto* data = eventTargetData();
> return data && data->eventListenerMap.contains(eventType);
> }
> 
>-inline bool EventTarget::hasCapturingEventListeners(const AtomicString& eventType)
>+inline bool EventTarget::hasCapturingEventListeners(const AtomString& eventType)
> {
> auto* data = eventTargetData();
> return data && data->eventListenerMap.containsCapturing(eventType);
>diff --git a/Source/WebCore/dom/EventTarget.idl b/Source/WebCore/dom/EventTarget.idl
>index 0f91ef324a66c02dbb019ad54216aa13b6b2b14b..e5f179d51d1f59567e14d9b5c79e8515b3c850fc 100644
>--- a/Source/WebCore/dom/EventTarget.idl
>+++ b/Source/WebCore/dom/EventTarget.idl
>@@ -26,8 +26,8 @@
> JSCustomMarkFunction,
> JSCustomToNativeObject,
> ] interface EventTarget {
>- [ImplementedAs=addEventListenerForBindings] void addEventListener([AtomicString] DOMString type, EventListener? callback, optional (AddEventListenerOptions or boolean) options = false);
>- [ImplementedAs=removeEventListenerForBindings] void removeEventListener([AtomicString] DOMString type, EventListener? callback, optional (EventListenerOptions or boolean) options = false);
>+ [ImplementedAs=addEventListenerForBindings] void addEventListener([AtomString] DOMString type, EventListener? callback, optional (AddEventListenerOptions or boolean) options = false);
>+ [ImplementedAs=removeEventListenerForBindings] void removeEventListener([AtomString] DOMString type, EventListener? callback, optional (EventListenerOptions or boolean) options = false);
> [ImplementedAs=dispatchEventForBindings, MayThrowException] boolean dispatchEvent(Event event);
> };
> 
>diff --git a/Source/WebCore/dom/FocusEvent.cpp b/Source/WebCore/dom/FocusEvent.cpp
>index 826361549c2e3b030cc8f9d633e954417b7898c5..6b219a4a824eb5145844da5e5e28429ac526243e 100644
>--- a/Source/WebCore/dom/FocusEvent.cpp
>+++ b/Source/WebCore/dom/FocusEvent.cpp
>@@ -40,13 +40,13 @@ bool FocusEvent::isFocusEvent() const
> return true;
> }
> 
>-FocusEvent::FocusEvent(const AtomicString& type, CanBubble canBubble, IsCancelable isCancelable, RefPtr<WindowProxy>&& view, int detail, RefPtr<EventTarget>&& relatedTarget)
>+FocusEvent::FocusEvent(const AtomString& type, CanBubble canBubble, IsCancelable isCancelable, RefPtr<WindowProxy>&& view, int detail, RefPtr<EventTarget>&& relatedTarget)
> : UIEvent(type, canBubble, isCancelable, IsComposed::Yes, WTFMove(view), detail)
> , m_relatedTarget(WTFMove(relatedTarget))
> {
> }
> 
>-FocusEvent::FocusEvent(const AtomicString& type, const Init& initializer)
>+FocusEvent::FocusEvent(const AtomString& type, const Init& initializer)
> : UIEvent(type, initializer)
> , m_relatedTarget(initializer.relatedTarget)
> {
>diff --git a/Source/WebCore/dom/FocusEvent.h b/Source/WebCore/dom/FocusEvent.h
>index 867a008d5ca3b7e9d9ec537e1320bbaeef361526..e73ab40f4ae675ddf4045822c96a4001b2b72ae1 100644
>--- a/Source/WebCore/dom/FocusEvent.h
>+++ b/Source/WebCore/dom/FocusEvent.h
>@@ -35,7 +35,7 @@ class Node;
> 
> class FocusEvent final : public UIEvent {
> public:
>- static Ref<FocusEvent> create(const AtomicString& type, CanBubble canBubble, IsCancelable cancelable, RefPtr<WindowProxy>&& view, int detail, RefPtr<EventTarget>&& relatedTarget)
>+ static Ref<FocusEvent> create(const AtomString& type, CanBubble canBubble, IsCancelable cancelable, RefPtr<WindowProxy>&& view, int detail, RefPtr<EventTarget>&& relatedTarget)
> {
> return adoptRef(*new FocusEvent(type, canBubble, cancelable, WTFMove(view), detail, WTFMove(relatedTarget)));
> }
>@@ -49,7 +49,7 @@ public:
> RefPtr<EventTarget> relatedTarget;
> };
> 
>- static Ref<FocusEvent> create(const AtomicString& type, const Init& initializer)
>+ static Ref<FocusEvent> create(const AtomString& type, const Init& initializer)
> {
> return adoptRef(*new FocusEvent(type, initializer));
> }
>@@ -58,8 +58,8 @@ public:
> 
> private:
> FocusEvent() = default;
>- FocusEvent(const AtomicString& type, CanBubble, IsCancelable, RefPtr<WindowProxy>&&, int, RefPtr<EventTarget>&&);
>- FocusEvent(const AtomicString& type, const Init&);
>+ FocusEvent(const AtomString& type, CanBubble, IsCancelable, RefPtr<WindowProxy>&&, int, RefPtr<EventTarget>&&);
>+ FocusEvent(const AtomString& type, const Init&);
> 
> EventInterface eventInterface() const final;
> bool isFocusEvent() const final;
>diff --git a/Source/WebCore/dom/FullscreenManager.cpp b/Source/WebCore/dom/FullscreenManager.cpp
>index 6f92c905028f9162b8c05d751d3844c7199d4a97..830a1cb24556146c522df782014986f2d3693aa3 100644
>--- a/Source/WebCore/dom/FullscreenManager.cpp
>+++ b/Source/WebCore/dom/FullscreenManager.cpp
>@@ -458,7 +458,7 @@ void FullscreenManager::dispatchFullscreenChangeEvents()
> dispatchFullscreenChangeOrErrorEvent(errorQueue, eventNames().webkitfullscreenerrorEvent, /* shouldNotifyMediaElement */ false);
> }
> 
>-void FullscreenManager::dispatchFullscreenChangeOrErrorEvent(Deque<RefPtr<Node>>& queue, const AtomicString& eventName, bool shouldNotifyMediaElement)
>+void FullscreenManager::dispatchFullscreenChangeOrErrorEvent(Deque<RefPtr<Node>>& queue, const AtomString& eventName, bool shouldNotifyMediaElement)
> {
> while (!queue.isEmpty()) {
> RefPtr<Node> node = queue.takeFirst();
>diff --git a/Source/WebCore/dom/FullscreenManager.h b/Source/WebCore/dom/FullscreenManager.h
>index ebdaa95d8cdfde42b8029f7aa434a19932349c06..edd9ca28ea493ac7c94c8bde285b1666c3882559 100644
>--- a/Source/WebCore/dom/FullscreenManager.h
>+++ b/Source/WebCore/dom/FullscreenManager.h
>@@ -99,7 +99,7 @@ public:
> protected:
> friend class Document;
> 
>- void dispatchFullscreenChangeOrErrorEvent(Deque<RefPtr<Node>>&, const AtomicString& eventName, bool shouldNotifyMediaElement);
>+ void dispatchFullscreenChangeOrErrorEvent(Deque<RefPtr<Node>>&, const AtomString& eventName, bool shouldNotifyMediaElement);
> void clearFullscreenElementStack();
> void popFullscreenElementStack();
> void pushFullscreenElementStack(Element&);
>diff --git a/Source/WebCore/dom/GenericEventQueue.cpp b/Source/WebCore/dom/GenericEventQueue.cpp
>index 8cfa8f04cb12f0ce1ff46542be622a474130aae0..7a08482e77cc403d2f09ee44b3acde7037237e5f 100644
>--- a/Source/WebCore/dom/GenericEventQueue.cpp
>+++ b/Source/WebCore/dom/GenericEventQueue.cpp
>@@ -92,7 +92,7 @@ bool GenericEventQueue::hasPendingEvents() const
> return !m_pendingEvents.isEmpty();
> }
> 
>-bool GenericEventQueue::hasPendingEventsOfType(const AtomicString& type) const
>+bool GenericEventQueue::hasPendingEventsOfType(const AtomString& type) const
> {
> for (auto& event : m_pendingEvents) {
> if (event->type() == type)
>diff --git a/Source/WebCore/dom/GenericEventQueue.h b/Source/WebCore/dom/GenericEventQueue.h
>index e498cfa377adf156c375741e86b51bf1398dca6e..b7b659f32e0aa5b6c8917b42713b5c53dae36b8e 100644
>--- a/Source/WebCore/dom/GenericEventQueue.h
>+++ b/Source/WebCore/dom/GenericEventQueue.h
>@@ -47,7 +47,7 @@ public:
> 
> void cancelAllEvents();
> bool hasPendingEvents() const;
>- bool hasPendingEventsOfType(const AtomicString&) const;
>+ bool hasPendingEventsOfType(const AtomString&) const;
> 
> void suspend();
> void resume();
>diff --git a/Source/WebCore/dom/HashChangeEvent.h b/Source/WebCore/dom/HashChangeEvent.h
>index c81375eb867f20117caaaf449f135b0c3aaf9792..81a6b477e606139be0c13ee22a76fded4fb44d39 100644
>--- a/Source/WebCore/dom/HashChangeEvent.h
>+++ b/Source/WebCore/dom/HashChangeEvent.h
>@@ -42,12 +42,12 @@ public:
> String newURL;
> };
> 
>- static Ref<HashChangeEvent> create(const AtomicString& type, const Init& initializer, IsTrusted isTrusted = IsTrusted::No)
>+ static Ref<HashChangeEvent> create(const AtomString& type, const Init& initializer, IsTrusted isTrusted = IsTrusted::No)
> {
> return adoptRef(*new HashChangeEvent(type, initializer, isTrusted));
> }
> 
>- void initHashChangeEvent(const AtomicString& eventType, bool canBubble, bool cancelable, const String& oldURL, const String& newURL)
>+ void initHashChangeEvent(const AtomString& eventType, bool canBubble, bool cancelable, const String& oldURL, const String& newURL)
> {
> if (isBeingDispatched())
> return;
>@@ -75,7 +75,7 @@ private:
> {
> }
> 
>- HashChangeEvent(const AtomicString& type, const Init& initializer, IsTrusted isTrusted)
>+ HashChangeEvent(const AtomString& type, const Init& initializer, IsTrusted isTrusted)
> : Event(type, initializer, isTrusted)
> , m_oldURL(initializer.oldURL)
> , m_newURL(initializer.newURL)
>diff --git a/Source/WebCore/dom/IdTargetObserver.cpp b/Source/WebCore/dom/IdTargetObserver.cpp
>index afadd38f90814c991603c0e225ce90d88cac4125..e2730d1cfb5e9ffa9cfe837ffebc8c5046e72a11 100644
>--- a/Source/WebCore/dom/IdTargetObserver.cpp
>+++ b/Source/WebCore/dom/IdTargetObserver.cpp
>@@ -30,7 +30,7 @@
> 
> namespace WebCore {
> 
>-IdTargetObserver::IdTargetObserver(IdTargetObserverRegistry& registry, const AtomicString& id)
>+IdTargetObserver::IdTargetObserver(IdTargetObserverRegistry& registry, const AtomString& id)
> : m_registry(&registry)
> , m_id(id)
> {
>diff --git a/Source/WebCore/dom/IdTargetObserver.h b/Source/WebCore/dom/IdTargetObserver.h
>index 2e26bf276ab7d1811a0f1eab9fce702d64b029a9..4406b6375a70f7f30813bc444f6f499d801f6b89 100644
>--- a/Source/WebCore/dom/IdTargetObserver.h
>+++ b/Source/WebCore/dom/IdTargetObserver.h
>@@ -25,7 +25,7 @@
> 
> #pragma once
> 
>-#include <wtf/text/AtomicString.h>
>+#include <wtf/text/AtomString.h>
> 
> namespace WebCore {
> 
>@@ -37,11 +37,11 @@ public:
> virtual void idTargetChanged() = 0;
> 
> protected:
>- IdTargetObserver(IdTargetObserverRegistry&, const AtomicString& id);
>+ IdTargetObserver(IdTargetObserverRegistry&, const AtomString& id);
> 
> private:
> IdTargetObserverRegistry* m_registry;
>- AtomicString m_id;
>+ AtomString m_id;
> };
> 
> } // namespace WebCore
>diff --git a/Source/WebCore/dom/IdTargetObserverRegistry.cpp b/Source/WebCore/dom/IdTargetObserverRegistry.cpp
>index f711b40a29cda5bdd5efe51b6acb638d63047316..b3a06e47b0700f7c47d3d9aef33f443724e0c55e 100644
>--- a/Source/WebCore/dom/IdTargetObserverRegistry.cpp
>+++ b/Source/WebCore/dom/IdTargetObserverRegistry.cpp
>@@ -30,7 +30,7 @@
> 
> namespace WebCore {
> 
>-void IdTargetObserverRegistry::addObserver(const AtomicString& id, IdTargetObserver* observer)
>+void IdTargetObserverRegistry::addObserver(const AtomString& id, IdTargetObserver* observer)
> {
> if (id.isEmpty())
> return;
>@@ -42,7 +42,7 @@ void IdTargetObserverRegistry::addObserver(const AtomicString& id, IdTargetObser
> result.iterator->value->add(observer);
> }
> 
>-void IdTargetObserverRegistry::removeObserver(const AtomicString& id, IdTargetObserver* observer)
>+void IdTargetObserverRegistry::removeObserver(const AtomString& id, IdTargetObserver* observer)
> {
> if (id.isEmpty() || m_registry.isEmpty())
> return;
>@@ -55,7 +55,7 @@ void IdTargetObserverRegistry::removeObserver(const AtomicString& id, IdTargetOb
> m_registry.remove(iter);
> }
> 
>-void IdTargetObserverRegistry::notifyObserversInternal(const AtomicStringImpl& id)
>+void IdTargetObserverRegistry::notifyObserversInternal(const AtomStringImpl& id)
> {
> ASSERT(!m_registry.isEmpty());
> 
>diff --git a/Source/WebCore/dom/IdTargetObserverRegistry.h b/Source/WebCore/dom/IdTargetObserverRegistry.h
>index edac13dd6c342a7ea0d322a86b188c45b6081a8c..a1e63ace13f3033c431a889f7a6d20d59aa7cf2a 100644
>--- a/Source/WebCore/dom/IdTargetObserverRegistry.h
>+++ b/Source/WebCore/dom/IdTargetObserverRegistry.h
>@@ -29,7 +29,7 @@
> #include <wtf/Forward.h>
> #include <wtf/HashMap.h>
> #include <wtf/HashSet.h>
>-#include <wtf/text/AtomicString.h>
>+#include <wtf/text/AtomString.h>
> 
> namespace WebCore {
> 
>@@ -41,27 +41,27 @@ class IdTargetObserverRegistry {
> public:
> IdTargetObserverRegistry() { }
> 
>- void notifyObservers(const AtomicString& id);
>- void notifyObservers(const AtomicStringImpl& id);
>+ void notifyObservers(const AtomString& id);
>+ void notifyObservers(const AtomStringImpl& id);
> 
> private:
>- void addObserver(const AtomicString& id, IdTargetObserver*);
>- void removeObserver(const AtomicString& id, IdTargetObserver*);
>- void notifyObserversInternal(const AtomicStringImpl& id);
>+ void addObserver(const AtomString& id, IdTargetObserver*);
>+ void removeObserver(const AtomString& id, IdTargetObserver*);
>+ void notifyObserversInternal(const AtomStringImpl& id);
> 
> typedef HashSet<IdTargetObserver*> ObserverSet;
>- typedef HashMap<const AtomicStringImpl*, std::unique_ptr<ObserverSet>> IdToObserverSetMap;
>+ typedef HashMap<const AtomStringImpl*, std::unique_ptr<ObserverSet>> IdToObserverSetMap;
> IdToObserverSetMap m_registry;
> ObserverSet* m_notifyingObserversInSet { nullptr };
> };
> 
>-inline void IdTargetObserverRegistry::notifyObservers(const AtomicString& id)
>+inline void IdTargetObserverRegistry::notifyObservers(const AtomString& id)
> {
> if (!id.isEmpty())
> return notifyObservers(*id.impl());
> }
> 
>-inline void IdTargetObserverRegistry::notifyObservers(const AtomicStringImpl& id)
>+inline void IdTargetObserverRegistry::notifyObservers(const AtomStringImpl& id)
> {
> ASSERT(!m_notifyingObserversInSet);
> ASSERT(id.length());
>diff --git a/Source/WebCore/dom/InlineClassicScript.h b/Source/WebCore/dom/InlineClassicScript.h
>index 9fa9f31f4e3f6bd67975ca616a4c2e70c7ad228b..ad4b850f1af670db780cab7f795bb20c04dc552e 100644
>--- a/Source/WebCore/dom/InlineClassicScript.h
>+++ b/Source/WebCore/dom/InlineClassicScript.h
>@@ -39,7 +39,7 @@ public:
> bool isModuleScript() const final { return false; }
> 
> private:
>- InlineClassicScript(const String& nonce, const String& crossOriginMode, const String& charset, const AtomicString& initiatorName, bool isInUserAgentShadowTree)
>+ InlineClassicScript(const String& nonce, const String& crossOriginMode, const String& charset, const AtomString& initiatorName, bool isInUserAgentShadowTree)
> : ScriptElementCachedScriptFetcher(nonce, crossOriginMode, charset, initiatorName, isInUserAgentShadowTree)
> {
> }
>diff --git a/Source/WebCore/dom/InlineStyleSheetOwner.cpp b/Source/WebCore/dom/InlineStyleSheetOwner.cpp
>index 150a78d590316c7e14419d82acb79b804c62b8af..3b12ca45aa84ec2d85958dac8afeaaa13fcb9faa 100644
>--- a/Source/WebCore/dom/InlineStyleSheetOwner.cpp
>+++ b/Source/WebCore/dom/InlineStyleSheetOwner.cpp
>@@ -142,14 +142,14 @@ void InlineStyleSheetOwner::clearSheet()
> sheet->clearOwnerNode();
> }
> 
>-inline bool isValidCSSContentType(Element& element, const AtomicString& type)
>+inline bool isValidCSSContentType(Element& element, const AtomString& type)
> {
> if (type.isEmpty())
> return true;
> // FIXME: Should MIME types really be case sensitive in XML documents? Doesn't seem like they should,
> // even though other things are case sensitive in that context. MIME types should never be case sensitive.
> // We should verify this and then remove the isHTMLElement check here.
>- static NeverDestroyed<const AtomicString> cssContentType("text/css", AtomicString::ConstructFromLiteral);
>+ static NeverDestroyed<const AtomString> cssContentType("text/css", AtomString::ConstructFromLiteral);
> return element.isHTMLElement() ? equalLettersIgnoringASCIICase(type, "text/css") : type == cssContentType;
> }
> 
>diff --git a/Source/WebCore/dom/InlineStyleSheetOwner.h b/Source/WebCore/dom/InlineStyleSheetOwner.h
>index 06fae80d1f04a5213d626c9387bf20fbad808d8e..4ba0fa9cb88c4eb8bd3ff13df76a87f907a03dff 100644
>--- a/Source/WebCore/dom/InlineStyleSheetOwner.h
>+++ b/Source/WebCore/dom/InlineStyleSheetOwner.h
>@@ -34,8 +34,8 @@ public:
> InlineStyleSheetOwner(Document&, bool createdByParser);
> ~InlineStyleSheetOwner();
> 
>- void setContentType(const AtomicString& contentType) { m_contentType = contentType; }
>- void setMedia(const AtomicString& media) { m_media = media; }
>+ void setContentType(const AtomString& contentType) { m_contentType = contentType; }
>+ void setMedia(const AtomString& media) { m_media = media; }
> 
> CSSStyleSheet* sheet() const { return m_sheet.get(); }
> 
>@@ -61,8 +61,8 @@ private:
> bool m_isParsingChildren;
> bool m_loading;
> WTF::TextPosition m_startTextPosition;
>- AtomicString m_contentType;
>- AtomicString m_media;
>+ AtomString m_contentType;
>+ AtomString m_media;
> RefPtr<CSSStyleSheet> m_sheet;
> Style::Scope* m_styleScope { nullptr };
> };
>diff --git a/Source/WebCore/dom/InputEvent.cpp b/Source/WebCore/dom/InputEvent.cpp
>index 040e5d5f268525b755b0102d06929a1e090d2015..0e9aeee762a7b6f42b688e4332f192f8194d29b1 100644
>--- a/Source/WebCore/dom/InputEvent.cpp
>+++ b/Source/WebCore/dom/InputEvent.cpp
>@@ -33,12 +33,12 @@
> 
> namespace WebCore {
> 
>-Ref<InputEvent> InputEvent::create(const AtomicString& eventType, const String& inputType, IsCancelable cancelable, RefPtr<WindowProxy>&& view, const String& data, RefPtr<DataTransfer>&& dataTransfer, const Vector<RefPtr<StaticRange>>& targetRanges, int detail)
>+Ref<InputEvent> InputEvent::create(const AtomString& eventType, const String& inputType, IsCancelable cancelable, RefPtr<WindowProxy>&& view, const String& data, RefPtr<DataTransfer>&& dataTransfer, const Vector<RefPtr<StaticRange>>& targetRanges, int detail)
> {
> return adoptRef(*new InputEvent(eventType, inputType, cancelable, WTFMove(view), data, WTFMove(dataTransfer), targetRanges, detail));
> }
> 
>-InputEvent::InputEvent(const AtomicString& eventType, const String& inputType, IsCancelable cancelable, RefPtr<WindowProxy>&& view, const String& data, RefPtr<DataTransfer>&& dataTransfer, const Vector<RefPtr<StaticRange>>& targetRanges, int detail)
>+InputEvent::InputEvent(const AtomString& eventType, const String& inputType, IsCancelable cancelable, RefPtr<WindowProxy>&& view, const String& data, RefPtr<DataTransfer>&& dataTransfer, const Vector<RefPtr<StaticRange>>& targetRanges, int detail)
> : UIEvent(eventType, CanBubble::Yes, cancelable, IsComposed::Yes, WTFMove(view), detail)
> , m_inputType(inputType)
> , m_data(data)
>@@ -47,7 +47,7 @@ InputEvent::InputEvent(const AtomicString& eventType, const String& inputType, I
> {
> }
> 
>-InputEvent::InputEvent(const AtomicString& eventType, const Init& initializer)
>+InputEvent::InputEvent(const AtomString& eventType, const Init& initializer)
> : UIEvent(eventType, initializer)
> , m_inputType(emptyString())
> , m_data(initializer.data)
>diff --git a/Source/WebCore/dom/InputEvent.h b/Source/WebCore/dom/InputEvent.h
>index b333bfe90af219d2597dabe36383cd96ab6b8e51..3e708a3c579a03ce4977b7a696e54d98c28f0c00 100644
>--- a/Source/WebCore/dom/InputEvent.h
>+++ b/Source/WebCore/dom/InputEvent.h
>@@ -39,10 +39,10 @@ public:
> String data;
> };
> 
>- static Ref<InputEvent> create(const AtomicString& eventType, const String& inputType, IsCancelable, RefPtr<WindowProxy>&& view,
>+ static Ref<InputEvent> create(const AtomString& eventType, const String& inputType, IsCancelable, RefPtr<WindowProxy>&& view,
> const String& data, RefPtr<DataTransfer>&&, const Vector<RefPtr<StaticRange>>& targetRanges, int detail);
> 
>- static Ref<InputEvent> create(const AtomicString& type, const Init& initializer)
>+ static Ref<InputEvent> create(const AtomString& type, const Init& initializer)
> {
> return adoptRef(*new InputEvent(type, initializer));
> }
>@@ -55,8 +55,8 @@ public:
> const Vector<RefPtr<StaticRange>>& getTargetRanges() { return m_targetRanges; }
> 
> private:
>- InputEvent(const AtomicString& eventType, const String& inputType, IsCancelable, RefPtr<WindowProxy>&&, const String& data, RefPtr<DataTransfer>&&, const Vector<RefPtr<StaticRange>>& targetRanges, int detail);
>- InputEvent(const AtomicString& eventType, const Init&);
>+ InputEvent(const AtomString& eventType, const String& inputType, IsCancelable, RefPtr<WindowProxy>&&, const String& data, RefPtr<DataTransfer>&&, const Vector<RefPtr<StaticRange>>& targetRanges, int detail);
>+ InputEvent(const AtomString& eventType, const Init&);
> 
> String m_inputType;
> String m_data;
>diff --git a/Source/WebCore/dom/KeyboardEvent.cpp b/Source/WebCore/dom/KeyboardEvent.cpp
>index 4ec6c9e9251e198317c305d678c3a482c6bcfb5d..7e7a34797b8629f62f7f786ab14c5c6f5bd90b14 100644
>--- a/Source/WebCore/dom/KeyboardEvent.cpp
>+++ b/Source/WebCore/dom/KeyboardEvent.cpp
>@@ -34,7 +34,7 @@
> 
> namespace WebCore {
> 
>-static inline const AtomicString& eventTypeForKeyboardEventType(PlatformEvent::Type type)
>+static inline const AtomString& eventTypeForKeyboardEventType(PlatformEvent::Type type)
> {
> switch (type) {
> case PlatformEvent::KeyUp:
>@@ -116,7 +116,7 @@ inline KeyboardEvent::KeyboardEvent(const PlatformKeyboardEvent& key, RefPtr<Win
> {
> }
> 
>-inline KeyboardEvent::KeyboardEvent(const AtomicString& eventType, const Init& initializer)
>+inline KeyboardEvent::KeyboardEvent(const AtomString& eventType, const Init& initializer)
> : UIEventWithKeyState(eventType, initializer)
> #if ENABLE(KEYBOARD_KEY_ATTRIBUTE)
> , m_key(initializer.key)
>@@ -146,12 +146,12 @@ Ref<KeyboardEvent> KeyboardEvent::createForBindings()
> return adoptRef(*new KeyboardEvent);
> }
> 
>-Ref<KeyboardEvent> KeyboardEvent::create(const AtomicString& type, const Init& initializer)
>+Ref<KeyboardEvent> KeyboardEvent::create(const AtomString& type, const Init& initializer)
> {
> return adoptRef(*new KeyboardEvent(type, initializer));
> }
> 
>-void KeyboardEvent::initKeyboardEvent(const AtomicString& type, bool canBubble, bool cancelable, RefPtr<WindowProxy>&& view,
>+void KeyboardEvent::initKeyboardEvent(const AtomString& type, bool canBubble, bool cancelable, RefPtr<WindowProxy>&& view,
> const String& keyIdentifier, unsigned location, bool ctrlKey, bool altKey, bool shiftKey, bool metaKey, bool altGraphKey)
> {
> if (isBeingDispatched())
>diff --git a/Source/WebCore/dom/KeyboardEvent.h b/Source/WebCore/dom/KeyboardEvent.h
>index b7340b304fb8785f09c385c2724165822a56ce84..e256e8b0fd84468e24430660fa483642f74c3cf9 100644
>--- a/Source/WebCore/dom/KeyboardEvent.h
>+++ b/Source/WebCore/dom/KeyboardEvent.h
>@@ -61,11 +61,11 @@ public:
> unsigned which;
> };
> 
>- static Ref<KeyboardEvent> create(const AtomicString& type, const Init&);
>+ static Ref<KeyboardEvent> create(const AtomString& type, const Init&);
> 
> virtual ~KeyboardEvent();
> 
>- WEBCORE_EXPORT void initKeyboardEvent(const AtomicString& type, bool canBubble, bool cancelable, RefPtr<WindowProxy>&&,
>+ WEBCORE_EXPORT void initKeyboardEvent(const AtomString& type, bool canBubble, bool cancelable, RefPtr<WindowProxy>&&,
> const String& keyIdentifier, unsigned location,
> bool ctrlKey, bool altKey, bool shiftKey, bool metaKey, bool altGraphKey = false);
> 
>@@ -101,7 +101,7 @@ public:
> private:
> KeyboardEvent();
> KeyboardEvent(const PlatformKeyboardEvent&, RefPtr<WindowProxy>&&);
>- KeyboardEvent(const AtomicString&, const Init&);
>+ KeyboardEvent(const AtomString&, const Init&);
> 
> std::unique_ptr<PlatformKeyboardEvent> m_underlyingPlatformEvent;
> #if ENABLE(KEYBOARD_KEY_ATTRIBUTE)
>diff --git a/Source/WebCore/dom/LoadableClassicScript.cpp b/Source/WebCore/dom/LoadableClassicScript.cpp
>index d927e95be269a25ae4336a74b00027c1758fe48a..739dbf4d9a2c5293fe97728f654fe8c74b62ec58 100644
>--- a/Source/WebCore/dom/LoadableClassicScript.cpp
>+++ b/Source/WebCore/dom/LoadableClassicScript.cpp
>@@ -35,7 +35,7 @@
> 
> namespace WebCore {
> 
>-Ref<LoadableClassicScript> LoadableClassicScript::create(const String& nonce, const String& integrityMetadata, const String& crossOriginMode, const String& charset, const AtomicString& initiatorName, bool isInUserAgentShadowTree)
>+Ref<LoadableClassicScript> LoadableClassicScript::create(const String& nonce, const String& integrityMetadata, const String& crossOriginMode, const String& charset, const AtomString& initiatorName, bool isInUserAgentShadowTree)
> {
> return adoptRef(*new LoadableClassicScript(nonce, integrityMetadata, crossOriginMode, charset, initiatorName, isInUserAgentShadowTree));
> }
>diff --git a/Source/WebCore/dom/LoadableClassicScript.h b/Source/WebCore/dom/LoadableClassicScript.h
>index 067644a47d1f9d902b4e196aaeffa8a6f95d4f0f..381b5a18bd15e0a89265168040fbfdd045962ded 100644
>--- a/Source/WebCore/dom/LoadableClassicScript.h
>+++ b/Source/WebCore/dom/LoadableClassicScript.h
>@@ -40,7 +40,7 @@ class LoadableClassicScript final : public LoadableScript, private CachedResourc
> public:
> virtual ~LoadableClassicScript();
> 
>- static Ref<LoadableClassicScript> create(const String& nonce, const String& integrity, const String& crossOriginMode, const String& charset, const AtomicString& initiatorName, bool isInUserAgentShadowTree);
>+ static Ref<LoadableClassicScript> create(const String& nonce, const String& integrity, const String& crossOriginMode, const String& charset, const AtomString& initiatorName, bool isInUserAgentShadowTree);
> bool isLoaded() const final;
> Optional<Error> error() const final;
> bool wasCanceled() const final;
>@@ -55,7 +55,7 @@ public:
> bool load(Document&, const URL&);
> 
> private:
>- LoadableClassicScript(const String& nonce, const String& integrity, const String& crossOriginMode, const String& charset, const AtomicString& initiatorName, bool isInUserAgentShadowTree)
>+ LoadableClassicScript(const String& nonce, const String& integrity, const String& crossOriginMode, const String& charset, const AtomString& initiatorName, bool isInUserAgentShadowTree)
> : LoadableScript(nonce, crossOriginMode, charset, initiatorName, isInUserAgentShadowTree)
> , m_integrity(integrity)
> {
>diff --git a/Source/WebCore/dom/LoadableModuleScript.cpp b/Source/WebCore/dom/LoadableModuleScript.cpp
>index 322cd3a7392c9bf0e4570d571275daa367748e21..db94fe4ee5d525ce15ed1fc710394c2cf25223a6 100644
>--- a/Source/WebCore/dom/LoadableModuleScript.cpp
>+++ b/Source/WebCore/dom/LoadableModuleScript.cpp
>@@ -34,12 +34,12 @@
> 
> namespace WebCore {
> 
>-Ref<LoadableModuleScript> LoadableModuleScript::create(const String& nonce, const String& integrity, const String& crossOriginMode, const String& charset, const AtomicString& initiatorName, bool isInUserAgentShadowTree)
>+Ref<LoadableModuleScript> LoadableModuleScript::create(const String& nonce, const String& integrity, const String& crossOriginMode, const String& charset, const AtomString& initiatorName, bool isInUserAgentShadowTree)
> {
> return adoptRef(*new LoadableModuleScript(nonce, integrity, crossOriginMode, charset, initiatorName, isInUserAgentShadowTree));
> }
> 
>-LoadableModuleScript::LoadableModuleScript(const String& nonce, const String& integrity, const String& crossOriginMode, const String& charset, const AtomicString& initiatorName, bool isInUserAgentShadowTree)
>+LoadableModuleScript::LoadableModuleScript(const String& nonce, const String& integrity, const String& crossOriginMode, const String& charset, const AtomString& initiatorName, bool isInUserAgentShadowTree)
> : LoadableScript(nonce, crossOriginMode, charset, initiatorName, isInUserAgentShadowTree)
> , m_parameters(ModuleFetchParameters::create(integrity))
> {
>diff --git a/Source/WebCore/dom/LoadableModuleScript.h b/Source/WebCore/dom/LoadableModuleScript.h
>index 173dca36aa174c3813182490d1aec6f6f7af64d5..90aa36709ae7a5fe2450426ba2b69934e1fe13ba 100644
>--- a/Source/WebCore/dom/LoadableModuleScript.h
>+++ b/Source/WebCore/dom/LoadableModuleScript.h
>@@ -37,7 +37,7 @@ class LoadableModuleScript final : public LoadableScript {
> public:
> virtual ~LoadableModuleScript();
> 
>- static Ref<LoadableModuleScript> create(const String& nonce, const String& integrity, const String& crossOriginMode, const String& charset, const AtomicString& initiatorName, bool isInUserAgentShadowTree);
>+ static Ref<LoadableModuleScript> create(const String& nonce, const String& integrity, const String& crossOriginMode, const String& charset, const AtomString& initiatorName, bool isInUserAgentShadowTree);
> 
> bool isLoaded() const final;
> Optional<Error> error() const final;
>@@ -60,7 +60,7 @@ public:
> UniquedStringImpl* moduleKey() const { return m_moduleKey.get(); }
> 
> private:
>- LoadableModuleScript(const String& nonce, const String& integrity, const String& crossOriginMode, const String& charset, const AtomicString& initiatorName, bool isInUserAgentShadowTree);
>+ LoadableModuleScript(const String& nonce, const String& integrity, const String& crossOriginMode, const String& charset, const AtomString& initiatorName, bool isInUserAgentShadowTree);
> 
> Ref<ModuleFetchParameters> m_parameters;
> RefPtr<UniquedStringImpl> m_moduleKey;
>diff --git a/Source/WebCore/dom/LoadableScript.h b/Source/WebCore/dom/LoadableScript.h
>index 670badf34d8caddd3e5a8ab106a1bc35c4826027..bfea29302dacb96b88e6ea62c583a78071ba57fc 100644
>--- a/Source/WebCore/dom/LoadableScript.h
>+++ b/Source/WebCore/dom/LoadableScript.h
>@@ -68,7 +68,7 @@ public:
> void removeClient(LoadableScriptClient&);
> 
> protected:
>- LoadableScript(const String& nonce, const String& crossOriginMode, const String& charset, const AtomicString& initiatorName, bool isInUserAgentShadowTree)
>+ LoadableScript(const String& nonce, const String& crossOriginMode, const String& charset, const AtomString& initiatorName, bool isInUserAgentShadowTree)
> : ScriptElementCachedScriptFetcher(nonce, crossOriginMode, charset, initiatorName, isInUserAgentShadowTree)
> {
> }
>diff --git a/Source/WebCore/dom/MessageEvent.cpp b/Source/WebCore/dom/MessageEvent.cpp
>index afb24e5b76bec8baead175f79d081111ccab0881..3e4786d889b3ac67166ab8697898e70afc24fbd5 100644
>--- a/Source/WebCore/dom/MessageEvent.cpp
>+++ b/Source/WebCore/dom/MessageEvent.cpp
>@@ -38,7 +38,7 @@ using namespace JSC;
> 
> MessageEvent::MessageEvent() = default;
> 
>-inline MessageEvent::MessageEvent(const AtomicString& type, Init&& initializer, IsTrusted isTrusted)
>+inline MessageEvent::MessageEvent(const AtomString& type, Init&& initializer, IsTrusted isTrusted)
> : Event(type, initializer, isTrusted)
> , m_data(JSValueInWrappedObject { initializer.data })
> , m_origin(initializer.origin)
>@@ -58,7 +58,7 @@ inline MessageEvent::MessageEvent(DataType&& data, const String& origin, const S
> {
> }
> 
>-inline MessageEvent::MessageEvent(const AtomicString& type, Ref<SerializedScriptValue>&& data, const String& origin, const String& lastEventId)
>+inline MessageEvent::MessageEvent(const AtomString& type, Ref<SerializedScriptValue>&& data, const String& origin, const String& lastEventId)
> : Event(type, CanBubble::No, IsCancelable::No)
> , m_data(WTFMove(data))
> , m_origin(origin)
>@@ -71,7 +71,7 @@ Ref<MessageEvent> MessageEvent::create(Vector<RefPtr<MessagePort>>&& ports, Ref<
> return adoptRef(*new MessageEvent(WTFMove(data), origin, lastEventId, WTFMove(source), WTFMove(ports)));
> }
> 
>-Ref<MessageEvent> MessageEvent::create(const AtomicString& type, Ref<SerializedScriptValue>&& data, const String& origin, const String& lastEventId)
>+Ref<MessageEvent> MessageEvent::create(const AtomString& type, Ref<SerializedScriptValue>&& data, const String& origin, const String& lastEventId)
> {
> return adoptRef(*new MessageEvent(type, WTFMove(data), origin, lastEventId));
> }
>@@ -96,14 +96,14 @@ Ref<MessageEvent> MessageEvent::createForBindings()
> return adoptRef(*new MessageEvent);
> }
> 
>-Ref<MessageEvent> MessageEvent::create(const AtomicString& type, Init&& initializer, IsTrusted isTrusted)
>+Ref<MessageEvent> MessageEvent::create(const AtomString& type, Init&& initializer, IsTrusted isTrusted)
> {
> return adoptRef(*new MessageEvent(type, WTFMove(initializer), isTrusted));
> }
> 
> MessageEvent::~MessageEvent() = default;
> 
>-void MessageEvent::initMessageEvent(const AtomicString& type, bool canBubble, bool cancelable, JSValue data, const String& origin, const String& lastEventId, Optional<MessageEventSource>&& source, Vector<RefPtr<MessagePort>>&& ports)
>+void MessageEvent::initMessageEvent(const AtomString& type, bool canBubble, bool cancelable, JSValue data, const String& origin, const String& lastEventId, Optional<MessageEventSource>&& source, Vector<RefPtr<MessagePort>>&& ports)
> {
> if (isBeingDispatched())
> return;
>diff --git a/Source/WebCore/dom/MessageEvent.h b/Source/WebCore/dom/MessageEvent.h
>index 9216968263260d51047fcf62683abad24547187d..148831a601c4729b06b1dc494302e85c5010f7fb 100644
>--- a/Source/WebCore/dom/MessageEvent.h
>+++ b/Source/WebCore/dom/MessageEvent.h
>@@ -48,7 +48,7 @@ using MessageEventSource = Variant<RefPtr<WindowProxy>, RefPtr<MessagePort>>;
> class MessageEvent final : public Event {
> public:
> static Ref<MessageEvent> create(Vector<RefPtr<MessagePort>>&&, Ref<SerializedScriptValue>&&, const String& origin = { }, const String& lastEventId = { }, Optional<MessageEventSource>&& source = WTF::nullopt);
>- static Ref<MessageEvent> create(const AtomicString& type, Ref<SerializedScriptValue>&&, const String& origin, const String& lastEventId);
>+ static Ref<MessageEvent> create(const AtomString& type, Ref<SerializedScriptValue>&&, const String& origin, const String& lastEventId);
> static Ref<MessageEvent> create(const String& data, const String& origin = { });
> static Ref<MessageEvent> create(Ref<Blob>&& data, const String& origin);
> static Ref<MessageEvent> create(Ref<ArrayBuffer>&& data, const String& origin = { });
>@@ -61,11 +61,11 @@ public:
> Optional<MessageEventSource> source;
> Vector<RefPtr<MessagePort>> ports;
> };
>- static Ref<MessageEvent> create(const AtomicString& type, Init&&, IsTrusted = IsTrusted::No);
>+ static Ref<MessageEvent> create(const AtomString& type, Init&&, IsTrusted = IsTrusted::No);
> 
> virtual ~MessageEvent();
> 
>- void initMessageEvent(const AtomicString& type, bool canBubble, bool cancelable, JSC::JSValue data, const String& origin, const String& lastEventId, Optional<MessageEventSource>&&, Vector<RefPtr<MessagePort>>&&);
>+ void initMessageEvent(const AtomString& type, bool canBubble, bool cancelable, JSC::JSValue data, const String& origin, const String& lastEventId, Optional<MessageEventSource>&&, Vector<RefPtr<MessagePort>>&&);
> 
> const String& origin() const { return m_origin; }
> const String& lastEventId() const { return m_lastEventId; }
>@@ -80,8 +80,8 @@ public:
> 
> private:
> MessageEvent();
>- MessageEvent(const AtomicString& type, Init&&, IsTrusted);
>- MessageEvent(const AtomicString& type, Ref<SerializedScriptValue>&& data, const String& origin, const String& lastEventId);
>+ MessageEvent(const AtomString& type, Init&&, IsTrusted);
>+ MessageEvent(const AtomString& type, Ref<SerializedScriptValue>&& data, const String& origin, const String& lastEventId);
> MessageEvent(DataType&&, const String& origin, const String& lastEventId = { }, Optional<MessageEventSource>&& = WTF::nullopt, Vector<RefPtr<MessagePort>>&& = { });
> 
> EventInterface eventInterface() const final;
>diff --git a/Source/WebCore/dom/MessagePort.cpp b/Source/WebCore/dom/MessagePort.cpp
>index a029b3d71e7e94604d8193c091540c3a41a27e03..adf1337d99bfef236da8372fdb52c7a34b5dec61 100644
>--- a/Source/WebCore/dom/MessagePort.cpp
>+++ b/Source/WebCore/dom/MessagePort.cpp
>@@ -401,7 +401,7 @@ Vector<RefPtr<MessagePort>> MessagePort::entanglePorts(ScriptExecutionContext& c
> return ports;
> }
> 
>-bool MessagePort::addEventListener(const AtomicString& eventType, Ref<EventListener>&& listener, const AddEventListenerOptions& options)
>+bool MessagePort::addEventListener(const AtomString& eventType, Ref<EventListener>&& listener, const AddEventListenerOptions& options)
> {
> if (eventType == eventNames().messageEvent) {
> if (listener->isAttribute())
>@@ -413,7 +413,7 @@ bool MessagePort::addEventListener(const AtomicString& eventType, Ref<EventListe
> return EventTargetWithInlineData::addEventListener(eventType, WTFMove(listener), options);
> }
> 
>-bool MessagePort::removeEventListener(const AtomicString& eventType, EventListener& listener, const ListenerOptions& options)
>+bool MessagePort::removeEventListener(const AtomString& eventType, EventListener& listener, const ListenerOptions& options)
> {
> auto result = EventTargetWithInlineData::removeEventListener(eventType, listener, options);
> 
>diff --git a/Source/WebCore/dom/MessagePort.h b/Source/WebCore/dom/MessagePort.h
>index ef272d3e5bd159db5eda3db0be1f20a1721f144b..8cfb62db0e63e57ca036ac4896e2d3ae9d43f0ad 100644
>--- a/Source/WebCore/dom/MessagePort.h
>+++ b/Source/WebCore/dom/MessagePort.h
>@@ -99,8 +99,8 @@ public:
> private:
> explicit MessagePort(ScriptExecutionContext&, const MessagePortIdentifier& local, const MessagePortIdentifier& remote);
> 
>- bool addEventListener(const AtomicString& eventType, Ref<EventListener>&&, const AddEventListenerOptions&) final;
>- bool removeEventListener(const AtomicString& eventType, EventListener&, const ListenerOptions&) final;
>+ bool addEventListener(const AtomString& eventType, Ref<EventListener>&&, const AddEventListenerOptions&) final;
>+ bool removeEventListener(const AtomString& eventType, EventListener&, const ListenerOptions&) final;
> 
> void disentangle();
> 
>diff --git a/Source/WebCore/dom/MouseEvent.cpp b/Source/WebCore/dom/MouseEvent.cpp
>index f2516f75ecdabf672025bb190904fdef247ab844..5cfafa4113183a52913be15bccad3193f58a40d3 100644
>--- a/Source/WebCore/dom/MouseEvent.cpp
>+++ b/Source/WebCore/dom/MouseEvent.cpp
>@@ -39,12 +39,12 @@ namespace WebCore {
> 
> using namespace JSC;
> 
>-Ref<MouseEvent> MouseEvent::create(const AtomicString& type, const MouseEventInit& initializer)
>+Ref<MouseEvent> MouseEvent::create(const AtomString& type, const MouseEventInit& initializer)
> {
> return adoptRef(*new MouseEvent(type, initializer));
> }
> 
>-Ref<MouseEvent> MouseEvent::create(const AtomicString& eventType, RefPtr<WindowProxy>&& view, const PlatformMouseEvent& event, int detail, Node* relatedTarget)
>+Ref<MouseEvent> MouseEvent::create(const AtomString& eventType, RefPtr<WindowProxy>&& view, const PlatformMouseEvent& event, int detail, Node* relatedTarget)
> {
> bool isMouseEnterOrLeave = eventType == eventNames().mouseenterEvent || eventType == eventNames().mouseleaveEvent;
> auto isCancelable = eventType != eventNames().mousemoveEvent && !isMouseEnterOrLeave ? IsCancelable::Yes : IsCancelable::No;
>@@ -61,7 +61,7 @@ Ref<MouseEvent> MouseEvent::create(const AtomicString& eventType, RefPtr<WindowP
> event.modifiers(), event.button(), event.buttons(), relatedTarget, event.force(), event.syntheticClickType());
> }
> 
>-Ref<MouseEvent> MouseEvent::create(const AtomicString& type, CanBubble canBubble, IsCancelable isCancelable, IsComposed isComposed, MonotonicTime timestamp, RefPtr<WindowProxy>&& view, int detail,
>+Ref<MouseEvent> MouseEvent::create(const AtomString& type, CanBubble canBubble, IsCancelable isCancelable, IsComposed isComposed, MonotonicTime timestamp, RefPtr<WindowProxy>&& view, int detail,
> const IntPoint& screenLocation, const IntPoint& windowLocation, const IntPoint& movementDelta, OptionSet<Modifier> modifiers, short button, unsigned short buttons,
> EventTarget* relatedTarget, double force, unsigned short syntheticClickType, DataTransfer* dataTransfer, IsSimulated isSimulated, IsTrusted isTrusted)
> {
>@@ -69,7 +69,7 @@ Ref<MouseEvent> MouseEvent::create(const AtomicString& type, CanBubble canBubble
> screenLocation, windowLocation, movementDelta, modifiers, button, buttons, relatedTarget, force, syntheticClickType, dataTransfer, isSimulated, isTrusted));
> }
> 
>-Ref<MouseEvent> MouseEvent::create(const AtomicString& eventType, CanBubble canBubble, IsCancelable isCancelable, IsComposed isComposed, RefPtr<WindowProxy>&& view, int detail,
>+Ref<MouseEvent> MouseEvent::create(const AtomString& eventType, CanBubble canBubble, IsCancelable isCancelable, IsComposed isComposed, RefPtr<WindowProxy>&& view, int detail,
> int screenX, int screenY, int clientX, int clientY, OptionSet<Modifier> modifiers, short button, unsigned short buttons,
> unsigned short syntheticClickType, EventTarget* relatedTarget)
> {
>@@ -78,7 +78,7 @@ Ref<MouseEvent> MouseEvent::create(const AtomicString& eventType, CanBubble canB
> 
> MouseEvent::MouseEvent() = default;
> 
>-MouseEvent::MouseEvent(const AtomicString& eventType, CanBubble canBubble, IsCancelable isCancelable, IsComposed isComposed,
>+MouseEvent::MouseEvent(const AtomString& eventType, CanBubble canBubble, IsCancelable isCancelable, IsComposed isComposed,
> MonotonicTime timestamp, RefPtr<WindowProxy>&& view, int detail,
> const IntPoint& screenLocation, const IntPoint& windowLocation, const IntPoint& movementDelta, OptionSet<Modifier> modifiers, short button, unsigned short buttons,
> EventTarget* relatedTarget, double force, unsigned short syntheticClickType, DataTransfer* dataTransfer, IsSimulated isSimulated, IsTrusted isTrusted)
>@@ -93,7 +93,7 @@ MouseEvent::MouseEvent(const AtomicString& eventType, CanBubble canBubble, IsCan
> {
> }
> 
>-MouseEvent::MouseEvent(const AtomicString& eventType, CanBubble canBubble, IsCancelable isCancelable, IsComposed isComposed,
>+MouseEvent::MouseEvent(const AtomString& eventType, CanBubble canBubble, IsCancelable isCancelable, IsComposed isComposed,
> RefPtr<WindowProxy>&& view, int detail, const IntPoint& screenLocation, const IntPoint& clientLocation,
> OptionSet<Modifier> modifiers, short button, unsigned short buttons, unsigned short syntheticClickType, EventTarget* relatedTarget)
> : MouseRelatedEvent(eventType, canBubble, isCancelable, isComposed, MonotonicTime::now(), WTFMove(view), detail, screenLocation, { }, { }, modifiers, IsSimulated::No)
>@@ -106,7 +106,7 @@ MouseEvent::MouseEvent(const AtomicString& eventType, CanBubble canBubble, IsCan
> initCoordinates(clientLocation);
> }
> 
>-MouseEvent::MouseEvent(const AtomicString& eventType, const MouseEventInit& initializer)
>+MouseEvent::MouseEvent(const AtomString& eventType, const MouseEventInit& initializer)
> : MouseRelatedEvent(eventType, initializer)
> , m_button(initializer.button == -2 ? 0 : initializer.button)
> , m_buttons(initializer.buttons)
>@@ -118,7 +118,7 @@ MouseEvent::MouseEvent(const AtomicString& eventType, const MouseEventInit& init
> 
> MouseEvent::~MouseEvent() = default;
> 
>-void MouseEvent::initMouseEvent(const AtomicString& type, bool canBubble, bool cancelable, RefPtr<WindowProxy>&& view, int detail,
>+void MouseEvent::initMouseEvent(const AtomString& type, bool canBubble, bool cancelable, RefPtr<WindowProxy>&& view, int detail,
> int screenX, int screenY, int clientX, int clientY, bool ctrlKey, bool altKey, bool shiftKey, bool metaKey, short button, EventTarget* relatedTarget)
> {
> if (isBeingDispatched())
>@@ -141,7 +141,7 @@ void MouseEvent::initMouseEvent(const AtomicString& type, bool canBubble, bool c
> 
> // FIXME: We need this quirk because iAd Producer is calling this function with a relatedTarget that is not an EventTarget (rdar://problem/30640101).
> // We should remove this quirk when possible.
>-void MouseEvent::initMouseEventQuirk(ExecState& state, ScriptExecutionContext& scriptExecutionContext, const AtomicString& type, bool canBubble, bool cancelable, RefPtr<WindowProxy>&& view, int detail, int screenX, int screenY, int clientX, int clientY, bool ctrlKey, bool altKey, bool shiftKey, bool metaKey, short button, JSValue relatedTargetValue)
>+void MouseEvent::initMouseEventQuirk(ExecState& state, ScriptExecutionContext& scriptExecutionContext, const AtomString& type, bool canBubble, bool cancelable, RefPtr<WindowProxy>&& view, int detail, int screenX, int screenY, int clientX, int clientY, bool ctrlKey, bool altKey, bool shiftKey, bool metaKey, short button, JSValue relatedTargetValue)
> {
> EventTarget* relatedTarget = nullptr;
> #if PLATFORM(MAC)
>diff --git a/Source/WebCore/dom/MouseEvent.h b/Source/WebCore/dom/MouseEvent.h
>index cf8200d72e3d813960c54939d932ad623e85ae5f..f460d012cd05aa9b6bd2d1140b760d688beb4208 100644
>--- a/Source/WebCore/dom/MouseEvent.h
>+++ b/Source/WebCore/dom/MouseEvent.h
>@@ -39,19 +39,19 @@ class PlatformMouseEvent;
> 
> class MouseEvent : public MouseRelatedEvent {
> public:
>- WEBCORE_EXPORT static Ref<MouseEvent> create(const AtomicString& type, CanBubble, IsCancelable, IsComposed, MonotonicTime timestamp, RefPtr<WindowProxy>&&, int detail,
>+ WEBCORE_EXPORT static Ref<MouseEvent> create(const AtomString& type, CanBubble, IsCancelable, IsComposed, MonotonicTime timestamp, RefPtr<WindowProxy>&&, int detail,
> const IntPoint& screenLocation, const IntPoint& windowLocation, const IntPoint& movementDelta, OptionSet<Modifier>, short button, unsigned short buttons,
> EventTarget* relatedTarget, double force, unsigned short syntheticClickType, DataTransfer* = nullptr, IsSimulated = IsSimulated::No, IsTrusted = IsTrusted::Yes);
> 
>- WEBCORE_EXPORT static Ref<MouseEvent> create(const AtomicString& eventType, RefPtr<WindowProxy>&&, const PlatformMouseEvent&, int detail, Node* relatedTarget);
>+ WEBCORE_EXPORT static Ref<MouseEvent> create(const AtomString& eventType, RefPtr<WindowProxy>&&, const PlatformMouseEvent&, int detail, Node* relatedTarget);
> 
>- static Ref<MouseEvent> create(const AtomicString& eventType, CanBubble, IsCancelable, IsComposed, RefPtr<WindowProxy>&&, int detail,
>+ static Ref<MouseEvent> create(const AtomString& eventType, CanBubble, IsCancelable, IsComposed, RefPtr<WindowProxy>&&, int detail,
> int screenX, int screenY, int clientX, int clientY, OptionSet<Modifier>, short button, unsigned short buttons,
> unsigned short syntheticClickType, EventTarget* relatedTarget);
> 
> static Ref<MouseEvent> createForBindings() { return adoptRef(*new MouseEvent); }
> 
>- static Ref<MouseEvent> create(const AtomicString& eventType, const MouseEventInit&);
>+ static Ref<MouseEvent> create(const AtomString& eventType, const MouseEventInit&);
> 
> #if ENABLE(TOUCH_EVENTS) && PLATFORM(IOS_FAMILY)
> static Ref<MouseEvent> create(const PlatformTouchEvent&, unsigned touchIndex, Ref<WindowProxy>&&);
>@@ -59,11 +59,11 @@ public:
> 
> virtual ~MouseEvent();
> 
>- WEBCORE_EXPORT void initMouseEvent(const AtomicString& type, bool canBubble, bool cancelable, RefPtr<WindowProxy>&&,
>+ WEBCORE_EXPORT void initMouseEvent(const AtomString& type, bool canBubble, bool cancelable, RefPtr<WindowProxy>&&,
> int detail, int screenX, int screenY, int clientX, int clientY, bool ctrlKey, bool altKey, bool shiftKey, bool metaKey,
> short button, EventTarget* relatedTarget);
> 
>- void initMouseEventQuirk(JSC::ExecState&, ScriptExecutionContext&, const AtomicString& type, bool canBubble, bool cancelable, RefPtr<WindowProxy>&&,
>+ void initMouseEventQuirk(JSC::ExecState&, ScriptExecutionContext&, const AtomString& type, bool canBubble, bool cancelable, RefPtr<WindowProxy>&&,
> int detail, int screenX, int screenY, int clientX, int clientY, bool ctrlKey, bool altKey, bool shiftKey, bool metaKey,
> short button, JSC::JSValue relatedTarget);
> 
>@@ -85,15 +85,15 @@ public:
> int which() const final;
> 
> protected:
>- MouseEvent(const AtomicString& type, CanBubble, IsCancelable, IsComposed, MonotonicTime timestamp, RefPtr<WindowProxy>&&, int detail,
>+ MouseEvent(const AtomString& type, CanBubble, IsCancelable, IsComposed, MonotonicTime timestamp, RefPtr<WindowProxy>&&, int detail,
> const IntPoint& screenLocation, const IntPoint& windowLocation, const IntPoint& movementDelta, OptionSet<Modifier>, short button, unsigned short buttons,
> EventTarget* relatedTarget, double force, unsigned short syntheticClickType, DataTransfer*, IsSimulated, IsTrusted);
> 
>- MouseEvent(const AtomicString& type, CanBubble, IsCancelable, IsComposed, RefPtr<WindowProxy>&&, int detail,
>+ MouseEvent(const AtomString& type, CanBubble, IsCancelable, IsComposed, RefPtr<WindowProxy>&&, int detail,
> const IntPoint& screenLocation, const IntPoint& clientLocation, OptionSet<Modifier>, short button, unsigned short buttons,
> unsigned short syntheticClickType, EventTarget* relatedTarget);
> 
>- MouseEvent(const AtomicString& type, const MouseEventInit&);
>+ MouseEvent(const AtomString& type, const MouseEventInit&);
> 
> MouseEvent();
> 
>diff --git a/Source/WebCore/dom/MouseRelatedEvent.cpp b/Source/WebCore/dom/MouseRelatedEvent.cpp
>index 73fed4571acdb443766bcd6881fe30bd0cd9c1e4..94c7e65c4158d3a961058ed2c11298a2a17ad9e4 100644
>--- a/Source/WebCore/dom/MouseRelatedEvent.cpp
>+++ b/Source/WebCore/dom/MouseRelatedEvent.cpp
>@@ -33,7 +33,7 @@
> 
> namespace WebCore {
> 
>-MouseRelatedEvent::MouseRelatedEvent(const AtomicString& eventType, CanBubble canBubble, IsCancelable isCancelable, IsComposed isComposed,
>+MouseRelatedEvent::MouseRelatedEvent(const AtomString& eventType, CanBubble canBubble, IsCancelable isCancelable, IsComposed isComposed,
> MonotonicTime timestamp, RefPtr<WindowProxy>&& view, int detail,
> const IntPoint& screenLocation, const IntPoint& windowLocation, const IntPoint& movementDelta, OptionSet<Modifier> modifiers, IsSimulated isSimulated, IsTrusted isTrusted)
> : UIEventWithKeyState(eventType, canBubble, isCancelable, isComposed, timestamp, WTFMove(view), detail, modifiers, isTrusted)
>@@ -49,13 +49,13 @@ MouseRelatedEvent::MouseRelatedEvent(const AtomicString& eventType, CanBubble ca
> init(m_isSimulated, windowLocation);
> }
> 
>-MouseRelatedEvent::MouseRelatedEvent(const AtomicString& type, IsCancelable isCancelable, MonotonicTime timestamp, RefPtr<WindowProxy>&& view, const IntPoint& globalLocation, OptionSet<Modifier> modifiers)
>+MouseRelatedEvent::MouseRelatedEvent(const AtomString& type, IsCancelable isCancelable, MonotonicTime timestamp, RefPtr<WindowProxy>&& view, const IntPoint& globalLocation, OptionSet<Modifier> modifiers)
> : MouseRelatedEvent(type, CanBubble::Yes, isCancelable, IsComposed::Yes, timestamp,
> WTFMove(view), 0, globalLocation, globalLocation /* Converted in init */, { }, modifiers, IsSimulated::No)
> {
> }
> 
>-MouseRelatedEvent::MouseRelatedEvent(const AtomicString& eventType, const MouseRelatedEventInit& initializer, IsTrusted isTrusted)
>+MouseRelatedEvent::MouseRelatedEvent(const AtomString& eventType, const MouseRelatedEventInit& initializer, IsTrusted isTrusted)
> : UIEventWithKeyState(eventType, initializer)
> , m_screenLocation(IntPoint(initializer.screenX, initializer.screenY))
> #if ENABLE(POINTER_LOCK)
>diff --git a/Source/WebCore/dom/MouseRelatedEvent.h b/Source/WebCore/dom/MouseRelatedEvent.h
>index 930d90d714b3567a7766e2aecb2e614d79567560..209214cd9de4adf70fb23769598afcf48d6b3a64 100644
>--- a/Source/WebCore/dom/MouseRelatedEvent.h
>+++ b/Source/WebCore/dom/MouseRelatedEvent.h
>@@ -76,11 +76,11 @@ public:
> 
> protected:
> MouseRelatedEvent() = default;
>- MouseRelatedEvent(const AtomicString& type, CanBubble, IsCancelable, IsComposed, MonotonicTime, RefPtr<WindowProxy>&&, int detail,
>+ MouseRelatedEvent(const AtomString& type, CanBubble, IsCancelable, IsComposed, MonotonicTime, RefPtr<WindowProxy>&&, int detail,
> const IntPoint& screenLocation, const IntPoint& windowLocation, const IntPoint& movementDelta, OptionSet<Modifier> modifiers,
> IsSimulated = IsSimulated::No, IsTrusted = IsTrusted::Yes);
>- MouseRelatedEvent(const AtomicString& type, IsCancelable, MonotonicTime, RefPtr<WindowProxy>&&, const IntPoint& globalLocation, OptionSet<Modifier>);
>- MouseRelatedEvent(const AtomicString& type, const MouseRelatedEventInit&, IsTrusted = IsTrusted::No);
>+ MouseRelatedEvent(const AtomString& type, IsCancelable, MonotonicTime, RefPtr<WindowProxy>&&, const IntPoint& globalLocation, OptionSet<Modifier>);
>+ MouseRelatedEvent(const AtomString& type, const MouseRelatedEventInit&, IsTrusted = IsTrusted::No);
> 
> void initCoordinates();
> void initCoordinates(const LayoutPoint& clientLocation);
>diff --git a/Source/WebCore/dom/MutationEvent.cpp b/Source/WebCore/dom/MutationEvent.cpp
>index 13a7c2256632580210400534ac8156f30fc4e76a..d6cafec145ba5dea920574a54b485e78eeb27e24 100644
>--- a/Source/WebCore/dom/MutationEvent.cpp
>+++ b/Source/WebCore/dom/MutationEvent.cpp
>@@ -25,7 +25,7 @@
> 
> namespace WebCore {
> 
>-MutationEvent::MutationEvent(const AtomicString& type, CanBubble canBubble, IsCancelable cancelable, Node* relatedNode, const String& prevValue, const String& newValue)
>+MutationEvent::MutationEvent(const AtomString& type, CanBubble canBubble, IsCancelable cancelable, Node* relatedNode, const String& prevValue, const String& newValue)
> : Event(type, canBubble, cancelable)
> , m_relatedNode(relatedNode)
> , m_prevValue(prevValue)
>@@ -33,7 +33,7 @@ MutationEvent::MutationEvent(const AtomicString& type, CanBubble canBubble, IsCa
> {
> }
> 
>-void MutationEvent::initMutationEvent(const AtomicString& type, bool canBubble, bool cancelable, Node* relatedNode, const String& prevValue, const String& newValue, const String& attrName, unsigned short attrChange)
>+void MutationEvent::initMutationEvent(const AtomString& type, bool canBubble, bool cancelable, Node* relatedNode, const String& prevValue, const String& newValue, const String& attrName, unsigned short attrChange)
> {
> if (isBeingDispatched())
> return;
>diff --git a/Source/WebCore/dom/MutationEvent.h b/Source/WebCore/dom/MutationEvent.h
>index e58ed187acb1c2b87186d1929fdb2905a3ff1a3b..3ba6cee071d722fc33188defd2d18c03c3d9b17d 100644
>--- a/Source/WebCore/dom/MutationEvent.h
>+++ b/Source/WebCore/dom/MutationEvent.h
>@@ -36,7 +36,7 @@ public:
> REMOVAL = 3
> };
> 
>- static Ref<MutationEvent> create(const AtomicString& type, CanBubble canBubble, Node* relatedNode = nullptr, const String& prevValue = String(), const String& newValue = String())
>+ static Ref<MutationEvent> create(const AtomString& type, CanBubble canBubble, Node* relatedNode = nullptr, const String& prevValue = String(), const String& newValue = String())
> {
> return adoptRef(*new MutationEvent(type, canBubble, IsCancelable::No, relatedNode, prevValue, newValue));
> }
>@@ -46,7 +46,7 @@ public:
> return adoptRef(*new MutationEvent);
> }
> 
>- WEBCORE_EXPORT void initMutationEvent(const AtomicString& type, bool canBubble, bool cancelable, Node* relatedNode, const String& prevValue, const String& newValue, const String& attrName, unsigned short attrChange);
>+ WEBCORE_EXPORT void initMutationEvent(const AtomString& type, bool canBubble, bool cancelable, Node* relatedNode, const String& prevValue, const String& newValue, const String& attrName, unsigned short attrChange);
> 
> Node* relatedNode() const { return m_relatedNode.get(); }
> String prevValue() const { return m_prevValue; }
>@@ -56,7 +56,7 @@ public:
> 
> private:
> MutationEvent() = default;
>- MutationEvent(const AtomicString& type, CanBubble, IsCancelable, Node* relatedNode, const String& prevValue, const String& newValue);
>+ MutationEvent(const AtomString& type, CanBubble, IsCancelable, Node* relatedNode, const String& prevValue, const String& newValue);
> 
> EventInterface eventInterface() const final;
> 
>diff --git a/Source/WebCore/dom/MutationObserver.cpp b/Source/WebCore/dom/MutationObserver.cpp
>index 6f79a74401f0d92b5da8f397b2483e2ce06ac9a3..66c5ea0b9d6345443812fb131ffe5dbe6ca1ddf3 100644
>--- a/Source/WebCore/dom/MutationObserver.cpp
>+++ b/Source/WebCore/dom/MutationObserver.cpp
>@@ -90,7 +90,7 @@ ExceptionOr<void> MutationObserver::observe(Node& node, const Init& init)
> if (init.characterDataOldValue.valueOr(false))
> options |= CharacterDataOldValue;
> 
>- HashSet<AtomicString> attributeFilter;
>+ HashSet<AtomString> attributeFilter;
> if (init.attributeFilter) {
> for (auto& value : init.attributeFilter.value())
> attributeFilter.add(value);
>diff --git a/Source/WebCore/dom/MutationObserverRegistration.cpp b/Source/WebCore/dom/MutationObserverRegistration.cpp
>index 442c30a7bdd1f927cf473b990e2d44eb911e1792..c8fc01067245e4e36197a2f6d4d1e457547bbc8a 100644
>--- a/Source/WebCore/dom/MutationObserverRegistration.cpp
>+++ b/Source/WebCore/dom/MutationObserverRegistration.cpp
>@@ -37,7 +37,7 @@
> 
> namespace WebCore {
> 
>-MutationObserverRegistration::MutationObserverRegistration(MutationObserver& observer, Node& node, MutationObserverOptions options, const HashSet<AtomicString>& attributeFilter)
>+MutationObserverRegistration::MutationObserverRegistration(MutationObserver& observer, Node& node, MutationObserverOptions options, const HashSet<AtomString>& attributeFilter)
> : m_observer(observer)
> , m_node(node)
> , m_options(options)
>@@ -52,7 +52,7 @@ MutationObserverRegistration::~MutationObserverRegistration()
> m_observer->observationEnded(*this);
> }
> 
>-void MutationObserverRegistration::resetObservation(MutationObserverOptions options, const HashSet<AtomicString>& attributeFilter)
>+void MutationObserverRegistration::resetObservation(MutationObserverOptions options, const HashSet<AtomString>& attributeFilter)
> {
> takeTransientRegistrations();
> m_options = options;
>diff --git a/Source/WebCore/dom/MutationObserverRegistration.h b/Source/WebCore/dom/MutationObserverRegistration.h
>index 59d43d268bd4fa866b9e337c51c2fe9987813e85..e6940483a313c8fd1bd16dc17cb96b13acd22a3a 100644
>--- a/Source/WebCore/dom/MutationObserverRegistration.h
>+++ b/Source/WebCore/dom/MutationObserverRegistration.h
>@@ -33,8 +33,8 @@
> #include "GCReachableRef.h"
> #include "MutationObserver.h"
> #include <wtf/HashSet.h>
>-#include <wtf/text/AtomicString.h>
>-#include <wtf/text/AtomicStringHash.h>
>+#include <wtf/text/AtomString.h>
>+#include <wtf/text/AtomStringHash.h>
> 
> namespace WebCore {
> 
>@@ -43,10 +43,10 @@ class QualifiedName;
> class MutationObserverRegistration {
> WTF_MAKE_FAST_ALLOCATED;
> public:
>- MutationObserverRegistration(MutationObserver&, Node&, MutationObserverOptions, const HashSet<AtomicString>& attributeFilter);
>+ MutationObserverRegistration(MutationObserver&, Node&, MutationObserverOptions, const HashSet<AtomString>& attributeFilter);
> ~MutationObserverRegistration();
> 
>- void resetObservation(MutationObserverOptions, const HashSet<AtomicString>& attributeFilter);
>+ void resetObservation(MutationObserverOptions, const HashSet<AtomString>& attributeFilter);
> void observedSubtreeNodeWillDetach(Node&);
> std::unique_ptr<HashSet<GCReachableRef<Node>>> takeTransientRegistrations();
> bool hasTransientRegistrations() const { return m_transientRegistrationNodes && !m_transientRegistrationNodes->isEmpty(); }
>@@ -67,7 +67,7 @@ private:
> RefPtr<Node> m_nodeKeptAlive;
> std::unique_ptr<HashSet<GCReachableRef<Node>>> m_transientRegistrationNodes;
> MutationObserverOptions m_options;
>- HashSet<AtomicString> m_attributeFilter;
>+ HashSet<AtomString> m_attributeFilter;
> };
> 
> } // namespace WebCore
>diff --git a/Source/WebCore/dom/MutationRecord.cpp b/Source/WebCore/dom/MutationRecord.cpp
>index 257b5ea256968171f6c171359aacdf4f040eafd6..519320d46991c14b372781acceac74903c082a18 100644
>--- a/Source/WebCore/dom/MutationRecord.cpp
>+++ b/Source/WebCore/dom/MutationRecord.cpp
>@@ -61,7 +61,7 @@ public:
> }
> 
> private:
>- const AtomicString& type() override;
>+ const AtomString& type() override;
> Node* target() override { return m_target.ptr(); }
> NodeList* addedNodes() override { return m_addedNodes.get(); }
> NodeList* removedNodes() override { return m_removedNodes.get(); }
>@@ -118,7 +118,7 @@ private:
> 
> class AttributesRecord final : public RecordWithEmptyNodeLists {
> public:
>- AttributesRecord(Element& target, const QualifiedName& name, const AtomicString& oldValue)
>+ AttributesRecord(Element& target, const QualifiedName& name, const AtomString& oldValue)
> : RecordWithEmptyNodeLists(target, oldValue)
> , m_attributeName(name.localName())
> , m_attributeNamespace(name.namespaceURI())
>@@ -126,12 +126,12 @@ public:
> }
> 
> private:
>- const AtomicString& type() override;
>- const AtomicString& attributeName() override { return m_attributeName; }
>- const AtomicString& attributeNamespace() override { return m_attributeNamespace; }
>+ const AtomString& type() override;
>+ const AtomString& attributeName() override { return m_attributeName; }
>+ const AtomString& attributeNamespace() override { return m_attributeNamespace; }
> 
>- AtomicString m_attributeName;
>- AtomicString m_attributeNamespace;
>+ AtomString m_attributeName;
>+ AtomString m_attributeNamespace;
> };
> 
> class CharacterDataRecord : public RecordWithEmptyNodeLists {
>@@ -142,7 +142,7 @@ public:
> }
> 
> private:
>- const AtomicString& type() override;
>+ const AtomString& type() override;
> };
> 
> class MutationRecordWithNullOldValue final : public MutationRecord {
>@@ -153,14 +153,14 @@ public:
> }
> 
> private:
>- const AtomicString& type() override { return m_record->type(); }
>+ const AtomString& type() override { return m_record->type(); }
> Node* target() override { return m_record->target(); }
> NodeList* addedNodes() override { return m_record->addedNodes(); }
> NodeList* removedNodes() override { return m_record->removedNodes(); }
> Node* previousSibling() override { return m_record->previousSibling(); }
> Node* nextSibling() override { return m_record->nextSibling(); }
>- const AtomicString& attributeName() override { return m_record->attributeName(); }
>- const AtomicString& attributeNamespace() override { return m_record->attributeNamespace(); }
>+ const AtomString& attributeName() override { return m_record->attributeName(); }
>+ const AtomString& attributeNamespace() override { return m_record->attributeNamespace(); }
> 
> String oldValue() override { return String(); }
> 
>@@ -172,21 +172,21 @@ private:
> Ref<MutationRecord> m_record;
> };
> 
>-const AtomicString& ChildListRecord::type()
>+const AtomString& ChildListRecord::type()
> {
>- static NeverDestroyed<AtomicString> childList("childList", AtomicString::ConstructFromLiteral);
>+ static NeverDestroyed<AtomString> childList("childList", AtomString::ConstructFromLiteral);
> return childList;
> }
> 
>-const AtomicString& AttributesRecord::type()
>+const AtomString& AttributesRecord::type()
> {
>- static NeverDestroyed<AtomicString> attributes("attributes", AtomicString::ConstructFromLiteral);
>+ static NeverDestroyed<AtomString> attributes("attributes", AtomString::ConstructFromLiteral);
> return attributes;
> }
> 
>-const AtomicString& CharacterDataRecord::type()
>+const AtomString& CharacterDataRecord::type()
> {
>- static NeverDestroyed<AtomicString> characterData("characterData", AtomicString::ConstructFromLiteral);
>+ static NeverDestroyed<AtomString> characterData("characterData", AtomString::ConstructFromLiteral);
> return characterData;
> }
> 
>@@ -197,7 +197,7 @@ Ref<MutationRecord> MutationRecord::createChildList(ContainerNode& target, Ref<N
> return adoptRef(static_cast<MutationRecord&>(*new ChildListRecord(target, WTFMove(added), WTFMove(removed), WTFMove(previousSibling), WTFMove(nextSibling))));
> }
> 
>-Ref<MutationRecord> MutationRecord::createAttributes(Element& target, const QualifiedName& name, const AtomicString& oldValue)
>+Ref<MutationRecord> MutationRecord::createAttributes(Element& target, const QualifiedName& name, const AtomString& oldValue)
> {
> return adoptRef(static_cast<MutationRecord&>(*new AttributesRecord(target, name, oldValue)));
> }
>diff --git a/Source/WebCore/dom/MutationRecord.h b/Source/WebCore/dom/MutationRecord.h
>index 8872b4482e8bbc829c5bc5ce511712e39606a682..37542f630caae96c199f70296c2a2237e511bdba 100644
>--- a/Source/WebCore/dom/MutationRecord.h
>+++ b/Source/WebCore/dom/MutationRecord.h
>@@ -52,14 +52,14 @@ class QualifiedName;
> class MutationRecord : public RefCounted<MutationRecord> {
> public:
> static Ref<MutationRecord> createChildList(ContainerNode& target, Ref<NodeList>&& added, Ref<NodeList>&& removed, RefPtr<Node>&& previousSibling, RefPtr<Node>&& nextSibling);
>- static Ref<MutationRecord> createAttributes(Element& target, const QualifiedName&, const AtomicString& oldValue);
>+ static Ref<MutationRecord> createAttributes(Element& target, const QualifiedName&, const AtomString& oldValue);
> static Ref<MutationRecord> createCharacterData(CharacterData& target, const String& oldValue);
> 
> static Ref<MutationRecord> createWithNullOldValue(MutationRecord&);
> 
> virtual ~MutationRecord();
> 
>- virtual const AtomicString& type() = 0;
>+ virtual const AtomString& type() = 0;
> virtual Node* target() = 0;
> 
> virtual NodeList* addedNodes() = 0;
>@@ -67,8 +67,8 @@ public:
> virtual Node* previousSibling() { return 0; }
> virtual Node* nextSibling() { return 0; }
> 
>- virtual const AtomicString& attributeName() { return nullAtom(); }
>- virtual const AtomicString& attributeNamespace() { return nullAtom(); }
>+ virtual const AtomString& attributeName() { return nullAtom(); }
>+ virtual const AtomString& attributeNamespace() { return nullAtom(); }
> 
> virtual String oldValue() { return String(); }
> 
>diff --git a/Source/WebCore/dom/NameNodeList.cpp b/Source/WebCore/dom/NameNodeList.cpp
>index 0bb82381026df393f0e84608f08054fa587fc997..2a0afb801edeaef5a8b01749a5234526957b9eb2 100644
>--- a/Source/WebCore/dom/NameNodeList.cpp
>+++ b/Source/WebCore/dom/NameNodeList.cpp
>@@ -32,7 +32,7 @@ using namespace HTMLNames;
> 
> WTF_MAKE_ISO_ALLOCATED_IMPL(NameNodeList);
> 
>-NameNodeList::NameNodeList(ContainerNode& rootNode, const AtomicString& name)
>+NameNodeList::NameNodeList(ContainerNode& rootNode, const AtomString& name)
> : CachedLiveNodeList(rootNode, InvalidateOnNameAttrChange)
> , m_name(name)
> {
>diff --git a/Source/WebCore/dom/NameNodeList.h b/Source/WebCore/dom/NameNodeList.h
>index 85eece24847b83cc7055751a4c331f8c35d48a95..70c5c700e950e531437f0fde51ccc38d6dcb3aa1 100644
>--- a/Source/WebCore/dom/NameNodeList.h
>+++ b/Source/WebCore/dom/NameNodeList.h
>@@ -25,7 +25,7 @@
> 
> #include "LiveNodeList.h"
> #include <wtf/Forward.h>
>-#include <wtf/text/AtomicString.h>
>+#include <wtf/text/AtomString.h>
> 
> namespace WebCore {
> 
>@@ -33,7 +33,7 @@ namespace WebCore {
> class NameNodeList final : public CachedLiveNodeList<NameNodeList> {
> WTF_MAKE_ISO_ALLOCATED(NameNodeList);
> public:
>- static Ref<NameNodeList> create(ContainerNode& rootNode, const AtomicString& name)
>+ static Ref<NameNodeList> create(ContainerNode& rootNode, const AtomString& name)
> {
> return adoptRef(*new NameNodeList(rootNode, name));
> }
>@@ -44,9 +44,9 @@ public:
> bool isRootedAtDocument() const override { return false; }
> 
> private:
>- NameNodeList(ContainerNode& rootNode, const AtomicString& name);
>+ NameNodeList(ContainerNode& rootNode, const AtomString& name);
> 
>- AtomicString m_name;
>+ AtomString m_name;
> };
> 
> inline bool NameNodeList::elementMatches(Element& element) const
>diff --git a/Source/WebCore/dom/NamedNodeMap.cpp b/Source/WebCore/dom/NamedNodeMap.cpp
>index 75ba66d4f0b26103cb2851bba7f3de448348825f..2771902ca402590cc735a89e00c86f5d6c9a9cf9 100644
>--- a/Source/WebCore/dom/NamedNodeMap.cpp
>+++ b/Source/WebCore/dom/NamedNodeMap.cpp
>@@ -45,17 +45,17 @@ void NamedNodeMap::deref()
> m_element.deref();
> }
> 
>-RefPtr<Attr> NamedNodeMap::getNamedItem(const AtomicString& name) const
>+RefPtr<Attr> NamedNodeMap::getNamedItem(const AtomString& name) const
> {
> return m_element.getAttributeNode(name);
> }
> 
>-RefPtr<Attr> NamedNodeMap::getNamedItemNS(const AtomicString& namespaceURI, const AtomicString& localName) const
>+RefPtr<Attr> NamedNodeMap::getNamedItemNS(const AtomString& namespaceURI, const AtomString& localName) const
> {
> return m_element.getAttributeNodeNS(namespaceURI, localName);
> }
> 
>-ExceptionOr<Ref<Attr>> NamedNodeMap::removeNamedItem(const AtomicString& name)
>+ExceptionOr<Ref<Attr>> NamedNodeMap::removeNamedItem(const AtomString& name)
> {
> if (!m_element.hasAttributes())
> return Exception { NotFoundError };
>@@ -80,7 +80,7 @@ Vector<String> NamedNodeMap::supportedPropertyNames() const
> return names;
> }
> 
>-ExceptionOr<Ref<Attr>> NamedNodeMap::removeNamedItemNS(const AtomicString& namespaceURI, const AtomicString& localName)
>+ExceptionOr<Ref<Attr>> NamedNodeMap::removeNamedItemNS(const AtomString& namespaceURI, const AtomString& localName)
> {
> if (!m_element.hasAttributes())
> return Exception { NotFoundError };
>diff --git a/Source/WebCore/dom/NamedNodeMap.h b/Source/WebCore/dom/NamedNodeMap.h
>index d30d23aa5bafefb420e2d185365fbc242d6d06aa..1ce768119db7079f18df52dd7723c60dc272d62d 100644
>--- a/Source/WebCore/dom/NamedNodeMap.h
>+++ b/Source/WebCore/dom/NamedNodeMap.h
>@@ -45,11 +45,11 @@ public:
> 
> WEBCORE_EXPORT unsigned length() const;
> WEBCORE_EXPORT RefPtr<Attr> item(unsigned index) const;
>- WEBCORE_EXPORT RefPtr<Attr> getNamedItem(const AtomicString&) const;
>- WEBCORE_EXPORT RefPtr<Attr> getNamedItemNS(const AtomicString& namespaceURI, const AtomicString& localName) const;
>+ WEBCORE_EXPORT RefPtr<Attr> getNamedItem(const AtomString&) const;
>+ WEBCORE_EXPORT RefPtr<Attr> getNamedItemNS(const AtomString& namespaceURI, const AtomString& localName) const;
> WEBCORE_EXPORT ExceptionOr<RefPtr<Attr>> setNamedItem(Attr&);
>- WEBCORE_EXPORT ExceptionOr<Ref<Attr>> removeNamedItem(const AtomicString& name);
>- WEBCORE_EXPORT ExceptionOr<Ref<Attr>> removeNamedItemNS(const AtomicString& namespaceURI, const AtomicString& localName);
>+ WEBCORE_EXPORT ExceptionOr<Ref<Attr>> removeNamedItem(const AtomString& name);
>+ WEBCORE_EXPORT ExceptionOr<Ref<Attr>> removeNamedItemNS(const AtomString& namespaceURI, const AtomString& localName);
> 
> Vector<String> supportedPropertyNames() const;
> 
>diff --git a/Source/WebCore/dom/Node.cpp b/Source/WebCore/dom/Node.cpp
>index 15041e922753f108fdb192e28a35851b7f6747f7..fae18a95d8ba1ac2f57a2d22a47deb8c0ae3ccde 100644
>--- a/Source/WebCore/dom/Node.cpp
>+++ b/Source/WebCore/dom/Node.cpp
>@@ -687,13 +687,13 @@ ExceptionOr<Ref<Node>> Node::cloneNodeForBindings(bool deep)
> return cloneNode(deep);
> }
> 
>-const AtomicString& Node::prefix() const
>+const AtomString& Node::prefix() const
> {
> // For nodes other than elements and attributes, the prefix is always null
> return nullAtom();
> }
> 
>-ExceptionOr<void> Node::setPrefix(const AtomicString&)
>+ExceptionOr<void> Node::setPrefix(const AtomString&)
> {
> // The spec says that for nodes other than elements and attributes, prefix is always null.
> // It does not say what to do when the user tries to set the prefix on another type of
>@@ -701,12 +701,12 @@ ExceptionOr<void> Node::setPrefix(const AtomicString&)
> return Exception { NamespaceError };
> }
> 
>-const AtomicString& Node::localName() const
>+const AtomString& Node::localName() const
> {
> return nullAtom();
> }
> 
>-const AtomicString& Node::namespaceURI() const
>+const AtomString& Node::namespaceURI() const
> {
> return nullAtom();
> }
>@@ -976,7 +976,7 @@ void Node::clearNodeLists()
> rareData()->clearNodeLists();
> }
> 
>-ExceptionOr<void> Node::checkSetPrefix(const AtomicString& prefix)
>+ExceptionOr<void> Node::checkSetPrefix(const AtomString& prefix)
> {
> // Perform error checking as required by spec for setting Node.prefix. Used by
> // Element::setPrefix() and Attr::setPrefix()
>@@ -1411,7 +1411,7 @@ bool Node::isEqualNode(Node* other) const
> }
> 
> // https://dom.spec.whatwg.org/#locate-a-namespace
>-static const AtomicString& locateDefaultNamespace(const Node& node, const AtomicString& prefix)
>+static const AtomString& locateDefaultNamespace(const Node& node, const AtomString& prefix)
> {
> switch (node.nodeType()) {
> case Node::ELEMENT_NODE: {
>@@ -1453,21 +1453,21 @@ static const AtomicString& locateDefaultNamespace(const Node& node, const Atomic
> }
> 
> // https://dom.spec.whatwg.org/#dom-node-isdefaultnamespace
>-bool Node::isDefaultNamespace(const AtomicString& potentiallyEmptyNamespace) const
>+bool Node::isDefaultNamespace(const AtomString& potentiallyEmptyNamespace) const
> {
>- const AtomicString& namespaceURI = potentiallyEmptyNamespace.isEmpty() ? nullAtom() : potentiallyEmptyNamespace;
>+ const AtomString& namespaceURI = potentiallyEmptyNamespace.isEmpty() ? nullAtom() : potentiallyEmptyNamespace;
> return locateDefaultNamespace(*this, nullAtom()) == namespaceURI;
> }
> 
> // https://dom.spec.whatwg.org/#dom-node-lookupnamespaceuri
>-const AtomicString& Node::lookupNamespaceURI(const AtomicString& potentiallyEmptyPrefix) const
>+const AtomString& Node::lookupNamespaceURI(const AtomString& potentiallyEmptyPrefix) const
> {
>- const AtomicString& prefix = potentiallyEmptyPrefix.isEmpty() ? nullAtom() : potentiallyEmptyPrefix;
>+ const AtomString& prefix = potentiallyEmptyPrefix.isEmpty() ? nullAtom() : potentiallyEmptyPrefix;
> return locateDefaultNamespace(*this, prefix);
> }
> 
> // https://dom.spec.whatwg.org/#locate-a-namespace-prefix
>-static const AtomicString& locateNamespacePrefix(const Element& element, const AtomicString& namespaceURI)
>+static const AtomString& locateNamespacePrefix(const Element& element, const AtomString& namespaceURI)
> {
> if (element.namespaceURI() == namespaceURI)
> return element.prefix();
>@@ -1483,7 +1483,7 @@ static const AtomicString& locateNamespacePrefix(const Element& element, const A
> }
> 
> // https://dom.spec.whatwg.org/#dom-node-lookupprefix
>-const AtomicString& Node::lookupPrefix(const AtomicString& namespaceURI) const
>+const AtomString& Node::lookupPrefix(const AtomString& namespaceURI) const
> {
> if (namespaceURI.isEmpty())
> return nullAtom();
>@@ -1741,7 +1741,7 @@ static void appendAttributeDesc(const Node* node, StringBuilder& stringBuilder,
> if (!is<Element>(*node))
> return;
> 
>- const AtomicString& attr = downcast<Element>(*node).getAttribute(name);
>+ const AtomString& attr = downcast<Element>(*node).getAttribute(name);
> if (attr.isEmpty())
> return;
> 
>@@ -1794,7 +1794,7 @@ void Node::showNodePathForThis() const
> fprintf(stderr, "/%s", node->nodeName().utf8().data());
> 
> const Element& element = downcast<Element>(*node);
>- const AtomicString& idattr = element.getIdAttribute();
>+ const AtomString& idattr = element.getIdAttribute();
> bool hasIdAttr = !idattr.isNull() && !idattr.isEmpty();
> if (node->previousSibling() || node->nextSibling()) {
> int count = 0;
>@@ -2104,7 +2104,7 @@ void Node::moveNodeToNewDocument(Document& oldDocument, Document& newDocument)
> downcast<Element>(*this).didMoveToNewDocument(oldDocument, newDocument);
> }
> 
>-static inline bool tryAddEventListener(Node* targetNode, const AtomicString& eventType, Ref<EventListener>&& listener, const EventTarget::AddEventListenerOptions& options)
>+static inline bool tryAddEventListener(Node* targetNode, const AtomString& eventType, Ref<EventListener>&& listener, const EventTarget::AddEventListenerOptions& options)
> {
> if (!targetNode->EventTarget::addEventListener(eventType, listener.copyRef(), options))
> return false;
>@@ -2133,12 +2133,12 @@ static inline bool tryAddEventListener(Node* targetNode, const AtomicString& eve
> return true;
> }
> 
>-bool Node::addEventListener(const AtomicString& eventType, Ref<EventListener>&& listener, const AddEventListenerOptions& options)
>+bool Node::addEventListener(const AtomString& eventType, Ref<EventListener>&& listener, const AddEventListenerOptions& options)
> {
> return tryAddEventListener(this, eventType, WTFMove(listener), options);
> }
> 
>-static inline bool tryRemoveEventListener(Node* targetNode, const AtomicString& eventType, EventListener& listener, const EventTarget::ListenerOptions& options)
>+static inline bool tryRemoveEventListener(Node* targetNode, const AtomString& eventType, EventListener& listener, const EventTarget::ListenerOptions& options)
> {
> if (!targetNode->EventTarget::removeEventListener(eventType, listener, options))
> return false;
>@@ -2168,7 +2168,7 @@ static inline bool tryRemoveEventListener(Node* targetNode, const AtomicString&
> return true;
> }
> 
>-bool Node::removeEventListener(const AtomicString& eventType, EventListener& listener, const ListenerOptions& options)
>+bool Node::removeEventListener(const AtomString& eventType, EventListener& listener, const ListenerOptions& options)
> {
> return tryRemoveEventListener(this, eventType, listener, options);
> }
>@@ -2271,7 +2271,7 @@ HashMap<Ref<MutationObserver>, MutationRecordDeliveryOptions> Node::registeredMu
> return result;
> }
> 
>-void Node::registerMutationObserver(MutationObserver& observer, MutationObserverOptions options, const HashSet<AtomicString>& attributeFilter)
>+void Node::registerMutationObserver(MutationObserver& observer, MutationObserverOptions options, const HashSet<AtomString>& attributeFilter)
> {
> MutationObserverRegistration* registration = nullptr;
> auto& registry = ensureRareData().ensureMutationObserverData().registry;
>@@ -2367,7 +2367,7 @@ void Node::dispatchSubtreeModifiedEvent()
> 
> if (!document().hasListenerType(Document::DOMSUBTREEMODIFIED_LISTENER))
> return;
>- const AtomicString& subtreeModifiedEventName = eventNames().DOMSubtreeModifiedEvent;
>+ const AtomString& subtreeModifiedEventName = eventNames().DOMSubtreeModifiedEvent;
> if (!parentNode() && !hasEventListeners(subtreeModifiedEventName))
> return;
> 
>@@ -2405,7 +2405,7 @@ void Node::defaultEventHandler(Event& event)
> {
> if (event.target() != this)
> return;
>- const AtomicString& eventType = event.type();
>+ const AtomString& eventType = event.type();
> if (eventType == eventNames().keydownEvent || eventType == eventNames().keypressEvent) {
> if (is<KeyboardEvent>(event)) {
> if (Frame* frame = document().frame())
>diff --git a/Source/WebCore/dom/Node.h b/Source/WebCore/dom/Node.h
>index fccdd7df6fce77401a1d430bd24c232ca6c987a4..5f85223ba6c11ec9227e5a2ba0ad8a490e84588c 100644
>--- a/Source/WebCore/dom/Node.h
>+++ b/Source/WebCore/dom/Node.h
>@@ -165,17 +165,17 @@ public:
> Ref<Node> cloneNode(bool deep) { return cloneNodeInternal(document(), deep ? CloningOperation::Everything : CloningOperation::OnlySelf); }
> WEBCORE_EXPORT ExceptionOr<Ref<Node>> cloneNodeForBindings(bool deep);
> 
>- virtual const AtomicString& localName() const;
>- virtual const AtomicString& namespaceURI() const;
>- virtual const AtomicString& prefix() const;
>- virtual ExceptionOr<void> setPrefix(const AtomicString&);
>+ virtual const AtomString& localName() const;
>+ virtual const AtomString& namespaceURI() const;
>+ virtual const AtomString& prefix() const;
>+ virtual ExceptionOr<void> setPrefix(const AtomString&);
> WEBCORE_EXPORT void normalize();
> 
> bool isSameNode(Node* other) const { return this == other; }
> WEBCORE_EXPORT bool isEqualNode(Node*) const;
>- WEBCORE_EXPORT bool isDefaultNamespace(const AtomicString& namespaceURI) const;
>- WEBCORE_EXPORT const AtomicString& lookupPrefix(const AtomicString& namespaceURI) const;
>- WEBCORE_EXPORT const AtomicString& lookupNamespaceURI(const AtomicString& prefix) const;
>+ WEBCORE_EXPORT bool isDefaultNamespace(const AtomString& namespaceURI) const;
>+ WEBCORE_EXPORT const AtomString& lookupPrefix(const AtomString& namespaceURI) const;
>+ WEBCORE_EXPORT const AtomString& lookupNamespaceURI(const AtomString& prefix) const;
> 
> WEBCORE_EXPORT String textContent(bool convertBRsToNewlines = false) const;
> WEBCORE_EXPORT ExceptionOr<void> setTextContent(const String&);
>@@ -384,7 +384,7 @@ public:
> unsigned countChildNodes() const;
> Node* traverseToChildAt(unsigned) const;
> 
>- ExceptionOr<void> checkSetPrefix(const AtomicString& prefix);
>+ ExceptionOr<void> checkSetPrefix(const AtomString& prefix);
> 
> WEBCORE_EXPORT bool isDescendantOf(const Node&) const;
> bool isDescendantOf(const Node* other) const { return other && isDescendantOf(*other); }
>@@ -472,8 +472,8 @@ public:
> EventTargetInterface eventTargetInterface() const override;
> ScriptExecutionContext* scriptExecutionContext() const final; // Implemented in Document.h
> 
>- bool addEventListener(const AtomicString& eventType, Ref<EventListener>&&, const AddEventListenerOptions&) override;
>- bool removeEventListener(const AtomicString& eventType, EventListener&, const ListenerOptions&) override;
>+ bool addEventListener(const AtomString& eventType, Ref<EventListener>&&, const AddEventListenerOptions&) override;
>+ bool removeEventListener(const AtomString& eventType, EventListener&, const ListenerOptions&) override;
> 
> using EventTarget::dispatchEvent;
> void dispatchEvent(Event&) override;
>@@ -512,7 +512,7 @@ public:
> EventTargetData& ensureEventTargetData() final;
> 
> HashMap<Ref<MutationObserver>, MutationRecordDeliveryOptions> registeredMutationObservers(MutationObserver::MutationType, const QualifiedName* attributeName);
>- void registerMutationObserver(MutationObserver&, MutationObserverOptions, const HashSet<AtomicString>& attributeFilter);
>+ void registerMutationObserver(MutationObserver&, MutationObserverOptions, const HashSet<AtomString>& attributeFilter);
> void unregisterMutationObserver(MutationObserverRegistration&);
> void registerTransientMutationObserver(MutationObserverRegistration&);
> void unregisterTransientMutationObserver(MutationObserverRegistration&);
>diff --git a/Source/WebCore/dom/NodeRareData.h b/Source/WebCore/dom/NodeRareData.h
>index 4f8502bf8f5f2e4787d4511635107b49cd597ee5..6822f66cae371702799659405683db0819901f3c 100644
>--- a/Source/WebCore/dom/NodeRareData.h
>+++ b/Source/WebCore/dom/NodeRareData.h
>@@ -29,7 +29,7 @@
> #include "QualifiedName.h"
> #include "TagCollection.h"
> #include <wtf/HashSet.h>
>-#include <wtf/text/AtomicString.h>
>+#include <wtf/text/AtomString.h>
> 
> namespace WebCore {
> 
>@@ -95,20 +95,20 @@ public:
> }
> 
> struct NodeListCacheMapEntryHash {
>- static unsigned hash(const std::pair<unsigned char, AtomicString>& entry)
>+ static unsigned hash(const std::pair<unsigned char, AtomString>& entry)
> {
>- return DefaultHash<AtomicString>::Hash::hash(entry.second) + entry.first;
>+ return DefaultHash<AtomString>::Hash::hash(entry.second) + entry.first;
> }
>- static bool equal(const std::pair<unsigned char, AtomicString>& a, const std::pair<unsigned char, AtomicString>& b) { return a.first == b.first && DefaultHash<AtomicString>::Hash::equal(a.second, b.second); }
>- static const bool safeToCompareToEmptyOrDeleted = DefaultHash<AtomicString>::Hash::safeToCompareToEmptyOrDeleted;
>+ static bool equal(const std::pair<unsigned char, AtomString>& a, const std::pair<unsigned char, AtomString>& b) { return a.first == b.first && DefaultHash<AtomString>::Hash::equal(a.second, b.second); }
>+ static const bool safeToCompareToEmptyOrDeleted = DefaultHash<AtomString>::Hash::safeToCompareToEmptyOrDeleted;
> };
> 
>- typedef HashMap<std::pair<unsigned char, AtomicString>, LiveNodeList*, NodeListCacheMapEntryHash> NodeListAtomicNameCacheMap;
>- typedef HashMap<std::pair<unsigned char, AtomicString>, HTMLCollection*, NodeListCacheMapEntryHash> CollectionCacheMap;
>+ typedef HashMap<std::pair<unsigned char, AtomString>, LiveNodeList*, NodeListCacheMapEntryHash> NodeListAtomicNameCacheMap;
>+ typedef HashMap<std::pair<unsigned char, AtomString>, HTMLCollection*, NodeListCacheMapEntryHash> CollectionCacheMap;
> typedef HashMap<QualifiedName, TagCollectionNS*> TagCollectionNSCache;
> 
> template<typename T, typename ContainerType>
>- ALWAYS_INLINE Ref<T> addCacheWithAtomicName(ContainerType& container, const AtomicString& name)
>+ ALWAYS_INLINE Ref<T> addCacheWithAtomicName(ContainerType& container, const AtomString& name)
> {
> NodeListAtomicNameCacheMap::AddResult result = m_atomicNameCaches.fastAdd(namedNodeListKey<T>(name), nullptr);
> if (!result.isNewEntry)
>@@ -119,7 +119,7 @@ public:
> return list;
> }
> 
>- ALWAYS_INLINE Ref<TagCollectionNS> addCachedTagCollectionNS(ContainerNode& node, const AtomicString& namespaceURI, const AtomicString& localName)
>+ ALWAYS_INLINE Ref<TagCollectionNS> addCachedTagCollectionNS(ContainerNode& node, const AtomString& namespaceURI, const AtomString& localName)
> {
> QualifiedName name(nullAtom(), localName, namespaceURI);
> TagCollectionNSCache::AddResult result = m_tagCollectionNSCache.fastAdd(name, nullptr);
>@@ -132,7 +132,7 @@ public:
> }
> 
> template<typename T, typename ContainerType>
>- ALWAYS_INLINE Ref<T> addCachedCollection(ContainerType& container, CollectionType collectionType, const AtomicString& name)
>+ ALWAYS_INLINE Ref<T> addCachedCollection(ContainerType& container, CollectionType collectionType, const AtomString& name)
> {
> CollectionCacheMap::AddResult result = m_cachedCollections.fastAdd(namedCollectionKey(collectionType, name), nullptr);
> if (!result.isNewEntry)
>@@ -162,7 +162,7 @@ public:
> }
> 
> template <class NodeListType>
>- void removeCacheWithAtomicName(NodeListType* list, const AtomicString& name = starAtom())
>+ void removeCacheWithAtomicName(NodeListType* list, const AtomString& name = starAtom())
> {
> ASSERT(list == m_atomicNameCaches.get(namedNodeListKey<NodeListType>(name)));
> if (deleteThisAndUpdateNodeRareDataIfAboutToRemoveLastList(list->ownerNode()))
>@@ -170,7 +170,7 @@ public:
> m_atomicNameCaches.remove(namedNodeListKey<NodeListType>(name));
> }
> 
>- void removeCachedTagCollectionNS(HTMLCollection& collection, const AtomicString& namespaceURI, const AtomicString& localName)
>+ void removeCachedTagCollectionNS(HTMLCollection& collection, const AtomString& namespaceURI, const AtomString& localName)
> {
> QualifiedName name(nullAtom(), localName, namespaceURI);
> ASSERT(&collection == m_tagCollectionNSCache.get(name));
>@@ -179,7 +179,7 @@ public:
> m_tagCollectionNSCache.remove(name);
> }
> 
>- void removeCachedCollection(HTMLCollection* collection, const AtomicString& name = starAtom())
>+ void removeCachedCollection(HTMLCollection* collection, const AtomString& name = starAtom())
> {
> ASSERT(collection == m_cachedCollections.get(namedCollectionKey(collection->type(), name)));
> if (deleteThisAndUpdateNodeRareDataIfAboutToRemoveLastList(collection->ownerNode()))
>@@ -215,15 +215,15 @@ public:
> }
> 
> private:
>- std::pair<unsigned char, AtomicString> namedCollectionKey(CollectionType type, const AtomicString& name)
>+ std::pair<unsigned char, AtomString> namedCollectionKey(CollectionType type, const AtomString& name)
> {
>- return std::pair<unsigned char, AtomicString>(type, name);
>+ return std::pair<unsigned char, AtomString>(type, name);
> }
> 
> template <class NodeListType>
>- std::pair<unsigned char, AtomicString> namedNodeListKey(const AtomicString& name)
>+ std::pair<unsigned char, AtomString> namedNodeListKey(const AtomString& name)
> {
>- return std::pair<unsigned char, AtomicString>(NodeListTypeIdentifier<NodeListType>::value(), name);
>+ return std::pair<unsigned char, AtomString>(NodeListTypeIdentifier<NodeListType>::value(), name);
> }
> 
> bool deleteThisAndUpdateNodeRareDataIfAboutToRemoveLastList(Node&);
>diff --git a/Source/WebCore/dom/NonElementParentNode.idl b/Source/WebCore/dom/NonElementParentNode.idl
>index 92238703f2ad73ff7488a4553657a3b702e190bc..7329d31a9731a607a028082bad054cdac835cfdd 100644
>--- a/Source/WebCore/dom/NonElementParentNode.idl
>+++ b/Source/WebCore/dom/NonElementParentNode.idl
>@@ -28,5 +28,5 @@
> [
> NoInterfaceObject,
> ] interface NonElementParentNode {
>- [DOMJIT=ReadDOM] Element? getElementById([RequiresExistingAtomicString] DOMString elementId);
>+ [DOMJIT=ReadDOM] Element? getElementById([RequiresExistingAtomString] DOMString elementId);
> };
>diff --git a/Source/WebCore/dom/OverflowEvent.cpp b/Source/WebCore/dom/OverflowEvent.cpp
>index 8c53ad4acc6090f6221d98842e9bb79dd3715d57..48f956db1a5633fe4c9c53c4bf223ca39b46f59e 100644
>--- a/Source/WebCore/dom/OverflowEvent.cpp
>+++ b/Source/WebCore/dom/OverflowEvent.cpp
>@@ -52,7 +52,7 @@ OverflowEvent::OverflowEvent(bool horizontalOverflowChanged, bool horizontalOver
> m_orient = VERTICAL;
> }
> 
>-OverflowEvent::OverflowEvent(const AtomicString& type, const Init& initializer, IsTrusted isTrusted)
>+OverflowEvent::OverflowEvent(const AtomString& type, const Init& initializer, IsTrusted isTrusted)
> : Event(type, initializer, isTrusted)
> , m_orient(initializer.orient)
> , m_horizontalOverflow(initializer.horizontalOverflow)
>diff --git a/Source/WebCore/dom/OverflowEvent.h b/Source/WebCore/dom/OverflowEvent.h
>index f2da99578e3bc46b5feba27478165ffafbd45e3e..62c8f98e077e111e5140884579c8c9faf931fa4a 100644
>--- a/Source/WebCore/dom/OverflowEvent.h
>+++ b/Source/WebCore/dom/OverflowEvent.h
>@@ -53,7 +53,7 @@ public:
> bool verticalOverflow { false };
> };
> 
>- static Ref<OverflowEvent> create(const AtomicString& type, const Init& initializer, IsTrusted isTrusted = IsTrusted::No)
>+ static Ref<OverflowEvent> create(const AtomString& type, const Init& initializer, IsTrusted isTrusted = IsTrusted::No)
> {
> return adoptRef(*new OverflowEvent(type, initializer, isTrusted));
> }
>@@ -69,7 +69,7 @@ public:
> private:
> OverflowEvent();
> OverflowEvent(bool horizontalOverflowChanged, bool horizontalOverflow, bool verticalOverflowChanged, bool verticalOverflow);
>- OverflowEvent(const AtomicString&, const Init&, IsTrusted);
>+ OverflowEvent(const AtomString&, const Init&, IsTrusted);
> 
> unsigned short m_orient;
> bool m_horizontalOverflow;
>diff --git a/Source/WebCore/dom/PageTransitionEvent.cpp b/Source/WebCore/dom/PageTransitionEvent.cpp
>index 08089d4ef890d1baa98a85898b41dfa5ee883c03..0602c1f4cb59f440597b86d479d3bb3856607166 100644
>--- a/Source/WebCore/dom/PageTransitionEvent.cpp
>+++ b/Source/WebCore/dom/PageTransitionEvent.cpp
>@@ -28,13 +28,13 @@
> 
> namespace WebCore {
> 
>-PageTransitionEvent::PageTransitionEvent(const AtomicString& type, bool persisted)
>+PageTransitionEvent::PageTransitionEvent(const AtomString& type, bool persisted)
> : Event(type, CanBubble::Yes, IsCancelable::Yes)
> , m_persisted(persisted)
> {
> }
> 
>-PageTransitionEvent::PageTransitionEvent(const AtomicString& type, const Init& initializer, IsTrusted isTrusted)
>+PageTransitionEvent::PageTransitionEvent(const AtomString& type, const Init& initializer, IsTrusted isTrusted)
> : Event(type, initializer, isTrusted)
> , m_persisted(initializer.persisted)
> {
>diff --git a/Source/WebCore/dom/PageTransitionEvent.h b/Source/WebCore/dom/PageTransitionEvent.h
>index 8442fa613ef0958fe39da02a344760755c086168..333083e26e4c2ed4929dc616ad063088571d3f8d 100644
>--- a/Source/WebCore/dom/PageTransitionEvent.h
>+++ b/Source/WebCore/dom/PageTransitionEvent.h
>@@ -31,7 +31,7 @@ namespace WebCore {
> 
> class PageTransitionEvent final : public Event {
> public:
>- static Ref<PageTransitionEvent> create(const AtomicString& type, bool persisted)
>+ static Ref<PageTransitionEvent> create(const AtomString& type, bool persisted)
> {
> return adoptRef(*new PageTransitionEvent(type, persisted));
> }
>@@ -40,7 +40,7 @@ public:
> bool persisted { false };
> };
> 
>- static Ref<PageTransitionEvent> create(const AtomicString& type, const Init& initializer, IsTrusted isTrusted = IsTrusted::No)
>+ static Ref<PageTransitionEvent> create(const AtomString& type, const Init& initializer, IsTrusted isTrusted = IsTrusted::No)
> {
> return adoptRef(*new PageTransitionEvent(type, initializer, isTrusted));
> }
>@@ -52,8 +52,8 @@ public:
> bool persisted() const { return m_persisted; }
> 
> private:
>- PageTransitionEvent(const AtomicString& type, bool persisted);
>- PageTransitionEvent(const AtomicString&, const Init&, IsTrusted);
>+ PageTransitionEvent(const AtomString& type, bool persisted);
>+ PageTransitionEvent(const AtomString&, const Init&, IsTrusted);
> 
> bool m_persisted;
> };
>diff --git a/Source/WebCore/dom/PointerEvent.cpp b/Source/WebCore/dom/PointerEvent.cpp
>index 01150983bc5592ebc00b6eff2049d2d128763ed6..3d218af01b39fde6e69a98466aed9972373bd903 100644
>--- a/Source/WebCore/dom/PointerEvent.cpp
>+++ b/Source/WebCore/dom/PointerEvent.cpp
>@@ -50,7 +50,7 @@ const String& PointerEvent::touchPointerType()
> return touchType;
> }
> 
>-static AtomicString pointerEventType(const AtomicString& mouseEventType)
>+static AtomString pointerEventType(const AtomString& mouseEventType)
> {
> auto& names = eventNames();
> if (mouseEventType == names.mousedownEvent)
>@@ -92,7 +92,7 @@ Ref<PointerEvent> PointerEvent::create(const String& type, PointerID pointerId,
> 
> PointerEvent::PointerEvent() = default;
> 
>-PointerEvent::PointerEvent(const AtomicString& type, Init&& initializer)
>+PointerEvent::PointerEvent(const AtomString& type, Init&& initializer)
> : MouseEvent(type, initializer)
> , m_pointerId(initializer.pointerId)
> , m_width(initializer.width)
>@@ -107,13 +107,13 @@ PointerEvent::PointerEvent(const AtomicString& type, Init&& initializer)
> {
> }
> 
>-PointerEvent::PointerEvent(const AtomicString& type, short button, const MouseEvent& mouseEvent)
>+PointerEvent::PointerEvent(const AtomString& type, short button, const MouseEvent& mouseEvent)
> : MouseEvent(type, typeCanBubble(type), typeIsCancelable(type), typeIsComposed(type), mouseEvent.view(), mouseEvent.detail(), mouseEvent.screenLocation(), { mouseEvent.clientX(), mouseEvent.clientY() }, mouseEvent.modifierKeys(), button, mouseEvent.buttons(), mouseEvent.syntheticClickType(), mouseEvent.relatedTarget())
> , m_isPrimary(true)
> {
> }
> 
>-PointerEvent::PointerEvent(const AtomicString& type, PointerID pointerId, const String& pointerType, IsPrimary isPrimary)
>+PointerEvent::PointerEvent(const AtomString& type, PointerID pointerId, const String& pointerType, IsPrimary isPrimary)
> : MouseEvent(type, typeCanBubble(type), typeIsCancelable(type), typeIsComposed(type), nullptr, 0, { }, { }, { }, 0, 0, 0, nullptr)
> , m_pointerId(pointerId)
> , m_pointerType(pointerType)
>diff --git a/Source/WebCore/dom/PointerEvent.h b/Source/WebCore/dom/PointerEvent.h
>index 1ec736799ccb0c4f7413ca8e6ab63bd7ef47ea0d..f9587fca1543b17e26355e667ab97618c5ce68c5 100644
>--- a/Source/WebCore/dom/PointerEvent.h
>+++ b/Source/WebCore/dom/PointerEvent.h
>@@ -56,12 +56,12 @@ public:
> 
> enum class IsPrimary : uint8_t { No, Yes };
> 
>- static Ref<PointerEvent> create(const AtomicString& type, Init&& initializer)
>+ static Ref<PointerEvent> create(const AtomString& type, Init&& initializer)
> {
> return adoptRef(*new PointerEvent(type, WTFMove(initializer)));
> }
> 
>- static Ref<PointerEvent> createForPointerCapture(const AtomicString& type, const PointerEvent& pointerEvent)
>+ static Ref<PointerEvent> createForPointerCapture(const AtomString& type, const PointerEvent& pointerEvent)
> {
> Init initializer;
> initializer.bubbles = true;
>@@ -115,17 +115,17 @@ public:
> EventInterface eventInterface() const override;
> 
> private:
>- static bool typeIsEnterOrLeave(const AtomicString& type) { return type == eventNames().pointerenterEvent || type == eventNames().pointerleaveEvent; }
>- static CanBubble typeCanBubble(const AtomicString& type) { return typeIsEnterOrLeave(type) ? CanBubble::No : CanBubble::Yes; }
>- static IsCancelable typeIsCancelable(const AtomicString& type) { return typeIsEnterOrLeave(type) ? IsCancelable::No : IsCancelable::Yes; }
>- static IsComposed typeIsComposed(const AtomicString& type) { return typeIsEnterOrLeave(type) ? IsComposed::No : IsComposed::Yes; }
>+ static bool typeIsEnterOrLeave(const AtomString& type) { return type == eventNames().pointerenterEvent || type == eventNames().pointerleaveEvent; }
>+ static CanBubble typeCanBubble(const AtomString& type) { return typeIsEnterOrLeave(type) ? CanBubble::No : CanBubble::Yes; }
>+ static IsCancelable typeIsCancelable(const AtomString& type) { return typeIsEnterOrLeave(type) ? IsCancelable::No : IsCancelable::Yes; }
>+ static IsComposed typeIsComposed(const AtomString& type) { return typeIsEnterOrLeave(type) ? IsComposed::No : IsComposed::Yes; }
> 
> PointerEvent();
>- PointerEvent(const AtomicString&, Init&&);
>- PointerEvent(const AtomicString& type, short button, const MouseEvent&);
>- PointerEvent(const AtomicString& type, PointerID, const String& pointerType, IsPrimary);
>+ PointerEvent(const AtomString&, Init&&);
>+ PointerEvent(const AtomString& type, short button, const MouseEvent&);
>+ PointerEvent(const AtomString& type, PointerID, const String& pointerType, IsPrimary);
> #if ENABLE(TOUCH_EVENTS) && PLATFORM(IOS_FAMILY)
>- PointerEvent(const AtomicString& type, const PlatformTouchEvent&, IsCancelable isCancelable, unsigned touchIndex, bool isPrimary, Ref<WindowProxy>&&);
>+ PointerEvent(const AtomString& type, const PlatformTouchEvent&, IsCancelable isCancelable, unsigned touchIndex, bool isPrimary, Ref<WindowProxy>&&);
> #endif
> 
> PointerID m_pointerId { mousePointerID };
>diff --git a/Source/WebCore/dom/PopStateEvent.cpp b/Source/WebCore/dom/PopStateEvent.cpp
>index 3ad0c4f79c79966ffa8fdcba526606e1e8564f40..d1dafd07948dbce364b560acfa2fd4cefafe41a5 100644
>--- a/Source/WebCore/dom/PopStateEvent.cpp
>+++ b/Source/WebCore/dom/PopStateEvent.cpp
>@@ -33,7 +33,7 @@
> 
> namespace WebCore {
> 
>-PopStateEvent::PopStateEvent(const AtomicString& type, const Init& initializer, IsTrusted isTrusted)
>+PopStateEvent::PopStateEvent(const AtomString& type, const Init& initializer, IsTrusted isTrusted)
> : Event(type, initializer, isTrusted)
> , m_state(initializer.state)
> {
>@@ -53,7 +53,7 @@ Ref<PopStateEvent> PopStateEvent::create(RefPtr<SerializedScriptValue>&& seriali
> return adoptRef(*new PopStateEvent(WTFMove(serializedState), history));
> }
> 
>-Ref<PopStateEvent> PopStateEvent::create(const AtomicString& type, const Init& initializer, IsTrusted isTrusted)
>+Ref<PopStateEvent> PopStateEvent::create(const AtomString& type, const Init& initializer, IsTrusted isTrusted)
> {
> return adoptRef(*new PopStateEvent(type, initializer, isTrusted));
> }
>diff --git a/Source/WebCore/dom/PopStateEvent.h b/Source/WebCore/dom/PopStateEvent.h
>index d7d1e48c9756eff1c78ae21915b81893dbfdd369..567e456acd5ab06a217ae20edc4f49e071323b8a 100644
>--- a/Source/WebCore/dom/PopStateEvent.h
>+++ b/Source/WebCore/dom/PopStateEvent.h
>@@ -43,7 +43,7 @@ public:
> JSC::JSValue state;
> };
> 
>- static Ref<PopStateEvent> create(const AtomicString&, const Init&, IsTrusted = IsTrusted::No);
>+ static Ref<PopStateEvent> create(const AtomString&, const Init&, IsTrusted = IsTrusted::No);
> static Ref<PopStateEvent> createForBindings();
> 
> const JSValueInWrappedObject& state() const { return m_state; }
>@@ -55,7 +55,7 @@ public:
> 
> private:
> PopStateEvent() = default;
>- PopStateEvent(const AtomicString&, const Init&, IsTrusted);
>+ PopStateEvent(const AtomString&, const Init&, IsTrusted);
> PopStateEvent(RefPtr<SerializedScriptValue>&&, History*);
> 
> EventInterface eventInterface() const final;
>diff --git a/Source/WebCore/dom/ProgressEvent.cpp b/Source/WebCore/dom/ProgressEvent.cpp
>index a13708b80463603f11f7ec1c90a07bddd059a202..8223ab4cbe27f898bf3734ebd253372904ce504c 100644
>--- a/Source/WebCore/dom/ProgressEvent.cpp
>+++ b/Source/WebCore/dom/ProgressEvent.cpp
>@@ -28,7 +28,7 @@
> 
> namespace WebCore {
> 
>-ProgressEvent::ProgressEvent(const AtomicString& type, const Init& initializer, IsTrusted isTrusted)
>+ProgressEvent::ProgressEvent(const AtomString& type, const Init& initializer, IsTrusted isTrusted)
> : Event(type, initializer, isTrusted)
> , m_lengthComputable(initializer.lengthComputable)
> , m_loaded(initializer.loaded)
>@@ -36,7 +36,7 @@ ProgressEvent::ProgressEvent(const AtomicString& type, const Init& initializer,
> {
> }
> 
>-ProgressEvent::ProgressEvent(const AtomicString& type, bool lengthComputable, unsigned long long loaded, unsigned long long total)
>+ProgressEvent::ProgressEvent(const AtomString& type, bool lengthComputable, unsigned long long loaded, unsigned long long total)
> : Event(type, CanBubble::No, IsCancelable::No)
> , m_lengthComputable(lengthComputable)
> , m_loaded(loaded)
>diff --git a/Source/WebCore/dom/ProgressEvent.h b/Source/WebCore/dom/ProgressEvent.h
>index ffabcb8b1d0d764296960d3a17704b1d57f77d6f..b696ebf85b1f3d8d43ce5f932e735f758294105a 100644
>--- a/Source/WebCore/dom/ProgressEvent.h
>+++ b/Source/WebCore/dom/ProgressEvent.h
>@@ -31,7 +31,7 @@ namespace WebCore {
> 
> class ProgressEvent : public Event {
> public:
>- static Ref<ProgressEvent> create(const AtomicString& type, bool lengthComputable, unsigned long long loaded, unsigned long long total)
>+ static Ref<ProgressEvent> create(const AtomString& type, bool lengthComputable, unsigned long long loaded, unsigned long long total)
> {
> return adoptRef(*new ProgressEvent(type, lengthComputable, loaded, total));
> }
>@@ -42,7 +42,7 @@ public:
> unsigned long long total { 0 };
> };
> 
>- static Ref<ProgressEvent> create(const AtomicString& type, const Init& initializer, IsTrusted isTrusted = IsTrusted::No)
>+ static Ref<ProgressEvent> create(const AtomString& type, const Init& initializer, IsTrusted isTrusted = IsTrusted::No)
> {
> return adoptRef(*new ProgressEvent(type, initializer, isTrusted));
> }
>@@ -54,8 +54,8 @@ public:
> EventInterface eventInterface() const override;
> 
> protected:
>- ProgressEvent(const AtomicString& type, bool lengthComputable, unsigned long long loaded, unsigned long long total);
>- ProgressEvent(const AtomicString&, const Init&, IsTrusted);
>+ ProgressEvent(const AtomString& type, bool lengthComputable, unsigned long long loaded, unsigned long long total);
>+ ProgressEvent(const AtomString&, const Init&, IsTrusted);
> 
> private:
> bool m_lengthComputable;
>diff --git a/Source/WebCore/dom/PromiseRejectionEvent.cpp b/Source/WebCore/dom/PromiseRejectionEvent.cpp
>index 451d6288b44110f54488b70f10476835a8223be3..7cd0ab17af88718c5b462dab55359374a738f20e 100644
>--- a/Source/WebCore/dom/PromiseRejectionEvent.cpp
>+++ b/Source/WebCore/dom/PromiseRejectionEvent.cpp
>@@ -34,7 +34,7 @@
> namespace WebCore {
> using namespace JSC;
> 
>-PromiseRejectionEvent::PromiseRejectionEvent(const AtomicString& type, const Init& initializer, IsTrusted isTrusted)
>+PromiseRejectionEvent::PromiseRejectionEvent(const AtomString& type, const Init& initializer, IsTrusted isTrusted)
> : Event(type, initializer, isTrusted)
> , m_promise(*(initializer.promise))
> , m_reason(initializer.reason)
>diff --git a/Source/WebCore/dom/PromiseRejectionEvent.h b/Source/WebCore/dom/PromiseRejectionEvent.h
>index 2dc7d8555dbfce12effc6b9fd7228c35ece758b3..6f4ca507bd6e535e25ad5d1733e005fcff685984 100644
>--- a/Source/WebCore/dom/PromiseRejectionEvent.h
>+++ b/Source/WebCore/dom/PromiseRejectionEvent.h
>@@ -39,7 +39,7 @@ public:
> JSC::JSValue reason;
> };
> 
>- static Ref<PromiseRejectionEvent> create(const AtomicString& type, const Init& initializer, IsTrusted isTrusted = IsTrusted::No)
>+ static Ref<PromiseRejectionEvent> create(const AtomString& type, const Init& initializer, IsTrusted isTrusted = IsTrusted::No)
> {
> return adoptRef(*new PromiseRejectionEvent(type, initializer, isTrusted));
> }
>@@ -52,7 +52,7 @@ public:
> EventInterface eventInterface() const override { return PromiseRejectionEventInterfaceType; }
> 
> private:
>- PromiseRejectionEvent(const AtomicString&, const Init&, IsTrusted);
>+ PromiseRejectionEvent(const AtomString&, const Init&, IsTrusted);
> 
> Ref<DOMPromise> m_promise;
> JSValueInWrappedObject m_reason;
>diff --git a/Source/WebCore/dom/QualifiedName.cpp b/Source/WebCore/dom/QualifiedName.cpp
>index 986292ff951cb4ffac1ada6a5798601682b5cd3e..46a95666bca66eeac479a5c1f17c3b7a32727bbd 100644
>--- a/Source/WebCore/dom/QualifiedName.cpp
>+++ b/Source/WebCore/dom/QualifiedName.cpp
>@@ -26,7 +26,7 @@
> 
> namespace WebCore {
> 
>-QualifiedName::QualifiedName(const AtomicString& p, const AtomicString& l, const AtomicString& n)
>+QualifiedName::QualifiedName(const AtomString& p, const AtomString& l, const AtomString& n)
> : m_impl(threadGlobalData().qualifiedNameCache().getOrCreate(QualifiedNameComponents { p.impl(), l.impl(), n.isEmpty() ? nullptr : n.impl() }))
> {
> }
>@@ -45,7 +45,7 @@ void QualifiedName::init()
> if (initialized)
> return;
> 
>- ASSERT_WITH_MESSAGE(WTF::nullAtomData.isConstructed(), "AtomicString::init should have been called");
>+ ASSERT_WITH_MESSAGE(WTF::nullAtomData.isConstructed(), "AtomString::init should have been called");
> anyName.construct(nullAtom(), starAtom(), starAtom());
> initialized = true;
> }
>@@ -56,7 +56,7 @@ const QualifiedName& nullQName()
> return nullName;
> }
> 
>-const AtomicString& QualifiedName::localNameUpper() const
>+const AtomString& QualifiedName::localNameUpper() const
> {
> if (!m_impl->m_localNameUpper)
> m_impl->m_localNameUpper = m_impl->m_localName.convertToASCIIUppercase();
>diff --git a/Source/WebCore/dom/QualifiedName.h b/Source/WebCore/dom/QualifiedName.h
>index 8b762e5e89f78d24f17e8f8049106d27b1985d7e..20f1244158bacfeb9ebebb81f98624f65022ef4d 100644
>--- a/Source/WebCore/dom/QualifiedName.h
>+++ b/Source/WebCore/dom/QualifiedName.h
>@@ -22,7 +22,7 @@
> 
> #include <wtf/HashTraits.h>
> #include <wtf/NeverDestroyed.h>
>-#include <wtf/text/AtomicString.h>
>+#include <wtf/text/AtomString.h>
> 
> namespace WebCore {
> 
>@@ -37,7 +37,7 @@ class QualifiedName {
> public:
> class QualifiedNameImpl : public RefCounted<QualifiedNameImpl> {
> public:
>- static Ref<QualifiedNameImpl> create(const AtomicString& prefix, const AtomicString& localName, const AtomicString& namespaceURI)
>+ static Ref<QualifiedNameImpl> create(const AtomString& prefix, const AtomString& localName, const AtomString& namespaceURI)
> {
> return adoptRef(*new QualifiedNameImpl(prefix, localName, namespaceURI));
> }
>@@ -47,10 +47,10 @@ public:
> unsigned computeHash() const;
> 
> mutable unsigned m_existingHash { 0 };
>- const AtomicString m_prefix;
>- const AtomicString m_localName;
>- const AtomicString m_namespace;
>- mutable AtomicString m_localNameUpper;
>+ const AtomString m_prefix;
>+ const AtomString m_localName;
>+ const AtomString m_namespace;
>+ mutable AtomString m_localNameUpper;
> 
> #if ENABLE(JIT)
> static ptrdiff_t localNameMemoryOffset() { return OBJECT_OFFSETOF(QualifiedNameImpl, m_localName); }
>@@ -58,7 +58,7 @@ public:
> #endif
> 
> private:
>- QualifiedNameImpl(const AtomicString& prefix, const AtomicString& localName, const AtomicString& namespaceURI)
>+ QualifiedNameImpl(const AtomString& prefix, const AtomString& localName, const AtomString& namespaceURI)
> : m_prefix(prefix)
> , m_localName(localName)
> , m_namespace(namespaceURI)
>@@ -67,7 +67,7 @@ public:
> } 
> };
> 
>- WEBCORE_EXPORT QualifiedName(const AtomicString& prefix, const AtomicString& localName, const AtomicString& namespaceURI);
>+ WEBCORE_EXPORT QualifiedName(const AtomString& prefix, const AtomString& localName, const AtomString& namespaceURI);
> explicit QualifiedName(WTF::HashTableDeletedValueType) : m_impl(WTF::HashTableDeletedValue) { }
> bool isHashTableDeletedValue() const { return m_impl.isHashTableDeletedValue(); }
> #ifdef QNAME_DEFAULT_CONSTRUCTOR
>@@ -80,14 +80,14 @@ public:
> bool matches(const QualifiedName& other) const { return m_impl == other.m_impl || (localName() == other.localName() && namespaceURI() == other.namespaceURI()); }
> 
> bool hasPrefix() const { return !m_impl->m_prefix.isNull(); }
>- void setPrefix(const AtomicString& prefix) { *this = QualifiedName(prefix, localName(), namespaceURI()); }
>+ void setPrefix(const AtomString& prefix) { *this = QualifiedName(prefix, localName(), namespaceURI()); }
> 
>- const AtomicString& prefix() const { return m_impl->m_prefix; }
>- const AtomicString& localName() const { return m_impl->m_localName; }
>- const AtomicString& namespaceURI() const { return m_impl->m_namespace; }
>+ const AtomString& prefix() const { return m_impl->m_prefix; }
>+ const AtomString& localName() const { return m_impl->m_localName; }
>+ const AtomString& namespaceURI() const { return m_impl->m_namespace; }
> 
> // Uppercased localName, cached for efficiency
>- const AtomicString& localNameUpper() const;
>+ const AtomString& localNameUpper() const;
> 
> String toString() const;
> 
>@@ -110,10 +110,10 @@ inline const QualifiedName& anyQName() { return anyName; }
> 
> const QualifiedName& nullQName();
> 
>-inline bool operator==(const AtomicString& a, const QualifiedName& q) { return a == q.localName(); }
>-inline bool operator!=(const AtomicString& a, const QualifiedName& q) { return a != q.localName(); }
>-inline bool operator==(const QualifiedName& q, const AtomicString& a) { return a == q.localName(); }
>-inline bool operator!=(const QualifiedName& q, const AtomicString& a) { return a != q.localName(); }
>+inline bool operator==(const AtomString& a, const QualifiedName& q) { return a == q.localName(); }
>+inline bool operator!=(const AtomString& a, const QualifiedName& q) { return a != q.localName(); }
>+inline bool operator==(const QualifiedName& q, const AtomString& a) { return a == q.localName(); }
>+inline bool operator!=(const QualifiedName& q, const AtomString& a) { return a != q.localName(); }
> 
> inline unsigned hashComponents(const QualifiedNameComponents& buf)
> {
>diff --git a/Source/WebCore/dom/RadioButtonGroups.cpp b/Source/WebCore/dom/RadioButtonGroups.cpp
>index 2f305ef681d20b48da5715beb285e227604496f3..5337c58cdfbbaab230184502638dc63449f796ac 100644
>--- a/Source/WebCore/dom/RadioButtonGroups.cpp
>+++ b/Source/WebCore/dom/RadioButtonGroups.cpp
>@@ -249,7 +249,7 @@ void RadioButtonGroups::requiredStateChanged(HTMLInputElement& element)
> group->requiredStateChanged(element);
> }
> 
>-HTMLInputElement* RadioButtonGroups::checkedButtonForGroup(const AtomicString& name) const
>+HTMLInputElement* RadioButtonGroups::checkedButtonForGroup(const AtomString& name) const
> {
> if (!m_nameToGroupMap)
> return nullptr;
>@@ -261,7 +261,7 @@ HTMLInputElement* RadioButtonGroups::checkedButtonForGroup(const AtomicString& n
> bool RadioButtonGroups::hasCheckedButton(const HTMLInputElement& element) const
> {
> ASSERT(element.isRadioButton());
>- const AtomicString& name = element.name();
>+ const AtomString& name = element.name();
> if (name.isEmpty() || !m_nameToGroupMap)
> return element.checked();
> return m_nameToGroupMap->get(name.impl())->checkedButton();
>@@ -294,7 +294,7 @@ void RadioButtonGroups::removeButton(HTMLInputElement& element)
> if (it->value->isEmpty()) {
> // FIXME: We may skip deallocating the empty RadioButtonGroup for
> // performance improvement. If we do so, we need to change the key type
>- // of m_nameToGroupMap from AtomicStringImpl* to RefPtr<AtomicStringImpl>.
>+ // of m_nameToGroupMap from AtomStringImpl* to RefPtr<AtomStringImpl>.
> m_nameToGroupMap->remove(it);
> if (m_nameToGroupMap->isEmpty())
> m_nameToGroupMap = nullptr;
>diff --git a/Source/WebCore/dom/RadioButtonGroups.h b/Source/WebCore/dom/RadioButtonGroups.h
>index 4b284509142fc23d006c68ead564be4e18683664..26f1f7137f53929eb84b7064e5feb86f1741fa64 100644
>--- a/Source/WebCore/dom/RadioButtonGroups.h
>+++ b/Source/WebCore/dom/RadioButtonGroups.h
>@@ -38,13 +38,13 @@ public:
> void updateCheckedState(HTMLInputElement&);
> void requiredStateChanged(HTMLInputElement&);
> void removeButton(HTMLInputElement&);
>- HTMLInputElement* checkedButtonForGroup(const AtomicString& groupName) const;
>+ HTMLInputElement* checkedButtonForGroup(const AtomString& groupName) const;
> bool hasCheckedButton(const HTMLInputElement&) const;
> bool isInRequiredGroup(HTMLInputElement&) const;
> Vector<HTMLInputElement*> groupMembers(const HTMLInputElement&) const;
> 
> private:
>- typedef HashMap<AtomicStringImpl*, std::unique_ptr<RadioButtonGroup>> NameToGroupMap;
>+ typedef HashMap<AtomStringImpl*, std::unique_ptr<RadioButtonGroup>> NameToGroupMap;
> std::unique_ptr<NameToGroupMap> m_nameToGroupMap;
> };
> 
>diff --git a/Source/WebCore/dom/ScriptElementCachedScriptFetcher.h b/Source/WebCore/dom/ScriptElementCachedScriptFetcher.h
>index 03c3896dbed8e462aa9916d8ac7ba68f90ef3fd6..170804e9d87cfcbee545f40a000e7e310a2e7d4d 100644
>--- a/Source/WebCore/dom/ScriptElementCachedScriptFetcher.h
>+++ b/Source/WebCore/dom/ScriptElementCachedScriptFetcher.h
>@@ -39,7 +39,7 @@ public:
> const String& crossOriginMode() const { return m_crossOriginMode; }
> 
> protected:
>- ScriptElementCachedScriptFetcher(const String& nonce, const String& crossOriginMode, const String& charset, const AtomicString& initiatorName, bool isInUserAgentShadowTree)
>+ ScriptElementCachedScriptFetcher(const String& nonce, const String& crossOriginMode, const String& charset, const AtomString& initiatorName, bool isInUserAgentShadowTree)
> : CachedScriptFetcher(nonce, charset, initiatorName, isInUserAgentShadowTree)
> , m_crossOriginMode(crossOriginMode)
> {
>diff --git a/Source/WebCore/dom/SecurityPolicyViolationEvent.h b/Source/WebCore/dom/SecurityPolicyViolationEvent.h
>index abdd5c5500711d30d3537f472b41a4fd392eb5b6..3c40b71eb9075c1a00fd87d810a4b74555abddd2 100644
>--- a/Source/WebCore/dom/SecurityPolicyViolationEvent.h
>+++ b/Source/WebCore/dom/SecurityPolicyViolationEvent.h
>@@ -31,7 +31,7 @@ namespace WebCore {
> 
> class SecurityPolicyViolationEvent final : public Event {
> public:
>- static Ref<SecurityPolicyViolationEvent> create(const AtomicString& type, CanBubble canBubble, IsCancelable cancelable, const String& documentURI, const String& referrer, const String& blockedURI, const String& violatedDirective, const String& effectiveDirective, const String& originalPolicy, const String& sourceFile, unsigned short statusCode, int lineNumber, int columnNumber)
>+ static Ref<SecurityPolicyViolationEvent> create(const AtomString& type, CanBubble canBubble, IsCancelable cancelable, const String& documentURI, const String& referrer, const String& blockedURI, const String& violatedDirective, const String& effectiveDirective, const String& originalPolicy, const String& sourceFile, unsigned short statusCode, int lineNumber, int columnNumber)
> {
> return adoptRef(*new SecurityPolicyViolationEvent(type, canBubble, cancelable, documentURI, referrer, blockedURI, violatedDirective, effectiveDirective, originalPolicy, sourceFile, statusCode, lineNumber, columnNumber));
> }
>@@ -57,7 +57,7 @@ public:
> template<class Decoder> static bool decode(Decoder&, Init&);
> };
> 
>- static Ref<SecurityPolicyViolationEvent> create(const AtomicString& type, const Init& initializer, IsTrusted isTrusted = IsTrusted::No)
>+ static Ref<SecurityPolicyViolationEvent> create(const AtomString& type, const Init& initializer, IsTrusted isTrusted = IsTrusted::No)
> {
> return adoptRef(*new SecurityPolicyViolationEvent(type, initializer, isTrusted));
> }
>@@ -80,7 +80,7 @@ private:
> {
> }
> 
>- SecurityPolicyViolationEvent(const AtomicString& type, CanBubble canBubble, IsCancelable cancelable, const String& documentURI, const String& referrer, const String& blockedURI, const String& violatedDirective, const String& effectiveDirective, const String& originalPolicy, const String& sourceFile, unsigned short statusCode, int lineNumber, int columnNumber)
>+ SecurityPolicyViolationEvent(const AtomString& type, CanBubble canBubble, IsCancelable cancelable, const String& documentURI, const String& referrer, const String& blockedURI, const String& violatedDirective, const String& effectiveDirective, const String& originalPolicy, const String& sourceFile, unsigned short statusCode, int lineNumber, int columnNumber)
> : Event(type, canBubble, cancelable)
> , m_documentURI(documentURI)
> , m_referrer(referrer)
>@@ -95,7 +95,7 @@ private:
> {
> }
> 
>- SecurityPolicyViolationEvent(const AtomicString& type, const Init& initializer, IsTrusted isTrusted)
>+ SecurityPolicyViolationEvent(const AtomString& type, const Init& initializer, IsTrusted isTrusted)
> : Event(type, initializer, isTrusted)
> , m_documentURI(initializer.documentURI)
> , m_referrer(initializer.referrer)
>diff --git a/Source/WebCore/dom/SelectorQuery.cpp b/Source/WebCore/dom/SelectorQuery.cpp
>index acec1c206111e3fdd6bcba38a83288ed202da3a7..55dc2c87a4ac202d71adda66d596b5fea0bc8856 100644
>--- a/Source/WebCore/dom/SelectorQuery.cpp
>+++ b/Source/WebCore/dom/SelectorQuery.cpp
>@@ -221,7 +221,7 @@ ALWAYS_INLINE void SelectorDataList::executeFastPathForIdSelector(const Containe
> ASSERT(m_selectors.size() == 1);
> ASSERT(idSelector);
> 
>- const AtomicString& idToMatch = idSelector->value();
>+ const AtomString& idToMatch = idSelector->value();
> if (UNLIKELY(rootNode.treeScope().containsMultipleElementsWithId(idToMatch))) {
> const Vector<Element*>* elements = rootNode.treeScope().getAllElementsById(idToMatch);
> ASSERT(elements);
>@@ -263,7 +263,7 @@ static ContainerNode& filterRootById(ContainerNode& rootNode, const CSSSelector&
> bool inAdjacentChain = false;
> for (; selector; selector = selector->tagHistory()) {
> if (canBeUsedForIdFastPath(*selector)) {
>- const AtomicString& idToMatch = selector->value();
>+ const AtomString& idToMatch = selector->value();
> if (ContainerNode* searchRoot = rootNode.treeScope().getElementById(idToMatch)) {
> if (LIKELY(!rootNode.treeScope().containsMultipleElementsWithId(idToMatch))) {
> if (inAdjacentChain)
>@@ -283,7 +283,7 @@ static ContainerNode& filterRootById(ContainerNode& rootNode, const CSSSelector&
> return rootNode;
> }
> 
>-static ALWAYS_INLINE bool localNameMatches(const Element& element, const AtomicString& localName, const AtomicString& lowercaseLocalName)
>+static ALWAYS_INLINE bool localNameMatches(const Element& element, const AtomString& localName, const AtomString& lowercaseLocalName)
> {
> if (element.isHTMLElement() && element.document().isHTMLDocument())
> return element.localName() == lowercaseLocalName;
>@@ -292,7 +292,7 @@ static ALWAYS_INLINE bool localNameMatches(const Element& element, const AtomicS
> }
> 
> template <typename SelectorQueryTrait>
>-static inline void elementsForLocalName(const ContainerNode& rootNode, const AtomicString& localName, const AtomicString& lowercaseLocalName, typename SelectorQueryTrait::OutputType& output)
>+static inline void elementsForLocalName(const ContainerNode& rootNode, const AtomString& localName, const AtomString& lowercaseLocalName, typename SelectorQueryTrait::OutputType& output)
> {
> if (localName == lowercaseLocalName) {
> for (auto& element : elementDescendants(const_cast<ContainerNode&>(rootNode))) {
>@@ -331,9 +331,9 @@ ALWAYS_INLINE void SelectorDataList::executeSingleTagNameSelectorData(const Cont
> ASSERT(isSingleTagNameSelector(*selectorData.selector));
> 
> const QualifiedName& tagQualifiedName = selectorData.selector->tagQName();
>- const AtomicString& selectorLocalName = tagQualifiedName.localName();
>- const AtomicString& selectorLowercaseLocalName = selectorData.selector->tagLowercaseLocalName();
>- const AtomicString& selectorNamespaceURI = tagQualifiedName.namespaceURI();
>+ const AtomString& selectorLocalName = tagQualifiedName.localName();
>+ const AtomString& selectorLowercaseLocalName = selectorData.selector->tagLowercaseLocalName();
>+ const AtomString& selectorNamespaceURI = tagQualifiedName.namespaceURI();
> 
> if (selectorNamespaceURI == starAtom()) {
> if (selectorLocalName != starAtom()) {
>@@ -361,7 +361,7 @@ ALWAYS_INLINE void SelectorDataList::executeSingleClassNameSelectorData(const Co
> ASSERT(m_selectors.size() == 1);
> ASSERT(isSingleClassNameSelector(*selectorData.selector));
> 
>- const AtomicString& className = selectorData.selector->value();
>+ const AtomString& className = selectorData.selector->value();
> for (auto& element : elementDescendants(const_cast<ContainerNode&>(rootNode))) {
> if (element.hasClass() && element.classNames().contains(className)) {
> SelectorQueryTrait::appendOutputForElement(output, &element);
>diff --git a/Source/WebCore/dom/SelectorQuery.h b/Source/WebCore/dom/SelectorQuery.h
>index c6a44095ad41522aa7c6323d02630fb702845ae8..0dbf82664803c056c21884a3068d006a227f3eb2 100644
>--- a/Source/WebCore/dom/SelectorQuery.h
>+++ b/Source/WebCore/dom/SelectorQuery.h
>@@ -31,7 +31,7 @@
> #include "SelectorCompiler.h"
> #include <wtf/HashMap.h>
> #include <wtf/Vector.h>
>-#include <wtf/text/AtomicStringHash.h>
>+#include <wtf/text/AtomStringHash.h>
> 
> namespace WebCore {
> 
>diff --git a/Source/WebCore/dom/ShadowRoot.cpp b/Source/WebCore/dom/ShadowRoot.cpp
>index 6e8851e5b80fccb9a1c05c2a9cb1b82d76010739..6963b68379d88f27a84e2f1da6515381805b293c 100644
>--- a/Source/WebCore/dom/ShadowRoot.cpp
>+++ b/Source/WebCore/dom/ShadowRoot.cpp
>@@ -218,13 +218,13 @@ HTMLSlotElement* ShadowRoot::findAssignedSlot(const Node& node)
> return m_slotAssignment->findAssignedSlot(node, *this);
> }
> 
>-void ShadowRoot::renameSlotElement(HTMLSlotElement& slot, const AtomicString& oldName, const AtomicString& newName)
>+void ShadowRoot::renameSlotElement(HTMLSlotElement& slot, const AtomString& oldName, const AtomString& newName)
> {
> ASSERT(m_slotAssignment);
> return m_slotAssignment->renameSlotElement(slot, oldName, newName, *this);
> }
> 
>-void ShadowRoot::addSlotElementByName(const AtomicString& name, HTMLSlotElement& slot)
>+void ShadowRoot::addSlotElementByName(const AtomString& name, HTMLSlotElement& slot)
> {
> ASSERT(&slot.rootNode() == this);
> if (!m_slotAssignment)
>@@ -233,7 +233,7 @@ void ShadowRoot::addSlotElementByName(const AtomicString& name, HTMLSlotElement&
> return m_slotAssignment->addSlotElementByName(name, slot, *this);
> }
> 
>-void ShadowRoot::removeSlotElementByName(const AtomicString& name, HTMLSlotElement& slot, ContainerNode& oldParentOfRemovedTree)
>+void ShadowRoot::removeSlotElementByName(const AtomString& name, HTMLSlotElement& slot, ContainerNode& oldParentOfRemovedTree)
> {
> ASSERT(m_slotAssignment);
> return m_slotAssignment->removeSlotElementByName(name, slot, &oldParentOfRemovedTree, *this);
>diff --git a/Source/WebCore/dom/ShadowRoot.h b/Source/WebCore/dom/ShadowRoot.h
>index 36ef614a0d02b3d853f40eaa4750ba586e184dee..9cbee5a75562e2113cd3e8ceae7a9f9275465779 100644
>--- a/Source/WebCore/dom/ShadowRoot.h
>+++ b/Source/WebCore/dom/ShadowRoot.h
>@@ -75,9 +75,9 @@ public:
> 
> HTMLSlotElement* findAssignedSlot(const Node&);
> 
>- void renameSlotElement(HTMLSlotElement&, const AtomicString& oldName, const AtomicString& newName);
>- void addSlotElementByName(const AtomicString&, HTMLSlotElement&);
>- void removeSlotElementByName(const AtomicString&, HTMLSlotElement&, ContainerNode& oldParentOfRemovedTree);
>+ void renameSlotElement(HTMLSlotElement&, const AtomString& oldName, const AtomString& newName);
>+ void addSlotElementByName(const AtomString&, HTMLSlotElement&);
>+ void removeSlotElementByName(const AtomString&, HTMLSlotElement&, ContainerNode& oldParentOfRemovedTree);
> void slotFallbackDidChange(HTMLSlotElement&);
> void resolveSlotsBeforeNodeInsertionOrRemoval();
> void willRemoveAllChildren(ContainerNode&);
>@@ -85,7 +85,7 @@ public:
> void didRemoveAllChildrenOfShadowHost();
> void didChangeDefaultSlot();
> void hostChildElementDidChange(const Element&);
>- void hostChildElementDidChangeSlotAttribute(Element&, const AtomicString& oldValue, const AtomicString& newValue);
>+ void hostChildElementDidChangeSlotAttribute(Element&, const AtomString& oldValue, const AtomString& newValue);
> 
> const Vector<Node*>* assignedNodesForSlot(const HTMLSlotElement&);
> 
>diff --git a/Source/WebCore/dom/SimulatedClick.cpp b/Source/WebCore/dom/SimulatedClick.cpp
>index 24199c020fcd790788b1d8be76d4c3e7316ec337..05e3abdfa6899fa07a874e509f0b58058a821201 100644
>--- a/Source/WebCore/dom/SimulatedClick.cpp
>+++ b/Source/WebCore/dom/SimulatedClick.cpp
>@@ -39,13 +39,13 @@ namespace WebCore {
> class SimulatedMouseEvent final : public MouseEvent {
> WTF_MAKE_ISO_ALLOCATED_INLINE(SimulatedMouseEvent);
> public:
>- static Ref<SimulatedMouseEvent> create(const AtomicString& eventType, RefPtr<WindowProxy>&& view, RefPtr<Event>&& underlyingEvent, Element& target, SimulatedClickSource source)
>+ static Ref<SimulatedMouseEvent> create(const AtomString& eventType, RefPtr<WindowProxy>&& view, RefPtr<Event>&& underlyingEvent, Element& target, SimulatedClickSource source)
> {
> return adoptRef(*new SimulatedMouseEvent(eventType, WTFMove(view), WTFMove(underlyingEvent), target, source));
> }
> 
> private:
>- SimulatedMouseEvent(const AtomicString& eventType, RefPtr<WindowProxy>&& view, RefPtr<Event>&& underlyingEvent, Element& target, SimulatedClickSource source)
>+ SimulatedMouseEvent(const AtomString& eventType, RefPtr<WindowProxy>&& view, RefPtr<Event>&& underlyingEvent, Element& target, SimulatedClickSource source)
> : MouseEvent(eventType, CanBubble::Yes, IsCancelable::Yes, IsComposed::Yes,
> underlyingEvent ? underlyingEvent->timeStamp() : MonotonicTime::now(), WTFMove(view), /* detail */ 0,
> { }, { }, { }, modifiersFromUnderlyingEvent(underlyingEvent), 0, 0, nullptr, 0, 0, nullptr, IsSimulated::Yes,
>@@ -76,7 +76,7 @@ private:
> }
> };
> 
>-static void simulateMouseEvent(const AtomicString& eventType, Element& element, Event* underlyingEvent, SimulatedClickSource source)
>+static void simulateMouseEvent(const AtomString& eventType, Element& element, Event* underlyingEvent, SimulatedClickSource source)
> {
> element.dispatchEvent(SimulatedMouseEvent::create(eventType, element.document().windowProxy(), underlyingEvent, element, source));
> }
>diff --git a/Source/WebCore/dom/SlotAssignment.cpp b/Source/WebCore/dom/SlotAssignment.cpp
>index e39cfd49cdfdb9df20989a657642227a073bc3c1..a419dda528accbda6de9ddf1a54864cfdf9160ef 100644
>--- a/Source/WebCore/dom/SlotAssignment.cpp
>+++ b/Source/WebCore/dom/SlotAssignment.cpp
>@@ -35,12 +35,12 @@ namespace WebCore {
> 
> using namespace HTMLNames;
> 
>-static const AtomicString& slotNameFromAttributeValue(const AtomicString& value)
>+static const AtomString& slotNameFromAttributeValue(const AtomString& value)
> {
> return value == nullAtom() ? SlotAssignment::defaultSlotName() : value;
> }
> 
>-static const AtomicString& slotNameFromSlotAttribute(const Node& child)
>+static const AtomString& slotNameFromSlotAttribute(const Node& child)
> {
> if (is<Text>(child))
> return SlotAssignment::defaultSlotName();
>@@ -49,7 +49,7 @@ static const AtomicString& slotNameFromSlotAttribute(const Node& child)
> }
> 
> #if !ASSERT_DISABLED
>-static HTMLSlotElement* findSlotElement(ShadowRoot& shadowRoot, const AtomicString& slotName)
>+static HTMLSlotElement* findSlotElement(ShadowRoot& shadowRoot, const AtomString& slotName)
> {
> for (auto& slotElement : descendantsOfType<HTMLSlotElement>(shadowRoot)) {
> if (slotNameFromAttributeValue(slotElement.attributeWithoutSynchronization(nameAttr)) == slotName)
>@@ -94,7 +94,7 @@ inline bool SlotAssignment::hasAssignedNodes(ShadowRoot& shadowRoot, Slot& slot)
> return !slot.assignedNodes.isEmpty();
> }
> 
>-void SlotAssignment::renameSlotElement(HTMLSlotElement& slotElement, const AtomicString& oldName, const AtomicString& newName, ShadowRoot& shadowRoot)
>+void SlotAssignment::renameSlotElement(HTMLSlotElement& slotElement, const AtomString& oldName, const AtomString& newName, ShadowRoot& shadowRoot)
> {
> ASSERT(m_slotElementsForConsistencyCheck.contains(&slotElement));
> 
>@@ -104,7 +104,7 @@ void SlotAssignment::renameSlotElement(HTMLSlotElement& slotElement, const Atomi
> addSlotElementByName(newName, slotElement, shadowRoot);
> }
> 
>-void SlotAssignment::addSlotElementByName(const AtomicString& name, HTMLSlotElement& slotElement, ShadowRoot& shadowRoot)
>+void SlotAssignment::addSlotElementByName(const AtomString& name, HTMLSlotElement& slotElement, ShadowRoot& shadowRoot)
> {
> #ifndef NDEBUG
> ASSERT(!m_slotElementsForConsistencyCheck.contains(&slotElement));
>@@ -143,7 +143,7 @@ void SlotAssignment::addSlotElementByName(const AtomicString& name, HTMLSlotElem
> resolveSlotsAfterSlotMutation(shadowRoot, SlotMutationType::Insertion);
> }
> 
>-void SlotAssignment::removeSlotElementByName(const AtomicString& name, HTMLSlotElement& slotElement, ContainerNode* oldParentOfRemovedTreeForRemoval, ShadowRoot& shadowRoot)
>+void SlotAssignment::removeSlotElementByName(const AtomString& name, HTMLSlotElement& slotElement, ContainerNode* oldParentOfRemovedTreeForRemoval, ShadowRoot& shadowRoot)
> {
> #ifndef NDEBUG
> ASSERT(m_slotElementsForConsistencyCheck.contains(&slotElement));
>@@ -289,7 +289,7 @@ void SlotAssignment::willRemoveAllChildren(ShadowRoot& shadowRoot)
> resolveAllSlotElements(shadowRoot);
> }
> 
>-void SlotAssignment::didChangeSlot(const AtomicString& slotAttrValue, ShadowRoot& shadowRoot)
>+void SlotAssignment::didChangeSlot(const AtomString& slotAttrValue, ShadowRoot& shadowRoot)
> {
> auto& slotName = slotNameFromAttributeValue(slotAttrValue);
> auto* slot = m_slots.get(slotName);
>@@ -317,7 +317,7 @@ void SlotAssignment::hostChildElementDidChange(const Element& childElement, Shad
> const Vector<Node*>* SlotAssignment::assignedNodesForSlot(const HTMLSlotElement& slotElement, ShadowRoot& shadowRoot)
> {
> ASSERT(slotElement.containingShadowRoot() == &shadowRoot);
>- const AtomicString& slotName = slotNameFromAttributeValue(slotElement.attributeWithoutSynchronization(nameAttr));
>+ const AtomString& slotName = slotNameFromAttributeValue(slotElement.attributeWithoutSynchronization(nameAttr));
> auto* slot = m_slots.get(slotName);
> RELEASE_ASSERT(slot);
> 
>@@ -334,7 +334,7 @@ const Vector<Node*>* SlotAssignment::assignedNodesForSlot(const HTMLSlotElement&
> return &slot->assignedNodes;
> }
> 
>-const AtomicString& SlotAssignment::slotNameForHostChild(const Node& child) const
>+const AtomString& SlotAssignment::slotNameForHostChild(const Node& child) const
> {
> return slotNameFromSlotAttribute(child);
> }
>@@ -399,7 +399,7 @@ void SlotAssignment::assignSlots(ShadowRoot& shadowRoot)
> entry.value->assignedNodes.shrinkToFit();
> }
> 
>-void SlotAssignment::assignToSlot(Node& child, const AtomicString& slotName)
>+void SlotAssignment::assignToSlot(Node& child, const AtomString& slotName)
> {
> ASSERT(!slotName.isNull());
> if (slotName == defaultSlotName()) {
>diff --git a/Source/WebCore/dom/SlotAssignment.h b/Source/WebCore/dom/SlotAssignment.h
>index 463673ca5907d9627cf79a62591aa873df3dc6ea..f2464a609ee40c95a4d881ebd8e1a8b62e76a2d8 100644
>--- a/Source/WebCore/dom/SlotAssignment.h
>+++ b/Source/WebCore/dom/SlotAssignment.h
>@@ -31,8 +31,8 @@
> #include <wtf/HashSet.h>
> #include <wtf/Vector.h>
> #include <wtf/WeakPtr.h>
>-#include <wtf/text/AtomicString.h>
>-#include <wtf/text/AtomicStringHash.h>
>+#include <wtf/text/AtomString.h>
>+#include <wtf/text/AtomStringHash.h>
> 
> namespace WebCore {
> 
>@@ -46,19 +46,19 @@ public:
> SlotAssignment();
> virtual ~SlotAssignment();
> 
>- static const AtomicString& defaultSlotName() { return emptyAtom(); }
>+ static const AtomString& defaultSlotName() { return emptyAtom(); }
> 
> HTMLSlotElement* findAssignedSlot(const Node&, ShadowRoot&);
> 
>- void renameSlotElement(HTMLSlotElement&, const AtomicString& oldName, const AtomicString& newName, ShadowRoot&);
>- void addSlotElementByName(const AtomicString&, HTMLSlotElement&, ShadowRoot&);
>- void removeSlotElementByName(const AtomicString&, HTMLSlotElement&, ContainerNode* oldParentOfRemovedTreeForRemoval, ShadowRoot&);
>+ void renameSlotElement(HTMLSlotElement&, const AtomString& oldName, const AtomString& newName, ShadowRoot&);
>+ void addSlotElementByName(const AtomString&, HTMLSlotElement&, ShadowRoot&);
>+ void removeSlotElementByName(const AtomString&, HTMLSlotElement&, ContainerNode* oldParentOfRemovedTreeForRemoval, ShadowRoot&);
> void slotFallbackDidChange(HTMLSlotElement&, ShadowRoot&);
> void resolveSlotsBeforeNodeInsertionOrRemoval(ShadowRoot&);
> void willRemoveAllChildren(ShadowRoot&);
> 
>- void didChangeSlot(const AtomicString&, ShadowRoot&);
>- void enqueueSlotChangeEvent(const AtomicString&, ShadowRoot&);
>+ void didChangeSlot(const AtomString&, ShadowRoot&);
>+ void enqueueSlotChangeEvent(const AtomString&, ShadowRoot&);
> 
> const Vector<Node*>* assignedNodesForSlot(const HTMLSlotElement&, ShadowRoot&);
> 
>@@ -85,15 +85,15 @@ private:
> enum class SlotMutationType { Insertion, Removal };
> void resolveSlotsAfterSlotMutation(ShadowRoot&, SlotMutationType, ContainerNode* oldParentOfRemovedTree = nullptr);
> 
>- virtual const AtomicString& slotNameForHostChild(const Node&) const;
>+ virtual const AtomString& slotNameForHostChild(const Node&) const;
> 
> HTMLSlotElement* findFirstSlotElement(Slot&, ShadowRoot&);
> void resolveAllSlotElements(ShadowRoot&);
> 
> void assignSlots(ShadowRoot&);
>- void assignToSlot(Node& child, const AtomicString& slotName);
>+ void assignToSlot(Node& child, const AtomString& slotName);
> 
>- HashMap<AtomicString, std::unique_ptr<Slot>> m_slots;
>+ HashMap<AtomString, std::unique_ptr<Slot>> m_slots;
> 
> #ifndef NDEBUG
> HashSet<HTMLSlotElement*> m_slotElementsForConsistencyCheck;
>@@ -136,7 +136,7 @@ inline void ShadowRoot::hostChildElementDidChange(const Element& childElement)
> m_slotAssignment->hostChildElementDidChange(childElement, *this);
> }
> 
>-inline void ShadowRoot::hostChildElementDidChangeSlotAttribute(Element& element, const AtomicString& oldValue, const AtomicString& newValue)
>+inline void ShadowRoot::hostChildElementDidChangeSlotAttribute(Element& element, const AtomString& oldValue, const AtomString& newValue)
> {
> if (!m_slotAssignment)
> return;
>diff --git a/Source/WebCore/dom/SpaceSplitString.cpp b/Source/WebCore/dom/SpaceSplitString.cpp
>index 10c69abe62a5e25885c33986daa9cfc9a470acea..18e385e2a299d0dc39a3040d190b7ca30b08ee31 100644
>--- a/Source/WebCore/dom/SpaceSplitString.cpp
>+++ b/Source/WebCore/dom/SpaceSplitString.cpp
>@@ -24,7 +24,7 @@
> #include "HTMLParserIdioms.h"
> #include <wtf/HashMap.h>
> #include <wtf/NeverDestroyed.h>
>-#include <wtf/text/AtomicStringHash.h>
>+#include <wtf/text/AtomStringHash.h>
> 
> namespace WebCore {
> 
>@@ -76,7 +76,7 @@ bool SpaceSplitStringData::containsAll(SpaceSplitStringData& other)
> return true;
> }
> 
>-struct SpaceSplitStringTableKeyTraits : public HashTraits<AtomicString>
>+struct SpaceSplitStringTableKeyTraits : public HashTraits<AtomString>
> {
> // The number 200 for typicalNumberOfSpaceSplitString was based on the typical number of unique class names
> // on typical websites on August 2013.
>@@ -84,7 +84,7 @@ struct SpaceSplitStringTableKeyTraits : public HashTraits<AtomicString>
> static const int minimumTableSize = WTF::HashTableCapacityForSize<typicalNumberOfSpaceSplitString>::value;
> };
> 
>-typedef HashMap<AtomicString, SpaceSplitStringData*, AtomicStringHash, SpaceSplitStringTableKeyTraits> SpaceSplitStringTable;
>+typedef HashMap<AtomString, SpaceSplitStringData*, AtomStringHash, SpaceSplitStringTableKeyTraits> SpaceSplitStringTable;
> 
> static SpaceSplitStringTable& spaceSplitStringTable()
> {
>@@ -92,7 +92,7 @@ static SpaceSplitStringTable& spaceSplitStringTable()
> return table;
> }
> 
>-void SpaceSplitString::set(const AtomicString& inputString, bool shouldFoldCase)
>+void SpaceSplitString::set(const AtomString& inputString, bool shouldFoldCase)
> {
> if (inputString.isNull()) {
> clear();
>@@ -155,35 +155,35 @@ private:
> unsigned m_tokenCount;
> };
> 
>-class TokenAtomicStringInitializer {
>- WTF_MAKE_NONCOPYABLE(TokenAtomicStringInitializer);
>+class TokenAtomStringInitializer {
>+ WTF_MAKE_NONCOPYABLE(TokenAtomStringInitializer);
> public:
>- TokenAtomicStringInitializer(AtomicString* memory) : m_memoryBucket(memory) { }
>+ TokenAtomStringInitializer(AtomString* memory) : m_memoryBucket(memory) { }
> 
> template<typename CharacterType> bool processToken(const CharacterType* characters, unsigned length)
> {
>- new (NotNull, m_memoryBucket) AtomicString(characters, length);
>+ new (NotNull, m_memoryBucket) AtomString(characters, length);
> ++m_memoryBucket;
> return true;
> }
> 
>- const AtomicString* nextMemoryBucket() const { return m_memoryBucket; }
>+ const AtomString* nextMemoryBucket() const { return m_memoryBucket; }
> 
> private:
>- AtomicString* m_memoryBucket;
>+ AtomString* m_memoryBucket;
> };
> 
>-inline Ref<SpaceSplitStringData> SpaceSplitStringData::create(const AtomicString& keyString, unsigned tokenCount)
>+inline Ref<SpaceSplitStringData> SpaceSplitStringData::create(const AtomString& keyString, unsigned tokenCount)
> {
> ASSERT(tokenCount);
> 
>- RELEASE_ASSERT(tokenCount < (std::numeric_limits<unsigned>::max() - sizeof(SpaceSplitStringData)) / sizeof(AtomicString));
>- unsigned sizeToAllocate = sizeof(SpaceSplitStringData) + tokenCount * sizeof(AtomicString);
>+ RELEASE_ASSERT(tokenCount < (std::numeric_limits<unsigned>::max() - sizeof(SpaceSplitStringData)) / sizeof(AtomString));
>+ unsigned sizeToAllocate = sizeof(SpaceSplitStringData) + tokenCount * sizeof(AtomString);
> SpaceSplitStringData* spaceSplitStringData = static_cast<SpaceSplitStringData*>(fastMalloc(sizeToAllocate));
> 
> new (NotNull, spaceSplitStringData) SpaceSplitStringData(keyString, tokenCount);
>- AtomicString* tokenArrayStart = spaceSplitStringData->tokenArrayStart();
>- TokenAtomicStringInitializer tokenInitializer(tokenArrayStart);
>+ AtomString* tokenArrayStart = spaceSplitStringData->tokenArrayStart();
>+ TokenAtomStringInitializer tokenInitializer(tokenArrayStart);
> tokenizeSpaceSplitString(tokenInitializer, keyString);
> ASSERT(static_cast<unsigned>(tokenInitializer.nextMemoryBucket() - tokenArrayStart) == tokenCount);
> ASSERT(reinterpret_cast<const char*>(tokenInitializer.nextMemoryBucket()) == reinterpret_cast<const char*>(spaceSplitStringData) + sizeToAllocate);
>@@ -191,7 +191,7 @@ inline Ref<SpaceSplitStringData> SpaceSplitStringData::create(const AtomicString
> return adoptRef(*spaceSplitStringData);
> }
> 
>-RefPtr<SpaceSplitStringData> SpaceSplitStringData::create(const AtomicString& keyString)
>+RefPtr<SpaceSplitStringData> SpaceSplitStringData::create(const AtomString& keyString)
> {
> ASSERT(isMainThread());
> ASSERT(!keyString.isNull());
>@@ -223,9 +223,9 @@ void SpaceSplitStringData::destroy(SpaceSplitStringData* spaceSplitString)
> 
> unsigned i = 0;
> unsigned size = spaceSplitString->size();
>- const AtomicString* data = spaceSplitString->tokenArrayStart();
>+ const AtomString* data = spaceSplitString->tokenArrayStart();
> do {
>- data[i].~AtomicString();
>+ data[i].~AtomString();
> ++i;
> } while (i < size);
> 
>diff --git a/Source/WebCore/dom/SpaceSplitString.h b/Source/WebCore/dom/SpaceSplitString.h
>index 057fbfc47e8ebaae0c3a80fd2026fd7b312b0590..6a18564b49e7eda69b5a586477de42698d4b81ea 100644
>--- a/Source/WebCore/dom/SpaceSplitString.h
>+++ b/Source/WebCore/dom/SpaceSplitString.h
>@@ -21,7 +21,7 @@
> #pragma once
> 
> #include <wtf/MainThread.h>
>-#include <wtf/text/AtomicString.h>
>+#include <wtf/text/AtomString.h>
> 
> namespace WebCore {
> 
>@@ -29,11 +29,11 @@ class SpaceSplitStringData {
> WTF_MAKE_NONCOPYABLE(SpaceSplitStringData);
> WTF_MAKE_FAST_ALLOCATED;
> public:
>- static RefPtr<SpaceSplitStringData> create(const AtomicString&);
>+ static RefPtr<SpaceSplitStringData> create(const AtomString&);
> 
>- bool contains(const AtomicString& string)
>+ bool contains(const AtomString& string)
> {
>- const AtomicString* data = tokenArrayStart();
>+ const AtomString* data = tokenArrayStart();
> unsigned i = 0;
> do {
> if (data[i] == string)
>@@ -48,7 +48,7 @@ public:
> unsigned size() const { return m_size; }
> static ptrdiff_t sizeMemoryOffset() { return OBJECT_OFFSETOF(SpaceSplitStringData, m_size); }
> 
>- const AtomicString& operator[](unsigned i)
>+ const AtomString& operator[](unsigned i)
> {
> RELEASE_ASSERT(i < m_size);
> return tokenArrayStart()[i];
>@@ -76,8 +76,8 @@ public:
> static ptrdiff_t tokensMemoryOffset() { return sizeof(SpaceSplitStringData); }
> 
> private:
>- static Ref<SpaceSplitStringData> create(const AtomicString&, unsigned tokenCount);
>- SpaceSplitStringData(const AtomicString& string, unsigned size)
>+ static Ref<SpaceSplitStringData> create(const AtomString&, unsigned tokenCount);
>+ SpaceSplitStringData(const AtomString& string, unsigned size)
> : m_keyString(string)
> , m_refCount(1)
> , m_size(size)
>@@ -89,9 +89,9 @@ private:
> ~SpaceSplitStringData() = default;
> static void destroy(SpaceSplitStringData*);
> 
>- AtomicString* tokenArrayStart() { return reinterpret_cast<AtomicString*>(this + 1); }
>+ AtomString* tokenArrayStart() { return reinterpret_cast<AtomString*>(this + 1); }
> 
>- AtomicString m_keyString;
>+ AtomString m_keyString;
> unsigned m_refCount;
> unsigned m_size;
> };
>@@ -99,19 +99,19 @@ private:
> class SpaceSplitString {
> public:
> SpaceSplitString() = default;
>- SpaceSplitString(const AtomicString& string, bool shouldFoldCase) { set(string, shouldFoldCase); }
>+ SpaceSplitString(const AtomString& string, bool shouldFoldCase) { set(string, shouldFoldCase); }
> 
> bool operator!=(const SpaceSplitString& other) const { return m_data != other.m_data; }
> 
>- void set(const AtomicString&, bool shouldFoldCase);
>+ void set(const AtomString&, bool shouldFoldCase);
> void clear() { m_data = nullptr; }
> 
>- bool contains(const AtomicString& string) const { return m_data && m_data->contains(string); }
>+ bool contains(const AtomString& string) const { return m_data && m_data->contains(string); }
> bool containsAll(const SpaceSplitString& names) const { return !names.m_data || (m_data && m_data->containsAll(*names.m_data)); }
> 
> unsigned size() const { return m_data ? m_data->size() : 0; }
> bool isEmpty() const { return !m_data; }
>- const AtomicString& operator[](unsigned i) const
>+ const AtomString& operator[](unsigned i) const
> {
> ASSERT_WITH_SECURITY_IMPLICATION(m_data);
> return (*m_data)[i];
>diff --git a/Source/WebCore/dom/StyledElement.cpp b/Source/WebCore/dom/StyledElement.cpp
>index 80c81f85ae46c698ddb94a1c7df46b388386d48b..3ab2feda3783aa9a0d24c07c851a619ab46a9794 100644
>--- a/Source/WebCore/dom/StyledElement.cpp
>+++ b/Source/WebCore/dom/StyledElement.cpp
>@@ -140,7 +140,7 @@ MutableStyleProperties& StyledElement::ensureMutableInlineStyle()
> return downcast<MutableStyleProperties>(*inlineStyle);
> }
> 
>-void StyledElement::attributeChanged(const QualifiedName& name, const AtomicString& oldValue, const AtomicString& newValue, AttributeModificationReason reason)
>+void StyledElement::attributeChanged(const QualifiedName& name, const AtomString& oldValue, const AtomString& newValue, AttributeModificationReason reason)
> {
> if (oldValue != newValue) {
> if (name == styleAttr)
>@@ -168,7 +168,7 @@ static bool usesStyleBasedEditability(const StyleProperties& properties)
> return properties.getPropertyCSSValue(CSSPropertyWebkitUserModify);
> }
> 
>-void StyledElement::setInlineStyleFromString(const AtomicString& newStyleString)
>+void StyledElement::setInlineStyleFromString(const AtomString& newStyleString)
> {
> RefPtr<StyleProperties>& inlineStyle = elementData()->m_inlineStyle;
> 
>@@ -190,7 +190,7 @@ void StyledElement::setInlineStyleFromString(const AtomicString& newStyleString)
> document().setHasElementUsingStyleBasedEditability();
> }
> 
>-void StyledElement::styleAttributeChanged(const AtomicString& newStyleString, AttributeModificationReason reason)
>+void StyledElement::styleAttributeChanged(const AtomString& newStyleString, AttributeModificationReason reason)
> {
> WTF::OrdinalNumber startLineNumber = WTF::OrdinalNumber::beforeFirst();
> if (document().scriptableDocumentParser() && !document().isInDocumentWrite())
>diff --git a/Source/WebCore/dom/StyledElement.h b/Source/WebCore/dom/StyledElement.h
>index c53d8e6157aa9d2750b8f89d084561aab10a2738..56f6f4412731a5cf554f965c7138a7536c3997a1 100644
>--- a/Source/WebCore/dom/StyledElement.h
>+++ b/Source/WebCore/dom/StyledElement.h
>@@ -63,7 +63,7 @@ public:
> #endif
> 
> const StyleProperties* presentationAttributeStyle() const;
>- virtual void collectStyleForPresentationAttribute(const QualifiedName&, const AtomicString&, MutableStyleProperties&) { }
>+ virtual void collectStyleForPresentationAttribute(const QualifiedName&, const AtomString&, MutableStyleProperties&) { }
> 
> protected:
> StyledElement(const QualifiedName& name, Document& document, ConstructionType type)
>@@ -71,7 +71,7 @@ protected:
> {
> }
> 
>- void attributeChanged(const QualifiedName&, const AtomicString& oldValue, const AtomicString& newValue, AttributeModificationReason = ModifiedDirectly) override;
>+ void attributeChanged(const QualifiedName&, const AtomString& oldValue, const AtomString& newValue, AttributeModificationReason = ModifiedDirectly) override;
> 
> virtual bool isPresentationAttribute(const QualifiedName&) const { return false; }
> 
>@@ -82,11 +82,11 @@ protected:
> void addSubresourceAttributeURLs(ListHashSet<URL>&) const override;
> 
> private:
>- void styleAttributeChanged(const AtomicString& newStyleString, AttributeModificationReason);
>+ void styleAttributeChanged(const AtomString& newStyleString, AttributeModificationReason);
> 
> void inlineStyleChanged();
> PropertySetCSSStyleDeclaration* inlineStyleCSSOMWrapper();
>- void setInlineStyleFromString(const AtomicString&);
>+ void setInlineStyleFromString(const AtomString&);
> MutableStyleProperties& ensureMutableInlineStyle();
> 
> void rebuildPresentationAttributeStyle();
>diff --git a/Source/WebCore/dom/TagCollection.cpp b/Source/WebCore/dom/TagCollection.cpp
>index 4291fcdab4945ae8e69a9f781d3396665b4c1813..e067f2f1d2984cb787fee9a304912155dc9c3744 100644
>--- a/Source/WebCore/dom/TagCollection.cpp
>+++ b/Source/WebCore/dom/TagCollection.cpp
>@@ -33,7 +33,7 @@ WTF_MAKE_ISO_ALLOCATED_IMPL(TagCollection);
> WTF_MAKE_ISO_ALLOCATED_IMPL(TagCollectionNS);
> WTF_MAKE_ISO_ALLOCATED_IMPL(HTMLTagCollection);
> 
>-TagCollectionNS::TagCollectionNS(ContainerNode& rootNode, const AtomicString& namespaceURI, const AtomicString& localName)
>+TagCollectionNS::TagCollectionNS(ContainerNode& rootNode, const AtomString& namespaceURI, const AtomString& localName)
> : CachedHTMLCollection<TagCollectionNS, CollectionTypeTraits<ByTag>::traversalType>(rootNode, ByTag)
> , m_namespaceURI(namespaceURI)
> , m_localName(localName)
>@@ -46,7 +46,7 @@ TagCollectionNS::~TagCollectionNS()
> ownerNode().nodeLists()->removeCachedTagCollectionNS(*this, m_namespaceURI, m_localName);
> }
> 
>-TagCollection::TagCollection(ContainerNode& rootNode, const AtomicString& qualifiedName)
>+TagCollection::TagCollection(ContainerNode& rootNode, const AtomString& qualifiedName)
> : CachedHTMLCollection<TagCollection, CollectionTypeTraits<ByTag>::traversalType>(rootNode, ByTag)
> , m_qualifiedName(qualifiedName)
> {
>@@ -58,7 +58,7 @@ TagCollection::~TagCollection()
> ownerNode().nodeLists()->removeCachedCollection(this, m_qualifiedName);
> }
> 
>-HTMLTagCollection::HTMLTagCollection(ContainerNode& rootNode, const AtomicString& qualifiedName)
>+HTMLTagCollection::HTMLTagCollection(ContainerNode& rootNode, const AtomString& qualifiedName)
> : CachedHTMLCollection<HTMLTagCollection, CollectionTypeTraits<ByHTMLTag>::traversalType>(rootNode, ByHTMLTag)
> , m_qualifiedName(qualifiedName)
> , m_loweredQualifiedName(qualifiedName.convertToASCIILowercase())
>diff --git a/Source/WebCore/dom/TagCollection.h b/Source/WebCore/dom/TagCollection.h
>index 482e0db4f86820a4f48d14e7e17b6d06381cc43d..81dd3a59228640b4ba959669bfad3f20e6591419 100644
>--- a/Source/WebCore/dom/TagCollection.h
>+++ b/Source/WebCore/dom/TagCollection.h
>@@ -24,7 +24,7 @@
> #pragma once
> 
> #include "CachedHTMLCollection.h"
>-#include <wtf/text/AtomicString.h>
>+#include <wtf/text/AtomString.h>
> 
> namespace WebCore {
> 
>@@ -32,7 +32,7 @@ namespace WebCore {
> class TagCollection final : public CachedHTMLCollection<TagCollection, CollectionTypeTraits<ByTag>::traversalType> {
> WTF_MAKE_ISO_ALLOCATED(TagCollection);
> public:
>- static Ref<TagCollection> create(ContainerNode& rootNode, CollectionType type, const AtomicString& qualifiedName)
>+ static Ref<TagCollection> create(ContainerNode& rootNode, CollectionType type, const AtomString& qualifiedName)
> {
> ASSERT_UNUSED(type, type == ByTag);
> return adoptRef(*new TagCollection(rootNode, qualifiedName));
>@@ -42,15 +42,15 @@ public:
> bool elementMatches(Element&) const;
> 
> private:
>- TagCollection(ContainerNode& rootNode, const AtomicString& qualifiedName);
>+ TagCollection(ContainerNode& rootNode, const AtomString& qualifiedName);
> 
>- AtomicString m_qualifiedName;
>+ AtomString m_qualifiedName;
> };
> 
> class TagCollectionNS final : public CachedHTMLCollection<TagCollectionNS, CollectionTypeTraits<ByTag>::traversalType> {
> WTF_MAKE_ISO_ALLOCATED(TagCollectionNS);
> public:
>- static Ref<TagCollectionNS> create(ContainerNode& rootNode, const AtomicString& namespaceURI, const AtomicString& localName)
>+ static Ref<TagCollectionNS> create(ContainerNode& rootNode, const AtomString& namespaceURI, const AtomString& localName)
> {
> return adoptRef(*new TagCollectionNS(rootNode, namespaceURI, localName));
> }
>@@ -59,16 +59,16 @@ public:
> bool elementMatches(Element&) const;
> 
> private:
>- TagCollectionNS(ContainerNode& rootNode, const AtomicString& namespaceURI, const AtomicString& localName);
>+ TagCollectionNS(ContainerNode& rootNode, const AtomString& namespaceURI, const AtomString& localName);
> 
>- AtomicString m_namespaceURI;
>- AtomicString m_localName;
>+ AtomString m_namespaceURI;
>+ AtomString m_localName;
> };
> 
> class HTMLTagCollection final : public CachedHTMLCollection<HTMLTagCollection, CollectionTypeTraits<ByHTMLTag>::traversalType> {
> WTF_MAKE_ISO_ALLOCATED(HTMLTagCollection);
> public:
>- static Ref<HTMLTagCollection> create(ContainerNode& rootNode, CollectionType type, const AtomicString& qualifiedName)
>+ static Ref<HTMLTagCollection> create(ContainerNode& rootNode, CollectionType type, const AtomString& qualifiedName)
> {
> ASSERT_UNUSED(type, type == ByHTMLTag);
> return adoptRef(*new HTMLTagCollection(rootNode, qualifiedName));
>@@ -78,10 +78,10 @@ public:
> bool elementMatches(Element&) const;
> 
> private:
>- HTMLTagCollection(ContainerNode& rootNode, const AtomicString& qualifiedName);
>+ HTMLTagCollection(ContainerNode& rootNode, const AtomString& qualifiedName);
> 
>- AtomicString m_qualifiedName;
>- AtomicString m_loweredQualifiedName;
>+ AtomString m_qualifiedName;
>+ AtomString m_loweredQualifiedName;
> };
> 
> inline bool TagCollection::elementMatches(Element& element) const
>diff --git a/Source/WebCore/dom/TextEvent.cpp b/Source/WebCore/dom/TextEvent.cpp
>index 6a041e8244bfafaead8ad15e24d41d99c29f63e6..eb46b7df65c8291bc060a070ee68329a617cbd0a 100644
>--- a/Source/WebCore/dom/TextEvent.cpp
>+++ b/Source/WebCore/dom/TextEvent.cpp
>@@ -105,7 +105,7 @@ TextEvent::TextEvent(RefPtr<WindowProxy>&& view, const String& data, const Vecto
> 
> TextEvent::~TextEvent() = default;
> 
>-void TextEvent::initTextEvent(const AtomicString& type, bool canBubble, bool cancelable, RefPtr<WindowProxy>&& view, const String& data)
>+void TextEvent::initTextEvent(const AtomString& type, bool canBubble, bool cancelable, RefPtr<WindowProxy>&& view, const String& data)
> {
> if (isBeingDispatched())
> return;
>diff --git a/Source/WebCore/dom/TextEvent.h b/Source/WebCore/dom/TextEvent.h
>index 0ae2ac863fb81bbb286385165b6b1251d2dfb1b8..916deb502b5a004431d8291263b7a420201ec198 100644
>--- a/Source/WebCore/dom/TextEvent.h
>+++ b/Source/WebCore/dom/TextEvent.h
>@@ -47,7 +47,7 @@ namespace WebCore {
> 
> virtual ~TextEvent();
> 
>- WEBCORE_EXPORT void initTextEvent(const AtomicString& type, bool canBubble, bool cancelable, RefPtr<WindowProxy>&&, const String& data);
>+ WEBCORE_EXPORT void initTextEvent(const AtomString& type, bool canBubble, bool cancelable, RefPtr<WindowProxy>&&, const String& data);
> 
> String data() const { return m_data; }
> 
>diff --git a/Source/WebCore/dom/TouchEvent.cpp b/Source/WebCore/dom/TouchEvent.cpp
>index 53267e4421aa316f27c2e31a55b4e3920c8eff88..eb0e84913d5cf8e76da677c9c5a31500f173a0a1 100644
>--- a/Source/WebCore/dom/TouchEvent.cpp
>+++ b/Source/WebCore/dom/TouchEvent.cpp
>@@ -36,7 +36,7 @@ namespace WebCore {
> 
> TouchEvent::TouchEvent() = default;
> 
>-TouchEvent::TouchEvent(TouchList* touches, TouchList* targetTouches, TouchList* changedTouches, const AtomicString& type,
>+TouchEvent::TouchEvent(TouchList* touches, TouchList* targetTouches, TouchList* changedTouches, const AtomString& type,
> RefPtr<WindowProxy>&& view, const IntPoint& globalLocation, OptionSet<Modifier> modifiers)
> : MouseRelatedEvent(type, IsCancelable::Yes, MonotonicTime::now(), WTFMove(view), globalLocation, modifiers)
> , m_touches(touches)
>@@ -45,7 +45,7 @@ TouchEvent::TouchEvent(TouchList* touches, TouchList* targetTouches, TouchList*
> {
> }
> 
>-TouchEvent::TouchEvent(const AtomicString& type, const Init& initializer, IsTrusted isTrusted)
>+TouchEvent::TouchEvent(const AtomString& type, const Init& initializer, IsTrusted isTrusted)
> : MouseRelatedEvent(type, initializer, isTrusted)
> , m_touches(initializer.touches ? initializer.touches : TouchList::create())
> , m_targetTouches(initializer.targetTouches ? initializer.targetTouches : TouchList::create())
>@@ -56,7 +56,7 @@ TouchEvent::TouchEvent(const AtomicString& type, const Init& initializer, IsTrus
> TouchEvent::~TouchEvent() = default;
> 
> void TouchEvent::initTouchEvent(TouchList* touches, TouchList* targetTouches,
>- TouchList* changedTouches, const AtomicString& type, 
>+ TouchList* changedTouches, const AtomString& type, 
> RefPtr<WindowProxy>&& view, int screenX, int screenY, int clientX, int clientY,
> bool ctrlKey, bool altKey, bool shiftKey, bool metaKey)
> {
>diff --git a/Source/WebCore/dom/TouchEvent.h b/Source/WebCore/dom/TouchEvent.h
>index 13de0c298651ce4110e46a775cd31cac33b84eb5..833fe2a508fe1ba92bb58894823bc1ef65f77b36 100644
>--- a/Source/WebCore/dom/TouchEvent.h
>+++ b/Source/WebCore/dom/TouchEvent.h
>@@ -40,7 +40,7 @@ public:
> virtual ~TouchEvent();
> 
> static Ref<TouchEvent> create(TouchList* touches, TouchList* targetTouches, TouchList* changedTouches,
>- const AtomicString& type, RefPtr<WindowProxy>&& view, const IntPoint& globalLocation, OptionSet<Modifier> modifiers)
>+ const AtomString& type, RefPtr<WindowProxy>&& view, const IntPoint& globalLocation, OptionSet<Modifier> modifiers)
> {
> return adoptRef(*new TouchEvent(touches, targetTouches, changedTouches, type, WTFMove(view), globalLocation, modifiers));
> }
>@@ -55,12 +55,12 @@ public:
> RefPtr<TouchList> changedTouches;
> };
> 
>- static Ref<TouchEvent> create(const AtomicString& type, const Init& initializer, IsTrusted isTrusted = IsTrusted::No)
>+ static Ref<TouchEvent> create(const AtomString& type, const Init& initializer, IsTrusted isTrusted = IsTrusted::No)
> {
> return adoptRef(*new TouchEvent(type, initializer, isTrusted));
> }
> 
>- void initTouchEvent(TouchList* touches, TouchList* targetTouches, TouchList* changedTouches, const AtomicString& type,
>+ void initTouchEvent(TouchList* touches, TouchList* targetTouches, TouchList* changedTouches, const AtomString& type,
> RefPtr<WindowProxy>&&, int screenX, int screenY, int clientX, int clientY, bool ctrlKey, bool altKey, bool shiftKey, bool metaKey);
> 
> TouchList* touches() const { return m_touches.get(); }
>@@ -77,9 +77,9 @@ public:
> 
> private:
> TouchEvent();
>- TouchEvent(TouchList* touches, TouchList* targetTouches, TouchList* changedTouches, const AtomicString& type,
>+ TouchEvent(TouchList* touches, TouchList* targetTouches, TouchList* changedTouches, const AtomString& type,
> RefPtr<WindowProxy>&&, const IntPoint& globalLocation, OptionSet<Modifier>);
>- TouchEvent(const AtomicString&, const Init&, IsTrusted);
>+ TouchEvent(const AtomString&, const Init&, IsTrusted);
> 
> RefPtr<TouchList> m_touches;
> RefPtr<TouchList> m_targetTouches;
>diff --git a/Source/WebCore/dom/TransitionEvent.cpp b/Source/WebCore/dom/TransitionEvent.cpp
>index 5db09b9939c04c3bfe10fa0631e7c17001334643..11cb174157ce783902bc7090fbeb583fa9265945 100644
>--- a/Source/WebCore/dom/TransitionEvent.cpp
>+++ b/Source/WebCore/dom/TransitionEvent.cpp
>@@ -29,7 +29,7 @@
> 
> namespace WebCore {
> 
>-TransitionEvent::TransitionEvent(const AtomicString& type, const String& propertyName, double elapsedTime, const String& pseudoElement)
>+TransitionEvent::TransitionEvent(const AtomString& type, const String& propertyName, double elapsedTime, const String& pseudoElement)
> : Event(type, CanBubble::Yes, IsCancelable::Yes)
> , m_propertyName(propertyName)
> , m_elapsedTime(elapsedTime)
>@@ -37,7 +37,7 @@ TransitionEvent::TransitionEvent(const AtomicString& type, const String& propert
> {
> }
> 
>-TransitionEvent::TransitionEvent(const AtomicString& type, const Init& initializer, IsTrusted isTrusted)
>+TransitionEvent::TransitionEvent(const AtomString& type, const Init& initializer, IsTrusted isTrusted)
> : Event(type, initializer, isTrusted)
> , m_propertyName(initializer.propertyName)
> , m_elapsedTime(initializer.elapsedTime)
>diff --git a/Source/WebCore/dom/TransitionEvent.h b/Source/WebCore/dom/TransitionEvent.h
>index 06d1d04f2880c8e3885915a84f501b289c60ea11..b50ee247e6bf4070e4fd1fd53b4d74ef6da1fb23 100644
>--- a/Source/WebCore/dom/TransitionEvent.h
>+++ b/Source/WebCore/dom/TransitionEvent.h
>@@ -32,7 +32,7 @@ namespace WebCore {
> 
> class TransitionEvent final : public Event {
> public:
>- static Ref<TransitionEvent> create(const AtomicString& type, const String& propertyName, double elapsedTime, const String& pseudoElement)
>+ static Ref<TransitionEvent> create(const AtomString& type, const String& propertyName, double elapsedTime, const String& pseudoElement)
> {
> return adoptRef(*new TransitionEvent(type, propertyName, elapsedTime, pseudoElement));
> }
>@@ -43,7 +43,7 @@ public:
> String pseudoElement;
> };
> 
>- static Ref<TransitionEvent> create(const AtomicString& type, const Init& initializer, IsTrusted isTrusted = IsTrusted::No)
>+ static Ref<TransitionEvent> create(const AtomString& type, const Init& initializer, IsTrusted isTrusted = IsTrusted::No)
> {
> return adoptRef(*new TransitionEvent(type, initializer, isTrusted));
> }
>@@ -57,8 +57,8 @@ public:
> EventInterface eventInterface() const override;
> 
> private:
>- TransitionEvent(const AtomicString& type, const String& propertyName, double elapsedTime, const String& pseudoElement);
>- TransitionEvent(const AtomicString& type, const Init& initializer, IsTrusted);
>+ TransitionEvent(const AtomString& type, const String& propertyName, double elapsedTime, const String& pseudoElement);
>+ TransitionEvent(const AtomString& type, const Init& initializer, IsTrusted);
> 
> String m_propertyName;
> double m_elapsedTime;
>diff --git a/Source/WebCore/dom/TreeScope.cpp b/Source/WebCore/dom/TreeScope.cpp
>index c4d5587d6bec70e843bd996a663949ddf75fa2df..2f2870d1669d44bc6184a72ec63eb323f527d39f 100644
>--- a/Source/WebCore/dom/TreeScope.cpp
>+++ b/Source/WebCore/dom/TreeScope.cpp
>@@ -98,7 +98,7 @@ void TreeScope::setParentTreeScope(TreeScope& newParentScope)
> setDocumentScope(newParentScope.documentScope());
> }
> 
>-Element* TreeScope::getElementById(const AtomicString& elementId) const
>+Element* TreeScope::getElementById(const AtomString& elementId) const
> {
> if (elementId.isNull())
> return nullptr;
>@@ -112,7 +112,7 @@ Element* TreeScope::getElementById(const String& elementId) const
> if (!m_elementsById)
> return nullptr;
> 
>- if (RefPtr<AtomicStringImpl> atomicElementId = AtomicStringImpl::lookUp(elementId.impl()))
>+ if (RefPtr<AtomStringImpl> atomicElementId = AtomStringImpl::lookUp(elementId.impl()))
> return m_elementsById->getElementById(*atomicElementId, *this);
> 
> return nullptr;
>@@ -123,13 +123,13 @@ Element* TreeScope::getElementById(StringView elementId) const
> if (!m_elementsById)
> return nullptr;
> 
>- if (auto atomicElementId = elementId.toExistingAtomicString())
>+ if (auto atomicElementId = elementId.toExistingAtomString())
> return m_elementsById->getElementById(*atomicElementId, *this);
> 
> return nullptr;
> }
> 
>-const Vector<Element*>* TreeScope::getAllElementsById(const AtomicString& elementId) const
>+const Vector<Element*>* TreeScope::getAllElementsById(const AtomString& elementId) const
> {
> if (elementId.isEmpty())
> return nullptr;
>@@ -138,7 +138,7 @@ const Vector<Element*>* TreeScope::getAllElementsById(const AtomicString& elemen
> return m_elementsById->getAllElementsById(*elementId.impl(), *this);
> }
> 
>-void TreeScope::addElementById(const AtomicStringImpl& elementId, Element& element, bool notifyObservers)
>+void TreeScope::addElementById(const AtomStringImpl& elementId, Element& element, bool notifyObservers)
> {
> if (!m_elementsById)
> m_elementsById = std::make_unique<TreeScopeOrderedMap>();
>@@ -147,7 +147,7 @@ void TreeScope::addElementById(const AtomicStringImpl& elementId, Element& eleme
> m_idTargetObserverRegistry->notifyObservers(elementId);
> }
> 
>-void TreeScope::removeElementById(const AtomicStringImpl& elementId, Element& element, bool notifyObservers)
>+void TreeScope::removeElementById(const AtomStringImpl& elementId, Element& element, bool notifyObservers)
> {
> if (!m_elementsById)
> return;
>@@ -156,7 +156,7 @@ void TreeScope::removeElementById(const AtomicStringImpl& elementId, Element& el
> m_idTargetObserverRegistry->notifyObservers(elementId);
> }
> 
>-Element* TreeScope::getElementByName(const AtomicString& name) const
>+Element* TreeScope::getElementByName(const AtomString& name) const
> {
> if (name.isEmpty())
> return nullptr;
>@@ -165,14 +165,14 @@ Element* TreeScope::getElementByName(const AtomicString& name) const
> return m_elementsByName->getElementByName(*name.impl(), *this);
> }
> 
>-void TreeScope::addElementByName(const AtomicStringImpl& name, Element& element)
>+void TreeScope::addElementByName(const AtomStringImpl& name, Element& element)
> {
> if (!m_elementsByName)
> m_elementsByName = std::make_unique<TreeScopeOrderedMap>();
> m_elementsByName->add(name, element, *this);
> }
> 
>-void TreeScope::removeElementByName(const AtomicStringImpl& name, Element& element)
>+void TreeScope::removeElementByName(const AtomStringImpl& name, Element& element)
> {
> if (!m_elementsByName)
> return;
>@@ -235,7 +235,7 @@ Element* TreeScope::ancestorElementInThisScope(Element* element) const
> 
> void TreeScope::addImageMap(HTMLMapElement& imageMap)
> {
>- AtomicStringImpl* name = imageMap.getName().impl();
>+ AtomStringImpl* name = imageMap.getName().impl();
> if (!name)
> return;
> if (!m_imageMapsByName)
>@@ -247,53 +247,53 @@ void TreeScope::removeImageMap(HTMLMapElement& imageMap)
> {
> if (!m_imageMapsByName)
> return;
>- AtomicStringImpl* name = imageMap.getName().impl();
>+ AtomStringImpl* name = imageMap.getName().impl();
> if (!name)
> return;
> m_imageMapsByName->remove(*name, imageMap);
> }
> 
>-HTMLMapElement* TreeScope::getImageMap(const AtomicString& name) const
>+HTMLMapElement* TreeScope::getImageMap(const AtomString& name) const
> {
> if (!m_imageMapsByName || !name.impl())
> return nullptr;
> return m_imageMapsByName->getElementByMapName(*name.impl(), *this);
> }
> 
>-void TreeScope::addImageElementByUsemap(const AtomicStringImpl& name, HTMLImageElement& element)
>+void TreeScope::addImageElementByUsemap(const AtomStringImpl& name, HTMLImageElement& element)
> {
> if (!m_imagesByUsemap)
> m_imagesByUsemap = std::make_unique<TreeScopeOrderedMap>();
> return m_imagesByUsemap->add(name, element, *this);
> }
> 
>-void TreeScope::removeImageElementByUsemap(const AtomicStringImpl& name, HTMLImageElement& element)
>+void TreeScope::removeImageElementByUsemap(const AtomStringImpl& name, HTMLImageElement& element)
> {
> if (!m_imagesByUsemap)
> return;
> m_imagesByUsemap->remove(name, element);
> }
> 
>-HTMLImageElement* TreeScope::imageElementByUsemap(const AtomicStringImpl& name) const
>+HTMLImageElement* TreeScope::imageElementByUsemap(const AtomStringImpl& name) const
> {
> if (!m_imagesByUsemap)
> return nullptr;
> return m_imagesByUsemap->getElementByUsemap(name, *this);
> }
> 
>-void TreeScope::addLabel(const AtomicStringImpl& forAttributeValue, HTMLLabelElement& element)
>+void TreeScope::addLabel(const AtomStringImpl& forAttributeValue, HTMLLabelElement& element)
> {
> ASSERT(m_labelsByForAttribute);
> m_labelsByForAttribute->add(forAttributeValue, element, *this);
> }
> 
>-void TreeScope::removeLabel(const AtomicStringImpl& forAttributeValue, HTMLLabelElement& element)
>+void TreeScope::removeLabel(const AtomStringImpl& forAttributeValue, HTMLLabelElement& element)
> {
> ASSERT(m_labelsByForAttribute);
> m_labelsByForAttribute->remove(forAttributeValue, element);
> }
> 
>-HTMLLabelElement* TreeScope::labelElementForId(const AtomicString& forAttributeValue)
>+HTMLLabelElement* TreeScope::labelElementForId(const AtomString& forAttributeValue)
> {
> if (forAttributeValue.isEmpty())
> return nullptr;
>@@ -303,7 +303,7 @@ HTMLLabelElement* TreeScope::labelElementForId(const AtomicString& forAttributeV
> m_labelsByForAttribute = std::make_unique<TreeScopeOrderedMap>();
> 
> for (auto& label : descendantsOfType<HTMLLabelElement>(m_rootNode)) {
>- const AtomicString& forValue = label.attributeWithoutSynchronization(forAttr);
>+ const AtomString& forValue = label.attributeWithoutSynchronization(forAttr);
> if (!forValue.isEmpty())
> addLabel(*forValue.impl(), label);
> }
>diff --git a/Source/WebCore/dom/TreeScope.h b/Source/WebCore/dom/TreeScope.h
>index efb4425fbee3e997b4747fb2047c7493a16013db..2f257f0fe1c7f118c79a45f4d07c69493317edfc 100644
>--- a/Source/WebCore/dom/TreeScope.h
>+++ b/Source/WebCore/dom/TreeScope.h
>@@ -30,7 +30,7 @@
> #include <memory>
> #include <wtf/Forward.h>
> #include <wtf/Vector.h>
>-#include <wtf/text/AtomicString.h>
>+#include <wtf/text/AtomString.h>
> 
> namespace WebCore {
> 
>@@ -56,20 +56,20 @@ public:
> Element* focusedElementInScope();
> Element* pointerLockElement() const;
> 
>- WEBCORE_EXPORT Element* getElementById(const AtomicString&) const;
>+ WEBCORE_EXPORT Element* getElementById(const AtomString&) const;
> WEBCORE_EXPORT Element* getElementById(const String&) const;
> Element* getElementById(StringView) const;
>- const Vector<Element*>* getAllElementsById(const AtomicString&) const;
>- bool hasElementWithId(const AtomicStringImpl&) const;
>- bool containsMultipleElementsWithId(const AtomicString& id) const;
>- void addElementById(const AtomicStringImpl& elementId, Element&, bool notifyObservers = true);
>- void removeElementById(const AtomicStringImpl& elementId, Element&, bool notifyObservers = true);
>-
>- WEBCORE_EXPORT Element* getElementByName(const AtomicString&) const;
>- bool hasElementWithName(const AtomicStringImpl&) const;
>- bool containsMultipleElementsWithName(const AtomicString&) const;
>- void addElementByName(const AtomicStringImpl&, Element&);
>- void removeElementByName(const AtomicStringImpl&, Element&);
>+ const Vector<Element*>* getAllElementsById(const AtomString&) const;
>+ bool hasElementWithId(const AtomStringImpl&) const;
>+ bool containsMultipleElementsWithId(const AtomString& id) const;
>+ void addElementById(const AtomStringImpl& elementId, Element&, bool notifyObservers = true);
>+ void removeElementById(const AtomStringImpl& elementId, Element&, bool notifyObservers = true);
>+
>+ WEBCORE_EXPORT Element* getElementByName(const AtomString&) const;
>+ bool hasElementWithName(const AtomStringImpl&) const;
>+ bool containsMultipleElementsWithName(const AtomString&) const;
>+ void addElementByName(const AtomStringImpl&, Element&);
>+ void removeElementByName(const AtomStringImpl&, Element&);
> 
> Document& documentScope() const { return m_documentScope.get(); }
> static ptrdiff_t documentScopeMemoryOffset() { return OBJECT_OFFSETOF(TreeScope, m_documentScope); }
>@@ -82,17 +82,17 @@ public:
> 
> void addImageMap(HTMLMapElement&);
> void removeImageMap(HTMLMapElement&);
>- HTMLMapElement* getImageMap(const AtomicString&) const;
>+ HTMLMapElement* getImageMap(const AtomString&) const;
> 
>- void addImageElementByUsemap(const AtomicStringImpl&, HTMLImageElement&);
>- void removeImageElementByUsemap(const AtomicStringImpl&, HTMLImageElement&);
>- HTMLImageElement* imageElementByUsemap(const AtomicStringImpl&) const;
>+ void addImageElementByUsemap(const AtomStringImpl&, HTMLImageElement&);
>+ void removeImageElementByUsemap(const AtomStringImpl&, HTMLImageElement&);
>+ HTMLImageElement* imageElementByUsemap(const AtomStringImpl&) const;
> 
> // For accessibility.
> bool shouldCacheLabelsByForAttribute() const { return !!m_labelsByForAttribute; }
>- void addLabel(const AtomicStringImpl& forAttributeValue, HTMLLabelElement&);
>- void removeLabel(const AtomicStringImpl& forAttributeValue, HTMLLabelElement&);
>- HTMLLabelElement* labelElementForId(const AtomicString& forAttributeValue);
>+ void addLabel(const AtomStringImpl& forAttributeValue, HTMLLabelElement&);
>+ void removeLabel(const AtomStringImpl& forAttributeValue, HTMLLabelElement&);
>+ HTMLLabelElement* labelElementForId(const AtomString& forAttributeValue);
> 
> WEBCORE_EXPORT RefPtr<Element> elementFromPoint(double clientX, double clientY);
> WEBCORE_EXPORT Vector<RefPtr<Element>> elementsFromPoint(double clientX, double clientY);
>@@ -137,22 +137,22 @@ private:
> std::unique_ptr<IdTargetObserverRegistry> m_idTargetObserverRegistry;
> };
> 
>-inline bool TreeScope::hasElementWithId(const AtomicStringImpl& id) const
>+inline bool TreeScope::hasElementWithId(const AtomStringImpl& id) const
> {
> return m_elementsById && m_elementsById->contains(id);
> }
> 
>-inline bool TreeScope::containsMultipleElementsWithId(const AtomicString& id) const
>+inline bool TreeScope::containsMultipleElementsWithId(const AtomString& id) const
> {
> return m_elementsById && id.impl() && m_elementsById->containsMultiple(*id.impl());
> }
> 
>-inline bool TreeScope::hasElementWithName(const AtomicStringImpl& id) const
>+inline bool TreeScope::hasElementWithName(const AtomStringImpl& id) const
> {
> return m_elementsByName && m_elementsByName->contains(id);
> }
> 
>-inline bool TreeScope::containsMultipleElementsWithName(const AtomicString& name) const
>+inline bool TreeScope::containsMultipleElementsWithName(const AtomString& name) const
> {
> return m_elementsByName && name.impl() && m_elementsByName->containsMultiple(*name.impl());
> }
>diff --git a/Source/WebCore/dom/TreeScopeOrderedMap.cpp b/Source/WebCore/dom/TreeScopeOrderedMap.cpp
>index 6906387a3efd747b5bc84de0e2bbd8eaf6ce74fe..57dce5b25fa4329a868cabd147a84810d374d192 100644
>--- a/Source/WebCore/dom/TreeScopeOrderedMap.cpp
>+++ b/Source/WebCore/dom/TreeScopeOrderedMap.cpp
>@@ -47,7 +47,7 @@ void TreeScopeOrderedMap::clear()
> m_map.clear();
> }
> 
>-void TreeScopeOrderedMap::add(const AtomicStringImpl& key, Element& element, const TreeScope& treeScope)
>+void TreeScopeOrderedMap::add(const AtomStringImpl& key, Element& element, const TreeScope& treeScope)
> {
> RELEASE_ASSERT_WITH_SECURITY_IMPLICATION(&element.treeScope() == &treeScope);
> ASSERT_WITH_SECURITY_IMPLICATION(treeScope.rootNode().containsIncludingShadowDOM(&element));
>@@ -73,7 +73,7 @@ void TreeScopeOrderedMap::add(const AtomicStringImpl& key, Element& element, con
> entry.orderedList.clear();
> }
> 
>-void TreeScopeOrderedMap::remove(const AtomicStringImpl& key, Element& element)
>+void TreeScopeOrderedMap::remove(const AtomStringImpl& key, Element& element)
> {
> m_map.checkConsistency();
> auto it = m_map.find(&key);
>@@ -95,7 +95,7 @@ void TreeScopeOrderedMap::remove(const AtomicStringImpl& key, Element& element)
> }
> 
> template <typename KeyMatchingFunction>
>-inline Element* TreeScopeOrderedMap::get(const AtomicStringImpl& key, const TreeScope& scope, const KeyMatchingFunction& keyMatches) const
>+inline Element* TreeScopeOrderedMap::get(const AtomStringImpl& key, const TreeScope& scope, const KeyMatchingFunction& keyMatches) const
> {
> m_map.checkConsistency();
> 
>@@ -142,57 +142,57 @@ inline Element* TreeScopeOrderedMap::get(const AtomicStringImpl& key, const Tree
> return nullptr;
> }
> 
>-Element* TreeScopeOrderedMap::getElementById(const AtomicStringImpl& key, const TreeScope& scope) const
>+Element* TreeScopeOrderedMap::getElementById(const AtomStringImpl& key, const TreeScope& scope) const
> {
>- return get(key, scope, [] (const AtomicStringImpl& key, const Element& element) {
>+ return get(key, scope, [] (const AtomStringImpl& key, const Element& element) {
> return element.getIdAttribute().impl() == &key;
> });
> }
> 
>-Element* TreeScopeOrderedMap::getElementByName(const AtomicStringImpl& key, const TreeScope& scope) const
>+Element* TreeScopeOrderedMap::getElementByName(const AtomStringImpl& key, const TreeScope& scope) const
> {
>- return get(key, scope, [] (const AtomicStringImpl& key, const Element& element) {
>+ return get(key, scope, [] (const AtomStringImpl& key, const Element& element) {
> return element.getNameAttribute().impl() == &key;
> });
> }
> 
>-HTMLMapElement* TreeScopeOrderedMap::getElementByMapName(const AtomicStringImpl& key, const TreeScope& scope) const
>+HTMLMapElement* TreeScopeOrderedMap::getElementByMapName(const AtomStringImpl& key, const TreeScope& scope) const
> {
>- return downcast<HTMLMapElement>(get(key, scope, [] (const AtomicStringImpl& key, const Element& element) {
>+ return downcast<HTMLMapElement>(get(key, scope, [] (const AtomStringImpl& key, const Element& element) {
> return is<HTMLMapElement>(element) && downcast<HTMLMapElement>(element).getName().impl() == &key;
> }));
> }
> 
>-HTMLImageElement* TreeScopeOrderedMap::getElementByUsemap(const AtomicStringImpl& key, const TreeScope& scope) const
>+HTMLImageElement* TreeScopeOrderedMap::getElementByUsemap(const AtomStringImpl& key, const TreeScope& scope) const
> {
>- return downcast<HTMLImageElement>(get(key, scope, [] (const AtomicStringImpl& key, const Element& element) {
>+ return downcast<HTMLImageElement>(get(key, scope, [] (const AtomStringImpl& key, const Element& element) {
> // FIXME: HTML5 specification says we should match both image and object elements.
> return is<HTMLImageElement>(element) && downcast<HTMLImageElement>(element).matchesUsemap(key);
> }));
> }
> 
>-HTMLLabelElement* TreeScopeOrderedMap::getElementByLabelForAttribute(const AtomicStringImpl& key, const TreeScope& scope) const
>+HTMLLabelElement* TreeScopeOrderedMap::getElementByLabelForAttribute(const AtomStringImpl& key, const TreeScope& scope) const
> {
>- return downcast<HTMLLabelElement>(get(key, scope, [] (const AtomicStringImpl& key, const Element& element) {
>+ return downcast<HTMLLabelElement>(get(key, scope, [] (const AtomStringImpl& key, const Element& element) {
> return is<HTMLLabelElement>(element) && element.attributeWithoutSynchronization(forAttr).impl() == &key;
> }));
> }
> 
>-Element* TreeScopeOrderedMap::getElementByWindowNamedItem(const AtomicStringImpl& key, const TreeScope& scope) const
>+Element* TreeScopeOrderedMap::getElementByWindowNamedItem(const AtomStringImpl& key, const TreeScope& scope) const
> {
>- return get(key, scope, [] (const AtomicStringImpl& key, const Element& element) {
>+ return get(key, scope, [] (const AtomStringImpl& key, const Element& element) {
> return WindowNameCollection::elementMatches(element, &key);
> });
> }
> 
>-Element* TreeScopeOrderedMap::getElementByDocumentNamedItem(const AtomicStringImpl& key, const TreeScope& scope) const
>+Element* TreeScopeOrderedMap::getElementByDocumentNamedItem(const AtomStringImpl& key, const TreeScope& scope) const
> {
>- return get(key, scope, [] (const AtomicStringImpl& key, const Element& element) {
>+ return get(key, scope, [] (const AtomStringImpl& key, const Element& element) {
> return DocumentNameCollection::elementMatches(element, &key);
> });
> }
> 
>-const Vector<Element*>* TreeScopeOrderedMap::getAllElementsById(const AtomicStringImpl& key, const TreeScope& scope) const
>+const Vector<Element*>* TreeScopeOrderedMap::getAllElementsById(const AtomStringImpl& key, const TreeScope& scope) const
> {
> m_map.checkConsistency();
> 
>diff --git a/Source/WebCore/dom/TreeScopeOrderedMap.h b/Source/WebCore/dom/TreeScopeOrderedMap.h
>index d2e52ccfb86489f1297e35aa6664c9954f4bfac5..59752791e76ef9fb62ea8c6fbe2a0ac8d12f56ee 100644
>--- a/Source/WebCore/dom/TreeScopeOrderedMap.h
>+++ b/Source/WebCore/dom/TreeScopeOrderedMap.h
>@@ -33,7 +33,7 @@
> #include <wtf/HashMap.h>
> #include <wtf/HashSet.h>
> #include <wtf/Vector.h>
>-#include <wtf/text/AtomicStringImpl.h>
>+#include <wtf/text/AtomStringImpl.h>
> 
> namespace WebCore {
> 
>@@ -46,28 +46,28 @@ class TreeScope;
> class TreeScopeOrderedMap {
> WTF_MAKE_FAST_ALLOCATED;
> public:
>- void add(const AtomicStringImpl&, Element&, const TreeScope&);
>- void remove(const AtomicStringImpl&, Element&);
>+ void add(const AtomStringImpl&, Element&, const TreeScope&);
>+ void remove(const AtomStringImpl&, Element&);
> void clear();
> 
>- bool contains(const AtomicStringImpl&) const;
>- bool containsSingle(const AtomicStringImpl&) const;
>- bool containsMultiple(const AtomicStringImpl&) const;
>+ bool contains(const AtomStringImpl&) const;
>+ bool containsSingle(const AtomStringImpl&) const;
>+ bool containsMultiple(const AtomStringImpl&) const;
> 
> // concrete instantiations of the get<>() method template
>- Element* getElementById(const AtomicStringImpl&, const TreeScope&) const;
>- Element* getElementByName(const AtomicStringImpl&, const TreeScope&) const;
>- HTMLMapElement* getElementByMapName(const AtomicStringImpl&, const TreeScope&) const;
>- HTMLImageElement* getElementByUsemap(const AtomicStringImpl&, const TreeScope&) const;
>- HTMLLabelElement* getElementByLabelForAttribute(const AtomicStringImpl&, const TreeScope&) const;
>- Element* getElementByWindowNamedItem(const AtomicStringImpl&, const TreeScope&) const;
>- Element* getElementByDocumentNamedItem(const AtomicStringImpl&, const TreeScope&) const;
>+ Element* getElementById(const AtomStringImpl&, const TreeScope&) const;
>+ Element* getElementByName(const AtomStringImpl&, const TreeScope&) const;
>+ HTMLMapElement* getElementByMapName(const AtomStringImpl&, const TreeScope&) const;
>+ HTMLImageElement* getElementByUsemap(const AtomStringImpl&, const TreeScope&) const;
>+ HTMLLabelElement* getElementByLabelForAttribute(const AtomStringImpl&, const TreeScope&) const;
>+ Element* getElementByWindowNamedItem(const AtomStringImpl&, const TreeScope&) const;
>+ Element* getElementByDocumentNamedItem(const AtomStringImpl&, const TreeScope&) const;
> 
>- const Vector<Element*>* getAllElementsById(const AtomicStringImpl&, const TreeScope&) const;
>+ const Vector<Element*>* getAllElementsById(const AtomStringImpl&, const TreeScope&) const;
> 
> private:
> template <typename KeyMatchingFunction>
>- Element* get(const AtomicStringImpl&, const TreeScope&, const KeyMatchingFunction&) const;
>+ Element* get(const AtomStringImpl&, const TreeScope&, const KeyMatchingFunction&) const;
> 
> struct MapEntry {
> MapEntry() { }
>@@ -84,23 +84,23 @@ private:
> #endif
> };
> 
>- typedef HashMap<const AtomicStringImpl*, MapEntry> Map;
>+ typedef HashMap<const AtomStringImpl*, MapEntry> Map;
> 
> mutable Map m_map;
> };
> 
>-inline bool TreeScopeOrderedMap::containsSingle(const AtomicStringImpl& id) const
>+inline bool TreeScopeOrderedMap::containsSingle(const AtomStringImpl& id) const
> {
> auto it = m_map.find(&id);
> return it != m_map.end() && it->value.count == 1;
> }
> 
>-inline bool TreeScopeOrderedMap::contains(const AtomicStringImpl& id) const
>+inline bool TreeScopeOrderedMap::contains(const AtomStringImpl& id) const
> {
> return m_map.contains(&id);
> }
> 
>-inline bool TreeScopeOrderedMap::containsMultiple(const AtomicStringImpl& id) const
>+inline bool TreeScopeOrderedMap::containsMultiple(const AtomStringImpl& id) const
> {
> auto it = m_map.find(&id);
> return it != m_map.end() && it->value.count > 1;
>diff --git a/Source/WebCore/dom/UIEvent.cpp b/Source/WebCore/dom/UIEvent.cpp
>index 42f12e977331818bfaeca8d49a0c233140547ead..87f8d044e59706eeb0819a6a79c32417ab5f71a6 100644
>--- a/Source/WebCore/dom/UIEvent.cpp
>+++ b/Source/WebCore/dom/UIEvent.cpp
>@@ -32,21 +32,21 @@ UIEvent::UIEvent()
> {
> }
> 
>-UIEvent::UIEvent(const AtomicString& eventType, CanBubble canBubble, IsCancelable isCancelable, IsComposed isComposed, RefPtr<WindowProxy>&& viewArg, int detailArg)
>+UIEvent::UIEvent(const AtomString& eventType, CanBubble canBubble, IsCancelable isCancelable, IsComposed isComposed, RefPtr<WindowProxy>&& viewArg, int detailArg)
> : Event(eventType, canBubble, isCancelable, isComposed)
> , m_view(WTFMove(viewArg))
> , m_detail(detailArg)
> {
> }
> 
>-UIEvent::UIEvent(const AtomicString& eventType, CanBubble canBubble, IsCancelable isCancelable, IsComposed isComposed, MonotonicTime timestamp, RefPtr<WindowProxy>&& viewArg, int detailArg, IsTrusted isTrusted)
>+UIEvent::UIEvent(const AtomString& eventType, CanBubble canBubble, IsCancelable isCancelable, IsComposed isComposed, MonotonicTime timestamp, RefPtr<WindowProxy>&& viewArg, int detailArg, IsTrusted isTrusted)
> : Event(eventType, canBubble, isCancelable, isComposed, timestamp, isTrusted)
> , m_view(WTFMove(viewArg))
> , m_detail(detailArg)
> {
> }
> 
>-UIEvent::UIEvent(const AtomicString& eventType, const UIEventInit& initializer)
>+UIEvent::UIEvent(const AtomString& eventType, const UIEventInit& initializer)
> : Event(eventType, initializer, IsTrusted::No)
> , m_view(initializer.view.get())
> , m_detail(initializer.detail)
>@@ -55,7 +55,7 @@ UIEvent::UIEvent(const AtomicString& eventType, const UIEventInit& initializer)
> 
> UIEvent::~UIEvent() = default;
> 
>-void UIEvent::initUIEvent(const AtomicString& typeArg, bool canBubbleArg, bool cancelableArg, RefPtr<WindowProxy>&& viewArg, int detailArg)
>+void UIEvent::initUIEvent(const AtomString& typeArg, bool canBubbleArg, bool cancelableArg, RefPtr<WindowProxy>&& viewArg, int detailArg)
> {
> if (isBeingDispatched())
> return;
>diff --git a/Source/WebCore/dom/UIEvent.h b/Source/WebCore/dom/UIEvent.h
>index 9333f039a7b47c2cde96346fc9e25982d03b16da..ec2eee78df8943fbc5c818705a7cbc2bde746fec 100644
>--- a/Source/WebCore/dom/UIEvent.h
>+++ b/Source/WebCore/dom/UIEvent.h
>@@ -34,7 +34,7 @@ typedef WindowProxy AbstractView;
> 
> class UIEvent : public Event {
> public:
>- static Ref<UIEvent> create(const AtomicString& type, CanBubble canBubble, IsCancelable isCancelable, IsComposed isComposed, RefPtr<WindowProxy>&& view, int detail)
>+ static Ref<UIEvent> create(const AtomString& type, CanBubble canBubble, IsCancelable isCancelable, IsComposed isComposed, RefPtr<WindowProxy>&& view, int detail)
> {
> return adoptRef(*new UIEvent(type, canBubble, isCancelable, isComposed, WTFMove(view), detail));
> }
>@@ -42,13 +42,13 @@ public:
> {
> return adoptRef(*new UIEvent);
> }
>- static Ref<UIEvent> create(const AtomicString& type, const UIEventInit& initializer)
>+ static Ref<UIEvent> create(const AtomString& type, const UIEventInit& initializer)
> {
> return adoptRef(*new UIEvent(type, initializer));
> }
> virtual ~UIEvent();
> 
>- WEBCORE_EXPORT void initUIEvent(const AtomicString& type, bool canBubble, bool cancelable, RefPtr<WindowProxy>&&, int detail);
>+ WEBCORE_EXPORT void initUIEvent(const AtomString& type, bool canBubble, bool cancelable, RefPtr<WindowProxy>&&, int detail);
> 
> WindowProxy* view() const { return m_view.get(); }
> int detail() const { return m_detail; }
>@@ -66,9 +66,9 @@ public:
> protected:
> UIEvent();
> 
>- UIEvent(const AtomicString& type, CanBubble, IsCancelable, IsComposed, RefPtr<WindowProxy>&&, int detail);
>- UIEvent(const AtomicString& type, CanBubble, IsCancelable, IsComposed, MonotonicTime timestamp, RefPtr<WindowProxy>&&, int detail, IsTrusted = IsTrusted::Yes);
>- UIEvent(const AtomicString&, const UIEventInit&);
>+ UIEvent(const AtomString& type, CanBubble, IsCancelable, IsComposed, RefPtr<WindowProxy>&&, int detail);
>+ UIEvent(const AtomString& type, CanBubble, IsCancelable, IsComposed, MonotonicTime timestamp, RefPtr<WindowProxy>&&, int detail, IsTrusted = IsTrusted::Yes);
>+ UIEvent(const AtomString&, const UIEventInit&);
> 
> private:
> bool isUIEvent() const final;
>diff --git a/Source/WebCore/dom/UIEventWithKeyState.h b/Source/WebCore/dom/UIEventWithKeyState.h
>index 1b5abd5b06b66bf764ec6fb69a02b24e9876415f..a8fc1433525832ad73cab7813ca7e162433e2f0c 100644
>--- a/Source/WebCore/dom/UIEventWithKeyState.h
>+++ b/Source/WebCore/dom/UIEventWithKeyState.h
>@@ -47,21 +47,21 @@ public:
> protected:
> UIEventWithKeyState() = default;
> 
>- UIEventWithKeyState(const AtomicString& type, CanBubble canBubble, IsCancelable cancelable, IsComposed isComposed,
>+ UIEventWithKeyState(const AtomString& type, CanBubble canBubble, IsCancelable cancelable, IsComposed isComposed,
> RefPtr<WindowProxy>&& view, int detail, OptionSet<Modifier> modifiers)
> : UIEvent(type, canBubble, cancelable, isComposed, WTFMove(view), detail)
> , m_modifiers(modifiers)
> {
> }
> 
>- UIEventWithKeyState(const AtomicString& type, CanBubble canBubble, IsCancelable cancelable, IsComposed isComposed,
>+ UIEventWithKeyState(const AtomString& type, CanBubble canBubble, IsCancelable cancelable, IsComposed isComposed,
> MonotonicTime timestamp, RefPtr<WindowProxy>&& view, int detail, OptionSet<Modifier> modifiers, IsTrusted isTrusted)
> : UIEvent(type, canBubble, cancelable, isComposed, timestamp, WTFMove(view), detail, isTrusted)
> , m_modifiers(modifiers)
> {
> }
> 
>- UIEventWithKeyState(const AtomicString& type, const EventModifierInit& initializer)
>+ UIEventWithKeyState(const AtomString& type, const EventModifierInit& initializer)
> : UIEvent(type, initializer)
> , m_modifiers(modifiersFromInitializer(initializer))
> {
>diff --git a/Source/WebCore/dom/VisitedLinkState.cpp b/Source/WebCore/dom/VisitedLinkState.cpp
>index 61297b2bb9bf0ad3e0b95382976427a6d33432fc..a03af147f39c21e4ef777bfcbf4411d14aab0c81 100644
>--- a/Source/WebCore/dom/VisitedLinkState.cpp
>+++ b/Source/WebCore/dom/VisitedLinkState.cpp
>@@ -42,7 +42,7 @@ namespace WebCore {
> 
> using namespace HTMLNames;
> 
>-inline static const AtomicString* linkAttribute(const Element& element)
>+inline static const AtomString* linkAttribute(const Element& element)
> {
> if (!element.isLink())
> return nullptr;
>@@ -91,7 +91,7 @@ InsideLink VisitedLinkState::determineLinkStateSlowCase(const Element& element)
> {
> ASSERT(element.isLink());
> 
>- const AtomicString* attribute = linkAttribute(element);
>+ const AtomString* attribute = linkAttribute(element);
> if (!attribute || attribute->isNull())
> return InsideLink::NotInside;
> 
>diff --git a/Source/WebCore/dom/WebKitAnimationEvent.cpp b/Source/WebCore/dom/WebKitAnimationEvent.cpp
>index 38733f9bfbf7855085cb895428d826a516112084..f04c9095878b922d2693cbccb94b79d6221673f6 100644
>--- a/Source/WebCore/dom/WebKitAnimationEvent.cpp
>+++ b/Source/WebCore/dom/WebKitAnimationEvent.cpp
>@@ -28,14 +28,14 @@
> 
> namespace WebCore {
> 
>-WebKitAnimationEvent::WebKitAnimationEvent(const AtomicString& type, const Init& initializer, IsTrusted isTrusted)
>+WebKitAnimationEvent::WebKitAnimationEvent(const AtomString& type, const Init& initializer, IsTrusted isTrusted)
> : Event(type, initializer, isTrusted)
> , m_animationName(initializer.animationName)
> , m_elapsedTime(initializer.elapsedTime)
> {
> }
> 
>-WebKitAnimationEvent::WebKitAnimationEvent(const AtomicString& type, const String& animationName, double elapsedTime)
>+WebKitAnimationEvent::WebKitAnimationEvent(const AtomString& type, const String& animationName, double elapsedTime)
> : Event(type, CanBubble::Yes, IsCancelable::Yes)
> , m_animationName(animationName)
> , m_elapsedTime(elapsedTime)
>diff --git a/Source/WebCore/dom/WebKitAnimationEvent.h b/Source/WebCore/dom/WebKitAnimationEvent.h
>index 5506b619745a2515bc00941ce9b17675734cadf8..9c7a51a18aeeda35eb04f73b4e6e95994fad067c 100644
>--- a/Source/WebCore/dom/WebKitAnimationEvent.h
>+++ b/Source/WebCore/dom/WebKitAnimationEvent.h
>@@ -31,7 +31,7 @@ namespace WebCore {
> 
> class WebKitAnimationEvent final : public Event {
> public:
>- static Ref<WebKitAnimationEvent> create(const AtomicString& type, const String& animationName, double elapsedTime)
>+ static Ref<WebKitAnimationEvent> create(const AtomString& type, const String& animationName, double elapsedTime)
> {
> return adoptRef(*new WebKitAnimationEvent(type, animationName, elapsedTime));
> }
>@@ -41,7 +41,7 @@ public:
> double elapsedTime { 0.0 };
> };
> 
>- static Ref<WebKitAnimationEvent> create(const AtomicString& type, const Init& initializer, IsTrusted isTrusted = IsTrusted::No)
>+ static Ref<WebKitAnimationEvent> create(const AtomString& type, const Init& initializer, IsTrusted isTrusted = IsTrusted::No)
> {
> return adoptRef(*new WebKitAnimationEvent(type, initializer, isTrusted));
> }
>@@ -54,8 +54,8 @@ public:
> EventInterface eventInterface() const override;
> 
> private:
>- WebKitAnimationEvent(const AtomicString& type, const String& animationName, double elapsedTime);
>- WebKitAnimationEvent(const AtomicString&, const Init&, IsTrusted);
>+ WebKitAnimationEvent(const AtomString& type, const String& animationName, double elapsedTime);
>+ WebKitAnimationEvent(const AtomString&, const Init&, IsTrusted);
> 
> String m_animationName;
> double m_elapsedTime;
>diff --git a/Source/WebCore/dom/WebKitTransitionEvent.cpp b/Source/WebCore/dom/WebKitTransitionEvent.cpp
>index dab9bd1f04e57c596d7a5bac62dd8451596b26f7..f4ee465981a55aa8bfadc88c7a762d8288a4e7a0 100644
>--- a/Source/WebCore/dom/WebKitTransitionEvent.cpp
>+++ b/Source/WebCore/dom/WebKitTransitionEvent.cpp
>@@ -28,7 +28,7 @@
> 
> namespace WebCore {
> 
>-WebKitTransitionEvent::WebKitTransitionEvent(const AtomicString& type, const String& propertyName, double elapsedTime, const String& pseudoElement)
>+WebKitTransitionEvent::WebKitTransitionEvent(const AtomString& type, const String& propertyName, double elapsedTime, const String& pseudoElement)
> : Event(type, CanBubble::Yes, IsCancelable::Yes)
> , m_propertyName(propertyName)
> , m_elapsedTime(elapsedTime)
>@@ -36,7 +36,7 @@ WebKitTransitionEvent::WebKitTransitionEvent(const AtomicString& type, const Str
> {
> }
> 
>-WebKitTransitionEvent::WebKitTransitionEvent(const AtomicString& type, const Init& initializer, IsTrusted isTrusted)
>+WebKitTransitionEvent::WebKitTransitionEvent(const AtomString& type, const Init& initializer, IsTrusted isTrusted)
> : Event(type, initializer, isTrusted)
> , m_propertyName(initializer.propertyName)
> , m_elapsedTime(initializer.elapsedTime)
>diff --git a/Source/WebCore/dom/WebKitTransitionEvent.h b/Source/WebCore/dom/WebKitTransitionEvent.h
>index 76643ff62e59a89207f17d60053d73132d3ab94f..84337471cb0911530f76b26cbd1afe32c5dd5ead 100644
>--- a/Source/WebCore/dom/WebKitTransitionEvent.h
>+++ b/Source/WebCore/dom/WebKitTransitionEvent.h
>@@ -31,7 +31,7 @@ namespace WebCore {
> 
> class WebKitTransitionEvent final : public Event {
> public:
>- static Ref<WebKitTransitionEvent> create(const AtomicString& type, const String& propertyName, double elapsedTime, const String& pseudoElement)
>+ static Ref<WebKitTransitionEvent> create(const AtomString& type, const String& propertyName, double elapsedTime, const String& pseudoElement)
> {
> return adoptRef(*new WebKitTransitionEvent(type, propertyName, elapsedTime, pseudoElement));
> }
>@@ -42,7 +42,7 @@ public:
> String pseudoElement;
> };
> 
>- static Ref<WebKitTransitionEvent> create(const AtomicString& type, const Init& initializer, IsTrusted isTrusted = IsTrusted::No)
>+ static Ref<WebKitTransitionEvent> create(const AtomString& type, const Init& initializer, IsTrusted isTrusted = IsTrusted::No)
> {
> return adoptRef(*new WebKitTransitionEvent(type, initializer, isTrusted));
> }
>@@ -56,8 +56,8 @@ public:
> EventInterface eventInterface() const override;
> 
> private:
>- WebKitTransitionEvent(const AtomicString& type, const String& propertyName, double elapsedTime, const String& pseudoElement);
>- WebKitTransitionEvent(const AtomicString& type, const Init& initializer, IsTrusted);
>+ WebKitTransitionEvent(const AtomString& type, const String& propertyName, double elapsedTime, const String& pseudoElement);
>+ WebKitTransitionEvent(const AtomString& type, const Init& initializer, IsTrusted);
> 
> String m_propertyName;
> double m_elapsedTime;
>diff --git a/Source/WebCore/dom/WheelEvent.cpp b/Source/WebCore/dom/WheelEvent.cpp
>index 37e07104463a4d3766c34980c79a3da922db7c1f..4d45195e0ec84f463dcf916422e3a625a9d6b8b0 100644
>--- a/Source/WebCore/dom/WheelEvent.cpp
>+++ b/Source/WebCore/dom/WheelEvent.cpp
>@@ -37,7 +37,7 @@ inline static unsigned determineDeltaMode(const PlatformWheelEvent& event)
> 
> inline WheelEvent::WheelEvent() = default;
> 
>-inline WheelEvent::WheelEvent(const AtomicString& type, const Init& initializer)
>+inline WheelEvent::WheelEvent(const AtomString& type, const Init& initializer)
> : MouseEvent(type, initializer)
> , m_wheelDelta(initializer.wheelDeltaX ? initializer.wheelDeltaX : -initializer.deltaX, initializer.wheelDeltaY ? initializer.wheelDeltaY : -initializer.deltaY)
> , m_deltaX(initializer.deltaX ? initializer.deltaX : -initializer.wheelDeltaX)
>@@ -68,7 +68,7 @@ Ref<WheelEvent> WheelEvent::createForBindings()
> return adoptRef(*new WheelEvent);
> }
> 
>-Ref<WheelEvent> WheelEvent::create(const AtomicString& type, const Init& initializer)
>+Ref<WheelEvent> WheelEvent::create(const AtomString& type, const Init& initializer)
> {
> return adoptRef(*new WheelEvent(type, initializer));
> }
>diff --git a/Source/WebCore/dom/WheelEvent.h b/Source/WebCore/dom/WheelEvent.h
>index 366157e9d32845a82cf54cc76786211f60b3c422..450436bfdf9ac97b5586f1852b4c2b4fd1291006 100644
>--- a/Source/WebCore/dom/WheelEvent.h
>+++ b/Source/WebCore/dom/WheelEvent.h
>@@ -51,7 +51,7 @@ public:
> int wheelDeltaY { 0 }; // Deprecated.
> };
> 
>- static Ref<WheelEvent> create(const AtomicString& type, const Init&);
>+ static Ref<WheelEvent> create(const AtomString& type, const Init&);
> 
> WEBCORE_EXPORT void initWebKitWheelEvent(int rawDeltaX, int rawDeltaY, RefPtr<WindowProxy>&&, int screenX, int screenY, int pageX, int pageY, bool ctrlKey, bool altKey, bool shiftKey, bool metaKey);
> 
>@@ -74,7 +74,7 @@ public:
> 
> private:
> WheelEvent();
>- WheelEvent(const AtomicString&, const Init&);
>+ WheelEvent(const AtomString&, const Init&);
> WheelEvent(const PlatformWheelEvent&, RefPtr<WindowProxy>&&);
> 
> EventInterface eventInterface() const final;
>diff --git a/Source/WebCore/dom/ios/MouseEventIOS.cpp b/Source/WebCore/dom/ios/MouseEventIOS.cpp
>index 302e1fee1fdbf6150a4937e689fd050258bc3b61..d24458840c6a0c7844fe36ded588a6780ed5a0f2 100644
>--- a/Source/WebCore/dom/ios/MouseEventIOS.cpp
>+++ b/Source/WebCore/dom/ios/MouseEventIOS.cpp
>@@ -32,7 +32,7 @@
> 
> namespace WebCore {
> 
>-static AtomicString mouseEventType(PlatformTouchPoint::TouchPhaseType phase)
>+static AtomString mouseEventType(PlatformTouchPoint::TouchPhaseType phase)
> {
> switch (phase) {
> case PlatformTouchPoint::TouchPhaseBegan:
>diff --git a/Source/WebCore/dom/ios/PointerEventIOS.cpp b/Source/WebCore/dom/ios/PointerEventIOS.cpp
>index 0e3c076719d136ce75fa06c798aeaef400bd4838..11f82fed672bed6e034cc60a88232b85c515bb7e 100644
>--- a/Source/WebCore/dom/ios/PointerEventIOS.cpp
>+++ b/Source/WebCore/dom/ios/PointerEventIOS.cpp
>@@ -32,7 +32,7 @@
> 
> namespace WebCore {
> 
>-static const AtomicString& pointerEventType(PlatformTouchPoint::TouchPhaseType phase)
>+static const AtomString& pointerEventType(PlatformTouchPoint::TouchPhaseType phase)
> {
> switch (phase) {
> case PlatformTouchPoint::TouchPhaseBegan:
>@@ -61,7 +61,7 @@ Ref<PointerEvent> PointerEvent::create(const String& type, const PlatformTouchEv
> return adoptRef(*new PointerEvent(type, event, typeIsCancelable(type), index, isPrimary, WTFMove(view)));
> }
> 
>-PointerEvent::PointerEvent(const AtomicString& type, const PlatformTouchEvent& event, IsCancelable isCancelable, unsigned index, bool isPrimary, Ref<WindowProxy>&& view)
>+PointerEvent::PointerEvent(const AtomString& type, const PlatformTouchEvent& event, IsCancelable isCancelable, unsigned index, bool isPrimary, Ref<WindowProxy>&& view)
> : MouseEvent(type, typeCanBubble(type), isCancelable, typeIsComposed(type), event.timestamp().approximateMonotonicTime(), WTFMove(view), 0, event.touchLocationAtIndex(index), event.touchLocationAtIndex(index), { }, event.modifiers(), 0, 0, nullptr, 0, 0, nullptr, IsSimulated::No, IsTrusted::Yes)
> , m_pointerId(event.touchIdentifierAtIndex(index))
> , m_width(2 * event.radiusXAtIndex(index))
>diff --git a/Source/WebCore/dom/make_names.pl b/Source/WebCore/dom/make_names.pl
>index 3bae491d72bebd533197473a387c1d650665aa65..d951ff0651779784c59a87d1e8df82d1390aa680 100755
>--- a/Source/WebCore/dom/make_names.pl
>+++ b/Source/WebCore/dom/make_names.pl
>@@ -112,10 +112,10 @@ if (length($fontNamesIn)) {
> printLicenseHeader($F);
> printHeaderHead($F, "CSS", $familyNamesFileBase, <<END, "");
> #include <wtf/NeverDestroyed.h>
>-#include <wtf/text/AtomicString.h>
>+#include <wtf/text/AtomString.h>
> END
> 
>- printMacros($F, "extern LazyNeverDestroyed<const WTF::AtomicString>", "", \%parameters);
>+ printMacros($F, "extern LazyNeverDestroyed<const WTF::AtomString>", "", \%parameters);
> print F "#endif\n\n";
> 
> printInit($F, 1);
>@@ -129,7 +129,7 @@ END
> 
> print F StaticString::GenerateStrings(\%parameters);
> 
>- printMacros($F, "LazyNeverDestroyed<const WTF::AtomicString>", "", \%parameters);
>+ printMacros($F, "LazyNeverDestroyed<const WTF::AtomString>", "", \%parameters);
> 
> printInit($F, 0);
> 
>@@ -596,7 +596,7 @@ print F "\nvoid init()
> 
> // Use placement new to initialize the globals.
> 
>- AtomicString::init();
>+ AtomString::init();
> ";
> }
> 
>@@ -715,14 +715,14 @@ sub printNamesHeaderFile
> printLicenseHeader($F);
> printHeaderHead($F, "DOM", $parameters{namespace}, <<END, "class $parameters{namespace}QualifiedName : public QualifiedName { };\n\n");
> #include <wtf/NeverDestroyed.h>
>-#include <wtf/text/AtomicString.h>
>+#include <wtf/text/AtomString.h>
> #include "QualifiedName.h"
> END
> 
> my $lowercaseNamespacePrefix = lc($parameters{namespacePrefix});
> 
> print F "// Namespace\n";
>- print F "WEBCORE_EXPORT extern LazyNeverDestroyed<const WTF::AtomicString> ${lowercaseNamespacePrefix}NamespaceURI;\n\n";
>+ print F "WEBCORE_EXPORT extern LazyNeverDestroyed<const WTF::AtomString> ${lowercaseNamespacePrefix}NamespaceURI;\n\n";
> 
> if (keys %allTags) {
> print F "// Tags\n";
>@@ -760,7 +760,7 @@ sub printNamesCppFile
> 
> my $lowercaseNamespacePrefix = lc($parameters{namespacePrefix});
> 
>- print F "LazyNeverDestroyed<const AtomicString> ${lowercaseNamespacePrefix}NamespaceURI;\n\n";
>+ print F "LazyNeverDestroyed<const AtomString> ${lowercaseNamespacePrefix}NamespaceURI;\n\n";
> 
> print F StaticString::GenerateStrings(\%allStrings);
> 
>@@ -797,7 +797,7 @@ sub printNamesCppFile
> 
> printInit($F, 0);
> 
>- print(F " AtomicString ${lowercaseNamespacePrefix}NS(\"$parameters{namespaceURI}\", AtomicString::ConstructFromLiteral);\n\n");
>+ print(F " AtomString ${lowercaseNamespacePrefix}NS(\"$parameters{namespaceURI}\", AtomString::ConstructFromLiteral);\n\n");
> 
> print(F " // Namespace\n");
> print(F " ${lowercaseNamespacePrefix}NamespaceURI.construct(${lowercaseNamespacePrefix}NS);\n");
>@@ -919,7 +919,7 @@ print F <<END;
> };
> 
> for (auto& entry : ${type}Table)
>- entry.targetAddress->construct(nullAtom(), AtomicString(&entry.name), $namespaceURI);
>+ entry.targetAddress->construct(nullAtom(), AtomString(&entry.name), $namespaceURI);
> END
> 
> }
>@@ -1004,7 +1004,7 @@ struct $parameters{namespace}ConstructorFunctionMapEntry {
> const QualifiedName* qualifiedName; // Use pointer instead of reference so that emptyValue() in HashMap is cheap to create.
> };
> 
>-static NEVER_INLINE HashMap<AtomicStringImpl*, $parameters{namespace}ConstructorFunctionMapEntry> create$parameters{namespace}FactoryMap()
>+static NEVER_INLINE HashMap<AtomStringImpl*, $parameters{namespace}ConstructorFunctionMapEntry> create$parameters{namespace}FactoryMap()
> {
> struct TableEntry {
> const QualifiedName& name;
>@@ -1020,19 +1020,19 @@ END
> print F <<END
> };
> 
>- HashMap<AtomicStringImpl*, $parameters{namespace}ConstructorFunctionMapEntry> map;
>+ HashMap<AtomStringImpl*, $parameters{namespace}ConstructorFunctionMapEntry> map;
> for (auto& entry : table)
> map.add(entry.name.localName().impl(), $parameters{namespace}ConstructorFunctionMapEntry(entry.function, entry.name));
> return map;
> }
> 
>-static $parameters{namespace}ConstructorFunctionMapEntry find$parameters{namespace}ElementConstructorFunction(const AtomicString& localName)
>+static $parameters{namespace}ConstructorFunctionMapEntry find$parameters{namespace}ElementConstructorFunction(const AtomString& localName)
> {
> static const auto map = makeNeverDestroyed(create$parameters{namespace}FactoryMap());
> return map.get().get(localName.impl());
> }
> 
>-RefPtr<$parameters{namespace}Element> $parameters{namespace}ElementFactory::createKnownElement(const AtomicString& localName, Document& document$formElementArgumentForDefinition, bool createdByParser)
>+RefPtr<$parameters{namespace}Element> $parameters{namespace}ElementFactory::createKnownElement(const AtomString& localName, Document& document$formElementArgumentForDefinition, bool createdByParser)
> {
> const $parameters{namespace}ConstructorFunctionMapEntry& entry = find$parameters{namespace}ElementConstructorFunction(localName);
> if (LIKELY(entry.function)) {
>@@ -1051,7 +1051,7 @@ RefPtr<$parameters{namespace}Element> $parameters{namespace}ElementFactory::crea
> return nullptr;
> }
> 
>-Ref<$parameters{namespace}Element> $parameters{namespace}ElementFactory::createElement(const AtomicString& localName, Document& document$formElementArgumentForDefinition, bool createdByParser)
>+Ref<$parameters{namespace}Element> $parameters{namespace}ElementFactory::createElement(const AtomString& localName, Document& document$formElementArgumentForDefinition, bool createdByParser)
> {
> const $parameters{namespace}ConstructorFunctionMapEntry& entry = find$parameters{namespace}ElementConstructorFunction(localName);
> if (LIKELY(entry.function)) {
>@@ -1107,7 +1107,7 @@ public:
> END
> ;
> 
>-print F "static RefPtr<$parameters{namespace}Element> createKnownElement(const AtomicString&, Document&";
>+print F "static RefPtr<$parameters{namespace}Element> createKnownElement(const AtomString&, Document&";
> print F ", HTMLFormElement* = nullptr" if $parameters{namespace} eq "HTML";
> print F ", bool createdByParser = false);\n";
> 
>@@ -1115,7 +1115,7 @@ print F "static RefPtr<$parameters{namespace}Element> createKnownElement(const Q
> print F ", HTMLFormElement* = nullptr" if $parameters{namespace} eq "HTML";
> print F ", bool createdByParser = false);\n";
> 
>-print F "static Ref<$parameters{namespace}Element> createElement(const AtomicString&, Document&";
>+print F "static Ref<$parameters{namespace}Element> createElement(const AtomString&, Document&";
> print F ", HTMLFormElement* = nullptr" if $parameters{namespace} eq "HTML";
> print F ", bool createdByParser = false);\n";
> 
>@@ -1260,7 +1260,7 @@ END
> 
> print F <<END
> 
>-static NEVER_INLINE HashMap<AtomicStringImpl*, Create$parameters{namespace}ElementWrapperFunction> create$parameters{namespace}WrapperMap()
>+static NEVER_INLINE HashMap<AtomStringImpl*, Create$parameters{namespace}ElementWrapperFunction> create$parameters{namespace}WrapperMap()
> {
> struct TableEntry {
> const QualifiedName& name;
>@@ -1298,7 +1298,7 @@ END
> print F <<END
> };
> 
>- HashMap<AtomicStringImpl*, Create$parameters{namespace}ElementWrapperFunction> map;
>+ HashMap<AtomStringImpl*, Create$parameters{namespace}ElementWrapperFunction> map;
> for (auto& entry : table)
> map.add(entry.name.localName().impl(), entry.function);
> return map;
>diff --git a/Source/WebCore/domjit/DOMJITIDLConvert.h b/Source/WebCore/domjit/DOMJITIDLConvert.h
>index 01f9c5c897962bcef518c7c8436b8d48e9a698e4..c9fcf502156a9f98758c45068eb86fe51c81edf5 100644
>--- a/Source/WebCore/domjit/DOMJITIDLConvert.h
>+++ b/Source/WebCore/domjit/DOMJITIDLConvert.h
>@@ -41,18 +41,18 @@ struct DirectConverter<IDLDOMString> {
> };
> 
> template<>
>-struct DirectConverter<IDLAtomicStringAdaptor<IDLDOMString>> {
>+struct DirectConverter<IDLAtomStringAdaptor<IDLDOMString>> {
> static String directConvert(JSC::ExecState& state, JSC::JSString* string)
> {
>- return string->toAtomicString(&state);
>+ return string->toAtomString(&state);
> }
> };
> 
> template<>
>-struct DirectConverter<IDLRequiresExistingAtomicStringAdaptor<IDLDOMString>> {
>+struct DirectConverter<IDLRequiresExistingAtomStringAdaptor<IDLDOMString>> {
> static String directConvert(JSC::ExecState& state, JSC::JSString* string)
> {
>- return string->toExistingAtomicString(&state);
>+ return string->toExistingAtomString(&state);
> }
> };
> 
>diff --git a/Source/WebCore/domjit/DOMJITIDLType.h b/Source/WebCore/domjit/DOMJITIDLType.h
>index e0a5d2868cbaa0909a7c52ae30384e4bf5a84040..9b108ea3e41fcbedd479affe568c9d1e296ccea6 100644
>--- a/Source/WebCore/domjit/DOMJITIDLType.h
>+++ b/Source/WebCore/domjit/DOMJITIDLType.h
>@@ -39,8 +39,8 @@ template<> struct IDLJSArgumentTypeSelect<IDLShort> { typedef int32_t type; };
> template<> struct IDLJSArgumentTypeSelect<IDLUnsignedShort> { typedef int32_t type; };
> template<> struct IDLJSArgumentTypeSelect<IDLLong> { typedef int32_t type; };
> template<> struct IDLJSArgumentTypeSelect<IDLDOMString> { typedef JSC::JSString* type; };
>-template<> struct IDLJSArgumentTypeSelect<IDLAtomicStringAdaptor<IDLDOMString>> { typedef JSC::JSString* type; };
>-template<> struct IDLJSArgumentTypeSelect<IDLRequiresExistingAtomicStringAdaptor<IDLDOMString>> { typedef JSC::JSString* type; };
>+template<> struct IDLJSArgumentTypeSelect<IDLAtomStringAdaptor<IDLDOMString>> { typedef JSC::JSString* type; };
>+template<> struct IDLJSArgumentTypeSelect<IDLRequiresExistingAtomStringAdaptor<IDLDOMString>> { typedef JSC::JSString* type; };
> 
> template<typename IDLType>
> using IDLJSArgumentType = typename IDLJSArgumentTypeSelect<IDLType>::type;
>diff --git a/Source/WebCore/domjit/DOMJITIDLTypeFilter.h b/Source/WebCore/domjit/DOMJITIDLTypeFilter.h
>index fa255ee45f4fc65fa8dce182ad7faf6aff79b4db..c0329d8272b1a35188d58399bc37bac4058dd455 100644
>--- a/Source/WebCore/domjit/DOMJITIDLTypeFilter.h
>+++ b/Source/WebCore/domjit/DOMJITIDLTypeFilter.h
>@@ -40,8 +40,8 @@ template<> struct IDLArgumentTypeFilter<IDLShort> { static const constexpr JSC::
> template<> struct IDLArgumentTypeFilter<IDLUnsignedShort> { static const constexpr JSC::SpeculatedType value = JSC::SpecInt32Only; };
> template<> struct IDLArgumentTypeFilter<IDLLong> { static const constexpr JSC::SpeculatedType value = JSC::SpecInt32Only; };
> template<> struct IDLArgumentTypeFilter<IDLDOMString> { static const constexpr JSC::SpeculatedType value = JSC::SpecString; };
>-template<> struct IDLArgumentTypeFilter<IDLAtomicStringAdaptor<IDLDOMString>> { static const constexpr JSC::SpeculatedType value = JSC::SpecString; };
>-template<> struct IDLArgumentTypeFilter<IDLRequiresExistingAtomicStringAdaptor<IDLDOMString>> { static const constexpr JSC::SpeculatedType value = JSC::SpecString; };
>+template<> struct IDLArgumentTypeFilter<IDLAtomStringAdaptor<IDLDOMString>> { static const constexpr JSC::SpeculatedType value = JSC::SpecString; };
>+template<> struct IDLArgumentTypeFilter<IDLRequiresExistingAtomStringAdaptor<IDLDOMString>> { static const constexpr JSC::SpeculatedType value = JSC::SpecString; };
> 
> template<typename IDLType>
> struct IDLResultTypeFilter {
>@@ -65,8 +65,8 @@ template<> struct IDLResultTypeFilter<IDLUnrestrictedDouble> { static const cons
> template<> struct IDLResultTypeFilter<IDLDOMString> { static const constexpr JSC::SpeculatedType value = JSC::SpecString; };
> template<> struct IDLResultTypeFilter<IDLByteString> { static const constexpr JSC::SpeculatedType value = JSC::SpecString; };
> template<> struct IDLResultTypeFilter<IDLUSVString> { static const constexpr JSC::SpeculatedType value = JSC::SpecString; };
>-template<> struct IDLResultTypeFilter<IDLAtomicStringAdaptor<IDLDOMString>> { static const constexpr JSC::SpeculatedType value = JSC::SpecString; };
>-template<> struct IDLResultTypeFilter<IDLRequiresExistingAtomicStringAdaptor<IDLDOMString>> { static const constexpr JSC::SpeculatedType value = JSC::SpecString; };
>+template<> struct IDLResultTypeFilter<IDLAtomStringAdaptor<IDLDOMString>> { static const constexpr JSC::SpeculatedType value = JSC::SpecString; };
>+template<> struct IDLResultTypeFilter<IDLRequiresExistingAtomStringAdaptor<IDLDOMString>> { static const constexpr JSC::SpeculatedType value = JSC::SpecString; };
> 
> template<typename T>
> struct IDLResultTypeFilter<IDLNullable<T>> {
>diff --git a/Source/WebCore/editing/ApplyBlockElementCommand.cpp b/Source/WebCore/editing/ApplyBlockElementCommand.cpp
>index d72d0cafc294abee443e907377fa62af5e045fc5..dbb5a2a1a1ba1e0e07ed02fe6a23ee790bab6822 100644
>--- a/Source/WebCore/editing/ApplyBlockElementCommand.cpp
>+++ b/Source/WebCore/editing/ApplyBlockElementCommand.cpp
>@@ -39,7 +39,7 @@ namespace WebCore {
> 
> using namespace HTMLNames;
> 
>-ApplyBlockElementCommand::ApplyBlockElementCommand(Document& document, const QualifiedName& tagName, const AtomicString& inlineStyle)
>+ApplyBlockElementCommand::ApplyBlockElementCommand(Document& document, const QualifiedName& tagName, const AtomString& inlineStyle)
> : CompositeEditCommand(document)
> , m_tagName(tagName)
> , m_inlineStyle(inlineStyle)
>diff --git a/Source/WebCore/editing/ApplyBlockElementCommand.h b/Source/WebCore/editing/ApplyBlockElementCommand.h
>index 6cc6df497f6a1a8754ebf6ecd63655eeda292d14..842b3e2d9bfcbc061c6ce6c2725404d8cbef65aa 100644
>--- a/Source/WebCore/editing/ApplyBlockElementCommand.h
>+++ b/Source/WebCore/editing/ApplyBlockElementCommand.h
>@@ -37,7 +37,7 @@ namespace WebCore {
> 
> class ApplyBlockElementCommand : public CompositeEditCommand {
> protected:
>- ApplyBlockElementCommand(Document&, const QualifiedName& tagName, const AtomicString& inlineStyle);
>+ ApplyBlockElementCommand(Document&, const QualifiedName& tagName, const AtomString& inlineStyle);
> ApplyBlockElementCommand(Document&, const QualifiedName& tagName);
> 
> virtual void formatSelection(const VisiblePosition& startOfSelection, const VisiblePosition& endOfSelection);
>@@ -52,7 +52,7 @@ private:
> VisiblePosition endOfNextParagraphSplittingTextNodesIfNeeded(VisiblePosition&, Position&, Position&);
> 
> QualifiedName m_tagName;
>- AtomicString m_inlineStyle;
>+ AtomString m_inlineStyle;
> Position m_endOfLastParagraph;
> };
> 
>diff --git a/Source/WebCore/editing/BreakBlockquoteCommand.cpp b/Source/WebCore/editing/BreakBlockquoteCommand.cpp
>index acbb5d6ab46e0da366e1d0ae65b654c3f8e7bc2e..fdf118c5b34b54d7d568bd875c5ad23df49f71b7 100644
>--- a/Source/WebCore/editing/BreakBlockquoteCommand.cpp
>+++ b/Source/WebCore/editing/BreakBlockquoteCommand.cpp
>@@ -149,7 +149,7 @@ void BreakBlockquoteCommand::doApply()
> while (listChildNode && !listChildNode->hasTagName(liTag))
> listChildNode = listChildNode->nextSibling();
> if (listChildNode && is<RenderListItem>(listChildNode->renderer()))
>- setNodeAttribute(clonedChild, startAttr, AtomicString::number(downcast<RenderListItem>(*listChildNode->renderer()).value()));
>+ setNodeAttribute(clonedChild, startAttr, AtomString::number(downcast<RenderListItem>(*listChildNode->renderer()).value()));
> }
> 
> appendNode(clonedChild.copyRef(), clonedAncestor.releaseNonNull());
>diff --git a/Source/WebCore/editing/CompositeEditCommand.cpp b/Source/WebCore/editing/CompositeEditCommand.cpp
>index 33bd30eac0712cccdde1c992c92e7ad37c428c35..98a496660667b8a5ec33b64dc28f77286dba0338 100644
>--- a/Source/WebCore/editing/CompositeEditCommand.cpp
>+++ b/Source/WebCore/editing/CompositeEditCommand.cpp
>@@ -860,7 +860,7 @@ void CompositeEditCommand::removeNodeAttribute(Element& element, const Qualified
> setNodeAttribute(element, attribute, nullAtom());
> }
> 
>-void CompositeEditCommand::setNodeAttribute(Element& element, const QualifiedName& attribute, const AtomicString& value)
>+void CompositeEditCommand::setNodeAttribute(Element& element, const QualifiedName& attribute, const AtomString& value)
> {
> applyCommandToComposite(SetNodeAttributeCommand::create(element, attribute, value));
> }
>diff --git a/Source/WebCore/editing/CompositeEditCommand.h b/Source/WebCore/editing/CompositeEditCommand.h
>index 12819f20f9028a6d6fb0098aab877e073f5da029..dda490b13cdc2ddb83fb1fc8ffab09df0088d82c 100644
>--- a/Source/WebCore/editing/CompositeEditCommand.h
>+++ b/Source/WebCore/editing/CompositeEditCommand.h
>@@ -176,7 +176,7 @@ protected:
> Position replaceSelectedTextInNode(const String&);
> void replaceTextInNodePreservingMarkers(Text&, unsigned offset, unsigned count, const String& replacementText);
> Position positionOutsideTabSpan(const Position&);
>- void setNodeAttribute(Element&, const QualifiedName& attribute, const AtomicString& value);
>+ void setNodeAttribute(Element&, const QualifiedName& attribute, const AtomString& value);
> void splitElement(Element&, Node& atChild);
> void splitTextNode(Text&, unsigned offset);
> void splitTextNodeContainingElement(Text&, unsigned offset);
>diff --git a/Source/WebCore/editing/Editing.cpp b/Source/WebCore/editing/Editing.cpp
>index 89440fe1abb7f82a8e99b05a89a5b6fc00acfbcb..5f2dcf49c56b54eec405d1b9d3cc974f7087ae52 100644
>--- a/Source/WebCore/editing/Editing.cpp
>+++ b/Source/WebCore/editing/Editing.cpp
>@@ -888,7 +888,7 @@ Ref<HTMLElement> createHTMLElement(Document& document, const QualifiedName& name
> return HTMLElementFactory::createElement(name, document);
> }
> 
>-Ref<HTMLElement> createHTMLElement(Document& document, const AtomicString& tagName)
>+Ref<HTMLElement> createHTMLElement(Document& document, const AtomString& tagName)
> {
> return createHTMLElement(document, QualifiedName(nullAtom(), tagName, xhtmlNamespaceURI));
> }
>diff --git a/Source/WebCore/editing/Editing.h b/Source/WebCore/editing/Editing.h
>index 5fbf1e96f8d51ad48e34d220881a7a3a1125d243..0b582033fa8bf7128e91ef04e7136d03ed46cc7c 100644
>--- a/Source/WebCore/editing/Editing.h
>+++ b/Source/WebCore/editing/Editing.h
>@@ -156,7 +156,7 @@ VisiblePosition visiblePositionForIndexUsingCharacterIterator(Node&, int index);
> 
> WEBCORE_EXPORT Ref<HTMLElement> createDefaultParagraphElement(Document&);
> Ref<HTMLElement> createHTMLElement(Document&, const QualifiedName&);
>-Ref<HTMLElement> createHTMLElement(Document&, const AtomicString&);
>+Ref<HTMLElement> createHTMLElement(Document&, const AtomString&);
> 
> WEBCORE_EXPORT HTMLElement* enclosingList(Node*);
> HTMLElement* outermostEnclosingList(Node*, Node* rootList = nullptr);
>diff --git a/Source/WebCore/editing/EditingStyle.cpp b/Source/WebCore/editing/EditingStyle.cpp
>index 692ee42ee58dfad67829e9da67ba5d9f7bee60de..06c3c8fda5e1e55296147a0b15e64c66e323e10b 100644
>--- a/Source/WebCore/editing/EditingStyle.cpp
>+++ b/Source/WebCore/editing/EditingStyle.cpp
>@@ -296,7 +296,7 @@ void HTMLAttributeEquivalent::addToStyle(Element* element, EditingStyle* style)
> RefPtr<CSSValue> HTMLAttributeEquivalent::attributeValueAsCSSValue(Element* element) const
> {
> ASSERT(element);
>- const AtomicString& value = element->getAttribute(m_attrName);
>+ const AtomString& value = element->getAttribute(m_attrName);
> if (value.isNull())
> return nullptr;
> 
>@@ -321,7 +321,7 @@ HTMLFontSizeEquivalent::HTMLFontSizeEquivalent()
> RefPtr<CSSValue> HTMLFontSizeEquivalent::attributeValueAsCSSValue(Element* element) const
> {
> ASSERT(element);
>- const AtomicString& value = element->getAttribute(m_attrName);
>+ const AtomString& value = element->getAttribute(m_attrName);
> if (value.isNull())
> return nullptr;
> CSSValueID size;
>diff --git a/Source/WebCore/editing/Editor.cpp b/Source/WebCore/editing/Editor.cpp
>index dc50b6c223e803cc5a621dab14d53d7f36021902..059e1cbf91f3fd68f251a75242f0875d434dd793 100644
>--- a/Source/WebCore/editing/Editor.cpp
>+++ b/Source/WebCore/editing/Editor.cpp
>@@ -122,7 +122,7 @@
> 
> namespace WebCore {
> 
>-static bool dispatchBeforeInputEvent(Element& element, const AtomicString& inputType, const String& data = { }, RefPtr<DataTransfer>&& dataTransfer = nullptr, const Vector<RefPtr<StaticRange>>& targetRanges = { }, Event::IsCancelable cancelable = Event::IsCancelable::Yes)
>+static bool dispatchBeforeInputEvent(Element& element, const AtomString& inputType, const String& data = { }, RefPtr<DataTransfer>&& dataTransfer = nullptr, const Vector<RefPtr<StaticRange>>& targetRanges = { }, Event::IsCancelable cancelable = Event::IsCancelable::Yes)
> {
> if (!element.document().settings().inputEventsEnabled())
> return true;
>@@ -132,7 +132,7 @@ static bool dispatchBeforeInputEvent(Element& element, const AtomicString& input
> return !event->defaultPrevented();
> }
> 
>-static void dispatchInputEvent(Element& element, const AtomicString& inputType, const String& data = { }, RefPtr<DataTransfer>&& dataTransfer = nullptr, const Vector<RefPtr<StaticRange>>& targetRanges = { })
>+static void dispatchInputEvent(Element& element, const AtomString& inputType, const String& data = { }, RefPtr<DataTransfer>&& dataTransfer = nullptr, const Vector<RefPtr<StaticRange>>& targetRanges = { })
> {
> if (element.document().settings().inputEventsEnabled()) {
> // FIXME: We should not be dispatching to the scoped queue here. Normally, input events are dispatched in CompositeEditCommand::apply after the end of the scope,
>@@ -353,7 +353,7 @@ enum class ClipboardEventKind {
> BeforePaste,
> };
> 
>-static AtomicString eventNameForClipboardEvent(ClipboardEventKind kind)
>+static AtomString eventNameForClipboardEvent(ClipboardEventKind kind)
> {
> switch (kind) {
> case ClipboardEventKind::Copy:
>@@ -1056,7 +1056,7 @@ static void notifyTextFromControls(Element* startRoot, Element* endRoot)
> endingTextControl->didEditInnerTextValue();
> }
> 
>-static bool dispatchBeforeInputEvents(RefPtr<Element> startRoot, RefPtr<Element> endRoot, const AtomicString& inputTypeName, const String& data = { }, RefPtr<DataTransfer>&& dataTransfer = nullptr, const Vector<RefPtr<StaticRange>>& targetRanges = { }, Event::IsCancelable cancelable = Event::IsCancelable::Yes)
>+static bool dispatchBeforeInputEvents(RefPtr<Element> startRoot, RefPtr<Element> endRoot, const AtomString& inputTypeName, const String& data = { }, RefPtr<DataTransfer>&& dataTransfer = nullptr, const Vector<RefPtr<StaticRange>>& targetRanges = { }, Event::IsCancelable cancelable = Event::IsCancelable::Yes)
> {
> bool continueWithDefaultBehavior = true;
> if (startRoot)
>@@ -1066,7 +1066,7 @@ static bool dispatchBeforeInputEvents(RefPtr<Element> startRoot, RefPtr<Element>
> return continueWithDefaultBehavior;
> }
> 
>-static void dispatchInputEvents(RefPtr<Element> startRoot, RefPtr<Element> endRoot, const AtomicString& inputTypeName, const String& data = { }, RefPtr<DataTransfer>&& dataTransfer = nullptr, const Vector<RefPtr<StaticRange>>& targetRanges = { })
>+static void dispatchInputEvents(RefPtr<Element> startRoot, RefPtr<Element> endRoot, const AtomString& inputTypeName, const String& data = { }, RefPtr<DataTransfer>&& dataTransfer = nullptr, const Vector<RefPtr<StaticRange>>& targetRanges = { })
> {
> if (startRoot)
> dispatchInputEvent(*startRoot, inputTypeName, data, WTFMove(dataTransfer), targetRanges);
>@@ -1463,8 +1463,8 @@ void Editor::pasteAsQuotation()
> void Editor::quoteFragmentForPasting(DocumentFragment& fragment)
> {
> auto blockQuote = HTMLQuoteElement::create(blockquoteTag, document());
>- blockQuote->setAttributeWithoutSynchronization(typeAttr, AtomicString("cite"));
>- blockQuote->setAttributeWithoutSynchronization(classAttr, AtomicString(ApplePasteAsQuotation));
>+ blockQuote->setAttributeWithoutSynchronization(typeAttr, AtomString("cite"));
>+ blockQuote->setAttributeWithoutSynchronization(classAttr, AtomString(ApplePasteAsQuotation));
> 
> auto childNode = fragment.firstChild();
> 
>diff --git a/Source/WebCore/editing/EditorCommand.cpp b/Source/WebCore/editing/EditorCommand.cpp
>index 82163e678202782d2c120cafa3c78b2d5bb08375..4e5aa618688616962017f3cf3ff4d1fb5fbd1c34 100644
>--- a/Source/WebCore/editing/EditorCommand.cpp
>+++ b/Source/WebCore/editing/EditorCommand.cpp
>@@ -63,7 +63,7 @@
> #include "markup.h"
> #include <pal/system/Sound.h>
> #include <pal/text/KillRing.h>
>-#include <wtf/text/AtomicString.h>
>+#include <wtf/text/AtomString.h>
> 
> namespace WebCore {
> 
>diff --git a/Source/WebCore/editing/InsertEditableImageCommand.cpp b/Source/WebCore/editing/InsertEditableImageCommand.cpp
>index d9afa56e6cccaf092bb3da52286fade192b69bf0..22d4d6ff74c205daa5ab9856ff4a622bab802589 100644
>--- a/Source/WebCore/editing/InsertEditableImageCommand.cpp
>+++ b/Source/WebCore/editing/InsertEditableImageCommand.cpp
>@@ -50,9 +50,9 @@ void InsertEditableImageCommand::doApply()
> 
> m_imageElement = HTMLImageElement::create(document());
> m_imageElement->setAttributeWithoutSynchronization(HTMLNames::x_apple_editable_imageAttr, emptyAtom());
>- m_imageElement->setAttributeWithoutSynchronization(HTMLNames::widthAttr, AtomicString("100%", AtomicString::ConstructFromLiteral));
>- m_imageElement->setAttributeWithoutSynchronization(HTMLNames::heightAttr, AtomicString("300px", AtomicString::ConstructFromLiteral));
>- m_imageElement->setAttributeWithoutSynchronization(HTMLNames::styleAttr, AtomicString("display: block", AtomicString::ConstructFromLiteral));
>+ m_imageElement->setAttributeWithoutSynchronization(HTMLNames::widthAttr, AtomString("100%", AtomString::ConstructFromLiteral));
>+ m_imageElement->setAttributeWithoutSynchronization(HTMLNames::heightAttr, AtomString("300px", AtomString::ConstructFromLiteral));
>+ m_imageElement->setAttributeWithoutSynchronization(HTMLNames::styleAttr, AtomString("display: block", AtomString::ConstructFromLiteral));
> 
> insertNodeAt(*m_imageElement, endingSelection().start());
> setEndingSelection(visiblePositionAfterNode(*m_imageElement));
>diff --git a/Source/WebCore/editing/MarkupAccumulator.cpp b/Source/WebCore/editing/MarkupAccumulator.cpp
>index 52500637a9d04be65ff57643a987693185a98664..7e9b47ff6d657f08fd0a9405be88258db3dc473f 100644
>--- a/Source/WebCore/editing/MarkupAccumulator.cpp
>+++ b/Source/WebCore/editing/MarkupAccumulator.cpp
>@@ -94,7 +94,7 @@ static bool elementCannotHaveEndTag(const Node& node)
> // If current node is an area, base, basefont, bgsound, br, col, embed, frame, hr, img,
> // input, keygen, link, meta, param, source, track or wbr element, then continue on to
> // the next child node at this point.
>- static const AtomicStringImpl* const localNames[] = {
>+ static const AtomStringImpl* const localNames[] = {
> areaTag->localName().impl(),
> baseTag->localName().impl(),
> basefontTag->localName().impl(),
>@@ -317,7 +317,7 @@ void MarkupAccumulator::appendQuotedURLAttributeValue(StringBuilder& result, con
> bool MarkupAccumulator::shouldAddNamespaceElement(const Element& element)
> {
> // Don't add namespace attribute if it is already defined for this elem.
>- const AtomicString& prefix = element.prefix();
>+ const AtomString& prefix = element.prefix();
> if (prefix.isEmpty())
> return !element.hasAttribute(xmlnsAtom());
> 
>@@ -346,7 +346,7 @@ bool MarkupAccumulator::shouldAddNamespaceAttribute(const Attribute& attribute,
> return true;
> }
> 
>-void MarkupAccumulator::appendNamespace(StringBuilder& result, const AtomicString& prefix, const AtomicString& namespaceURI, Namespaces& namespaces, bool allowEmptyDefaultNS)
>+void MarkupAccumulator::appendNamespace(StringBuilder& result, const AtomString& prefix, const AtomString& namespaceURI, Namespaces& namespaces, bool allowEmptyDefaultNS)
> {
> namespaces.checkConsistency();
> if (namespaceURI.isEmpty()) {
>@@ -360,8 +360,8 @@ void MarkupAccumulator::appendNamespace(StringBuilder& result, const AtomicStrin
> }
> 
> // Use emptyAtom()s's impl() for both null and empty strings since the HashMap can't handle 0 as a key
>- AtomicStringImpl* pre = prefix.isEmpty() ? emptyAtom().impl() : prefix.impl();
>- AtomicStringImpl* foundNS = namespaces.get(pre);
>+ AtomStringImpl* pre = prefix.isEmpty() ? emptyAtom().impl() : prefix.impl();
>+ AtomStringImpl* foundNS = namespaces.get(pre);
> if (foundNS != namespaceURI.impl()) {
> namespaces.set(pre, namespaceURI.impl());
> // Add namespace to prefix pair so we can do constraint checking later.
>@@ -531,7 +531,7 @@ void MarkupAccumulator::generateUniquePrefix(QualifiedName& prefixedName, const
> builder.clear();
> builder.appendLiteral("NS");
> builder.appendNumber(++m_prefixLevel);
>- const AtomicString& name = builder.toAtomicString();
>+ const AtomString& name = builder.toAtomString();
> if (!namespaces.get(name.impl())) {
> prefixedName.setPrefix(name);
> return;
>@@ -554,11 +554,11 @@ void MarkupAccumulator::appendAttribute(StringBuilder& result, const Element& el
> // Always use xml as prefix if the namespace is the XML namespace.
> prefixedName.setPrefix(xmlAtom());
> } else {
>- AtomicStringImpl* foundNS = namespaces && attribute.prefix().impl() ? namespaces->get(attribute.prefix().impl()) : 0;
>+ AtomStringImpl* foundNS = namespaces && attribute.prefix().impl() ? namespaces->get(attribute.prefix().impl()) : 0;
> bool prefixIsAlreadyMappedToOtherNS = foundNS && foundNS != attribute.namespaceURI().impl();
> if (attribute.prefix().isEmpty() || !foundNS || prefixIsAlreadyMappedToOtherNS) {
>- if (AtomicStringImpl* prefix = namespaces ? namespaces->get(attribute.namespaceURI().impl()) : 0)
>- prefixedName.setPrefix(AtomicString(prefix));
>+ if (AtomStringImpl* prefix = namespaces ? namespaces->get(attribute.namespaceURI().impl()) : 0)
>+ prefixedName.setPrefix(AtomString(prefix));
> else {
> bool shouldBeDeclaredUsingAppendNamespace = !attribute.prefix().isEmpty() && !foundNS;
> if (!shouldBeDeclaredUsingAppendNamespace && attribute.localName() != xmlnsAtom() && namespaces)
>diff --git a/Source/WebCore/editing/MarkupAccumulator.h b/Source/WebCore/editing/MarkupAccumulator.h
>index aaacb2761fb620bf52a78448dd20b461ff566886..7c7bbf31fdbec3c92d642c957d5c882f5c15262d 100644
>--- a/Source/WebCore/editing/MarkupAccumulator.h
>+++ b/Source/WebCore/editing/MarkupAccumulator.h
>@@ -38,7 +38,7 @@ class Element;
> class Node;
> class Range;
> 
>-typedef HashMap<AtomicString, AtomicStringImpl*> Namespaces;
>+typedef HashMap<AtomString, AtomStringImpl*> Namespaces;
> 
> enum EntityMask {
> EntityAmp = 0x0001,
>@@ -94,7 +94,7 @@ protected:
> void appendEndMarkup(StringBuilder&, const Element&);
> 
> void appendAttributeValue(StringBuilder&, const String&, bool isSerializingHTML);
>- void appendNamespace(StringBuilder&, const AtomicString& prefix, const AtomicString& namespaceURI, Namespaces&, bool allowEmptyDefaultNS = false);
>+ void appendNamespace(StringBuilder&, const AtomString& prefix, const AtomString& namespaceURI, Namespaces&, bool allowEmptyDefaultNS = false);
> void appendXMLDeclaration(StringBuilder&, const Document&);
> void appendDocumentType(StringBuilder&, const DocumentType&);
> void appendProcessingInstruction(StringBuilder&, const String& target, const String& data);
>diff --git a/Source/WebCore/editing/ReplaceSelectionCommand.cpp b/Source/WebCore/editing/ReplaceSelectionCommand.cpp
>index ca96dbf0bb0562c23c29edcb99ba5c6b4b48ed54..9572b10de45fecfdbcb2dbd776dd70aa2fc91681 100644
>--- a/Source/WebCore/editing/ReplaceSelectionCommand.cpp
>+++ b/Source/WebCore/editing/ReplaceSelectionCommand.cpp
>@@ -572,7 +572,7 @@ void ReplaceSelectionCommand::removeRedundantStylesAndKeepStyleSpanInline(Insert
> }
> }
> 
>-static bool isProhibitedParagraphChild(const AtomicString& name)
>+static bool isProhibitedParagraphChild(const AtomString& name)
> {
> // https://dvcs.w3.org/hg/editing/raw-file/57abe6d3cb60/editing.html#prohibited-paragraph-child
> static const auto localNames = makeNeverDestroyed([] {
>@@ -626,7 +626,7 @@ static bool isProhibitedParagraphChild(const AtomicString& name)
> &ulTag.get(),
> &xmpTag.get(),
> };
>- HashSet<AtomicString> set;
>+ HashSet<AtomString> set;
> for (auto& tag : tags)
> set.add(tag->localName());
> return set;
>@@ -903,7 +903,7 @@ static bool isInlineNodeWithStyle(const Node* node)
> // We can skip over elements whose class attribute is
> // one of our internal classes.
> const HTMLElement* element = static_cast<const HTMLElement*>(node);
>- const AtomicString& classAttributeValue = element->attributeWithoutSynchronization(classAttr);
>+ const AtomString& classAttributeValue = element->attributeWithoutSynchronization(classAttr);
> if (classAttributeValue == AppleTabSpanClass
> || classAttributeValue == AppleConvertedSpace
> || classAttributeValue == ApplePasteAsQuotation)
>diff --git a/Source/WebCore/editing/SetNodeAttributeCommand.cpp b/Source/WebCore/editing/SetNodeAttributeCommand.cpp
>index f838e546c19825ba84d6f61402253f43284664d7..80c146a1840e8e4f894c86fbfb64a65f21b9b80e 100644
>--- a/Source/WebCore/editing/SetNodeAttributeCommand.cpp
>+++ b/Source/WebCore/editing/SetNodeAttributeCommand.cpp
>@@ -31,7 +31,7 @@
> 
> namespace WebCore {
> 
>-SetNodeAttributeCommand::SetNodeAttributeCommand(Ref<Element>&& element, const QualifiedName& attribute, const AtomicString& value)
>+SetNodeAttributeCommand::SetNodeAttributeCommand(Ref<Element>&& element, const QualifiedName& attribute, const AtomString& value)
> : SimpleEditCommand(element->document())
> , m_element(WTFMove(element))
> , m_attribute(attribute)
>@@ -48,7 +48,7 @@ void SetNodeAttributeCommand::doApply()
> void SetNodeAttributeCommand::doUnapply()
> {
> m_element->setAttribute(m_attribute, m_oldValue);
>- AtomicStringImpl* nullString = nullptr;
>+ AtomStringImpl* nullString = nullptr;
> m_oldValue = nullString;
> }
> 
>diff --git a/Source/WebCore/editing/SetNodeAttributeCommand.h b/Source/WebCore/editing/SetNodeAttributeCommand.h
>index 88449dee6b76a3c56be3353a0ad4cf266a610d15..de512c50e7270e049c48aecd1cf77d9a5b873ed0 100644
>--- a/Source/WebCore/editing/SetNodeAttributeCommand.h
>+++ b/Source/WebCore/editing/SetNodeAttributeCommand.h
>@@ -32,13 +32,13 @@ namespace WebCore {
> 
> class SetNodeAttributeCommand : public SimpleEditCommand {
> public:
>- static Ref<SetNodeAttributeCommand> create(Ref<Element>&& element, const QualifiedName& attribute, const AtomicString& value)
>+ static Ref<SetNodeAttributeCommand> create(Ref<Element>&& element, const QualifiedName& attribute, const AtomString& value)
> {
> return adoptRef(*new SetNodeAttributeCommand(WTFMove(element), attribute, value));
> }
> 
> private:
>- SetNodeAttributeCommand(Ref<Element>&&, const QualifiedName& attribute, const AtomicString& value);
>+ SetNodeAttributeCommand(Ref<Element>&&, const QualifiedName& attribute, const AtomString& value);
> 
> void doApply() override;
> void doUnapply() override;
>@@ -49,8 +49,8 @@ private:
> 
> Ref<Element> m_element;
> QualifiedName m_attribute;
>- AtomicString m_value;
>- AtomicString m_oldValue;
>+ AtomString m_value;
>+ AtomString m_oldValue;
> };
> 
> } // namespace WebCore
>diff --git a/Source/WebCore/editing/SplitElementCommand.cpp b/Source/WebCore/editing/SplitElementCommand.cpp
>index ba32ab5ce6b4be69e632b389763f85d7959c5fac..d21bcf09deee65a1683531f348af4dd3f9d96a84 100644
>--- a/Source/WebCore/editing/SplitElementCommand.cpp
>+++ b/Source/WebCore/editing/SplitElementCommand.cpp
>@@ -84,7 +84,7 @@ void SplitElementCommand::doUnapply()
> m_element2->insertBefore(child, refChild.get());
> 
> // Recover the id attribute of the original element.
>- const AtomicString& id = m_element1->getIdAttribute();
>+ const AtomString& id = m_element1->getIdAttribute();
> if (!id.isNull())
> m_element2->setIdAttribute(id);
> 
>diff --git a/Source/WebCore/editing/cocoa/DataDetection.mm b/Source/WebCore/editing/cocoa/DataDetection.mm
>index bcb238e106d777883ede0f343ad46cf4c295a8dd..681f5f5653af21b26dcf958df3199ed810ee0ada 100644
>--- a/Source/WebCore/editing/cocoa/DataDetection.mm
>+++ b/Source/WebCore/editing/cocoa/DataDetection.mm
>@@ -196,7 +196,7 @@ bool DataDetection::shouldCancelDefaultAction(Element& element)
> if (softLink_DataDetectorsCore_DDShouldImmediatelyShowActionSheetForURL(downcast<HTMLAnchorElement>(element).href()))
> return true;
> 
>- const AtomicString& resultAttribute = element.attributeWithoutSynchronization(x_apple_data_detectors_resultAttr);
>+ const AtomString& resultAttribute = element.attributeWithoutSynchronization(x_apple_data_detectors_resultAttr);
> if (resultAttribute.isEmpty())
> return false;
> NSArray *results = element.document().frame()->dataDetectionResults();
>@@ -636,7 +636,7 @@ NSArray *DataDetection::detectContentInRange(RefPtr<Range>& contextRange, DataDe
> anchorElement->appendChild(WTFMove(newTextNode));
> 
> // Add a special attribute to mark this URLification as the result of data detectors.
>- anchorElement->setAttributeWithoutSynchronization(x_apple_data_detectorsAttr, AtomicString("true", AtomicString::ConstructFromLiteral));
>+ anchorElement->setAttributeWithoutSynchronization(x_apple_data_detectorsAttr, AtomString("true", AtomString::ConstructFromLiteral));
> anchorElement->setAttributeWithoutSynchronization(x_apple_data_detectors_typeAttr, dataDetectorTypeForCategory(softLink_DataDetectorsCore_DDResultGetCategory(coreResult)));
> anchorElement->setAttributeWithoutSynchronization(x_apple_data_detectors_resultAttr, identifier);
> 
>diff --git a/Source/WebCore/editing/cocoa/WebContentReaderCocoa.mm b/Source/WebCore/editing/cocoa/WebContentReaderCocoa.mm
>index bf29a86c491ef39ac45fc28d892fb7fe483df499..2612e73f351a9982f7f77c1d7a57dc469ca0e9b6 100644
>--- a/Source/WebCore/editing/cocoa/WebContentReaderCocoa.mm
>+++ b/Source/WebCore/editing/cocoa/WebContentReaderCocoa.mm
>@@ -262,9 +262,9 @@ static Ref<DocumentFragment> createFragmentForImageAttachment(Frame& frame, Docu
> image->setAttributeWithoutSynchronization(HTMLNames::srcAttr, DOMURL::createObjectURL(document, Blob::create(buffer.get(), contentType)));
> image->setAttachmentElement(WTFMove(attachment));
> if (preferredSize.width)
>- image->setAttributeWithoutSynchronization(HTMLNames::widthAttr, AtomicString::number(*preferredSize.width));
>+ image->setAttributeWithoutSynchronization(HTMLNames::widthAttr, AtomString::number(*preferredSize.width));
> if (preferredSize.height)
>- image->setAttributeWithoutSynchronization(HTMLNames::heightAttr, AtomicString::number(*preferredSize.height));
>+ image->setAttributeWithoutSynchronization(HTMLNames::heightAttr, AtomString::number(*preferredSize.height));
> fragment->appendChild(WTFMove(image));
> } else {
> attachment->updateAttributes(buffer->size(), contentType, defaultImageAttachmentName);
>@@ -296,7 +296,7 @@ static void replaceRichContentWithAttachments(Frame& frame, DocumentFragment& fr
> return;
> 
> // FIXME: Handle resources in subframe archives.
>- HashMap<AtomicString, Ref<ArchiveResource>> urlToResourceMap;
>+ HashMap<AtomString, Ref<ArchiveResource>> urlToResourceMap;
> for (auto& subresource : subresources) {
> auto& url = subresource->url();
> if (shouldReplaceSubresourceURL(url))
>@@ -332,7 +332,7 @@ static void replaceRichContentWithAttachments(Frame& frame, DocumentFragment& fr
> if (name.isEmpty())
> name = URL({ }, resourceURLString).lastPathComponent();
> if (name.isEmpty())
>- name = AtomicString("media");
>+ name = AtomString("media");
> 
> attachmentInsertionInfo.append({ name, resource->value->mimeType(), resource->value->data(), image });
> }
>@@ -350,7 +350,7 @@ static void replaceRichContentWithAttachments(Frame& frame, DocumentFragment& fr
> 
> auto name = URL({ }, resourceURLString).lastPathComponent();
> if (name.isEmpty())
>- name = AtomicString("file");
>+ name = AtomString("file");
> 
> attachmentInsertionInfo.append({ name, resource->value->mimeType(), resource->value->data(), object });
> }
>@@ -413,7 +413,7 @@ RefPtr<DocumentFragment> createFragmentAndAddResources(Frame& frame, NSAttribute
> return WTFMove(fragmentAndResources.fragment);
> }
> 
>- HashMap<AtomicString, AtomicString> blobURLMap;
>+ HashMap<AtomString, AtomString> blobURLMap;
> for (const Ref<ArchiveResource>& subresource : fragmentAndResources.resources) {
> auto blob = Blob::create(subresource->data(), subresource->mimeType());
> String blobURL = DOMURL::createObjectURL(document, blob);
>@@ -459,7 +459,7 @@ static String sanitizeMarkupWithArchive(Frame& frame, Document& destinationDocum
> return sanitizedMarkupForFragmentInDocument(WTFMove(fragment), *stagingDocument, msoListQuirks, markupAndArchive.markup);
> }
> 
>- HashMap<AtomicString, AtomicString> blobURLMap;
>+ HashMap<AtomString, AtomString> blobURLMap;
> for (const Ref<ArchiveResource>& subresource : markupAndArchive.archive->subresources()) {
> auto& subresourceURL = subresource->url();
> if (!shouldReplaceSubresourceURL(subresourceURL))
>@@ -739,9 +739,9 @@ static Ref<HTMLElement> attachmentForFilePath(Frame& frame, const String& path,
> image->setAttributeWithoutSynchronization(HTMLNames::srcAttr, DOMURL::createObjectURL(document, File::create(path)));
> image->setAttachmentElement(WTFMove(attachment));
> if (preferredSize.width)
>- image->setAttributeWithoutSynchronization(HTMLNames::widthAttr, AtomicString::number(*preferredSize.width));
>+ image->setAttributeWithoutSynchronization(HTMLNames::widthAttr, AtomString::number(*preferredSize.width));
> if (preferredSize.height)
>- image->setAttributeWithoutSynchronization(HTMLNames::heightAttr, AtomicString::number(*preferredSize.height));
>+ image->setAttributeWithoutSynchronization(HTMLNames::heightAttr, AtomString::number(*preferredSize.height));
> return image;
> }
> 
>@@ -776,9 +776,9 @@ static Ref<HTMLElement> attachmentForData(Frame& frame, SharedBuffer& buffer, co
> image->setAttributeWithoutSynchronization(HTMLNames::srcAttr, DOMURL::createObjectURL(document, File::create(Blob::create(buffer, WTFMove(attachmentType)), WTFMove(fileName))));
> image->setAttachmentElement(WTFMove(attachment));
> if (preferredSize.width)
>- image->setAttributeWithoutSynchronization(HTMLNames::widthAttr, AtomicString::number(*preferredSize.width));
>+ image->setAttributeWithoutSynchronization(HTMLNames::widthAttr, AtomString::number(*preferredSize.width));
> if (preferredSize.height)
>- image->setAttributeWithoutSynchronization(HTMLNames::heightAttr, AtomicString::number(*preferredSize.height));
>+ image->setAttributeWithoutSynchronization(HTMLNames::heightAttr, AtomString::number(*preferredSize.height));
> return image;
> }
> 
>diff --git a/Source/WebCore/editing/gtk/EditorGtk.cpp b/Source/WebCore/editing/gtk/EditorGtk.cpp
>index 8c4ea290fc5b8c3d4c3d09ce305412d826a5dca7..706e82673f081333735e5871278c8d450d0b69bc 100644
>--- a/Source/WebCore/editing/gtk/EditorGtk.cpp
>+++ b/Source/WebCore/editing/gtk/EditorGtk.cpp
>@@ -103,7 +103,7 @@ void Editor::pasteWithPasteboard(Pasteboard* pasteboard, OptionSet<PasteOption>
> pasteAsFragment(fragment.releaseNonNull(), canSmartReplaceWithPasteboard(*pasteboard), chosePlainText, options.contains(PasteOption::IgnoreMailBlockquote) ? MailBlockquoteHandling::IgnoreBlockquote : MailBlockquoteHandling::RespectBlockquote);
> }
> 
>-static const AtomicString& elementURL(Element& element)
>+static const AtomString& elementURL(Element& element)
> {
> if (is<HTMLImageElement>(element) || is<HTMLInputElement>(element))
> return element.attributeWithoutSynchronization(HTMLNames::srcAttr);
>diff --git a/Source/WebCore/editing/markup.cpp b/Source/WebCore/editing/markup.cpp
>index cac009732125cc899590e4b44a645ec4eff17905..d4ea36dd01fd3c2da57b8948a67b426fde3b0303 100644
>--- a/Source/WebCore/editing/markup.cpp
>+++ b/Source/WebCore/editing/markup.cpp
>@@ -130,7 +130,7 @@ static void completeURLs(DocumentFragment* fragment, const String& baseURL)
> change.apply();
> }
> 
>-void replaceSubresourceURLs(Ref<DocumentFragment>&& fragment, HashMap<AtomicString, AtomicString>&& replacementMap)
>+void replaceSubresourceURLs(Ref<DocumentFragment>&& fragment, HashMap<AtomString, AtomString>&& replacementMap)
> {
> Vector<AttributeChange> changes;
> for (auto& element : descendantsOfType<Element>(fragment)) {
>@@ -1241,9 +1241,9 @@ Ref<DocumentFragment> createFragmentForImageAndURL(Document& document, const Str
> auto imageElement = HTMLImageElement::create(document);
> imageElement->setAttributeWithoutSynchronization(HTMLNames::srcAttr, url);
> if (preferredSize.width)
>- imageElement->setAttributeWithoutSynchronization(HTMLNames::widthAttr, AtomicString::number(*preferredSize.width));
>+ imageElement->setAttributeWithoutSynchronization(HTMLNames::widthAttr, AtomString::number(*preferredSize.width));
> if (preferredSize.height)
>- imageElement->setAttributeWithoutSynchronization(HTMLNames::heightAttr, AtomicString::number(*preferredSize.height));
>+ imageElement->setAttributeWithoutSynchronization(HTMLNames::heightAttr, AtomString::number(*preferredSize.height));
> auto fragment = document.createDocumentFragment();
> fragment->appendChild(imageElement);
> 
>diff --git a/Source/WebCore/editing/markup.h b/Source/WebCore/editing/markup.h
>index a5eb8244fe49d414c4385df52703e857827ff45f..100fbf35b4cf2141d8444c74939eadde96e5b581 100644
>--- a/Source/WebCore/editing/markup.h
>+++ b/Source/WebCore/editing/markup.h
>@@ -49,7 +49,7 @@ class QualifiedName;
> class Range;
> class VisibleSelection;
> 
>-void replaceSubresourceURLs(Ref<DocumentFragment>&&, HashMap<AtomicString, AtomicString>&&);
>+void replaceSubresourceURLs(Ref<DocumentFragment>&&, HashMap<AtomString, AtomString>&&);
> void removeSubresourceURLAttributes(Ref<DocumentFragment>&&, WTF::Function<bool(const URL&)> shouldRemoveURL);
> 
> enum class MSOListQuirks { CheckIfNeeded, Disabled };
>diff --git a/Source/WebCore/fileapi/FileReader.cpp b/Source/WebCore/fileapi/FileReader.cpp
>index 88852475e998a3f10d13e93ffba175256864a60b..9ad3da9efff0f3a707a0601f78601d5d868258f5 100644
>--- a/Source/WebCore/fileapi/FileReader.cpp
>+++ b/Source/WebCore/fileapi/FileReader.cpp
>@@ -222,7 +222,7 @@ void FileReader::didFail(int errorCode)
> m_loadingActivity = nullptr;
> }
> 
>-void FileReader::fireEvent(const AtomicString& type)
>+void FileReader::fireEvent(const AtomString& type)
> {
> dispatchEvent(ProgressEvent::create(type, true, m_loader ? m_loader->bytesLoaded() : 0, m_loader ? m_loader->totalBytes() : 0));
> }
>diff --git a/Source/WebCore/fileapi/FileReader.h b/Source/WebCore/fileapi/FileReader.h
>index 90f1ead0062762103c0d6df422e65414d8825556..effdb290f3f043ee7f6888be84fc6212988b367e 100644
>--- a/Source/WebCore/fileapi/FileReader.h
>+++ b/Source/WebCore/fileapi/FileReader.h
>@@ -93,7 +93,7 @@ private:
> 
> ExceptionOr<void> readInternal(Blob&, FileReaderLoader::ReadType);
> void fireErrorEvent(int httpStatusCode);
>- void fireEvent(const AtomicString& type);
>+ void fireEvent(const AtomString& type);
> 
> ReadyState m_state { EMPTY };
> bool m_aborting { false };
>diff --git a/Source/WebCore/html/Autocapitalize.cpp b/Source/WebCore/html/Autocapitalize.cpp
>index 2f87a352208c48cfadeac3b1ab7754ed90d3b832..218f3db2f6111d496fefa1dd7898c86cdd8511e5 100644
>--- a/Source/WebCore/html/Autocapitalize.cpp
>+++ b/Source/WebCore/html/Autocapitalize.cpp
>@@ -30,7 +30,7 @@
> 
> namespace WebCore {
> 
>-AutocapitalizeType autocapitalizeTypeForAttributeValue(const AtomicString& attributeValue)
>+AutocapitalizeType autocapitalizeTypeForAttributeValue(const AtomString& attributeValue)
> {
> // Omitted / missing values are the Default state.
> if (attributeValue.isEmpty())
>@@ -49,25 +49,25 @@ AutocapitalizeType autocapitalizeTypeForAttributeValue(const AtomicString& attri
> return AutocapitalizeTypeSentences;
> }
> 
>-const AtomicString& stringForAutocapitalizeType(AutocapitalizeType type)
>+const AtomString& stringForAutocapitalizeType(AutocapitalizeType type)
> {
> switch (type) {
> case AutocapitalizeTypeDefault:
> return nullAtom();
> case AutocapitalizeTypeNone: {
>- static NeverDestroyed<const AtomicString> valueNone("none", AtomicString::ConstructFromLiteral);
>+ static NeverDestroyed<const AtomString> valueNone("none", AtomString::ConstructFromLiteral);
> return valueNone;
> }
> case AutocapitalizeTypeSentences: {
>- static NeverDestroyed<const AtomicString> valueSentences("sentences", AtomicString::ConstructFromLiteral);
>+ static NeverDestroyed<const AtomString> valueSentences("sentences", AtomString::ConstructFromLiteral);
> return valueSentences;
> }
> case AutocapitalizeTypeWords: {
>- static NeverDestroyed<const AtomicString> valueWords("words", AtomicString::ConstructFromLiteral);
>+ static NeverDestroyed<const AtomString> valueWords("words", AtomString::ConstructFromLiteral);
> return valueWords;
> }
> case AutocapitalizeTypeAllCharacters: {
>- static NeverDestroyed<const AtomicString> valueAllCharacters("characters", AtomicString::ConstructFromLiteral);
>+ static NeverDestroyed<const AtomString> valueAllCharacters("characters", AtomString::ConstructFromLiteral);
> return valueAllCharacters;
> }
> }
>diff --git a/Source/WebCore/html/Autocapitalize.h b/Source/WebCore/html/Autocapitalize.h
>index 1c32579e6bef0b9d37c6468b84a88dd2a20bc190..9151bc1a2f07b5571b423c7239e8721beac53c5a 100644
>--- a/Source/WebCore/html/Autocapitalize.h
>+++ b/Source/WebCore/html/Autocapitalize.h
>@@ -26,11 +26,11 @@
> #pragma once
> 
> #include "AutocapitalizeTypes.h"
>-#include <wtf/text/AtomicString.h>
>+#include <wtf/text/AtomString.h>
> 
> namespace WebCore {
> 
>-AutocapitalizeType autocapitalizeTypeForAttributeValue(const AtomicString&);
>-const AtomicString& stringForAutocapitalizeType(AutocapitalizeType);
>+AutocapitalizeType autocapitalizeTypeForAttributeValue(const AtomString&);
>+const AtomString& stringForAutocapitalizeType(AutocapitalizeType);
> 
> } // namespace WebCore
>diff --git a/Source/WebCore/html/Autofill.cpp b/Source/WebCore/html/Autofill.cpp
>index 2f1de9bcecef520ca11e80d3638f7001c7b863a3..50da8128ebdd375a367fa5f1e7f9e59214a0364b 100644
>--- a/Source/WebCore/html/Autofill.cpp
>+++ b/Source/WebCore/html/Autofill.cpp
>@@ -31,8 +31,8 @@
> #include "HTMLNames.h"
> #include <wtf/HashMap.h>
> #include <wtf/NeverDestroyed.h>
>-#include <wtf/text/AtomicString.h>
>-#include <wtf/text/AtomicStringHash.h>
>+#include <wtf/text/AtomString.h>
>+#include <wtf/text/AtomStringHash.h>
> 
> namespace WebCore {
> 
>@@ -48,7 +48,7 @@ struct AutofillInfo {
> AutofillCategory category;
> };
> 
>-static const HashMap<AtomicString, AutofillInfo>& fieldNameMap()
>+static const HashMap<AtomString, AutofillInfo>& fieldNameMap()
> {
> static const auto map = makeNeverDestroyed([] {
> struct MapEntry {
>@@ -113,7 +113,7 @@ static const HashMap<AtomicString, AutofillInfo>& fieldNameMap()
> { "email", { AutofillFieldName::Email, AutofillCategory::Contact } },
> { "impp", { AutofillFieldName::Impp, AutofillCategory::Contact } },
> };
>- HashMap<AtomicString, AutofillInfo> map;
>+ HashMap<AtomString, AutofillInfo> map;
> for (auto& entry : entries)
> map.add(entry.name, entry.value);
> return map;
>@@ -121,7 +121,7 @@ static const HashMap<AtomicString, AutofillInfo>& fieldNameMap()
> return map;
> }
> 
>-AutofillFieldName toAutofillFieldName(const AtomicString& value)
>+AutofillFieldName toAutofillFieldName(const AtomString& value)
> {
> auto map = fieldNameMap();
> auto it = map.find(value);
>@@ -130,13 +130,13 @@ AutofillFieldName toAutofillFieldName(const AtomicString& value)
> return it->value.fieldName;
> }
> 
>-static inline bool isContactToken(const AtomicString& token)
>+static inline bool isContactToken(const AtomString& token)
> {
>- static NeverDestroyed<AtomicString> home("home", AtomicString::ConstructFromLiteral);
>- static NeverDestroyed<AtomicString> work("work", AtomicString::ConstructFromLiteral);
>- static NeverDestroyed<AtomicString> mobile("mobile", AtomicString::ConstructFromLiteral);
>- static NeverDestroyed<AtomicString> fax("fax", AtomicString::ConstructFromLiteral);
>- static NeverDestroyed<AtomicString> pager("pager", AtomicString::ConstructFromLiteral);
>+ static NeverDestroyed<AtomString> home("home", AtomString::ConstructFromLiteral);
>+ static NeverDestroyed<AtomString> work("work", AtomString::ConstructFromLiteral);
>+ static NeverDestroyed<AtomString> mobile("mobile", AtomString::ConstructFromLiteral);
>+ static NeverDestroyed<AtomString> fax("fax", AtomString::ConstructFromLiteral);
>+ static NeverDestroyed<AtomString> pager("pager", AtomString::ConstructFromLiteral);
> 
> return token == home || token == work || token == mobile || token == fax || token == pager;
> }
>@@ -161,8 +161,8 @@ static unsigned maxTokensForAutofillFieldCategory(AutofillCategory category)
> // https://html.spec.whatwg.org/multipage/forms.html#processing-model-3
> AutofillData AutofillData::createFromHTMLFormControlElement(const HTMLFormControlElement& element)
> {
>- static NeverDestroyed<AtomicString> on("on", AtomicString::ConstructFromLiteral);
>- static NeverDestroyed<AtomicString> off("off", AtomicString::ConstructFromLiteral);
>+ static NeverDestroyed<AtomString> on("on", AtomString::ConstructFromLiteral);
>+ static NeverDestroyed<AtomString> off("off", AtomString::ConstructFromLiteral);
> 
> // Label: Default
> // 26. Let the element's IDL-exposed autofill value be the empty string, and its autofill hint set and autofill scope be empty.
>@@ -180,7 +180,7 @@ AutofillData AutofillData::createFromHTMLFormControlElement(const HTMLFormContro
> };
> 
> 
>- const AtomicString& attributeValue = element.attributeWithoutSynchronization(HTMLNames::autocompleteAttr);
>+ const AtomString& attributeValue = element.attributeWithoutSynchronization(HTMLNames::autocompleteAttr);
> 
> // 1. If the element has no autocomplete attribute, then jump to the step labeled default.
> if (attributeValue.isNull())
>diff --git a/Source/WebCore/html/Autofill.h b/Source/WebCore/html/Autofill.h
>index 3a539bac79dc66f7982abaf1315fc148e0184e15..a4abaf931237cf6bdb1903833bba1e58bd338548 100644
>--- a/Source/WebCore/html/Autofill.h
>+++ b/Source/WebCore/html/Autofill.h
>@@ -25,7 +25,7 @@
> 
> #pragma once
> 
>-#include <wtf/text/AtomicString.h>
>+#include <wtf/text/AtomString.h>
> #include <wtf/text/WTFString.h>
> 
> namespace WebCore {
>@@ -92,7 +92,7 @@ enum class AutofillFieldName {
> Impp
> };
> 
>-WEBCORE_EXPORT AutofillFieldName toAutofillFieldName(const AtomicString&);
>+WEBCORE_EXPORT AutofillFieldName toAutofillFieldName(const AtomString&);
> 
> class HTMLFormControlElement;
> 
>@@ -100,7 +100,7 @@ class AutofillData {
> public:
> static AutofillData createFromHTMLFormControlElement(const HTMLFormControlElement&);
> 
>- AutofillData(const AtomicString& fieldName, const String& idlExposedValue)
>+ AutofillData(const AtomString& fieldName, const String& idlExposedValue)
> : fieldName(fieldName)
> , idlExposedValue(idlExposedValue)
> {
>@@ -108,7 +108,7 @@ public:
> 
> // We could add support for hint tokens and scope tokens if those ever became useful to anyone.
> 
>- AtomicString fieldName;
>+ AtomString fieldName;
> String idlExposedValue;
> };
> 
>diff --git a/Source/WebCore/html/BaseCheckableInputType.cpp b/Source/WebCore/html/BaseCheckableInputType.cpp
>index 4fdae444d8c5db5fe5fd73a818f3780b48dc5c24..eb9744be25fe0a9d7b170d20ed9b2865f811d51b 100644
>--- a/Source/WebCore/html/BaseCheckableInputType.cpp
>+++ b/Source/WebCore/html/BaseCheckableInputType.cpp
>@@ -101,7 +101,7 @@ void BaseCheckableInputType::accessKeyAction(bool sendMouseEvents)
> 
> String BaseCheckableInputType::fallbackValue() const
> {
>- static NeverDestroyed<const AtomicString> on("on", AtomicString::ConstructFromLiteral);
>+ static NeverDestroyed<const AtomString> on("on", AtomString::ConstructFromLiteral);
> return on.get();
> }
> 
>diff --git a/Source/WebCore/html/BaseChooserOnlyDateAndTimeInputType.cpp b/Source/WebCore/html/BaseChooserOnlyDateAndTimeInputType.cpp
>index 7828ea1a936b83ce40d32f5efae2269570aebb70..ab41976d32f5bdfbbf5b70f08b9cb69bd0427485 100644
>--- a/Source/WebCore/html/BaseChooserOnlyDateAndTimeInputType.cpp
>+++ b/Source/WebCore/html/BaseChooserOnlyDateAndTimeInputType.cpp
>@@ -61,7 +61,7 @@ void BaseChooserOnlyDateAndTimeInputType::handleDOMActivateEvent(Event&)
> 
> void BaseChooserOnlyDateAndTimeInputType::createShadowSubtree()
> {
>- static NeverDestroyed<AtomicString> valueContainerPseudo("-webkit-date-and-time-value", AtomicString::ConstructFromLiteral);
>+ static NeverDestroyed<AtomString> valueContainerPseudo("-webkit-date-and-time-value", AtomString::ConstructFromLiteral);
> 
> ASSERT(element());
> auto valueContainer = HTMLDivElement::create(element()->document());
>diff --git a/Source/WebCore/html/BaseTextInputType.cpp b/Source/WebCore/html/BaseTextInputType.cpp
>index b3685b91a9973b8311b1ca9cc80035f5fcfe51e8..01189abe3bf1da3751fbd323fb5ae78ea338e779 100644
>--- a/Source/WebCore/html/BaseTextInputType.cpp
>+++ b/Source/WebCore/html/BaseTextInputType.cpp
>@@ -43,7 +43,7 @@ bool BaseTextInputType::patternMismatch(const String& value) const
> ASSERT(element());
> // FIXME: We should execute RegExp parser first to check validity instead of creating an actual RegularExpression.
> // https://bugs.webkit.org/show_bug.cgi?id=183361
>- const AtomicString& rawPattern = element()->attributeWithoutSynchronization(patternAttr);
>+ const AtomString& rawPattern = element()->attributeWithoutSynchronization(patternAttr);
> if (rawPattern.isNull() || value.isEmpty() || !JSC::Yarr::RegularExpression(rawPattern, JSC::Yarr::TextCaseSensitive, JSC::Yarr::MultilineDisabled, JSC::Yarr::UnicodeAwareMode).isValid())
> return false;
> String pattern = "^(?:" + rawPattern + ")$";
>diff --git a/Source/WebCore/html/ButtonInputType.cpp b/Source/WebCore/html/ButtonInputType.cpp
>index cb452e643f51e5b36697cfe1112c21cb03fb663c..e9518652b3149d56cae5205c72f45b5fcd8dc72c 100644
>--- a/Source/WebCore/html/ButtonInputType.cpp
>+++ b/Source/WebCore/html/ButtonInputType.cpp
>@@ -35,7 +35,7 @@
> 
> namespace WebCore {
> 
>-const AtomicString& ButtonInputType::formControlType() const
>+const AtomString& ButtonInputType::formControlType() const
> {
> return InputTypeNames::button();
> }
>diff --git a/Source/WebCore/html/ButtonInputType.h b/Source/WebCore/html/ButtonInputType.h
>index cc2fd62fc798d5395569ca67ab3c0a2076ffad7d..861f95a69c80a818cc40a91b158fd001a77d3048 100644
>--- a/Source/WebCore/html/ButtonInputType.h
>+++ b/Source/WebCore/html/ButtonInputType.h
>@@ -39,7 +39,7 @@ public:
> explicit ButtonInputType(HTMLInputElement& element) : BaseButtonInputType(element) { }
> 
> private:
>- const AtomicString& formControlType() const override;
>+ const AtomString& formControlType() const override;
> bool supportsValidation() const override;
> bool isTextButton() const override;
> };
>diff --git a/Source/WebCore/html/CachedHTMLCollection.h b/Source/WebCore/html/CachedHTMLCollection.h
>index 2c052a718073cfde09ba9c534398dbd71d30e4bc..79f477d74f224e71b46aba477f6cdb0da89df485 100644
>--- a/Source/WebCore/html/CachedHTMLCollection.h
>+++ b/Source/WebCore/html/CachedHTMLCollection.h
>@@ -42,7 +42,7 @@ public:
> 
> unsigned length() const final { return m_indexCache.nodeCount(collection()); }
> Element* item(unsigned offset) const override { return m_indexCache.nodeAt(collection(), offset); }
>- Element* namedItem(const AtomicString& name) const override;
>+ Element* namedItem(const AtomString& name) const override;
> size_t memoryCost() const final
> {
> // memoryCost() may be invoked concurrently from a GC thread, and we need to be careful about what data we access here and how.
>@@ -129,7 +129,7 @@ static inline bool nameShouldBeVisibleInDocumentAll(Element& element)
> }
> 
> template <typename HTMLCollectionClass, CollectionTraversalType traversalType>
>-Element* CachedHTMLCollection<HTMLCollectionClass, traversalType>::namedItem(const AtomicString& name) const
>+Element* CachedHTMLCollection<HTMLCollectionClass, traversalType>::namedItem(const AtomString& name) const
> {
> // http://msdn.microsoft.com/workshop/author/dhtml/reference/methods/nameditem.asp
> // This method first searches for an object with a matching id
>diff --git a/Source/WebCore/html/CheckboxInputType.cpp b/Source/WebCore/html/CheckboxInputType.cpp
>index 4103a7a1f9713e61f6a5a38eddf349e0cead5014..4132011dfc0a518d010449ef8cd623f04ed7b4fe 100644
>--- a/Source/WebCore/html/CheckboxInputType.cpp
>+++ b/Source/WebCore/html/CheckboxInputType.cpp
>@@ -39,7 +39,7 @@
> 
> namespace WebCore {
> 
>-const AtomicString& CheckboxInputType::formControlType() const
>+const AtomString& CheckboxInputType::formControlType() const
> {
> return InputTypeNames::checkbox();
> }
>diff --git a/Source/WebCore/html/CheckboxInputType.h b/Source/WebCore/html/CheckboxInputType.h
>index 69a907099eaffc26ec7cc7b44363d4633a9838f7..eb11b1b176ebb5c53035744c55dec4013073f180 100644
>--- a/Source/WebCore/html/CheckboxInputType.h
>+++ b/Source/WebCore/html/CheckboxInputType.h
>@@ -39,7 +39,7 @@ public:
> explicit CheckboxInputType(HTMLInputElement& element) : BaseCheckableInputType(element) { }
> 
> private:
>- const AtomicString& formControlType() const final;
>+ const AtomString& formControlType() const final;
> bool valueMissing(const String&) const final;
> String valueMissingText() const final;
> void handleKeyupEvent(KeyboardEvent&) final;
>diff --git a/Source/WebCore/html/ColorInputType.cpp b/Source/WebCore/html/ColorInputType.cpp
>index 9c07bbd4168418d7695e8d5c929a9a3032a5d812..b949a691f60fdc99c2d7f67fdf8b7753858e3928 100644
>--- a/Source/WebCore/html/ColorInputType.cpp
>+++ b/Source/WebCore/html/ColorInputType.cpp
>@@ -109,7 +109,7 @@ bool ColorInputType::isPresentingAttachedView() const
> return !!m_chooser;
> }
> 
>-const AtomicString& ColorInputType::formControlType() const
>+const AtomString& ColorInputType::formControlType() const
> {
> return InputTypeNames::color();
> }
>@@ -145,9 +145,9 @@ void ColorInputType::createShadowSubtree()
> 
> Document& document = element()->document();
> auto wrapperElement = HTMLDivElement::create(document);
>- wrapperElement->setPseudo(AtomicString("-webkit-color-swatch-wrapper", AtomicString::ConstructFromLiteral));
>+ wrapperElement->setPseudo(AtomString("-webkit-color-swatch-wrapper", AtomString::ConstructFromLiteral));
> auto colorSwatch = HTMLDivElement::create(document);
>- colorSwatch->setPseudo(AtomicString("-webkit-color-swatch", AtomicString::ConstructFromLiteral));
>+ colorSwatch->setPseudo(AtomString("-webkit-color-swatch", AtomString::ConstructFromLiteral));
> wrapperElement->appendChild(colorSwatch);
> element()->userAgentShadowRoot()->appendChild(wrapperElement);
> 
>diff --git a/Source/WebCore/html/ColorInputType.h b/Source/WebCore/html/ColorInputType.h
>index d89236cfce555872b40022a2fabba8a9c0654ae5..9a3c7b717351059e64fe415e9180c452e3a9b3c4 100644
>--- a/Source/WebCore/html/ColorInputType.h
>+++ b/Source/WebCore/html/ColorInputType.h
>@@ -55,7 +55,7 @@ private:
> bool isKeyboardFocusable(KeyboardEvent*) const final;
> bool isColorControl() const final;
> bool isPresentingAttachedView() const final;
>- const AtomicString& formControlType() const final;
>+ const AtomString& formControlType() const final;
> bool supportsRequired() const final;
> String fallbackValue() const final;
> String sanitizeValue(const String&) const final;
>diff --git a/Source/WebCore/html/DOMTokenList.cpp b/Source/WebCore/html/DOMTokenList.cpp
>index af00911e06ecc57ed38a468322293532c35a6dfa..7af20a3f4ba96c28a1906e5092cb8b91da4c684b 100644
>--- a/Source/WebCore/html/DOMTokenList.cpp
>+++ b/Source/WebCore/html/DOMTokenList.cpp
>@@ -30,7 +30,7 @@
> #include "SpaceSplitString.h"
> #include <wtf/HashSet.h>
> #include <wtf/SetForScope.h>
>-#include <wtf/text/AtomicStringHash.h>
>+#include <wtf/text/AtomStringHash.h>
> #include <wtf/text/StringBuilder.h>
> 
> namespace WebCore {
>@@ -68,7 +68,7 @@ ExceptionOr<void> DOMTokenList::validateTokens(const String* tokens, size_t leng
> return { };
> }
> 
>-bool DOMTokenList::contains(const AtomicString& token) const
>+bool DOMTokenList::contains(const AtomString& token) const
> {
> return tokens().contains(token);
> }
>@@ -76,7 +76,7 @@ bool DOMTokenList::contains(const AtomicString& token) const
> inline ExceptionOr<void> DOMTokenList::addInternal(const String* newTokens, size_t length)
> {
> // This is usually called with a single token.
>- Vector<AtomicString, 1> uniqueNewTokens;
>+ Vector<AtomString, 1> uniqueNewTokens;
> uniqueNewTokens.reserveInitialCapacity(length);
> 
> auto& tokens = this->tokens();
>@@ -102,7 +102,7 @@ ExceptionOr<void> DOMTokenList::add(const Vector<String>& tokens)
> return addInternal(tokens.data(), tokens.size());
> }
> 
>-ExceptionOr<void> DOMTokenList::add(const AtomicString& token)
>+ExceptionOr<void> DOMTokenList::add(const AtomString& token)
> {
> return addInternal(&token.string(), 1);
> }
>@@ -127,12 +127,12 @@ ExceptionOr<void> DOMTokenList::remove(const Vector<String>& tokens)
> return removeInternal(tokens.data(), tokens.size());
> }
> 
>-ExceptionOr<void> DOMTokenList::remove(const AtomicString& token)
>+ExceptionOr<void> DOMTokenList::remove(const AtomString& token)
> {
> return removeInternal(&token.string(), 1);
> }
> 
>-ExceptionOr<bool> DOMTokenList::toggle(const AtomicString& token, Optional<bool> force)
>+ExceptionOr<bool> DOMTokenList::toggle(const AtomString& token, Optional<bool> force)
> {
> auto result = validateToken(token);
> if (result.hasException())
>@@ -157,7 +157,7 @@ ExceptionOr<bool> DOMTokenList::toggle(const AtomicString& token, Optional<bool>
> return true;
> }
> 
>-static inline void replaceInOrderedSet(Vector<AtomicString>& tokens, size_t tokenIndex, const AtomicString& newToken)
>+static inline void replaceInOrderedSet(Vector<AtomString>& tokens, size_t tokenIndex, const AtomString& newToken)
> {
> ASSERT(tokenIndex != notFound);
> ASSERT(tokenIndex < tokens.size());
>@@ -179,7 +179,7 @@ static inline void replaceInOrderedSet(Vector<AtomicString>& tokens, size_t toke
> }
> 
> // https://dom.spec.whatwg.org/#dom-domtokenlist-replace
>-ExceptionOr<bool> DOMTokenList::replace(const AtomicString& token, const AtomicString& newToken)
>+ExceptionOr<bool> DOMTokenList::replace(const AtomString& token, const AtomString& newToken)
> {
> if (token.isEmpty() || newToken.isEmpty())
> return Exception { SyntaxError };
>@@ -210,7 +210,7 @@ ExceptionOr<bool> DOMTokenList::supports(StringView token)
> }
> 
> // https://dom.spec.whatwg.org/#dom-domtokenlist-value
>-const AtomicString& DOMTokenList::value() const
>+const AtomString& DOMTokenList::value() const
> {
> return m_element.getAttribute(m_attributeName);
> }
>@@ -225,7 +225,7 @@ void DOMTokenList::updateTokensFromAttributeValue(const String& value)
> // Clear tokens but not capacity.
> m_tokens.shrink(0);
> 
>- HashSet<AtomicString> addedTokens;
>+ HashSet<AtomString> addedTokens;
> // https://dom.spec.whatwg.org/#ordered%20sets
> for (unsigned start = 0; ; ) {
> while (start < value.length() && isHTMLSpace(value[start]))
>@@ -236,7 +236,7 @@ void DOMTokenList::updateTokensFromAttributeValue(const String& value)
> while (end < value.length() && !isHTMLSpace(value[end]))
> ++end;
> 
>- AtomicString token = value.substring(start, end - start);
>+ AtomString token = value.substring(start, end - start);
> if (!addedTokens.contains(token)) {
> m_tokens.append(token);
> addedTokens.add(token);
>@@ -249,7 +249,7 @@ void DOMTokenList::updateTokensFromAttributeValue(const String& value)
> m_tokensNeedUpdating = false;
> }
> 
>-void DOMTokenList::associatedAttributeValueChanged(const AtomicString&)
>+void DOMTokenList::associatedAttributeValueChanged(const AtomString&)
> {
> // Do not reset the DOMTokenList value if the attribute value was changed by us.
> if (m_inUpdateAssociatedAttributeFromTokens)
>@@ -273,13 +273,13 @@ void DOMTokenList::updateAssociatedAttributeFromTokens()
> builder.append(' ');
> builder.append(token);
> }
>- AtomicString serializedValue = builder.toAtomicString();
>+ AtomString serializedValue = builder.toAtomString();
> 
> SetForScope<bool> inAttributeUpdate(m_inUpdateAssociatedAttributeFromTokens, true);
> m_element.setAttribute(m_attributeName, serializedValue);
> }
> 
>-Vector<AtomicString>& DOMTokenList::tokens()
>+Vector<AtomString>& DOMTokenList::tokens()
> {
> if (m_tokensNeedUpdating)
> updateTokensFromAttributeValue(m_element.getAttribute(m_attributeName));
>diff --git a/Source/WebCore/html/DOMTokenList.h b/Source/WebCore/html/DOMTokenList.h
>index 8c0267e84d6351f4b1621a1a55b22b734e61f8f0..b32402d037da90d8fea2faad46d97af73d628086 100644
>--- a/Source/WebCore/html/DOMTokenList.h
>+++ b/Source/WebCore/html/DOMTokenList.h
>@@ -35,34 +35,34 @@ public:
> using IsSupportedTokenFunction = WTF::Function<bool(Document&, StringView)>;
> DOMTokenList(Element&, const QualifiedName& attributeName, IsSupportedTokenFunction&& isSupportedToken = { });
> 
>- void associatedAttributeValueChanged(const AtomicString&);
>+ void associatedAttributeValueChanged(const AtomString&);
> 
> void ref() { m_element.ref(); }
> void deref() { m_element.deref(); }
> 
> unsigned length() const;
>- const AtomicString& item(unsigned index) const;
>+ const AtomString& item(unsigned index) const;
> 
>- WEBCORE_EXPORT bool contains(const AtomicString&) const;
>+ WEBCORE_EXPORT bool contains(const AtomString&) const;
> ExceptionOr<void> add(const Vector<String>&);
>- ExceptionOr<void> add(const AtomicString&);
>+ ExceptionOr<void> add(const AtomString&);
> ExceptionOr<void> remove(const Vector<String>&);
>- ExceptionOr<void> remove(const AtomicString&);
>- WEBCORE_EXPORT ExceptionOr<bool> toggle(const AtomicString&, Optional<bool> force);
>- ExceptionOr<bool> replace(const AtomicString& token, const AtomicString& newToken);
>+ ExceptionOr<void> remove(const AtomString&);
>+ WEBCORE_EXPORT ExceptionOr<bool> toggle(const AtomString&, Optional<bool> force);
>+ ExceptionOr<bool> replace(const AtomString& token, const AtomString& newToken);
> ExceptionOr<bool> supports(StringView token);
> 
> Element& element() const { return m_element; }
> 
> WEBCORE_EXPORT void setValue(const String&);
>- WEBCORE_EXPORT const AtomicString& value() const;
>+ WEBCORE_EXPORT const AtomString& value() const;
> 
> private:
> void updateTokensFromAttributeValue(const String&);
> void updateAssociatedAttributeFromTokens();
> 
>- WEBCORE_EXPORT Vector<AtomicString>& tokens();
>- const Vector<AtomicString>& tokens() const { return const_cast<DOMTokenList&>(*this).tokens(); }
>+ WEBCORE_EXPORT Vector<AtomString>& tokens();
>+ const Vector<AtomString>& tokens() const { return const_cast<DOMTokenList&>(*this).tokens(); }
> 
> static ExceptionOr<void> validateToken(const String&);
> static ExceptionOr<void> validateTokens(const String* tokens, size_t length);
>@@ -73,7 +73,7 @@ private:
> const WebCore::QualifiedName& m_attributeName;
> bool m_inUpdateAssociatedAttributeFromTokens { false };
> bool m_tokensNeedUpdating { true };
>- Vector<AtomicString> m_tokens;
>+ Vector<AtomString> m_tokens;
> IsSupportedTokenFunction m_isSupportedToken;
> };
> 
>@@ -82,7 +82,7 @@ inline unsigned DOMTokenList::length() const
> return tokens().size();
> }
> 
>-inline const AtomicString& DOMTokenList::item(unsigned index) const
>+inline const AtomString& DOMTokenList::item(unsigned index) const
> {
> auto& tokens = this->tokens();
> return index < tokens.size() ? tokens[index] : nullAtom();
>diff --git a/Source/WebCore/html/DateInputType.cpp b/Source/WebCore/html/DateInputType.cpp
>index c848a87dc670a79bb9a78918d032036712cd669c..79df52d76b37e7fee78029ee78872eae2f0f7fdd 100644
>--- a/Source/WebCore/html/DateInputType.cpp
>+++ b/Source/WebCore/html/DateInputType.cpp
>@@ -50,7 +50,7 @@ DateInputType::DateInputType(HTMLInputElement& element)
> {
> }
> 
>-const AtomicString& DateInputType::formControlType() const
>+const AtomString& DateInputType::formControlType() const
> {
> return InputTypeNames::date();
> }
>diff --git a/Source/WebCore/html/DateInputType.h b/Source/WebCore/html/DateInputType.h
>index 5be1ec3f3f0dd9e701e98166fbdc33a51eddd8b8..0ff702c8629e02895e7e2e2a793d44206670f478 100644
>--- a/Source/WebCore/html/DateInputType.h
>+++ b/Source/WebCore/html/DateInputType.h
>@@ -41,7 +41,7 @@ public:
> explicit DateInputType(HTMLInputElement&);
> 
> private:
>- const AtomicString& formControlType() const override;
>+ const AtomString& formControlType() const override;
> DateComponents::Type dateType() const override;
> StepRange createStepRange(AnyStepHandling) const override;
> bool parseToDateComponentsInternal(const UChar*, unsigned length, DateComponents*) const override;
>diff --git a/Source/WebCore/html/DateTimeInputType.cpp b/Source/WebCore/html/DateTimeInputType.cpp
>index ecfd638d6695c2b9ec6d376470ab2ace4ae518e7..5bee39fea7007d252974b8e57646696953141949 100644
>--- a/Source/WebCore/html/DateTimeInputType.cpp
>+++ b/Source/WebCore/html/DateTimeInputType.cpp
>@@ -45,7 +45,7 @@ static const int dateTimeDefaultStepBase = 0;
> static const int dateTimeStepScaleFactor = 1000;
> static const StepRange::StepDescription dateTimeStepDescription { dateTimeDefaultStep, dateTimeDefaultStepBase, dateTimeStepScaleFactor, StepRange::ScaledStepValueShouldBeInteger };
> 
>-const AtomicString& DateTimeInputType::formControlType() const
>+const AtomString& DateTimeInputType::formControlType() const
> {
> return InputTypeNames::datetime();
> }
>diff --git a/Source/WebCore/html/DateTimeInputType.h b/Source/WebCore/html/DateTimeInputType.h
>index c87ac7b08cf45584a0af4349b5dddffea31c8ab8..ab550e65e2b308f72c59cf76b26abd3b1e56974d 100644
>--- a/Source/WebCore/html/DateTimeInputType.h
>+++ b/Source/WebCore/html/DateTimeInputType.h
>@@ -42,7 +42,7 @@ public:
> explicit DateTimeInputType(HTMLInputElement& element) : BaseDateTimeInputType(element) { }
> 
> private:
>- const AtomicString& formControlType() const override;
>+ const AtomString& formControlType() const override;
> DateComponents::Type dateType() const override;
> StepRange createStepRange(AnyStepHandling) const override;
> Decimal defaultValueForStepUp() const override;
>diff --git a/Source/WebCore/html/DateTimeLocalInputType.cpp b/Source/WebCore/html/DateTimeLocalInputType.cpp
>index 7cac1d9cbd633b95419b8e1fbf21b9e21613c98d..f1042f7b0f7cf8791aeb785d40eedef8c217b5ee 100644
>--- a/Source/WebCore/html/DateTimeLocalInputType.cpp
>+++ b/Source/WebCore/html/DateTimeLocalInputType.cpp
>@@ -46,7 +46,7 @@ static const int dateTimeLocalDefaultStepBase = 0;
> static const int dateTimeLocalStepScaleFactor = 1000;
> static const StepRange::StepDescription dateTimeLocalStepDescription { dateTimeLocalDefaultStep, dateTimeLocalDefaultStepBase, dateTimeLocalStepScaleFactor, StepRange::ScaledStepValueShouldBeInteger };
> 
>-const AtomicString& DateTimeLocalInputType::formControlType() const
>+const AtomString& DateTimeLocalInputType::formControlType() const
> {
> return InputTypeNames::datetimelocal();
> }
>diff --git a/Source/WebCore/html/DateTimeLocalInputType.h b/Source/WebCore/html/DateTimeLocalInputType.h
>index 7a086bc9aee7da9e48b22d61b806213206c09114..340aa9257179bd9759732c4baf769f558bd23d4d 100644
>--- a/Source/WebCore/html/DateTimeLocalInputType.h
>+++ b/Source/WebCore/html/DateTimeLocalInputType.h
>@@ -41,7 +41,7 @@ public:
> explicit DateTimeLocalInputType(HTMLInputElement& element) : BaseChooserOnlyDateAndTimeInputType(element) { }
> 
> private:
>- const AtomicString& formControlType() const final;
>+ const AtomString& formControlType() const final;
> DateComponents::Type dateType() const final;
> double valueAsDate() const final;
> ExceptionOr<void> setValueAsDate(double) const final;
>diff --git a/Source/WebCore/html/EmailInputType.cpp b/Source/WebCore/html/EmailInputType.cpp
>index 42553693988b93dd1b5903f321181df9921293ae..dee5cc4bfa4817682007125a1da9524ec98b8e84 100644
>--- a/Source/WebCore/html/EmailInputType.cpp
>+++ b/Source/WebCore/html/EmailInputType.cpp
>@@ -52,7 +52,7 @@ static bool isValidEmailAddress(const String& address)
> return !matchOffset && matchLength == addressLength;
> }
> 
>-const AtomicString& EmailInputType::formControlType() const
>+const AtomString& EmailInputType::formControlType() const
> {
> return InputTypeNames::email();
> }
>diff --git a/Source/WebCore/html/EmailInputType.h b/Source/WebCore/html/EmailInputType.h
>index 0e2fb97252e0cc09e1f7aacd7d456054f47ebf77..02ad3db3a5e651d7a179f394a761299af2901cd5 100644
>--- a/Source/WebCore/html/EmailInputType.h
>+++ b/Source/WebCore/html/EmailInputType.h
>@@ -39,7 +39,7 @@ public:
> explicit EmailInputType(HTMLInputElement& element) : BaseTextInputType(element) { }
> 
> private:
>- const AtomicString& formControlType() const override;
>+ const AtomString& formControlType() const override;
> bool typeMismatchFor(const String&) const override;
> bool typeMismatch() const override;
> String typeMismatchText() const override;
>diff --git a/Source/WebCore/html/FTPDirectoryDocument.cpp b/Source/WebCore/html/FTPDirectoryDocument.cpp
>index 02cc0804ffe2c7dfdd332c9b230181fe731b8911..f5630749f4e2fa8bfffd3713a5f6f119cb60b2fc 100644
>--- a/Source/WebCore/html/FTPDirectoryDocument.cpp
>+++ b/Source/WebCore/html/FTPDirectoryDocument.cpp
>@@ -112,28 +112,28 @@ void FTPDirectoryDocumentParser::appendEntry(const String& filename, const Strin
> auto& document = *this->document();
> 
> auto rowElement = m_tableElement->insertRow(-1).releaseReturnValue();
>- rowElement->setAttributeWithoutSynchronization(HTMLNames::classAttr, AtomicString("ftpDirectoryEntryRow", AtomicString::ConstructFromLiteral));
>+ rowElement->setAttributeWithoutSynchronization(HTMLNames::classAttr, AtomString("ftpDirectoryEntryRow", AtomString::ConstructFromLiteral));
> 
> auto typeElement = HTMLTableCellElement::create(tdTag, document);
> typeElement->appendChild(Text::create(document, String(&noBreakSpace, 1)));
> if (isDirectory)
>- typeElement->setAttributeWithoutSynchronization(HTMLNames::classAttr, AtomicString("ftpDirectoryIcon ftpDirectoryTypeDirectory", AtomicString::ConstructFromLiteral));
>+ typeElement->setAttributeWithoutSynchronization(HTMLNames::classAttr, AtomString("ftpDirectoryIcon ftpDirectoryTypeDirectory", AtomString::ConstructFromLiteral));
> else
>- typeElement->setAttributeWithoutSynchronization(HTMLNames::classAttr, AtomicString("ftpDirectoryIcon ftpDirectoryTypeFile", AtomicString::ConstructFromLiteral));
>+ typeElement->setAttributeWithoutSynchronization(HTMLNames::classAttr, AtomString("ftpDirectoryIcon ftpDirectoryTypeFile", AtomString::ConstructFromLiteral));
> rowElement->appendChild(typeElement);
> 
> auto nameElement = createTDForFilename(filename);
>- nameElement->setAttributeWithoutSynchronization(HTMLNames::classAttr, AtomicString("ftpDirectoryFileName", AtomicString::ConstructFromLiteral));
>+ nameElement->setAttributeWithoutSynchronization(HTMLNames::classAttr, AtomString("ftpDirectoryFileName", AtomString::ConstructFromLiteral));
> rowElement->appendChild(nameElement);
> 
> auto dateElement = HTMLTableCellElement::create(tdTag, document);
> dateElement->appendChild(Text::create(document, date));
>- dateElement->setAttributeWithoutSynchronization(HTMLNames::classAttr, AtomicString("ftpDirectoryFileDate", AtomicString::ConstructFromLiteral));
>+ dateElement->setAttributeWithoutSynchronization(HTMLNames::classAttr, AtomString("ftpDirectoryFileDate", AtomString::ConstructFromLiteral));
> rowElement->appendChild(dateElement);
> 
> auto sizeElement = HTMLTableCellElement::create(tdTag, document);
> sizeElement->appendChild(Text::create(document, size));
>- sizeElement->setAttributeWithoutSynchronization(HTMLNames::classAttr, AtomicString("ftpDirectoryFileSize", AtomicString::ConstructFromLiteral));
>+ sizeElement->setAttributeWithoutSynchronization(HTMLNames::classAttr, AtomString("ftpDirectoryFileSize", AtomString::ConstructFromLiteral));
> rowElement->appendChild(sizeElement);
> }
> 
>@@ -314,7 +314,7 @@ bool FTPDirectoryDocumentParser::loadDocumentTemplate()
> }
> 
> m_tableElement = HTMLTableElement::create(document);
>- m_tableElement->setAttributeWithoutSynchronization(HTMLNames::idAttr, AtomicString("ftpDirectoryTable", AtomicString::ConstructFromLiteral));
>+ m_tableElement->setAttributeWithoutSynchronization(HTMLNames::idAttr, AtomString("ftpDirectoryTable", AtomString::ConstructFromLiteral));
> 
> // If we didn't find the table element, lets try to append our own to the body.
> // If that fails for some reason, cram it on the end of the document as a last ditch effort.
>@@ -336,8 +336,8 @@ void FTPDirectoryDocumentParser::createBasicDocument()
> document.appendChild(bodyElement);
> 
> m_tableElement = HTMLTableElement::create(document);
>- m_tableElement->setAttributeWithoutSynchronization(HTMLNames::idAttr, AtomicString("ftpDirectoryTable", AtomicString::ConstructFromLiteral));
>- m_tableElement->setAttribute(HTMLNames::styleAttr, AtomicString("width:100%", AtomicString::ConstructFromLiteral));
>+ m_tableElement->setAttributeWithoutSynchronization(HTMLNames::idAttr, AtomString("ftpDirectoryTable", AtomString::ConstructFromLiteral));
>+ m_tableElement->setAttribute(HTMLNames::styleAttr, AtomString("width:100%", AtomString::ConstructFromLiteral));
> 
> bodyElement->appendChild(*m_tableElement);
> 
>diff --git a/Source/WebCore/html/FileInputType.cpp b/Source/WebCore/html/FileInputType.cpp
>index c3240505176e662bb40238896450a8ec3b3a1044..afc258839122738d76f04f6b90acca917f1c392d 100644
>--- a/Source/WebCore/html/FileInputType.cpp
>+++ b/Source/WebCore/html/FileInputType.cpp
>@@ -89,8 +89,8 @@ Ref<UploadButtonElement> UploadButtonElement::createForMultiple(Document& docume
> UploadButtonElement::UploadButtonElement(Document& document)
> : HTMLInputElement(inputTag, document, 0, false)
> {
>- setType(AtomicString("button", AtomicString::ConstructFromLiteral));
>- setPseudo(AtomicString("-webkit-file-upload-button", AtomicString::ConstructFromLiteral));
>+ setType(AtomString("button", AtomString::ConstructFromLiteral));
>+ setPseudo(AtomString("-webkit-file-upload-button", AtomString::ConstructFromLiteral));
> }
> 
> FileInputType::FileInputType(HTMLInputElement& element)
>@@ -125,7 +125,7 @@ Vector<FileChooserFileInfo> FileInputType::filesFromFormControlState(const FormC
> return files;
> }
> 
>-const AtomicString& FileInputType::formControlType() const
>+const AtomString& FileInputType::formControlType() const
> {
> return InputTypeNames::file();
> }
>diff --git a/Source/WebCore/html/FileInputType.h b/Source/WebCore/html/FileInputType.h
>index c582cacf1b2e946706dc9b474ef0ee38c4dc83b6..826ac28e31e86ed9a1cc99a156d467e94b03155b 100644
>--- a/Source/WebCore/html/FileInputType.h
>+++ b/Source/WebCore/html/FileInputType.h
>@@ -51,7 +51,7 @@ public:
> static Vector<FileChooserFileInfo> filesFromFormControlState(const FormControlState&);
> 
> private:
>- const AtomicString& formControlType() const final;
>+ const AtomString& formControlType() const final;
> FormControlState saveFormControlState() const final;
> void restoreFormControlState(const FormControlState&) final;
> bool appendFormData(DOMFormData&, bool) const final;
>diff --git a/Source/WebCore/html/FormAssociatedElement.cpp b/Source/WebCore/html/FormAssociatedElement.cpp
>index bd42622014db247cbca55b27acfab1f510f9c0ea..806e5f3daebe294e330230dfa5ede8c92d58c318 100644
>--- a/Source/WebCore/html/FormAssociatedElement.cpp
>+++ b/Source/WebCore/html/FormAssociatedElement.cpp
>@@ -42,7 +42,7 @@ using namespace HTMLNames;
> class FormAttributeTargetObserver final : private IdTargetObserver {
> WTF_MAKE_FAST_ALLOCATED;
> public:
>- FormAttributeTargetObserver(const AtomicString& id, FormAssociatedElement&);
>+ FormAttributeTargetObserver(const AtomString& id, FormAssociatedElement&);
> 
> private:
> void idTargetChanged() override;
>@@ -101,7 +101,7 @@ void FormAssociatedElement::removedFromAncestor(Node::RemovalType, ContainerNode
> 
> HTMLFormElement* FormAssociatedElement::findAssociatedForm(const HTMLElement* element, HTMLFormElement* currentAssociatedForm)
> {
>- const AtomicString& formId(element->attributeWithoutSynchronization(formAttr));
>+ const AtomString& formId(element->attributeWithoutSynchronization(formAttr));
> if (!formId.isNull() && element->isConnected()) {
> // The HTML5 spec says that the element should be associated with
> // the first element in the document to have an ID that equal to
>@@ -287,9 +287,9 @@ void FormAssociatedElement::formAttributeTargetChanged()
> resetFormOwner();
> }
> 
>-const AtomicString& FormAssociatedElement::name() const
>+const AtomString& FormAssociatedElement::name() const
> {
>- const AtomicString& name = asHTMLElement().getNameAttribute();
>+ const AtomString& name = asHTMLElement().getNameAttribute();
> return name.isNull() ? emptyAtom() : name;
> }
> 
>@@ -298,7 +298,7 @@ bool FormAssociatedElement::isFormControlElementWithState() const
> return false;
> }
> 
>-FormAttributeTargetObserver::FormAttributeTargetObserver(const AtomicString& id, FormAssociatedElement& element)
>+FormAttributeTargetObserver::FormAttributeTargetObserver(const AtomString& id, FormAssociatedElement& element)
> : IdTargetObserver(element.asHTMLElement().treeScope().idTargetObserverRegistry(), id)
> , m_element(element)
> {
>diff --git a/Source/WebCore/html/FormAssociatedElement.h b/Source/WebCore/html/FormAssociatedElement.h
>index 88639de1c1e968b466a019003d1cb953b6f13ff1..922ed561b02766eabfeaad55f1492e4d8077e100 100644
>--- a/Source/WebCore/html/FormAssociatedElement.h
>+++ b/Source/WebCore/html/FormAssociatedElement.h
>@@ -58,7 +58,7 @@ public:
> // Returns the 'name' attribute value. If this element has no name
> // attribute, it returns an empty string instead of null string.
> // Note that the 'name' IDL attribute doesn't use this function.
>- virtual const AtomicString& name() const;
>+ virtual const AtomString& name() const;
> 
> // Override in derived classes to get the encoded name=value pair for submitting.
> // Return true for a successful control (see HTML4-17.13.2).
>diff --git a/Source/WebCore/html/FormController.cpp b/Source/WebCore/html/FormController.cpp
>index 4006d196aae832bf592ec44c36924940f39363fb..b7d1035b7589469b155014410812d1c112aa934b 100644
>--- a/Source/WebCore/html/FormController.cpp
>+++ b/Source/WebCore/html/FormController.cpp
>@@ -79,13 +79,13 @@ static inline Optional<FormControlState> deserializeFormControlState(const Vecto
> 
> class FormElementKey {
> public:
>- FormElementKey(AtomicStringImpl* = 0, AtomicStringImpl* = 0);
>+ FormElementKey(AtomStringImpl* = 0, AtomStringImpl* = 0);
> ~FormElementKey();
> FormElementKey(const FormElementKey&);
> FormElementKey& operator=(const FormElementKey&);
> 
>- AtomicStringImpl* name() const { return m_name; }
>- AtomicStringImpl* type() const { return m_type; }
>+ AtomStringImpl* name() const { return m_name; }
>+ AtomStringImpl* type() const { return m_type; }
> 
> // Hash table deleted values, which are only constructed and never copied or destroyed.
> FormElementKey(WTF::HashTableDeletedValueType) : m_name(hashTableDeletedValue()) { }
>@@ -95,13 +95,13 @@ private:
> void ref() const;
> void deref() const;
> 
>- static AtomicStringImpl* hashTableDeletedValue() { return reinterpret_cast<AtomicStringImpl*>(-1); }
>+ static AtomStringImpl* hashTableDeletedValue() { return reinterpret_cast<AtomStringImpl*>(-1); }
> 
>- AtomicStringImpl* m_name;
>- AtomicStringImpl* m_type;
>+ AtomStringImpl* m_name;
>+ AtomStringImpl* m_type;
> };
> 
>-FormElementKey::FormElementKey(AtomicStringImpl* name, AtomicStringImpl* type)
>+FormElementKey::FormElementKey(AtomStringImpl* name, AtomStringImpl* type)
> : m_name(name)
> , m_type(type)
> {
>@@ -177,8 +177,8 @@ public:
> static std::unique_ptr<SavedFormState> deserialize(const Vector<String>&, size_t& index);
> void serializeTo(Vector<String>&) const;
> bool isEmpty() const { return m_stateForNewFormElements.isEmpty(); }
>- void appendControlState(const AtomicString& name, const AtomicString& type, const FormControlState&);
>- FormControlState takeControlState(const AtomicString& name, const AtomicString& type);
>+ void appendControlState(const AtomString& name, const AtomString& type, const FormControlState&);
>+ FormControlState takeControlState(const AtomString& name, const AtomString& type);
> 
> Vector<String> referencedFilePaths() const;
> 
>@@ -227,13 +227,13 @@ void SavedFormState::serializeTo(Vector<String>& stateVector) const
> }
> }
> 
>-void SavedFormState::appendControlState(const AtomicString& name, const AtomicString& type, const FormControlState& state)
>+void SavedFormState::appendControlState(const AtomString& name, const AtomString& type, const FormControlState& state)
> {
> m_stateForNewFormElements.add({ name.impl(), type.impl() }, Deque<FormControlState> { }).iterator->value.append(state);
> ++m_controlStateCount;
> }
> 
>-FormControlState SavedFormState::takeControlState(const AtomicString& name, const AtomicString& type)
>+FormControlState SavedFormState::takeControlState(const AtomString& name, const AtomString& type)
> {
> auto iterator = m_stateForNewFormElements.find({ name.impl(), type.impl() });
> if (iterator == m_stateForNewFormElements.end())
>@@ -268,11 +268,11 @@ class FormKeyGenerator {
> 
> public:
> FormKeyGenerator() = default;
>- AtomicString formKey(const HTMLFormControlElementWithState&);
>+ AtomString formKey(const HTMLFormControlElementWithState&);
> void willDeleteForm(HTMLFormElement*);
> 
> private:
>- typedef HashMap<HTMLFormElement*, AtomicString> FormToKeyMap;
>+ typedef HashMap<HTMLFormElement*, AtomString> FormToKeyMap;
> typedef HashMap<String, unsigned> FormSignatureToNextIndexMap;
> FormToKeyMap m_formToKeyMap;
> FormSignatureToNextIndexMap m_formSignatureToNextIndexMap;
>@@ -291,7 +291,7 @@ static inline void recordFormStructure(const HTMLFormElement& form, StringBuilde
> RefPtr<HTMLFormControlElementWithState> control = static_cast<HTMLFormControlElementWithState*>(controls[i]);
> if (!ownerFormForState(*control))
> continue;
>- AtomicString name = control->name();
>+ AtomString name = control->name();
> if (name.isEmpty())
> continue;
> namedControls++;
>@@ -315,11 +315,11 @@ static inline String formSignature(const HTMLFormElement& form)
> return builder.toString();
> }
> 
>-AtomicString FormKeyGenerator::formKey(const HTMLFormControlElementWithState& control)
>+AtomString FormKeyGenerator::formKey(const HTMLFormControlElementWithState& control)
> {
> auto form = makeRefPtr(ownerFormForState(control));
> if (!form) {
>- static NeverDestroyed<AtomicString> formKeyForNoOwner("No owner", AtomicString::ConstructFromLiteral);
>+ static NeverDestroyed<AtomString> formKeyForNoOwner("No owner", AtomString::ConstructFromLiteral);
> return formKeyForNoOwner;
> }
> 
>@@ -422,7 +422,7 @@ void FormController::formStatesFromStateVector(const Vector<String>& stateVector
> return;
> 
> while (i + 1 < stateVector.size()) {
>- AtomicString formKey = stateVector[i++];
>+ AtomString formKey = stateVector[i++];
> auto state = SavedFormState::deserialize(stateVector, i);
> if (!state) {
> i = 0;
>diff --git a/Source/WebCore/html/FormController.h b/Source/WebCore/html/FormController.h
>index 45aa43dd1940765357a829b7d6f9ef5aa31e9689..9d5268e8a243d2fc70ad6ccb1ae86e70d3c18ee6 100644
>--- a/Source/WebCore/html/FormController.h
>+++ b/Source/WebCore/html/FormController.h
>@@ -61,7 +61,7 @@ public:
> 
> private:
> typedef ListHashSet<RefPtr<HTMLFormControlElementWithState>> FormElementListHashSet;
>- typedef HashMap<RefPtr<AtomicStringImpl>, std::unique_ptr<SavedFormState>> SavedFormStateMap;
>+ typedef HashMap<RefPtr<AtomStringImpl>, std::unique_ptr<SavedFormState>> SavedFormStateMap;
> 
> static std::unique_ptr<SavedFormStateMap> createSavedFormStateMap(const FormElementListHashSet&);
> FormControlState takeStateForFormElement(const HTMLFormControlElementWithState&);
>diff --git a/Source/WebCore/html/HTMLAllCollection.cpp b/Source/WebCore/html/HTMLAllCollection.cpp
>index de90367b182fc37b90c55e7e0e3f14b8949b1490..777c4e7f5be8b44f52f0d43888ac62444a97d11b 100644
>--- a/Source/WebCore/html/HTMLAllCollection.cpp
>+++ b/Source/WebCore/html/HTMLAllCollection.cpp
>@@ -48,7 +48,7 @@ inline HTMLAllCollection::HTMLAllCollection(Document& document, CollectionType t
> }
> 
> // https://html.spec.whatwg.org/multipage/infrastructure.html#dom-htmlallcollection-item
>-Optional<Variant<RefPtr<HTMLCollection>, RefPtr<Element>>> HTMLAllCollection::namedOrIndexedItemOrItems(const AtomicString& nameOrIndex) const
>+Optional<Variant<RefPtr<HTMLCollection>, RefPtr<Element>>> HTMLAllCollection::namedOrIndexedItemOrItems(const AtomString& nameOrIndex) const
> {
> if (nameOrIndex.isNull())
> return WTF::nullopt;
>@@ -60,7 +60,7 @@ Optional<Variant<RefPtr<HTMLCollection>, RefPtr<Element>>> HTMLAllCollection::na
> }
> 
> // https://html.spec.whatwg.org/multipage/infrastructure.html#concept-get-all-named
>-Optional<Variant<RefPtr<HTMLCollection>, RefPtr<Element>>> HTMLAllCollection::namedItemOrItems(const AtomicString& name) const
>+Optional<Variant<RefPtr<HTMLCollection>, RefPtr<Element>>> HTMLAllCollection::namedItemOrItems(const AtomString& name) const
> {
> auto namedItems = this->namedItems(name);
> 
>diff --git a/Source/WebCore/html/HTMLAllCollection.h b/Source/WebCore/html/HTMLAllCollection.h
>index 25fc5a61221ea6ae3c5376e327c6971e5f1c611a..1358416fe3892a99885a6f9f4049cde1d9d37d0b 100644
>--- a/Source/WebCore/html/HTMLAllCollection.h
>+++ b/Source/WebCore/html/HTMLAllCollection.h
>@@ -33,8 +33,8 @@ class HTMLAllCollection final : public AllDescendantsCollection {
> public:
> static Ref<HTMLAllCollection> create(Document&, CollectionType);
> 
>- Optional<Variant<RefPtr<HTMLCollection>, RefPtr<Element>>> namedOrIndexedItemOrItems(const AtomicString& nameOrIndex) const;
>- Optional<Variant<RefPtr<HTMLCollection>, RefPtr<Element>>> namedItemOrItems(const AtomicString&) const;
>+ Optional<Variant<RefPtr<HTMLCollection>, RefPtr<Element>>> namedOrIndexedItemOrItems(const AtomString& nameOrIndex) const;
>+ Optional<Variant<RefPtr<HTMLCollection>, RefPtr<Element>>> namedItemOrItems(const AtomString&) const;
> 
> private:
> HTMLAllCollection(Document&, CollectionType);
>@@ -44,7 +44,7 @@ static_assert(sizeof(HTMLAllCollection) == sizeof(AllDescendantsCollection), "")
> class HTMLAllNamedSubCollection final : public CachedHTMLCollection<HTMLAllNamedSubCollection, CollectionTraversalType::Descendants> {
> WTF_MAKE_ISO_ALLOCATED(HTMLAllNamedSubCollection);
> public:
>- static Ref<HTMLAllNamedSubCollection> create(Document& document, CollectionType type, const AtomicString& name)
>+ static Ref<HTMLAllNamedSubCollection> create(Document& document, CollectionType type, const AtomString& name)
> {
> return adoptRef(*new HTMLAllNamedSubCollection(document, type, name));
> }
>@@ -53,14 +53,14 @@ public:
> bool elementMatches(Element&) const;
> 
> private:
>- HTMLAllNamedSubCollection(Document& document, CollectionType type, const AtomicString& name)
>+ HTMLAllNamedSubCollection(Document& document, CollectionType type, const AtomString& name)
> : CachedHTMLCollection<HTMLAllNamedSubCollection, CollectionTraversalType::Descendants>(document, type)
> , m_name(name)
> {
> ASSERT(type == DocumentAllNamedItems);
> }
> 
>- AtomicString m_name;
>+ AtomString m_name;
> };
> 
> } // namespace WebCore
>diff --git a/Source/WebCore/html/HTMLAnchorElement.cpp b/Source/WebCore/html/HTMLAnchorElement.cpp
>index 41abfe3b7b84b179b6d16df662f2e7ae4bf37d55..1047c58eec3536e3d3993a7b6e58625b015952f1 100644
>--- a/Source/WebCore/html/HTMLAnchorElement.cpp
>+++ b/Source/WebCore/html/HTMLAnchorElement.cpp
>@@ -233,7 +233,7 @@ void HTMLAnchorElement::setActive(bool down, bool pause)
> HTMLElement::setActive(down, pause);
> }
> 
>-void HTMLAnchorElement::parseAttribute(const QualifiedName& name, const AtomicString& value)
>+void HTMLAnchorElement::parseAttribute(const QualifiedName& name, const AtomString& value)
> {
> if (name == hrefAttr) {
> bool wasLink = isLink();
>@@ -251,9 +251,9 @@ void HTMLAnchorElement::parseAttribute(const QualifiedName& name, const AtomicSt
> // Do nothing.
> } else if (name == relAttr) {
> // Update HTMLAnchorElement::relList() if more rel attributes values are supported.
>- static NeverDestroyed<AtomicString> noReferrer("noreferrer", AtomicString::ConstructFromLiteral);
>- static NeverDestroyed<AtomicString> noOpener("noopener", AtomicString::ConstructFromLiteral);
>- static NeverDestroyed<AtomicString> opener("opener", AtomicString::ConstructFromLiteral);
>+ static NeverDestroyed<AtomString> noReferrer("noreferrer", AtomString::ConstructFromLiteral);
>+ static NeverDestroyed<AtomString> noOpener("noopener", AtomString::ConstructFromLiteral);
>+ static NeverDestroyed<AtomString> opener("opener", AtomString::ConstructFromLiteral);
> const bool shouldFoldCase = true;
> SpaceSplitString relValue(value, shouldFoldCase);
> if (relValue.contains(noReferrer))
>@@ -288,7 +288,7 @@ bool HTMLAnchorElement::canStartSelection() const
> 
> bool HTMLAnchorElement::draggable() const
> {
>- const AtomicString& value = attributeWithoutSynchronization(draggableAttr);
>+ const AtomString& value = attributeWithoutSynchronization(draggableAttr);
> if (equalLettersIgnoringASCIICase(value, "true"))
> return true;
> if (equalLettersIgnoringASCIICase(value, "false"))
>@@ -301,7 +301,7 @@ URL HTMLAnchorElement::href() const
> return document().completeURL(stripLeadingAndTrailingHTMLSpaces(attributeWithoutSynchronization(hrefAttr)));
> }
> 
>-void HTMLAnchorElement::setHref(const AtomicString& value)
>+void HTMLAnchorElement::setHref(const AtomString& value)
> {
> setAttributeWithoutSynchronization(hrefAttr, value);
> }
>@@ -325,7 +325,7 @@ DOMTokenList& HTMLAnchorElement::relList() const
> return *m_relList;
> }
> 
>-const AtomicString& HTMLAnchorElement::name() const
>+const AtomString& HTMLAnchorElement::name() const
> {
> return getNameAttribute();
> }
>@@ -380,7 +380,7 @@ bool HTMLAnchorElement::isSystemPreviewLink() const
> if (!RuntimeEnabledFeatures::sharedFeatures().systemPreviewEnabled())
> return false;
> 
>- static NeverDestroyed<AtomicString> systemPreviewRelValue("ar", AtomicString::ConstructFromLiteral);
>+ static NeverDestroyed<AtomString> systemPreviewRelValue("ar", AtomString::ConstructFromLiteral);
> 
> if (!relList().contains(systemPreviewRelValue))
> return false;
>diff --git a/Source/WebCore/html/HTMLAnchorElement.h b/Source/WebCore/html/HTMLAnchorElement.h
>index 4b4bc79048f628da88c6e25509063d86bbfbc3bb..e9d2d880a17ef2e1f8ae13a3006f36d2fa440828 100644
>--- a/Source/WebCore/html/HTMLAnchorElement.h
>+++ b/Source/WebCore/html/HTMLAnchorElement.h
>@@ -50,9 +50,9 @@ public:
> virtual ~HTMLAnchorElement();
> 
> WEBCORE_EXPORT URL href() const;
>- void setHref(const AtomicString&);
>+ void setHref(const AtomString&);
> 
>- const AtomicString& name() const;
>+ const AtomString& name() const;
> 
> WEBCORE_EXPORT String origin() const;
> 
>@@ -76,7 +76,7 @@ public:
> protected:
> HTMLAnchorElement(const QualifiedName&, Document&);
> 
>- void parseAttribute(const QualifiedName&, const AtomicString&) override;
>+ void parseAttribute(const QualifiedName&, const AtomString&) override;
> 
> private:
> bool supportsFocus() const override;
>diff --git a/Source/WebCore/html/HTMLAppletElement.cpp b/Source/WebCore/html/HTMLAppletElement.cpp
>index 9140cb391a04488dafa0c80a5273bba22261f214..c8f5f5da86c8b23f08df008aba46940e2f8d5bbb 100644
>--- a/Source/WebCore/html/HTMLAppletElement.cpp
>+++ b/Source/WebCore/html/HTMLAppletElement.cpp
>@@ -57,7 +57,7 @@ Ref<HTMLAppletElement> HTMLAppletElement::create(const QualifiedName& tagName, D
> return result;
> }
> 
>-void HTMLAppletElement::parseAttribute(const QualifiedName& name, const AtomicString& value)
>+void HTMLAppletElement::parseAttribute(const QualifiedName& name, const AtomString& value)
> {
> if (name == altAttr
> || name == archiveAttr
>@@ -138,19 +138,19 @@ void HTMLAppletElement::updateWidget(CreatePlugins createPlugins)
> paramNames.append("code");
> paramValues.append(attributeWithoutSynchronization(codeAttr).string());
> 
>- const AtomicString& codeBase = attributeWithoutSynchronization(codebaseAttr);
>+ const AtomString& codeBase = attributeWithoutSynchronization(codebaseAttr);
> if (!codeBase.isNull()) {
> paramNames.append("codeBase"_s);
> paramValues.append(codeBase.string());
> }
> 
>- const AtomicString& name = document().isHTMLDocument() ? getNameAttribute() : getIdAttribute();
>+ const AtomString& name = document().isHTMLDocument() ? getNameAttribute() : getIdAttribute();
> if (!name.isNull()) {
> paramNames.append("name");
> paramValues.append(name.string());
> }
> 
>- const AtomicString& archive = attributeWithoutSynchronization(archiveAttr);
>+ const AtomString& archive = attributeWithoutSynchronization(archiveAttr);
> if (!archive.isNull()) {
> paramNames.append("archive"_s);
> paramValues.append(archive.string());
>@@ -159,7 +159,7 @@ void HTMLAppletElement::updateWidget(CreatePlugins createPlugins)
> paramNames.append("baseURL"_s);
> paramValues.append(document().baseURL().string());
> 
>- const AtomicString& mayScript = attributeWithoutSynchronization(mayscriptAttr);
>+ const AtomString& mayScript = attributeWithoutSynchronization(mayscriptAttr);
> if (!mayScript.isNull()) {
> paramNames.append("mayScript"_s);
> paramValues.append(mayScript.string());
>diff --git a/Source/WebCore/html/HTMLAppletElement.h b/Source/WebCore/html/HTMLAppletElement.h
>index 60dd58112ec6f6ca5003a1102be41a8042abb494..0eddedcbfac272fe9b5188eab564e35e854dfc82 100644
>--- a/Source/WebCore/html/HTMLAppletElement.h
>+++ b/Source/WebCore/html/HTMLAppletElement.h
>@@ -34,7 +34,7 @@ public:
> private:
> HTMLAppletElement(const QualifiedName&, Document&);
> 
>- void parseAttribute(const QualifiedName&, const AtomicString&) final;
>+ void parseAttribute(const QualifiedName&, const AtomString&) final;
> bool isURLAttribute(const Attribute&) const final;
> 
> bool rendererIsNeeded(const RenderStyle&) final;
>diff --git a/Source/WebCore/html/HTMLAreaElement.cpp b/Source/WebCore/html/HTMLAreaElement.cpp
>index bab136e8a1c22b2c977586ac864b840fda100f97..ac0758de83b04882a5d8922fd405548ef956dca2 100644
>--- a/Source/WebCore/html/HTMLAreaElement.cpp
>+++ b/Source/WebCore/html/HTMLAreaElement.cpp
>@@ -52,7 +52,7 @@ Ref<HTMLAreaElement> HTMLAreaElement::create(const QualifiedName& tagName, Docum
> return adoptRef(*new HTMLAreaElement(tagName, document));
> }
> 
>-void HTMLAreaElement::parseAttribute(const QualifiedName& name, const AtomicString& value)
>+void HTMLAreaElement::parseAttribute(const QualifiedName& name, const AtomString& value)
> {
> if (name == shapeAttr) {
> if (equalLettersIgnoringASCIICase(value, "default"))
>diff --git a/Source/WebCore/html/HTMLAreaElement.h b/Source/WebCore/html/HTMLAreaElement.h
>index cd6fdbca3b22975cfe8a36b3d4f251933f1a6167..8ef466bb84f66c7cc4260fbf241d9c3d5d7b65db 100644
>--- a/Source/WebCore/html/HTMLAreaElement.h
>+++ b/Source/WebCore/html/HTMLAreaElement.h
>@@ -52,7 +52,7 @@ public:
> private:
> HTMLAreaElement(const QualifiedName&, Document&);
> 
>- void parseAttribute(const QualifiedName&, const AtomicString&) final;
>+ void parseAttribute(const QualifiedName&, const AtomString&) final;
> bool supportsFocus() const final;
> String target() const final;
> bool isKeyboardFocusable(KeyboardEvent*) const final;
>diff --git a/Source/WebCore/html/HTMLAttachmentElement.cpp b/Source/WebCore/html/HTMLAttachmentElement.cpp
>index c040c198d9d1b70d70ec50ef2a49814ebfd3b110..fcfa784a05cd5055b18e36db5898be70adf72611 100644
>--- a/Source/WebCore/html/HTMLAttachmentElement.cpp
>+++ b/Source/WebCore/html/HTMLAttachmentElement.cpp
>@@ -156,7 +156,7 @@ bool HTMLAttachmentElement::hasEnclosingImage() const
> return is<HTMLImageElement>(shadowHost());
> }
> 
>-void HTMLAttachmentElement::parseAttribute(const QualifiedName& name, const AtomicString& value)
>+void HTMLAttachmentElement::parseAttribute(const QualifiedName& name, const AtomString& value)
> {
> if (name == progressAttr || name == subtitleAttr || name == titleAttr || name == typeAttr) {
> if (auto* renderer = this->renderer())
>diff --git a/Source/WebCore/html/HTMLAttachmentElement.h b/Source/WebCore/html/HTMLAttachmentElement.h
>index c84a8bf95df1d49810c4746d98e8a00328887b57..a9bb2475755a28ac2d3179646ab8e3d1a92fbce5 100644
>--- a/Source/WebCore/html/HTMLAttachmentElement.h
>+++ b/Source/WebCore/html/HTMLAttachmentElement.h
>@@ -83,7 +83,7 @@ private:
> #endif
> }
> bool canContainRangeEndPoint() const final { return false; }
>- void parseAttribute(const QualifiedName&, const AtomicString&) final;
>+ void parseAttribute(const QualifiedName&, const AtomString&) final;
> 
> RefPtr<File> m_file;
> String m_uniqueIdentifier;
>diff --git a/Source/WebCore/html/HTMLAudioElement.cpp b/Source/WebCore/html/HTMLAudioElement.cpp
>index dd1331b902ff1dfcdfad26b895db01b7da2fde78..cc8d5937f31478877587918eab3129424fef8da2 100644
>--- a/Source/WebCore/html/HTMLAudioElement.cpp
>+++ b/Source/WebCore/html/HTMLAudioElement.cpp
>@@ -52,7 +52,7 @@ Ref<HTMLAudioElement> HTMLAudioElement::create(const QualifiedName& tagName, Doc
> return element;
> }
> 
>-Ref<HTMLAudioElement> HTMLAudioElement::createForJSConstructor(Document& document, const AtomicString& src)
>+Ref<HTMLAudioElement> HTMLAudioElement::createForJSConstructor(Document& document, const AtomString& src)
> {
> auto element = create(audioTag, document, false);
> element->setAttributeWithoutSynchronization(preloadAttr, "auto");
>diff --git a/Source/WebCore/html/HTMLAudioElement.h b/Source/WebCore/html/HTMLAudioElement.h
>index 2713bf249a781ea7da0b6f85fc0f352feb0a3eb0..76f799a1bbe2218ce9361f2172d23095089ee58d 100644
>--- a/Source/WebCore/html/HTMLAudioElement.h
>+++ b/Source/WebCore/html/HTMLAudioElement.h
>@@ -38,7 +38,7 @@ class HTMLAudioElement final : public HTMLMediaElement {
> WTF_MAKE_ISO_ALLOCATED(HTMLAudioElement);
> public:
> static Ref<HTMLAudioElement> create(const QualifiedName&, Document&, bool);
>- static Ref<HTMLAudioElement> createForJSConstructor(Document&, const AtomicString& src);
>+ static Ref<HTMLAudioElement> createForJSConstructor(Document&, const AtomString& src);
> 
> private:
> HTMLAudioElement(const QualifiedName&, Document&, bool);
>diff --git a/Source/WebCore/html/HTMLAudioElement.idl b/Source/WebCore/html/HTMLAudioElement.idl
>index e112b6aa47b36a70f3b940c237af206df6e6801a..8db1022d04711c6026b4be1734ef85a79598a065 100644
>--- a/Source/WebCore/html/HTMLAudioElement.idl
>+++ b/Source/WebCore/html/HTMLAudioElement.idl
>@@ -26,6 +26,6 @@
> [
> Conditional=VIDEO,
> ConstructorCallWith=Document,
>- NamedConstructor=Audio(optional [AtomicString] DOMString src)
>+ NamedConstructor=Audio(optional [AtomString] DOMString src)
> ] interface HTMLAudioElement : HTMLMediaElement {
> };
>diff --git a/Source/WebCore/html/HTMLBRElement.cpp b/Source/WebCore/html/HTMLBRElement.cpp
>index 9956c06e3db87f1993a9805b5872e54e99fb5ffd..7207e7fa87aa7715d159d833ef8f1766b9dac8a1 100644
>--- a/Source/WebCore/html/HTMLBRElement.cpp
>+++ b/Source/WebCore/html/HTMLBRElement.cpp
>@@ -58,7 +58,7 @@ bool HTMLBRElement::isPresentationAttribute(const QualifiedName& name) const
> return HTMLElement::isPresentationAttribute(name);
> }
> 
>-void HTMLBRElement::collectStyleForPresentationAttribute(const QualifiedName& name, const AtomicString& value, MutableStyleProperties& style)
>+void HTMLBRElement::collectStyleForPresentationAttribute(const QualifiedName& name, const AtomString& value, MutableStyleProperties& style)
> {
> if (name == clearAttr) {
> // If the string is empty, then don't add the clear property.
>diff --git a/Source/WebCore/html/HTMLBRElement.h b/Source/WebCore/html/HTMLBRElement.h
>index 6adc116d0d759faee32df99407ca1d2bd9e44929..0bb7968c6253c1e292ef84049b79d8eff25e3c22 100644
>--- a/Source/WebCore/html/HTMLBRElement.h
>+++ b/Source/WebCore/html/HTMLBRElement.h
>@@ -39,7 +39,7 @@ private:
> HTMLBRElement(const QualifiedName&, Document&);
> 
> bool isPresentationAttribute(const QualifiedName&) const final;
>- void collectStyleForPresentationAttribute(const QualifiedName&, const AtomicString&, MutableStyleProperties&) final;
>+ void collectStyleForPresentationAttribute(const QualifiedName&, const AtomString&, MutableStyleProperties&) final;
> 
> RenderPtr<RenderElement> createElementRenderer(RenderStyle&&, const RenderTreePosition&) final;
> };
>diff --git a/Source/WebCore/html/HTMLBaseElement.cpp b/Source/WebCore/html/HTMLBaseElement.cpp
>index fa411c4daf251035d0993f3922ce2f02d49d4eba..aa0688cadfed6f659a37c3be8381dc8cf13c5754 100644
>--- a/Source/WebCore/html/HTMLBaseElement.cpp
>+++ b/Source/WebCore/html/HTMLBaseElement.cpp
>@@ -46,7 +46,7 @@ Ref<HTMLBaseElement> HTMLBaseElement::create(const QualifiedName& tagName, Docum
> return adoptRef(*new HTMLBaseElement(tagName, document));
> }
> 
>-void HTMLBaseElement::parseAttribute(const QualifiedName& name, const AtomicString& value)
>+void HTMLBaseElement::parseAttribute(const QualifiedName& name, const AtomString& value)
> {
> if (name == hrefAttr || name == targetAttr)
> document().processBaseElement();
>@@ -85,7 +85,7 @@ URL HTMLBaseElement::href() const
> // base elements like this one can be used to set that base URL. Thus we need to resolve relative to the document's
> // URL and ignore the base URL.
> 
>- const AtomicString& attributeValue = attributeWithoutSynchronization(hrefAttr);
>+ const AtomString& attributeValue = attributeWithoutSynchronization(hrefAttr);
> if (attributeValue.isNull())
> return document().url();
> 
>@@ -98,7 +98,7 @@ URL HTMLBaseElement::href() const
> return url;
> }
> 
>-void HTMLBaseElement::setHref(const AtomicString& value)
>+void HTMLBaseElement::setHref(const AtomString& value)
> {
> setAttributeWithoutSynchronization(hrefAttr, value);
> }
>diff --git a/Source/WebCore/html/HTMLBaseElement.h b/Source/WebCore/html/HTMLBaseElement.h
>index 7cb69d98cf919c2d25f14c96feba8f38e4f5ac76..e8bb9d01f585a275d6407412fcd850e70096f7ff 100644
>--- a/Source/WebCore/html/HTMLBaseElement.h
>+++ b/Source/WebCore/html/HTMLBaseElement.h
>@@ -32,14 +32,14 @@ public:
> static Ref<HTMLBaseElement> create(const QualifiedName&, Document&);
> 
> WEBCORE_EXPORT URL href() const;
>- WEBCORE_EXPORT void setHref(const AtomicString&);
>+ WEBCORE_EXPORT void setHref(const AtomString&);
> 
> private:
> HTMLBaseElement(const QualifiedName&, Document&);
> 
> String target() const final;
> bool isURLAttribute(const Attribute&) const final;
>- void parseAttribute(const QualifiedName&, const AtomicString&) final;
>+ void parseAttribute(const QualifiedName&, const AtomString&) final;
> InsertedIntoAncestorResult insertedIntoAncestor(InsertionType, ContainerNode&) final;
> void removedFromAncestor(RemovalType, ContainerNode&) final;
> };
>diff --git a/Source/WebCore/html/HTMLBodyElement.cpp b/Source/WebCore/html/HTMLBodyElement.cpp
>index 9699ca95ff522c79228def40ee8dc64cc887aff9..49a660deb5bcb5c5c8d1e422277a5b74ab8c4901 100644
>--- a/Source/WebCore/html/HTMLBodyElement.cpp
>+++ b/Source/WebCore/html/HTMLBodyElement.cpp
>@@ -69,7 +69,7 @@ bool HTMLBodyElement::isPresentationAttribute(const QualifiedName& name) const
> return HTMLElement::isPresentationAttribute(name);
> }
> 
>-void HTMLBodyElement::collectStyleForPresentationAttribute(const QualifiedName& name, const AtomicString& value, MutableStyleProperties& style)
>+void HTMLBodyElement::collectStyleForPresentationAttribute(const QualifiedName& name, const AtomString& value, MutableStyleProperties& style)
> {
> if (name == backgroundAttr) {
> String url = stripLeadingAndTrailingHTMLSpaces(value);
>@@ -135,13 +135,13 @@ HTMLElement::EventHandlerNameMap HTMLBodyElement::createWindowEventHandlerNameMa
> return map;
> }
> 
>-const AtomicString& HTMLBodyElement::eventNameForWindowEventHandlerAttribute(const QualifiedName& attributeName)
>+const AtomString& HTMLBodyElement::eventNameForWindowEventHandlerAttribute(const QualifiedName& attributeName)
> {
> static NeverDestroyed<EventHandlerNameMap> map = createWindowEventHandlerNameMap();
> return eventNameForEventHandlerAttribute(attributeName, map.get());
> }
> 
>-void HTMLBodyElement::parseAttribute(const QualifiedName& name, const AtomicString& value)
>+void HTMLBodyElement::parseAttribute(const QualifiedName& name, const AtomString& value)
> {
> if (name == vlinkAttr || name == alinkAttr || name == linkAttr) {
> if (value.isNull()) {
>diff --git a/Source/WebCore/html/HTMLBodyElement.h b/Source/WebCore/html/HTMLBodyElement.h
>index 45b0fbc53cb0c1d7e32e139adac698693d104048..f6a801db40406deb16f9d77e35032f27f9355d02 100644
>--- a/Source/WebCore/html/HTMLBodyElement.h
>+++ b/Source/WebCore/html/HTMLBodyElement.h
>@@ -34,14 +34,14 @@ public:
> static Ref<HTMLBodyElement> create(const QualifiedName&, Document&);
> virtual ~HTMLBodyElement();
> 
>- static const AtomicString& eventNameForWindowEventHandlerAttribute(const QualifiedName& attributeName);
>+ static const AtomString& eventNameForWindowEventHandlerAttribute(const QualifiedName& attributeName);
> 
> private:
> HTMLBodyElement(const QualifiedName&, Document&);
> 
>- void parseAttribute(const QualifiedName&, const AtomicString&) final;
>+ void parseAttribute(const QualifiedName&, const AtomString&) final;
> bool isPresentationAttribute(const QualifiedName&) const final;
>- void collectStyleForPresentationAttribute(const QualifiedName&, const AtomicString&, MutableStyleProperties&) final;
>+ void collectStyleForPresentationAttribute(const QualifiedName&, const AtomString&, MutableStyleProperties&) final;
> 
> InsertedIntoAncestorResult insertedIntoAncestor(InsertionType, ContainerNode&) final;
> void didFinishInsertingNode() final;
>diff --git a/Source/WebCore/html/HTMLButtonElement.cpp b/Source/WebCore/html/HTMLButtonElement.cpp
>index ed82b692b23274ed1a6c16143031901e1af510d8..d282957f21f045e41dac46aa15c5d01c36ff3a37 100644
>--- a/Source/WebCore/html/HTMLButtonElement.cpp
>+++ b/Source/WebCore/html/HTMLButtonElement.cpp
>@@ -55,7 +55,7 @@ Ref<HTMLButtonElement> HTMLButtonElement::create(const QualifiedName& tagName, D
> return adoptRef(*new HTMLButtonElement(tagName, document, form));
> }
> 
>-void HTMLButtonElement::setType(const AtomicString& type)
>+void HTMLButtonElement::setType(const AtomString& type)
> {
> setAttributeWithoutSynchronization(typeAttr, type);
> }
>@@ -65,19 +65,19 @@ RenderPtr<RenderElement> HTMLButtonElement::createElementRenderer(RenderStyle&&
> return createRenderer<RenderButton>(*this, WTFMove(style));
> }
> 
>-const AtomicString& HTMLButtonElement::formControlType() const
>+const AtomString& HTMLButtonElement::formControlType() const
> {
> switch (m_type) {
> case SUBMIT: {
>- static NeverDestroyed<const AtomicString> submit("submit", AtomicString::ConstructFromLiteral);
>+ static NeverDestroyed<const AtomString> submit("submit", AtomString::ConstructFromLiteral);
> return submit;
> }
> case BUTTON: {
>- static NeverDestroyed<const AtomicString> button("button", AtomicString::ConstructFromLiteral);
>+ static NeverDestroyed<const AtomString> button("button", AtomString::ConstructFromLiteral);
> return button;
> }
> case RESET: {
>- static NeverDestroyed<const AtomicString> reset("reset", AtomicString::ConstructFromLiteral);
>+ static NeverDestroyed<const AtomString> reset("reset", AtomString::ConstructFromLiteral);
> return reset;
> }
> }
>@@ -97,7 +97,7 @@ bool HTMLButtonElement::isPresentationAttribute(const QualifiedName& name) const
> return HTMLFormControlElement::isPresentationAttribute(name);
> }
> 
>-void HTMLButtonElement::parseAttribute(const QualifiedName& name, const AtomicString& value)
>+void HTMLButtonElement::parseAttribute(const QualifiedName& name, const AtomString& value)
> {
> if (name == typeAttr) {
> Type oldType = m_type;
>@@ -218,7 +218,7 @@ bool HTMLButtonElement::isURLAttribute(const Attribute& attribute) const
> return attribute.name() == formactionAttr || HTMLFormControlElement::isURLAttribute(attribute);
> }
> 
>-const AtomicString& HTMLButtonElement::value() const
>+const AtomString& HTMLButtonElement::value() const
> {
> return attributeWithoutSynchronization(valueAttr);
> }
>diff --git a/Source/WebCore/html/HTMLButtonElement.h b/Source/WebCore/html/HTMLButtonElement.h
>index 19df246676b3abe23cea002faad4054ceb1cd387..6f013f7cc5cf63900b0e51166701ddfe83aeee1e 100644
>--- a/Source/WebCore/html/HTMLButtonElement.h
>+++ b/Source/WebCore/html/HTMLButtonElement.h
>@@ -34,9 +34,9 @@ class HTMLButtonElement final : public HTMLFormControlElement {
> public:
> static Ref<HTMLButtonElement> create(const QualifiedName&, Document&, HTMLFormElement*);
> 
>- WEBCORE_EXPORT void setType(const AtomicString&);
>+ WEBCORE_EXPORT void setType(const AtomString&);
> 
>- const AtomicString& value() const;
>+ const AtomString& value() const;
> 
> bool willRespondToMouseClickEvents() final;
> 
>@@ -47,11 +47,11 @@ private:
> 
> enum Type { SUBMIT, RESET, BUTTON };
> 
>- const AtomicString& formControlType() const final;
>+ const AtomString& formControlType() const final;
> 
> RenderPtr<RenderElement> createElementRenderer(RenderStyle&&, const RenderTreePosition&) final;
> 
>- void parseAttribute(const QualifiedName&, const AtomicString&) final;
>+ void parseAttribute(const QualifiedName&, const AtomString&) final;
> bool isPresentationAttribute(const QualifiedName&) const final;
> void defaultEventHandler(Event&) final;
> 
>diff --git a/Source/WebCore/html/HTMLCanvasElement.cpp b/Source/WebCore/html/HTMLCanvasElement.cpp
>index 231acfe2d3b2d0d95513dd8a0ec90ae0113e0b49..9bc967a25d0d1ac9391b6b1850e9bbdf8b7d3383 100644
>--- a/Source/WebCore/html/HTMLCanvasElement.cpp
>+++ b/Source/WebCore/html/HTMLCanvasElement.cpp
>@@ -151,7 +151,7 @@ HTMLCanvasElement::~HTMLCanvasElement()
> releaseImageBufferAndContext();
> }
> 
>-void HTMLCanvasElement::parseAttribute(const QualifiedName& name, const AtomicString& value)
>+void HTMLCanvasElement::parseAttribute(const QualifiedName& name, const AtomString& value)
> {
> if (name == widthAttr || name == heightAttr)
> reset();
>@@ -180,7 +180,7 @@ ExceptionOr<void> HTMLCanvasElement::setHeight(unsigned value)
> {
> if (m_context && m_context->isPlaceholder())
> return Exception { InvalidStateError };
>- setAttributeWithoutSynchronization(heightAttr, AtomicString::number(limitToOnlyHTMLNonNegative(value, defaultHeight)));
>+ setAttributeWithoutSynchronization(heightAttr, AtomString::number(limitToOnlyHTMLNonNegative(value, defaultHeight)));
> return { };
> }
> 
>@@ -188,7 +188,7 @@ ExceptionOr<void> HTMLCanvasElement::setWidth(unsigned value)
> {
> if (m_context && m_context->isPlaceholder())
> return Exception { InvalidStateError };
>- setAttributeWithoutSynchronization(widthAttr, AtomicString::number(limitToOnlyHTMLNonNegative(value, defaultWidth)));
>+ setAttributeWithoutSynchronization(widthAttr, AtomString::number(limitToOnlyHTMLNonNegative(value, defaultWidth)));
> return { };
> }
> 
>diff --git a/Source/WebCore/html/HTMLCanvasElement.h b/Source/WebCore/html/HTMLCanvasElement.h
>index 7b52b8f3b7241cddc17547e2b13d5fc3589fa7f6..04148b83583226861b4b332a0f18b81d0f1dea9e 100644
>--- a/Source/WebCore/html/HTMLCanvasElement.h
>+++ b/Source/WebCore/html/HTMLCanvasElement.h
>@@ -157,7 +157,7 @@ private:
> 
> bool isHTMLCanvasElement() const final { return true; }
> 
>- void parseAttribute(const QualifiedName&, const AtomicString&) final;
>+ void parseAttribute(const QualifiedName&, const AtomString&) final;
> RenderPtr<RenderElement> createElementRenderer(RenderStyle&&, const RenderTreePosition&) final;
> 
> bool canContainRangeEndPoint() const final;
>diff --git a/Source/WebCore/html/HTMLCollection.cpp b/Source/WebCore/html/HTMLCollection.cpp
>index 3af95ca391103b05e2d5bc8301bfe4ac114c0da5..976c8e0a9a06a9b83d6ca941bd5dd37b9f3385c5 100644
>--- a/Source/WebCore/html/HTMLCollection.cpp
>+++ b/Source/WebCore/html/HTMLCollection.cpp
>@@ -159,7 +159,7 @@ void HTMLCollection::invalidateNamedElementCache(Document& document) const
> }
> }
> 
>-Element* HTMLCollection::namedItemSlow(const AtomicString& name) const
>+Element* HTMLCollection::namedItemSlow(const AtomString& name) const
> {
> // The pathological case. We need to walk the entire subtree.
> updateNamedElementCache();
>@@ -179,7 +179,7 @@ Element* HTMLCollection::namedItemSlow(const AtomicString& name) const
> }
> 
> // Documented in https://dom.spec.whatwg.org/#interface-htmlcollection.
>-const Vector<AtomicString>& HTMLCollection::supportedPropertyNames()
>+const Vector<AtomString>& HTMLCollection::supportedPropertyNames()
> {
> updateNamedElementCache();
> ASSERT(m_namedElementCache);
>@@ -210,12 +210,12 @@ void HTMLCollection::updateNamedElementCache() const
> unsigned size = length();
> for (unsigned i = 0; i < size; ++i) {
> Element& element = *item(i);
>- const AtomicString& id = element.getIdAttribute();
>+ const AtomString& id = element.getIdAttribute();
> if (!id.isEmpty())
> cache->appendToIdCache(id, element);
> if (!is<HTMLElement>(element))
> continue;
>- const AtomicString& name = element.getNameAttribute();
>+ const AtomString& name = element.getNameAttribute();
> if (!name.isEmpty() && id != name && (type() != DocAll || nameShouldBeVisibleInDocumentAll(downcast<HTMLElement>(element))))
> cache->appendToNameCache(name, element);
> }
>@@ -223,7 +223,7 @@ void HTMLCollection::updateNamedElementCache() const
> setNamedItemCache(WTFMove(cache));
> }
> 
>-Vector<Ref<Element>> HTMLCollection::namedItems(const AtomicString& name) const
>+Vector<Ref<Element>> HTMLCollection::namedItems(const AtomString& name) const
> {
> // FIXME: This non-virtual function can't possibly be doing the correct thing for
> // any derived class that overrides the virtual namedItem function.
>diff --git a/Source/WebCore/html/HTMLCollection.h b/Source/WebCore/html/HTMLCollection.h
>index 4fec76d2973adcdb2c707ac5e3701e5f8ff93fac..f008f3378dab3a681f3e829d81ccbbda9eadbd74 100644
>--- a/Source/WebCore/html/HTMLCollection.h
>+++ b/Source/WebCore/html/HTMLCollection.h
>@@ -34,25 +34,25 @@ class Element;
> class CollectionNamedElementCache {
> WTF_MAKE_FAST_ALLOCATED;
> public:
>- const Vector<Element*>* findElementsWithId(const AtomicString& id) const;
>- const Vector<Element*>* findElementsWithName(const AtomicString& name) const;
>- const Vector<AtomicString>& propertyNames() const { return m_propertyNames; }
>+ const Vector<Element*>* findElementsWithId(const AtomString& id) const;
>+ const Vector<Element*>* findElementsWithName(const AtomString& name) const;
>+ const Vector<AtomString>& propertyNames() const { return m_propertyNames; }
> 
>- void appendToIdCache(const AtomicString& id, Element&);
>- void appendToNameCache(const AtomicString& name, Element&);
>+ void appendToIdCache(const AtomString& id, Element&);
>+ void appendToNameCache(const AtomString& name, Element&);
> void didPopulate();
> 
> size_t memoryCost() const;
> 
> private:
>- typedef HashMap<AtomicStringImpl*, Vector<Element*>> StringToElementsMap;
>+ typedef HashMap<AtomStringImpl*, Vector<Element*>> StringToElementsMap;
> 
>- const Vector<Element*>* find(const StringToElementsMap&, const AtomicString& key) const;
>- void append(StringToElementsMap&, const AtomicString& key, Element&);
>+ const Vector<Element*>* find(const StringToElementsMap&, const AtomString& key) const;
>+ void append(StringToElementsMap&, const AtomString& key, Element&);
> 
> StringToElementsMap m_idMap;
> StringToElementsMap m_nameMap;
>- Vector<AtomicString> m_propertyNames;
>+ Vector<AtomString> m_propertyNames;
> 
> #if !ASSERT_DISABLED
> bool m_didPopulate { false };
>@@ -67,12 +67,12 @@ public:
> 
> // DOM API
> Element* item(unsigned index) const override = 0; // Tighten return type from NodeList::item().
>- virtual Element* namedItem(const AtomicString& name) const = 0;
>- const Vector<AtomicString>& supportedPropertyNames();
>+ virtual Element* namedItem(const AtomString& name) const = 0;
>+ const Vector<AtomString>& supportedPropertyNames();
> bool isSupportedPropertyName(const String& name);
> 
> // Non-DOM API
>- Vector<Ref<Element>> namedItems(const AtomicString& name) const;
>+ Vector<Ref<Element>> namedItems(const AtomString& name) const;
> size_t memoryCost() const override;
> 
> bool isRootedAtDocument() const;
>@@ -90,7 +90,7 @@ protected:
> HTMLCollection(ContainerNode& base, CollectionType);
> 
> virtual void updateNamedElementCache() const;
>- WEBCORE_EXPORT Element* namedItemSlow(const AtomicString& name) const;
>+ WEBCORE_EXPORT Element* namedItemSlow(const AtomString& name) const;
> 
> void setNamedItemCache(std::unique_ptr<CollectionNamedElementCache>) const;
> const CollectionNamedElementCache& namedItemCaches() const;
>@@ -121,22 +121,22 @@ inline ContainerNode& HTMLCollection::rootNode() const
> return ownerNode();
> }
> 
>-inline const Vector<Element*>* CollectionNamedElementCache::findElementsWithId(const AtomicString& id) const
>+inline const Vector<Element*>* CollectionNamedElementCache::findElementsWithId(const AtomString& id) const
> {
> return find(m_idMap, id);
> }
> 
>-inline const Vector<Element*>* CollectionNamedElementCache::findElementsWithName(const AtomicString& name) const
>+inline const Vector<Element*>* CollectionNamedElementCache::findElementsWithName(const AtomString& name) const
> {
> return find(m_nameMap, name);
> }
> 
>-inline void CollectionNamedElementCache::appendToIdCache(const AtomicString& id, Element& element)
>+inline void CollectionNamedElementCache::appendToIdCache(const AtomString& id, Element& element)
> {
> append(m_idMap, id, element);
> }
> 
>-inline void CollectionNamedElementCache::appendToNameCache(const AtomicString& name, Element& element)
>+inline void CollectionNamedElementCache::appendToNameCache(const AtomString& name, Element& element)
> {
> append(m_nameMap, name, element);
> }
>@@ -145,7 +145,7 @@ inline size_t CollectionNamedElementCache::memoryCost() const
> {
> // memoryCost() may be invoked concurrently from a GC thread, and we need to be careful about what data we access here and how.
> // It is safe to access m_idMap.size(), m_nameMap.size(), and m_propertyNames.size() because they don't chase pointers.
>- return (m_idMap.size() + m_nameMap.size()) * sizeof(Element*) + m_propertyNames.size() * sizeof(AtomicString);
>+ return (m_idMap.size() + m_nameMap.size()) * sizeof(Element*) + m_propertyNames.size() * sizeof(AtomString);
> }
> 
> inline void CollectionNamedElementCache::didPopulate()
>@@ -157,14 +157,14 @@ inline void CollectionNamedElementCache::didPopulate()
> reportExtraMemoryAllocatedForCollectionIndexCache(cost);
> }
> 
>-inline const Vector<Element*>* CollectionNamedElementCache::find(const StringToElementsMap& map, const AtomicString& key) const
>+inline const Vector<Element*>* CollectionNamedElementCache::find(const StringToElementsMap& map, const AtomString& key) const
> {
> ASSERT(m_didPopulate);
> auto it = map.find(key.impl());
> return it != map.end() ? &it->value : nullptr;
> }
> 
>-inline void CollectionNamedElementCache::append(StringToElementsMap& map, const AtomicString& key, Element& element)
>+inline void CollectionNamedElementCache::append(StringToElementsMap& map, const AtomString& key, Element& element)
> {
> if (!m_idMap.contains(key.impl()) && !m_nameMap.contains(key.impl()))
> m_propertyNames.append(key);
>diff --git a/Source/WebCore/html/HTMLDetailsElement.cpp b/Source/WebCore/html/HTMLDetailsElement.cpp
>index 3aac1941109904d894c00cacb53593cf66df42fe..f157874e6d534e3f6134e4a5df4f51be2f67a31a 100644
>--- a/Source/WebCore/html/HTMLDetailsElement.cpp
>+++ b/Source/WebCore/html/HTMLDetailsElement.cpp
>@@ -49,16 +49,16 @@ static DetailEventSender& detailToggleEventSender()
> return sharedToggleEventSender;
> }
> 
>-static const AtomicString& summarySlotName()
>+static const AtomString& summarySlotName()
> {
>- static NeverDestroyed<AtomicString> summarySlot("summarySlot");
>+ static NeverDestroyed<AtomString> summarySlot("summarySlot");
> return summarySlot;
> }
> 
> class DetailsSlotAssignment final : public SlotAssignment {
> private:
> void hostChildElementDidChange(const Element&, ShadowRoot&) override;
>- const AtomicString& slotNameForHostChild(const Node&) const override;
>+ const AtomString& slotNameForHostChild(const Node&) const override;
> };
> 
> void DetailsSlotAssignment::hostChildElementDidChange(const Element& childElement, ShadowRoot& shadowRoot)
>@@ -71,7 +71,7 @@ void DetailsSlotAssignment::hostChildElementDidChange(const Element& childElemen
> didChangeSlot(SlotAssignment::defaultSlotName(), shadowRoot);
> }
> 
>-const AtomicString& DetailsSlotAssignment::slotNameForHostChild(const Node& child) const
>+const AtomString& DetailsSlotAssignment::slotNameForHostChild(const Node& child) const
> {
> auto& parent = *child.parentNode();
> ASSERT(is<HTMLDetailsElement>(parent));
>@@ -145,7 +145,7 @@ void HTMLDetailsElement::dispatchPendingEvent(DetailEventSender* eventSender)
> dispatchEvent(Event::create(eventNames().toggleEvent, Event::CanBubble::No, Event::IsCancelable::No));
> }
> 
>-void HTMLDetailsElement::parseAttribute(const QualifiedName& name, const AtomicString& value)
>+void HTMLDetailsElement::parseAttribute(const QualifiedName& name, const AtomString& value)
> {
> if (name == openAttr) {
> bool oldValue = m_isOpen;
>diff --git a/Source/WebCore/html/HTMLDetailsElement.h b/Source/WebCore/html/HTMLDetailsElement.h
>index fd1450e086fdc73f5899849c1bb57ca7688d8885..7b78eb18b2aed911eb610dbdd318e74c5e15a8e9 100644
>--- a/Source/WebCore/html/HTMLDetailsElement.h
>+++ b/Source/WebCore/html/HTMLDetailsElement.h
>@@ -47,7 +47,7 @@ private:
> HTMLDetailsElement(const QualifiedName&, Document&);
> 
> RenderPtr<RenderElement> createElementRenderer(RenderStyle&&, const RenderTreePosition&) final;
>- void parseAttribute(const QualifiedName&, const AtomicString&) final;
>+ void parseAttribute(const QualifiedName&, const AtomString&) final;
> 
> void didAddUserAgentShadowRoot(ShadowRoot&) final;
> bool hasCustomFocusLogic() const final { return true; }
>diff --git a/Source/WebCore/html/HTMLDivElement.cpp b/Source/WebCore/html/HTMLDivElement.cpp
>index 8345099f8b1260efa7bcce5733f1bb9b3b2ce0c9..d89e789c38eb522e4c6c2601a36546d2680d1876 100644
>--- a/Source/WebCore/html/HTMLDivElement.cpp
>+++ b/Source/WebCore/html/HTMLDivElement.cpp
>@@ -50,7 +50,7 @@ Ref<HTMLDivElement> HTMLDivElement::create(const QualifiedName& tagName, Documen
> return adoptRef(*new HTMLDivElement(tagName, document));
> }
> 
>-void HTMLDivElement::collectStyleForPresentationAttribute(const QualifiedName& name, const AtomicString& value, MutableStyleProperties& style)
>+void HTMLDivElement::collectStyleForPresentationAttribute(const QualifiedName& name, const AtomString& value, MutableStyleProperties& style)
> {
> if (name == alignAttr) {
> if (equalLettersIgnoringASCIICase(value, "middle") || equalLettersIgnoringASCIICase(value, "center"))
>diff --git a/Source/WebCore/html/HTMLDivElement.h b/Source/WebCore/html/HTMLDivElement.h
>index 513acfab71a46fe3ba5c509f898493514a440124..a27cb10fdc22d5a9bb786f1fa20c6926fd49bc75 100644
>--- a/Source/WebCore/html/HTMLDivElement.h
>+++ b/Source/WebCore/html/HTMLDivElement.h
>@@ -36,7 +36,7 @@ protected:
> HTMLDivElement(const QualifiedName&, Document&);
> 
> private:
>- void collectStyleForPresentationAttribute(const QualifiedName&, const AtomicString&, MutableStyleProperties&) final;
>+ void collectStyleForPresentationAttribute(const QualifiedName&, const AtomString&, MutableStyleProperties&) final;
> };
> 
> } // namespace WebCore
>diff --git a/Source/WebCore/html/HTMLDocument.cpp b/Source/WebCore/html/HTMLDocument.cpp
>index 0c7d39003831da4b29e77f641910b4d81bd1dc80..0411410a74dca69ef49c8b16e286966695d5e306 100644
>--- a/Source/WebCore/html/HTMLDocument.cpp
>+++ b/Source/WebCore/html/HTMLDocument.cpp
>@@ -115,7 +115,7 @@ Ref<DocumentParser> HTMLDocument::createParser()
> }
> 
> // https://html.spec.whatwg.org/multipage/dom.html#dom-document-nameditem
>-Optional<Variant<RefPtr<WindowProxy>, RefPtr<Element>, RefPtr<HTMLCollection>>> HTMLDocument::namedItem(const AtomicString& name)
>+Optional<Variant<RefPtr<WindowProxy>, RefPtr<Element>, RefPtr<HTMLCollection>>> HTMLDocument::namedItem(const AtomString& name)
> {
> if (name.isNull() || !hasDocumentNamedItem(*name.impl()))
> return WTF::nullopt;
>@@ -135,7 +135,7 @@ Optional<Variant<RefPtr<WindowProxy>, RefPtr<Element>, RefPtr<HTMLCollection>>>
> return Variant<RefPtr<WindowProxy>, RefPtr<Element>, RefPtr<HTMLCollection>> { RefPtr<Element> { &element } };
> }
> 
>-Vector<AtomicString> HTMLDocument::supportedPropertyNames() const
>+Vector<AtomString> HTMLDocument::supportedPropertyNames() const
> {
> // https://html.spec.whatwg.org/multipage/dom.html#dom-document-namedItem-which
> //
>@@ -155,23 +155,23 @@ Vector<AtomicString> HTMLDocument::supportedPropertyNames() const
> return { };
> }
> 
>-void HTMLDocument::addDocumentNamedItem(const AtomicStringImpl& name, Element& item)
>+void HTMLDocument::addDocumentNamedItem(const AtomStringImpl& name, Element& item)
> {
> m_documentNamedItem.add(name, item, *this);
>- addImpureProperty(AtomicString(const_cast<AtomicStringImpl*>(&name)));
>+ addImpureProperty(AtomString(const_cast<AtomStringImpl*>(&name)));
> }
> 
>-void HTMLDocument::removeDocumentNamedItem(const AtomicStringImpl& name, Element& item)
>+void HTMLDocument::removeDocumentNamedItem(const AtomStringImpl& name, Element& item)
> {
> m_documentNamedItem.remove(name, item);
> }
> 
>-void HTMLDocument::addWindowNamedItem(const AtomicStringImpl& name, Element& item)
>+void HTMLDocument::addWindowNamedItem(const AtomStringImpl& name, Element& item)
> {
> m_windowNamedItem.add(name, item, *this);
> }
> 
>-void HTMLDocument::removeWindowNamedItem(const AtomicStringImpl& name, Element& item)
>+void HTMLDocument::removeWindowNamedItem(const AtomStringImpl& name, Element& item)
> {
> m_windowNamedItem.remove(name, item);
> }
>@@ -228,7 +228,7 @@ bool HTMLDocument::isCaseSensitiveAttribute(const QualifiedName& attributeName)
> &valuetypeAttr.get(),
> &vlinkAttr.get(),
> };
>- HashSet<AtomicString> set;
>+ HashSet<AtomString> set;
> for (auto* name : names)
> set.add(name->localName());
> return set;
>diff --git a/Source/WebCore/html/HTMLDocument.h b/Source/WebCore/html/HTMLDocument.h
>index 502b2233616cb3cb750777b3c95348fef69c3b1e..ab987beac3e7f934e2e9f3c21afe309e32083228 100644
>--- a/Source/WebCore/html/HTMLDocument.h
>+++ b/Source/WebCore/html/HTMLDocument.h
>@@ -36,20 +36,20 @@ public:
> WEBCORE_EXPORT int width();
> WEBCORE_EXPORT int height();
> 
>- Optional<Variant<RefPtr<WindowProxy>, RefPtr<Element>, RefPtr<HTMLCollection>>> namedItem(const AtomicString&);
>- Vector<AtomicString> supportedPropertyNames() const;
>+ Optional<Variant<RefPtr<WindowProxy>, RefPtr<Element>, RefPtr<HTMLCollection>>> namedItem(const AtomString&);
>+ Vector<AtomString> supportedPropertyNames() const;
> 
>- Element* documentNamedItem(const AtomicStringImpl& name) const { return m_documentNamedItem.getElementByDocumentNamedItem(name, *this); }
>- bool hasDocumentNamedItem(const AtomicStringImpl& name) const { return m_documentNamedItem.contains(name); }
>- bool documentNamedItemContainsMultipleElements(const AtomicStringImpl& name) const { return m_documentNamedItem.containsMultiple(name); }
>- void addDocumentNamedItem(const AtomicStringImpl&, Element&);
>- void removeDocumentNamedItem(const AtomicStringImpl&, Element&);
>+ Element* documentNamedItem(const AtomStringImpl& name) const { return m_documentNamedItem.getElementByDocumentNamedItem(name, *this); }
>+ bool hasDocumentNamedItem(const AtomStringImpl& name) const { return m_documentNamedItem.contains(name); }
>+ bool documentNamedItemContainsMultipleElements(const AtomStringImpl& name) const { return m_documentNamedItem.containsMultiple(name); }
>+ void addDocumentNamedItem(const AtomStringImpl&, Element&);
>+ void removeDocumentNamedItem(const AtomStringImpl&, Element&);
> 
>- Element* windowNamedItem(const AtomicStringImpl& name) const { return m_windowNamedItem.getElementByWindowNamedItem(name, *this); }
>- bool hasWindowNamedItem(const AtomicStringImpl& name) const { return m_windowNamedItem.contains(name); }
>- bool windowNamedItemContainsMultipleElements(const AtomicStringImpl& name) const { return m_windowNamedItem.containsMultiple(name); }
>- void addWindowNamedItem(const AtomicStringImpl&, Element&);
>- void removeWindowNamedItem(const AtomicStringImpl&, Element&);
>+ Element* windowNamedItem(const AtomStringImpl& name) const { return m_windowNamedItem.getElementByWindowNamedItem(name, *this); }
>+ bool hasWindowNamedItem(const AtomStringImpl& name) const { return m_windowNamedItem.contains(name); }
>+ bool windowNamedItemContainsMultipleElements(const AtomStringImpl& name) const { return m_windowNamedItem.containsMultiple(name); }
>+ void addWindowNamedItem(const AtomStringImpl&, Element&);
>+ void removeWindowNamedItem(const AtomStringImpl&, Element&);
> 
> static bool isCaseSensitiveAttribute(const QualifiedName&);
> 
>diff --git a/Source/WebCore/html/HTMLElement.cpp b/Source/WebCore/html/HTMLElement.cpp
>index e3ee808cf3ee0d1ee1ecf0f7723e66220cc1e163..82c22d419dd876fb0c8842a38dc9a446f1394842 100644
>--- a/Source/WebCore/html/HTMLElement.cpp
>+++ b/Source/WebCore/html/HTMLElement.cpp
>@@ -84,7 +84,7 @@ Ref<HTMLElement> HTMLElement::create(const QualifiedName& tagName, Document& doc
> 
> String HTMLElement::nodeName() const
> {
>- // FIXME: Would be nice to have an AtomicString lookup based off uppercase
>+ // FIXME: Would be nice to have an AtomString lookup based off uppercase
> // ASCII characters that does not have to copy the string on a hit in the hash.
> if (document().isHTMLDocument()) {
> if (LIKELY(!tagQName().hasPrefix()))
>@@ -103,7 +103,7 @@ static inline CSSValueID unicodeBidiAttributeForDirAuto(HTMLElement& element)
> return CSSValueIsolate;
> }
> 
>-unsigned HTMLElement::parseBorderWidthAttribute(const AtomicString& value) const
>+unsigned HTMLElement::parseBorderWidthAttribute(const AtomString& value) const
> {
> if (auto optionalBorderWidth = parseHTMLNonNegativeInteger(value))
> return optionalBorderWidth.value();
>@@ -111,13 +111,13 @@ unsigned HTMLElement::parseBorderWidthAttribute(const AtomicString& value) const
> return hasTagName(tableTag) ? 1 : 0;
> }
> 
>-void HTMLElement::applyBorderAttributeToStyle(const AtomicString& value, MutableStyleProperties& style)
>+void HTMLElement::applyBorderAttributeToStyle(const AtomString& value, MutableStyleProperties& style)
> {
> addPropertyToPresentationAttributeStyle(style, CSSPropertyBorderWidth, parseBorderWidthAttribute(value), CSSPrimitiveValue::CSS_PX);
> addPropertyToPresentationAttributeStyle(style, CSSPropertyBorderStyle, CSSValueSolid);
> }
> 
>-void HTMLElement::mapLanguageAttributeToLocale(const AtomicString& value, MutableStyleProperties& style)
>+void HTMLElement::mapLanguageAttributeToLocale(const AtomString& value, MutableStyleProperties& style)
> {
> if (!value.isEmpty()) {
> // Have to quote so the locale id is treated as a string instead of as a CSS keyword.
>@@ -135,7 +135,7 @@ bool HTMLElement::isPresentationAttribute(const QualifiedName& name) const
> return StyledElement::isPresentationAttribute(name);
> }
> 
>-static bool isLTROrRTLIgnoringCase(const AtomicString& dirAttributeValue)
>+static bool isLTROrRTLIgnoringCase(const AtomString& dirAttributeValue)
> {
> return equalLettersIgnoringASCIICase(dirAttributeValue, "rtl") || equalLettersIgnoringASCIICase(dirAttributeValue, "ltr");
> }
>@@ -147,7 +147,7 @@ enum class ContentEditableType {
> PlaintextOnly
> };
> 
>-static inline ContentEditableType contentEditableType(const AtomicString& value)
>+static inline ContentEditableType contentEditableType(const AtomString& value)
> {
> if (value.isNull())
> return ContentEditableType::Inherit;
>@@ -166,7 +166,7 @@ static ContentEditableType contentEditableType(const HTMLElement& element)
> return contentEditableType(element.attributeWithoutSynchronization(contenteditableAttr));
> }
> 
>-void HTMLElement::collectStyleForPresentationAttribute(const QualifiedName& name, const AtomicString& value, MutableStyleProperties& style)
>+void HTMLElement::collectStyleForPresentationAttribute(const QualifiedName& name, const AtomString& value, MutableStyleProperties& style)
> {
> if (name == alignAttr) {
> if (equalLettersIgnoringASCIICase(value, "middle"))
>@@ -347,7 +347,7 @@ HTMLElement::EventHandlerNameMap HTMLElement::createEventHandlerNameMap()
> 
> struct UnusualMapping {
> const QualifiedName& attributeName;
>- const AtomicString& eventName;
>+ const AtomString& eventName;
> };
> 
> const UnusualMapping unusualPairsTable[] = {
>@@ -374,13 +374,13 @@ void HTMLElement::populateEventHandlerNameMap(EventHandlerNameMap& map, const Qu
> 
> // Remove the "on" prefix. Requires some memory allocation and computing a hash, but by not
> // using pointers from eventNames(), the passed-in table can be initialized at compile time.
>- AtomicString eventName = attributeName.string().substring(2);
>+ AtomString eventName = attributeName.string().substring(2);
> 
> map.add(attributeName.impl(), WTFMove(eventName));
> }
> }
> 
>-const AtomicString& HTMLElement::eventNameForEventHandlerAttribute(const QualifiedName& attributeName, const EventHandlerNameMap& map)
>+const AtomString& HTMLElement::eventNameForEventHandlerAttribute(const QualifiedName& attributeName, const EventHandlerNameMap& map)
> {
> ASSERT(!attributeName.localName().isNull());
> 
>@@ -389,7 +389,7 @@ const AtomicString& HTMLElement::eventNameForEventHandlerAttribute(const Qualifi
> return nullAtom();
> 
> // Fast early return for names that don't start with "on".
>- AtomicStringImpl& localName = *attributeName.localName().impl();
>+ AtomStringImpl& localName = *attributeName.localName().impl();
> if (localName.length() < 3 || localName[0] != 'o' || localName[1] != 'n')
> return nullAtom();
> 
>@@ -397,7 +397,7 @@ const AtomicString& HTMLElement::eventNameForEventHandlerAttribute(const Qualifi
> return it == map.end() ? nullAtom() : it->value;
> }
> 
>-const AtomicString& HTMLElement::eventNameForEventHandlerAttribute(const QualifiedName& attributeName)
>+const AtomString& HTMLElement::eventNameForEventHandlerAttribute(const QualifiedName& attributeName)
> {
> static NeverDestroyed<EventHandlerNameMap> map = createEventHandlerNameMap();
> return eventNameForEventHandlerAttribute(attributeName, map.get());
>@@ -436,7 +436,7 @@ bool HTMLElement::matchesReadWritePseudoClass() const
> return editabilityFromContentEditableAttr(*this) != Editability::ReadOnly;
> }
> 
>-void HTMLElement::parseAttribute(const QualifiedName& name, const AtomicString& value)
>+void HTMLElement::parseAttribute(const QualifiedName& name, const AtomString& value)
> {
> if (name == dirAttr) {
> dirAttributeChanged(value);
>@@ -503,11 +503,11 @@ static Ref<DocumentFragment> textToFragment(Document& document, const String& te
> // or the empty string if the attribute is in a state that has no associated keyword value or if the attribute is
> // not in a defined state (e.g. the attribute is missing and there is no missing value default).
> // http://www.whatwg.org/specs/web-apps/current-work/multipage/common-dom-interfaces.html#limited-to-only-known-values
>-static inline const AtomicString& toValidDirValue(const AtomicString& value)
>+static inline const AtomString& toValidDirValue(const AtomString& value)
> {
>- static NeverDestroyed<AtomicString> ltrValue("ltr", AtomicString::ConstructFromLiteral);
>- static NeverDestroyed<AtomicString> rtlValue("rtl", AtomicString::ConstructFromLiteral);
>- static NeverDestroyed<AtomicString> autoValue("auto", AtomicString::ConstructFromLiteral);
>+ static NeverDestroyed<AtomString> ltrValue("ltr", AtomString::ConstructFromLiteral);
>+ static NeverDestroyed<AtomString> rtlValue("rtl", AtomString::ConstructFromLiteral);
>+ static NeverDestroyed<AtomString> autoValue("auto", AtomString::ConstructFromLiteral);
> if (equalLettersIgnoringASCIICase(value, "ltr"))
> return ltrValue;
> if (equalLettersIgnoringASCIICase(value, "rtl"))
>@@ -517,12 +517,12 @@ static inline const AtomicString& toValidDirValue(const AtomicString& value)
> return nullAtom();
> }
> 
>-const AtomicString& HTMLElement::dir() const
>+const AtomString& HTMLElement::dir() const
> {
> return toValidDirValue(attributeWithoutSynchronization(dirAttr));
> }
> 
>-void HTMLElement::setDir(const AtomicString& value)
>+void HTMLElement::setDir(const AtomString& value)
> {
> setAttributeWithoutSynchronization(dirAttr, value);
> }
>@@ -600,7 +600,7 @@ ExceptionOr<void> HTMLElement::setOuterText(const String& text)
> return { };
> }
> 
>-void HTMLElement::applyAlignmentAttributeToStyle(const AtomicString& alignment, MutableStyleProperties& style)
>+void HTMLElement::applyAlignmentAttributeToStyle(const AtomString& alignment, MutableStyleProperties& style)
> {
> // Vertical alignment with respect to the current baseline of the text
> // right or left means floating images.
>@@ -663,11 +663,11 @@ String HTMLElement::contentEditable() const
> ExceptionOr<void> HTMLElement::setContentEditable(const String& enabled)
> {
> if (equalLettersIgnoringASCIICase(enabled, "true"))
>- setAttributeWithoutSynchronization(contenteditableAttr, AtomicString("true", AtomicString::ConstructFromLiteral));
>+ setAttributeWithoutSynchronization(contenteditableAttr, AtomString("true", AtomString::ConstructFromLiteral));
> else if (equalLettersIgnoringASCIICase(enabled, "false"))
>- setAttributeWithoutSynchronization(contenteditableAttr, AtomicString("false", AtomicString::ConstructFromLiteral));
>+ setAttributeWithoutSynchronization(contenteditableAttr, AtomString("false", AtomString::ConstructFromLiteral));
> else if (equalLettersIgnoringASCIICase(enabled, "plaintext-only"))
>- setAttributeWithoutSynchronization(contenteditableAttr, AtomicString("plaintext-only", AtomicString::ConstructFromLiteral));
>+ setAttributeWithoutSynchronization(contenteditableAttr, AtomString("plaintext-only", AtomString::ConstructFromLiteral));
> else if (equalLettersIgnoringASCIICase(enabled, "inherit"))
> removeAttribute(contenteditableAttr);
> else
>@@ -683,8 +683,8 @@ bool HTMLElement::draggable() const
> void HTMLElement::setDraggable(bool value)
> {
> setAttributeWithoutSynchronization(draggableAttr, value
>- ? AtomicString("true", AtomicString::ConstructFromLiteral)
>- : AtomicString("false", AtomicString::ConstructFromLiteral));
>+ ? AtomString("true", AtomString::ConstructFromLiteral)
>+ : AtomString("false", AtomString::ConstructFromLiteral));
> }
> 
> bool HTMLElement::spellcheck() const
>@@ -695,8 +695,8 @@ bool HTMLElement::spellcheck() const
> void HTMLElement::setSpellcheck(bool enable)
> {
> setAttributeWithoutSynchronization(spellcheckAttr, enable
>- ? AtomicString("true", AtomicString::ConstructFromLiteral)
>- : AtomicString("false", AtomicString::ConstructFromLiteral));
>+ ? AtomString("true", AtomString::ConstructFromLiteral)
>+ : AtomString("false", AtomString::ConstructFromLiteral));
> }
> 
> void HTMLElement::click()
>@@ -724,7 +724,7 @@ int HTMLElement::tabIndex() const
> bool HTMLElement::translate() const
> {
> for (auto& element : lineageOfType<HTMLElement>(*this)) {
>- const AtomicString& value = element.attributeWithoutSynchronization(translateAttr);
>+ const AtomString& value = element.attributeWithoutSynchronization(translateAttr);
> if (equalLettersIgnoringASCIICase(value, "yes") || (value.isEmpty() && !value.isNull()))
> return true;
> if (equalLettersIgnoringASCIICase(value, "no"))
>@@ -812,7 +812,7 @@ void HTMLElement::childrenChanged(const ChildChange& change)
> 
> bool HTMLElement::hasDirectionAuto() const
> {
>- const AtomicString& direction = attributeWithoutSynchronization(dirAttr);
>+ const AtomString& direction = attributeWithoutSynchronization(dirAttr);
> return (hasTagName(bdiTag) && direction.isNull()) || equalLettersIgnoringASCIICase(direction, "auto");
> }
> 
>@@ -872,7 +872,7 @@ TextDirection HTMLElement::directionality(Node** strongDirectionalityTextNode) c
> return TextDirection::LTR;
> }
> 
>-void HTMLElement::dirAttributeChanged(const AtomicString& value)
>+void HTMLElement::dirAttributeChanged(const AtomString& value)
> {
> RefPtr<Element> parent = parentElement();
> 
>@@ -1077,7 +1077,7 @@ bool HTMLElement::isActuallyDisabled() const
> 
> #if ENABLE(IOS_AUTOCORRECT_AND_AUTOCAPITALIZE)
> 
>-const AtomicString& HTMLElement::autocapitalize() const
>+const AtomString& HTMLElement::autocapitalize() const
> {
> return stringForAutocapitalizeType(autocapitalizeType());
> }
>@@ -1087,7 +1087,7 @@ AutocapitalizeType HTMLElement::autocapitalizeType() const
> return autocapitalizeTypeForAttributeValue(attributeWithoutSynchronization(HTMLNames::autocapitalizeAttr));
> }
> 
>-void HTMLElement::setAutocapitalize(const AtomicString& value)
>+void HTMLElement::setAutocapitalize(const AtomString& value)
> {
> setAttributeWithoutSynchronization(autocapitalizeAttr, value);
> }
>@@ -1101,7 +1101,7 @@ bool HTMLElement::shouldAutocorrect() const
> 
> void HTMLElement::setAutocorrect(bool autocorrect)
> {
>- setAttributeWithoutSynchronization(autocorrectAttr, autocorrect ? AtomicString("on", AtomicString::ConstructFromLiteral) : AtomicString("off", AtomicString::ConstructFromLiteral));
>+ setAttributeWithoutSynchronization(autocorrectAttr, autocorrect ? AtomString("on", AtomString::ConstructFromLiteral) : AtomString("off", AtomString::ConstructFromLiteral));
> }
> 
> #endif
>@@ -1116,12 +1116,12 @@ InputMode HTMLElement::canonicalInputMode() const
> return mode;
> }
> 
>-const AtomicString& HTMLElement::inputMode() const
>+const AtomString& HTMLElement::inputMode() const
> {
> return stringForInputMode(canonicalInputMode());
> }
> 
>-void HTMLElement::setInputMode(const AtomicString& value)
>+void HTMLElement::setInputMode(const AtomString& value)
> {
> setAttributeWithoutSynchronization(inputmodeAttr, value);
> }
>diff --git a/Source/WebCore/html/HTMLElement.h b/Source/WebCore/html/HTMLElement.h
>index b3b923f59a97d448ac13e637e051a4dbb35f23cc..67bf6a6abee35a9fe5cd36a5bfdbe34e9dcfa106 100644
>--- a/Source/WebCore/html/HTMLElement.h
>+++ b/Source/WebCore/html/HTMLElement.h
>@@ -75,8 +75,8 @@ public:
> 
> WEBCORE_EXPORT virtual HTMLFormElement* form() const;
> 
>- WEBCORE_EXPORT const AtomicString& dir() const;
>- WEBCORE_EXPORT void setDir(const AtomicString&);
>+ WEBCORE_EXPORT const AtomString& dir() const;
>+ WEBCORE_EXPORT void setDir(const AtomString&);
> 
> bool hasDirectionAuto() const;
> TextDirection directionalityIfhasDirAutoAttribute(bool& isAuto) const;
>@@ -94,7 +94,7 @@ public:
> 
> bool hasTagName(const HTMLQualifiedName& name) const { return hasLocalName(name.localName()); }
> 
>- static const AtomicString& eventNameForEventHandlerAttribute(const QualifiedName& attributeName);
>+ static const AtomString& eventNameForEventHandlerAttribute(const QualifiedName& attributeName);
> 
> // Only some element types can be disabled: https://html.spec.whatwg.org/multipage/scripting.html#concept-element-disabled
> bool canBeActuallyDisabled() const;
>@@ -102,8 +102,8 @@ public:
> 
> #if ENABLE(IOS_AUTOCORRECT_AND_AUTOCAPITALIZE)
> WEBCORE_EXPORT virtual AutocapitalizeType autocapitalizeType() const;
>- WEBCORE_EXPORT const AtomicString& autocapitalize() const;
>- WEBCORE_EXPORT void setAutocapitalize(const AtomicString& value);
>+ WEBCORE_EXPORT const AtomString& autocapitalize() const;
>+ WEBCORE_EXPORT void setAutocapitalize(const AtomString& value);
> 
> bool autocorrect() const { return shouldAutocorrect(); }
> WEBCORE_EXPORT virtual bool shouldAutocorrect() const;
>@@ -111,8 +111,8 @@ public:
> #endif
> 
> WEBCORE_EXPORT InputMode canonicalInputMode() const;
>- const AtomicString& inputMode() const;
>- void setInputMode(const AtomicString& value);
>+ const AtomString& inputMode() const;
>+ void setInputMode(const AtomString& value);
> 
> protected:
> HTMLElement(const QualifiedName& tagName, Document&, ConstructionType);
>@@ -120,28 +120,28 @@ protected:
> void addHTMLLengthToStyle(MutableStyleProperties&, CSSPropertyID, const String& value);
> void addHTMLColorToStyle(MutableStyleProperties&, CSSPropertyID, const String& color);
> 
>- void applyAlignmentAttributeToStyle(const AtomicString&, MutableStyleProperties&);
>- void applyBorderAttributeToStyle(const AtomicString&, MutableStyleProperties&);
>+ void applyAlignmentAttributeToStyle(const AtomString&, MutableStyleProperties&);
>+ void applyBorderAttributeToStyle(const AtomString&, MutableStyleProperties&);
> 
> bool matchesReadWritePseudoClass() const override;
>- void parseAttribute(const QualifiedName&, const AtomicString&) override;
>+ void parseAttribute(const QualifiedName&, const AtomString&) override;
> bool isPresentationAttribute(const QualifiedName&) const override;
>- void collectStyleForPresentationAttribute(const QualifiedName&, const AtomicString&, MutableStyleProperties&) override;
>- unsigned parseBorderWidthAttribute(const AtomicString&) const;
>+ void collectStyleForPresentationAttribute(const QualifiedName&, const AtomString&, MutableStyleProperties&) override;
>+ unsigned parseBorderWidthAttribute(const AtomString&) const;
> 
> void childrenChanged(const ChildChange&) override;
> void calculateAndAdjustDirectionality();
> 
>- typedef HashMap<AtomicStringImpl*, AtomicString> EventHandlerNameMap;
>+ typedef HashMap<AtomStringImpl*, AtomString> EventHandlerNameMap;
> template<size_t tableSize> static void populateEventHandlerNameMap(EventHandlerNameMap&, const QualifiedName* const (&table)[tableSize]);
>- static const AtomicString& eventNameForEventHandlerAttribute(const QualifiedName& attributeName, const EventHandlerNameMap&);
>+ static const AtomString& eventNameForEventHandlerAttribute(const QualifiedName& attributeName, const EventHandlerNameMap&);
> 
> private:
> String nodeName() const final;
> 
>- void mapLanguageAttributeToLocale(const AtomicString&, MutableStyleProperties&);
>+ void mapLanguageAttributeToLocale(const AtomString&, MutableStyleProperties&);
> 
>- void dirAttributeChanged(const AtomicString&);
>+ void dirAttributeChanged(const AtomString&);
> void adjustDirectionalityIfNeededAfterChildAttributeChanged(Element* child);
> void adjustDirectionalityIfNeededAfterChildrenChanged(Element* beforeChange, ChildChangeType);
> TextDirection directionality(Node** strongDirectionalityTextNode= 0) const;
>diff --git a/Source/WebCore/html/HTMLEmbedElement.cpp b/Source/WebCore/html/HTMLEmbedElement.cpp
>index c7d7b00d12502b1fd639b5560d7fa4b6d761cf45..aac407be2a2426a08bd247e6e759a0f826f97852 100644
>--- a/Source/WebCore/html/HTMLEmbedElement.cpp
>+++ b/Source/WebCore/html/HTMLEmbedElement.cpp
>@@ -90,7 +90,7 @@ RenderWidget* HTMLEmbedElement::renderWidgetLoadingPlugin() const
> return findWidgetRenderer(this);
> }
> 
>-void HTMLEmbedElement::collectStyleForPresentationAttribute(const QualifiedName& name, const AtomicString& value, MutableStyleProperties& style)
>+void HTMLEmbedElement::collectStyleForPresentationAttribute(const QualifiedName& name, const AtomString& value, MutableStyleProperties& style)
> {
> if (name == hiddenAttr) {
> if (equalLettersIgnoringASCIICase(value, "yes") || equalLettersIgnoringASCIICase(value, "true")) {
>@@ -106,7 +106,7 @@ static bool hasTypeOrSrc(const HTMLEmbedElement& embed)
> return embed.hasAttributeWithoutSynchronization(typeAttr) || embed.hasAttributeWithoutSynchronization(srcAttr);
> }
> 
>-void HTMLEmbedElement::parseAttribute(const QualifiedName& name, const AtomicString& value)
>+void HTMLEmbedElement::parseAttribute(const QualifiedName& name, const AtomString& value)
> {
> if (name == typeAttr) {
> m_serviceType = value.string().left(value.find(';')).convertToASCIILowercase();
>@@ -222,7 +222,7 @@ bool HTMLEmbedElement::isURLAttribute(const Attribute& attribute) const
> return attribute.name() == srcAttr || HTMLPlugInImageElement::isURLAttribute(attribute);
> }
> 
>-const AtomicString& HTMLEmbedElement::imageSourceURL() const
>+const AtomString& HTMLEmbedElement::imageSourceURL() const
> {
> return attributeWithoutSynchronization(srcAttr);
> }
>diff --git a/Source/WebCore/html/HTMLEmbedElement.h b/Source/WebCore/html/HTMLEmbedElement.h
>index 8124aefcd01e69dadf037b195c8981c22513c8ae..4515705899be01a4a15a3b9d63394ab4464bea58 100644
>--- a/Source/WebCore/html/HTMLEmbedElement.h
>+++ b/Source/WebCore/html/HTMLEmbedElement.h
>@@ -35,13 +35,13 @@ public:
> private:
> HTMLEmbedElement(const QualifiedName&, Document&);
> 
>- void parseAttribute(const QualifiedName&, const AtomicString&) final;
>- void collectStyleForPresentationAttribute(const QualifiedName&, const AtomicString&, MutableStyleProperties&) final;
>+ void parseAttribute(const QualifiedName&, const AtomString&) final;
>+ void collectStyleForPresentationAttribute(const QualifiedName&, const AtomString&, MutableStyleProperties&) final;
> 
> bool rendererIsNeeded(const RenderStyle&) final;
> 
> bool isURLAttribute(const Attribute&) const final;
>- const AtomicString& imageSourceURL() const final;
>+ const AtomString& imageSourceURL() const final;
> 
> RenderWidget* renderWidgetLoadingPlugin() const final;
> 
>diff --git a/Source/WebCore/html/HTMLFieldSetElement.cpp b/Source/WebCore/html/HTMLFieldSetElement.cpp
>index 410170af825df98dd860a881385ff1a9f53de79b..51ab0187980487b3afd4e535e6afc5cae0d27fe2 100644
>--- a/Source/WebCore/html/HTMLFieldSetElement.cpp
>+++ b/Source/WebCore/html/HTMLFieldSetElement.cpp
>@@ -152,9 +152,9 @@ bool HTMLFieldSetElement::supportsFocus() const
> return HTMLElement::supportsFocus();
> }
> 
>-const AtomicString& HTMLFieldSetElement::formControlType() const
>+const AtomString& HTMLFieldSetElement::formControlType() const
> {
>- static NeverDestroyed<const AtomicString> fieldset("fieldset", AtomicString::ConstructFromLiteral);
>+ static NeverDestroyed<const AtomString> fieldset("fieldset", AtomString::ConstructFromLiteral);
> return fieldset;
> }
> 
>diff --git a/Source/WebCore/html/HTMLFieldSetElement.h b/Source/WebCore/html/HTMLFieldSetElement.h
>index d107b976b3f2a18ac48e23748084d73770bba36d..b0594ce94b4816c7f43853702afef9e83a6d01e2 100644
>--- a/Source/WebCore/html/HTMLFieldSetElement.h
>+++ b/Source/WebCore/html/HTMLFieldSetElement.h
>@@ -50,7 +50,7 @@ private:
> bool isEnumeratable() const final { return true; }
> bool supportsFocus() const final;
> RenderPtr<RenderElement> createElementRenderer(RenderStyle&&, const RenderTreePosition&) final;
>- const AtomicString& formControlType() const final;
>+ const AtomString& formControlType() const final;
> bool computeWillValidate() const final { return false; }
> void disabledAttributeChanged() final;
> void disabledStateChanged() final;
>diff --git a/Source/WebCore/html/HTMLFontElement.cpp b/Source/WebCore/html/HTMLFontElement.cpp
>index 3cab734e1393a0e4c662b2f4861e25d3ae9ddfe4..b1a6fd782d71d8d85be39fef6a750e8e32a53087 100644
>--- a/Source/WebCore/html/HTMLFontElement.cpp
>+++ b/Source/WebCore/html/HTMLFontElement.cpp
>@@ -186,7 +186,7 @@ bool HTMLFontElement::isPresentationAttribute(const QualifiedName& name) const
> return HTMLElement::isPresentationAttribute(name);
> }
> 
>-void HTMLFontElement::collectStyleForPresentationAttribute(const QualifiedName& name, const AtomicString& value, MutableStyleProperties& style)
>+void HTMLFontElement::collectStyleForPresentationAttribute(const QualifiedName& name, const AtomString& value, MutableStyleProperties& style)
> {
> if (name == sizeAttr) {
> CSSValueID size = CSSValueInvalid;
>diff --git a/Source/WebCore/html/HTMLFontElement.h b/Source/WebCore/html/HTMLFontElement.h
>index a204871acf13a13812332d358ffc020ad36ab058..c981afb787def74e7a1baa302b5bc1a13da3fb7e 100644
>--- a/Source/WebCore/html/HTMLFontElement.h
>+++ b/Source/WebCore/html/HTMLFontElement.h
>@@ -38,7 +38,7 @@ private:
> HTMLFontElement(const QualifiedName&, Document&);
> 
> bool isPresentationAttribute(const QualifiedName&) const final;
>- void collectStyleForPresentationAttribute(const QualifiedName&, const AtomicString&, MutableStyleProperties&) final;
>+ void collectStyleForPresentationAttribute(const QualifiedName&, const AtomString&, MutableStyleProperties&) final;
> };
> 
> } // namespace WebCore
>diff --git a/Source/WebCore/html/HTMLFormControlElement.cpp b/Source/WebCore/html/HTMLFormControlElement.cpp
>index 0f762798ba86fb3c0473d831dbe3549708b3d584..43f3f48440efe0f0883756244306a78e75e3158a 100644
>--- a/Source/WebCore/html/HTMLFormControlElement.cpp
>+++ b/Source/WebCore/html/HTMLFormControlElement.cpp
>@@ -82,7 +82,7 @@ HTMLFormControlElement::~HTMLFormControlElement()
> 
> String HTMLFormControlElement::formEnctype() const
> {
>- const AtomicString& formEnctypeAttr = attributeWithoutSynchronization(formenctypeAttr);
>+ const AtomString& formEnctypeAttr = attributeWithoutSynchronization(formenctypeAttr);
> if (formEnctypeAttr.isNull())
> return emptyString();
> return FormSubmission::Attributes::parseEncodingType(formEnctypeAttr);
>@@ -113,13 +113,13 @@ bool HTMLFormControlElement::formNoValidate() const
> 
> String HTMLFormControlElement::formAction() const
> {
>- const AtomicString& value = attributeWithoutSynchronization(formactionAttr);
>+ const AtomString& value = attributeWithoutSynchronization(formactionAttr);
> if (value.isEmpty())
> return document().url();
> return getURLAttribute(formactionAttr);
> }
> 
>-void HTMLFormControlElement::setFormAction(const AtomicString& value)
>+void HTMLFormControlElement::setFormAction(const AtomString& value)
> {
> setAttributeWithoutSynchronization(formactionAttr, value);
> }
>@@ -147,7 +147,7 @@ void HTMLFormControlElement::setAncestorDisabled(bool isDisabled)
> disabledStateChanged();
> }
> 
>-void HTMLFormControlElement::parseAttribute(const QualifiedName& name, const AtomicString& value)
>+void HTMLFormControlElement::parseAttribute(const QualifiedName& name, const AtomString& value)
> {
> if (name == formAttr)
> formAttributeChanged();
>@@ -620,7 +620,7 @@ void HTMLFormControlElement::dispatchBlurEvent(RefPtr<Element>&& newFocusedEleme
> 
> bool HTMLFormControlElement::shouldAutocorrect() const
> {
>- const AtomicString& autocorrectValue = attributeWithoutSynchronization(autocorrectAttr);
>+ const AtomString& autocorrectValue = attributeWithoutSynchronization(autocorrectAttr);
> if (!autocorrectValue.isEmpty())
> return !equalLettersIgnoringASCIICase(autocorrectValue, "off");
> if (RefPtr<HTMLFormElement> form = this->form())
>diff --git a/Source/WebCore/html/HTMLFormControlElement.h b/Source/WebCore/html/HTMLFormControlElement.h
>index 45fdac217794a9a9659dc0638f8f5cca208a8d2c..a58ade3c6158af9fd6c14a1289e20e21bf033586 100644
>--- a/Source/WebCore/html/HTMLFormControlElement.h
>+++ b/Source/WebCore/html/HTMLFormControlElement.h
>@@ -55,7 +55,7 @@ public:
> WEBCORE_EXPORT void setFormMethod(const String&);
> bool formNoValidate() const;
> WEBCORE_EXPORT String formAction() const;
>- WEBCORE_EXPORT void setFormAction(const AtomicString&);
>+ WEBCORE_EXPORT void setFormAction(const AtomString&);
> 
> void setAncestorDisabled(bool isDisabled);
> 
>@@ -77,9 +77,9 @@ public:
> 
> bool isRequired() const;
> 
>- const AtomicString& type() const { return formControlType(); }
>+ const AtomString& type() const { return formControlType(); }
> 
>- virtual const AtomicString& formControlType() const = 0;
>+ virtual const AtomString& formControlType() const = 0;
> 
> virtual bool canTriggerImplicitSubmission() const { return false; }
> 
>@@ -130,7 +130,7 @@ protected:
> 
> bool disabledByAncestorFieldset() const { return m_disabledByAncestorFieldset; }
> 
>- void parseAttribute(const QualifiedName&, const AtomicString&) override;
>+ void parseAttribute(const QualifiedName&, const AtomString&) override;
> virtual void disabledAttributeChanged();
> virtual void disabledStateChanged();
> virtual void readOnlyStateChanged();
>diff --git a/Source/WebCore/html/HTMLFormControlsCollection.cpp b/Source/WebCore/html/HTMLFormControlsCollection.cpp
>index da020c607d39eddd443f8364609461183a6ac99b..6ec22d7749f2f78bd31ef77ea636073b71c59ff2 100644
>--- a/Source/WebCore/html/HTMLFormControlsCollection.cpp
>+++ b/Source/WebCore/html/HTMLFormControlsCollection.cpp
>@@ -121,19 +121,19 @@ void HTMLFormControlsCollection::updateNamedElementCache() const
> 
> auto cache = std::make_unique<CollectionNamedElementCache>();
> 
>- HashSet<AtomicStringImpl*> foundInputElements;
>+ HashSet<AtomStringImpl*> foundInputElements;
> 
> ScriptDisallowedScope::InMainThread scriptDisallowedScope;
> for (auto& elementPtr : unsafeFormControlElements()) {
> FormAssociatedElement& associatedElement = *elementPtr;
> if (associatedElement.isEnumeratable()) {
> HTMLElement& element = associatedElement.asHTMLElement();
>- const AtomicString& id = element.getIdAttribute();
>+ const AtomString& id = element.getIdAttribute();
> if (!id.isEmpty()) {
> cache->appendToIdCache(id, element);
> foundInputElements.add(id.impl());
> }
>- const AtomicString& name = element.getNameAttribute();
>+ const AtomString& name = element.getNameAttribute();
> if (!name.isEmpty() && id != name) {
> cache->appendToNameCache(name, element);
> foundInputElements.add(name.impl());
>@@ -145,10 +145,10 @@ void HTMLFormControlsCollection::updateNamedElementCache() const
> if (!elementPtr)
> continue;
> HTMLImageElement& element = *elementPtr;
>- const AtomicString& id = element.getIdAttribute();
>+ const AtomString& id = element.getIdAttribute();
> if (!id.isEmpty() && !foundInputElements.contains(id.impl()))
> cache->appendToIdCache(id, element);
>- const AtomicString& name = element.getNameAttribute();
>+ const AtomString& name = element.getNameAttribute();
> if (!name.isEmpty() && id != name && !foundInputElements.contains(name.impl()))
> cache->appendToNameCache(name, element);
> }
>diff --git a/Source/WebCore/html/HTMLFormElement.cpp b/Source/WebCore/html/HTMLFormElement.cpp
>index 48fc4eb3c5c30b906d3fffb5d6d7da4f43bc3f48..0962d968d9780ddd837827a7af5f3f92d033c156 100644
>--- a/Source/WebCore/html/HTMLFormElement.cpp
>+++ b/Source/WebCore/html/HTMLFormElement.cpp
>@@ -166,7 +166,7 @@ HTMLElement* HTMLFormElement::item(unsigned index)
> return elements()->item(index);
> }
> 
>-Optional<Variant<RefPtr<RadioNodeList>, RefPtr<Element>>> HTMLFormElement::namedItem(const AtomicString& name)
>+Optional<Variant<RefPtr<RadioNodeList>, RefPtr<Element>>> HTMLFormElement::namedItem(const AtomString& name)
> {
> auto namedItems = namedElements(name);
> 
>@@ -178,7 +178,7 @@ Optional<Variant<RefPtr<RadioNodeList>, RefPtr<Element>>> HTMLFormElement::named
> return Variant<RefPtr<RadioNodeList>, RefPtr<Element>> { RefPtr<RadioNodeList> { radioNodeList(name) } };
> }
> 
>-Vector<AtomicString> HTMLFormElement::supportedPropertyNames() const
>+Vector<AtomString> HTMLFormElement::supportedPropertyNames() const
> {
> // FIXME: Should be implemented (only needed for enumeration with includeDontEnumProperties mode
> // since this class is annotated with LegacyUnenumerableNamedProperties).
>@@ -408,7 +408,7 @@ void HTMLFormElement::resetAssociatedFormControlElements()
> 
> bool HTMLFormElement::shouldAutocorrect() const
> {
>- const AtomicString& autocorrectValue = attributeWithoutSynchronization(autocorrectAttr);
>+ const AtomString& autocorrectValue = attributeWithoutSynchronization(autocorrectAttr);
> if (!autocorrectValue.isEmpty())
> return !equalLettersIgnoringASCIICase(autocorrectValue, "off");
> if (RefPtr<HTMLFormElement> form = this->form())
>@@ -418,7 +418,7 @@ bool HTMLFormElement::shouldAutocorrect() const
> 
> #endif
> 
>-void HTMLFormElement::parseAttribute(const QualifiedName& name, const AtomicString& value)
>+void HTMLFormElement::parseAttribute(const QualifiedName& name, const AtomString& value)
> {
> if (name == actionAttr) {
> m_attributes.parseAction(value);
>@@ -774,7 +774,7 @@ inline void HTMLFormElement::assertItemCanBeInPastNamesMap(FormNamedItem*) const
> }
> #endif
> 
>-RefPtr<HTMLElement> HTMLFormElement::elementFromPastNamesMap(const AtomicString& pastName) const
>+RefPtr<HTMLElement> HTMLFormElement::elementFromPastNamesMap(const AtomString& pastName) const
> {
> if (pastName.isEmpty() || !m_pastNamesMap)
> return nullptr;
>@@ -785,7 +785,7 @@ RefPtr<HTMLElement> HTMLFormElement::elementFromPastNamesMap(const AtomicString&
> return &item->asHTMLElement();
> }
> 
>-void HTMLFormElement::addToPastNamesMap(FormNamedItem* item, const AtomicString& pastName)
>+void HTMLFormElement::addToPastNamesMap(FormNamedItem* item, const AtomString& pastName)
> {
> assertItemCanBeInPastNamesMap(item);
> if (pastName.isEmpty())
>@@ -818,7 +818,7 @@ bool HTMLFormElement::matchesInvalidPseudoClass() const
> }
> 
> // FIXME: Use Ref<HTMLElement> for the function result since there are no non-HTML elements returned here.
>-Vector<Ref<Element>> HTMLFormElement::namedElements(const AtomicString& name)
>+Vector<Ref<Element>> HTMLFormElement::namedElements(const AtomString& name)
> {
> // http://www.whatwg.org/specs/web-apps/current-work/multipage/forms.html#dom-form-nameditem
> Vector<Ref<Element>> namedItems = elements()->namedItems(name);
>@@ -886,15 +886,15 @@ HTMLFormElement* HTMLFormElement::findClosestFormAncestor(const Element& startEl
> return const_cast<HTMLFormElement*>(ancestorsOfType<HTMLFormElement>(startElement).first());
> }
> 
>-void HTMLFormElement::setAutocomplete(const AtomicString& value)
>+void HTMLFormElement::setAutocomplete(const AtomString& value)
> {
> setAttributeWithoutSynchronization(autocompleteAttr, value);
> }
> 
>-const AtomicString& HTMLFormElement::autocomplete() const
>+const AtomString& HTMLFormElement::autocomplete() const
> {
>- static NeverDestroyed<AtomicString> on("on", AtomicString::ConstructFromLiteral);
>- static NeverDestroyed<AtomicString> off("off", AtomicString::ConstructFromLiteral);
>+ static NeverDestroyed<AtomString> on("on", AtomString::ConstructFromLiteral);
>+ static NeverDestroyed<AtomString> off("off", AtomString::ConstructFromLiteral);
> 
> return equalIgnoringASCIICase(attributeWithoutSynchronization(autocompleteAttr), "off") ? off : on;
> }
>diff --git a/Source/WebCore/html/HTMLFormElement.h b/Source/WebCore/html/HTMLFormElement.h
>index 19b039a63da56f843ef00211f7d7956ba9383007..ebcdc0a66233e4ff6eb4c4370cde7d7aa2142a61 100644
>--- a/Source/WebCore/html/HTMLFormElement.h
>+++ b/Source/WebCore/html/HTMLFormElement.h
>@@ -52,20 +52,20 @@ public:
> 
> Ref<HTMLFormControlsCollection> elements();
> WEBCORE_EXPORT Ref<HTMLCollection> elementsForNativeBindings();
>- Vector<Ref<Element>> namedElements(const AtomicString&);
>+ Vector<Ref<Element>> namedElements(const AtomString&);
> 
> WEBCORE_EXPORT unsigned length() const;
> HTMLElement* item(unsigned index);
>- Optional<Variant<RefPtr<RadioNodeList>, RefPtr<Element>>> namedItem(const AtomicString&);
>- Vector<AtomicString> supportedPropertyNames() const;
>+ Optional<Variant<RefPtr<RadioNodeList>, RefPtr<Element>>> namedItem(const AtomString&);
>+ Vector<AtomString> supportedPropertyNames() const;
> 
> String enctype() const { return m_attributes.encodingType(); }
> WEBCORE_EXPORT void setEnctype(const String&);
> 
> bool shouldAutocomplete() const;
> 
>- WEBCORE_EXPORT void setAutocomplete(const AtomicString&);
>- WEBCORE_EXPORT const AtomicString& autocomplete() const;
>+ WEBCORE_EXPORT void setAutocomplete(const AtomString&);
>+ WEBCORE_EXPORT const AtomString& autocomplete() const;
> 
> #if ENABLE(IOS_AUTOCORRECT_AND_AUTOCAPITALIZE)
> WEBCORE_EXPORT bool shouldAutocorrect() const final;
>@@ -137,7 +137,7 @@ private:
> 
> void handleLocalEvents(Event&, EventInvokePhase) final;
> 
>- void parseAttribute(const QualifiedName&, const AtomicString&) final;
>+ void parseAttribute(const QualifiedName&, const AtomString&) final;
> bool isURLAttribute(const Attribute&) const final;
> 
> void resumeFromDocumentSuspension() final;
>@@ -158,8 +158,8 @@ private:
> // are any invalid controls in this form.
> bool checkInvalidControlsAndCollectUnhandled(Vector<RefPtr<HTMLFormControlElement>>&);
> 
>- RefPtr<HTMLElement> elementFromPastNamesMap(const AtomicString&) const;
>- void addToPastNamesMap(FormNamedItem*, const AtomicString& pastName);
>+ RefPtr<HTMLElement> elementFromPastNamesMap(const AtomString&) const;
>+ void addToPastNamesMap(FormNamedItem*, const AtomString& pastName);
> void assertItemCanBeInPastNamesMap(FormNamedItem*) const;
> void removeFromPastNamesMap(FormNamedItem*);
> 
>@@ -168,7 +168,7 @@ private:
> 
> void resetAssociatedFormControlElements();
> 
>- typedef HashMap<RefPtr<AtomicStringImpl>, FormNamedItem*> PastNamesMap;
>+ typedef HashMap<RefPtr<AtomStringImpl>, FormNamedItem*> PastNamesMap;
> 
> FormSubmission::Attributes m_attributes;
> std::unique_ptr<PastNamesMap> m_pastNamesMap;
>diff --git a/Source/WebCore/html/HTMLFrameElement.cpp b/Source/WebCore/html/HTMLFrameElement.cpp
>index 314e73327157cdf95a6492404d3f5dc5cddb9820..dcd92d0ac7eabf523f6327c438f91b958fec54a6 100644
>--- a/Source/WebCore/html/HTMLFrameElement.cpp
>+++ b/Source/WebCore/html/HTMLFrameElement.cpp
>@@ -74,7 +74,7 @@ void HTMLFrameElement::didAttachRenderers()
> m_frameBorder = containingFrameSet->hasFrameBorder();
> }
> 
>-void HTMLFrameElement::parseAttribute(const QualifiedName& name, const AtomicString& value)
>+void HTMLFrameElement::parseAttribute(const QualifiedName& name, const AtomString& value)
> {
> if (name == frameborderAttr) {
> m_frameBorder = value.toInt();
>diff --git a/Source/WebCore/html/HTMLFrameElement.h b/Source/WebCore/html/HTMLFrameElement.h
>index 92bf5981941c5a96735d49b74eac4d6216d37447..e9e125817a28bdb50dfa281c2d631feaac3bfa46 100644
>--- a/Source/WebCore/html/HTMLFrameElement.h
>+++ b/Source/WebCore/html/HTMLFrameElement.h
>@@ -45,7 +45,7 @@ private:
> void didAttachRenderers() final;
> bool rendererIsNeeded(const RenderStyle&) final;
> RenderPtr<RenderElement> createElementRenderer(RenderStyle&&, const RenderTreePosition&) final;
>- void parseAttribute(const QualifiedName&, const AtomicString&) final;
>+ void parseAttribute(const QualifiedName&, const AtomString&) final;
> 
> bool m_frameBorder { true };
> bool m_frameBorderSet { false };
>diff --git a/Source/WebCore/html/HTMLFrameElementBase.cpp b/Source/WebCore/html/HTMLFrameElementBase.cpp
>index 1526369a2e31b300ceabd70b07d223e733343640..b9030110b74e441239fbfe99e53a356d699442b3 100644
>--- a/Source/WebCore/html/HTMLFrameElementBase.cpp
>+++ b/Source/WebCore/html/HTMLFrameElementBase.cpp
>@@ -103,7 +103,7 @@ void HTMLFrameElementBase::openURL(LockHistory lockHistory, LockBackForwardList
> parentFrame->loader().subframeLoader().requestFrame(*this, m_URL, frameName, lockHistory, lockBackForwardList);
> }
> 
>-void HTMLFrameElementBase::parseAttribute(const QualifiedName& name, const AtomicString& value)
>+void HTMLFrameElementBase::parseAttribute(const QualifiedName& name, const AtomString& value)
> {
> if (name == srcdocAttr)
> setLocation("about:srcdoc");
>@@ -171,7 +171,7 @@ void HTMLFrameElementBase::setLocation(const String& str)
> if (document().settings().needsAcrobatFrameReloadingQuirk() && m_URL == str)
> return;
> 
>- m_URL = AtomicString(str);
>+ m_URL = AtomString(str);
> 
> if (isConnected())
> openURL(LockHistory::No, LockBackForwardList::No);
>diff --git a/Source/WebCore/html/HTMLFrameElementBase.h b/Source/WebCore/html/HTMLFrameElementBase.h
>index 1669e7bbbe51371ba26f93117584a693e51b1da7..5016f8f6ce597857b4b6b96020ea853a415abfbd 100644
>--- a/Source/WebCore/html/HTMLFrameElementBase.h
>+++ b/Source/WebCore/html/HTMLFrameElementBase.h
>@@ -56,7 +56,7 @@ protected:
> 
> bool isURLAllowed() const;
> 
>- void parseAttribute(const QualifiedName&, const AtomicString&) override;
>+ void parseAttribute(const QualifiedName&, const AtomString&) override;
> InsertedIntoAncestorResult insertedIntoAncestor(InsertionType, ContainerNode&) final;
> void didFinishInsertingNode() final;
> void didAttachRenderers() override;
>@@ -72,7 +72,7 @@ private:
> 
> void openURL(LockHistory = LockHistory::Yes, LockBackForwardList = LockBackForwardList::Yes);
> 
>- AtomicString m_URL;
>+ AtomString m_URL;
> 
> ScrollbarMode m_scrolling;
> 
>diff --git a/Source/WebCore/html/HTMLFrameSetElement.cpp b/Source/WebCore/html/HTMLFrameSetElement.cpp
>index 5d237d4826c72f887b7db2fb51d6e97865679a99..83ac680d9048757150b5b6eb36b64d788f0ebc70 100644
>--- a/Source/WebCore/html/HTMLFrameSetElement.cpp
>+++ b/Source/WebCore/html/HTMLFrameSetElement.cpp
>@@ -75,7 +75,7 @@ bool HTMLFrameSetElement::isPresentationAttribute(const QualifiedName& name) con
> return HTMLElement::isPresentationAttribute(name);
> }
> 
>-void HTMLFrameSetElement::collectStyleForPresentationAttribute(const QualifiedName& name, const AtomicString& value, MutableStyleProperties& style)
>+void HTMLFrameSetElement::collectStyleForPresentationAttribute(const QualifiedName& name, const AtomString& value, MutableStyleProperties& style)
> {
> if (name == bordercolorAttr)
> addHTMLColorToStyle(style, CSSPropertyBorderColor, value);
>@@ -83,7 +83,7 @@ void HTMLFrameSetElement::collectStyleForPresentationAttribute(const QualifiedNa
> HTMLElement::collectStyleForPresentationAttribute(name, value, style);
> }
> 
>-void HTMLFrameSetElement::parseAttribute(const QualifiedName& name, const AtomicString& value)
>+void HTMLFrameSetElement::parseAttribute(const QualifiedName& name, const AtomString& value)
> {
> if (name == rowsAttr) {
> // FIXME: What is the right thing to do when removing this attribute?
>@@ -231,7 +231,7 @@ void HTMLFrameSetElement::removedFromAncestor(RemovalType removalType, Container
> }
> }
> 
>-WindowProxy* HTMLFrameSetElement::namedItem(const AtomicString& name)
>+WindowProxy* HTMLFrameSetElement::namedItem(const AtomString& name)
> {
> auto frameElement = makeRefPtr(children()->namedItem(name));
> if (!is<HTMLFrameElement>(frameElement))
>@@ -240,7 +240,7 @@ WindowProxy* HTMLFrameSetElement::namedItem(const AtomicString& name)
> return downcast<HTMLFrameElement>(*frameElement).contentWindow();
> }
> 
>-Vector<AtomicString> HTMLFrameSetElement::supportedPropertyNames() const
>+Vector<AtomString> HTMLFrameSetElement::supportedPropertyNames() const
> {
> // NOTE: Left empty as no specification defines this named getter and we
> // have not historically exposed these named items for enumeration.
>diff --git a/Source/WebCore/html/HTMLFrameSetElement.h b/Source/WebCore/html/HTMLFrameSetElement.h
>index c3c68b57bf977e7acea92ff3aec096496f7122b2..91135b08bc6d604b3d769e973ad27d48f83d984f 100644
>--- a/Source/WebCore/html/HTMLFrameSetElement.h
>+++ b/Source/WebCore/html/HTMLFrameSetElement.h
>@@ -47,15 +47,15 @@ public:
> 
> static RefPtr<HTMLFrameSetElement> findContaining(Element* descendant);
> 
>- Vector<AtomicString> supportedPropertyNames() const;
>- WindowProxy* namedItem(const AtomicString&);
>+ Vector<AtomString> supportedPropertyNames() const;
>+ WindowProxy* namedItem(const AtomString&);
> 
> private:
> HTMLFrameSetElement(const QualifiedName&, Document&);
> 
>- void parseAttribute(const QualifiedName&, const AtomicString&) final;
>+ void parseAttribute(const QualifiedName&, const AtomString&) final;
> bool isPresentationAttribute(const QualifiedName&) const final;
>- void collectStyleForPresentationAttribute(const QualifiedName&, const AtomicString&, MutableStyleProperties&) final;
>+ void collectStyleForPresentationAttribute(const QualifiedName&, const AtomString&, MutableStyleProperties&) final;
> 
> void willAttachRenderers() final;
> bool rendererIsNeeded(const RenderStyle&) final;
>diff --git a/Source/WebCore/html/HTMLHRElement.cpp b/Source/WebCore/html/HTMLHRElement.cpp
>index 3d35249f7c62560ad854e86ee238ff88d8d89966..63034c865a3051bf8d9a22aaeb80517b81b09c07 100644
>--- a/Source/WebCore/html/HTMLHRElement.cpp
>+++ b/Source/WebCore/html/HTMLHRElement.cpp
>@@ -59,7 +59,7 @@ bool HTMLHRElement::isPresentationAttribute(const QualifiedName& name) const
> return HTMLElement::isPresentationAttribute(name);
> }
> 
>-void HTMLHRElement::collectStyleForPresentationAttribute(const QualifiedName& name, const AtomicString& value, MutableStyleProperties& style)
>+void HTMLHRElement::collectStyleForPresentationAttribute(const QualifiedName& name, const AtomString& value, MutableStyleProperties& style)
> {
> if (name == alignAttr) {
> if (equalLettersIgnoringASCIICase(value, "left")) {
>diff --git a/Source/WebCore/html/HTMLHRElement.h b/Source/WebCore/html/HTMLHRElement.h
>index ebecbd26dff26e24aad58f74c88748de962b8cc8..f836be5786bfe5d3db904038d003eed15e7c1e61 100644
>--- a/Source/WebCore/html/HTMLHRElement.h
>+++ b/Source/WebCore/html/HTMLHRElement.h
>@@ -36,7 +36,7 @@ private:
> HTMLHRElement(const QualifiedName&, Document&);
> 
> bool isPresentationAttribute(const QualifiedName&) const final;
>- void collectStyleForPresentationAttribute(const QualifiedName&, const AtomicString&, MutableStyleProperties&) final;
>+ void collectStyleForPresentationAttribute(const QualifiedName&, const AtomString&, MutableStyleProperties&) final;
> bool canContainRangeEndPoint() const final;
> };
> 
>diff --git a/Source/WebCore/html/HTMLIFrameElement.cpp b/Source/WebCore/html/HTMLIFrameElement.cpp
>index ee3d1dfb07eec7ef16d13404b67fefcc10a783fa..fa07d7185c07314764bd771c1b241de57af27514 100644
>--- a/Source/WebCore/html/HTMLIFrameElement.cpp
>+++ b/Source/WebCore/html/HTMLIFrameElement.cpp
>@@ -67,7 +67,7 @@ bool HTMLIFrameElement::isPresentationAttribute(const QualifiedName& name) const
> return HTMLFrameElementBase::isPresentationAttribute(name);
> }
> 
>-void HTMLIFrameElement::collectStyleForPresentationAttribute(const QualifiedName& name, const AtomicString& value, MutableStyleProperties& style)
>+void HTMLIFrameElement::collectStyleForPresentationAttribute(const QualifiedName& name, const AtomString& value, MutableStyleProperties& style)
> {
> if (name == widthAttr)
> addHTMLLengthToStyle(style, CSSPropertyWidth, value);
>@@ -86,7 +86,7 @@ void HTMLIFrameElement::collectStyleForPresentationAttribute(const QualifiedName
> HTMLFrameElementBase::collectStyleForPresentationAttribute(name, value, style);
> }
> 
>-void HTMLIFrameElement::parseAttribute(const QualifiedName& name, const AtomicString& value)
>+void HTMLIFrameElement::parseAttribute(const QualifiedName& name, const AtomString& value)
> {
> if (name == sandboxAttr) {
> if (m_sandbox)
>@@ -112,7 +112,7 @@ RenderPtr<RenderElement> HTMLIFrameElement::createElementRenderer(RenderStyle&&
> return createRenderer<RenderIFrame>(*this, WTFMove(style));
> }
> 
>-void HTMLIFrameElement::setReferrerPolicyForBindings(const AtomicString& value)
>+void HTMLIFrameElement::setReferrerPolicyForBindings(const AtomString& value)
> {
> setAttributeWithoutSynchronization(referrerpolicyAttr, value);
> }
>diff --git a/Source/WebCore/html/HTMLIFrameElement.h b/Source/WebCore/html/HTMLIFrameElement.h
>index 77addb27190bfe3b2cd0410bf36a1e41e1fe75b6..08d92c8362958c6ea91c7887683dcf3918c3e14e 100644
>--- a/Source/WebCore/html/HTMLIFrameElement.h
>+++ b/Source/WebCore/html/HTMLIFrameElement.h
>@@ -41,7 +41,7 @@ public:
> RenderIFrame* renderer() const;
> const String& allow() const { return m_allow; }
> 
>- void setReferrerPolicyForBindings(const AtomicString&);
>+ void setReferrerPolicyForBindings(const AtomString&);
> String referrerPolicyForBindings() const;
> ReferrerPolicy referrerPolicy() const final;
> 
>@@ -54,9 +54,9 @@ private:
> bool isKeyboardFocusable(KeyboardEvent*) const final { return false; }
> #endif
> 
>- void parseAttribute(const QualifiedName&, const AtomicString&) final;
>+ void parseAttribute(const QualifiedName&, const AtomString&) final;
> bool isPresentationAttribute(const QualifiedName&) const final;
>- void collectStyleForPresentationAttribute(const QualifiedName&, const AtomicString&, MutableStyleProperties&) final;
>+ void collectStyleForPresentationAttribute(const QualifiedName&, const AtomString&, MutableStyleProperties&) final;
> 
> bool rendererIsNeeded(const RenderStyle&) final;
> RenderPtr<RenderElement> createElementRenderer(RenderStyle&&, const RenderTreePosition&) final;
>diff --git a/Source/WebCore/html/HTMLImageElement.cpp b/Source/WebCore/html/HTMLImageElement.cpp
>index 5cdc709399920d69672a97ce7fe5e831f5892736..93ead5cccb0d27845536f7c7a73cfcd343efac45 100644
>--- a/Source/WebCore/html/HTMLImageElement.cpp
>+++ b/Source/WebCore/html/HTMLImageElement.cpp
>@@ -115,7 +115,7 @@ bool HTMLImageElement::isPresentationAttribute(const QualifiedName& name) const
> return HTMLElement::isPresentationAttribute(name);
> }
> 
>-void HTMLImageElement::collectStyleForPresentationAttribute(const QualifiedName& name, const AtomicString& value, MutableStyleProperties& style)
>+void HTMLImageElement::collectStyleForPresentationAttribute(const QualifiedName& name, const AtomString& value, MutableStyleProperties& style)
> {
> if (name == widthAttr)
> addHTMLLengthToStyle(style, CSSPropertyWidth, value);
>@@ -137,15 +137,15 @@ void HTMLImageElement::collectStyleForPresentationAttribute(const QualifiedName&
> HTMLElement::collectStyleForPresentationAttribute(name, value, style);
> }
> 
>-const AtomicString& HTMLImageElement::imageSourceURL() const
>+const AtomString& HTMLImageElement::imageSourceURL() const
> {
> return m_bestFitImageURL.isEmpty() ? attributeWithoutSynchronization(srcAttr) : m_bestFitImageURL;
> }
> 
> void HTMLImageElement::setBestFitURLAndDPRFromImageCandidate(const ImageCandidate& candidate)
> {
>- m_bestFitImageURL = candidate.string.toAtomicString();
>- m_currentSrc = AtomicString(document().completeURL(imageSourceURL()).string());
>+ m_bestFitImageURL = candidate.string.toAtomString();
>+ m_currentSrc = AtomString(document().completeURL(imageSourceURL()).string());
> if (candidate.density >= 0)
> m_imageDevicePixelRatio = 1 / candidate.density;
> if (is<RenderImage>(renderer()))
>@@ -215,7 +215,7 @@ void HTMLImageElement::selectImageSource()
> m_imageLoader.updateFromElementIgnoringPreviousError();
> }
> 
>-void HTMLImageElement::parseAttribute(const QualifiedName& name, const AtomicString& value)
>+void HTMLImageElement::parseAttribute(const QualifiedName& name, const AtomString& value)
> {
> if (name == altAttr) {
> if (is<RenderImage>(renderer()))
>@@ -247,7 +247,7 @@ void HTMLImageElement::parseAttribute(const QualifiedName& name, const AtomicStr
> bool willHaveName = !value.isNull();
> if (m_hadNameBeforeAttributeChanged != willHaveName && isConnected() && !isInShadowTree() && is<HTMLDocument>(document())) {
> HTMLDocument& document = downcast<HTMLDocument>(this->document());
>- const AtomicString& id = getIdAttribute();
>+ const AtomString& id = getIdAttribute();
> if (!id.isEmpty() && id != getNameAttribute()) {
> if (willHaveName)
> document.addDocumentNamedItem(*id.impl(), *this);
>@@ -261,12 +261,12 @@ void HTMLImageElement::parseAttribute(const QualifiedName& name, const AtomicStr
> }
> }
> 
>-const AtomicString& HTMLImageElement::altText() const
>+const AtomString& HTMLImageElement::altText() const
> {
> // lets figure out the alt text.. magic stuff
> // http://www.w3.org/TR/1998/REC-html40-19980424/appendix/notes.html#altgen
> // also heavily discussed by Hixie on bugzilla
>- const AtomicString& alt = attributeWithoutSynchronization(altAttr);
>+ const AtomString& alt = attributeWithoutSynchronization(altAttr);
> if (!alt.isNull())
> return alt;
> // fall back to title attribute
>@@ -564,7 +564,7 @@ String HTMLImageElement::completeURLsInAttributeValue(const URL& base, const Att
> return HTMLElement::completeURLsInAttributeValue(base, attribute);
> }
> 
>-bool HTMLImageElement::matchesUsemap(const AtomicStringImpl& name) const
>+bool HTMLImageElement::matchesUsemap(const AtomStringImpl& name) const
> {
> return m_parsedUsemap.impl() == &name;
> }
>@@ -574,7 +574,7 @@ HTMLMapElement* HTMLImageElement::associatedMapElement() const
> return treeScope().getImageMap(m_parsedUsemap);
> }
> 
>-const AtomicString& HTMLImageElement::alt() const
>+const AtomString& HTMLImageElement::alt() const
> {
> return attributeWithoutSynchronization(altAttr);
> }
>@@ -634,7 +634,7 @@ bool HTMLImageElement::complete() const
> 
> DecodingMode HTMLImageElement::decodingMode() const
> {
>- const AtomicString& decodingMode = attributeWithoutSynchronization(decodingAttr);
>+ const AtomString& decodingMode = attributeWithoutSynchronization(decodingAttr);
> if (equalLettersIgnoringASCIICase(decodingMode, "sync"))
> return DecodingMode::Synchronous;
> if (equalLettersIgnoringASCIICase(decodingMode, "async"))
>@@ -667,7 +667,7 @@ bool HTMLImageElement::isServerMap() const
> if (!hasAttributeWithoutSynchronization(ismapAttr))
> return false;
> 
>- const AtomicString& usemap = attributeWithoutSynchronization(usemapAttr);
>+ const AtomString& usemap = attributeWithoutSynchronization(usemapAttr);
> 
> // If the usemap attribute starts with '#', it refers to a map element in the document.
> if (usemap.string()[0] == '#')
>@@ -676,7 +676,7 @@ bool HTMLImageElement::isServerMap() const
> return document().completeURL(stripLeadingAndTrailingHTMLSpaces(usemap)).isEmpty();
> }
> 
>-void HTMLImageElement::setCrossOrigin(const AtomicString& value)
>+void HTMLImageElement::setCrossOrigin(const AtomString& value)
> {
> setAttributeWithoutSynchronization(crossoriginAttr, value);
> }
>diff --git a/Source/WebCore/html/HTMLImageElement.h b/Source/WebCore/html/HTMLImageElement.h
>index 1869880df3bf44a122a880feead62cfaef44eb15..d4f214d351bc6fa18a7a16c83811e1f9bb57a2d2 100644
>--- a/Source/WebCore/html/HTMLImageElement.h
>+++ b/Source/WebCore/html/HTMLImageElement.h
>@@ -54,14 +54,14 @@ public:
> 
> WEBCORE_EXPORT int naturalWidth() const;
> WEBCORE_EXPORT int naturalHeight() const;
>- const AtomicString& currentSrc() const { return m_currentSrc; }
>+ const AtomString& currentSrc() const { return m_currentSrc; }
> 
> bool supportsFocus() const override;
> bool isFocusable() const override;
> 
> bool isServerMap() const;
> 
>- const AtomicString& altText() const;
>+ const AtomString& altText() const;
> 
> CompositeOperator compositeOperator() const { return m_compositeOperator; }
> 
>@@ -69,17 +69,17 @@ public:
> 
> void setLoadManually(bool loadManually) { m_imageLoader.setLoadManually(loadManually); }
> 
>- bool matchesUsemap(const AtomicStringImpl&) const;
>+ bool matchesUsemap(const AtomStringImpl&) const;
> HTMLMapElement* associatedMapElement() const;
> 
>- WEBCORE_EXPORT const AtomicString& alt() const;
>+ WEBCORE_EXPORT const AtomString& alt() const;
> 
> WEBCORE_EXPORT void setHeight(unsigned);
> 
> URL src() const;
> void setSrc(const String&);
> 
>- WEBCORE_EXPORT void setCrossOrigin(const AtomicString&);
>+ WEBCORE_EXPORT void setCrossOrigin(const AtomString&);
> WEBCORE_EXPORT String crossOrigin() const;
> 
> WEBCORE_EXPORT void setWidth(unsigned);
>@@ -107,7 +107,7 @@ public:
> 
> bool canContainRangeEndPoint() const override { return false; }
> 
>- const AtomicString& imageSourceURL() const override;
>+ const AtomString& imageSourceURL() const override;
> 
> bool hasShadowControls() const { return m_experimentalImageMenuEnabled; }
> 
>@@ -129,9 +129,9 @@ protected:
> void didMoveToNewDocument(Document& oldDocument, Document& newDocument) override;
> 
> private:
>- void parseAttribute(const QualifiedName&, const AtomicString&) override;
>+ void parseAttribute(const QualifiedName&, const AtomString&) override;
> bool isPresentationAttribute(const QualifiedName&) const override;
>- void collectStyleForPresentationAttribute(const QualifiedName&, const AtomicString&, MutableStyleProperties&) override;
>+ void collectStyleForPresentationAttribute(const QualifiedName&, const AtomString&, MutableStyleProperties&) override;
> 
> void didAttachRenderers() override;
> RenderPtr<RenderElement> createElementRenderer(RenderStyle&&, const RenderTreePosition&) override;
>@@ -177,9 +177,9 @@ private:
> WeakPtr<HTMLFormElement> m_formSetByParser;
> 
> CompositeOperator m_compositeOperator;
>- AtomicString m_bestFitImageURL;
>- AtomicString m_currentSrc;
>- AtomicString m_parsedUsemap;
>+ AtomString m_bestFitImageURL;
>+ AtomString m_currentSrc;
>+ AtomString m_parsedUsemap;
> float m_imageDevicePixelRatio;
> bool m_experimentalImageMenuEnabled;
> bool m_hadNameBeforeAttributeChanged { false }; // FIXME: We only need this because parseAttribute() can't see the old value.
>diff --git a/Source/WebCore/html/HTMLImageLoader.cpp b/Source/WebCore/html/HTMLImageLoader.cpp
>index ee786ae85dfddf57abd1d3b3a730c93347eea660..b664940c3a321ac0f2c02e519852880a3a5d7528 100644
>--- a/Source/WebCore/html/HTMLImageLoader.cpp
>+++ b/Source/WebCore/html/HTMLImageLoader.cpp
>@@ -61,7 +61,7 @@ void HTMLImageLoader::dispatchLoadEvent()
> element().dispatchEvent(Event::create(errorOccurred ? eventNames().errorEvent : eventNames().loadEvent, Event::CanBubble::No, Event::IsCancelable::No));
> }
> 
>-String HTMLImageLoader::sourceURI(const AtomicString& attr) const
>+String HTMLImageLoader::sourceURI(const AtomString& attr) const
> {
> return stripLeadingAndTrailingHTMLSpaces(attr);
> }
>diff --git a/Source/WebCore/html/HTMLImageLoader.h b/Source/WebCore/html/HTMLImageLoader.h
>index a81589a0a83bb68b17139a13db2053adb798e3ef..f22742e6e29cc2b5402b4b0b1d149aafe4b86b72 100644
>--- a/Source/WebCore/html/HTMLImageLoader.h
>+++ b/Source/WebCore/html/HTMLImageLoader.h
>@@ -32,7 +32,7 @@ public:
> virtual ~HTMLImageLoader();
> 
> void dispatchLoadEvent() override;
>- String sourceURI(const AtomicString&) const override;
>+ String sourceURI(const AtomString&) const override;
> 
> void notifyFinished(CachedResource&) final;
> };
>diff --git a/Source/WebCore/html/HTMLInputElement.cpp b/Source/WebCore/html/HTMLInputElement.cpp
>index 096470b10faec1046197f2362cc18e67396be9ed..d3ee460291c877c0ffc35bd57cae74b8f52d43f1 100644
>--- a/Source/WebCore/html/HTMLInputElement.cpp
>+++ b/Source/WebCore/html/HTMLInputElement.cpp
>@@ -83,7 +83,7 @@ using namespace HTMLNames;
> class ListAttributeTargetObserver : IdTargetObserver {
> WTF_MAKE_FAST_ALLOCATED;
> public:
>- ListAttributeTargetObserver(const AtomicString& id, HTMLInputElement*);
>+ ListAttributeTargetObserver(const AtomString& id, HTMLInputElement*);
> 
> void idTargetChanged() override;
> 
>@@ -180,7 +180,7 @@ HTMLInputElement::~HTMLInputElement()
> #endif
> }
> 
>-const AtomicString& HTMLInputElement::name() const
>+const AtomString& HTMLInputElement::name() const
> {
> return m_name.isNull() ? emptyAtom() : m_name;
> }
>@@ -507,7 +507,7 @@ void HTMLInputElement::handleBlurEvent()
> m_inputType->handleBlurEvent();
> }
> 
>-void HTMLInputElement::setType(const AtomicString& type)
>+void HTMLInputElement::setType(const AtomString& type)
> {
> setAttributeWithoutSynchronization(typeAttr, type);
> }
>@@ -619,7 +619,7 @@ void HTMLInputElement::subtreeHasChanged()
> calculateAndAdjustDirectionality();
> }
> 
>-const AtomicString& HTMLInputElement::formControlType() const
>+const AtomString& HTMLInputElement::formControlType() const
> {
> return m_inputType->formControlType();
> }
>@@ -667,7 +667,7 @@ bool HTMLInputElement::isPresentationAttribute(const QualifiedName& name) const
> return HTMLTextFormControlElement::isPresentationAttribute(name);
> }
> 
>-void HTMLInputElement::collectStyleForPresentationAttribute(const QualifiedName& name, const AtomicString& value, MutableStyleProperties& style)
>+void HTMLInputElement::collectStyleForPresentationAttribute(const QualifiedName& name, const AtomString& value, MutableStyleProperties& style)
> {
> if (name == vspaceAttr) {
> addHTMLLengthToStyle(style, CSSPropertyMarginTop, value);
>@@ -695,7 +695,7 @@ inline void HTMLInputElement::initializeInputType()
> ASSERT(m_parsingInProgress);
> ASSERT(!m_inputType);
> 
>- const AtomicString& type = attributeWithoutSynchronization(typeAttr);
>+ const AtomString& type = attributeWithoutSynchronization(typeAttr);
> if (type.isNull()) {
> m_inputType = InputType::createText(*this);
> ensureUserAgentShadowRoot();
>@@ -711,7 +711,7 @@ inline void HTMLInputElement::initializeInputType()
> runPostTypeUpdateTasks();
> }
> 
>-void HTMLInputElement::parseAttribute(const QualifiedName& name, const AtomicString& value)
>+void HTMLInputElement::parseAttribute(const QualifiedName& name, const AtomString& value)
> {
> ASSERT(m_inputType);
> Ref<InputType> protectedInputType(*m_inputType);
>@@ -1798,7 +1798,7 @@ bool HTMLInputElement::isEmptyValue() const
> return m_inputType->isEmptyValue();
> }
> 
>-void HTMLInputElement::maxLengthAttributeChanged(const AtomicString& newValue)
>+void HTMLInputElement::maxLengthAttributeChanged(const AtomString& newValue)
> {
> unsigned oldEffectiveMaxLength = effectiveMaxLength();
> internalSetMaxLength(parseHTMLNonNegativeInteger(newValue).value_or(-1));
>@@ -1810,7 +1810,7 @@ void HTMLInputElement::maxLengthAttributeChanged(const AtomicString& newValue)
> updateValidity();
> }
> 
>-void HTMLInputElement::minLengthAttributeChanged(const AtomicString& newValue)
>+void HTMLInputElement::minLengthAttributeChanged(const AtomString& newValue)
> {
> int oldMinLength = minLength();
> internalSetMinLength(parseHTMLNonNegativeInteger(newValue).value_or(-1));
>@@ -1936,7 +1936,7 @@ void HTMLInputElement::setWidth(unsigned width)
> }
> 
> #if ENABLE(DATALIST_ELEMENT)
>-ListAttributeTargetObserver::ListAttributeTargetObserver(const AtomicString& id, HTMLInputElement* element)
>+ListAttributeTargetObserver::ListAttributeTargetObserver(const AtomString& id, HTMLInputElement* element)
> : IdTargetObserver(element->treeScope().idTargetObserverRegistry(), id)
> , m_element(element)
> {
>@@ -2094,8 +2094,8 @@ bool HTMLInputElement::setupDateTimeChooserParameters(DateTimeChooserParameters&
> if (!document().settings().langAttributeAwareFormControlUIEnabled())
> parameters.locale = defaultLanguage();
> else {
>- AtomicString computedLocale = computeInheritedLanguage();
>- parameters.locale = computedLocale.isEmpty() ? AtomicString(defaultLanguage()) : computedLocale;
>+ AtomString computedLocale = computeInheritedLanguage();
>+ parameters.locale = computedLocale.isEmpty() ? AtomString(defaultLanguage()) : computedLocale;
> }
> 
> StepRange stepRange = createStepRange(RejectAny);
>diff --git a/Source/WebCore/html/HTMLInputElement.h b/Source/WebCore/html/HTMLInputElement.h
>index 276dbc9430d5f12940d6b64a5d693d0631bf27cb..08114dd7babd17ab454024eafe027365b4bf9e4b 100644
>--- a/Source/WebCore/html/HTMLInputElement.h
>+++ b/Source/WebCore/html/HTMLInputElement.h
>@@ -168,7 +168,7 @@ public:
> bool sizeShouldIncludeDecoration(int& preferredSize) const;
> float decorationWidth() const;
> 
>- WEBCORE_EXPORT void setType(const AtomicString&);
>+ WEBCORE_EXPORT void setType(const AtomString&);
> 
> WEBCORE_EXPORT String value() const final;
> WEBCORE_EXPORT ExceptionOr<void> setValue(const String&, TextFieldEventBehavior = DispatchNoEvent);
>@@ -311,7 +311,7 @@ public:
> void blur() final;
> void defaultBlur();
> 
>- const AtomicString& name() const final;
>+ const AtomString& name() const final;
> 
> void endEditing();
> 
>@@ -375,7 +375,7 @@ private:
> 
> bool canTriggerImplicitSubmission() const final { return isTextField(); }
> 
>- const AtomicString& formControlType() const final;
>+ const AtomString& formControlType() const final;
> 
> bool shouldSaveAndRestoreFormControlState() const final;
> FormControlState saveFormControlState() const final;
>@@ -387,9 +387,9 @@ private:
> 
> void accessKeyAction(bool sendMouseEvents) final;
> 
>- void parseAttribute(const QualifiedName&, const AtomicString&) final;
>+ void parseAttribute(const QualifiedName&, const AtomString&) final;
> bool isPresentationAttribute(const QualifiedName&) const final;
>- void collectStyleForPresentationAttribute(const QualifiedName&, const AtomicString&, MutableStyleProperties&) final;
>+ void collectStyleForPresentationAttribute(const QualifiedName&, const AtomString&, MutableStyleProperties&) final;
> void finishParsingChildren() final;
> void parserDidSetAttributes() final;
> 
>@@ -445,8 +445,8 @@ private:
> #if ENABLE(DATALIST_ELEMENT)
> void resetListAttributeTargetObserver();
> #endif
>- void maxLengthAttributeChanged(const AtomicString& newValue);
>- void minLengthAttributeChanged(const AtomicString& newValue);
>+ void maxLengthAttributeChanged(const AtomString& newValue);
>+ void minLengthAttributeChanged(const AtomString& newValue);
> void updateValueIfNeeded();
> 
> void addToRadioButtonGroup();
>@@ -454,7 +454,7 @@ private:
> 
> void setDefaultSelectionAfterFocus(SelectionRevealMode);
> 
>- AtomicString m_name;
>+ AtomString m_name;
> String m_valueIfDirty;
> unsigned m_size;
> short m_maxResults { -1 };
>diff --git a/Source/WebCore/html/HTMLKeygenElement.cpp b/Source/WebCore/html/HTMLKeygenElement.cpp
>index bc35f57b4218bf4bffbc70f971d415e5e36a9d00..1f2b00a04e80ccc9efd19610509ea203cd63b175 100644
>--- a/Source/WebCore/html/HTMLKeygenElement.cpp
>+++ b/Source/WebCore/html/HTMLKeygenElement.cpp
>@@ -57,7 +57,7 @@ protected:
> KeygenSelectElement(Document& document)
> : HTMLSelectElement(selectTag, document, 0)
> {
>- static NeverDestroyed<AtomicString> pseudoId("-webkit-keygen-select", AtomicString::ConstructFromLiteral);
>+ static NeverDestroyed<AtomString> pseudoId("-webkit-keygen-select", AtomString::ConstructFromLiteral);
> setPseudo(pseudoId);
> }
> 
>@@ -92,7 +92,7 @@ Ref<HTMLKeygenElement> HTMLKeygenElement::create(const QualifiedName& tagName, D
> return adoptRef(*new HTMLKeygenElement(tagName, document, form));
> }
> 
>-void HTMLKeygenElement::parseAttribute(const QualifiedName& name, const AtomicString& value)
>+void HTMLKeygenElement::parseAttribute(const QualifiedName& name, const AtomString& value)
> {
> // Reflect disabled attribute on the shadow select element
> if (name == disabledAttr)
>@@ -107,7 +107,7 @@ bool HTMLKeygenElement::isKeytypeRSA() const
> return keyType.isNull() || equalLettersIgnoringASCIICase(keyType, "rsa");
> }
> 
>-void HTMLKeygenElement::setKeytype(const AtomicString& value)
>+void HTMLKeygenElement::setKeytype(const AtomString& value)
> {
> setAttributeWithoutSynchronization(keytypeAttr, value);
> }
>@@ -129,9 +129,9 @@ bool HTMLKeygenElement::appendFormData(DOMFormData& formData, bool)
> return true;
> }
> 
>-const AtomicString& HTMLKeygenElement::formControlType() const
>+const AtomString& HTMLKeygenElement::formControlType() const
> {
>- static NeverDestroyed<const AtomicString> keygen("keygen", AtomicString::ConstructFromLiteral);
>+ static NeverDestroyed<const AtomString> keygen("keygen", AtomString::ConstructFromLiteral);
> return keygen;
> }
> 
>diff --git a/Source/WebCore/html/HTMLKeygenElement.h b/Source/WebCore/html/HTMLKeygenElement.h
>index 9c9c9e783c7d2b277a79c1c608842f377f90cc64..969227991d90bf9c0aa639100e5515709e6f5c50 100644
>--- a/Source/WebCore/html/HTMLKeygenElement.h
>+++ b/Source/WebCore/html/HTMLKeygenElement.h
>@@ -34,7 +34,7 @@ class HTMLKeygenElement final : public HTMLFormControlElementWithState {
> public:
> static Ref<HTMLKeygenElement> create(const QualifiedName&, Document&, HTMLFormElement*);
> 
>- void setKeytype(const AtomicString&);
>+ void setKeytype(const AtomString&);
> String keytype() const;
> 
> private:
>@@ -43,10 +43,10 @@ private:
> bool computeWillValidate() const final { return false; }
> bool canStartSelection() const final { return false; }
> 
>- void parseAttribute(const QualifiedName&, const AtomicString&) final;
>+ void parseAttribute(const QualifiedName&, const AtomString&) final;
> 
> bool appendFormData(DOMFormData&, bool) final;
>- const AtomicString& formControlType() const final;
>+ const AtomString& formControlType() const final;
> bool isOptionalFormControl() const final { return false; }
> 
> bool isEnumeratable() const final { return true; }
>diff --git a/Source/WebCore/html/HTMLLIElement.cpp b/Source/WebCore/html/HTMLLIElement.cpp
>index e92815b8f92043e5b78d4cd3300eaa2ddb763fdb..8e26b6108208dc58dc9ebd5caffb18e57437c890 100644
>--- a/Source/WebCore/html/HTMLLIElement.cpp
>+++ b/Source/WebCore/html/HTMLLIElement.cpp
>@@ -63,7 +63,7 @@ bool HTMLLIElement::isPresentationAttribute(const QualifiedName& name) const
> return HTMLElement::isPresentationAttribute(name);
> }
> 
>-void HTMLLIElement::collectStyleForPresentationAttribute(const QualifiedName& name, const AtomicString& value, MutableStyleProperties& style)
>+void HTMLLIElement::collectStyleForPresentationAttribute(const QualifiedName& name, const AtomString& value, MutableStyleProperties& style)
> {
> if (name == typeAttr) {
> if (value == "a")
>@@ -82,7 +82,7 @@ void HTMLLIElement::collectStyleForPresentationAttribute(const QualifiedName& na
> HTMLElement::collectStyleForPresentationAttribute(name, value, style);
> }
> 
>-void HTMLLIElement::parseAttribute(const QualifiedName& name, const AtomicString& value)
>+void HTMLLIElement::parseAttribute(const QualifiedName& name, const AtomString& value)
> {
> if (name == valueAttr) {
> if (renderer() && renderer()->isListItem())
>@@ -114,7 +114,7 @@ void HTMLLIElement::didAttachRenderers()
> parseValue(attributeWithoutSynchronization(valueAttr));
> }
> 
>-inline void HTMLLIElement::parseValue(const AtomicString& value)
>+inline void HTMLLIElement::parseValue(const AtomString& value)
> {
> ASSERT(renderer());
> 
>diff --git a/Source/WebCore/html/HTMLLIElement.h b/Source/WebCore/html/HTMLLIElement.h
>index 821215df09ddff45398d7d7dc706fa36f28aa090..8bf9b72b2de35485d2ab9f8a4a1541fb3895f8d5 100644
>--- a/Source/WebCore/html/HTMLLIElement.h
>+++ b/Source/WebCore/html/HTMLLIElement.h
>@@ -35,13 +35,13 @@ public:
> private:
> HTMLLIElement(const QualifiedName&, Document&);
> 
>- void parseAttribute(const QualifiedName&, const AtomicString&) final;
>+ void parseAttribute(const QualifiedName&, const AtomString&) final;
> bool isPresentationAttribute(const QualifiedName&) const final;
>- void collectStyleForPresentationAttribute(const QualifiedName&, const AtomicString&, MutableStyleProperties&) final;
>+ void collectStyleForPresentationAttribute(const QualifiedName&, const AtomString&, MutableStyleProperties&) final;
> 
> void didAttachRenderers() final;
> 
>- void parseValue(const AtomicString&);
>+ void parseValue(const AtomString&);
> };
> 
> } // namespace WebCore
>diff --git a/Source/WebCore/html/HTMLLabelElement.cpp b/Source/WebCore/html/HTMLLabelElement.cpp
>index cae2e1790fb93ac10e4373cfbb49d5f93d77b639..bb3f08db6cbc73654551f12b733f748acfa6b90b 100644
>--- a/Source/WebCore/html/HTMLLabelElement.cpp
>+++ b/Source/WebCore/html/HTMLLabelElement.cpp
>@@ -40,7 +40,7 @@ WTF_MAKE_ISO_ALLOCATED_IMPL(HTMLLabelElement);
> 
> using namespace HTMLNames;
> 
>-static LabelableElement* firstElementWithIdIfLabelable(TreeScope& treeScope, const AtomicString& id)
>+static LabelableElement* firstElementWithIdIfLabelable(TreeScope& treeScope, const AtomString& id)
> {
> auto element = makeRefPtr(treeScope.getElementById(id));
> if (!is<LabelableElement>(element))
>diff --git a/Source/WebCore/html/HTMLLinkElement.cpp b/Source/WebCore/html/HTMLLinkElement.cpp
>index adec9ea082753435f923bfd15f1a2a7ed2a06e0e..63e0f89015ff26965f749a0279c8accdc5f00667 100644
>--- a/Source/WebCore/html/HTMLLinkElement.cpp
>+++ b/Source/WebCore/html/HTMLLinkElement.cpp
>@@ -158,7 +158,7 @@ void HTMLLinkElement::setDisabledState(bool disabled)
> }
> }
> 
>-void HTMLLinkElement::parseAttribute(const QualifiedName& name, const AtomicString& value)
>+void HTMLLinkElement::parseAttribute(const QualifiedName& name, const AtomString& value)
> {
> if (name == relAttr) {
> m_relAttribute = LinkRelAttribute(document(), value);
>@@ -216,7 +216,7 @@ bool HTMLLinkElement::shouldLoadLink()
> return true;
> }
> 
>-void HTMLLinkElement::setCrossOrigin(const AtomicString& value)
>+void HTMLLinkElement::setCrossOrigin(const AtomString& value)
> {
> setAttributeWithoutSynchronization(crossoriginAttr, value);
> }
>@@ -226,7 +226,7 @@ String HTMLLinkElement::crossOrigin() const
> return parseCORSSettingsAttribute(attributeWithoutSynchronization(crossoriginAttr));
> }
> 
>-void HTMLLinkElement::setAs(const AtomicString& value)
>+void HTMLLinkElement::setAs(const AtomString& value)
> {
> setAttributeWithoutSynchronization(asAttr, value);
> }
>@@ -565,7 +565,7 @@ URL HTMLLinkElement::href() const
> return document().completeURL(attributeWithoutSynchronization(hrefAttr));
> }
> 
>-const AtomicString& HTMLLinkElement::rel() const
>+const AtomString& HTMLLinkElement::rel() const
> {
> return attributeWithoutSynchronization(relAttr);
> }
>@@ -575,7 +575,7 @@ String HTMLLinkElement::target() const
> return attributeWithoutSynchronization(targetAttr);
> }
> 
>-const AtomicString& HTMLLinkElement::type() const
>+const AtomString& HTMLLinkElement::type() const
> {
> return attributeWithoutSynchronization(typeAttr);
> }
>diff --git a/Source/WebCore/html/HTMLLinkElement.h b/Source/WebCore/html/HTMLLinkElement.h
>index 61ab5b367c2504b0c62c7efb673aaa3c07e50f0b..c83ea397095b919daf07fd40197bfee71a9b8712 100644
>--- a/Source/WebCore/html/HTMLLinkElement.h
>+++ b/Source/WebCore/html/HTMLLinkElement.h
>@@ -48,11 +48,11 @@ public:
> virtual ~HTMLLinkElement();
> 
> URL href() const;
>- const AtomicString& rel() const;
>+ const AtomString& rel() const;
> 
> String target() const final;
> 
>- const AtomicString& type() const;
>+ const AtomString& type() const;
> 
> Optional<LinkIconType> iconType() const;
> 
>@@ -64,9 +64,9 @@ public:
> bool isEnabledViaScript() const { return m_disabledState == EnabledViaScript; }
> DOMTokenList& sizes();
> 
>- WEBCORE_EXPORT void setCrossOrigin(const AtomicString&);
>+ WEBCORE_EXPORT void setCrossOrigin(const AtomString&);
> WEBCORE_EXPORT String crossOrigin() const;
>- WEBCORE_EXPORT void setAs(const AtomicString&);
>+ WEBCORE_EXPORT void setAs(const AtomString&);
> WEBCORE_EXPORT String as() const;
> 
> void dispatchPendingEvent(LinkEventSender*);
>@@ -79,7 +79,7 @@ public:
> #endif
> 
> private:
>- void parseAttribute(const QualifiedName&, const AtomicString&) final;
>+ void parseAttribute(const QualifiedName&, const AtomString&) final;
> 
> bool shouldLoadLink() final;
> void process();
>diff --git a/Source/WebCore/html/HTMLMapElement.cpp b/Source/WebCore/html/HTMLMapElement.cpp
>index 73242d5f2e5934058042ba16102357fb76d3bb4c..f009147ea33a79300bec4a94f3a6a2940a542ef1 100644
>--- a/Source/WebCore/html/HTMLMapElement.cpp
>+++ b/Source/WebCore/html/HTMLMapElement.cpp
>@@ -83,7 +83,7 @@ HTMLImageElement* HTMLMapElement::imageElement()
> return treeScope().imageElementByUsemap(*m_name.impl());
> }
> 
>-void HTMLMapElement::parseAttribute(const QualifiedName& name, const AtomicString& value)
>+void HTMLMapElement::parseAttribute(const QualifiedName& name, const AtomString& value)
> {
> // FIXME: This logic seems wrong for XML documents.
> // Either the id or name will be used depending on the order the attributes are parsed.
>diff --git a/Source/WebCore/html/HTMLMapElement.h b/Source/WebCore/html/HTMLMapElement.h
>index bdf2e4e73acf593ffb6a2b21c290e7964e6d1869..7f7ece5ffda30a704e2dde2f19bae44fa01cb1cb 100644
>--- a/Source/WebCore/html/HTMLMapElement.h
>+++ b/Source/WebCore/html/HTMLMapElement.h
>@@ -36,7 +36,7 @@ public:
> static Ref<HTMLMapElement> create(const QualifiedName&, Document&);
> virtual ~HTMLMapElement();
> 
>- const AtomicString& getName() const { return m_name; }
>+ const AtomString& getName() const { return m_name; }
> 
> bool mapMouseEvent(LayoutPoint location, const LayoutSize&, HitTestResult&);
> 
>@@ -46,12 +46,12 @@ public:
> private:
> HTMLMapElement(const QualifiedName&, Document&);
> 
>- void parseAttribute(const QualifiedName&, const AtomicString&) final;
>+ void parseAttribute(const QualifiedName&, const AtomString&) final;
> 
> InsertedIntoAncestorResult insertedIntoAncestor(InsertionType, ContainerNode&) final;
> void removedFromAncestor(RemovalType, ContainerNode&) final;
> 
>- AtomicString m_name;
>+ AtomString m_name;
> };
> 
> } // namespaces
>diff --git a/Source/WebCore/html/HTMLMarqueeElement.cpp b/Source/WebCore/html/HTMLMarqueeElement.cpp
>index c443992c34d1677b3cb1f07ecb25532b162c1d83..1679e9b22d8f52166eca94fdaf764c4002b6c474 100644
>--- a/Source/WebCore/html/HTMLMarqueeElement.cpp
>+++ b/Source/WebCore/html/HTMLMarqueeElement.cpp
>@@ -68,7 +68,7 @@ bool HTMLMarqueeElement::isPresentationAttribute(const QualifiedName& name) cons
> return HTMLElement::isPresentationAttribute(name);
> }
> 
>-void HTMLMarqueeElement::collectStyleForPresentationAttribute(const QualifiedName& name, const AtomicString& value, MutableStyleProperties& style)
>+void HTMLMarqueeElement::collectStyleForPresentationAttribute(const QualifiedName& name, const AtomString& value, MutableStyleProperties& style)
> {
> if (name == widthAttr) {
> if (!value.isEmpty())
>diff --git a/Source/WebCore/html/HTMLMarqueeElement.h b/Source/WebCore/html/HTMLMarqueeElement.h
>index 68490fd4526295830a29fb6a9b640e6682fd3c5d..040cc954a2a0b3802947b841071fbe22878a1bdf 100644
>--- a/Source/WebCore/html/HTMLMarqueeElement.h
>+++ b/Source/WebCore/html/HTMLMarqueeElement.h
>@@ -55,7 +55,7 @@ private:
> HTMLMarqueeElement(const QualifiedName&, Document&);
> 
> bool isPresentationAttribute(const QualifiedName&) const final;
>- void collectStyleForPresentationAttribute(const QualifiedName&, const AtomicString&, MutableStyleProperties&) final;
>+ void collectStyleForPresentationAttribute(const QualifiedName&, const AtomString&, MutableStyleProperties&) final;
> 
> bool canSuspendForDocumentSuspension() const final;
> void suspend(ReasonForSuspension) final;
>diff --git a/Source/WebCore/html/HTMLMediaElement.cpp b/Source/WebCore/html/HTMLMediaElement.cpp
>index 75f19383ad6145936d4d757f8fbd35fc9948a8ed..24c687e5b21c75ac4cb0a3b772a18c72dedc22a1 100644
>--- a/Source/WebCore/html/HTMLMediaElement.cpp
>+++ b/Source/WebCore/html/HTMLMediaElement.cpp
>@@ -804,7 +804,7 @@ bool HTMLMediaElement::isMouseFocusable() const
> return false;
> }
> 
>-void HTMLMediaElement::parseAttribute(const QualifiedName& name, const AtomicString& value)
>+void HTMLMediaElement::parseAttribute(const QualifiedName& name, const AtomString& value)
> {
> if (name == srcAttr) {
> // https://html.spec.whatwg.org/multipage/embedded-content.html#location-of-the-media-resource
>@@ -1010,7 +1010,7 @@ void HTMLMediaElement::mediaPlayerActiveSourceBuffersChanged(const MediaPlayer*)
> m_hasEverHadVideo |= hasVideo();
> }
> 
>-void HTMLMediaElement::scheduleEvent(const AtomicString& eventName)
>+void HTMLMediaElement::scheduleEvent(const AtomString& eventName)
> {
> auto event = Event::create(eventName, Event::CanBubble::No, Event::IsCancelable::Yes);
> 
>@@ -1121,7 +1121,7 @@ void HTMLMediaElement::setSrcObject(MediaProvider&& mediaProvider)
> prepareForLoad();
> }
> 
>-void HTMLMediaElement::setCrossOrigin(const AtomicString& value)
>+void HTMLMediaElement::setCrossOrigin(const AtomString& value)
> {
> setAttributeWithoutSynchronization(crossoriginAttr, value);
> }
>@@ -5922,7 +5922,7 @@ void HTMLMediaElement::dispatchEvent(Event& event)
> HTMLElement::dispatchEvent(event);
> }
> 
>-bool HTMLMediaElement::addEventListener(const AtomicString& eventType, Ref<EventListener>&& listener, const AddEventListenerOptions& options)
>+bool HTMLMediaElement::addEventListener(const AtomString& eventType, Ref<EventListener>&& listener, const AddEventListenerOptions& options)
> {
> if (eventType != eventNames().webkitplaybacktargetavailabilitychangedEvent)
> return Node::addEventListener(eventType, WTFMove(listener), options);
>@@ -5942,7 +5942,7 @@ bool HTMLMediaElement::addEventListener(const AtomicString& eventType, Ref<Event
> return true;
> }
> 
>-bool HTMLMediaElement::removeEventListener(const AtomicString& eventType, EventListener& listener, const ListenerOptions& options)
>+bool HTMLMediaElement::removeEventListener(const AtomString& eventType, EventListener& listener, const ListenerOptions& options)
> {
> if (eventType != eventNames().webkitplaybacktargetavailabilitychangedEvent)
> return Node::removeEventListener(eventType, listener, options);
>@@ -7875,7 +7875,7 @@ bool HTMLMediaElement::effectiveMuted() const
> return muted() || (document().page() && document().page()->isAudioMuted());
> }
> 
>-bool HTMLMediaElement::doesHaveAttribute(const AtomicString& attribute, AtomicString* value) const
>+bool HTMLMediaElement::doesHaveAttribute(const AtomString& attribute, AtomString* value) const
> {
> QualifiedName attributeName(nullAtom(), attribute, nullAtom());
> 
>diff --git a/Source/WebCore/html/HTMLMediaElement.h b/Source/WebCore/html/HTMLMediaElement.h
>index b6d1809392290378556b311e912998c907ee542b..2f7047efa3874467041ac89806090417f1781b4a 100644
>--- a/Source/WebCore/html/HTMLMediaElement.h
>+++ b/Source/WebCore/html/HTMLMediaElement.h
>@@ -174,7 +174,7 @@ public:
> 
> bool canSaveMediaData() const;
> 
>- bool doesHaveAttribute(const AtomicString&, AtomicString* value = nullptr) const override;
>+ bool doesHaveAttribute(const AtomString&, AtomString* value = nullptr) const override;
> 
> PlatformLayer* platformLayer() const;
> bool isVideoLayerInline();
>@@ -215,7 +215,7 @@ public:
> const MediaProvider& srcObject() const { return m_mediaProvider; }
> void setSrcObject(MediaProvider&&);
> 
>- WEBCORE_EXPORT void setCrossOrigin(const AtomicString&);
>+ WEBCORE_EXPORT void setCrossOrigin(const AtomString&);
> WEBCORE_EXPORT String crossOrigin() const;
> 
> // network state
>@@ -407,8 +407,8 @@ public:
> 
> #if ENABLE(WIRELESS_PLAYBACK_TARGET)
> void webkitShowPlaybackTargetPicker();
>- bool addEventListener(const AtomicString& eventType, Ref<EventListener>&&, const AddEventListenerOptions&) override;
>- bool removeEventListener(const AtomicString& eventType, EventListener&, const ListenerOptions&) override;
>+ bool addEventListener(const AtomString& eventType, Ref<EventListener>&&, const AddEventListenerOptions&) override;
>+ bool removeEventListener(const AtomString& eventType, EventListener&, const ListenerOptions&) override;
> 
> void wirelessRoutesAvailableDidChange() override;
> void setWirelessPlaybackTarget(Ref<MediaPlaybackTarget>&&) override;
>@@ -583,7 +583,7 @@ protected:
> virtual void finishInitialization();
> virtual ~HTMLMediaElement();
> 
>- void parseAttribute(const QualifiedName&, const AtomicString&) override;
>+ void parseAttribute(const QualifiedName&, const AtomString&) override;
> void finishParsingChildren() override;
> bool isURLAttribute(const Attribute&) const override;
> void willAttachRenderers() override;
>@@ -613,7 +613,7 @@ protected:
> void updateMediaControlsAfterPresentationModeChange();
> #endif
> 
>- void scheduleEvent(const AtomicString& eventName);
>+ void scheduleEvent(const AtomString& eventName);
> 
> private:
> void createMediaPlayer();
>diff --git a/Source/WebCore/html/HTMLMenuElement.cpp b/Source/WebCore/html/HTMLMenuElement.cpp
>index ba05bb94fc45291b558a632f3904366bc8ac4e2a..87220ff3380bff4899bc8689641e872b24ec34fc 100644
>--- a/Source/WebCore/html/HTMLMenuElement.cpp
>+++ b/Source/WebCore/html/HTMLMenuElement.cpp
>@@ -64,7 +64,7 @@ void HTMLMenuElement::removedFromAncestor(RemovalType type, ContainerNode& ances
> }
> }
> 
>-void HTMLMenuElement::parseAttribute(const QualifiedName& name, const AtomicString& value)
>+void HTMLMenuElement::parseAttribute(const QualifiedName& name, const AtomString& value)
> {
> if (name != typeAttr || !RuntimeEnabledFeatures::sharedFeatures().menuItemElementEnabled()) {
> HTMLElement::parseAttribute(name, value);
>diff --git a/Source/WebCore/html/HTMLMenuElement.h b/Source/WebCore/html/HTMLMenuElement.h
>index e659f70805376b1bc5f2b31a964ddad09a3a8aa5..205b8f52c49538869a9fed477de12ebffcfde238 100644
>--- a/Source/WebCore/html/HTMLMenuElement.h
>+++ b/Source/WebCore/html/HTMLMenuElement.h
>@@ -38,7 +38,7 @@ private:
> 
> InsertedIntoAncestorResult insertedIntoAncestor(InsertionType, ContainerNode&) final;
> void removedFromAncestor(RemovalType, ContainerNode&) final;
>- void parseAttribute(const QualifiedName&, const AtomicString&) final;
>+ void parseAttribute(const QualifiedName&, const AtomString&) final;
> 
> bool m_isTouchBarMenu;
> };
>diff --git a/Source/WebCore/html/HTMLMetaElement.cpp b/Source/WebCore/html/HTMLMetaElement.cpp
>index 644804909c3c00eb3aa97d38fa3cf7e0c1e74204..af6e6c10311c409299b98b6f62fc8b4fd840a645 100644
>--- a/Source/WebCore/html/HTMLMetaElement.cpp
>+++ b/Source/WebCore/html/HTMLMetaElement.cpp
>@@ -52,7 +52,7 @@ Ref<HTMLMetaElement> HTMLMetaElement::create(const QualifiedName& tagName, Docum
> return adoptRef(*new HTMLMetaElement(tagName, document));
> }
> 
>-void HTMLMetaElement::parseAttribute(const QualifiedName& name, const AtomicString& value)
>+void HTMLMetaElement::parseAttribute(const QualifiedName& name, const AtomString& value)
> {
> if (name == http_equivAttr)
> process();
>@@ -83,7 +83,7 @@ void HTMLMetaElement::process()
> if (!isConnected())
> return;
> 
>- const AtomicString& contentValue = attributeWithoutSynchronization(contentAttr);
>+ const AtomString& contentValue = attributeWithoutSynchronization(contentAttr);
> if (contentValue.isNull())
> return;
> 
>@@ -104,22 +104,22 @@ void HTMLMetaElement::process()
> else if (equalLettersIgnoringASCIICase(name(), "referrer"))
> document().processReferrerPolicy(contentValue, ReferrerPolicySource::MetaTag);
> 
>- const AtomicString& httpEquivValue = attributeWithoutSynchronization(http_equivAttr);
>+ const AtomString& httpEquivValue = attributeWithoutSynchronization(http_equivAttr);
> if (!httpEquivValue.isNull())
> document().processHttpEquiv(httpEquivValue, contentValue, isDescendantOf(document().head()));
> }
> 
>-const AtomicString& HTMLMetaElement::content() const
>+const AtomString& HTMLMetaElement::content() const
> {
> return attributeWithoutSynchronization(contentAttr);
> }
> 
>-const AtomicString& HTMLMetaElement::httpEquiv() const
>+const AtomString& HTMLMetaElement::httpEquiv() const
> {
> return attributeWithoutSynchronization(http_equivAttr);
> }
> 
>-const AtomicString& HTMLMetaElement::name() const
>+const AtomString& HTMLMetaElement::name() const
> {
> return getNameAttribute();
> }
>diff --git a/Source/WebCore/html/HTMLMetaElement.h b/Source/WebCore/html/HTMLMetaElement.h
>index 156e19c6b40ba83edf896b87bb910d14b4dd1234..43e09ef8415993c66272b7542707c021baae8f60 100644
>--- a/Source/WebCore/html/HTMLMetaElement.h
>+++ b/Source/WebCore/html/HTMLMetaElement.h
>@@ -32,14 +32,14 @@ public:
> static Ref<HTMLMetaElement> create(Document&);
> static Ref<HTMLMetaElement> create(const QualifiedName&, Document&);
> 
>- const AtomicString& content() const;
>- const AtomicString& httpEquiv() const;
>- const AtomicString& name() const;
>+ const AtomString& content() const;
>+ const AtomString& httpEquiv() const;
>+ const AtomString& name() const;
> 
> private:
> HTMLMetaElement(const QualifiedName&, Document&);
> 
>- void parseAttribute(const QualifiedName&, const AtomicString&) final;
>+ void parseAttribute(const QualifiedName&, const AtomString&) final;
> InsertedIntoAncestorResult insertedIntoAncestor(InsertionType, ContainerNode&) final;
> void didFinishInsertingNode();
> 
>diff --git a/Source/WebCore/html/HTMLMeterElement.cpp b/Source/WebCore/html/HTMLMeterElement.cpp
>index bdc71836073ca3a4a608e0e2f54a1b706e0b03af..c52c471e18e67aa36007df862ea31f97938e8878 100644
>--- a/Source/WebCore/html/HTMLMeterElement.cpp
>+++ b/Source/WebCore/html/HTMLMeterElement.cpp
>@@ -71,7 +71,7 @@ bool HTMLMeterElement::childShouldCreateRenderer(const Node& child) const
> return !is<RenderMeter>(renderer()) && HTMLElement::childShouldCreateRenderer(child);
> }
> 
>-void HTMLMeterElement::parseAttribute(const QualifiedName& name, const AtomicString& value)
>+void HTMLMeterElement::parseAttribute(const QualifiedName& name, const AtomString& value)
> {
> if (name == valueAttr || name == minAttr || name == maxAttr || name == lowAttr || name == highAttr || name == optimumAttr)
> didElementStateChange();
>@@ -86,7 +86,7 @@ double HTMLMeterElement::min() const
> 
> void HTMLMeterElement::setMin(double min)
> {
>- setAttributeWithoutSynchronization(minAttr, AtomicString::number(min));
>+ setAttributeWithoutSynchronization(minAttr, AtomString::number(min));
> }
> 
> double HTMLMeterElement::max() const
>@@ -96,7 +96,7 @@ double HTMLMeterElement::max() const
> 
> void HTMLMeterElement::setMax(double max)
> {
>- setAttributeWithoutSynchronization(maxAttr, AtomicString::number(max));
>+ setAttributeWithoutSynchronization(maxAttr, AtomString::number(max));
> }
> 
> double HTMLMeterElement::value() const
>@@ -107,7 +107,7 @@ double HTMLMeterElement::value() const
> 
> void HTMLMeterElement::setValue(double value)
> {
>- setAttributeWithoutSynchronization(valueAttr, AtomicString::number(value));
>+ setAttributeWithoutSynchronization(valueAttr, AtomString::number(value));
> }
> 
> double HTMLMeterElement::low() const
>@@ -118,7 +118,7 @@ double HTMLMeterElement::low() const
> 
> void HTMLMeterElement::setLow(double low)
> {
>- setAttributeWithoutSynchronization(lowAttr, AtomicString::number(low));
>+ setAttributeWithoutSynchronization(lowAttr, AtomString::number(low));
> }
> 
> double HTMLMeterElement::high() const
>@@ -129,7 +129,7 @@ double HTMLMeterElement::high() const
> 
> void HTMLMeterElement::setHigh(double high)
> {
>- setAttributeWithoutSynchronization(highAttr, AtomicString::number(high));
>+ setAttributeWithoutSynchronization(highAttr, AtomString::number(high));
> }
> 
> double HTMLMeterElement::optimum() const
>@@ -140,7 +140,7 @@ double HTMLMeterElement::optimum() const
> 
> void HTMLMeterElement::setOptimum(double optimum)
> {
>- setAttributeWithoutSynchronization(optimumAttr, AtomicString::number(optimum));
>+ setAttributeWithoutSynchronization(optimumAttr, AtomString::number(optimum));
> }
> 
> HTMLMeterElement::GaugeRegion HTMLMeterElement::gaugeRegion() const
>diff --git a/Source/WebCore/html/HTMLMeterElement.h b/Source/WebCore/html/HTMLMeterElement.h
>index ae16f827b5602238da2344fdc845ac5661157228..fe2ceaf3e214c0712182ec1cbe78424438b37fdb 100644
>--- a/Source/WebCore/html/HTMLMeterElement.h
>+++ b/Source/WebCore/html/HTMLMeterElement.h
>@@ -73,7 +73,7 @@ private:
> 
> RenderPtr<RenderElement> createElementRenderer(RenderStyle&&, const RenderTreePosition&) final;
> bool childShouldCreateRenderer(const Node&) const final;
>- void parseAttribute(const QualifiedName&, const AtomicString&) final;
>+ void parseAttribute(const QualifiedName&, const AtomString&) final;
> 
> void didElementStateChange();
> void didAddUserAgentShadowRoot(ShadowRoot&) final;
>diff --git a/Source/WebCore/html/HTMLNameCollection.cpp b/Source/WebCore/html/HTMLNameCollection.cpp
>index cb8a15c2c9a8f5475f1a006a07db4ee1ccf97a1c..acc1dac7f1a8cabaca29f7f24cec0700e238ac28 100644
>--- a/Source/WebCore/html/HTMLNameCollection.cpp
>+++ b/Source/WebCore/html/HTMLNameCollection.cpp
>@@ -51,7 +51,7 @@ bool WindowNameCollection::elementMatchesIfNameAttributeMatch(const Element& ele
> || is<HTMLObjectElement>(element);
> }
> 
>-bool WindowNameCollection::elementMatches(const Element& element, const AtomicStringImpl* name)
>+bool WindowNameCollection::elementMatches(const Element& element, const AtomStringImpl* name)
> {
> // Find only images, forms, applets, embeds and objects by name, but anything by id.
> return (elementMatchesIfNameAttributeMatch(element) && element.getNameAttribute().impl() == name)
>@@ -81,7 +81,7 @@ bool DocumentNameCollection::elementMatchesIfNameAttributeMatch(const Element& e
> || is<HTMLImageElement>(element);
> }
> 
>-bool DocumentNameCollection::elementMatches(const Element& element, const AtomicStringImpl* name)
>+bool DocumentNameCollection::elementMatches(const Element& element, const AtomStringImpl* name)
> {
> // Find images, forms, applets, embeds, objects and iframes by name, applets and object by id, and images by id
> // but only if they have a name attribute (this very strange rule matches IE).
>diff --git a/Source/WebCore/html/HTMLNameCollection.h b/Source/WebCore/html/HTMLNameCollection.h
>index 4588899400551b922a4b31a56e93373f487c9ce5..9b5ac5cef87eeda3d3dac9b6b14e27a707230df5 100644
>--- a/Source/WebCore/html/HTMLNameCollection.h
>+++ b/Source/WebCore/html/HTMLNameCollection.h
>@@ -25,7 +25,7 @@
> #include "CachedHTMLCollection.h"
> #include "NodeRareData.h"
> #include <wtf/IsoMalloc.h>
>-#include <wtf/text/AtomicString.h>
>+#include <wtf/text/AtomString.h>
> 
> namespace WebCore {
> 
>@@ -40,13 +40,13 @@ public:
> Document& document() { return downcast<Document>(this->ownerNode()); }
> 
> protected:
>- HTMLNameCollection(Document&, CollectionType, const AtomicString& name);
>+ HTMLNameCollection(Document&, CollectionType, const AtomString& name);
> 
>- AtomicString m_name;
>+ AtomString m_name;
> };
> 
> template <typename HTMLCollectionClass, CollectionTraversalType traversalType>
>-HTMLNameCollection<HTMLCollectionClass, traversalType>::HTMLNameCollection(Document& document, CollectionType type, const AtomicString& name)
>+HTMLNameCollection<HTMLCollectionClass, traversalType>::HTMLNameCollection(Document& document, CollectionType type, const AtomString& name)
> : CachedHTMLCollection<HTMLCollectionClass, traversalType>(document, type)
> , m_name(name)
> {
>@@ -63,7 +63,7 @@ HTMLNameCollection<HTMLCollectionClass, traversalType>::~HTMLNameCollection()
> class WindowNameCollection final : public HTMLNameCollection<WindowNameCollection, CollectionTraversalType::Descendants> {
> WTF_MAKE_ISO_ALLOCATED(WindowNameCollection);
> public:
>- static Ref<WindowNameCollection> create(Document& document, CollectionType type, const AtomicString& name)
>+ static Ref<WindowNameCollection> create(Document& document, CollectionType type, const AtomString& name)
> {
> return adoptRef(*new WindowNameCollection(document, type, name));
> }
>@@ -73,10 +73,10 @@ public:
> 
> static bool elementMatchesIfIdAttributeMatch(const Element&) { return true; }
> static bool elementMatchesIfNameAttributeMatch(const Element&);
>- static bool elementMatches(const Element&, const AtomicStringImpl*);
>+ static bool elementMatches(const Element&, const AtomStringImpl*);
> 
> private:
>- WindowNameCollection(Document& document, CollectionType type, const AtomicString& name)
>+ WindowNameCollection(Document& document, CollectionType type, const AtomString& name)
> : HTMLNameCollection<WindowNameCollection, CollectionTraversalType::Descendants>(document, type, name)
> {
> ASSERT(type == WindowNamedItems);
>@@ -86,7 +86,7 @@ private:
> class DocumentNameCollection final : public HTMLNameCollection<DocumentNameCollection, CollectionTraversalType::Descendants> {
> WTF_MAKE_ISO_ALLOCATED(DocumentNameCollection);
> public:
>- static Ref<DocumentNameCollection> create(Document& document, CollectionType type, const AtomicString& name)
>+ static Ref<DocumentNameCollection> create(Document& document, CollectionType type, const AtomString& name)
> {
> return adoptRef(*new DocumentNameCollection(document, type, name));
> }
>@@ -97,10 +97,10 @@ public:
> // For CachedHTMLCollection.
> bool elementMatches(const Element& element) const { return elementMatches(element, m_name.impl()); }
> 
>- static bool elementMatches(const Element&, const AtomicStringImpl*);
>+ static bool elementMatches(const Element&, const AtomStringImpl*);
> 
> private:
>- DocumentNameCollection(Document& document, CollectionType type, const AtomicString& name)
>+ DocumentNameCollection(Document& document, CollectionType type, const AtomString& name)
> : HTMLNameCollection<DocumentNameCollection, CollectionTraversalType::Descendants>(document, type, name)
> {
> ASSERT(type == DocumentNamedItems);
>diff --git a/Source/WebCore/html/HTMLOListElement.cpp b/Source/WebCore/html/HTMLOListElement.cpp
>index 4cd8659e59c4aed0a08f3e5961c5adcc64b7cebd..be8cb5a98f87ba31b86623b6cdb0268e3c0ec82c 100644
>--- a/Source/WebCore/html/HTMLOListElement.cpp
>+++ b/Source/WebCore/html/HTMLOListElement.cpp
>@@ -66,7 +66,7 @@ bool HTMLOListElement::isPresentationAttribute(const QualifiedName& name) const
> return HTMLElement::isPresentationAttribute(name);
> }
> 
>-void HTMLOListElement::collectStyleForPresentationAttribute(const QualifiedName& name, const AtomicString& value, MutableStyleProperties& style)
>+void HTMLOListElement::collectStyleForPresentationAttribute(const QualifiedName& name, const AtomString& value, MutableStyleProperties& style)
> {
> if (name == typeAttr) {
> if (value == "a")
>@@ -83,7 +83,7 @@ void HTMLOListElement::collectStyleForPresentationAttribute(const QualifiedName&
> HTMLElement::collectStyleForPresentationAttribute(name, value, style);
> }
> 
>-void HTMLOListElement::parseAttribute(const QualifiedName& name, const AtomicString& value)
>+void HTMLOListElement::parseAttribute(const QualifiedName& name, const AtomString& value)
> {
> if (name == startAttr) {
> int oldStart = start();
>diff --git a/Source/WebCore/html/HTMLOListElement.h b/Source/WebCore/html/HTMLOListElement.h
>index 813f5e062db25b54319acd325599b000f959c954..f305ca59b9961d6ec92d624a1a8866488f03cbed 100644
>--- a/Source/WebCore/html/HTMLOListElement.h
>+++ b/Source/WebCore/html/HTMLOListElement.h
>@@ -48,9 +48,9 @@ private:
> 
> WEBCORE_EXPORT unsigned itemCount() const;
> 
>- void parseAttribute(const QualifiedName&, const AtomicString&) final;
>+ void parseAttribute(const QualifiedName&, const AtomString&) final;
> bool isPresentationAttribute(const QualifiedName&) const final;
>- void collectStyleForPresentationAttribute(const QualifiedName&, const AtomicString&, MutableStyleProperties&) final;
>+ void collectStyleForPresentationAttribute(const QualifiedName&, const AtomString&, MutableStyleProperties&) final;
> 
> Optional<int> m_start;
> mutable Optional<unsigned> m_itemCount;
>diff --git a/Source/WebCore/html/HTMLObjectElement.cpp b/Source/WebCore/html/HTMLObjectElement.cpp
>index 797783ba86ecbdb7a0ace2c6cb3665c4ed52d566..31ea9c2ed6a173af01c3da0c2eff38be2f9d9818 100644
>--- a/Source/WebCore/html/HTMLObjectElement.cpp
>+++ b/Source/WebCore/html/HTMLObjectElement.cpp
>@@ -93,7 +93,7 @@ bool HTMLObjectElement::isPresentationAttribute(const QualifiedName& name) const
> return HTMLPlugInImageElement::isPresentationAttribute(name);
> }
> 
>-void HTMLObjectElement::collectStyleForPresentationAttribute(const QualifiedName& name, const AtomicString& value, MutableStyleProperties& style)
>+void HTMLObjectElement::collectStyleForPresentationAttribute(const QualifiedName& name, const AtomString& value, MutableStyleProperties& style)
> {
> if (name == borderAttr)
> applyBorderAttributeToStyle(value, style);
>@@ -101,7 +101,7 @@ void HTMLObjectElement::collectStyleForPresentationAttribute(const QualifiedName
> HTMLPlugInImageElement::collectStyleForPresentationAttribute(name, value, style);
> }
> 
>-void HTMLObjectElement::parseAttribute(const QualifiedName& name, const AtomicString& value)
>+void HTMLObjectElement::parseAttribute(const QualifiedName& name, const AtomString& value)
> {
> bool invalidateRenderer = false;
> 
>@@ -190,7 +190,7 @@ void HTMLObjectElement::parametersForPlugin(Vector<String>& paramNames, Vector<S
> // Turn the attributes of the <object> element into arrays, but don't override <param> values.
> if (hasAttributes()) {
> for (const Attribute& attribute : attributesIterator()) {
>- const AtomicString& name = attribute.name().localName();
>+ const AtomString& name = attribute.name().localName();
> if (!uniqueParamNames.contains(name.impl())) {
> paramNames.append(name.string());
> paramValues.append(attribute.value().string());
>@@ -324,7 +324,7 @@ bool HTMLObjectElement::isURLAttribute(const Attribute& attribute) const
> return attribute.name() == dataAttr || attribute.name() == codebaseAttr || (attribute.name() == usemapAttr && attribute.value().string()[0] != '#') || HTMLPlugInImageElement::isURLAttribute(attribute);
> }
> 
>-const AtomicString& HTMLObjectElement::imageSourceURL() const
>+const AtomString& HTMLObjectElement::imageSourceURL() const
> {
> return attributeWithoutSynchronization(dataAttr);
> }
>@@ -457,7 +457,7 @@ void HTMLObjectElement::addSubresourceAttributeURLs(ListHashSet<URL>& urls) cons
> 
> // FIXME: Passing a string that starts with "#" to the completeURL function does
> // not seem like it would work. The image element has similar but not identical code.
>- const AtomicString& useMap = attributeWithoutSynchronization(usemapAttr);
>+ const AtomString& useMap = attributeWithoutSynchronization(usemapAttr);
> if (useMap.startsWith('#'))
> addSubresourceURL(urls, document().completeURL(useMap));
> }
>diff --git a/Source/WebCore/html/HTMLObjectElement.h b/Source/WebCore/html/HTMLObjectElement.h
>index bbbbc858a73ce9bf746b637019bf4e8ad4e5d913..1d6f285111a923ab99d624e432860c0012410114 100644
>--- a/Source/WebCore/html/HTMLObjectElement.h
>+++ b/Source/WebCore/html/HTMLObjectElement.h
>@@ -59,9 +59,9 @@ public:
> private:
> HTMLObjectElement(const QualifiedName&, Document&, HTMLFormElement*);
> 
>- void parseAttribute(const QualifiedName&, const AtomicString&) final;
>+ void parseAttribute(const QualifiedName&, const AtomString&) final;
> bool isPresentationAttribute(const QualifiedName&) const final;
>- void collectStyleForPresentationAttribute(const QualifiedName&, const AtomicString&, MutableStyleProperties&) final;
>+ void collectStyleForPresentationAttribute(const QualifiedName&, const AtomString&, MutableStyleProperties&) final;
> 
> InsertedIntoAncestorResult insertedIntoAncestor(InsertionType, ContainerNode&) final;
> void didFinishInsertingNode() final;
>@@ -72,7 +72,7 @@ private:
> void childrenChanged(const ChildChange&) final;
> 
> bool isURLAttribute(const Attribute&) const final;
>- const AtomicString& imageSourceURL() const final;
>+ const AtomString& imageSourceURL() const final;
> 
> RenderWidget* renderWidgetLoadingPlugin() const final;
> 
>diff --git a/Source/WebCore/html/HTMLOptGroupElement.cpp b/Source/WebCore/html/HTMLOptGroupElement.cpp
>index 7387dd0321b861451de125204b42b1eac012d021..9e8cffdb91a51090428459effe865a48e07f4808 100644
>--- a/Source/WebCore/html/HTMLOptGroupElement.cpp
>+++ b/Source/WebCore/html/HTMLOptGroupElement.cpp
>@@ -66,9 +66,9 @@ bool HTMLOptGroupElement::isFocusable() const
> return style && style->display() != DisplayType::None;
> }
> 
>-const AtomicString& HTMLOptGroupElement::formControlType() const
>+const AtomString& HTMLOptGroupElement::formControlType() const
> {
>- static NeverDestroyed<const AtomicString> optgroup("optgroup", AtomicString::ConstructFromLiteral);
>+ static NeverDestroyed<const AtomString> optgroup("optgroup", AtomString::ConstructFromLiteral);
> return optgroup;
> }
> 
>@@ -78,7 +78,7 @@ void HTMLOptGroupElement::childrenChanged(const ChildChange& change)
> HTMLElement::childrenChanged(change);
> }
> 
>-void HTMLOptGroupElement::parseAttribute(const QualifiedName& name, const AtomicString& value)
>+void HTMLOptGroupElement::parseAttribute(const QualifiedName& name, const AtomString& value)
> {
> HTMLElement::parseAttribute(name, value);
> recalcSelectOptions();
>diff --git a/Source/WebCore/html/HTMLOptGroupElement.h b/Source/WebCore/html/HTMLOptGroupElement.h
>index 2f88a73cfd716af5dd6dec10f0c1ba198b64f7b0..a233b3504da3e377f794798533deb69fdc7d2aa1 100644
>--- a/Source/WebCore/html/HTMLOptGroupElement.h
>+++ b/Source/WebCore/html/HTMLOptGroupElement.h
>@@ -42,9 +42,9 @@ public:
> private:
> HTMLOptGroupElement(const QualifiedName&, Document&);
> 
>- const AtomicString& formControlType() const;
>+ const AtomString& formControlType() const;
> bool isFocusable() const final;
>- void parseAttribute(const QualifiedName&, const AtomicString&) final;
>+ void parseAttribute(const QualifiedName&, const AtomString&) final;
> bool rendererIsNeeded(const RenderStyle&) final { return false; }
> 
> void childrenChanged(const ChildChange&) final;
>diff --git a/Source/WebCore/html/HTMLOptionElement.cpp b/Source/WebCore/html/HTMLOptionElement.cpp
>index df9b1dd1e51d66fb1764bcea38ecb0ada54639dd..c3dd30d5dc62bf831709e57004688d4a88b3e2a6 100644
>--- a/Source/WebCore/html/HTMLOptionElement.cpp
>+++ b/Source/WebCore/html/HTMLOptionElement.cpp
>@@ -162,7 +162,7 @@ int HTMLOptionElement::index() const
> return 0;
> }
> 
>-void HTMLOptionElement::parseAttribute(const QualifiedName& name, const AtomicString& value)
>+void HTMLOptionElement::parseAttribute(const QualifiedName& name, const AtomString& value)
> {
> #if ENABLE(DATALIST_ELEMENT)
> if (name == valueAttr) {
>@@ -194,7 +194,7 @@ void HTMLOptionElement::parseAttribute(const QualifiedName& name, const AtomicSt
> 
> String HTMLOptionElement::value() const
> {
>- const AtomicString& value = attributeWithoutSynchronization(valueAttr);
>+ const AtomString& value = attributeWithoutSynchronization(valueAttr);
> if (!value.isNull())
> return value;
> return stripLeadingAndTrailingHTMLSpaces(collectOptionInnerText()).simplifyWhiteSpace(isHTMLSpace);
>diff --git a/Source/WebCore/html/HTMLOptionElement.h b/Source/WebCore/html/HTMLOptionElement.h
>index 7b27fbde83953c5144d5c0811c4eb7e7a7c23201..f0d94c8a6b5f308334eaa11da9e4021b5c0e57e6 100644
>--- a/Source/WebCore/html/HTMLOptionElement.h
>+++ b/Source/WebCore/html/HTMLOptionElement.h
>@@ -73,7 +73,7 @@ private:
> bool rendererIsNeeded(const RenderStyle&) final { return false; }
> bool matchesDefaultPseudoClass() const final;
> 
>- void parseAttribute(const QualifiedName&, const AtomicString&) final;
>+ void parseAttribute(const QualifiedName&, const AtomString&) final;
> 
> InsertedIntoAncestorResult insertedIntoAncestor(InsertionType, ContainerNode&) final;
> void accessKeyAction(bool) final;
>diff --git a/Source/WebCore/html/HTMLOptionsCollection.h b/Source/WebCore/html/HTMLOptionsCollection.h
>index a3c11d6b6d0241bbd204691960defec23f20cc43..67652e9b494a63e12a77df9f5c5d14b40ec6116e 100644
>--- a/Source/WebCore/html/HTMLOptionsCollection.h
>+++ b/Source/WebCore/html/HTMLOptionsCollection.h
>@@ -40,7 +40,7 @@ public:
> const HTMLSelectElement& selectElement() const { return downcast<HTMLSelectElement>(ownerNode()); }
> 
> HTMLOptionElement* item(unsigned offset) const final;
>- HTMLOptionElement* namedItem(const AtomicString& name) const final;
>+ HTMLOptionElement* namedItem(const AtomString& name) const final;
> 
> ExceptionOr<void> setItem(unsigned index, HTMLOptionElement*);
> 
>@@ -66,7 +66,7 @@ inline HTMLOptionElement* HTMLOptionsCollection::item(unsigned offset) const
> return downcast<HTMLOptionElement>(Base::item(offset));
> }
> 
>-inline HTMLOptionElement* HTMLOptionsCollection::namedItem(const AtomicString& name) const
>+inline HTMLOptionElement* HTMLOptionsCollection::namedItem(const AtomString& name) const
> {
> return downcast<HTMLOptionElement>(Base::namedItem(name));
> }
>diff --git a/Source/WebCore/html/HTMLOutputElement.cpp b/Source/WebCore/html/HTMLOutputElement.cpp
>index f30d9dafdce29f9e43f305bd9ff41186f2324bd8..dd4fa2d70e4f43f42b8222d37d4418f1a131ed87 100644
>--- a/Source/WebCore/html/HTMLOutputElement.cpp
>+++ b/Source/WebCore/html/HTMLOutputElement.cpp
>@@ -55,9 +55,9 @@ Ref<HTMLOutputElement> HTMLOutputElement::create(const QualifiedName& tagName, D
> return adoptRef(*new HTMLOutputElement(tagName, document, form));
> }
> 
>-const AtomicString& HTMLOutputElement::formControlType() const
>+const AtomString& HTMLOutputElement::formControlType() const
> {
>- static NeverDestroyed<const AtomicString> output("output", AtomicString::ConstructFromLiteral);
>+ static NeverDestroyed<const AtomString> output("output", AtomString::ConstructFromLiteral);
> return output;
> }
> 
>@@ -66,7 +66,7 @@ bool HTMLOutputElement::supportsFocus() const
> return HTMLElement::supportsFocus();
> }
> 
>-void HTMLOutputElement::parseAttribute(const QualifiedName& name, const AtomicString& value)
>+void HTMLOutputElement::parseAttribute(const QualifiedName& name, const AtomString& value)
> {
> if (name == forAttr) {
> if (m_tokens)
>diff --git a/Source/WebCore/html/HTMLOutputElement.h b/Source/WebCore/html/HTMLOutputElement.h
>index 0a72e45c49e886b4386b086e594556438b2ba86c..5034b0231396644cdc0474cddccb1039098f40dd 100644
>--- a/Source/WebCore/html/HTMLOutputElement.h
>+++ b/Source/WebCore/html/HTMLOutputElement.h
>@@ -52,8 +52,8 @@ private:
> HTMLOutputElement(const QualifiedName&, Document&, HTMLFormElement*);
> 
> bool computeWillValidate() const final { return false; }
>- void parseAttribute(const QualifiedName&, const AtomicString&) final;
>- const AtomicString& formControlType() const final;
>+ void parseAttribute(const QualifiedName&, const AtomString&) final;
>+ const AtomString& formControlType() const final;
> bool isEnumeratable() const final { return true; }
> bool supportLabels() const final { return true; }
> bool supportsFocus() const final;
>diff --git a/Source/WebCore/html/HTMLParagraphElement.cpp b/Source/WebCore/html/HTMLParagraphElement.cpp
>index 01c6bae817803e69a7eaf4031d13d23f0e8e3e37..efa9d7ad1e14439eaa1ef62dc62a804164b0d8c5 100644
>--- a/Source/WebCore/html/HTMLParagraphElement.cpp
>+++ b/Source/WebCore/html/HTMLParagraphElement.cpp
>@@ -51,7 +51,7 @@ Ref<HTMLParagraphElement> HTMLParagraphElement::create(const QualifiedName& tagN
> return adoptRef(*new HTMLParagraphElement(tagName, document));
> }
> 
>-void HTMLParagraphElement::collectStyleForPresentationAttribute(const QualifiedName& name, const AtomicString& value, MutableStyleProperties& style)
>+void HTMLParagraphElement::collectStyleForPresentationAttribute(const QualifiedName& name, const AtomString& value, MutableStyleProperties& style)
> {
> if (name == alignAttr) {
> if (equalLettersIgnoringASCIICase(value, "middle") || equalLettersIgnoringASCIICase(value, "center"))
>diff --git a/Source/WebCore/html/HTMLParagraphElement.h b/Source/WebCore/html/HTMLParagraphElement.h
>index ad701d44771089a2b70ac13a3e36d9db1f661382..dc3aa8b9548a9087ab8a07db747e8f5522a8a1cc 100644
>--- a/Source/WebCore/html/HTMLParagraphElement.h
>+++ b/Source/WebCore/html/HTMLParagraphElement.h
>@@ -35,7 +35,7 @@ public:
> private:
> HTMLParagraphElement(const QualifiedName&, Document&);
> 
>- void collectStyleForPresentationAttribute(const QualifiedName&, const AtomicString&, MutableStyleProperties&) final;
>+ void collectStyleForPresentationAttribute(const QualifiedName&, const AtomString&, MutableStyleProperties&) final;
> };
> 
> } // namespace WebCore
>diff --git a/Source/WebCore/html/HTMLPlugInElement.cpp b/Source/WebCore/html/HTMLPlugInElement.cpp
>index 653bbae4ff38fe50ab7ccc6cde857cd860aa5dcc..6532462bfbe13584a9b6ab2df3f4b6e404f57339 100644
>--- a/Source/WebCore/html/HTMLPlugInElement.cpp
>+++ b/Source/WebCore/html/HTMLPlugInElement.cpp
>@@ -165,7 +165,7 @@ bool HTMLPlugInElement::isPresentationAttribute(const QualifiedName& name) const
> return HTMLFrameOwnerElement::isPresentationAttribute(name);
> }
> 
>-void HTMLPlugInElement::collectStyleForPresentationAttribute(const QualifiedName& name, const AtomicString& value, MutableStyleProperties& style)
>+void HTMLPlugInElement::collectStyleForPresentationAttribute(const QualifiedName& name, const AtomString& value, MutableStyleProperties& style)
> {
> if (name == widthAttr)
> addHTMLLengthToStyle(style, CSSPropertyWidth, value);
>diff --git a/Source/WebCore/html/HTMLPlugInElement.h b/Source/WebCore/html/HTMLPlugInElement.h
>index c42c0d3f0cf47258a112a5edf58da6bbaed42fc7..57c5c21daa56a83c8709ac1f82e3d8501bbada39 100644
>--- a/Source/WebCore/html/HTMLPlugInElement.h
>+++ b/Source/WebCore/html/HTMLPlugInElement.h
>@@ -95,7 +95,7 @@ protected:
> 
> void willDetachRenderers() override;
> bool isPresentationAttribute(const QualifiedName&) const override;
>- void collectStyleForPresentationAttribute(const QualifiedName&, const AtomicString&, MutableStyleProperties&) override;
>+ void collectStyleForPresentationAttribute(const QualifiedName&, const AtomString&, MutableStyleProperties&) override;
> 
> virtual bool useFallbackContent() const { return false; }
> 
>diff --git a/Source/WebCore/html/HTMLPlugInImageElement.cpp b/Source/WebCore/html/HTMLPlugInImageElement.cpp
>index 31ab1c2724e5aae43810724639d410eaab152551..7f6289acbc10193fce85d45bd2e3459e86c04a8a 100644
>--- a/Source/WebCore/html/HTMLPlugInImageElement.cpp
>+++ b/Source/WebCore/html/HTMLPlugInImageElement.cpp
>@@ -414,7 +414,7 @@ void HTMLPlugInImageElement::didAddUserAgentShadowRoot(ShadowRoot& root)
> 
> bool HTMLPlugInImageElement::partOfSnapshotOverlay(const EventTarget* target) const
> {
>- static NeverDestroyed<AtomicString> selector(".snapshot-overlay", AtomicString::ConstructFromLiteral);
>+ static NeverDestroyed<AtomString> selector(".snapshot-overlay", AtomString::ConstructFromLiteral);
> auto shadow = userAgentShadowRoot();
> if (!shadow)
> return false;
>diff --git a/Source/WebCore/html/HTMLPreElement.cpp b/Source/WebCore/html/HTMLPreElement.cpp
>index 5cf319da007e356bb784deb632afefb4c48fe049..c8b4f7ac3d0842a3ddb8006ad75531307241a7b5 100644
>--- a/Source/WebCore/html/HTMLPreElement.cpp
>+++ b/Source/WebCore/html/HTMLPreElement.cpp
>@@ -52,7 +52,7 @@ bool HTMLPreElement::isPresentationAttribute(const QualifiedName& name) const
> return HTMLElement::isPresentationAttribute(name);
> }
> 
>-void HTMLPreElement::collectStyleForPresentationAttribute(const QualifiedName& name, const AtomicString& value, MutableStyleProperties& style)
>+void HTMLPreElement::collectStyleForPresentationAttribute(const QualifiedName& name, const AtomString& value, MutableStyleProperties& style)
> {
> if (name == wrapAttr)
> style.setProperty(CSSPropertyWhiteSpace, CSSValuePreWrap);
>diff --git a/Source/WebCore/html/HTMLPreElement.h b/Source/WebCore/html/HTMLPreElement.h
>index 70db482ce63d72f6f8da8de6c45915ca0cd2f8f2..ddcdc56bb6592714f75d614d857cc5556b90d74f 100644
>--- a/Source/WebCore/html/HTMLPreElement.h
>+++ b/Source/WebCore/html/HTMLPreElement.h
>@@ -35,7 +35,7 @@ private:
> HTMLPreElement(const QualifiedName&, Document&);
> 
> bool isPresentationAttribute(const QualifiedName&) const final;
>- void collectStyleForPresentationAttribute(const QualifiedName&, const AtomicString&, MutableStyleProperties&) final;
>+ void collectStyleForPresentationAttribute(const QualifiedName&, const AtomString&, MutableStyleProperties&) final;
> };
> 
> } // namespace WebCore
>diff --git a/Source/WebCore/html/HTMLProgressElement.cpp b/Source/WebCore/html/HTMLProgressElement.cpp
>index c2e750e9a278824ded83c528358a0c9f9fa048fa..6343abb59f6084bf4e4809c172439790fad8cffd 100644
>--- a/Source/WebCore/html/HTMLProgressElement.cpp
>+++ b/Source/WebCore/html/HTMLProgressElement.cpp
>@@ -75,7 +75,7 @@ RenderProgress* HTMLProgressElement::renderProgress() const
> return downcast<RenderProgress>(descendantsOfType<Element>(*userAgentShadowRoot()).first()->renderer());
> }
> 
>-void HTMLProgressElement::parseAttribute(const QualifiedName& name, const AtomicString& value)
>+void HTMLProgressElement::parseAttribute(const QualifiedName& name, const AtomString& value)
> {
> if (name == valueAttr)
> didElementStateChange();
>@@ -99,7 +99,7 @@ double HTMLProgressElement::value() const
> 
> void HTMLProgressElement::setValue(double value)
> {
>- setAttributeWithoutSynchronization(valueAttr, AtomicString::number(value));
>+ setAttributeWithoutSynchronization(valueAttr, AtomString::number(value));
> }
> 
> double HTMLProgressElement::max() const
>@@ -111,7 +111,7 @@ double HTMLProgressElement::max() const
> void HTMLProgressElement::setMax(double max)
> {
> if (max > 0)
>- setAttributeWithoutSynchronization(maxAttr, AtomicString::number(max));
>+ setAttributeWithoutSynchronization(maxAttr, AtomString::number(max));
> }
> 
> double HTMLProgressElement::position() const
>diff --git a/Source/WebCore/html/HTMLProgressElement.h b/Source/WebCore/html/HTMLProgressElement.h
>index d1fa08c69d46618e0f2f5589c353ba802e5cb152..4fb0e7a3c38c6e584f59343ca7178a8fb019efab 100644
>--- a/Source/WebCore/html/HTMLProgressElement.h
>+++ b/Source/WebCore/html/HTMLProgressElement.h
>@@ -54,7 +54,7 @@ private:
> bool childShouldCreateRenderer(const Node&) const final;
> RenderProgress* renderProgress() const;
> 
>- void parseAttribute(const QualifiedName&, const AtomicString&) final;
>+ void parseAttribute(const QualifiedName&, const AtomString&) final;
> 
> void didAttachRenderers() final;
> 
>diff --git a/Source/WebCore/html/HTMLScriptElement.cpp b/Source/WebCore/html/HTMLScriptElement.cpp
>index 60610984024c18dcceeb02a78c380d946feeaa74..f40d57d2fb4e31e6b80094ab44cde1387e924d31 100644
>--- a/Source/WebCore/html/HTMLScriptElement.cpp
>+++ b/Source/WebCore/html/HTMLScriptElement.cpp
>@@ -61,7 +61,7 @@ void HTMLScriptElement::childrenChanged(const ChildChange& change)
> ScriptElement::childrenChanged(change);
> }
> 
>-void HTMLScriptElement::parseAttribute(const QualifiedName& name, const AtomicString& value)
>+void HTMLScriptElement::parseAttribute(const QualifiedName& name, const AtomString& value)
> {
> if (name == srcAttr)
> handleSourceAttribute(value);
>@@ -99,7 +99,7 @@ bool HTMLScriptElement::async() const
> return hasAttributeWithoutSynchronization(asyncAttr) || forceAsync();
> }
> 
>-void HTMLScriptElement::setCrossOrigin(const AtomicString& value)
>+void HTMLScriptElement::setCrossOrigin(const AtomString& value)
> {
> setAttributeWithoutSynchronization(crossoriginAttr, value);
> }
>diff --git a/Source/WebCore/html/HTMLScriptElement.h b/Source/WebCore/html/HTMLScriptElement.h
>index bd1e3ed2f25ede6d92398715d7914793fde0f516..5faec2cc273c063c5467da77de7860577fb0c3bd 100644
>--- a/Source/WebCore/html/HTMLScriptElement.h
>+++ b/Source/WebCore/html/HTMLScriptElement.h
>@@ -41,7 +41,7 @@ public:
> WEBCORE_EXPORT void setAsync(bool);
> WEBCORE_EXPORT bool async() const;
> 
>- WEBCORE_EXPORT void setCrossOrigin(const AtomicString&);
>+ WEBCORE_EXPORT void setCrossOrigin(const AtomString&);
> WEBCORE_EXPORT String crossOrigin() const;
> 
> using HTMLElement::ref;
>@@ -50,7 +50,7 @@ public:
> private:
> HTMLScriptElement(const QualifiedName&, Document&, bool wasInsertedByParser, bool alreadyStarted);
> 
>- void parseAttribute(const QualifiedName&, const AtomicString&) final;
>+ void parseAttribute(const QualifiedName&, const AtomString&) final;
> InsertedIntoAncestorResult insertedIntoAncestor(InsertionType, ContainerNode&) final;
> void didFinishInsertingNode() final;
> void childrenChanged(const ChildChange&) final;
>diff --git a/Source/WebCore/html/HTMLSelectElement.cpp b/Source/WebCore/html/HTMLSelectElement.cpp
>index 3ea01c073cf7f13395e2e8231281fcebcbb7639a..8ba30f2bcb2a1c3bb4dec29ab06f9589404be0dc 100644
>--- a/Source/WebCore/html/HTMLSelectElement.cpp
>+++ b/Source/WebCore/html/HTMLSelectElement.cpp
>@@ -98,10 +98,10 @@ void HTMLSelectElement::didRecalcStyle(Style::Change styleChange)
> HTMLFormControlElement::didRecalcStyle(styleChange);
> }
> 
>-const AtomicString& HTMLSelectElement::formControlType() const
>+const AtomString& HTMLSelectElement::formControlType() const
> {
>- static NeverDestroyed<const AtomicString> selectMultiple("select-multiple", AtomicString::ConstructFromLiteral);
>- static NeverDestroyed<const AtomicString> selectOne("select-one", AtomicString::ConstructFromLiteral);
>+ static NeverDestroyed<const AtomString> selectMultiple("select-multiple", AtomString::ConstructFromLiteral);
>+ static NeverDestroyed<const AtomString> selectOne("select-one", AtomString::ConstructFromLiteral);
> return m_multiple ? selectMultiple : selectOne;
> }
> 
>@@ -288,7 +288,7 @@ bool HTMLSelectElement::isPresentationAttribute(const QualifiedName& name) const
> return HTMLFormControlElementWithState::isPresentationAttribute(name);
> }
> 
>-void HTMLSelectElement::parseAttribute(const QualifiedName& name, const AtomicString& value)
>+void HTMLSelectElement::parseAttribute(const QualifiedName& name, const AtomString& value)
> {
> if (name == sizeAttr) {
> unsigned oldSize = m_size;
>@@ -408,7 +408,7 @@ void HTMLSelectElement::setSize(unsigned size)
> setUnsignedIntegralAttribute(sizeAttr, limitToOnlyHTMLNonNegative(size));
> }
> 
>-HTMLOptionElement* HTMLSelectElement::namedItem(const AtomicString& name)
>+HTMLOptionElement* HTMLSelectElement::namedItem(const AtomString& name)
> {
> return options()->namedItem(name);
> }
>@@ -1026,7 +1026,7 @@ void HTMLSelectElement::restoreFormControlState(const FormControlState& state)
> updateValidity();
> }
> 
>-void HTMLSelectElement::parseMultipleAttribute(const AtomicString& value)
>+void HTMLSelectElement::parseMultipleAttribute(const AtomString& value)
> {
> bool oldUsesMenuList = usesMenuList();
> m_multiple = !value.isNull();
>@@ -1037,7 +1037,7 @@ void HTMLSelectElement::parseMultipleAttribute(const AtomicString& value)
> 
> bool HTMLSelectElement::appendFormData(DOMFormData& formData, bool)
> {
>- const AtomicString& name = this->name();
>+ const AtomString& name = this->name();
> if (name.isEmpty())
> return false;
> 
>diff --git a/Source/WebCore/html/HTMLSelectElement.h b/Source/WebCore/html/HTMLSelectElement.h
>index 4eca39626d91fa7a32ea70ca2175e6a8f6575d22..fbe88776882dcd38456ab8d6dcc41660cf02eb1d 100644
>--- a/Source/WebCore/html/HTMLSelectElement.h
>+++ b/Source/WebCore/html/HTMLSelectElement.h
>@@ -84,7 +84,7 @@ public:
> ExceptionOr<void> setItem(unsigned index, HTMLOptionElement*);
> ExceptionOr<void> setLength(unsigned);
> 
>- WEBCORE_EXPORT HTMLOptionElement* namedItem(const AtomicString& name);
>+ WEBCORE_EXPORT HTMLOptionElement* namedItem(const AtomString& name);
> WEBCORE_EXPORT HTMLOptionElement* item(unsigned index);
> 
> void scrollToSelection();
>@@ -110,7 +110,7 @@ protected:
> HTMLSelectElement(const QualifiedName&, Document&, HTMLFormElement*);
> 
> private:
>- const AtomicString& formControlType() const final;
>+ const AtomString& formControlType() const final;
> 
> bool isKeyboardFocusable(KeyboardEvent*) const final;
> bool isMouseFocusable() const final;
>@@ -126,7 +126,7 @@ private:
> FormControlState saveFormControlState() const final;
> void restoreFormControlState(const FormControlState&) final;
> 
>- void parseAttribute(const QualifiedName&, const AtomicString&) final;
>+ void parseAttribute(const QualifiedName&, const AtomString&) final;
> bool isPresentationAttribute(const QualifiedName&) const final;
> 
> bool childShouldCreateRenderer(const Node&) const final;
>@@ -163,7 +163,7 @@ private:
> typedef unsigned SelectOptionFlags;
> void selectOption(int optionIndex, SelectOptionFlags = 0);
> void deselectItemsWithoutValidation(HTMLElement* elementToExclude = nullptr);
>- void parseMultipleAttribute(const AtomicString&);
>+ void parseMultipleAttribute(const AtomString&);
> int lastSelectedListIndex() const;
> void updateSelectedState(int listIndex, bool multi, bool shift);
> void menuListDefaultEventHandler(Event&);
>diff --git a/Source/WebCore/html/HTMLSlotElement.cpp b/Source/WebCore/html/HTMLSlotElement.cpp
>index 8190846802596e580d4a4b023b5011ff01fdad2b..7f4fa8b9a217e3d396643cd91567fff4a09f049b 100644
>--- a/Source/WebCore/html/HTMLSlotElement.cpp
>+++ b/Source/WebCore/html/HTMLSlotElement.cpp
>@@ -85,7 +85,7 @@ void HTMLSlotElement::childrenChanged(const ChildChange& childChange)
> }
> }
> 
>-void HTMLSlotElement::attributeChanged(const QualifiedName& name, const AtomicString& oldValue, const AtomicString& newValue, AttributeModificationReason reason)
>+void HTMLSlotElement::attributeChanged(const QualifiedName& name, const AtomString& oldValue, const AtomString& newValue, AttributeModificationReason reason)
> {
> HTMLElement::attributeChanged(name, oldValue, newValue, reason);
> 
>diff --git a/Source/WebCore/html/HTMLSlotElement.h b/Source/WebCore/html/HTMLSlotElement.h
>index ef8aecb54d83875e4a3941462e1c53f4c900d5b8..fd3de09e7d01fb16627c77fba32ec1a1b2095fa8 100644
>--- a/Source/WebCore/html/HTMLSlotElement.h
>+++ b/Source/WebCore/html/HTMLSlotElement.h
>@@ -53,7 +53,7 @@ private:
> InsertedIntoAncestorResult insertedIntoAncestor(InsertionType, ContainerNode&) final;
> void removedFromAncestor(RemovalType, ContainerNode&) final;
> void childrenChanged(const ChildChange&) final;
>- void attributeChanged(const QualifiedName&, const AtomicString& oldValue, const AtomicString& newValue, AttributeModificationReason) final;
>+ void attributeChanged(const QualifiedName&, const AtomString& oldValue, const AtomString& newValue, AttributeModificationReason) final;
> 
> bool m_inSignalSlotList { false };
> };
>diff --git a/Source/WebCore/html/HTMLSourceElement.cpp b/Source/WebCore/html/HTMLSourceElement.cpp
>index 29117283fba8edb0b352cb1d7aed40215b24d624..88ec5a76a60ecbf60ecd225811cbf332fe123bca 100644
>--- a/Source/WebCore/html/HTMLSourceElement.cpp
>+++ b/Source/WebCore/html/HTMLSourceElement.cpp
>@@ -154,7 +154,7 @@ void HTMLSourceElement::stop()
> cancelPendingErrorEvent();
> }
> 
>-void HTMLSourceElement::parseAttribute(const QualifiedName& name, const AtomicString& value)
>+void HTMLSourceElement::parseAttribute(const QualifiedName& name, const AtomString& value)
> {
> HTMLElement::parseAttribute(name, value);
> if (name == srcsetAttr || name == sizesAttr || name == mediaAttr || name == typeAttr) {
>diff --git a/Source/WebCore/html/HTMLSourceElement.h b/Source/WebCore/html/HTMLSourceElement.h
>index 4f64854e28a2a950e84a23d7989c3cab5b775bbd..e122733e6d44d6c45a8ed16966d1b709e5bbb1d1 100644
>--- a/Source/WebCore/html/HTMLSourceElement.h
>+++ b/Source/WebCore/html/HTMLSourceElement.h
>@@ -57,7 +57,7 @@ private:
> void resume() final;
> void stop() final;
> 
>- void parseAttribute(const QualifiedName&, const AtomicString&) final;
>+ void parseAttribute(const QualifiedName&, const AtomString&) final;
> 
> void errorEventTimerFired();
> 
>diff --git a/Source/WebCore/html/HTMLStyleElement.cpp b/Source/WebCore/html/HTMLStyleElement.cpp
>index e528c5954cea7d31c674c4efac2c3b430748043b..5eb6371099f9f6bb0f4197a981b14e6dde8f3194 100644
>--- a/Source/WebCore/html/HTMLStyleElement.cpp
>+++ b/Source/WebCore/html/HTMLStyleElement.cpp
>@@ -76,7 +76,7 @@ Ref<HTMLStyleElement> HTMLStyleElement::create(Document& document)
> return adoptRef(*new HTMLStyleElement(styleTag, document, false));
> }
> 
>-void HTMLStyleElement::parseAttribute(const QualifiedName& name, const AtomicString& value)
>+void HTMLStyleElement::parseAttribute(const QualifiedName& name, const AtomString& value)
> {
> if (name == titleAttr && sheet() && !isInShadowTree())
> sheet()->setTitle(value);
>diff --git a/Source/WebCore/html/HTMLStyleElement.h b/Source/WebCore/html/HTMLStyleElement.h
>index af05b715f2017b85df8a20fb622b33968db70eb8..a553ea3567baa3d43f856c27c3ad3a37db7b86c2 100644
>--- a/Source/WebCore/html/HTMLStyleElement.h
>+++ b/Source/WebCore/html/HTMLStyleElement.h
>@@ -54,7 +54,7 @@ public:
> private:
> HTMLStyleElement(const QualifiedName&, Document&, bool createdByParser);
> 
>- void parseAttribute(const QualifiedName&, const AtomicString&) final;
>+ void parseAttribute(const QualifiedName&, const AtomString&) final;
> InsertedIntoAncestorResult insertedIntoAncestor(InsertionType, ContainerNode&) final;
> void removedFromAncestor(RemovalType, ContainerNode&) final;
> void childrenChanged(const ChildChange&) final;
>diff --git a/Source/WebCore/html/HTMLSummaryElement.cpp b/Source/WebCore/html/HTMLSummaryElement.cpp
>index f098d5abf385c94d91dd7f590b1af4aa83796357..10bc09ff099c888b226269390b8e1f8be4ce3967 100644
>--- a/Source/WebCore/html/HTMLSummaryElement.cpp
>+++ b/Source/WebCore/html/HTMLSummaryElement.cpp
>@@ -47,7 +47,7 @@ private:
> didChangeSlot(SlotAssignment::defaultSlotName(), shadowRoot);
> }
> 
>- const AtomicString& slotNameForHostChild(const Node&) const override { return SlotAssignment::defaultSlotName(); }
>+ const AtomString& slotNameForHostChild(const Node&) const override { return SlotAssignment::defaultSlotName(); }
> };
> 
> Ref<HTMLSummaryElement> HTMLSummaryElement::create(const QualifiedName& tagName, Document& document)
>diff --git a/Source/WebCore/html/HTMLTableCaptionElement.cpp b/Source/WebCore/html/HTMLTableCaptionElement.cpp
>index 210e1a73a0782de4c1a1c37505c5c2057dd4d5a9..9d97e286a8c1f380212357c2f28ee16b0efcb673 100644
>--- a/Source/WebCore/html/HTMLTableCaptionElement.cpp
>+++ b/Source/WebCore/html/HTMLTableCaptionElement.cpp
>@@ -46,7 +46,7 @@ Ref<HTMLTableCaptionElement> HTMLTableCaptionElement::create(const QualifiedName
> return adoptRef(*new HTMLTableCaptionElement(tagName, document));
> }
> 
>-void HTMLTableCaptionElement::collectStyleForPresentationAttribute(const QualifiedName& name, const AtomicString& value, MutableStyleProperties& style)
>+void HTMLTableCaptionElement::collectStyleForPresentationAttribute(const QualifiedName& name, const AtomString& value, MutableStyleProperties& style)
> {
> if (name == alignAttr) {
> if (!value.isEmpty())
>diff --git a/Source/WebCore/html/HTMLTableCaptionElement.h b/Source/WebCore/html/HTMLTableCaptionElement.h
>index 0020ea2fa95d4d7f6e41652f59986a190b8a2c36..801cde0bb1651e41a0ec3da86d8cb11ed9453bdd 100644
>--- a/Source/WebCore/html/HTMLTableCaptionElement.h
>+++ b/Source/WebCore/html/HTMLTableCaptionElement.h
>@@ -37,7 +37,7 @@ public:
> private:
> HTMLTableCaptionElement(const QualifiedName&, Document&);
> 
>- void collectStyleForPresentationAttribute(const QualifiedName&, const AtomicString&, MutableStyleProperties&) final;
>+ void collectStyleForPresentationAttribute(const QualifiedName&, const AtomString&, MutableStyleProperties&) final;
> };
> 
> } // namespace WebCore
>diff --git a/Source/WebCore/html/HTMLTableCellElement.cpp b/Source/WebCore/html/HTMLTableCellElement.cpp
>index 1e1ebb994750a545a93ba33fdc5f1be08b3d6994..52a9b4fa6a67aeaf244d31e8120e14c04b4b29fb 100644
>--- a/Source/WebCore/html/HTMLTableCellElement.cpp
>+++ b/Source/WebCore/html/HTMLTableCellElement.cpp
>@@ -97,7 +97,7 @@ bool HTMLTableCellElement::isPresentationAttribute(const QualifiedName& name) co
> return HTMLTablePartElement::isPresentationAttribute(name);
> }
> 
>-void HTMLTableCellElement::collectStyleForPresentationAttribute(const QualifiedName& name, const AtomicString& value, MutableStyleProperties& style)
>+void HTMLTableCellElement::collectStyleForPresentationAttribute(const QualifiedName& name, const AtomString& value, MutableStyleProperties& style)
> {
> if (name == nowrapAttr)
> addPropertyToPresentationAttributeStyle(style, CSSPropertyWhiteSpace, CSSValueWebkitNowrap);
>@@ -117,7 +117,7 @@ void HTMLTableCellElement::collectStyleForPresentationAttribute(const QualifiedN
> HTMLTablePartElement::collectStyleForPresentationAttribute(name, value, style);
> }
> 
>-void HTMLTableCellElement::parseAttribute(const QualifiedName& name, const AtomicString& value)
>+void HTMLTableCellElement::parseAttribute(const QualifiedName& name, const AtomString& value)
> {
> if (name == rowspanAttr) {
> if (is<RenderTableCell>(renderer()))
>@@ -153,7 +153,7 @@ String HTMLTableCellElement::axis() const
> 
> void HTMLTableCellElement::setColSpan(unsigned n)
> {
>- setAttributeWithoutSynchronization(colspanAttr, AtomicString::number(limitToOnlyHTMLNonNegative(n, 1)));
>+ setAttributeWithoutSynchronization(colspanAttr, AtomString::number(limitToOnlyHTMLNonNegative(n, 1)));
> }
> 
> String HTMLTableCellElement::headers() const
>@@ -163,18 +163,18 @@ String HTMLTableCellElement::headers() const
> 
> void HTMLTableCellElement::setRowSpanForBindings(unsigned n)
> {
>- setAttributeWithoutSynchronization(rowspanAttr, AtomicString::number(limitToOnlyHTMLNonNegative(n, 1)));
>+ setAttributeWithoutSynchronization(rowspanAttr, AtomString::number(limitToOnlyHTMLNonNegative(n, 1)));
> }
> 
>-const AtomicString& HTMLTableCellElement::scope() const
>+const AtomString& HTMLTableCellElement::scope() const
> {
> // https://html.spec.whatwg.org/multipage/tables.html#attr-th-scope
>- static NeverDestroyed<const AtomicString> row("row", AtomicString::ConstructFromLiteral);
>- static NeverDestroyed<const AtomicString> col("col", AtomicString::ConstructFromLiteral);
>- static NeverDestroyed<const AtomicString> rowgroup("rowgroup", AtomicString::ConstructFromLiteral);
>- static NeverDestroyed<const AtomicString> colgroup("colgroup", AtomicString::ConstructFromLiteral);
>+ static NeverDestroyed<const AtomString> row("row", AtomString::ConstructFromLiteral);
>+ static NeverDestroyed<const AtomString> col("col", AtomString::ConstructFromLiteral);
>+ static NeverDestroyed<const AtomString> rowgroup("rowgroup", AtomString::ConstructFromLiteral);
>+ static NeverDestroyed<const AtomString> colgroup("colgroup", AtomString::ConstructFromLiteral);
> 
>- const AtomicString& value = attributeWithoutSynchronization(HTMLNames::scopeAttr);
>+ const AtomString& value = attributeWithoutSynchronization(HTMLNames::scopeAttr);
> 
> if (equalIgnoringASCIICase(value, row))
> return row;
>@@ -187,7 +187,7 @@ const AtomicString& HTMLTableCellElement::scope() const
> return emptyAtom();
> }
> 
>-void HTMLTableCellElement::setScope(const AtomicString& scope)
>+void HTMLTableCellElement::setScope(const AtomString& scope)
> {
> setAttributeWithoutSynchronization(scopeAttr, scope);
> }
>diff --git a/Source/WebCore/html/HTMLTableCellElement.h b/Source/WebCore/html/HTMLTableCellElement.h
>index 84233b53c81c6fec804c6e0e95686b3d3bf77f2d..f04539313db75429dbe78343734885f94148ab6b 100644
>--- a/Source/WebCore/html/HTMLTableCellElement.h
>+++ b/Source/WebCore/html/HTMLTableCellElement.h
>@@ -46,17 +46,17 @@ public:
> String abbr() const;
> String axis() const;
> String headers() const;
>- WEBCORE_EXPORT const AtomicString& scope() const;
>- WEBCORE_EXPORT void setScope(const AtomicString&);
>+ WEBCORE_EXPORT const AtomString& scope() const;
>+ WEBCORE_EXPORT void setScope(const AtomString&);
> 
> WEBCORE_EXPORT HTMLTableCellElement* cellAbove() const;
> 
> private:
> HTMLTableCellElement(const QualifiedName&, Document&);
> 
>- void parseAttribute(const QualifiedName&, const AtomicString&) override;
>+ void parseAttribute(const QualifiedName&, const AtomString&) override;
> bool isPresentationAttribute(const QualifiedName&) const override;
>- void collectStyleForPresentationAttribute(const QualifiedName&, const AtomicString&, MutableStyleProperties&) override;
>+ void collectStyleForPresentationAttribute(const QualifiedName&, const AtomString&, MutableStyleProperties&) override;
> const StyleProperties* additionalPresentationAttributeStyle() const override;
> 
> bool isURLAttribute(const Attribute&) const override;
>diff --git a/Source/WebCore/html/HTMLTableColElement.cpp b/Source/WebCore/html/HTMLTableColElement.cpp
>index 209ff4efd37e15ae243fc4c075c262f19b6f803e..728b5f3d2b5523b04b399f2cc4b55aa4f8b1fc74 100644
>--- a/Source/WebCore/html/HTMLTableColElement.cpp
>+++ b/Source/WebCore/html/HTMLTableColElement.cpp
>@@ -61,7 +61,7 @@ bool HTMLTableColElement::isPresentationAttribute(const QualifiedName& name) con
> return HTMLTablePartElement::isPresentationAttribute(name);
> }
> 
>-void HTMLTableColElement::collectStyleForPresentationAttribute(const QualifiedName& name, const AtomicString& value, MutableStyleProperties& style)
>+void HTMLTableColElement::collectStyleForPresentationAttribute(const QualifiedName& name, const AtomString& value, MutableStyleProperties& style)
> {
> if (name == widthAttr)
> addHTMLLengthToStyle(style, CSSPropertyWidth, value);
>@@ -69,7 +69,7 @@ void HTMLTableColElement::collectStyleForPresentationAttribute(const QualifiedNa
> HTMLTablePartElement::collectStyleForPresentationAttribute(name, value, style);
> }
> 
>-void HTMLTableColElement::parseAttribute(const QualifiedName& name, const AtomicString& value)
>+void HTMLTableColElement::parseAttribute(const QualifiedName& name, const AtomString& value)
> {
> if (name == spanAttr) {
> m_span = clampHTMLNonNegativeIntegerToRange(value, minSpan, maxSpan, defaultSpan);
>diff --git a/Source/WebCore/html/HTMLTableColElement.h b/Source/WebCore/html/HTMLTableColElement.h
>index dcf074d4cc026cffcfc833ee312bf7e23d622189..2f4f6382b64c7414a72813194971329dc249b412 100644
>--- a/Source/WebCore/html/HTMLTableColElement.h
>+++ b/Source/WebCore/html/HTMLTableColElement.h
>@@ -42,9 +42,9 @@ public:
> private:
> HTMLTableColElement(const QualifiedName& tagName, Document&);
> 
>- void parseAttribute(const QualifiedName&, const AtomicString&) final;
>+ void parseAttribute(const QualifiedName&, const AtomString&) final;
> bool isPresentationAttribute(const QualifiedName&) const final;
>- void collectStyleForPresentationAttribute(const QualifiedName&, const AtomicString&, MutableStyleProperties&) final;
>+ void collectStyleForPresentationAttribute(const QualifiedName&, const AtomString&, MutableStyleProperties&) final;
> const StyleProperties* additionalPresentationAttributeStyle() const final;
> 
> unsigned m_span;
>diff --git a/Source/WebCore/html/HTMLTableElement.cpp b/Source/WebCore/html/HTMLTableElement.cpp
>index be6ed0fea1bab2626e8036976b6074d5614364a9..238b9a949d7e99179cb9b85cf1309a60b0a77abe 100644
>--- a/Source/WebCore/html/HTMLTableElement.cpp
>+++ b/Source/WebCore/html/HTMLTableElement.cpp
>@@ -278,7 +278,7 @@ static bool setTableCellsChanged(Element& element)
> return cellChanged;
> }
> 
>-static bool getBordersFromFrameAttributeValue(const AtomicString& value, bool& borderTop, bool& borderRight, bool& borderBottom, bool& borderLeft)
>+static bool getBordersFromFrameAttributeValue(const AtomString& value, bool& borderTop, bool& borderRight, bool& borderBottom, bool& borderLeft)
> {
> borderTop = false;
> borderRight = false;
>@@ -304,7 +304,7 @@ static bool getBordersFromFrameAttributeValue(const AtomicString& value, bool& b
> return true;
> }
> 
>-void HTMLTableElement::collectStyleForPresentationAttribute(const QualifiedName& name, const AtomicString& value, MutableStyleProperties& style)
>+void HTMLTableElement::collectStyleForPresentationAttribute(const QualifiedName& name, const AtomString& value, MutableStyleProperties& style)
> {
> if (name == widthAttr)
> addHTMLLengthToStyle(style, CSSPropertyWidth, value);
>@@ -368,7 +368,7 @@ bool HTMLTableElement::isPresentationAttribute(const QualifiedName& name) const
> return HTMLElement::isPresentationAttribute(name);
> }
> 
>-void HTMLTableElement::parseAttribute(const QualifiedName& name, const AtomicString& value)
>+void HTMLTableElement::parseAttribute(const QualifiedName& name, const AtomString& value)
> {
> CellBorders bordersBefore = cellBorders();
> unsigned short oldPadding = m_padding;
>@@ -566,12 +566,12 @@ Ref<HTMLCollection> HTMLTableElement::tBodies()
> return ensureRareData().ensureNodeLists().addCachedCollection<GenericCachedHTMLCollection<CollectionTypeTraits<TableTBodies>::traversalType>>(*this, TableTBodies);
> }
> 
>-const AtomicString& HTMLTableElement::rules() const
>+const AtomString& HTMLTableElement::rules() const
> {
> return attributeWithoutSynchronization(rulesAttr);
> }
> 
>-const AtomicString& HTMLTableElement::summary() const
>+const AtomString& HTMLTableElement::summary() const
> {
> return attributeWithoutSynchronization(summaryAttr);
> }
>diff --git a/Source/WebCore/html/HTMLTableElement.h b/Source/WebCore/html/HTMLTableElement.h
>index a7b7f81ee4bcf071f8825e3bb674dc9521e93ca4..b3654209bda857885c6931c81b4ee3f986f38416 100644
>--- a/Source/WebCore/html/HTMLTableElement.h
>+++ b/Source/WebCore/html/HTMLTableElement.h
>@@ -62,8 +62,8 @@ public:
> WEBCORE_EXPORT Ref<HTMLCollection> rows();
> WEBCORE_EXPORT Ref<HTMLCollection> tBodies();
> 
>- const AtomicString& rules() const;
>- const AtomicString& summary() const;
>+ const AtomString& rules() const;
>+ const AtomString& summary() const;
> 
> const StyleProperties* additionalCellStyle();
> const StyleProperties* additionalGroupStyle(bool rows);
>@@ -71,9 +71,9 @@ public:
> private:
> HTMLTableElement(const QualifiedName&, Document&);
> 
>- void parseAttribute(const QualifiedName&, const AtomicString&) final;
>+ void parseAttribute(const QualifiedName&, const AtomString&) final;
> bool isPresentationAttribute(const QualifiedName&) const final;
>- void collectStyleForPresentationAttribute(const QualifiedName&, const AtomicString&, MutableStyleProperties&) final;
>+ void collectStyleForPresentationAttribute(const QualifiedName&, const AtomString&, MutableStyleProperties&) final;
> bool isURLAttribute(const Attribute&) const final;
> 
> // Used to obtain either a solid or outset border decl and to deal with the frame and rules attributes.
>diff --git a/Source/WebCore/html/HTMLTablePartElement.cpp b/Source/WebCore/html/HTMLTablePartElement.cpp
>index 3bf2aac8bdfabb6b27761c8511d44419de4c77f2..35878016210fcaaff6090e695394155c455aea7c 100644
>--- a/Source/WebCore/html/HTMLTablePartElement.cpp
>+++ b/Source/WebCore/html/HTMLTablePartElement.cpp
>@@ -48,7 +48,7 @@ bool HTMLTablePartElement::isPresentationAttribute(const QualifiedName& name) co
> return HTMLElement::isPresentationAttribute(name);
> }
> 
>-void HTMLTablePartElement::collectStyleForPresentationAttribute(const QualifiedName& name, const AtomicString& value, MutableStyleProperties& style)
>+void HTMLTablePartElement::collectStyleForPresentationAttribute(const QualifiedName& name, const AtomString& value, MutableStyleProperties& style)
> {
> if (name == bgcolorAttr)
> addHTMLColorToStyle(style, CSSPropertyBackgroundColor, value);
>diff --git a/Source/WebCore/html/HTMLTablePartElement.h b/Source/WebCore/html/HTMLTablePartElement.h
>index 194fc5dfd4500b5a497efa4249b2322458bbea7c..d3bcf50bae21c358cde23f3363e5c692d56f11e6 100644
>--- a/Source/WebCore/html/HTMLTablePartElement.h
>+++ b/Source/WebCore/html/HTMLTablePartElement.h
>@@ -40,7 +40,7 @@ protected:
> }
> 
> bool isPresentationAttribute(const QualifiedName&) const override;
>- void collectStyleForPresentationAttribute(const QualifiedName&, const AtomicString&, MutableStyleProperties&) override;
>+ void collectStyleForPresentationAttribute(const QualifiedName&, const AtomString&, MutableStyleProperties&) override;
> 
> RefPtr<HTMLTableElement> findParentTable() const;
> };
>diff --git a/Source/WebCore/html/HTMLTextAreaElement.cpp b/Source/WebCore/html/HTMLTextAreaElement.cpp
>index 86adeef778da0d88f383a7b41c9cca9bbcfe9978..125fdd3199266a6315f515fa1b4ea0b423774132 100644
>--- a/Source/WebCore/html/HTMLTextAreaElement.cpp
>+++ b/Source/WebCore/html/HTMLTextAreaElement.cpp
>@@ -109,9 +109,9 @@ void HTMLTextAreaElement::didAddUserAgentShadowRoot(ShadowRoot& root)
> updateInnerTextElementEditability();
> }
> 
>-const AtomicString& HTMLTextAreaElement::formControlType() const
>+const AtomString& HTMLTextAreaElement::formControlType() const
> {
>- static NeverDestroyed<const AtomicString> textarea("textarea", AtomicString::ConstructFromLiteral);
>+ static NeverDestroyed<const AtomString> textarea("textarea", AtomString::ConstructFromLiteral);
> return textarea;
> }
> 
>@@ -148,7 +148,7 @@ bool HTMLTextAreaElement::isPresentationAttribute(const QualifiedName& name) con
> return HTMLTextFormControlElement::isPresentationAttribute(name);
> }
> 
>-void HTMLTextAreaElement::collectStyleForPresentationAttribute(const QualifiedName& name, const AtomicString& value, MutableStyleProperties& style)
>+void HTMLTextAreaElement::collectStyleForPresentationAttribute(const QualifiedName& name, const AtomString& value, MutableStyleProperties& style)
> {
> if (name == wrapAttr) {
> if (shouldWrapText()) {
>@@ -162,7 +162,7 @@ void HTMLTextAreaElement::collectStyleForPresentationAttribute(const QualifiedNa
> HTMLTextFormControlElement::collectStyleForPresentationAttribute(name, value, style);
> }
> 
>-void HTMLTextAreaElement::parseAttribute(const QualifiedName& name, const AtomicString& value)
>+void HTMLTextAreaElement::parseAttribute(const QualifiedName& name, const AtomString& value)
> {
> if (name == rowsAttr) {
> unsigned rows = limitToOnlyHTMLNonNegativeNumbersGreaterThanZero(value, defaultRows);
>@@ -201,13 +201,13 @@ void HTMLTextAreaElement::parseAttribute(const QualifiedName& name, const Atomic
> HTMLTextFormControlElement::parseAttribute(name, value);
> }
> 
>-void HTMLTextAreaElement::maxLengthAttributeChanged(const AtomicString& newValue)
>+void HTMLTextAreaElement::maxLengthAttributeChanged(const AtomString& newValue)
> {
> internalSetMaxLength(parseHTMLNonNegativeInteger(newValue).value_or(-1));
> updateValidity();
> }
> 
>-void HTMLTextAreaElement::minLengthAttributeChanged(const AtomicString& newValue)
>+void HTMLTextAreaElement::minLengthAttributeChanged(const AtomString& newValue)
> {
> internalSetMinLength(parseHTMLNonNegativeInteger(newValue).value_or(-1));
> updateValidity();
>diff --git a/Source/WebCore/html/HTMLTextAreaElement.h b/Source/WebCore/html/HTMLTextAreaElement.h
>index a52bc62851b50a3cc54e9e7248c0d95aaa5ee9a3..01da69427dc59b4f1a1ab20f77ff40ee0b239ff6 100644
>--- a/Source/WebCore/html/HTMLTextAreaElement.h
>+++ b/Source/WebCore/html/HTMLTextAreaElement.h
>@@ -74,8 +74,8 @@ private:
> 
> void didAddUserAgentShadowRoot(ShadowRoot&) final;
> 
>- void maxLengthAttributeChanged(const AtomicString& newValue);
>- void minLengthAttributeChanged(const AtomicString& newValue);
>+ void maxLengthAttributeChanged(const AtomString& newValue);
>+ void minLengthAttributeChanged(const AtomString& newValue);
> 
> void handleBeforeTextInsertedEvent(BeforeTextInsertedEvent&) const;
> static String sanitizeUserInputValue(const String&, unsigned maxLength);
>@@ -98,7 +98,7 @@ private:
> bool isEnumeratable() const final { return true; }
> bool supportLabels() const final { return true; }
> 
>- const AtomicString& formControlType() const final;
>+ const AtomString& formControlType() const final;
> 
> FormControlState saveFormControlState() const final;
> void restoreFormControlState(const FormControlState&) final;
>@@ -106,9 +106,9 @@ private:
> bool isTextField() const final { return true; }
> 
> void childrenChanged(const ChildChange&) final;
>- void parseAttribute(const QualifiedName&, const AtomicString&) final;
>+ void parseAttribute(const QualifiedName&, const AtomString&) final;
> bool isPresentationAttribute(const QualifiedName&) const final;
>- void collectStyleForPresentationAttribute(const QualifiedName&, const AtomicString&, MutableStyleProperties&) final;
>+ void collectStyleForPresentationAttribute(const QualifiedName&, const AtomString&, MutableStyleProperties&) final;
> RenderPtr<RenderElement> createElementRenderer(RenderStyle&&, const RenderTreePosition&) final;
> bool appendFormData(DOMFormData&, bool) final;
> void reset() final;
>diff --git a/Source/WebCore/html/HTMLTextFormControlElement.cpp b/Source/WebCore/html/HTMLTextFormControlElement.cpp
>index 8136933ad554c5a1f7e0c6ca7879d965efc3dca9..9722ff0e7d390126560005e3515a1b8b81ea998f 100644
>--- a/Source/WebCore/html/HTMLTextFormControlElement.cpp
>+++ b/Source/WebCore/html/HTMLTextFormControlElement.cpp
>@@ -130,7 +130,7 @@ String HTMLTextFormControlElement::strippedPlaceholder() const
> {
> // According to the HTML5 specification, we need to remove CR and LF from
> // the attribute value.
>- const AtomicString& attributeValue = attributeWithoutSynchronization(placeholderAttr);
>+ const AtomString& attributeValue = attributeWithoutSynchronization(placeholderAttr);
> if (!attributeValue.contains(newlineCharacter) && !attributeValue.contains(carriageReturn))
> return attributeValue;
> 
>@@ -150,7 +150,7 @@ static bool isNotLineBreak(UChar ch) { return ch != newlineCharacter && ch != ca
> 
> bool HTMLTextFormControlElement::isPlaceholderEmpty() const
> {
>- const AtomicString& attributeValue = attributeWithoutSynchronization(placeholderAttr);
>+ const AtomString& attributeValue = attributeWithoutSynchronization(placeholderAttr);
> return attributeValue.string().find(isNotLineBreak) == notFound;
> }
> 
>@@ -376,11 +376,11 @@ int HTMLTextFormControlElement::computeSelectionEnd() const
> return indexForPosition(frame->selection().selection().end());
> }
> 
>-static const AtomicString& directionString(TextFieldSelectionDirection direction)
>+static const AtomString& directionString(TextFieldSelectionDirection direction)
> {
>- static NeverDestroyed<const AtomicString> none("none", AtomicString::ConstructFromLiteral);
>- static NeverDestroyed<const AtomicString> forward("forward", AtomicString::ConstructFromLiteral);
>- static NeverDestroyed<const AtomicString> backward("backward", AtomicString::ConstructFromLiteral);
>+ static NeverDestroyed<const AtomString> none("none", AtomString::ConstructFromLiteral);
>+ static NeverDestroyed<const AtomString> forward("forward", AtomString::ConstructFromLiteral);
>+ static NeverDestroyed<const AtomString> backward("backward", AtomString::ConstructFromLiteral);
> 
> switch (direction) {
> case SelectionHasNoDirection:
>@@ -395,7 +395,7 @@ static const AtomicString& directionString(TextFieldSelectionDirection direction
> return none;
> }
> 
>-const AtomicString& HTMLTextFormControlElement::selectionDirection() const
>+const AtomString& HTMLTextFormControlElement::selectionDirection() const
> {
> if (!isTextField())
> return directionString(SelectionHasNoDirection);
>@@ -486,7 +486,7 @@ void HTMLTextFormControlElement::selectionChanged(bool shouldFireSelectEvent)
> dispatchEvent(Event::create(eventNames().selectEvent, Event::CanBubble::Yes, Event::IsCancelable::No));
> }
> 
>-void HTMLTextFormControlElement::parseAttribute(const QualifiedName& name, const AtomicString& value)
>+void HTMLTextFormControlElement::parseAttribute(const QualifiedName& name, const AtomString& value)
> {
> if (name == placeholderAttr) {
> updatePlaceholderText();
>@@ -515,7 +515,7 @@ bool HTMLTextFormControlElement::isInnerTextElementEditable() const
> void HTMLTextFormControlElement::updateInnerTextElementEditability()
> {
> if (auto innerText = innerTextElement()) {
>- auto value = isInnerTextElementEditable() ? AtomicString { "plaintext-only", AtomicString::ConstructFromLiteral } : AtomicString { "false", AtomicString::ConstructFromLiteral };
>+ auto value = isInnerTextElementEditable() ? AtomString { "plaintext-only", AtomString::ConstructFromLiteral } : AtomString { "false", AtomString::ConstructFromLiteral };
> innerText->setAttributeWithoutSynchronization(contenteditableAttr, value);
> }
> }
>@@ -758,7 +758,7 @@ static const Element* parentHTMLElement(const Element* element)
> String HTMLTextFormControlElement::directionForFormData() const
> {
> for (const Element* element = this; element; element = parentHTMLElement(element)) {
>- const AtomicString& dirAttributeValue = element->attributeWithoutSynchronization(dirAttr);
>+ const AtomString& dirAttributeValue = element->attributeWithoutSynchronization(dirAttr);
> if (dirAttributeValue.isNull())
> continue;
> 
>diff --git a/Source/WebCore/html/HTMLTextFormControlElement.h b/Source/WebCore/html/HTMLTextFormControlElement.h
>index cf8c744b703fc54eb59391403b619f2d563eef5e..7494d254d550ab543774925be9083823125bb99f 100644
>--- a/Source/WebCore/html/HTMLTextFormControlElement.h
>+++ b/Source/WebCore/html/HTMLTextFormControlElement.h
>@@ -66,7 +66,7 @@ public:
> WEBCORE_EXPORT VisiblePosition visiblePositionForIndex(int index) const;
> WEBCORE_EXPORT int selectionStart() const;
> WEBCORE_EXPORT int selectionEnd() const;
>- WEBCORE_EXPORT const AtomicString& selectionDirection() const;
>+ WEBCORE_EXPORT const AtomString& selectionDirection() const;
> WEBCORE_EXPORT void setSelectionStart(int);
> WEBCORE_EXPORT void setSelectionEnd(int);
> WEBCORE_EXPORT void setSelectionDirection(const String&);
>@@ -105,7 +105,7 @@ protected:
> bool isPlaceholderEmpty() const;
> virtual void updatePlaceholderText() = 0;
> 
>- void parseAttribute(const QualifiedName&, const AtomicString&) override;
>+ void parseAttribute(const QualifiedName&, const AtomString&) override;
> 
> void disabledStateChanged() override;
> void readOnlyStateChanged() override;
>diff --git a/Source/WebCore/html/HTMLTrackElement.cpp b/Source/WebCore/html/HTMLTrackElement.cpp
>index 011c16dfad876d7811aca8a864d923dfaa423fa3..ae7d80cc6fefef2e09048ee3734cd3d3e37b0f25 100644
>--- a/Source/WebCore/html/HTMLTrackElement.cpp
>+++ b/Source/WebCore/html/HTMLTrackElement.cpp
>@@ -99,7 +99,7 @@ void HTMLTrackElement::removedFromAncestor(RemovalType removalType, ContainerNod
> downcast<HTMLMediaElement>(oldParentOfRemovedTree).didRemoveTextTrack(*this);
> }
> 
>-void HTMLTrackElement::parseAttribute(const QualifiedName& name, const AtomicString& value)
>+void HTMLTrackElement::parseAttribute(const QualifiedName& name, const AtomString& value)
> {
> if (name == srcAttr) {
> scheduleLoad();
>@@ -118,22 +118,22 @@ void HTMLTrackElement::parseAttribute(const QualifiedName& name, const AtomicStr
> HTMLElement::parseAttribute(name, value);
> }
> 
>-const AtomicString& HTMLTrackElement::kind()
>+const AtomString& HTMLTrackElement::kind()
> {
> return track().kindKeyword();
> }
> 
>-void HTMLTrackElement::setKind(const AtomicString& kind)
>+void HTMLTrackElement::setKind(const AtomString& kind)
> {
> setAttributeWithoutSynchronization(kindAttr, kind);
> }
> 
>-const AtomicString& HTMLTrackElement::srclang() const
>+const AtomString& HTMLTrackElement::srclang() const
> {
> return attributeWithoutSynchronization(srclangAttr);
> }
> 
>-const AtomicString& HTMLTrackElement::label() const
>+const AtomString& HTMLTrackElement::label() const
> {
> return attributeWithoutSynchronization(labelAttr);
> }
>@@ -279,7 +279,7 @@ HTMLTrackElement::ReadyState HTMLTrackElement::readyState()
> return static_cast<ReadyState>(track().readinessState());
> }
> 
>-const AtomicString& HTMLTrackElement::mediaElementCrossOriginAttribute() const
>+const AtomString& HTMLTrackElement::mediaElementCrossOriginAttribute() const
> {
> if (auto parent = mediaElement())
> return parent->attributeWithoutSynchronization(HTMLNames::crossoriginAttr);
>diff --git a/Source/WebCore/html/HTMLTrackElement.h b/Source/WebCore/html/HTMLTrackElement.h
>index 9cbdadb4c48e2665ada8f2fa3179b84e6e1ba324..c95db6ea28c7ff136f694f7ab6dfe4cbc39da750 100644
>--- a/Source/WebCore/html/HTMLTrackElement.h
>+++ b/Source/WebCore/html/HTMLTrackElement.h
>@@ -40,11 +40,11 @@ class HTMLTrackElement final : public HTMLElement, public TextTrackClient {
> public:
> static Ref<HTMLTrackElement> create(const QualifiedName&, Document&);
> 
>- const AtomicString& kind();
>- void setKind(const AtomicString&);
>+ const AtomString& kind();
>+ void setKind(const AtomString&);
> 
>- const AtomicString& srclang() const;
>- const AtomicString& label() const;
>+ const AtomString& srclang() const;
>+ const AtomString& label() const;
> bool isDefault() const;
> 
> enum ReadyState { NONE = 0, LOADING = 1, LOADED = 2, TRACK_ERROR = 3 };
>@@ -59,13 +59,13 @@ public:
> void didCompleteLoad(LoadStatus);
> 
> RefPtr<HTMLMediaElement> mediaElement() const;
>- const AtomicString& mediaElementCrossOriginAttribute() const;
>+ const AtomString& mediaElementCrossOriginAttribute() const;
> 
> private:
> HTMLTrackElement(const QualifiedName&, Document&);
> virtual ~HTMLTrackElement();
> 
>- void parseAttribute(const QualifiedName&, const AtomicString&) final;
>+ void parseAttribute(const QualifiedName&, const AtomString&) final;
> 
> InsertedIntoAncestorResult insertedIntoAncestor(InsertionType, ContainerNode&) final;
> void removedFromAncestor(RemovalType, ContainerNode&) final;
>diff --git a/Source/WebCore/html/HTMLUListElement.cpp b/Source/WebCore/html/HTMLUListElement.cpp
>index d9cd6e3bcae47ccba817bbef68f4f8a3bd9c897e..570ea7fffeace269990901f64373b9f027411453 100644
>--- a/Source/WebCore/html/HTMLUListElement.cpp
>+++ b/Source/WebCore/html/HTMLUListElement.cpp
>@@ -56,7 +56,7 @@ bool HTMLUListElement::isPresentationAttribute(const QualifiedName& name) const
> return HTMLElement::isPresentationAttribute(name);
> }
> 
>-void HTMLUListElement::collectStyleForPresentationAttribute(const QualifiedName& name, const AtomicString& value, MutableStyleProperties& style)
>+void HTMLUListElement::collectStyleForPresentationAttribute(const QualifiedName& name, const AtomString& value, MutableStyleProperties& style)
> {
> if (name == typeAttr)
> addPropertyToPresentationAttributeStyle(style, CSSPropertyListStyleType, value);
>diff --git a/Source/WebCore/html/HTMLUListElement.h b/Source/WebCore/html/HTMLUListElement.h
>index 6a0b72073121ff621143abd7b1b75e9d381c6a24..b52c2030e57cc6b1146625a20975ab61aeb5e863 100644
>--- a/Source/WebCore/html/HTMLUListElement.h
>+++ b/Source/WebCore/html/HTMLUListElement.h
>@@ -36,7 +36,7 @@ private:
> HTMLUListElement(const QualifiedName&, Document&);
> 
> bool isPresentationAttribute(const QualifiedName&) const final;
>- void collectStyleForPresentationAttribute(const QualifiedName&, const AtomicString&, MutableStyleProperties&) final;
>+ void collectStyleForPresentationAttribute(const QualifiedName&, const AtomString&, MutableStyleProperties&) final;
> };
> 
> } // namespace WebCore
>diff --git a/Source/WebCore/html/HTMLVideoElement.cpp b/Source/WebCore/html/HTMLVideoElement.cpp
>index a6f2f835bb7b55aeeaf4c084ddc7a8fe91943c12..a5e75aaff52ddf9f57545ba067eec789888dd9ab 100644
>--- a/Source/WebCore/html/HTMLVideoElement.cpp
>+++ b/Source/WebCore/html/HTMLVideoElement.cpp
>@@ -101,7 +101,7 @@ void HTMLVideoElement::didAttachRenderers()
> }
> }
> 
>-void HTMLVideoElement::collectStyleForPresentationAttribute(const QualifiedName& name, const AtomicString& value, MutableStyleProperties& style)
>+void HTMLVideoElement::collectStyleForPresentationAttribute(const QualifiedName& name, const AtomString& value, MutableStyleProperties& style)
> {
> if (name == widthAttr)
> addHTMLLengthToStyle(style, CSSPropertyWidth, value);
>@@ -118,7 +118,7 @@ bool HTMLVideoElement::isPresentationAttribute(const QualifiedName& name) const
> return HTMLMediaElement::isPresentationAttribute(name);
> }
> 
>-void HTMLVideoElement::parseAttribute(const QualifiedName& name, const AtomicString& value)
>+void HTMLVideoElement::parseAttribute(const QualifiedName& name, const AtomString& value)
> {
> if (name == posterAttr) {
> // Force a poster recalc by setting m_displayMode to Unknown directly before calling updateDisplayState.
>@@ -232,9 +232,9 @@ bool HTMLVideoElement::isURLAttribute(const Attribute& attribute) const
> return attribute.name() == posterAttr || HTMLMediaElement::isURLAttribute(attribute);
> }
> 
>-const AtomicString& HTMLVideoElement::imageSourceURL() const
>+const AtomString& HTMLVideoElement::imageSourceURL() const
> {
>- const AtomicString& url = attributeWithoutSynchronization(posterAttr);
>+ const AtomString& url = attributeWithoutSynchronization(posterAttr);
> if (!stripLeadingAndTrailingHTMLSpaces(url).isEmpty())
> return url;
> return m_defaultPosterURL;
>diff --git a/Source/WebCore/html/HTMLVideoElement.h b/Source/WebCore/html/HTMLVideoElement.h
>index d4ba370b424a6961d99649a1736b597552acbcb4..1e95258fc75d232193762af5d84e6a0da4e3d0dc 100644
>--- a/Source/WebCore/html/HTMLVideoElement.h
>+++ b/Source/WebCore/html/HTMLVideoElement.h
>@@ -101,14 +101,14 @@ private:
> void scheduleResizeEventIfSizeChanged() final;
> bool rendererIsNeeded(const RenderStyle&) final;
> void didAttachRenderers() final;
>- void parseAttribute(const QualifiedName&, const AtomicString&) final;
>+ void parseAttribute(const QualifiedName&, const AtomString&) final;
> bool isPresentationAttribute(const QualifiedName&) const final;
>- void collectStyleForPresentationAttribute(const QualifiedName&, const AtomicString&, MutableStyleProperties&) final;
>+ void collectStyleForPresentationAttribute(const QualifiedName&, const AtomString&, MutableStyleProperties&) final;
> bool isVideo() const final { return true; }
> bool hasVideo() const final { return player() && player()->hasVideo(); }
> bool supportsFullscreen(HTMLMediaElementEnums::VideoFullscreenMode) const final;
> bool isURLAttribute(const Attribute&) const final;
>- const AtomicString& imageSourceURL() const final;
>+ const AtomString& imageSourceURL() const final;
> 
> bool hasAvailableVideoFrame() const;
> void updateDisplayState() final;
>@@ -119,7 +119,7 @@ private:
> 
> std::unique_ptr<HTMLImageLoader> m_imageLoader;
> 
>- AtomicString m_defaultPosterURL;
>+ AtomString m_defaultPosterURL;
> 
> unsigned m_lastReportedVideoWidth { 0 };
> unsigned m_lastReportedVideoHeight { 0 };
>diff --git a/Source/WebCore/html/HiddenInputType.cpp b/Source/WebCore/html/HiddenInputType.cpp
>index a882c8fc59394831ec804afa2c9c76b01e7bb766..14b63bf5fdb0b2e3d47296d276a862cd145e25d5 100644
>--- a/Source/WebCore/html/HiddenInputType.cpp
>+++ b/Source/WebCore/html/HiddenInputType.cpp
>@@ -43,7 +43,7 @@ namespace WebCore {
> 
> using namespace HTMLNames;
> 
>-const AtomicString& HiddenInputType::formControlType() const
>+const AtomString& HiddenInputType::formControlType() const
> {
> return InputTypeNames::hidden();
> }
>diff --git a/Source/WebCore/html/HiddenInputType.h b/Source/WebCore/html/HiddenInputType.h
>index b6307c20fbab2b90d083783491870d88b431a326..dac62848ab4cdf4c951e500b0ada80428459e3ab 100644
>--- a/Source/WebCore/html/HiddenInputType.h
>+++ b/Source/WebCore/html/HiddenInputType.h
>@@ -39,7 +39,7 @@ public:
> explicit HiddenInputType(HTMLInputElement& element) : InputType(element) { }
> 
> private:
>- const AtomicString& formControlType() const override;
>+ const AtomString& formControlType() const override;
> FormControlState saveFormControlState() const override;
> void restoreFormControlState(const FormControlState&) override;
> bool supportsValidation() const override;
>diff --git a/Source/WebCore/html/ImageInputType.cpp b/Source/WebCore/html/ImageInputType.cpp
>index 2b0f1ed66828f126a7e159a04b1cba8c08c5aaa0..5615b446df6ad102d85186e71820fd2f24bea0b5 100644
>--- a/Source/WebCore/html/ImageInputType.cpp
>+++ b/Source/WebCore/html/ImageInputType.cpp
>@@ -44,7 +44,7 @@ ImageInputType::ImageInputType(HTMLInputElement& element)
> {
> }
> 
>-const AtomicString& ImageInputType::formControlType() const
>+const AtomString& ImageInputType::formControlType() const
> {
> return InputTypeNames::image();
> }
>diff --git a/Source/WebCore/html/ImageInputType.h b/Source/WebCore/html/ImageInputType.h
>index 0e31dcf849dfe63af0339d712f3736e7831bd6a6..2678610f6cb8b9b71dca55d00e3fdb1cdb72034d 100644
>--- a/Source/WebCore/html/ImageInputType.h
>+++ b/Source/WebCore/html/ImageInputType.h
>@@ -42,7 +42,7 @@ public:
> explicit ImageInputType(HTMLInputElement&);
> 
> private:
>- const AtomicString& formControlType() const final;
>+ const AtomString& formControlType() const final;
> bool isFormDataAppendable() const final;
> bool appendFormData(DOMFormData&, bool) const final;
> bool supportsValidation() const final;
>diff --git a/Source/WebCore/html/InputMode.cpp b/Source/WebCore/html/InputMode.cpp
>index bca35b4a31ff8bd0b67ac622c26dc95defde50e5..a20eaccff9c6d05769b98d68c73f5afc1b9be6be 100644
>--- a/Source/WebCore/html/InputMode.cpp
>+++ b/Source/WebCore/html/InputMode.cpp
>@@ -30,7 +30,7 @@
> 
> namespace WebCore {
> 
>-InputMode inputModeForAttributeValue(const AtomicString& value)
>+InputMode inputModeForAttributeValue(const AtomString& value)
> {
> if (equalIgnoringASCIICase(value, InputModeNames::none()))
> return InputMode::None;
>@@ -52,7 +52,7 @@ InputMode inputModeForAttributeValue(const AtomicString& value)
> return InputMode::Unspecified;
> }
> 
>-const AtomicString& stringForInputMode(InputMode mode)
>+const AtomString& stringForInputMode(InputMode mode)
> {
> switch (mode) {
> case InputMode::Unspecified:
>@@ -80,51 +80,51 @@ const AtomicString& stringForInputMode(InputMode mode)
> 
> namespace InputModeNames {
> 
>-const AtomicString& none()
>+const AtomString& none()
> {
>- static NeverDestroyed<AtomicString> mode("none", AtomicString::ConstructFromLiteral);
>+ static NeverDestroyed<AtomString> mode("none", AtomString::ConstructFromLiteral);
> return mode;
> }
> 
>-const AtomicString& text()
>+const AtomString& text()
> {
>- static NeverDestroyed<AtomicString> mode("text", AtomicString::ConstructFromLiteral);
>+ static NeverDestroyed<AtomString> mode("text", AtomString::ConstructFromLiteral);
> return mode;
> }
> 
>-const AtomicString& tel()
>+const AtomString& tel()
> {
>- static NeverDestroyed<AtomicString> mode("tel", AtomicString::ConstructFromLiteral);
>+ static NeverDestroyed<AtomString> mode("tel", AtomString::ConstructFromLiteral);
> return mode;
> }
> 
>-const AtomicString& url()
>+const AtomString& url()
> {
>- static NeverDestroyed<AtomicString> mode("url", AtomicString::ConstructFromLiteral);
>+ static NeverDestroyed<AtomString> mode("url", AtomString::ConstructFromLiteral);
> return mode;
> }
> 
>-const AtomicString& email()
>+const AtomString& email()
> {
>- static NeverDestroyed<AtomicString> mode("email", AtomicString::ConstructFromLiteral);
>+ static NeverDestroyed<AtomString> mode("email", AtomString::ConstructFromLiteral);
> return mode;
> }
> 
>-const AtomicString& numeric()
>+const AtomString& numeric()
> {
>- static NeverDestroyed<AtomicString> mode("numeric", AtomicString::ConstructFromLiteral);
>+ static NeverDestroyed<AtomString> mode("numeric", AtomString::ConstructFromLiteral);
> return mode;
> }
> 
>-const AtomicString& decimal()
>+const AtomString& decimal()
> {
>- static NeverDestroyed<AtomicString> mode("decimal", AtomicString::ConstructFromLiteral);
>+ static NeverDestroyed<AtomString> mode("decimal", AtomString::ConstructFromLiteral);
> return mode;
> }
> 
>-const AtomicString& search()
>+const AtomString& search()
> {
>- static NeverDestroyed<AtomicString> mode("search", AtomicString::ConstructFromLiteral);
>+ static NeverDestroyed<AtomString> mode("search", AtomString::ConstructFromLiteral);
> return mode;
> }
> 
>diff --git a/Source/WebCore/html/InputMode.h b/Source/WebCore/html/InputMode.h
>index 73683701d66bec6a1d6e342d8b5923cde6beaed7..f966825f9604d935783c2bea823e7587999cd73d 100644
>--- a/Source/WebCore/html/InputMode.h
>+++ b/Source/WebCore/html/InputMode.h
>@@ -25,7 +25,7 @@
> 
> #pragma once
> 
>-#include <wtf/text/AtomicString.h>
>+#include <wtf/text/AtomString.h>
> 
> namespace WebCore {
> 
>@@ -41,19 +41,19 @@ enum class InputMode : uint8_t {
> Search
> };
> 
>-InputMode inputModeForAttributeValue(const AtomicString&);
>-const AtomicString& stringForInputMode(InputMode);
>+InputMode inputModeForAttributeValue(const AtomString&);
>+const AtomString& stringForInputMode(InputMode);
> 
> namespace InputModeNames {
> 
>-const AtomicString& none();
>-const AtomicString& text();
>-const AtomicString& tel();
>-const AtomicString& url();
>-const AtomicString& email();
>-const AtomicString& numeric();
>-const AtomicString& decimal();
>-const AtomicString& search();
>+const AtomString& none();
>+const AtomString& text();
>+const AtomString& tel();
>+const AtomString& url();
>+const AtomString& email();
>+const AtomString& numeric();
>+const AtomString& decimal();
>+const AtomString& search();
> 
> } // namespace InputModeNames
> 
>diff --git a/Source/WebCore/html/InputType.cpp b/Source/WebCore/html/InputType.cpp
>index 04d325db07865f9b8ba09281a5a9a05ba6eee9f7..2198b8344c1d10f78ba0adb5650427c9a0eb729a 100644
>--- a/Source/WebCore/html/InputType.cpp
>+++ b/Source/WebCore/html/InputType.cpp
>@@ -84,9 +84,9 @@ namespace WebCore {
> using namespace HTMLNames;
> 
> typedef bool (RuntimeEnabledFeatures::*InputTypeConditionalFunction)() const;
>-typedef const AtomicString& (*InputTypeNameFunction)();
>+typedef const AtomString& (*InputTypeNameFunction)();
> typedef Ref<InputType> (*InputTypeFactoryFunction)(HTMLInputElement&);
>-typedef HashMap<AtomicString, InputTypeFactoryFunction, ASCIICaseInsensitiveHash> InputTypeFactoryMap;
>+typedef HashMap<AtomString, InputTypeFactoryFunction, ASCIICaseInsensitiveHash> InputTypeFactoryMap;
> 
> template<class T>
> static Ref<InputType> createInputType(HTMLInputElement& element)
>@@ -149,7 +149,7 @@ static InputTypeFactoryMap createInputTypeFactoryMap()
> return map;
> }
> 
>-Ref<InputType> InputType::create(HTMLInputElement& element, const AtomicString& typeName)
>+Ref<InputType> InputType::create(HTMLInputElement& element, const AtomString& typeName)
> {
> if (!typeName.isEmpty()) {
> static const auto factoryMap = makeNeverDestroyed(createInputTypeFactoryMap());
>diff --git a/Source/WebCore/html/InputType.h b/Source/WebCore/html/InputType.h
>index 643b59e47aa2cdd5207e44d26003e1e7e47ced45..665e66cf5a08633716696772023abab70894bebb 100644
>--- a/Source/WebCore/html/InputType.h
>+++ b/Source/WebCore/html/InputType.h
>@@ -73,7 +73,7 @@ class InputType : public RefCounted<InputType> {
> WTF_MAKE_FAST_ALLOCATED;
> 
> public:
>- static Ref<InputType> create(HTMLInputElement&, const AtomicString&);
>+ static Ref<InputType> create(HTMLInputElement&, const AtomString&);
> static Ref<InputType> createText(HTMLInputElement&);
> virtual ~InputType();
> 
>@@ -81,7 +81,7 @@ public:
> 
> static bool themeSupportsDataListUI(InputType*);
> 
>- virtual const AtomicString& formControlType() const = 0;
>+ virtual const AtomString& formControlType() const = 0;
> 
> // Type query functions.
> 
>diff --git a/Source/WebCore/html/InputTypeNames.cpp b/Source/WebCore/html/InputTypeNames.cpp
>index 4387618c78400a6b6d6a60b1913fae06a2d43bba..a8a6e79dcc68b296bfd87197ccf4b46e9a7f9ee4 100644
>--- a/Source/WebCore/html/InputTypeNames.cpp
>+++ b/Source/WebCore/html/InputTypeNames.cpp
>@@ -31,141 +31,141 @@ namespace InputTypeNames {
> // The type names must be lowercased because they will be the return values of
> // input.type and input.type must be lowercase according to DOM Level 2.
> 
>-const AtomicString& button()
>+const AtomString& button()
> {
>- static NeverDestroyed<AtomicString> name("button", AtomicString::ConstructFromLiteral);
>+ static NeverDestroyed<AtomString> name("button", AtomString::ConstructFromLiteral);
> return name;
> }
> 
>-const AtomicString& checkbox()
>+const AtomString& checkbox()
> {
>- static NeverDestroyed<AtomicString> name("checkbox", AtomicString::ConstructFromLiteral);
>+ static NeverDestroyed<AtomString> name("checkbox", AtomString::ConstructFromLiteral);
> return name;
> }
> 
>-const AtomicString& color()
>+const AtomString& color()
> {
>- static NeverDestroyed<AtomicString> name("color", AtomicString::ConstructFromLiteral);
>+ static NeverDestroyed<AtomString> name("color", AtomString::ConstructFromLiteral);
> return name;
> }
> 
>-const AtomicString& date()
>+const AtomString& date()
> {
>- static NeverDestroyed<AtomicString> name("date", AtomicString::ConstructFromLiteral);
>+ static NeverDestroyed<AtomString> name("date", AtomString::ConstructFromLiteral);
> return name;
> }
> 
>-const AtomicString& datetime()
>+const AtomString& datetime()
> {
>- static NeverDestroyed<AtomicString> name("datetime", AtomicString::ConstructFromLiteral);
>+ static NeverDestroyed<AtomString> name("datetime", AtomString::ConstructFromLiteral);
> return name;
> }
> 
>-const AtomicString& datetimelocal()
>+const AtomString& datetimelocal()
> {
>- static NeverDestroyed<AtomicString> name("datetime-local", AtomicString::ConstructFromLiteral);
>+ static NeverDestroyed<AtomString> name("datetime-local", AtomString::ConstructFromLiteral);
> return name;
> }
> 
>-const AtomicString& email()
>+const AtomString& email()
> {
>- static NeverDestroyed<AtomicString> name("email", AtomicString::ConstructFromLiteral);
>+ static NeverDestroyed<AtomString> name("email", AtomString::ConstructFromLiteral);
> return name;
> }
> 
>-const AtomicString& file()
>+const AtomString& file()
> {
>- static NeverDestroyed<AtomicString> name("file", AtomicString::ConstructFromLiteral);
>+ static NeverDestroyed<AtomString> name("file", AtomString::ConstructFromLiteral);
> return name;
> }
> 
>-const AtomicString& hidden()
>+const AtomString& hidden()
> {
>- static NeverDestroyed<AtomicString> name("hidden", AtomicString::ConstructFromLiteral);
>+ static NeverDestroyed<AtomString> name("hidden", AtomString::ConstructFromLiteral);
> return name;
> }
> 
>-const AtomicString& image()
>+const AtomString& image()
> {
>- static NeverDestroyed<AtomicString> name("image", AtomicString::ConstructFromLiteral);
>+ static NeverDestroyed<AtomString> name("image", AtomString::ConstructFromLiteral);
> return name;
> }
> 
>-const AtomicString& month()
>+const AtomString& month()
> {
>- static NeverDestroyed<AtomicString> name("month", AtomicString::ConstructFromLiteral);
>+ static NeverDestroyed<AtomString> name("month", AtomString::ConstructFromLiteral);
> return name;
> }
> 
>-const AtomicString& number()
>+const AtomString& number()
> {
>- static NeverDestroyed<AtomicString> name("number", AtomicString::ConstructFromLiteral);
>+ static NeverDestroyed<AtomString> name("number", AtomString::ConstructFromLiteral);
> return name;
> }
> 
>-const AtomicString& password()
>+const AtomString& password()
> {
>- static NeverDestroyed<AtomicString> name("password", AtomicString::ConstructFromLiteral);
>+ static NeverDestroyed<AtomString> name("password", AtomString::ConstructFromLiteral);
> return name;
> }
> 
>-const AtomicString& radio()
>+const AtomString& radio()
> {
>- static NeverDestroyed<AtomicString> name("radio", AtomicString::ConstructFromLiteral);
>+ static NeverDestroyed<AtomString> name("radio", AtomString::ConstructFromLiteral);
> return name;
> }
> 
>-const AtomicString& range()
>+const AtomString& range()
> {
>- static NeverDestroyed<AtomicString> name("range", AtomicString::ConstructFromLiteral);
>+ static NeverDestroyed<AtomString> name("range", AtomString::ConstructFromLiteral);
> return name;
> }
> 
>-const AtomicString& reset()
>+const AtomString& reset()
> {
>- static NeverDestroyed<AtomicString> name("reset", AtomicString::ConstructFromLiteral);
>+ static NeverDestroyed<AtomString> name("reset", AtomString::ConstructFromLiteral);
> return name;
> }
> 
>-const AtomicString& search()
>+const AtomString& search()
> {
>- static NeverDestroyed<AtomicString> name("search", AtomicString::ConstructFromLiteral);
>+ static NeverDestroyed<AtomString> name("search", AtomString::ConstructFromLiteral);
> return name;
> }
> 
>-const AtomicString& submit()
>+const AtomString& submit()
> {
>- static NeverDestroyed<AtomicString> name("submit", AtomicString::ConstructFromLiteral);
>+ static NeverDestroyed<AtomString> name("submit", AtomString::ConstructFromLiteral);
> return name;
> }
> 
>-const AtomicString& telephone()
>+const AtomString& telephone()
> {
>- static NeverDestroyed<AtomicString> name("tel", AtomicString::ConstructFromLiteral);
>+ static NeverDestroyed<AtomString> name("tel", AtomString::ConstructFromLiteral);
> return name;
> }
> 
>-const AtomicString& text()
>+const AtomString& text()
> {
>- static NeverDestroyed<AtomicString> name("text", AtomicString::ConstructFromLiteral);
>+ static NeverDestroyed<AtomString> name("text", AtomString::ConstructFromLiteral);
> return name;
> }
> 
>-const AtomicString& time()
>+const AtomString& time()
> {
>- static NeverDestroyed<AtomicString> name("time", AtomicString::ConstructFromLiteral);
>+ static NeverDestroyed<AtomString> name("time", AtomString::ConstructFromLiteral);
> return name;
> }
> 
>-const AtomicString& url()
>+const AtomString& url()
> {
>- static NeverDestroyed<AtomicString> name("url", AtomicString::ConstructFromLiteral);
>+ static NeverDestroyed<AtomString> name("url", AtomString::ConstructFromLiteral);
> return name;
> }
> 
>-const AtomicString& week()
>+const AtomString& week()
> {
>- static NeverDestroyed<AtomicString> name("week", AtomicString::ConstructFromLiteral);
>+ static NeverDestroyed<AtomString> name("week", AtomString::ConstructFromLiteral);
> return name;
> }
> 
>diff --git a/Source/WebCore/html/InputTypeNames.h b/Source/WebCore/html/InputTypeNames.h
>index 470030623a87eae03aa5d3e9aa65700d103b8e28..241ec28ba8f53569d3ae47c411f7ea145b7c4939 100644
>--- a/Source/WebCore/html/InputTypeNames.h
>+++ b/Source/WebCore/html/InputTypeNames.h
>@@ -20,35 +20,35 @@
> 
> #pragma once
> 
>-#include <wtf/text/AtomicString.h>
>+#include <wtf/text/AtomString.h>
> 
> namespace WebCore {
> 
> namespace InputTypeNames {
> 
>-const AtomicString& button();
>-const AtomicString& checkbox();
>-const AtomicString& color();
>-const AtomicString& date();
>-const AtomicString& datetime();
>-const AtomicString& datetimelocal();
>-const AtomicString& email();
>-const AtomicString& file();
>-const AtomicString& hidden();
>-const AtomicString& image();
>-const AtomicString& month();
>-const AtomicString& number();
>-const AtomicString& password();
>-const AtomicString& radio();
>-const AtomicString& range();
>-const AtomicString& reset();
>-const AtomicString& search();
>-const AtomicString& submit();
>-const AtomicString& telephone();
>-const AtomicString& text();
>-const AtomicString& time();
>-const AtomicString& url();
>-const AtomicString& week();
>+const AtomString& button();
>+const AtomString& checkbox();
>+const AtomString& color();
>+const AtomString& date();
>+const AtomString& datetime();
>+const AtomString& datetimelocal();
>+const AtomString& email();
>+const AtomString& file();
>+const AtomString& hidden();
>+const AtomString& image();
>+const AtomString& month();
>+const AtomString& number();
>+const AtomString& password();
>+const AtomString& radio();
>+const AtomString& range();
>+const AtomString& reset();
>+const AtomString& search();
>+const AtomString& submit();
>+const AtomString& telephone();
>+const AtomString& text();
>+const AtomString& time();
>+const AtomString& url();
>+const AtomString& week();
> 
> }
> 
>diff --git a/Source/WebCore/html/LabelsNodeList.h b/Source/WebCore/html/LabelsNodeList.h
>index e7d7d165c22c8303100472aff5133200c8fd3aa6..f539d79b0caa0500304888dc461772af7db16282 100644
>--- a/Source/WebCore/html/LabelsNodeList.h
>+++ b/Source/WebCore/html/LabelsNodeList.h
>@@ -32,7 +32,7 @@ namespace WebCore {
> class LabelsNodeList final : public CachedLiveNodeList<LabelsNodeList> {
> WTF_MAKE_ISO_ALLOCATED(LabelsNodeList);
> public:
>- static Ref<LabelsNodeList> create(LabelableElement& forNode, const AtomicString&)
>+ static Ref<LabelsNodeList> create(LabelableElement& forNode, const AtomString&)
> {
> return adoptRef(*new LabelsNodeList(forNode));
> }
>diff --git a/Source/WebCore/html/MediaController.cpp b/Source/WebCore/html/MediaController.cpp
>index 51fa658c49100a9765f961de69c844d141e68e86..e482b362b18a7a549453764644ccfe7cbf5152b3 100644
>--- a/Source/WebCore/html/MediaController.cpp
>+++ b/Source/WebCore/html/MediaController.cpp
>@@ -35,7 +35,7 @@
> #include <wtf/IsoMallocInlines.h>
> #include <wtf/NeverDestroyed.h>
> #include <wtf/StdLibExtras.h>
>-#include <wtf/text/AtomicString.h>
>+#include <wtf/text/AtomString.h>
> 
> namespace WebCore {
> 
>@@ -287,25 +287,25 @@ void MediaController::setMuted(bool flag)
> mediaElement->updateVolume();
> }
> 
>-static const AtomicString& playbackStateWaiting()
>+static const AtomString& playbackStateWaiting()
> {
>- static NeverDestroyed<AtomicString> waiting("waiting", AtomicString::ConstructFromLiteral);
>+ static NeverDestroyed<AtomString> waiting("waiting", AtomString::ConstructFromLiteral);
> return waiting;
> }
> 
>-static const AtomicString& playbackStatePlaying()
>+static const AtomString& playbackStatePlaying()
> {
>- static NeverDestroyed<AtomicString> playing("playing", AtomicString::ConstructFromLiteral);
>+ static NeverDestroyed<AtomString> playing("playing", AtomString::ConstructFromLiteral);
> return playing;
> }
> 
>-static const AtomicString& playbackStateEnded()
>+static const AtomString& playbackStateEnded()
> {
>- static NeverDestroyed<AtomicString> ended("ended", AtomicString::ConstructFromLiteral);
>+ static NeverDestroyed<AtomString> ended("ended", AtomString::ConstructFromLiteral);
> return ended;
> }
> 
>-const AtomicString& MediaController::playbackState() const
>+const AtomString& MediaController::playbackState() const
> {
> switch (m_playbackState) {
> case WAITING:
>@@ -326,7 +326,7 @@ void MediaController::reportControllerState()
> updatePlaybackState();
> }
> 
>-static AtomicString eventNameForReadyState(MediaControllerInterface::ReadyState state)
>+static AtomString eventNameForReadyState(MediaControllerInterface::ReadyState state)
> {
> switch (state) {
> case MediaControllerInterface::HAVE_NOTHING:
>@@ -436,7 +436,7 @@ void MediaController::updatePlaybackState()
> // If the MediaController's most recently reported playback state is not equal to new playback state
> // then queue a task to fire a simple event at the MediaController object, whose name is playing 
> // if new playback state is playing, ended if new playback state is ended, and waiting otherwise.
>- AtomicString eventName;
>+ AtomString eventName;
> switch (newPlaybackState) {
> case WAITING:
> eventName = eventNames().waitingEvent;
>@@ -533,7 +533,7 @@ bool MediaController::hasEnded() const
> return allHaveEnded;
> }
> 
>-void MediaController::scheduleEvent(const AtomicString& eventName)
>+void MediaController::scheduleEvent(const AtomString& eventName)
> {
> m_pendingEvents.append(Event::create(eventName, Event::CanBubble::No, Event::IsCancelable::Yes));
> if (!m_asyncEventTimer.isActive())
>diff --git a/Source/WebCore/html/MediaController.h b/Source/WebCore/html/MediaController.h
>index e522c8ae329c36db9ba59e294c483bb7ced47a44..538dc2e78229447d9761a837f5e29649c810daeb 100644
>--- a/Source/WebCore/html/MediaController.h
>+++ b/Source/WebCore/html/MediaController.h
>@@ -72,7 +72,7 @@ public:
> bool muted() const final { return m_muted; }
> void setMuted(bool) final;
> 
>- const AtomicString& playbackState() const;
>+ const AtomString& playbackState() const;
> 
> using RefCounted::ref;
> using RefCounted::deref;
>@@ -85,7 +85,7 @@ private:
> void updatePlaybackState();
> void updateMediaElements();
> void bringElementUpToSpeed(HTMLMediaElement&);
>- void scheduleEvent(const AtomicString& eventName);
>+ void scheduleEvent(const AtomString& eventName);
> void asyncEventTimerFired();
> void clearPositionTimerFired();
> bool hasEnded() const;
>diff --git a/Source/WebCore/html/MediaDocument.cpp b/Source/WebCore/html/MediaDocument.cpp
>index 03562e7f91cf5317855577526e7130ad6733f8ef..aaed5ae23d2881047d152745c7ef85a9984838e0 100644
>--- a/Source/WebCore/html/MediaDocument.cpp
>+++ b/Source/WebCore/html/MediaDocument.cpp
>@@ -100,8 +100,8 @@ void MediaDocumentParser::createDocumentStructure()
> rootElement->appendChild(headElement);
> 
> auto metaElement = HTMLMetaElement::create(document);
>- metaElement->setAttributeWithoutSynchronization(nameAttr, AtomicString("viewport", AtomicString::ConstructFromLiteral));
>- metaElement->setAttributeWithoutSynchronization(contentAttr, AtomicString("width=device-width,initial-scale=1", AtomicString::ConstructFromLiteral));
>+ metaElement->setAttributeWithoutSynchronization(nameAttr, AtomString("viewport", AtomString::ConstructFromLiteral));
>+ metaElement->setAttributeWithoutSynchronization(contentAttr, AtomString("width=device-width,initial-scale=1", AtomString::ConstructFromLiteral));
> headElement->appendChild(metaElement);
> #endif
> 
>@@ -245,15 +245,15 @@ void MediaDocument::replaceMediaElementTimerFired()
> return;
> 
> // Set body margin width and height to 0 as that is what a PluginDocument uses.
>- htmlBody->setAttributeWithoutSynchronization(marginwidthAttr, AtomicString("0", AtomicString::ConstructFromLiteral));
>- htmlBody->setAttributeWithoutSynchronization(marginheightAttr, AtomicString("0", AtomicString::ConstructFromLiteral));
>+ htmlBody->setAttributeWithoutSynchronization(marginwidthAttr, AtomString("0", AtomString::ConstructFromLiteral));
>+ htmlBody->setAttributeWithoutSynchronization(marginheightAttr, AtomString("0", AtomString::ConstructFromLiteral));
> 
> if (auto videoElement = makeRefPtr(descendantVideoElement(*htmlBody))) {
> auto embedElement = HTMLEmbedElement::create(*this);
> 
>- embedElement->setAttributeWithoutSynchronization(widthAttr, AtomicString("100%", AtomicString::ConstructFromLiteral));
>- embedElement->setAttributeWithoutSynchronization(heightAttr, AtomicString("100%", AtomicString::ConstructFromLiteral));
>- embedElement->setAttributeWithoutSynchronization(nameAttr, AtomicString("plugin", AtomicString::ConstructFromLiteral));
>+ embedElement->setAttributeWithoutSynchronization(widthAttr, AtomString("100%", AtomString::ConstructFromLiteral));
>+ embedElement->setAttributeWithoutSynchronization(heightAttr, AtomString("100%", AtomString::ConstructFromLiteral));
>+ embedElement->setAttributeWithoutSynchronization(nameAttr, AtomString("plugin", AtomString::ConstructFromLiteral));
> embedElement->setAttributeWithoutSynchronization(srcAttr, url().string());
> 
> ASSERT(loader());
>diff --git a/Source/WebCore/html/MediaEncryptedEvent.cpp b/Source/WebCore/html/MediaEncryptedEvent.cpp
>index 48bb5a2f1fa85408dd918a767532365b38e612f6..f6e4ef8f7eb50e33c0df2e07dc3449600a30c9f6 100644
>--- a/Source/WebCore/html/MediaEncryptedEvent.cpp
>+++ b/Source/WebCore/html/MediaEncryptedEvent.cpp
>@@ -35,7 +35,7 @@
> 
> namespace WebCore {
> 
>-MediaEncryptedEvent::MediaEncryptedEvent(const AtomicString& type, const MediaEncryptedEventInit& initializer, IsTrusted isTrusted)
>+MediaEncryptedEvent::MediaEncryptedEvent(const AtomString& type, const MediaEncryptedEventInit& initializer, IsTrusted isTrusted)
> : Event(type, initializer, isTrusted)
> , m_initDataType(initializer.initDataType)
> , m_initData(initializer.initData)
>diff --git a/Source/WebCore/html/MediaEncryptedEvent.h b/Source/WebCore/html/MediaEncryptedEvent.h
>index b5219c1d0ce089570be1a97e895e9e898fa6f88f..45b344ebe7b2733c3340eb58a182defe46b1c6ba 100644
>--- a/Source/WebCore/html/MediaEncryptedEvent.h
>+++ b/Source/WebCore/html/MediaEncryptedEvent.h
>@@ -43,7 +43,7 @@ class MediaEncryptedEvent final : public Event {
> public:
> using Init = MediaEncryptedEventInit;
> 
>- static Ref<MediaEncryptedEvent> create(const AtomicString& type, const MediaEncryptedEventInit& initializer, IsTrusted isTrusted = IsTrusted::No)
>+ static Ref<MediaEncryptedEvent> create(const AtomString& type, const MediaEncryptedEventInit& initializer, IsTrusted isTrusted = IsTrusted::No)
> {
> return adoptRef(*new MediaEncryptedEvent(type, initializer, isTrusted));
> }
>@@ -54,7 +54,7 @@ public:
> JSC::ArrayBuffer* initData() { return m_initData.get(); }
> 
> private:
>- MediaEncryptedEvent(const AtomicString&, const MediaEncryptedEventInit&, IsTrusted);
>+ MediaEncryptedEvent(const AtomString&, const MediaEncryptedEventInit&, IsTrusted);
> 
> // Event
> EventInterface eventInterface() const override;
>diff --git a/Source/WebCore/html/MonthInputType.cpp b/Source/WebCore/html/MonthInputType.cpp
>index f92b35535a1d6ea23367a696052f18a23f1e24e1..73ea6760688fccc411dfd0783acfc630963126f3 100644
>--- a/Source/WebCore/html/MonthInputType.cpp
>+++ b/Source/WebCore/html/MonthInputType.cpp
>@@ -48,7 +48,7 @@ static const int monthDefaultStepBase = 0;
> static const int monthStepScaleFactor = 1;
> static const StepRange::StepDescription monthStepDescription { monthDefaultStep, monthDefaultStepBase, monthStepScaleFactor, StepRange::ParsedStepValueShouldBeInteger };
> 
>-const AtomicString& MonthInputType::formControlType() const
>+const AtomString& MonthInputType::formControlType() const
> {
> return InputTypeNames::month();
> }
>diff --git a/Source/WebCore/html/MonthInputType.h b/Source/WebCore/html/MonthInputType.h
>index 205621f29fe7d54336064538ab04afb975ea23f1..acf958861367a73a1c4dec2c89792b86223e83ae 100644
>--- a/Source/WebCore/html/MonthInputType.h
>+++ b/Source/WebCore/html/MonthInputType.h
>@@ -41,7 +41,7 @@ public:
> explicit MonthInputType(HTMLInputElement& element) : BaseChooserOnlyDateAndTimeInputType(element) { }
> 
> private:
>- const AtomicString& formControlType() const override;
>+ const AtomString& formControlType() const override;
> DateComponents::Type dateType() const override;
> double valueAsDate() const override;
> String serializeWithMilliseconds(double) const override;
>diff --git a/Source/WebCore/html/NumberInputType.cpp b/Source/WebCore/html/NumberInputType.cpp
>index 05ff07d86883c1b2c60319a0c5da43f47768abc8..aa2ed2e3887ecef334d932883a663177b828cc1d 100644
>--- a/Source/WebCore/html/NumberInputType.cpp
>+++ b/Source/WebCore/html/NumberInputType.cpp
>@@ -86,7 +86,7 @@ static RealNumberRenderSize calculateRenderSize(const Decimal& value)
> return { sizeOfSign + sizeOfZero , numberOfZeroAfterDecimalPoint + sizeOfDigits };
> }
> 
>-const AtomicString& NumberInputType::formControlType() const
>+const AtomString& NumberInputType::formControlType() const
> {
> return InputTypeNames::number();
> }
>@@ -151,7 +151,7 @@ StepRange NumberInputType::createStepRange(AnyStepHandling anyStepHandling) cons
> 
> RangeLimitations rangeLimitations = RangeLimitations::Invalid;
> auto extractBound = [&] (const QualifiedName& attributeName, const Decimal& defaultValue) -> Decimal {
>- const AtomicString& attributeValue = element.attributeWithoutSynchronization(attributeName);
>+ const AtomString& attributeValue = element.attributeWithoutSynchronization(attributeName);
> Decimal valueFromAttribute = parseToNumberOrNaN(attributeValue);
> if (valueFromAttribute.isFinite()) {
> rangeLimitations = RangeLimitations::Valid;
>diff --git a/Source/WebCore/html/NumberInputType.h b/Source/WebCore/html/NumberInputType.h
>index fed1aba035fc5870fc3eff60af2fc83737ca614b..de51a4a30d5300db252d820976cac2d24a15e070 100644
>--- a/Source/WebCore/html/NumberInputType.h
>+++ b/Source/WebCore/html/NumberInputType.h
>@@ -40,7 +40,7 @@ public:
> explicit NumberInputType(HTMLInputElement& element) : TextFieldInputType(element) { }
> 
> private:
>- const AtomicString& formControlType() const final;
>+ const AtomString& formControlType() const final;
> void setValue(const String&, bool valueChanged, TextFieldEventBehavior) final;
> double valueAsDouble() const final;
> ExceptionOr<void> setValueAsDouble(double, TextFieldEventBehavior) const final;
>diff --git a/Source/WebCore/html/PasswordInputType.cpp b/Source/WebCore/html/PasswordInputType.cpp
>index af2e38cf347cce10e3742ff41577b4ebec3f85b1..f7b975e1d19fde6f566f6abc1c1a04a9fe098cdf 100644
>--- a/Source/WebCore/html/PasswordInputType.cpp
>+++ b/Source/WebCore/html/PasswordInputType.cpp
>@@ -39,7 +39,7 @@
> 
> namespace WebCore {
> 
>-const AtomicString& PasswordInputType::formControlType() const
>+const AtomString& PasswordInputType::formControlType() const
> {
> return InputTypeNames::password();
> }
>diff --git a/Source/WebCore/html/PasswordInputType.h b/Source/WebCore/html/PasswordInputType.h
>index 1e0f5e34c6713a47b3c73ef6e7149a7f1c04a3b6..d4fd0cf2255b2025ea1c2ac34173623536c29cdc 100644
>--- a/Source/WebCore/html/PasswordInputType.h
>+++ b/Source/WebCore/html/PasswordInputType.h
>@@ -39,7 +39,7 @@ public:
> explicit PasswordInputType(HTMLInputElement& element) : BaseTextInputType(element) { }
> 
> private:
>- const AtomicString& formControlType() const override;
>+ const AtomString& formControlType() const override;
> bool shouldSaveAndRestoreFormControlState() const override;
> FormControlState saveFormControlState() const override;
> void restoreFormControlState(const FormControlState&) override;
>diff --git a/Source/WebCore/html/PluginDocument.cpp b/Source/WebCore/html/PluginDocument.cpp
>index 50e19df777c25fb8f54e202f2d2b5efa52af55ea..a7ac2f7c775c4afdee890bd3ddf6d2232f2dd20a 100644
>--- a/Source/WebCore/html/PluginDocument.cpp
>+++ b/Source/WebCore/html/PluginDocument.cpp
>@@ -82,12 +82,12 @@ void PluginDocumentParser::createDocumentStructure()
> #endif
> 
> auto body = HTMLBodyElement::create(document);
>- body->setAttributeWithoutSynchronization(marginwidthAttr, AtomicString("0", AtomicString::ConstructFromLiteral));
>- body->setAttributeWithoutSynchronization(marginheightAttr, AtomicString("0", AtomicString::ConstructFromLiteral));
>+ body->setAttributeWithoutSynchronization(marginwidthAttr, AtomString("0", AtomString::ConstructFromLiteral));
>+ body->setAttributeWithoutSynchronization(marginheightAttr, AtomString("0", AtomString::ConstructFromLiteral));
> #if PLATFORM(IOS_FAMILY)
>- body->setAttribute(styleAttr, AtomicString("background-color: rgb(217,224,233)", AtomicString::ConstructFromLiteral));
>+ body->setAttribute(styleAttr, AtomString("background-color: rgb(217,224,233)", AtomString::ConstructFromLiteral));
> #else
>- body->setAttribute(styleAttr, AtomicString("background-color: rgb(38,38,38)", AtomicString::ConstructFromLiteral));
>+ body->setAttribute(styleAttr, AtomString("background-color: rgb(38,38,38)", AtomString::ConstructFromLiteral));
> #endif
> 
> rootElement->appendChild(body);
>@@ -95,10 +95,10 @@ void PluginDocumentParser::createDocumentStructure()
> auto embedElement = HTMLEmbedElement::create(document);
> 
> m_embedElement = embedElement.ptr();
>- embedElement->setAttributeWithoutSynchronization(widthAttr, AtomicString("100%", AtomicString::ConstructFromLiteral));
>- embedElement->setAttributeWithoutSynchronization(heightAttr, AtomicString("100%", AtomicString::ConstructFromLiteral));
>+ embedElement->setAttributeWithoutSynchronization(widthAttr, AtomString("100%", AtomString::ConstructFromLiteral));
>+ embedElement->setAttributeWithoutSynchronization(heightAttr, AtomString("100%", AtomString::ConstructFromLiteral));
> 
>- embedElement->setAttributeWithoutSynchronization(nameAttr, AtomicString("plugin", AtomicString::ConstructFromLiteral));
>+ embedElement->setAttributeWithoutSynchronization(nameAttr, AtomString("plugin", AtomString::ConstructFromLiteral));
> embedElement->setAttributeWithoutSynchronization(srcAttr, document.url().string());
> 
> ASSERT(document.loader());
>diff --git a/Source/WebCore/html/RadioInputType.cpp b/Source/WebCore/html/RadioInputType.cpp
>index ac9a9c254681b1d331c7e4da40b42ad9ac534875..319f2572d128094e95ab024318e71ae4a4beb04d 100644
>--- a/Source/WebCore/html/RadioInputType.cpp
>+++ b/Source/WebCore/html/RadioInputType.cpp
>@@ -37,7 +37,7 @@ namespace WebCore {
> 
> using namespace HTMLNames;
> 
>-const AtomicString& RadioInputType::formControlType() const
>+const AtomString& RadioInputType::formControlType() const
> {
> return InputTypeNames::radio();
> }
>diff --git a/Source/WebCore/html/RadioInputType.h b/Source/WebCore/html/RadioInputType.h
>index 720dd4e44ea2001d3af1d32f45edc4807359966a..702c27fc4bcf367723a1b2edb299e49e6b461088 100644
>--- a/Source/WebCore/html/RadioInputType.h
>+++ b/Source/WebCore/html/RadioInputType.h
>@@ -40,7 +40,7 @@ public:
> explicit RadioInputType(HTMLInputElement& element) : BaseCheckableInputType(element) { }
> 
> private:
>- const AtomicString& formControlType() const final;
>+ const AtomString& formControlType() const final;
> bool valueMissing(const String&) const final;
> String valueMissingText() const final;
> void handleClickEvent(MouseEvent&) final;
>diff --git a/Source/WebCore/html/RadioNodeList.cpp b/Source/WebCore/html/RadioNodeList.cpp
>index a94f637933f2badff4991407fc84b2933baa2947..4c980fb3630feac77f8641620c3692a1ee7478be 100644
>--- a/Source/WebCore/html/RadioNodeList.cpp
>+++ b/Source/WebCore/html/RadioNodeList.cpp
>@@ -40,7 +40,7 @@ using namespace HTMLNames;
> 
> WTF_MAKE_ISO_ALLOCATED_IMPL(RadioNodeList);
> 
>-RadioNodeList::RadioNodeList(ContainerNode& rootNode, const AtomicString& name)
>+RadioNodeList::RadioNodeList(ContainerNode& rootNode, const AtomString& name)
> : CachedLiveNodeList(rootNode, InvalidateForFormControls)
> , m_name(name)
> , m_isRootedAtDocument(is<HTMLFormElement>(ownerNode()))
>diff --git a/Source/WebCore/html/RadioNodeList.h b/Source/WebCore/html/RadioNodeList.h
>index e0e336b05ccf7384c4fc345df78c1a7b70d76a96..a30276330c7fdb6ccf62b218e7b172d023d8a6a3 100644
>--- a/Source/WebCore/html/RadioNodeList.h
>+++ b/Source/WebCore/html/RadioNodeList.h
>@@ -28,14 +28,14 @@
> 
> #include "HTMLElement.h"
> #include "LiveNodeList.h"
>-#include <wtf/text/AtomicString.h>
>+#include <wtf/text/AtomString.h>
> 
> namespace WebCore {
> 
> class RadioNodeList final : public CachedLiveNodeList<RadioNodeList> {
> WTF_MAKE_ISO_ALLOCATED(RadioNodeList);
> public:
>- static Ref<RadioNodeList> create(ContainerNode& rootNode, const AtomicString& name)
>+ static Ref<RadioNodeList> create(ContainerNode& rootNode, const AtomString& name)
> {
> return adoptRef(*new RadioNodeList(rootNode, name));
> }
>@@ -51,10 +51,10 @@ public:
> bool isRootedAtDocument() const override { return m_isRootedAtDocument; }
> 
> private:
>- RadioNodeList(ContainerNode&, const AtomicString& name);
>+ RadioNodeList(ContainerNode&, const AtomString& name);
> bool checkElementMatchesRadioNodeListFilter(const Element&) const;
> 
>- AtomicString m_name;
>+ AtomString m_name;
> bool m_isRootedAtDocument;
> };
> 
>diff --git a/Source/WebCore/html/RangeInputType.cpp b/Source/WebCore/html/RangeInputType.cpp
>index 16df1d5a4a3b605aa2e82a04cda1adb37f0402ab..1e0f8be83a07d3eca7b9c43e660eec047c61c1ff 100644
>--- a/Source/WebCore/html/RangeInputType.cpp
>+++ b/Source/WebCore/html/RangeInputType.cpp
>@@ -86,7 +86,7 @@ bool RangeInputType::isRangeControl() const
> return true;
> }
> 
>-const AtomicString& RangeInputType::formControlType() const
>+const AtomString& RangeInputType::formControlType() const
> {
> return InputTypeNames::range();
> }
>@@ -120,7 +120,7 @@ StepRange RangeInputType::createStepRange(AnyStepHandling anyStepHandling) const
> const Decimal minimum = parseToNumber(element()->attributeWithoutSynchronization(minAttr), rangeDefaultMinimum);
> const Decimal maximum = ensureMaximum(parseToNumber(element()->attributeWithoutSynchronization(maxAttr), rangeDefaultMaximum), minimum, rangeDefaultMaximum);
> 
>- const AtomicString& precisionValue = element()->attributeWithoutSynchronization(precisionAttr);
>+ const AtomString& precisionValue = element()->attributeWithoutSynchronization(precisionAttr);
> if (!precisionValue.isNull()) {
> const Decimal step = equalLettersIgnoringASCIICase(precisionValue, "float") ? Decimal::nan() : 1;
> return StepRange(minimum, RangeLimitations::Valid, minimum, maximum, step, rangeStepDescription);
>@@ -260,7 +260,7 @@ void RangeInputType::createShadowSubtree()
> 
> Document& document = element()->document();
> auto track = HTMLDivElement::create(document);
>- track->setPseudo(AtomicString("-webkit-slider-runnable-track", AtomicString::ConstructFromLiteral));
>+ track->setPseudo(AtomString("-webkit-slider-runnable-track", AtomString::ConstructFromLiteral));
> track->appendChild(SliderThumbElement::create(document));
> auto container = SliderContainerElement::create(document);
> container->appendChild(track);
>diff --git a/Source/WebCore/html/RangeInputType.h b/Source/WebCore/html/RangeInputType.h
>index 08666f50e19f8b2e905ef1006969646f7cfa7f6e..32c88e769d0e1d44b7738bd6c23641aa3b5183fc 100644
>--- a/Source/WebCore/html/RangeInputType.h
>+++ b/Source/WebCore/html/RangeInputType.h
>@@ -43,7 +43,7 @@ public:
> 
> private:
> bool isRangeControl() const final;
>- const AtomicString& formControlType() const final;
>+ const AtomString& formControlType() const final;
> double valueAsDouble() const final;
> ExceptionOr<void> setValueAsDecimal(const Decimal&, TextFieldEventBehavior) const final;
> bool typeMismatchFor(const String&) const final;
>diff --git a/Source/WebCore/html/ResetInputType.cpp b/Source/WebCore/html/ResetInputType.cpp
>index 405cb2cc594a3d331146a855dbfa195b3ab70915..f0cdbe7f8ad7a0799b938c354978d2b939d60043 100644
>--- a/Source/WebCore/html/ResetInputType.cpp
>+++ b/Source/WebCore/html/ResetInputType.cpp
>@@ -40,7 +40,7 @@
> 
> namespace WebCore {
> 
>-const AtomicString& ResetInputType::formControlType() const
>+const AtomString& ResetInputType::formControlType() const
> {
> return InputTypeNames::reset();
> }
>diff --git a/Source/WebCore/html/ResetInputType.h b/Source/WebCore/html/ResetInputType.h
>index 2ad6029be846f2460c18bae58d5e19e8a0103040..97ab12a8b9f50350d74937d2273c786ba358dd22 100644
>--- a/Source/WebCore/html/ResetInputType.h
>+++ b/Source/WebCore/html/ResetInputType.h
>@@ -39,7 +39,7 @@ public:
> explicit ResetInputType(HTMLInputElement& element) : BaseButtonInputType(element) { }
> 
> private:
>- const AtomicString& formControlType() const override;
>+ const AtomString& formControlType() const override;
> bool supportsValidation() const override;
> void handleDOMActivateEvent(Event&) override;
> String defaultValue() const override;
>diff --git a/Source/WebCore/html/SearchInputType.cpp b/Source/WebCore/html/SearchInputType.cpp
>index 5343beda8f92640dac36d2ddaf7df0f1fce69737..2c306a203cc4d5874d14f7b3069efb2b8a2d26ac 100644
>--- a/Source/WebCore/html/SearchInputType.cpp
>+++ b/Source/WebCore/html/SearchInputType.cpp
>@@ -65,11 +65,11 @@ void SearchInputType::addSearchResult()
> static void updateResultButtonPseudoType(SearchFieldResultsButtonElement& resultButton, int maxResults)
> {
> if (!maxResults)
>- resultButton.setPseudo(AtomicString("-webkit-search-results-decoration", AtomicString::ConstructFromLiteral));
>+ resultButton.setPseudo(AtomString("-webkit-search-results-decoration", AtomString::ConstructFromLiteral));
> else if (maxResults < 0)
>- resultButton.setPseudo(AtomicString("-webkit-search-decoration", AtomicString::ConstructFromLiteral));
>+ resultButton.setPseudo(AtomString("-webkit-search-decoration", AtomString::ConstructFromLiteral));
> else
>- resultButton.setPseudo(AtomicString("-webkit-search-results-button", AtomicString::ConstructFromLiteral));
>+ resultButton.setPseudo(AtomString("-webkit-search-results-button", AtomString::ConstructFromLiteral));
> }
> 
> void SearchInputType::attributeChanged(const QualifiedName& name)
>@@ -89,7 +89,7 @@ RenderPtr<RenderElement> SearchInputType::createInputRenderer(RenderStyle&& styl
> return createRenderer<RenderSearchField>(*element(), WTFMove(style));
> }
> 
>-const AtomicString& SearchInputType::formControlType() const
>+const AtomString& SearchInputType::formControlType() const
> {
> return InputTypeNames::search();
> }
>diff --git a/Source/WebCore/html/SearchInputType.h b/Source/WebCore/html/SearchInputType.h
>index 28d6a8b6483541c9fe74658e1944ed58cf745a50..6f360a3b88c5ec8df117581aecaa4e411a2e2fc9 100644
>--- a/Source/WebCore/html/SearchInputType.h
>+++ b/Source/WebCore/html/SearchInputType.h
>@@ -48,7 +48,7 @@ private:
> void addSearchResult() final;
> void attributeChanged(const QualifiedName&) final;
> RenderPtr<RenderElement> createInputRenderer(RenderStyle&&) final;
>- const AtomicString& formControlType() const final;
>+ const AtomString& formControlType() const final;
> bool isSearchField() const final;
> bool needsContainer() const final;
> void createShadowSubtree() final;
>diff --git a/Source/WebCore/html/SubmitInputType.cpp b/Source/WebCore/html/SubmitInputType.cpp
>index 1b1ea080e3807ac6542c5ca2491845cc0c753c9c..985af6672dca836f2261a0a3d736c629adb8453b 100644
>--- a/Source/WebCore/html/SubmitInputType.cpp
>+++ b/Source/WebCore/html/SubmitInputType.cpp
>@@ -41,7 +41,7 @@
> 
> namespace WebCore {
> 
>-const AtomicString& SubmitInputType::formControlType() const
>+const AtomString& SubmitInputType::formControlType() const
> {
> return InputTypeNames::submit();
> }
>diff --git a/Source/WebCore/html/SubmitInputType.h b/Source/WebCore/html/SubmitInputType.h
>index 02dcee09dd32e7a56b1bd5d4cc07c01b97ecf4c4..e1ede279e4756be833c3e57d77478b712875b149 100644
>--- a/Source/WebCore/html/SubmitInputType.h
>+++ b/Source/WebCore/html/SubmitInputType.h
>@@ -39,7 +39,7 @@ public:
> explicit SubmitInputType(HTMLInputElement& element) : BaseButtonInputType(element) { }
> 
> private:
>- const AtomicString& formControlType() const override;
>+ const AtomString& formControlType() const override;
> bool appendFormData(DOMFormData&, bool) const override;
> bool supportsRequired() const override;
> void handleDOMActivateEvent(Event&) override;
>diff --git a/Source/WebCore/html/TelephoneInputType.cpp b/Source/WebCore/html/TelephoneInputType.cpp
>index c6fb41152eb415120cb64bd59c171c16fda971dd..828d30fb9e78d06029e3a794fa7b0d7332b78f05 100644
>--- a/Source/WebCore/html/TelephoneInputType.cpp
>+++ b/Source/WebCore/html/TelephoneInputType.cpp
>@@ -36,7 +36,7 @@
> 
> namespace WebCore {
> 
>-const AtomicString& TelephoneInputType::formControlType() const
>+const AtomString& TelephoneInputType::formControlType() const
> {
> return InputTypeNames::telephone();
> }
>diff --git a/Source/WebCore/html/TelephoneInputType.h b/Source/WebCore/html/TelephoneInputType.h
>index 1f8d5ea58febb26b671bad6fdb8771e42c785a1b..9106e58c9407380b9ebaad9b077bd457aa69612c 100644
>--- a/Source/WebCore/html/TelephoneInputType.h
>+++ b/Source/WebCore/html/TelephoneInputType.h
>@@ -39,7 +39,7 @@ public:
> explicit TelephoneInputType(HTMLInputElement& element) : BaseTextInputType(element) { }
> 
> private:
>- const AtomicString& formControlType() const override;
>+ const AtomString& formControlType() const override;
> bool isTelephoneField() const override;
> };
> 
>diff --git a/Source/WebCore/html/TextFieldInputType.cpp b/Source/WebCore/html/TextFieldInputType.cpp
>index 3d053f143e5b7fc16dd7493e0b5bbac9fea4b1d7..fdb8e30ffec9bb09ace6b29ec6a301a390eed581 100644
>--- a/Source/WebCore/html/TextFieldInputType.cpp
>+++ b/Source/WebCore/html/TextFieldInputType.cpp
>@@ -349,7 +349,7 @@ void TextFieldInputType::createShadowSubtree()
> 
> if (shouldHaveCapsLockIndicator) {
> m_capsLockIndicator = HTMLDivElement::create(document);
>- m_capsLockIndicator->setPseudo(AtomicString("-webkit-caps-lock-indicator", AtomicString::ConstructFromLiteral));
>+ m_capsLockIndicator->setPseudo(AtomString("-webkit-caps-lock-indicator", AtomString::ConstructFromLiteral));
> 
> bool shouldDrawCapsLockIndicator = this->shouldDrawCapsLockIndicator();
> m_capsLockIndicator->setInlineStyleProperty(CSSPropertyDisplay, shouldDrawCapsLockIndicator ? CSSValueBlock : CSSValueNone, true);
>@@ -457,7 +457,7 @@ void TextFieldInputType::createDataListDropdownIndicator()
> ScriptDisallowedScope::EventAllowedScope allowedScope(*m_container);
> m_dataListDropdownIndicator = DataListButtonElement::create(element()->document(), *this);
> m_container->appendChild(*m_dataListDropdownIndicator);
>- m_dataListDropdownIndicator->setPseudo(AtomicString("-webkit-list-button", AtomicString::ConstructFromLiteral));
>+ m_dataListDropdownIndicator->setPseudo(AtomString("-webkit-list-button", AtomString::ConstructFromLiteral));
> m_dataListDropdownIndicator->setInlineStyleProperty(CSSPropertyDisplay, CSSValueNone, true);
> 
> }
>@@ -518,17 +518,17 @@ static String autoFillButtonTypeToAutoFillButtonText(AutoFillButtonType autoFill
> return { };
> }
> 
>-static AtomicString autoFillButtonTypeToAutoFillButtonPseudoClassName(AutoFillButtonType autoFillButtonType)
>+static AtomString autoFillButtonTypeToAutoFillButtonPseudoClassName(AutoFillButtonType autoFillButtonType)
> {
> switch (autoFillButtonType) {
> case AutoFillButtonType::Contacts:
>- return { "-webkit-contacts-auto-fill-button", AtomicString::ConstructFromLiteral };
>+ return { "-webkit-contacts-auto-fill-button", AtomString::ConstructFromLiteral };
> case AutoFillButtonType::Credentials:
>- return { "-webkit-credentials-auto-fill-button", AtomicString::ConstructFromLiteral };
>+ return { "-webkit-credentials-auto-fill-button", AtomString::ConstructFromLiteral };
> case AutoFillButtonType::StrongPassword:
>- return { "-webkit-strong-password-auto-fill-button", AtomicString::ConstructFromLiteral };
>+ return { "-webkit-strong-password-auto-fill-button", AtomString::ConstructFromLiteral };
> case AutoFillButtonType::CreditCard:
>- return { "-webkit-credit-card-auto-fill-button", AtomicString::ConstructFromLiteral };
>+ return { "-webkit-credit-card-auto-fill-button", AtomString::ConstructFromLiteral };
> case AutoFillButtonType::None:
> ASSERT_NOT_REACHED();
> return emptyAtom();
>@@ -537,7 +537,7 @@ static AtomicString autoFillButtonTypeToAutoFillButtonPseudoClassName(AutoFillBu
> return { };
> }
> 
>-static bool isAutoFillButtonTypeChanged(const AtomicString& attribute, AutoFillButtonType autoFillButtonType)
>+static bool isAutoFillButtonTypeChanged(const AtomString& attribute, AutoFillButtonType autoFillButtonType)
> {
> if (attribute == "-webkit-contacts-auto-fill-button" && autoFillButtonType != AutoFillButtonType::Contacts)
> return true;
>@@ -782,7 +782,7 @@ void TextFieldInputType::createContainer()
> 
> m_container = TextControlInnerContainer::create(element()->document());
> element()->userAgentShadowRoot()->appendChild(*m_container);
>- m_container->setPseudo(AtomicString("-webkit-textfield-decoration-container", AtomicString::ConstructFromLiteral));
>+ m_container->setPseudo(AtomString("-webkit-textfield-decoration-container", AtomString::ConstructFromLiteral));
> 
> m_innerBlock = TextControlInnerElement::create(element()->document());
> m_container->appendChild(*m_innerBlock);
>@@ -799,7 +799,7 @@ void TextFieldInputType::createAutoFillButton(AutoFillButtonType autoFillButtonT
> ASSERT(element());
> m_autoFillButton = AutoFillButtonElement::create(element()->document(), *this);
> m_autoFillButton->setPseudo(autoFillButtonTypeToAutoFillButtonPseudoClassName(autoFillButtonType));
>- m_autoFillButton->setAttributeWithoutSynchronization(roleAttr, AtomicString("button", AtomicString::ConstructFromLiteral));
>+ m_autoFillButton->setAttributeWithoutSynchronization(roleAttr, AtomString("button", AtomString::ConstructFromLiteral));
> m_autoFillButton->setAttributeWithoutSynchronization(aria_labelAttr, autoFillButtonTypeToAccessibilityLabel(autoFillButtonType));
> m_autoFillButton->setTextContent(autoFillButtonTypeToAutoFillButtonText(autoFillButtonType));
> m_container->appendChild(*m_autoFillButton);
>@@ -818,7 +818,7 @@ void TextFieldInputType::updateAutoFillButton()
> if (!m_autoFillButton)
> createAutoFillButton(autoFillButtonType);
> 
>- const AtomicString& attribute = m_autoFillButton->attributeWithoutSynchronization(pseudoAttr);
>+ const AtomString& attribute = m_autoFillButton->attributeWithoutSynchronization(pseudoAttr);
> bool shouldUpdateAutoFillButtonType = isAutoFillButtonTypeChanged(attribute, autoFillButtonType);
> if (shouldUpdateAutoFillButtonType) {
> m_autoFillButton->setPseudo(autoFillButtonTypeToAutoFillButtonPseudoClassName(autoFillButtonType));
>diff --git a/Source/WebCore/html/TextInputType.cpp b/Source/WebCore/html/TextInputType.cpp
>index 9032db6757f5cf2e137a940c96dc0e0121ea4920..784b65e0cd9d15f71f3ecabcce44aca5f263fd24 100644
>--- a/Source/WebCore/html/TextInputType.cpp
>+++ b/Source/WebCore/html/TextInputType.cpp
>@@ -38,7 +38,7 @@ namespace WebCore {
> 
> using namespace HTMLNames;
> 
>-const AtomicString& TextInputType::formControlType() const
>+const AtomString& TextInputType::formControlType() const
> {
> return InputTypeNames::text();
> }
>diff --git a/Source/WebCore/html/TextInputType.h b/Source/WebCore/html/TextInputType.h
>index 6d7f39db85d1578baf3f14018151b0f8cb2b7dc4..ee89c8f6aa9f18acc79f5c2b1a85a027bee7d3ce 100644
>--- a/Source/WebCore/html/TextInputType.h
>+++ b/Source/WebCore/html/TextInputType.h
>@@ -39,7 +39,7 @@ public:
> explicit TextInputType(HTMLInputElement& element) : BaseTextInputType(element) { }
> 
> private:
>- const AtomicString& formControlType() const override;
>+ const AtomString& formControlType() const override;
> };
> 
> } // namespace WebCore
>diff --git a/Source/WebCore/html/TimeInputType.cpp b/Source/WebCore/html/TimeInputType.cpp
>index 42c3911ede22bf127f9c2c9adaeed1de369e2577..b4040d34f0c18e8c460f1bf5c71bbb836bc312de 100644
>--- a/Source/WebCore/html/TimeInputType.cpp
>+++ b/Source/WebCore/html/TimeInputType.cpp
>@@ -52,7 +52,7 @@ TimeInputType::TimeInputType(HTMLInputElement& element)
> {
> }
> 
>-const AtomicString& TimeInputType::formControlType() const
>+const AtomString& TimeInputType::formControlType() const
> {
> return InputTypeNames::time();
> }
>diff --git a/Source/WebCore/html/TimeInputType.h b/Source/WebCore/html/TimeInputType.h
>index 06486bca28b462e560a0875afd7e9863f11aa833..e985508edb99d574b58245b3c1a40dad7b6cc6db 100644
>--- a/Source/WebCore/html/TimeInputType.h
>+++ b/Source/WebCore/html/TimeInputType.h
>@@ -41,7 +41,7 @@ public:
> explicit TimeInputType(HTMLInputElement&);
> 
> private:
>- const AtomicString& formControlType() const override;
>+ const AtomString& formControlType() const override;
> DateComponents::Type dateType() const override;
> Decimal defaultValueForStepUp() const override;
> StepRange createStepRange(AnyStepHandling) const override;
>diff --git a/Source/WebCore/html/URLInputType.cpp b/Source/WebCore/html/URLInputType.cpp
>index 63bb3cc2601a043d149c45a29ec18da140b5ad84..76818a26098e75cc88fef79f851a08bbc9ca9e6d 100644
>--- a/Source/WebCore/html/URLInputType.cpp
>+++ b/Source/WebCore/html/URLInputType.cpp
>@@ -40,7 +40,7 @@
> 
> namespace WebCore {
> 
>-const AtomicString& URLInputType::formControlType() const
>+const AtomString& URLInputType::formControlType() const
> {
> return InputTypeNames::url();
> }
>diff --git a/Source/WebCore/html/URLInputType.h b/Source/WebCore/html/URLInputType.h
>index 98b9f85a172ea925d6bf6c264e4773feb8f8833e..0d3bbb5a2d05855c8f125bc9faef8eb17f7990b2 100644
>--- a/Source/WebCore/html/URLInputType.h
>+++ b/Source/WebCore/html/URLInputType.h
>@@ -39,7 +39,7 @@ public:
> explicit URLInputType(HTMLInputElement& element) : BaseTextInputType(element) { }
> 
> private:
>- const AtomicString& formControlType() const override;
>+ const AtomString& formControlType() const override;
> bool typeMismatchFor(const String&) const override;
> bool typeMismatch() const override;
> String typeMismatchText() const override;
>diff --git a/Source/WebCore/html/URLUtils.h b/Source/WebCore/html/URLUtils.h
>index 696c0051bd544723bb48e5f87e1d8703a829027d..3c5f2d26135b97e8a72b6a0cd632a72f6c6bfb0d 100644
>--- a/Source/WebCore/html/URLUtils.h
>+++ b/Source/WebCore/html/URLUtils.h
>@@ -297,7 +297,7 @@ String URLUtils<T>::hash() const
> String fragmentIdentifier = href().fragmentIdentifier();
> if (fragmentIdentifier.isEmpty())
> return emptyString();
>- return AtomicString(String("#" + fragmentIdentifier));
>+ return AtomString(String("#" + fragmentIdentifier));
> }
> 
> template <typename T>
>diff --git a/Source/WebCore/html/ValidationMessage.cpp b/Source/WebCore/html/ValidationMessage.cpp
>index dae9f126135f694c3ead1bd34641212773fdc31e..8af73a8a0054980ad17906956a8432a6f9cdb14b 100644
>--- a/Source/WebCore/html/ValidationMessage.cpp
>+++ b/Source/WebCore/html/ValidationMessage.cpp
>@@ -90,7 +90,7 @@ void ValidationMessage::updateValidationMessage(const String& message)
> // with the validationMessage. However, this behavior is same as Opera
> // and the specification describes such behavior as an example.
> if (!updatedMessage.isEmpty()) {
>- const AtomicString& title = m_element->attributeWithoutSynchronization(titleAttr);
>+ const AtomString& title = m_element->attributeWithoutSynchronization(titleAttr);
> if (!title.isEmpty())
> updatedMessage = updatedMessage + '\n' + title;
> }
>@@ -183,7 +183,7 @@ void ValidationMessage::buildBubbleTree()
> 
> Document& document = m_element->document();
> m_bubble = HTMLDivElement::create(document);
>- m_bubble->setPseudo(AtomicString("-webkit-validation-bubble", AtomicString::ConstructFromLiteral));
>+ m_bubble->setPseudo(AtomString("-webkit-validation-bubble", AtomString::ConstructFromLiteral));
> // Need to force position:absolute because RenderMenuList doesn't assume it
> // contains non-absolute or non-fixed renderers as children.
> m_bubble->setInlineStyleProperty(CSSPropertyPosition, CSSValueAbsolute);
>@@ -199,24 +199,24 @@ void ValidationMessage::buildBubbleTree()
> adjustBubblePosition(m_element->renderer()->absoluteBoundingBoxRect(), m_bubble.get());
> 
> auto clipper = HTMLDivElement::create(document);
>- clipper->setPseudo(AtomicString("-webkit-validation-bubble-arrow-clipper", AtomicString::ConstructFromLiteral));
>+ clipper->setPseudo(AtomString("-webkit-validation-bubble-arrow-clipper", AtomString::ConstructFromLiteral));
> auto bubbleArrow = HTMLDivElement::create(document);
>- bubbleArrow->setPseudo(AtomicString("-webkit-validation-bubble-arrow", AtomicString::ConstructFromLiteral));
>+ bubbleArrow->setPseudo(AtomString("-webkit-validation-bubble-arrow", AtomString::ConstructFromLiteral));
> clipper->appendChild(bubbleArrow);
> m_bubble->appendChild(clipper);
> 
> auto message = HTMLDivElement::create(document);
>- message->setPseudo(AtomicString("-webkit-validation-bubble-message", AtomicString::ConstructFromLiteral));
>+ message->setPseudo(AtomString("-webkit-validation-bubble-message", AtomString::ConstructFromLiteral));
> auto icon = HTMLDivElement::create(document);
>- icon->setPseudo(AtomicString("-webkit-validation-bubble-icon", AtomicString::ConstructFromLiteral));
>+ icon->setPseudo(AtomString("-webkit-validation-bubble-icon", AtomString::ConstructFromLiteral));
> message->appendChild(icon);
> auto textBlock = HTMLDivElement::create(document);
>- textBlock->setPseudo(AtomicString("-webkit-validation-bubble-text-block", AtomicString::ConstructFromLiteral));
>+ textBlock->setPseudo(AtomString("-webkit-validation-bubble-text-block", AtomString::ConstructFromLiteral));
> m_messageHeading = HTMLDivElement::create(document);
>- m_messageHeading->setPseudo(AtomicString("-webkit-validation-bubble-heading", AtomicString::ConstructFromLiteral));
>+ m_messageHeading->setPseudo(AtomString("-webkit-validation-bubble-heading", AtomString::ConstructFromLiteral));
> textBlock->appendChild(*m_messageHeading);
> m_messageBody = HTMLDivElement::create(document);
>- m_messageBody->setPseudo(AtomicString("-webkit-validation-bubble-body", AtomicString::ConstructFromLiteral));
>+ m_messageBody->setPseudo(AtomString("-webkit-validation-bubble-body", AtomString::ConstructFromLiteral));
> textBlock->appendChild(*m_messageBody);
> message->appendChild(textBlock);
> m_bubble->appendChild(message);
>diff --git a/Source/WebCore/html/WeekInputType.cpp b/Source/WebCore/html/WeekInputType.cpp
>index bcb6af2caad5e5f3bea9454a5103eb951cd43d62..198cfcce68edd7a97884a11944d11bcdbd8d08a1 100644
>--- a/Source/WebCore/html/WeekInputType.cpp
>+++ b/Source/WebCore/html/WeekInputType.cpp
>@@ -45,7 +45,7 @@ static const int weekDefaultStep = 1;
> static const int weekStepScaleFactor = 604800000;
> static const StepRange::StepDescription weekStepDescription { weekDefaultStep, weekDefaultStepBase, weekStepScaleFactor, StepRange::ParsedStepValueShouldBeInteger };
> 
>-const AtomicString& WeekInputType::formControlType() const
>+const AtomString& WeekInputType::formControlType() const
> {
> return InputTypeNames::week();
> }
>diff --git a/Source/WebCore/html/WeekInputType.h b/Source/WebCore/html/WeekInputType.h
>index ce3b1e6b291764ff976b1ffb90a52be5bc5da2a7..37190dfe79ea55081014c2e98a5283052b6dfba7 100644
>--- a/Source/WebCore/html/WeekInputType.h
>+++ b/Source/WebCore/html/WeekInputType.h
>@@ -41,7 +41,7 @@ public:
> explicit WeekInputType(HTMLInputElement& element) : BaseChooserOnlyDateAndTimeInputType(element) { }
> 
> private:
>- const AtomicString& formControlType() const override;
>+ const AtomString& formControlType() const override;
> DateComponents::Type dateType() const override;
> StepRange createStepRange(AnyStepHandling) const override;
> bool parseToDateComponentsInternal(const UChar*, unsigned length, DateComponents*) const override;
>diff --git a/Source/WebCore/html/canvas/WebGLContextEvent.cpp b/Source/WebCore/html/canvas/WebGLContextEvent.cpp
>index 41a6ea6ac6b7db88b6c87186259fc43883b6c9f2..13df204627291feb574e407ea41383ebc7dd8176 100644
>--- a/Source/WebCore/html/canvas/WebGLContextEvent.cpp
>+++ b/Source/WebCore/html/canvas/WebGLContextEvent.cpp
>@@ -30,13 +30,13 @@
> 
> namespace WebCore {
> 
>-WebGLContextEvent::WebGLContextEvent(const AtomicString& type, CanBubble canBubble, IsCancelable cancelable, const String& statusMessage)
>+WebGLContextEvent::WebGLContextEvent(const AtomString& type, CanBubble canBubble, IsCancelable cancelable, const String& statusMessage)
> : Event(type, canBubble, cancelable)
> , m_statusMessage(statusMessage)
> {
> }
> 
>-WebGLContextEvent::WebGLContextEvent(const AtomicString& type, const Init& initializer, IsTrusted isTrusted)
>+WebGLContextEvent::WebGLContextEvent(const AtomString& type, const Init& initializer, IsTrusted isTrusted)
> : Event(type, initializer, isTrusted)
> , m_statusMessage(initializer.statusMessage)
> {
>diff --git a/Source/WebCore/html/canvas/WebGLContextEvent.h b/Source/WebCore/html/canvas/WebGLContextEvent.h
>index 99aad7efcb419d60cd71724f80cfe3a354b55383..5bfd0295901a3307924d649289e4a2c3b7bfa576 100644
>--- a/Source/WebCore/html/canvas/WebGLContextEvent.h
>+++ b/Source/WebCore/html/canvas/WebGLContextEvent.h
>@@ -31,7 +31,7 @@ namespace WebCore {
> 
> class WebGLContextEvent final : public Event {
> public:
>- static Ref<WebGLContextEvent> create(const AtomicString& type, CanBubble canBubble, IsCancelable cancelable, const String& statusMessage)
>+ static Ref<WebGLContextEvent> create(const AtomString& type, CanBubble canBubble, IsCancelable cancelable, const String& statusMessage)
> {
> return adoptRef(*new WebGLContextEvent(type, canBubble, cancelable, statusMessage));
> }
>@@ -40,7 +40,7 @@ public:
> String statusMessage;
> };
> 
>- static Ref<WebGLContextEvent> create(const AtomicString& type, const Init& initializer, IsTrusted isTrusted = IsTrusted::No)
>+ static Ref<WebGLContextEvent> create(const AtomString& type, const Init& initializer, IsTrusted isTrusted = IsTrusted::No)
> {
> return adoptRef(*new WebGLContextEvent(type, initializer, isTrusted));
> }
>@@ -51,8 +51,8 @@ public:
> EventInterface eventInterface() const override;
> 
> private:
>- WebGLContextEvent(const AtomicString& type, CanBubble, IsCancelable, const String& statusMessage);
>- WebGLContextEvent(const AtomicString&, const Init&, IsTrusted);
>+ WebGLContextEvent(const AtomString& type, CanBubble, IsCancelable, const String& statusMessage);
>+ WebGLContextEvent(const AtomString&, const Init&, IsTrusted);
> 
> String m_statusMessage;
> };
>diff --git a/Source/WebCore/html/parser/AtomicHTMLToken.h b/Source/WebCore/html/parser/AtomicHTMLToken.h
>index a070ce47f3bfbd97e59f34fd34544aae898c6abb..b95976f21e66efcca0ce1c474284568b5bc42a62 100644
>--- a/Source/WebCore/html/parser/AtomicHTMLToken.h
>+++ b/Source/WebCore/html/parser/AtomicHTMLToken.h
>@@ -33,7 +33,7 @@ namespace WebCore {
> class AtomicHTMLToken {
> public:
> explicit AtomicHTMLToken(HTMLToken&);
>- AtomicHTMLToken(HTMLToken::Type, const AtomicString& name, Vector<Attribute>&& = { }); // Only StartTag or EndTag.
>+ AtomicHTMLToken(HTMLToken::Type, const AtomString& name, Vector<Attribute>&& = { }); // Only StartTag or EndTag.
> 
> AtomicHTMLToken(const AtomicHTMLToken&) = delete;
> AtomicHTMLToken(AtomicHTMLToken&&) = default;
>@@ -42,9 +42,9 @@ public:
> 
> // StartTag, EndTag, DOCTYPE.
> 
>- void setName(const AtomicString&);
>+ void setName(const AtomString&);
> 
>- const AtomicString& name() const;
>+ const AtomString& name() const;
> 
> // DOCTYPE.
> 
>@@ -74,7 +74,7 @@ private:
> 
> void initializeAttributes(const HTMLToken::AttributeList& attributes);
> 
>- AtomicString m_name; // StartTag, EndTag, DOCTYPE.
>+ AtomString m_name; // StartTag, EndTag, DOCTYPE.
> 
> String m_data; // Comment
> 
>@@ -92,20 +92,20 @@ private:
> };
> 
> const Attribute* findAttribute(const Vector<Attribute>&, const QualifiedName&);
>-bool hasAttribute(const Vector<Attribute>&, const AtomicString& localName);
>+bool hasAttribute(const Vector<Attribute>&, const AtomString& localName);
> 
> inline HTMLToken::Type AtomicHTMLToken::type() const
> {
> return m_type;
> }
> 
>-inline const AtomicString& AtomicHTMLToken::name() const
>+inline const AtomString& AtomicHTMLToken::name() const
> {
> ASSERT(m_type == HTMLToken::StartTag || m_type == HTMLToken::EndTag || m_type == HTMLToken::DOCTYPE);
> return m_name;
> }
> 
>-inline void AtomicHTMLToken::setName(const AtomicString& name)
>+inline void AtomicHTMLToken::setName(const AtomString& name)
> {
> ASSERT(m_type == HTMLToken::StartTag || m_type == HTMLToken::EndTag || m_type == HTMLToken::DOCTYPE);
> m_name = name;
>@@ -182,7 +182,7 @@ inline const Attribute* findAttribute(const Vector<Attribute>& attributes, const
> return nullptr;
> }
> 
>-inline bool hasAttribute(const Vector<Attribute>& attributes, const AtomicString& localName)
>+inline bool hasAttribute(const Vector<Attribute>& attributes, const AtomString& localName)
> {
> for (auto& attribute : attributes) {
> if (attribute.localName() == localName)
>@@ -202,11 +202,11 @@ inline void AtomicHTMLToken::initializeAttributes(const HTMLToken::AttributeList
> if (attribute.name.isEmpty())
> continue;
> 
>- AtomicString localName(attribute.name);
>+ AtomString localName(attribute.name);
> 
> // FIXME: This is N^2 for the number of attributes.
> if (!hasAttribute(m_attributes, localName))
>- m_attributes.uncheckedAppend(Attribute(QualifiedName(nullAtom(), localName, nullAtom()), AtomicString(attribute.value)));
>+ m_attributes.uncheckedAppend(Attribute(QualifiedName(nullAtom(), localName, nullAtom()), AtomString(attribute.value)));
> }
> }
> 
>@@ -218,7 +218,7 @@ inline AtomicHTMLToken::AtomicHTMLToken(HTMLToken& token)
> ASSERT_NOT_REACHED();
> return;
> case HTMLToken::DOCTYPE:
>- m_name = AtomicString(token.name());
>+ m_name = AtomString(token.name());
> m_doctypeData = token.releaseDoctypeData();
> return;
> case HTMLToken::EndOfFile:
>@@ -226,7 +226,7 @@ inline AtomicHTMLToken::AtomicHTMLToken(HTMLToken& token)
> case HTMLToken::StartTag:
> case HTMLToken::EndTag:
> m_selfClosing = token.selfClosing();
>- m_name = AtomicString(token.name());
>+ m_name = AtomString(token.name());
> initializeAttributes(token.attributes());
> return;
> case HTMLToken::Comment:
>@@ -244,7 +244,7 @@ inline AtomicHTMLToken::AtomicHTMLToken(HTMLToken& token)
> ASSERT_NOT_REACHED();
> }
> 
>-inline AtomicHTMLToken::AtomicHTMLToken(HTMLToken::Type type, const AtomicString& name, Vector<Attribute>&& attributes)
>+inline AtomicHTMLToken::AtomicHTMLToken(HTMLToken::Type type, const AtomString& name, Vector<Attribute>&& attributes)
> : m_type(type)
> , m_name(name)
> , m_selfClosing(false)
>diff --git a/Source/WebCore/html/parser/HTMLConstructionSite.cpp b/Source/WebCore/html/parser/HTMLConstructionSite.cpp
>index cf1b53bdb23f798fb2138b96895048919bc4217c..51bae4c21cf940dcd8c6d320bc4dbd6626be7d9f 100644
>--- a/Source/WebCore/html/parser/HTMLConstructionSite.cpp
>+++ b/Source/WebCore/html/parser/HTMLConstructionSite.cpp
>@@ -509,7 +509,7 @@ std::unique_ptr<CustomElementConstructionData> HTMLConstructionSite::insertHTMLE
> return nullptr;
> }
> 
>-void HTMLConstructionSite::insertCustomElement(Ref<Element>&& element, const AtomicString& localName, Vector<Attribute>&& attributes)
>+void HTMLConstructionSite::insertCustomElement(Ref<Element>&& element, const AtomString& localName, Vector<Attribute>&& attributes)
> {
> setAttributes(element, attributes, m_parserContentPolicy);
> attachLater(currentNode(), element.copyRef());
>@@ -554,7 +554,7 @@ void HTMLConstructionSite::insertScriptElement(AtomicHTMLToken&& token)
> m_openElements.push(HTMLStackItem::create(WTFMove(element), WTFMove(token)));
> }
> 
>-void HTMLConstructionSite::insertForeignElement(AtomicHTMLToken&& token, const AtomicString& namespaceURI)
>+void HTMLConstructionSite::insertForeignElement(AtomicHTMLToken&& token, const AtomString& namespaceURI)
> {
> ASSERT(token.type() == HTMLToken::StartTag);
> notImplemented(); // parseError when xmlns or xmlns:xlink are wrong.
>@@ -575,8 +575,8 @@ void HTMLConstructionSite::insertTextNode(const String& characters, WhitespaceMo
> findFosterSite(task);
> 
> // Strings composed entirely of whitespace are likely to be repeated.
>- // Turn them into AtomicString so we share a single string for each.
>- bool shouldUseAtomicString = whitespaceMode == AllWhitespace || (whitespaceMode == WhitespaceUnknown && isAllWhitespace(characters));
>+ // Turn them into AtomString so we share a single string for each.
>+ bool shouldUseAtomString = whitespaceMode == AllWhitespace || (whitespaceMode == WhitespaceUnknown && isAllWhitespace(characters));
> 
> unsigned currentPosition = 0;
> unsigned lengthLimit = shouldUseLengthLimit(*task.parent) ? Text::defaultLengthLimit : std::numeric_limits<unsigned>::max();
>@@ -592,11 +592,11 @@ void HTMLConstructionSite::insertTextNode(const String& characters, WhitespaceMo
> }
> 
> while (currentPosition < characters.length()) {
>- auto textNode = Text::createWithLengthLimit(task.parent->document(), shouldUseAtomicString ? AtomicString(characters).string() : characters, currentPosition, lengthLimit);
>+ auto textNode = Text::createWithLengthLimit(task.parent->document(), shouldUseAtomString ? AtomString(characters).string() : characters, currentPosition, lengthLimit);
> // If we have a whole string of unbreakable characters the above could lead to an infinite loop. Exceeding the length limit is the lesser evil.
> if (!textNode->length()) {
> String substring = characters.substring(currentPosition);
>- textNode = Text::create(task.parent->document(), shouldUseAtomicString ? AtomicString(substring).string() : substring);
>+ textNode = Text::create(task.parent->document(), shouldUseAtomString ? AtomString(substring).string() : substring);
> }
> 
> currentPosition += textNode->length();
>@@ -635,7 +635,7 @@ void HTMLConstructionSite::takeAllChildrenAndReparent(HTMLStackItem& newParent,
> m_taskQueue.append(WTFMove(task));
> }
> 
>-Ref<Element> HTMLConstructionSite::createElement(AtomicHTMLToken& token, const AtomicString& namespaceURI)
>+Ref<Element> HTMLConstructionSite::createElement(AtomicHTMLToken& token, const AtomString& namespaceURI)
> {
> QualifiedName tagName(nullAtom(), token.name(), namespaceURI);
> auto element = ownerDocumentForCurrentNode().createElement(tagName, true);
>@@ -650,7 +650,7 @@ inline Document& HTMLConstructionSite::ownerDocumentForCurrentNode()
> return currentNode().document();
> }
> 
>-static inline JSCustomElementInterface* findCustomElementInterface(Document& ownerDocument, const AtomicString& localName)
>+static inline JSCustomElementInterface* findCustomElementInterface(Document& ownerDocument, const AtomString& localName)
> {
> auto* window = ownerDocument.domWindow();
> if (!window)
>@@ -754,7 +754,7 @@ void HTMLConstructionSite::reconstructTheActiveFormattingElements()
> }
> }
> 
>-void HTMLConstructionSite::generateImpliedEndTagsWithExclusion(const AtomicString& tagName)
>+void HTMLConstructionSite::generateImpliedEndTagsWithExclusion(const AtomString& tagName)
> {
> while (hasImpliedEndTag(currentStackItem()) && !currentStackItem().matchesHTMLTag(tagName))
> m_openElements.pop();
>diff --git a/Source/WebCore/html/parser/HTMLConstructionSite.h b/Source/WebCore/html/parser/HTMLConstructionSite.h
>index 3af622ee9ab4896efd3cfe8a225a99e1eb865b55..c08d667f7c812ca3bebbda3e9089681175fad08a 100644
>--- a/Source/WebCore/html/parser/HTMLConstructionSite.h
>+++ b/Source/WebCore/html/parser/HTMLConstructionSite.h
>@@ -104,7 +104,7 @@ public:
> void insertCommentOnHTMLHtmlElement(AtomicHTMLToken&&);
> void insertHTMLElement(AtomicHTMLToken&&);
> std::unique_ptr<CustomElementConstructionData> insertHTMLElementOrFindCustomElementInterface(AtomicHTMLToken&&);
>- void insertCustomElement(Ref<Element>&&, const AtomicString& localName, Vector<Attribute>&&);
>+ void insertCustomElement(Ref<Element>&&, const AtomString& localName, Vector<Attribute>&&);
> void insertSelfClosingHTMLElement(AtomicHTMLToken&&);
> void insertFormattingElement(AtomicHTMLToken&&);
> void insertHTMLHeadElement(AtomicHTMLToken&&);
>@@ -112,7 +112,7 @@ public:
> void insertHTMLFormElement(AtomicHTMLToken&&, bool isDemoted = false);
> void insertScriptElement(AtomicHTMLToken&&);
> void insertTextNode(const String&, WhitespaceMode = WhitespaceUnknown);
>- void insertForeignElement(AtomicHTMLToken&&, const AtomicString& namespaceURI);
>+ void insertForeignElement(AtomicHTMLToken&&, const AtomString& namespaceURI);
> 
> void insertHTMLHtmlStartTagBeforeHTML(AtomicHTMLToken&&);
> void insertHTMLHtmlStartTagInBody(AtomicHTMLToken&&);
>@@ -134,7 +134,7 @@ public:
> void reconstructTheActiveFormattingElements();
> 
> void generateImpliedEndTags();
>- void generateImpliedEndTagsWithExclusion(const AtomicString& tagName);
>+ void generateImpliedEndTagsWithExclusion(const AtomString& tagName);
> 
> bool inQuirksMode() { return m_inQuirksMode; }
> 
>@@ -172,7 +172,7 @@ public:
> SetForScope<bool> m_redirectAttachToFosterParentChange;
> };
> 
>- static bool isFormattingTag(const AtomicString&);
>+ static bool isFormattingTag(const AtomString&);
> 
> private:
> // In the common case, this queue will have only one task because most
>@@ -188,7 +188,7 @@ private:
> 
> RefPtr<Element> createHTMLElementOrFindCustomElementInterface(AtomicHTMLToken&, JSCustomElementInterface**);
> Ref<Element> createHTMLElement(AtomicHTMLToken&);
>- Ref<Element> createElement(AtomicHTMLToken&, const AtomicString& namespaceURI);
>+ Ref<Element> createElement(AtomicHTMLToken&, const AtomString& namespaceURI);
> 
> void mergeAttributesFromTokenIntoElement(AtomicHTMLToken&&, Element&);
> void dispatchDocumentElementAvailableIfNeeded();
>diff --git a/Source/WebCore/html/parser/HTMLElementStack.cpp b/Source/WebCore/html/parser/HTMLElementStack.cpp
>index 9ea63bc552988cae1cdc8feaa826703b07cc3728..30c5b46df103dbdf6f4b7ce409cc3aa16c546012 100644
>--- a/Source/WebCore/html/parser/HTMLElementStack.cpp
>+++ b/Source/WebCore/html/parser/HTMLElementStack.cpp
>@@ -190,7 +190,7 @@ void HTMLElementStack::pop()
> popCommon();
> }
> 
>-void HTMLElementStack::popUntil(const AtomicString& tagName)
>+void HTMLElementStack::popUntil(const AtomString& tagName)
> {
> while (!topStackItem().matchesHTMLTag(tagName)) {
> // pop() will ASSERT if a <body>, <head> or <html> will be popped.
>@@ -198,7 +198,7 @@ void HTMLElementStack::popUntil(const AtomicString& tagName)
> }
> }
> 
>-void HTMLElementStack::popUntilPopped(const AtomicString& tagName)
>+void HTMLElementStack::popUntilPopped(const AtomString& tagName)
> {
> popUntil(tagName);
> pop();
>@@ -392,7 +392,7 @@ auto HTMLElementStack::find(Element& element) const -> ElementRecord*
> return nullptr;
> }
> 
>-auto HTMLElementStack::topmost(const AtomicString& tagName) const -> ElementRecord*
>+auto HTMLElementStack::topmost(const AtomString& tagName) const -> ElementRecord*
> {
> for (auto* record = m_top.get(); record; record = record->next()) {
> if (record->stackItem().matchesHTMLTag(tagName))
>@@ -406,12 +406,12 @@ bool HTMLElementStack::contains(Element& element) const
> return !!find(element);
> }
> 
>-bool HTMLElementStack::contains(const AtomicString& tagName) const
>+bool HTMLElementStack::contains(const AtomString& tagName) const
> {
> return !!topmost(tagName);
> }
> 
>-template <bool isMarker(HTMLStackItem&)> bool inScopeCommon(HTMLElementStack::ElementRecord* top, const AtomicString& targetTag)
>+template <bool isMarker(HTMLStackItem&)> bool inScopeCommon(HTMLElementStack::ElementRecord* top, const AtomString& targetTag)
> {
> for (auto* record = top; record; record = record->next()) {
> auto& item = record->stackItem();
>@@ -450,7 +450,7 @@ bool HTMLElementStack::inScope(Element& targetElement) const
> return false;
> }
> 
>-bool HTMLElementStack::inScope(const AtomicString& targetTag) const
>+bool HTMLElementStack::inScope(const AtomString& targetTag) const
> {
> return inScopeCommon<isScopeMarker>(m_top.get(), targetTag);
> }
>@@ -460,7 +460,7 @@ bool HTMLElementStack::inScope(const QualifiedName& tagName) const
> return inScope(tagName.localName());
> }
> 
>-bool HTMLElementStack::inListItemScope(const AtomicString& targetTag) const
>+bool HTMLElementStack::inListItemScope(const AtomString& targetTag) const
> {
> return inScopeCommon<isListItemScopeMarker>(m_top.get(), targetTag);
> }
>@@ -470,7 +470,7 @@ bool HTMLElementStack::inListItemScope(const QualifiedName& tagName) const
> return inListItemScope(tagName.localName());
> }
> 
>-bool HTMLElementStack::inTableScope(const AtomicString& targetTag) const
>+bool HTMLElementStack::inTableScope(const AtomString& targetTag) const
> {
> return inScopeCommon<isTableScopeMarker>(m_top.get(), targetTag);
> }
>@@ -480,7 +480,7 @@ bool HTMLElementStack::inTableScope(const QualifiedName& tagName) const
> return inTableScope(tagName.localName());
> }
> 
>-bool HTMLElementStack::inButtonScope(const AtomicString& targetTag) const
>+bool HTMLElementStack::inButtonScope(const AtomString& targetTag) const
> {
> return inScopeCommon<isButtonScopeMarker>(m_top.get(), targetTag);
> }
>@@ -490,7 +490,7 @@ bool HTMLElementStack::inButtonScope(const QualifiedName& tagName) const
> return inButtonScope(tagName.localName());
> }
> 
>-bool HTMLElementStack::inSelectScope(const AtomicString& targetTag) const
>+bool HTMLElementStack::inSelectScope(const AtomString& targetTag) const
> {
> return inScopeCommon<isSelectScopeMarker>(m_top.get(), targetTag);
> }
>diff --git a/Source/WebCore/html/parser/HTMLElementStack.h b/Source/WebCore/html/parser/HTMLElementStack.h
>index 6d49927702efd6d699fd1dcd51ca62b69cbb41fe..11876aa1a028a78999eca59d42bfeb98528f353d 100644
>--- a/Source/WebCore/html/parser/HTMLElementStack.h
>+++ b/Source/WebCore/html/parser/HTMLElementStack.h
>@@ -53,7 +53,7 @@ public:
> 
> Element& element() const { return m_item->element(); }
> ContainerNode& node() const { return m_item->node(); }
>- const AtomicString& namespaceURI() const { return m_item->namespaceURI(); }
>+ const AtomString& namespaceURI() const { return m_item->namespaceURI(); }
> HTMLStackItem& stackItem() { return m_item.get(); }
> const HTMLStackItem& stackItem() const { return m_item.get(); }
> 
>@@ -96,7 +96,7 @@ public:
> ElementRecord& topRecord() const;
> ElementRecord* find(Element&) const;
> ElementRecord* furthestBlockForFormattingElement(Element&) const;
>- ElementRecord* topmost(const AtomicString& tagName) const;
>+ ElementRecord* topmost(const AtomString& tagName) const;
> 
> void insertAbove(Ref<HTMLStackItem>&&, ElementRecord&);
> 
>@@ -107,9 +107,9 @@ public:
> void pushHTMLBodyElement(Ref<HTMLStackItem>&&);
> 
> void pop();
>- void popUntil(const AtomicString& tagName);
>+ void popUntil(const AtomString& tagName);
> void popUntil(Element&);
>- void popUntilPopped(const AtomicString& tagName);
>+ void popUntilPopped(const AtomString& tagName);
> void popUntilPopped(const QualifiedName& tagName) { popUntilPopped(tagName.localName()); }
> 
> void popUntilPopped(Element&);
>@@ -129,18 +129,18 @@ public:
> void removeHTMLHeadElement(Element&);
> 
> bool contains(Element&) const;
>- bool contains(const AtomicString& tagName) const;
>+ bool contains(const AtomString& tagName) const;
> 
> bool inScope(Element&) const;
>- bool inScope(const AtomicString& tagName) const;
>+ bool inScope(const AtomString& tagName) const;
> bool inScope(const QualifiedName&) const;
>- bool inListItemScope(const AtomicString& tagName) const;
>+ bool inListItemScope(const AtomString& tagName) const;
> bool inListItemScope(const QualifiedName&) const;
>- bool inTableScope(const AtomicString& tagName) const;
>+ bool inTableScope(const AtomString& tagName) const;
> bool inTableScope(const QualifiedName&) const;
>- bool inButtonScope(const AtomicString& tagName) const;
>+ bool inButtonScope(const AtomString& tagName) const;
> bool inButtonScope(const QualifiedName&) const;
>- bool inSelectScope(const AtomicString& tagName) const;
>+ bool inSelectScope(const AtomString& tagName) const;
> bool inSelectScope(const QualifiedName&) const;
> 
> bool hasNumberedHeaderElementInScope() const;
>diff --git a/Source/WebCore/html/parser/HTMLFormattingElementList.cpp b/Source/WebCore/html/parser/HTMLFormattingElementList.cpp
>index cab16f11d839c99e3a9367b7bc4b935d452f4b7e..6574863896e8f886d7592bee1fa9c9ee96a3ff92 100644
>--- a/Source/WebCore/html/parser/HTMLFormattingElementList.cpp
>+++ b/Source/WebCore/html/parser/HTMLFormattingElementList.cpp
>@@ -41,7 +41,7 @@ HTMLFormattingElementList::HTMLFormattingElementList() = default;
> 
> HTMLFormattingElementList::~HTMLFormattingElementList() = default;
> 
>-Element* HTMLFormattingElementList::closestElementInScopeWithName(const AtomicString& targetName)
>+Element* HTMLFormattingElementList::closestElementInScopeWithName(const AtomString& targetName)
> {
> for (unsigned i = 1; i <= m_entries.size(); ++i) {
> const Entry& entry = m_entries[m_entries.size() - i];
>diff --git a/Source/WebCore/html/parser/HTMLFormattingElementList.h b/Source/WebCore/html/parser/HTMLFormattingElementList.h
>index dfebea343cec058074094fc26bf35e418f2adc9a..e6ab1ea57b14d21d9813df7feda0c656c9d0a7f4 100644
>--- a/Source/WebCore/html/parser/HTMLFormattingElementList.h
>+++ b/Source/WebCore/html/parser/HTMLFormattingElementList.h
>@@ -101,7 +101,7 @@ public:
> bool isEmpty() const { return !size(); }
> size_t size() const { return m_entries.size(); }
> 
>- Element* closestElementInScopeWithName(const AtomicString&);
>+ Element* closestElementInScopeWithName(const AtomString&);
> 
> Entry* find(Element&);
> bool contains(Element&);
>diff --git a/Source/WebCore/html/parser/HTMLMetaCharsetParser.cpp b/Source/WebCore/html/parser/HTMLMetaCharsetParser.cpp
>index b5ca46c21fb6ca25cb9825c795f0887b444520d5..8e0bcb040c11337afc034919830f2d27ea994114 100644
>--- a/Source/WebCore/html/parser/HTMLMetaCharsetParser.cpp
>+++ b/Source/WebCore/html/parser/HTMLMetaCharsetParser.cpp
>@@ -160,7 +160,7 @@ bool HTMLMetaCharsetParser::checkForMetaCharset(const char* data, size_t length)
> while (auto token = m_tokenizer.nextToken(m_input)) {
> bool isEnd = token->type() == HTMLToken::EndTag;
> if (isEnd || token->type() == HTMLToken::StartTag) {
>- AtomicString tagName(token->name());
>+ AtomString tagName(token->name());
> if (!isEnd) {
> m_tokenizer.updateStateFor(tagName);
> if (tagName == metaTag && processMeta(*token)) {
>diff --git a/Source/WebCore/html/parser/HTMLParserIdioms.cpp b/Source/WebCore/html/parser/HTMLParserIdioms.cpp
>index 5442e0c4a067ba727b6295f9b918f3399db2eace..76798467e34046fcdb5e564fb91e7fa3424c42ab 100644
>--- a/Source/WebCore/html/parser/HTMLParserIdioms.cpp
>+++ b/Source/WebCore/html/parser/HTMLParserIdioms.cpp
>@@ -346,7 +346,7 @@ bool threadSafeMatch(const QualifiedName& a, const QualifiedName& b)
> return threadSafeEqual(*a.localName().impl(), *b.localName().impl());
> }
> 
>-String parseCORSSettingsAttribute(const AtomicString& value)
>+String parseCORSSettingsAttribute(const AtomString& value)
> {
> if (value.isNull())
> return String();
>@@ -468,12 +468,12 @@ bool parseMetaHTTPEquivRefresh(const StringView& input, double& delay, String& u
> }
> 
> // https://html.spec.whatwg.org/#rules-for-parsing-a-hash-name-reference
>-AtomicString parseHTMLHashNameReference(StringView usemap)
>+AtomString parseHTMLHashNameReference(StringView usemap)
> {
> size_t numberSignIndex = usemap.find('#');
> if (numberSignIndex == notFound)
> return nullAtom();
>- return usemap.substring(numberSignIndex + 1).toAtomicString();
>+ return usemap.substring(numberSignIndex + 1).toAtomString();
> }
> 
> }
>diff --git a/Source/WebCore/html/parser/HTMLParserIdioms.h b/Source/WebCore/html/parser/HTMLParserIdioms.h
>index 69e894d108c1934a2068a39bd8f95d379b522850..5385c9652617692df662cb81f5fe88191b9ce16a 100644
>--- a/Source/WebCore/html/parser/HTMLParserIdioms.h
>+++ b/Source/WebCore/html/parser/HTMLParserIdioms.h
>@@ -80,11 +80,11 @@ Vector<double> parseHTMLListOfOfFloatingPointNumberValues(StringView);
> bool parseMetaHTTPEquivRefresh(const StringView&, double& delay, String& url);
> 
> // https://html.spec.whatwg.org/multipage/infrastructure.html#cors-settings-attribute
>-String parseCORSSettingsAttribute(const AtomicString&);
>+String parseCORSSettingsAttribute(const AtomString&);
> 
> bool threadSafeMatch(const QualifiedName&, const QualifiedName&);
> 
>-AtomicString parseHTMLHashNameReference(StringView);
>+AtomString parseHTMLHashNameReference(StringView);
> 
> // Inline implementations of some of the functions declared above.
> 
>diff --git a/Source/WebCore/html/parser/HTMLPreloadScanner.cpp b/Source/WebCore/html/parser/HTMLPreloadScanner.cpp
>index d71ec552505745816d55364e3fab6eb1c8e90c0b..3231496bf09a50eed2dab22645f22875b4ffa938 100644
>--- a/Source/WebCore/html/parser/HTMLPreloadScanner.cpp
>+++ b/Source/WebCore/html/parser/HTMLPreloadScanner.cpp
>@@ -51,7 +51,7 @@ using namespace HTMLNames;
> 
> TokenPreloadScanner::TagId TokenPreloadScanner::tagIdFor(const HTMLToken::DataVector& data)
> {
>- AtomicString tagName(data);
>+ AtomString tagName(data);
> if (tagName == imgTag)
> return TagId::Img;
> if (tagName == inputTag)
>@@ -120,7 +120,7 @@ public:
> return;
> 
> for (auto& attribute : attributes) {
>- AtomicString attributeName(attribute.name);
>+ AtomString attributeName(attribute.name);
> String attributeValue = StringImpl::create8BitIfPossible(attribute.value);
> processAttribute(attributeName, attributeValue, document, pictureState);
> }
>@@ -172,14 +172,14 @@ public:
> return request;
> }
> 
>- static bool match(const AtomicString& name, const QualifiedName& qName)
>+ static bool match(const AtomString& name, const QualifiedName& qName)
> {
> ASSERT(isMainThread());
> return qName.localName() == name;
> }
> 
> private:
>- void processImageAndScriptAttribute(const AtomicString& attributeName, const String& attributeValue)
>+ void processImageAndScriptAttribute(const AtomString& attributeName, const String& attributeValue)
> {
> if (match(attributeName, srcAttr))
> setUrlToLoad(attributeValue);
>@@ -189,7 +189,7 @@ private:
> m_charset = attributeValue;
> }
> 
>- void processAttribute(const AtomicString& attributeName, const String& attributeValue, Document& document, const Vector<bool>& pictureState)
>+ void processAttribute(const AtomString& attributeName, const String& attributeValue, Document& document, const Vector<bool>& pictureState)
> {
> bool inPicture = !pictureState.isEmpty();
> bool alreadyMatchedSource = inPicture && pictureState.last();
>@@ -472,7 +472,7 @@ void HTMLPreloadScanner::scan(HTMLResourcePreloader& preloader, Document& docume
> 
> while (auto token = m_tokenizer.nextToken(m_source)) {
> if (token->type() == HTMLToken::StartTag)
>- m_tokenizer.updateStateFor(AtomicString(token->name()));
>+ m_tokenizer.updateStateFor(AtomString(token->name()));
> m_scanner.scan(*token, requests, document);
> }
> 
>diff --git a/Source/WebCore/html/parser/HTMLSrcsetParser.cpp b/Source/WebCore/html/parser/HTMLSrcsetParser.cpp
>index af426cdb41b0d8ff98877c3b8562afe19c8318be..4f4107890686222b59e93926989611bece3d69d3 100644
>--- a/Source/WebCore/html/parser/HTMLSrcsetParser.cpp
>+++ b/Source/WebCore/html/parser/HTMLSrcsetParser.cpp
>@@ -257,7 +257,7 @@ static ImageCandidate pickBestImageCandidate(float deviceScaleFactor, Vector<Ima
> return imageCandidates[winner];
> }
> 
>-ImageCandidate bestFitSourceForImageAttributes(float deviceScaleFactor, const AtomicString& srcAttribute, const AtomicString& srcsetAttribute, float sourceSize)
>+ImageCandidate bestFitSourceForImageAttributes(float deviceScaleFactor, const AtomString& srcAttribute, const AtomString& srcsetAttribute, float sourceSize)
> {
> if (srcsetAttribute.isNull()) {
> if (srcAttribute.isNull())
>diff --git a/Source/WebCore/html/parser/HTMLSrcsetParser.h b/Source/WebCore/html/parser/HTMLSrcsetParser.h
>index 63aee53a3abedf34b69655a7d52da733bce3f0d2..03c57d360bed0fc859d8374c067c41da16b5e9a1 100644
>--- a/Source/WebCore/html/parser/HTMLSrcsetParser.h
>+++ b/Source/WebCore/html/parser/HTMLSrcsetParser.h
>@@ -102,7 +102,7 @@ struct ImageCandidate {
> OriginAttribute originAttribute;
> };
> 
>-ImageCandidate bestFitSourceForImageAttributes(float deviceScaleFactor, const AtomicString& srcAttribute, const AtomicString& srcsetAttribute, float sourceSize);
>+ImageCandidate bestFitSourceForImageAttributes(float deviceScaleFactor, const AtomString& srcAttribute, const AtomString& srcsetAttribute, float sourceSize);
> 
> Vector<ImageCandidate> parseImageCandidatesFromSrcsetAttribute(StringView attribute);
> 
>diff --git a/Source/WebCore/html/parser/HTMLStackItem.h b/Source/WebCore/html/parser/HTMLStackItem.h
>index 985319831b15329bba94fcfa90544e8cf37cfb6e..a3631520a7d31637cab7624547214e81b9f19582 100644
>--- a/Source/WebCore/html/parser/HTMLStackItem.h
>+++ b/Source/WebCore/html/parser/HTMLStackItem.h
>@@ -38,8 +38,8 @@ namespace WebCore {
> class HTMLStackItem : public RefCounted<HTMLStackItem> {
> public:
> // Normal HTMLElementStack and HTMLFormattingElementList items.
>- static Ref<HTMLStackItem> create(Ref<Element>&&, AtomicHTMLToken&&, const AtomicString& namespaceURI = HTMLNames::xhtmlNamespaceURI);
>- static Ref<HTMLStackItem> create(Ref<Element>&&, const AtomicString&, Vector<Attribute>&&);
>+ static Ref<HTMLStackItem> create(Ref<Element>&&, AtomicHTMLToken&&, const AtomString& namespaceURI = HTMLNames::xhtmlNamespaceURI);
>+ static Ref<HTMLStackItem> create(Ref<Element>&&, const AtomString&, Vector<Attribute>&&);
> 
> // Document fragment or element for parsing context.
> static Ref<HTMLStackItem> create(Element&);
>@@ -51,24 +51,24 @@ public:
> ContainerNode& node() const;
> Element& element() const;
> 
>- const AtomicString& namespaceURI() const;
>- const AtomicString& localName() const;
>+ const AtomString& namespaceURI() const;
>+ const AtomString& localName() const;
> 
> const Vector<Attribute>& attributes() const;
> const Attribute* findAttribute(const QualifiedName& attributeName) const;
> 
> bool hasTagName(const QualifiedName&) const;
>- bool matchesHTMLTag(const AtomicString&) const;
>+ bool matchesHTMLTag(const AtomString&) const;
> 
> private:
>- HTMLStackItem(Ref<Element>&&, AtomicHTMLToken&&, const AtomicString& namespaceURI);
>- HTMLStackItem(Ref<Element>&&, const AtomicString& localName, const AtomicString& namespaceURI, Vector<Attribute>&&);
>+ HTMLStackItem(Ref<Element>&&, AtomicHTMLToken&&, const AtomString& namespaceURI);
>+ HTMLStackItem(Ref<Element>&&, const AtomString& localName, const AtomString& namespaceURI, Vector<Attribute>&&);
> explicit HTMLStackItem(Element&);
> explicit HTMLStackItem(DocumentFragment&);
> 
> const Ref<ContainerNode> m_node;
>- const AtomicString m_namespaceURI;
>- const AtomicString m_localName;
>+ const AtomString m_namespaceURI;
>+ const AtomString m_localName;
> const Vector<Attribute> m_attributes;
> };
> 
>@@ -76,7 +76,7 @@ bool isInHTMLNamespace(const HTMLStackItem&);
> bool isNumberedHeaderElement(const HTMLStackItem&);
> bool isSpecialNode(const HTMLStackItem&);
> 
>-inline HTMLStackItem::HTMLStackItem(Ref<Element>&& element, AtomicHTMLToken&& token, const AtomicString& namespaceURI = HTMLNames::xhtmlNamespaceURI)
>+inline HTMLStackItem::HTMLStackItem(Ref<Element>&& element, AtomicHTMLToken&& token, const AtomString& namespaceURI = HTMLNames::xhtmlNamespaceURI)
> : m_node(WTFMove(element))
> , m_namespaceURI(namespaceURI)
> , m_localName(token.name())
>@@ -84,12 +84,12 @@ inline HTMLStackItem::HTMLStackItem(Ref<Element>&& element, AtomicHTMLToken&& to
> {
> }
> 
>-inline Ref<HTMLStackItem> HTMLStackItem::create(Ref<Element>&& element, AtomicHTMLToken&& token, const AtomicString& namespaceURI)
>+inline Ref<HTMLStackItem> HTMLStackItem::create(Ref<Element>&& element, AtomicHTMLToken&& token, const AtomString& namespaceURI)
> {
> return adoptRef(*new HTMLStackItem(WTFMove(element), WTFMove(token), namespaceURI));
> }
> 
>-inline HTMLStackItem::HTMLStackItem(Ref<Element>&& element, const AtomicString& localName, const AtomicString& namespaceURI, Vector<Attribute>&& attributes)
>+inline HTMLStackItem::HTMLStackItem(Ref<Element>&& element, const AtomString& localName, const AtomString& namespaceURI, Vector<Attribute>&& attributes)
> : m_node(WTFMove(element))
> , m_namespaceURI(namespaceURI)
> , m_localName(localName)
>@@ -97,7 +97,7 @@ inline HTMLStackItem::HTMLStackItem(Ref<Element>&& element, const AtomicString&
> {
> }
> 
>-inline Ref<HTMLStackItem> HTMLStackItem::create(Ref<Element>&& element, const AtomicString& localName, Vector<Attribute>&& attributes)
>+inline Ref<HTMLStackItem> HTMLStackItem::create(Ref<Element>&& element, const AtomString& localName, Vector<Attribute>&& attributes)
> {
> auto& namespaceURI = element.get().namespaceURI();
> return adoptRef(*new HTMLStackItem(WTFMove(element), localName, namespaceURI, WTFMove(attributes)));
>@@ -145,12 +145,12 @@ inline bool HTMLStackItem::isElement() const
> return !isDocumentFragment();
> }
> 
>-inline const AtomicString& HTMLStackItem::namespaceURI() const
>+inline const AtomString& HTMLStackItem::namespaceURI() const
> {
> return m_namespaceURI;
> }
> 
>-inline const AtomicString& HTMLStackItem::localName() const
>+inline const AtomString& HTMLStackItem::localName() const
> {
> return m_localName;
> }
>@@ -171,7 +171,7 @@ inline bool HTMLStackItem::hasTagName(const QualifiedName& name) const
> return m_localName == name.localName() && m_namespaceURI == name.namespaceURI();
> }
> 
>-inline bool HTMLStackItem::matchesHTMLTag(const AtomicString& name) const
>+inline bool HTMLStackItem::matchesHTMLTag(const AtomString& name) const
> {
> return m_localName == name && m_namespaceURI == HTMLNames::xhtmlNamespaceURI;
> }
>@@ -200,7 +200,7 @@ inline bool isSpecialNode(const HTMLStackItem& item)
> {
> if (item.isDocumentFragment())
> return true;
>- const AtomicString& tagName = item.localName();
>+ const AtomString& tagName = item.localName();
> if (item.namespaceURI() == HTMLNames::xhtmlNamespaceURI) {
> return tagName == HTMLNames::addressTag
> || tagName == HTMLNames::appletTag
>diff --git a/Source/WebCore/html/parser/HTMLTokenizer.cpp b/Source/WebCore/html/parser/HTMLTokenizer.cpp
>index f537cf1b4d93f03f739316136ce03a16dfc3e0cd..663e0c1c7a95df9dd5b15b288c3f327278e42810 100644
>--- a/Source/WebCore/html/parser/HTMLTokenizer.cpp
>+++ b/Source/WebCore/html/parser/HTMLTokenizer.cpp
>@@ -1405,7 +1405,7 @@ String HTMLTokenizer::bufferedCharacters() const
> return characters.toString();
> }
> 
>-void HTMLTokenizer::updateStateFor(const AtomicString& tagName)
>+void HTMLTokenizer::updateStateFor(const AtomString& tagName)
> {
> if (tagName == textareaTag || tagName == titleTag)
> m_state = RCDATAState;
>diff --git a/Source/WebCore/html/parser/HTMLTokenizer.h b/Source/WebCore/html/parser/HTMLTokenizer.h
>index a553acbd91c6099726565e17ab2fe87ad7be9877..5d8191f44895442158cf7e254a3a1c5687a8044c 100644
>--- a/Source/WebCore/html/parser/HTMLTokenizer.h
>+++ b/Source/WebCore/html/parser/HTMLTokenizer.h
>@@ -62,7 +62,7 @@ public:
> //
> // This approximation is also the algorithm called for when parsing an HTML fragment.
> // https://html.spec.whatwg.org/multipage/syntax.html#parsing-html-fragments
>- void updateStateFor(const AtomicString& tagName);
>+ void updateStateFor(const AtomString& tagName);
> 
> void setForceNullCharacterReplacement(bool);
> 
>diff --git a/Source/WebCore/html/parser/HTMLTreeBuilder.cpp b/Source/WebCore/html/parser/HTMLTreeBuilder.cpp
>index 18fbe4042d4feec6f7fcf32a1372119b531534b8..0fb1fb6b2a6734e61e92621b26c0a6db6b4edada 100644
>--- a/Source/WebCore/html/parser/HTMLTreeBuilder.cpp
>+++ b/Source/WebCore/html/parser/HTMLTreeBuilder.cpp
>@@ -56,7 +56,7 @@ namespace WebCore {
> 
> using namespace HTMLNames;
> 
>-CustomElementConstructionData::CustomElementConstructionData(Ref<JSCustomElementInterface>&& customElementInterface, const AtomicString& name, Vector<Attribute>&& attributes)
>+CustomElementConstructionData::CustomElementConstructionData(Ref<JSCustomElementInterface>&& customElementInterface, const AtomString& name, Vector<Attribute>&& attributes)
> : elementInterface(WTFMove(customElementInterface))
> , name(name)
> , attributes(WTFMove(attributes))
>@@ -89,7 +89,7 @@ static inline bool isAllWhitespaceOrReplacementCharacters(const String& string)
> return string.isAllSpecialCharacters<isHTMLSpaceOrReplacementCharacter>();
> }
> 
>-static bool isNumberedHeaderTag(const AtomicString& tagName)
>+static bool isNumberedHeaderTag(const AtomString& tagName)
> {
> return tagName == h1Tag
> || tagName == h2Tag
>@@ -99,22 +99,22 @@ static bool isNumberedHeaderTag(const AtomicString& tagName)
> || tagName == h6Tag;
> }
> 
>-static bool isCaptionColOrColgroupTag(const AtomicString& tagName)
>+static bool isCaptionColOrColgroupTag(const AtomString& tagName)
> {
> return tagName == captionTag || tagName == colTag || tagName == colgroupTag;
> }
> 
>-static bool isTableCellContextTag(const AtomicString& tagName)
>+static bool isTableCellContextTag(const AtomString& tagName)
> {
> return tagName == thTag || tagName == tdTag;
> }
> 
>-static bool isTableBodyContextTag(const AtomicString& tagName)
>+static bool isTableBodyContextTag(const AtomString& tagName)
> {
> return tagName == tbodyTag || tagName == tfootTag || tagName == theadTag;
> }
> 
>-static bool isNonAnchorNonNobrFormattingTag(const AtomicString& tagName)
>+static bool isNonAnchorNonNobrFormattingTag(const AtomString& tagName)
> {
> return tagName == bTag
> || tagName == bigTag
>@@ -130,13 +130,13 @@ static bool isNonAnchorNonNobrFormattingTag(const AtomicString& tagName)
> || tagName == uTag;
> }
> 
>-static bool isNonAnchorFormattingTag(const AtomicString& tagName)
>+static bool isNonAnchorFormattingTag(const AtomString& tagName)
> {
> return tagName == nobrTag || isNonAnchorNonNobrFormattingTag(tagName);
> }
> 
> // https://html.spec.whatwg.org/multipage/syntax.html#formatting
>-bool HTMLConstructionSite::isFormattingTag(const AtomicString& tagName)
>+bool HTMLConstructionSite::isFormattingTag(const AtomString& tagName)
> {
> return tagName == aTag || isNonAnchorFormattingTag(tagName);
> }
>@@ -420,7 +420,7 @@ void HTMLTreeBuilder::processFakeStartTag(const QualifiedName& tagName, Vector<A
> processStartTag(WTFMove(fakeToken));
> }
> 
>-void HTMLTreeBuilder::processFakeEndTag(const AtomicString& tagName)
>+void HTMLTreeBuilder::processFakeEndTag(const AtomString& tagName)
> {
> AtomicHTMLToken fakeToken(HTMLToken::EndTag, tagName);
> processEndTag(WTFMove(fakeToken));
>@@ -478,13 +478,13 @@ template <bool shouldClose(const HTMLStackItem&)> void HTMLTreeBuilder::processC
> m_tree.insertHTMLElement(WTFMove(token));
> }
> 
>-template <typename TableQualifiedName> static HashMap<AtomicString, QualifiedName> createCaseMap(const TableQualifiedName* const names[], unsigned length)
>+template <typename TableQualifiedName> static HashMap<AtomString, QualifiedName> createCaseMap(const TableQualifiedName* const names[], unsigned length)
> {
>- HashMap<AtomicString, QualifiedName> map;
>+ HashMap<AtomString, QualifiedName> map;
> for (unsigned i = 0; i < length; ++i) {
> const QualifiedName& name = *names[i];
>- const AtomicString& localName = name.localName();
>- AtomicString loweredLocalName = localName.convertToASCIILowercase();
>+ const AtomString& localName = name.localName();
>+ AtomString loweredLocalName = localName.convertToASCIILowercase();
> if (loweredLocalName != localName)
> map.add(loweredLocalName, name);
> }
>@@ -493,14 +493,14 @@ template <typename TableQualifiedName> static HashMap<AtomicString, QualifiedNam
> 
> static void adjustSVGTagNameCase(AtomicHTMLToken& token)
> {
>- static NeverDestroyed<HashMap<AtomicString, QualifiedName>> map = createCaseMap(SVGNames::getSVGTags(), SVGNames::SVGTagsCount);
>+ static NeverDestroyed<HashMap<AtomString, QualifiedName>> map = createCaseMap(SVGNames::getSVGTags(), SVGNames::SVGTagsCount);
> const QualifiedName& casedName = map.get().get(token.name());
> if (casedName.localName().isNull())
> return;
> token.setName(casedName.localName());
> }
> 
>-static inline void adjustAttributes(HashMap<AtomicString, QualifiedName>& map, AtomicHTMLToken& token)
>+static inline void adjustAttributes(HashMap<AtomString, QualifiedName>& map, AtomicHTMLToken& token)
> {
> for (auto& attribute : token.attributes()) {
> const QualifiedName& casedName = map.get(attribute.localName());
>@@ -511,7 +511,7 @@ static inline void adjustAttributes(HashMap<AtomicString, QualifiedName>& map, A
> 
> template<const QualifiedName* const* attributesTable(), unsigned attributesTableLength> static void adjustAttributes(AtomicHTMLToken& token)
> {
>- static NeverDestroyed<HashMap<AtomicString, QualifiedName>> map = createCaseMap(attributesTable(), attributesTableLength);
>+ static NeverDestroyed<HashMap<AtomString, QualifiedName>> map = createCaseMap(attributesTable(), attributesTableLength);
> adjustAttributes(map, token);
> }
> 
>@@ -525,20 +525,20 @@ static inline void adjustMathMLAttributes(AtomicHTMLToken& token)
> adjustAttributes<MathMLNames::getMathMLAttrs, MathMLNames::MathMLAttrsCount>(token);
> }
> 
>-static void addNamesWithPrefix(HashMap<AtomicString, QualifiedName>& map, const AtomicString& prefix, const QualifiedName* const names[], unsigned length)
>+static void addNamesWithPrefix(HashMap<AtomString, QualifiedName>& map, const AtomString& prefix, const QualifiedName* const names[], unsigned length)
> {
> for (unsigned i = 0; i < length; ++i) {
> const QualifiedName& name = *names[i];
>- const AtomicString& localName = name.localName();
>+ const AtomString& localName = name.localName();
> map.add(prefix + ':' + localName, QualifiedName(prefix, localName, name.namespaceURI()));
> }
> }
> 
>-static HashMap<AtomicString, QualifiedName> createForeignAttributesMap()
>+static HashMap<AtomString, QualifiedName> createForeignAttributesMap()
> {
>- HashMap<AtomicString, QualifiedName> map;
>+ HashMap<AtomString, QualifiedName> map;
> 
>- AtomicString xlinkName("xlink", AtomicString::ConstructFromLiteral);
>+ AtomString xlinkName("xlink", AtomString::ConstructFromLiteral);
> addNamesWithPrefix(map, xlinkName, XLinkNames::getXLinkAttrs(), XLinkNames::XLinkAttrsCount);
> addNamesWithPrefix(map, xmlAtom(), XMLNames::getXMLAttrs(), XMLNames::XMLAttrsCount);
> 
>@@ -550,7 +550,7 @@ static HashMap<AtomicString, QualifiedName> createForeignAttributesMap()
> 
> static void adjustForeignAttributes(AtomicHTMLToken& token)
> {
>- static NeverDestroyed<HashMap<AtomicString, QualifiedName>> map = createForeignAttributesMap();
>+ static NeverDestroyed<HashMap<AtomString, QualifiedName>> map = createForeignAttributesMap();
> adjustAttributes(map, token);
> }
> 
>@@ -2200,7 +2200,7 @@ void HTMLTreeBuilder::insertPhoneNumberLink(const String& string)
> Vector<Attribute> attributes;
> attributes.append(Attribute(HTMLNames::hrefAttr, makeString("tel:"_s, string)));
> 
>- const AtomicString& aTagLocalName = aTag->localName();
>+ const AtomString& aTagLocalName = aTag->localName();
> AtomicHTMLToken aStartToken(HTMLToken::StartTag, aTagLocalName, WTFMove(attributes));
> AtomicHTMLToken aEndToken(HTMLToken::EndTag, aTagLocalName);
> 
>@@ -2774,7 +2774,7 @@ void HTMLTreeBuilder::processTokenInForeignContent(AtomicHTMLToken&& token)
> processStartTag(WTFMove(token));
> return;
> }
>- const AtomicString& currentNamespace = adjustedCurrentNode.namespaceURI();
>+ const AtomString& currentNamespace = adjustedCurrentNode.namespaceURI();
> if (currentNamespace == MathMLNames::mathmlNamespaceURI)
> adjustMathMLAttributes(token);
> if (currentNamespace == SVGNames::svgNamespaceURI) {
>diff --git a/Source/WebCore/html/parser/HTMLTreeBuilder.h b/Source/WebCore/html/parser/HTMLTreeBuilder.h
>index 4a5e2b487396aaeed0a96aa2ee7a3812c3938aed..a6a391c18e76d1773a656ec567f8685c0b3cdb4b 100644
>--- a/Source/WebCore/html/parser/HTMLTreeBuilder.h
>+++ b/Source/WebCore/html/parser/HTMLTreeBuilder.h
>@@ -40,11 +40,11 @@ class ScriptElement;
> struct CustomElementConstructionData {
> WTF_MAKE_STRUCT_FAST_ALLOCATED;
> 
>- CustomElementConstructionData(Ref<JSCustomElementInterface>&&, const AtomicString& name, Vector<Attribute>&&);
>+ CustomElementConstructionData(Ref<JSCustomElementInterface>&&, const AtomString& name, Vector<Attribute>&&);
> ~CustomElementConstructionData();
> 
> Ref<JSCustomElementInterface> elementInterface;
>- AtomicString name;
>+ AtomString name;
> Vector<Attribute> attributes;
> };
> 
>@@ -143,7 +143,7 @@ private:
> 
> void processFakeStartTag(const QualifiedName&, Vector<Attribute>&& attributes = Vector<Attribute>());
> void processFakeEndTag(const QualifiedName&);
>- void processFakeEndTag(const AtomicString&);
>+ void processFakeEndTag(const AtomString&);
> void processFakeCharacters(const String&);
> void processFakePEndTagIfPInButtonScope();
> 
>diff --git a/Source/WebCore/html/shadow/DetailsMarkerControl.cpp b/Source/WebCore/html/shadow/DetailsMarkerControl.cpp
>index b6507cd3281d1f3ce3678145fdaf7e6fa4dd3015..04a9ae644b8652869e2ab42c688208bba7048d48 100644
>--- a/Source/WebCore/html/shadow/DetailsMarkerControl.cpp
>+++ b/Source/WebCore/html/shadow/DetailsMarkerControl.cpp
>@@ -49,7 +49,7 @@ Ref<DetailsMarkerControl> DetailsMarkerControl::create(Document& document)
> DetailsMarkerControl::DetailsMarkerControl(Document& document)
> : HTMLDivElement(HTMLNames::divTag, document)
> {
>- setPseudo(AtomicString("-webkit-details-marker", AtomicString::ConstructFromLiteral));
>+ setPseudo(AtomString("-webkit-details-marker", AtomString::ConstructFromLiteral));
> }
> 
> RenderPtr<RenderElement> DetailsMarkerControl::createElementRenderer(RenderStyle&& style, const RenderTreePosition&)
>diff --git a/Source/WebCore/html/shadow/MediaControlElements.cpp b/Source/WebCore/html/shadow/MediaControlElements.cpp
>index 089e139348362827bb5ed0437b6720ce61dfc996..cddc5b795d62496aca1733069953ab282fea3161 100644
>--- a/Source/WebCore/html/shadow/MediaControlElements.cpp
>+++ b/Source/WebCore/html/shadow/MediaControlElements.cpp
>@@ -94,8 +94,8 @@ WTF_MAKE_ISO_ALLOCATED_IMPL(MediaControlTextTrackContainerElement);
> 
> using namespace HTMLNames;
> 
>-static const AtomicString& getMediaControlCurrentTimeDisplayElementShadowPseudoId();
>-static const AtomicString& getMediaControlTimeRemainingDisplayElementShadowPseudoId();
>+static const AtomString& getMediaControlCurrentTimeDisplayElementShadowPseudoId();
>+static const AtomString& getMediaControlTimeRemainingDisplayElementShadowPseudoId();
> 
> MediaControlPanelElement::MediaControlPanelElement(Document& document)
> : MediaControlDivElement(document, MediaControlsPanel)
>@@ -105,7 +105,7 @@ MediaControlPanelElement::MediaControlPanelElement(Document& document)
> , m_opaque(true)
> , m_transitionTimer(*this, &MediaControlPanelElement::transitionTimerFired)
> {
>- setPseudo(AtomicString("-webkit-media-controls-panel", AtomicString::ConstructFromLiteral));
>+ setPseudo(AtomString("-webkit-media-controls-panel", AtomString::ConstructFromLiteral));
> }
> 
> Ref<MediaControlPanelElement> MediaControlPanelElement::create(Document& document)
>@@ -287,7 +287,7 @@ MediaControlPanelEnclosureElement::MediaControlPanelEnclosureElement(Document& d
> // Mapping onto same MediaControlElementType as panel element, since it has similar properties.
> : MediaControlDivElement(document, MediaControlsPanel)
> {
>- setPseudo(AtomicString("-webkit-media-controls-enclosure", AtomicString::ConstructFromLiteral));
>+ setPseudo(AtomString("-webkit-media-controls-enclosure", AtomString::ConstructFromLiteral));
> }
> 
> Ref<MediaControlPanelEnclosureElement> MediaControlPanelEnclosureElement::create(Document& document)
>@@ -301,7 +301,7 @@ MediaControlOverlayEnclosureElement::MediaControlOverlayEnclosureElement(Documen
> // Mapping onto same MediaControlElementType as panel element, since it has similar properties.
> : MediaControlDivElement(document, MediaControlsPanel)
> {
>- setPseudo(AtomicString("-webkit-media-controls-overlay-enclosure", AtomicString::ConstructFromLiteral));
>+ setPseudo(AtomString("-webkit-media-controls-overlay-enclosure", AtomString::ConstructFromLiteral));
> }
> 
> Ref<MediaControlOverlayEnclosureElement> MediaControlOverlayEnclosureElement::create(Document& document)
>@@ -314,7 +314,7 @@ Ref<MediaControlOverlayEnclosureElement> MediaControlOverlayEnclosureElement::cr
> MediaControlTimelineContainerElement::MediaControlTimelineContainerElement(Document& document)
> : MediaControlDivElement(document, MediaTimelineContainer)
> {
>- setPseudo(AtomicString("-webkit-media-controls-timeline-container", AtomicString::ConstructFromLiteral));
>+ setPseudo(AtomString("-webkit-media-controls-timeline-container", AtomString::ConstructFromLiteral));
> }
> 
> Ref<MediaControlTimelineContainerElement> MediaControlTimelineContainerElement::create(Document& document)
>@@ -349,7 +349,7 @@ RenderPtr<RenderElement> MediaControlTimelineContainerElement::createElementRend
> MediaControlVolumeSliderContainerElement::MediaControlVolumeSliderContainerElement(Document& document)
> : MediaControlDivElement(document, MediaVolumeSliderContainer)
> {
>- setPseudo(AtomicString("-webkit-media-controls-volume-slider-container", AtomicString::ConstructFromLiteral));
>+ setPseudo(AtomString("-webkit-media-controls-volume-slider-container", AtomString::ConstructFromLiteral));
> }
> 
> Ref<MediaControlVolumeSliderContainerElement> MediaControlVolumeSliderContainerElement::create(Document& document)
>@@ -386,7 +386,7 @@ MediaControlStatusDisplayElement::MediaControlStatusDisplayElement(Document& doc
> : MediaControlDivElement(document, MediaStatusDisplay)
> , m_stateBeingDisplayed(Nothing)
> {
>- setPseudo(AtomicString("-webkit-media-controls-status-display", AtomicString::ConstructFromLiteral));
>+ setPseudo(AtomString("-webkit-media-controls-status-display", AtomString::ConstructFromLiteral));
> }
> 
> Ref<MediaControlStatusDisplayElement> MediaControlStatusDisplayElement::create(Document& document)
>@@ -435,7 +435,7 @@ MediaControlPanelMuteButtonElement::MediaControlPanelMuteButtonElement(Document&
> : MediaControlMuteButtonElement(document, MediaMuteButton)
> , m_controls(controls)
> {
>- setPseudo(AtomicString("-webkit-media-controls-mute-button", AtomicString::ConstructFromLiteral));
>+ setPseudo(AtomString("-webkit-media-controls-mute-button", AtomString::ConstructFromLiteral));
> }
> 
> Ref<MediaControlPanelMuteButtonElement> MediaControlPanelMuteButtonElement::create(Document& document, MediaControls* controls)
>@@ -461,7 +461,7 @@ void MediaControlPanelMuteButtonElement::defaultEventHandler(Event& event)
> MediaControlVolumeSliderMuteButtonElement::MediaControlVolumeSliderMuteButtonElement(Document& document)
> : MediaControlMuteButtonElement(document, MediaMuteButton)
> {
>- setPseudo(AtomicString("-webkit-media-controls-volume-slider-mute-button", AtomicString::ConstructFromLiteral));
>+ setPseudo(AtomString("-webkit-media-controls-volume-slider-mute-button", AtomString::ConstructFromLiteral));
> }
> 
> Ref<MediaControlVolumeSliderMuteButtonElement> MediaControlVolumeSliderMuteButtonElement::create(Document& document)
>@@ -477,7 +477,7 @@ Ref<MediaControlVolumeSliderMuteButtonElement> MediaControlVolumeSliderMuteButto
> MediaControlPlayButtonElement::MediaControlPlayButtonElement(Document& document)
> : MediaControlInputElement(document, MediaPlayButton)
> {
>- setPseudo(AtomicString("-webkit-media-controls-play-button", AtomicString::ConstructFromLiteral));
>+ setPseudo(AtomString("-webkit-media-controls-play-button", AtomString::ConstructFromLiteral));
> }
> 
> Ref<MediaControlPlayButtonElement> MediaControlPlayButtonElement::create(Document& document)
>@@ -511,7 +511,7 @@ void MediaControlPlayButtonElement::updateDisplayType()
> MediaControlOverlayPlayButtonElement::MediaControlOverlayPlayButtonElement(Document& document)
> : MediaControlInputElement(document, MediaOverlayPlayButton)
> {
>- setPseudo(AtomicString("-webkit-media-controls-overlay-play-button", AtomicString::ConstructFromLiteral));
>+ setPseudo(AtomString("-webkit-media-controls-overlay-play-button", AtomString::ConstructFromLiteral));
> }
> 
> Ref<MediaControlOverlayPlayButtonElement> MediaControlOverlayPlayButtonElement::create(Document& document)
>@@ -545,7 +545,7 @@ void MediaControlOverlayPlayButtonElement::updateDisplayType()
> MediaControlSeekForwardButtonElement::MediaControlSeekForwardButtonElement(Document& document)
> : MediaControlSeekButtonElement(document, MediaSeekForwardButton)
> {
>- setPseudo(AtomicString("-webkit-media-controls-seek-forward-button", AtomicString::ConstructFromLiteral));
>+ setPseudo(AtomString("-webkit-media-controls-seek-forward-button", AtomString::ConstructFromLiteral));
> }
> 
> Ref<MediaControlSeekForwardButtonElement> MediaControlSeekForwardButtonElement::create(Document& document)
>@@ -561,7 +561,7 @@ Ref<MediaControlSeekForwardButtonElement> MediaControlSeekForwardButtonElement::
> MediaControlSeekBackButtonElement::MediaControlSeekBackButtonElement(Document& document)
> : MediaControlSeekButtonElement(document, MediaSeekBackButton)
> {
>- setPseudo(AtomicString("-webkit-media-controls-seek-back-button", AtomicString::ConstructFromLiteral));
>+ setPseudo(AtomString("-webkit-media-controls-seek-back-button", AtomString::ConstructFromLiteral));
> }
> 
> Ref<MediaControlSeekBackButtonElement> MediaControlSeekBackButtonElement::create(Document& document)
>@@ -577,7 +577,7 @@ Ref<MediaControlSeekBackButtonElement> MediaControlSeekBackButtonElement::create
> MediaControlRewindButtonElement::MediaControlRewindButtonElement(Document& document)
> : MediaControlInputElement(document, MediaRewindButton)
> {
>- setPseudo(AtomicString("-webkit-media-controls-rewind-button", AtomicString::ConstructFromLiteral));
>+ setPseudo(AtomString("-webkit-media-controls-rewind-button", AtomString::ConstructFromLiteral));
> }
> 
> Ref<MediaControlRewindButtonElement> MediaControlRewindButtonElement::create(Document& document)
>@@ -602,7 +602,7 @@ void MediaControlRewindButtonElement::defaultEventHandler(Event& event)
> MediaControlReturnToRealtimeButtonElement::MediaControlReturnToRealtimeButtonElement(Document& document)
> : MediaControlInputElement(document, MediaReturnToRealtimeButton)
> {
>- setPseudo(AtomicString("-webkit-media-controls-return-to-realtime-button", AtomicString::ConstructFromLiteral));
>+ setPseudo(AtomString("-webkit-media-controls-return-to-realtime-button", AtomString::ConstructFromLiteral));
> }
> 
> Ref<MediaControlReturnToRealtimeButtonElement> MediaControlReturnToRealtimeButtonElement::create(Document& document)
>@@ -634,7 +634,7 @@ MediaControlToggleClosedCaptionsButtonElement::MediaControlToggleClosedCaptionsB
> #if !PLATFORM(COCOA) && !PLATFORM(WIN) || !PLATFORM(GTK)
> UNUSED_PARAM(controls);
> #endif
>- setPseudo(AtomicString("-webkit-media-controls-toggle-closed-captions-button", AtomicString::ConstructFromLiteral));
>+ setPseudo(AtomString("-webkit-media-controls-toggle-closed-captions-button", AtomString::ConstructFromLiteral));
> }
> 
> Ref<MediaControlToggleClosedCaptionsButtonElement> MediaControlToggleClosedCaptionsButtonElement::create(Document& document, MediaControls* controls)
>@@ -680,13 +680,13 @@ void MediaControlToggleClosedCaptionsButtonElement::defaultEventHandler(Event& e
> MediaControlClosedCaptionsContainerElement::MediaControlClosedCaptionsContainerElement(Document& document)
> : MediaControlDivElement(document, MediaClosedCaptionsContainer)
> {
>- setPseudo(AtomicString("-webkit-media-controls-closed-captions-container", AtomicString::ConstructFromLiteral));
>+ setPseudo(AtomString("-webkit-media-controls-closed-captions-container", AtomString::ConstructFromLiteral));
> }
> 
> Ref<MediaControlClosedCaptionsContainerElement> MediaControlClosedCaptionsContainerElement::create(Document& document)
> {
> Ref<MediaControlClosedCaptionsContainerElement> element = adoptRef(*new MediaControlClosedCaptionsContainerElement(document));
>- element->setAttributeWithoutSynchronization(dirAttr, AtomicString("auto", AtomicString::ConstructFromLiteral));
>+ element->setAttributeWithoutSynchronization(dirAttr, AtomString("auto", AtomString::ConstructFromLiteral));
> element->hide();
> return element;
> }
>@@ -702,7 +702,7 @@ MediaControlClosedCaptionsTrackListElement::MediaControlClosedCaptionsTrackListE
> #if !ENABLE(VIDEO_TRACK)
> UNUSED_PARAM(controls);
> #endif
>- setPseudo(AtomicString("-webkit-media-controls-closed-captions-track-list", AtomicString::ConstructFromLiteral));
>+ setPseudo(AtomString("-webkit-media-controls-closed-captions-track-list", AtomString::ConstructFromLiteral));
> }
> 
> Ref<MediaControlClosedCaptionsTrackListElement> MediaControlClosedCaptionsTrackListElement::create(Document& document, MediaControls* controls)
>@@ -748,7 +748,7 @@ void MediaControlClosedCaptionsTrackListElement::defaultEventHandler(Event& even
> void MediaControlClosedCaptionsTrackListElement::updateDisplay()
> {
> #if ENABLE(VIDEO_TRACK)
>- static NeverDestroyed<AtomicString> selectedClassValue("selected", AtomicString::ConstructFromLiteral);
>+ static NeverDestroyed<AtomString> selectedClassValue("selected", AtomString::ConstructFromLiteral);
> 
> if (!mediaController()->hasClosedCaptions())
> return;
>@@ -854,7 +854,7 @@ MediaControlTimelineElement::MediaControlTimelineElement(Document& document, Med
> : MediaControlInputElement(document, MediaSlider)
> , m_controls(controls)
> {
>- setPseudo(AtomicString("-webkit-media-controls-timeline", AtomicString::ConstructFromLiteral));
>+ setPseudo(AtomString("-webkit-media-controls-timeline", AtomString::ConstructFromLiteral));
> }
> 
> Ref<MediaControlTimelineElement> MediaControlTimelineElement::create(Document& document, MediaControls* controls)
>@@ -864,7 +864,7 @@ Ref<MediaControlTimelineElement> MediaControlTimelineElement::create(Document& d
> Ref<MediaControlTimelineElement> timeline = adoptRef(*new MediaControlTimelineElement(document, controls));
> timeline->ensureUserAgentShadowRoot();
> timeline->setType("range");
>- timeline->setAttributeWithoutSynchronization(precisionAttr, AtomicString("float", AtomicString::ConstructFromLiteral));
>+ timeline->setAttributeWithoutSynchronization(precisionAttr, AtomString("float", AtomString::ConstructFromLiteral));
> return timeline;
> }
> 
>@@ -914,7 +914,7 @@ void MediaControlTimelineElement::setPosition(double currentTime)
> 
> void MediaControlTimelineElement::setDuration(double duration)
> {
>- setAttribute(maxAttr, AtomicString::number(duration));
>+ setAttribute(maxAttr, AtomString::number(duration));
> }
> 
> // ----------------------------
>@@ -922,7 +922,7 @@ void MediaControlTimelineElement::setDuration(double duration)
> MediaControlPanelVolumeSliderElement::MediaControlPanelVolumeSliderElement(Document& document)
> : MediaControlVolumeSliderElement(document)
> {
>- setPseudo(AtomicString("-webkit-media-controls-volume-slider", AtomicString::ConstructFromLiteral));
>+ setPseudo(AtomString("-webkit-media-controls-volume-slider", AtomString::ConstructFromLiteral));
> }
> 
> Ref<MediaControlPanelVolumeSliderElement> MediaControlPanelVolumeSliderElement::create(Document& document)
>@@ -930,8 +930,8 @@ Ref<MediaControlPanelVolumeSliderElement> MediaControlPanelVolumeSliderElement::
> Ref<MediaControlPanelVolumeSliderElement> slider = adoptRef(*new MediaControlPanelVolumeSliderElement(document));
> slider->ensureUserAgentShadowRoot();
> slider->setType("range");
>- slider->setAttributeWithoutSynchronization(precisionAttr, AtomicString("float", AtomicString::ConstructFromLiteral));
>- slider->setAttributeWithoutSynchronization(maxAttr, AtomicString("1", AtomicString::ConstructFromLiteral));
>+ slider->setAttributeWithoutSynchronization(precisionAttr, AtomString("float", AtomString::ConstructFromLiteral));
>+ slider->setAttributeWithoutSynchronization(maxAttr, AtomString("1", AtomString::ConstructFromLiteral));
> return slider;
> }
> 
>@@ -940,7 +940,7 @@ Ref<MediaControlPanelVolumeSliderElement> MediaControlPanelVolumeSliderElement::
> MediaControlFullscreenVolumeSliderElement::MediaControlFullscreenVolumeSliderElement(Document& document)
> : MediaControlVolumeSliderElement(document)
> {
>- setPseudo(AtomicString("-webkit-media-controls-fullscreen-volume-slider", AtomicString::ConstructFromLiteral));
>+ setPseudo(AtomString("-webkit-media-controls-fullscreen-volume-slider", AtomString::ConstructFromLiteral));
> }
> 
> Ref<MediaControlFullscreenVolumeSliderElement> MediaControlFullscreenVolumeSliderElement::create(Document& document)
>@@ -948,8 +948,8 @@ Ref<MediaControlFullscreenVolumeSliderElement> MediaControlFullscreenVolumeSlide
> Ref<MediaControlFullscreenVolumeSliderElement> slider = adoptRef(*new MediaControlFullscreenVolumeSliderElement(document));
> slider->ensureUserAgentShadowRoot();
> slider->setType("range");
>- slider->setAttributeWithoutSynchronization(precisionAttr, AtomicString("float", AtomicString::ConstructFromLiteral));
>- slider->setAttributeWithoutSynchronization(maxAttr, AtomicString("1", AtomicString::ConstructFromLiteral));
>+ slider->setAttributeWithoutSynchronization(precisionAttr, AtomString("float", AtomString::ConstructFromLiteral));
>+ slider->setAttributeWithoutSynchronization(maxAttr, AtomString("1", AtomString::ConstructFromLiteral));
> return slider;
> }
> 
>@@ -958,7 +958,7 @@ Ref<MediaControlFullscreenVolumeSliderElement> MediaControlFullscreenVolumeSlide
> MediaControlFullscreenButtonElement::MediaControlFullscreenButtonElement(Document& document)
> : MediaControlInputElement(document, MediaEnterFullscreenButton)
> {
>- setPseudo(AtomicString("-webkit-media-controls-fullscreen-button", AtomicString::ConstructFromLiteral));
>+ setPseudo(AtomString("-webkit-media-controls-fullscreen-button", AtomString::ConstructFromLiteral));
> }
> 
> Ref<MediaControlFullscreenButtonElement> MediaControlFullscreenButtonElement::create(Document& document)
>@@ -1002,7 +1002,7 @@ void MediaControlFullscreenButtonElement::setIsFullscreen(bool isFullscreen)
> MediaControlFullscreenVolumeMinButtonElement::MediaControlFullscreenVolumeMinButtonElement(Document& document)
> : MediaControlInputElement(document, MediaUnMuteButton)
> {
>- setPseudo(AtomicString("-webkit-media-controls-fullscreen-volume-min-button", AtomicString::ConstructFromLiteral));
>+ setPseudo(AtomString("-webkit-media-controls-fullscreen-volume-min-button", AtomString::ConstructFromLiteral));
> }
> 
> Ref<MediaControlFullscreenVolumeMinButtonElement> MediaControlFullscreenVolumeMinButtonElement::create(Document& document)
>@@ -1027,7 +1027,7 @@ void MediaControlFullscreenVolumeMinButtonElement::defaultEventHandler(Event& ev
> MediaControlFullscreenVolumeMaxButtonElement::MediaControlFullscreenVolumeMaxButtonElement(Document& document)
> : MediaControlInputElement(document, MediaMuteButton)
> {
>- setPseudo(AtomicString("-webkit-media-controls-fullscreen-volume-max-button", AtomicString::ConstructFromLiteral));
>+ setPseudo(AtomString("-webkit-media-controls-fullscreen-volume-max-button", AtomString::ConstructFromLiteral));
> }
> 
> Ref<MediaControlFullscreenVolumeMaxButtonElement> MediaControlFullscreenVolumeMaxButtonElement::create(Document& document)
>@@ -1060,9 +1060,9 @@ Ref<MediaControlTimeRemainingDisplayElement> MediaControlTimeRemainingDisplayEle
> return adoptRef(*new MediaControlTimeRemainingDisplayElement(document));
> }
> 
>-static const AtomicString& getMediaControlTimeRemainingDisplayElementShadowPseudoId()
>+static const AtomString& getMediaControlTimeRemainingDisplayElementShadowPseudoId()
> {
>- static NeverDestroyed<AtomicString> id("-webkit-media-controls-time-remaining-display", AtomicString::ConstructFromLiteral);
>+ static NeverDestroyed<AtomString> id("-webkit-media-controls-time-remaining-display", AtomString::ConstructFromLiteral);
> return id;
> }
> 
>@@ -1079,9 +1079,9 @@ Ref<MediaControlCurrentTimeDisplayElement> MediaControlCurrentTimeDisplayElement
> return adoptRef(*new MediaControlCurrentTimeDisplayElement(document));
> }
> 
>-static const AtomicString& getMediaControlCurrentTimeDisplayElementShadowPseudoId()
>+static const AtomString& getMediaControlCurrentTimeDisplayElementShadowPseudoId()
> {
>- static NeverDestroyed<AtomicString> id("-webkit-media-controls-current-time-display", AtomicString::ConstructFromLiteral);
>+ static NeverDestroyed<AtomString> id("-webkit-media-controls-current-time-display", AtomString::ConstructFromLiteral);
> return id;
> }
> 
>@@ -1096,7 +1096,7 @@ MediaControlTextTrackContainerElement::MediaControlTextTrackContainerElement(Doc
> , m_fontSizeIsImportant(false)
> , m_updateTextTrackRepresentationStyle(false)
> {
>- setPseudo(AtomicString("-webkit-media-text-track-container", AtomicString::ConstructFromLiteral));
>+ setPseudo(AtomString("-webkit-media-text-track-container", AtomString::ConstructFromLiteral));
> }
> 
> Ref<MediaControlTextTrackContainerElement> MediaControlTextTrackContainerElement::create(Document& document)
>diff --git a/Source/WebCore/html/shadow/MediaControls.cpp b/Source/WebCore/html/shadow/MediaControls.cpp
>index 631b88238dcc93928467852477d83bdcfc69c59f..a7dbdadb3288ec3bf7d090dcc56b279320b92fc0 100644
>--- a/Source/WebCore/html/shadow/MediaControls.cpp
>+++ b/Source/WebCore/html/shadow/MediaControls.cpp
>@@ -59,7 +59,7 @@ MediaControls::MediaControls(Document& document)
> , m_isFullscreen(false)
> , m_isMouseOverControls(false)
> {
>- setPseudo(AtomicString("-webkit-media-controls", AtomicString::ConstructFromLiteral));
>+ setPseudo(AtomString("-webkit-media-controls", AtomString::ConstructFromLiteral));
> }
> 
> void MediaControls::setMediaController(MediaControllerInterface* controller)
>diff --git a/Source/WebCore/html/shadow/ProgressShadowElement.h b/Source/WebCore/html/shadow/ProgressShadowElement.h
>index 900d72c1bf549dc475fe02e3e16857fd626d1ef5..6dc89c9dc3c5c519d30c8c532663b29204106fd1 100644
>--- a/Source/WebCore/html/shadow/ProgressShadowElement.h
>+++ b/Source/WebCore/html/shadow/ProgressShadowElement.h
>@@ -67,7 +67,7 @@ private:
> inline Ref<ProgressInnerElement> ProgressInnerElement::create(Document& document)
> {
> Ref<ProgressInnerElement> result = adoptRef(*new ProgressInnerElement(document));
>- result->setPseudo(AtomicString("-webkit-progress-inner-element", AtomicString::ConstructFromLiteral));
>+ result->setPseudo(AtomString("-webkit-progress-inner-element", AtomString::ConstructFromLiteral));
> return result;
> }
> 
>@@ -82,7 +82,7 @@ private:
> inline Ref<ProgressBarElement> ProgressBarElement::create(Document& document)
> {
> Ref<ProgressBarElement> result = adoptRef(*new ProgressBarElement(document));
>- result->setPseudo(AtomicString("-webkit-progress-bar", AtomicString::ConstructFromLiteral));
>+ result->setPseudo(AtomString("-webkit-progress-bar", AtomString::ConstructFromLiteral));
> return result;
> }
> 
>@@ -98,7 +98,7 @@ private:
> inline Ref<ProgressValueElement> ProgressValueElement::create(Document& document)
> {
> Ref<ProgressValueElement> result = adoptRef(*new ProgressValueElement(document));
>- result->setPseudo(AtomicString("-webkit-progress-value", AtomicString::ConstructFromLiteral));
>+ result->setPseudo(AtomString("-webkit-progress-value", AtomString::ConstructFromLiteral));
> return result;
> }
> 
>diff --git a/Source/WebCore/html/shadow/SliderThumbElement.cpp b/Source/WebCore/html/shadow/SliderThumbElement.cpp
>index 0d443c172348579255d6978de78d55fc7f6930c5..f23adba38e8ebe51d391752b22f1a85322d50ecd 100644
>--- a/Source/WebCore/html/shadow/SliderThumbElement.cpp
>+++ b/Source/WebCore/html/shadow/SliderThumbElement.cpp
>@@ -356,7 +356,7 @@ void SliderThumbElement::defaultEventHandler(Event& event)
> 
> MouseEvent& mouseEvent = downcast<MouseEvent>(event);
> bool isLeftButton = mouseEvent.button() == LeftButton;
>- const AtomicString& eventType = mouseEvent.type();
>+ const AtomString& eventType = mouseEvent.type();
> 
> // We intentionally do not call event->setDefaultHandled() here because
> // MediaControlTimelineElement::defaultEventHandler() wants to handle these
>@@ -523,7 +523,7 @@ void SliderThumbElement::handleTouchEvent(TouchEvent& touchEvent)
> return;
> }
> 
>- const AtomicString& eventType = touchEvent.type();
>+ const AtomString& eventType = touchEvent.type();
> if (eventType == eventNames().touchstartEvent) {
> handleTouchStart(touchEvent);
> return;
>@@ -594,8 +594,8 @@ Optional<ElementStyle> SliderThumbElement::resolveCustomStyle(const RenderStyle&
> {
> // This doesn't actually compute style. This is just a hack to pick shadow pseudo id when host style is known.
> 
>- static NeverDestroyed<const AtomicString> sliderThumbShadowPseudoId("-webkit-slider-thumb", AtomicString::ConstructFromLiteral);
>- static NeverDestroyed<const AtomicString> mediaSliderThumbShadowPseudoId("-webkit-media-slider-thumb", AtomicString::ConstructFromLiteral);
>+ static NeverDestroyed<const AtomString> sliderThumbShadowPseudoId("-webkit-slider-thumb", AtomString::ConstructFromLiteral);
>+ static NeverDestroyed<const AtomString> mediaSliderThumbShadowPseudoId("-webkit-media-slider-thumb", AtomString::ConstructFromLiteral);
> 
> if (!hostStyle)
> return WTF::nullopt;
>@@ -616,7 +616,7 @@ Optional<ElementStyle> SliderThumbElement::resolveCustomStyle(const RenderStyle&
> return WTF::nullopt;
> }
> 
>-const AtomicString& SliderThumbElement::shadowPseudoId() const
>+const AtomString& SliderThumbElement::shadowPseudoId() const
> {
> return m_shadowPseudoId;
> }
>@@ -648,8 +648,8 @@ Optional<ElementStyle> SliderContainerElement::resolveCustomStyle(const RenderSt
> {
> // This doesn't actually compute style. This is just a hack to pick shadow pseudo id when host style is known.
> 
>- static NeverDestroyed<const AtomicString> mediaSliderContainer("-webkit-media-slider-container", AtomicString::ConstructFromLiteral);
>- static NeverDestroyed<const AtomicString> sliderContainer("-webkit-slider-container", AtomicString::ConstructFromLiteral);
>+ static NeverDestroyed<const AtomString> mediaSliderContainer("-webkit-media-slider-container", AtomString::ConstructFromLiteral);
>+ static NeverDestroyed<const AtomString> sliderContainer("-webkit-slider-container", AtomString::ConstructFromLiteral);
> 
> if (!hostStyle)
> return WTF::nullopt;
>@@ -670,7 +670,7 @@ Optional<ElementStyle> SliderContainerElement::resolveCustomStyle(const RenderSt
> return WTF::nullopt;
> }
> 
>-const AtomicString& SliderContainerElement::shadowPseudoId() const
>+const AtomString& SliderContainerElement::shadowPseudoId() const
> {
> return m_shadowPseudoId;
> }
>diff --git a/Source/WebCore/html/shadow/SliderThumbElement.h b/Source/WebCore/html/shadow/SliderThumbElement.h
>index 6bab3f292e6a7d9c5465e091d8e9ba801c8991e8..b018b98b25a95fe226847c55876f9415ab4ad77c 100644
>--- a/Source/WebCore/html/shadow/SliderThumbElement.h
>+++ b/Source/WebCore/html/shadow/SliderThumbElement.h
>@@ -78,7 +78,7 @@ private:
> void willDetachRenderers() final;
> 
> Optional<ElementStyle> resolveCustomStyle(const RenderStyle&, const RenderStyle*) final;
>- const AtomicString& shadowPseudoId() const final;
>+ const AtomString& shadowPseudoId() const final;
> 
> void startDragging();
> void stopDragging();
>@@ -97,7 +97,7 @@ private:
> void unregisterForTouchEvents();
> #endif
> 
>- AtomicString m_shadowPseudoId;
>+ AtomString m_shadowPseudoId;
> bool m_inDragMode { false };
> 
> #if ENABLE(IOS_TOUCH_EVENTS)
>@@ -137,10 +137,10 @@ private:
> SliderContainerElement(Document&);
> RenderPtr<RenderElement> createElementRenderer(RenderStyle&&, const RenderTreePosition&) final;
> Optional<ElementStyle> resolveCustomStyle(const RenderStyle&, const RenderStyle*) final;
>- const AtomicString& shadowPseudoId() const final;
>+ const AtomString& shadowPseudoId() const final;
> bool isSliderContainerElement() const final { return true; }
> 
>- AtomicString m_shadowPseudoId;
>+ AtomString m_shadowPseudoId;
> };
> 
> } // namespace WebCore
>diff --git a/Source/WebCore/html/shadow/SpinButtonElement.cpp b/Source/WebCore/html/shadow/SpinButtonElement.cpp
>index 782bdc037617aa79e9f298addbe40584be4ad115..f605483445e455a7650088e849a5a9c145d9972e 100644
>--- a/Source/WebCore/html/shadow/SpinButtonElement.cpp
>+++ b/Source/WebCore/html/shadow/SpinButtonElement.cpp
>@@ -56,7 +56,7 @@ inline SpinButtonElement::SpinButtonElement(Document& document, SpinButtonOwner&
> , m_repeatingTimer(*this, &SpinButtonElement::repeatingTimerFired)
> {
> setHasCustomStyleResolveCallbacks();
>- setPseudo(AtomicString("-webkit-inner-spin-button", AtomicString::ConstructFromLiteral));
>+ setPseudo(AtomString("-webkit-inner-spin-button", AtomString::ConstructFromLiteral));
> }
> 
> Ref<SpinButtonElement> SpinButtonElement::create(Document& document, SpinButtonOwner& spinButtonOwner)
>diff --git a/Source/WebCore/html/shadow/TextControlInnerElements.cpp b/Source/WebCore/html/shadow/TextControlInnerElements.cpp
>index a2a2f0b09ee61938fd88fac76325b2420a29aa9a..3a637daef0124e2e4ed336b663752d0022b5be01 100644
>--- a/Source/WebCore/html/shadow/TextControlInnerElements.cpp
>+++ b/Source/WebCore/html/shadow/TextControlInnerElements.cpp
>@@ -182,7 +182,7 @@ Optional<ElementStyle> TextControlInnerTextElement::resolveCustomStyle(const Ren
> inline TextControlPlaceholderElement::TextControlPlaceholderElement(Document& document)
> : HTMLDivElement(divTag, document)
> {
>- setPseudo(AtomicString("placeholder", AtomicString::ConstructFromLiteral));
>+ setPseudo(AtomString("placeholder", AtomString::ConstructFromLiteral));
> setHasCustomStyleResolveCallbacks();
> }
> 
>@@ -252,11 +252,11 @@ bool SearchFieldResultsButtonElement::willRespondToMouseClickEvents()
> inline SearchFieldCancelButtonElement::SearchFieldCancelButtonElement(Document& document)
> : HTMLDivElement(divTag, document)
> {
>- setPseudo(AtomicString("-webkit-search-cancel-button", AtomicString::ConstructFromLiteral));
>+ setPseudo(AtomString("-webkit-search-cancel-button", AtomString::ConstructFromLiteral));
> #if !PLATFORM(IOS_FAMILY)
> setAttributeWithoutSynchronization(aria_labelAttr, AXSearchFieldCancelButtonText());
> #endif
>- setAttributeWithoutSynchronization(roleAttr, AtomicString("button", AtomicString::ConstructFromLiteral));
>+ setAttributeWithoutSynchronization(roleAttr, AtomString("button", AtomString::ConstructFromLiteral));
> }
> 
> Ref<SearchFieldCancelButtonElement> SearchFieldCancelButtonElement::create(Document& document)
>diff --git a/Source/WebCore/html/shadow/YouTubeEmbedShadowElement.cpp b/Source/WebCore/html/shadow/YouTubeEmbedShadowElement.cpp
>index 4551cd40e0b8a3905872a565073dc0fa703f5d8e..88026014ffef200a5b6c338a127374a60b1bff63 100644
>--- a/Source/WebCore/html/shadow/YouTubeEmbedShadowElement.cpp
>+++ b/Source/WebCore/html/shadow/YouTubeEmbedShadowElement.cpp
>@@ -41,7 +41,7 @@ Ref<YouTubeEmbedShadowElement> YouTubeEmbedShadowElement::create(Document& doc)
> YouTubeEmbedShadowElement::YouTubeEmbedShadowElement(Document& document)
> : HTMLDivElement(HTMLNames::divTag, document)
> {
>- setPseudo(AtomicString("-webkit-plugin-replacement", AtomicString::ConstructFromLiteral));
>+ setPseudo(AtomString("-webkit-plugin-replacement", AtomString::ConstructFromLiteral));
> }
> 
> RenderPtr<RenderElement> YouTubeEmbedShadowElement::createElementRenderer(RenderStyle&& style, const RenderTreePosition&)
>diff --git a/Source/WebCore/html/shadow/mac/ImageControlsButtonElementMac.cpp b/Source/WebCore/html/shadow/mac/ImageControlsButtonElementMac.cpp
>index 3eab5a01be9e80247b3953fc5e2e787892a19378..8ee2392396e31dca92f7e25b15aa3274f291390e 100644
>--- a/Source/WebCore/html/shadow/mac/ImageControlsButtonElementMac.cpp
>+++ b/Source/WebCore/html/shadow/mac/ImageControlsButtonElementMac.cpp
>@@ -95,7 +95,7 @@ RefPtr<ImageControlsButtonElementMac> ImageControlsButtonElementMac::tryCreate(D
> return nullptr;
> 
> auto button = adoptRef(*new ImageControlsButtonElementMac(document));
>- button->setAttributeWithoutSynchronization(HTMLNames::classAttr, AtomicString("x-webkit-image-controls-button", AtomicString::ConstructFromLiteral));
>+ button->setAttributeWithoutSynchronization(HTMLNames::classAttr, AtomString("x-webkit-image-controls-button", AtomString::ConstructFromLiteral));
> 
> IntSize positionOffset = RenderTheme::singleton().imageControlsButtonPositionOffset();
> button->setInlineStyleProperty(CSSPropertyTop, positionOffset.height(), CSSPrimitiveValue::CSS_PX);
>diff --git a/Source/WebCore/html/shadow/mac/ImageControlsRootElementMac.cpp b/Source/WebCore/html/shadow/mac/ImageControlsRootElementMac.cpp
>index 88ef2baaa922c3584c670c7ea2590f5de34b8af4..88d39e15fed8779a6ee320f94beec96bbc8058c0 100644
>--- a/Source/WebCore/html/shadow/mac/ImageControlsRootElementMac.cpp
>+++ b/Source/WebCore/html/shadow/mac/ImageControlsRootElementMac.cpp
>@@ -87,7 +87,7 @@ RefPtr<ImageControlsRootElement> ImageControlsRootElement::tryCreate(Document& d
> return nullptr;
> 
> Ref<ImageControlsRootElementMac> controls = adoptRef(*new ImageControlsRootElementMac(document));
>- controls->setAttributeWithoutSynchronization(HTMLNames::classAttr, AtomicString("x-webkit-image-controls", AtomicString::ConstructFromLiteral));
>+ controls->setAttributeWithoutSynchronization(HTMLNames::classAttr, AtomString("x-webkit-image-controls", AtomString::ConstructFromLiteral));
> 
> if (RefPtr<ImageControlsButtonElementMac> button = ImageControlsButtonElementMac::tryCreate(document))
> controls->appendChild(*button);
>diff --git a/Source/WebCore/html/track/AudioTrack.cpp b/Source/WebCore/html/track/AudioTrack.cpp
>index 7e5abd34fd0fa8a50be2f03a0a312ace87bb8670..f8a7eb531e3706922a3a9a97415a3563d09857a7 100644
>--- a/Source/WebCore/html/track/AudioTrack.cpp
>+++ b/Source/WebCore/html/track/AudioTrack.cpp
>@@ -39,39 +39,39 @@
> 
> namespace WebCore {
> 
>-const AtomicString& AudioTrack::alternativeKeyword()
>+const AtomString& AudioTrack::alternativeKeyword()
> {
>- static NeverDestroyed<AtomicString> alternative("alternative", AtomicString::ConstructFromLiteral);
>+ static NeverDestroyed<AtomString> alternative("alternative", AtomString::ConstructFromLiteral);
> return alternative;
> }
> 
>-const AtomicString& AudioTrack::descriptionKeyword()
>+const AtomString& AudioTrack::descriptionKeyword()
> {
>- static NeverDestroyed<AtomicString> description("description", AtomicString::ConstructFromLiteral);
>+ static NeverDestroyed<AtomString> description("description", AtomString::ConstructFromLiteral);
> return description;
> }
> 
>-const AtomicString& AudioTrack::mainKeyword()
>+const AtomString& AudioTrack::mainKeyword()
> {
>- static NeverDestroyed<AtomicString> main("main", AtomicString::ConstructFromLiteral);
>+ static NeverDestroyed<AtomString> main("main", AtomString::ConstructFromLiteral);
> return main;
> }
> 
>-const AtomicString& AudioTrack::mainDescKeyword()
>+const AtomString& AudioTrack::mainDescKeyword()
> {
>- static NeverDestroyed<AtomicString> mainDesc("main-desc", AtomicString::ConstructFromLiteral);
>+ static NeverDestroyed<AtomString> mainDesc("main-desc", AtomString::ConstructFromLiteral);
> return mainDesc;
> }
> 
>-const AtomicString& AudioTrack::translationKeyword()
>+const AtomString& AudioTrack::translationKeyword()
> {
>- static NeverDestroyed<AtomicString> translation("translation", AtomicString::ConstructFromLiteral);
>+ static NeverDestroyed<AtomString> translation("translation", AtomString::ConstructFromLiteral);
> return translation;
> }
> 
>-const AtomicString& AudioTrack::commentaryKeyword()
>+const AtomString& AudioTrack::commentaryKeyword()
> {
>- static NeverDestroyed<AtomicString> commentary("commentary", AtomicString::ConstructFromLiteral);
>+ static NeverDestroyed<AtomString> commentary("commentary", AtomString::ConstructFromLiteral);
> return commentary;
> }
> 
>@@ -109,7 +109,7 @@ void AudioTrack::setPrivate(AudioTrackPrivate& trackPrivate)
> updateKindFromPrivate();
> }
> 
>-bool AudioTrack::isValidKind(const AtomicString& value) const
>+bool AudioTrack::isValidKind(const AtomString& value) const
> {
> return value == alternativeKeyword()
> || value == commentaryKeyword()
>@@ -143,17 +143,17 @@ void AudioTrack::enabledChanged(bool enabled)
> m_client->audioTrackEnabledChanged(*this);
> }
> 
>-void AudioTrack::idChanged(const AtomicString& id)
>+void AudioTrack::idChanged(const AtomString& id)
> {
> setId(id);
> }
> 
>-void AudioTrack::labelChanged(const AtomicString& label)
>+void AudioTrack::labelChanged(const AtomString& label)
> {
> setLabel(label);
> }
> 
>-void AudioTrack::languageChanged(const AtomicString& language)
>+void AudioTrack::languageChanged(const AtomString& language)
> {
> setLanguage(language);
> }
>diff --git a/Source/WebCore/html/track/AudioTrack.h b/Source/WebCore/html/track/AudioTrack.h
>index 56ad1487a68d4ca57974bc15843366cf15c25010..5695300f6db1ebe600b71d39bc4715eeb5925959 100644
>--- a/Source/WebCore/html/track/AudioTrack.h
>+++ b/Source/WebCore/html/track/AudioTrack.h
>@@ -49,12 +49,12 @@ public:
> }
> virtual ~AudioTrack();
> 
>- static const AtomicString& alternativeKeyword();
>- static const AtomicString& descriptionKeyword();
>- static const AtomicString& mainKeyword();
>- static const AtomicString& mainDescKeyword();
>- static const AtomicString& translationKeyword();
>- static const AtomicString& commentaryKeyword();
>+ static const AtomString& alternativeKeyword();
>+ static const AtomString& descriptionKeyword();
>+ static const AtomString& mainKeyword();
>+ static const AtomString& mainDescKeyword();
>+ static const AtomString& translationKeyword();
>+ static const AtomString& commentaryKeyword();
> 
> bool enabled() const final { return m_enabled; }
> void setEnabled(const bool);
>@@ -70,15 +70,15 @@ public:
> private:
> AudioTrack(AudioTrackClient&, AudioTrackPrivate&);
> 
>- bool isValidKind(const AtomicString&) const final;
>+ bool isValidKind(const AtomString&) const final;
> 
> // AudioTrackPrivateClient
> void enabledChanged(bool) final;
> 
> // TrackPrivateBaseClient
>- void idChanged(const AtomicString&) final;
>- void labelChanged(const AtomicString&) final;
>- void languageChanged(const AtomicString&) final;
>+ void idChanged(const AtomString&) final;
>+ void labelChanged(const AtomString&) final;
>+ void languageChanged(const AtomString&) final;
> void willRemove() final;
> 
> void updateKindFromPrivate();
>diff --git a/Source/WebCore/html/track/AudioTrackList.cpp b/Source/WebCore/html/track/AudioTrackList.cpp
>index aaddcde357567622a4d78b5c1f288f75f415d6dc..2e0361e27f9711a834b9dba246e6d722cf653d04 100644
>--- a/Source/WebCore/html/track/AudioTrackList.cpp
>+++ b/Source/WebCore/html/track/AudioTrackList.cpp
>@@ -66,7 +66,7 @@ AudioTrack* AudioTrackList::item(unsigned index) const
> return nullptr;
> }
> 
>-AudioTrack* AudioTrackList::getTrackById(const AtomicString& id) const
>+AudioTrack* AudioTrackList::getTrackById(const AtomString& id) const
> {
> for (auto& inbandTrack : m_inbandTracks) {
> auto& track = downcast<AudioTrack>(*inbandTrack);
>diff --git a/Source/WebCore/html/track/AudioTrackList.h b/Source/WebCore/html/track/AudioTrackList.h
>index dbe0145724a6d46d7951f22e402957a483506bab..6ed8778e6ebf2988f3447efc8781cecfd7e93983 100644
>--- a/Source/WebCore/html/track/AudioTrackList.h
>+++ b/Source/WebCore/html/track/AudioTrackList.h
>@@ -41,7 +41,7 @@ public:
> }
> virtual ~AudioTrackList();
> 
>- AudioTrack* getTrackById(const AtomicString&) const;
>+ AudioTrack* getTrackById(const AtomString&) const;
> 
> AudioTrack* item(unsigned index) const;
> AudioTrack* lastItem() const { return item(length() - 1); }
>diff --git a/Source/WebCore/html/track/InbandTextTrack.cpp b/Source/WebCore/html/track/InbandTextTrack.cpp
>index ecbb2e2441f5591cb3296219433eeb8e989b287f..4cf1c85763684f4535f2c5b224f83db821693391 100644
>--- a/Source/WebCore/html/track/InbandTextTrack.cpp
>+++ b/Source/WebCore/html/track/InbandTextTrack.cpp
>@@ -137,22 +137,22 @@ size_t InbandTextTrack::inbandTrackIndex()
> return m_private->trackIndex();
> }
> 
>-AtomicString InbandTextTrack::inBandMetadataTrackDispatchType() const
>+AtomString InbandTextTrack::inBandMetadataTrackDispatchType() const
> {
> return m_private->inBandMetadataTrackDispatchType();
> }
> 
>-void InbandTextTrack::idChanged(const AtomicString& id)
>+void InbandTextTrack::idChanged(const AtomString& id)
> {
> setId(id);
> }
> 
>-void InbandTextTrack::labelChanged(const AtomicString& label)
>+void InbandTextTrack::labelChanged(const AtomString& label)
> {
> setLabel(label);
> }
> 
>-void InbandTextTrack::languageChanged(const AtomicString& language)
>+void InbandTextTrack::languageChanged(const AtomString& language)
> {
> setLanguage(language);
> }
>diff --git a/Source/WebCore/html/track/InbandTextTrack.h b/Source/WebCore/html/track/InbandTextTrack.h
>index 23c8aa8afaa56d1fbd8494847893cd18e31ed331..e2ae9b239f302976b7cdd3f344dfd2c14a638a8a 100644
>--- a/Source/WebCore/html/track/InbandTextTrack.h
>+++ b/Source/WebCore/html/track/InbandTextTrack.h
>@@ -46,7 +46,7 @@ public:
> void setMode(Mode) override;
> size_t inbandTrackIndex();
> 
>- AtomicString inBandMetadataTrackDispatchType() const override;
>+ AtomString inBandMetadataTrackDispatchType() const override;
> 
> void setPrivate(InbandTextTrackPrivate&);
> void setMediaElement(HTMLMediaElement*) override;
>@@ -61,9 +61,9 @@ protected:
> 
> private:
> bool isInband() const final { return true; }
>- void idChanged(const AtomicString&) override;
>- void labelChanged(const AtomicString&) override;
>- void languageChanged(const AtomicString&) override;
>+ void idChanged(const AtomString&) override;
>+ void labelChanged(const AtomString&) override;
>+ void languageChanged(const AtomString&) override;
> void willRemove() override;
> 
> void addDataCue(const MediaTime&, const MediaTime&, const void*, unsigned) override { ASSERT_NOT_REACHED(); }
>diff --git a/Source/WebCore/html/track/LoadableTextTrack.cpp b/Source/WebCore/html/track/LoadableTextTrack.cpp
>index 3151b7fac32e4fad9c81fd85abc205e7b06f9a02..8f29c7f1679a0fa2918decfa513e2d80271a35e2 100644
>--- a/Source/WebCore/html/track/LoadableTextTrack.cpp
>+++ b/Source/WebCore/html/track/LoadableTextTrack.cpp
>@@ -140,7 +140,7 @@ void LoadableTextTrack::newStyleSheetsAvailable(TextTrackLoader& loader)
> m_styleSheets = m_loader->getNewStyleSheets();
> }
> 
>-AtomicString LoadableTextTrack::id() const
>+AtomString LoadableTextTrack::id() const
> {
> if (!m_trackElement)
> return emptyAtom();
>diff --git a/Source/WebCore/html/track/LoadableTextTrack.h b/Source/WebCore/html/track/LoadableTextTrack.h
>index b415536e41bc011fecaa954b92597d10e8edc31c..dc471243087d6752cbd7cda655a496b56a4539dc 100644
>--- a/Source/WebCore/html/track/LoadableTextTrack.h
>+++ b/Source/WebCore/html/track/LoadableTextTrack.h
>@@ -59,7 +59,7 @@ private:
> void newRegionsAvailable(TextTrackLoader&) final;
> void newStyleSheetsAvailable(TextTrackLoader&) final;
> 
>- AtomicString id() const final;
>+ AtomString id() const final;
> bool isDefault() const final { return m_isDefault; }
> Element* element() final;
> 
>diff --git a/Source/WebCore/html/track/TextTrack.cpp b/Source/WebCore/html/track/TextTrack.cpp
>index 6aff838d004bbab83dcdff7148b311fbc8620050..59a19246209b009ac014aba9b720f322d5617977 100644
>--- a/Source/WebCore/html/track/TextTrack.cpp
>+++ b/Source/WebCore/html/track/TextTrack.cpp
>@@ -49,39 +49,39 @@ namespace WebCore {
> 
> WTF_MAKE_ISO_ALLOCATED_IMPL(TextTrack);
> 
>-const AtomicString& TextTrack::subtitlesKeyword()
>+const AtomString& TextTrack::subtitlesKeyword()
> {
>- static NeverDestroyed<const AtomicString> subtitles("subtitles", AtomicString::ConstructFromLiteral);
>+ static NeverDestroyed<const AtomString> subtitles("subtitles", AtomString::ConstructFromLiteral);
> return subtitles;
> }
> 
>-static const AtomicString& captionsKeyword()
>+static const AtomString& captionsKeyword()
> {
>- static NeverDestroyed<const AtomicString> captions("captions", AtomicString::ConstructFromLiteral);
>+ static NeverDestroyed<const AtomString> captions("captions", AtomString::ConstructFromLiteral);
> return captions;
> }
> 
>-static const AtomicString& descriptionsKeyword()
>+static const AtomString& descriptionsKeyword()
> {
>- static NeverDestroyed<const AtomicString> descriptions("descriptions", AtomicString::ConstructFromLiteral);
>+ static NeverDestroyed<const AtomString> descriptions("descriptions", AtomString::ConstructFromLiteral);
> return descriptions;
> }
> 
>-static const AtomicString& chaptersKeyword()
>+static const AtomString& chaptersKeyword()
> {
>- static NeverDestroyed<const AtomicString> chapters("chapters", AtomicString::ConstructFromLiteral);
>+ static NeverDestroyed<const AtomString> chapters("chapters", AtomString::ConstructFromLiteral);
> return chapters;
> }
> 
>-static const AtomicString& metadataKeyword()
>+static const AtomString& metadataKeyword()
> {
>- static NeverDestroyed<const AtomicString> metadata("metadata", AtomicString::ConstructFromLiteral);
>+ static NeverDestroyed<const AtomString> metadata("metadata", AtomString::ConstructFromLiteral);
> return metadata;
> }
> 
>-static const AtomicString& forcedKeyword()
>+static const AtomString& forcedKeyword()
> {
>- static NeverDestroyed<const AtomicString> forced("forced", AtomicString::ConstructFromLiteral);
>+ static NeverDestroyed<const AtomString> forced("forced", AtomString::ConstructFromLiteral);
> return forced;
> }
> 
>@@ -97,7 +97,7 @@ TextTrack* TextTrack::captionMenuAutomaticItem()
> return &automatic;
> }
> 
>-TextTrack::TextTrack(ScriptExecutionContext* context, TextTrackClient* client, const AtomicString& kind, const AtomicString& id, const AtomicString& label, const AtomicString& language, TextTrackType type)
>+TextTrack::TextTrack(ScriptExecutionContext* context, TextTrackClient* client, const AtomString& kind, const AtomString& id, const AtomString& label, const AtomString& language, TextTrackType type)
> : TrackBase(TrackBase::TextTrack, id, label, language)
> , ContextDestructionObserver(context)
> , m_client(client)
>@@ -134,7 +134,7 @@ bool TextTrack::enabled() const
> return m_mode != Mode::Disabled;
> }
> 
>-bool TextTrack::isValidKindKeyword(const AtomicString& value)
>+bool TextTrack::isValidKindKeyword(const AtomString& value)
> {
> if (value == subtitlesKeyword())
> return true;
>@@ -152,7 +152,7 @@ bool TextTrack::isValidKindKeyword(const AtomicString& value)
> return false;
> }
> 
>-const AtomicString& TextTrack::kindKeyword() const
>+const AtomString& TextTrack::kindKeyword() const
> {
> switch (m_kind) {
> case Kind::Captions:
>@@ -548,7 +548,7 @@ bool TextTrack::containsOnlyForcedSubtitles() const
> }
> 
> #if ENABLE(MEDIA_SOURCE)
>-void TextTrack::setLanguage(const AtomicString& language)
>+void TextTrack::setLanguage(const AtomString& language)
> {
> // 11.1 language, on setting:
> // 1. If the value being assigned to this attribute is not an empty string or a BCP 47 language
>diff --git a/Source/WebCore/html/track/TextTrack.h b/Source/WebCore/html/track/TextTrack.h
>index 346b737b960a87505de76e9b0e2080b39bc524e0..ed5b83aff92dfc1048fed154c12ad29701230e29 100644
>--- a/Source/WebCore/html/track/TextTrack.h
>+++ b/Source/WebCore/html/track/TextTrack.h
>@@ -54,7 +54,7 @@ public:
> class TextTrack : public TrackBase, public EventTargetWithInlineData, public ContextDestructionObserver {
> WTF_MAKE_ISO_ALLOCATED(TextTrack);
> public:
>- static Ref<TextTrack> create(ScriptExecutionContext* context, TextTrackClient* client, const AtomicString& kind, const AtomicString& id, const AtomicString& label, const AtomicString& language)
>+ static Ref<TextTrack> create(ScriptExecutionContext* context, TextTrackClient* client, const AtomString& kind, const AtomString& id, const AtomString& label, const AtomString& language)
> {
> return adoptRef(*new TextTrack(context, client, kind, id, label, language, AddTrack));
> }
>@@ -66,12 +66,12 @@ public:
> static TextTrack* captionMenuOffItem();
> static TextTrack* captionMenuAutomaticItem();
> 
>- static const AtomicString& subtitlesKeyword();
>- static bool isValidKindKeyword(const AtomicString&);
>+ static const AtomString& subtitlesKeyword();
>+ static bool isValidKindKeyword(const AtomString&);
> 
>- static const AtomicString& disabledKeyword();
>- static const AtomicString& hiddenKeyword();
>- static const AtomicString& showingKeyword();
>+ static const AtomString& disabledKeyword();
>+ static const AtomString& hiddenKeyword();
>+ static const AtomString& showingKeyword();
> 
> enum class Kind { Subtitles, Captions, Descriptions, Chapters, Metadata, Forced };
> Kind kind() const;
>@@ -80,10 +80,10 @@ public:
> Kind kindForBindings() const;
> void setKindForBindings(Kind);
> 
>- const AtomicString& kindKeyword() const;
>+ const AtomString& kindKeyword() const;
> void setKindKeywordIgnoringASCIICase(StringView);
> 
>- virtual AtomicString inBandMetadataTrackDispatchType() const { return emptyString(); }
>+ virtual AtomString inBandMetadataTrackDispatchType() const { return emptyString(); }
> 
> enum class Mode { Disabled, Hidden, Showing };
> Mode mode() const;
>@@ -135,7 +135,7 @@ public:
> void removeAllCues();
> 
> #if ENABLE(MEDIA_SOURCE)
>- void setLanguage(const AtomicString&) override;
>+ void setLanguage(const AtomString&) override;
> #endif
> 
> virtual bool isInband() const { return false; }
>@@ -148,7 +148,7 @@ public:
> const Optional<Vector<String>>& styleSheets() const { return m_styleSheets; }
> 
> protected:
>- TextTrack(ScriptExecutionContext*, TextTrackClient*, const AtomicString& kind, const AtomicString& id, const AtomicString& label, const AtomicString& language, TextTrackType);
>+ TextTrack(ScriptExecutionContext*, TextTrackClient*, const AtomString& kind, const AtomString& id, const AtomString& label, const AtomString& language, TextTrackType);
> 
> #if !RELEASE_LOG_DISABLED
> const char* logClassName() const override { return "TextTrack"; }
>diff --git a/Source/WebCore/html/track/TextTrackCue.cpp b/Source/WebCore/html/track/TextTrackCue.cpp
>index 636744bbc0dd3f03f9e4cd91b9ee5ff111ada311..8eac751cd7ca689819aa06c2e3aeef379b3e5409 100644
>--- a/Source/WebCore/html/track/TextTrackCue.cpp
>+++ b/Source/WebCore/html/track/TextTrackCue.cpp
>@@ -54,9 +54,9 @@ namespace WebCore {
> 
> WTF_MAKE_ISO_ALLOCATED_IMPL(TextTrackCue);
> 
>-const AtomicString& TextTrackCue::cueShadowPseudoId()
>+const AtomString& TextTrackCue::cueShadowPseudoId()
> {
>- static NeverDestroyed<const AtomicString> cue("cue", AtomicString::ConstructFromLiteral);
>+ static NeverDestroyed<const AtomString> cue("cue", AtomString::ConstructFromLiteral);
> return cue;
> }
> 
>diff --git a/Source/WebCore/html/track/TextTrackCue.h b/Source/WebCore/html/track/TextTrackCue.h
>index 2b4d42475c5c6b78e5fc6903724dfb4522bba2fa..aeddbd3d791fe8c252909a96b263fe2286b73f24 100644
>--- a/Source/WebCore/html/track/TextTrackCue.h
>+++ b/Source/WebCore/html/track/TextTrackCue.h
>@@ -44,7 +44,7 @@ class TextTrack;
> class TextTrackCue : public RefCounted<TextTrackCue>, public EventTargetWithInlineData {
> WTF_MAKE_ISO_ALLOCATED(TextTrackCue);
> public:
>- static const AtomicString& cueShadowPseudoId();
>+ static const AtomString& cueShadowPseudoId();
> 
> TextTrack* track() const;
> void setTrack(TextTrack*);
>diff --git a/Source/WebCore/html/track/TextTrackList.cpp b/Source/WebCore/html/track/TextTrackList.cpp
>index 99a9b32235b1a0ba8f428467237cbce88a45c3e9..b66fad9a59673afd6b0c627d33d383785c8a1555 100644
>--- a/Source/WebCore/html/track/TextTrackList.cpp
>+++ b/Source/WebCore/html/track/TextTrackList.cpp
>@@ -138,7 +138,7 @@ TextTrack* TextTrackList::item(unsigned index) const
> return nullptr;
> }
> 
>-TextTrack* TextTrackList::getTrackById(const AtomicString& id)
>+TextTrack* TextTrackList::getTrackById(const AtomString& id)
> {
> // 4.8.10.12.5 Text track API
> // The getTrackById(id) method must return the first TextTrack in the
>diff --git a/Source/WebCore/html/track/TextTrackList.h b/Source/WebCore/html/track/TextTrackList.h
>index 1f73927b84aa2bc34e544fbc5855c682e2e21f17..5d016d13d79640c0d499a68af52c73460e4a901e 100644
>--- a/Source/WebCore/html/track/TextTrackList.h
>+++ b/Source/WebCore/html/track/TextTrackList.h
>@@ -50,7 +50,7 @@ public:
> bool contains(TrackBase&) const override;
> 
> TextTrack* item(unsigned index) const;
>- TextTrack* getTrackById(const AtomicString&);
>+ TextTrack* getTrackById(const AtomString&);
> TextTrack* lastItem() const { return item(length() - 1); }
> 
> void append(Ref<TextTrack>&&);
>diff --git a/Source/WebCore/html/track/TrackBase.cpp b/Source/WebCore/html/track/TrackBase.cpp
>index ff5f41afc32373aabfe5b8986fe07911483529be..1819e8dde81f7e695eb9e7c98762966ddf652407 100644
>--- a/Source/WebCore/html/track/TrackBase.cpp
>+++ b/Source/WebCore/html/track/TrackBase.cpp
>@@ -52,7 +52,7 @@ static RefPtr<Logger>& nullLogger()
> }
> #endif
> 
>-TrackBase::TrackBase(Type type, const AtomicString& id, const AtomicString& label, const AtomicString& language)
>+TrackBase::TrackBase(Type type, const AtomString& id, const AtomString& label, const AtomString& language)
> : m_uniqueId(++s_uniqueId)
> , m_id(id)
> , m_label(label)
>@@ -141,7 +141,7 @@ static bool isValidBCP47LanguageTag(const String& languageTag)
> return true;
> }
> 
>-void TrackBase::setLanguage(const AtomicString& language)
>+void TrackBase::setLanguage(const AtomString& language)
> {
> if (!language.isEmpty() && !isValidBCP47LanguageTag(language)) {
> String message;
>@@ -162,7 +162,7 @@ void TrackBase::setLanguage(const AtomicString& language)
> m_language = language;
> }
> 
>-AtomicString TrackBase::validBCP47Language() const
>+AtomString TrackBase::validBCP47Language() const
> {
> return m_validBCP47Language;
> }
>@@ -174,17 +174,17 @@ WTFLogChannel& TrackBase::logChannel() const
> }
> #endif
> 
>-MediaTrackBase::MediaTrackBase(Type type, const AtomicString& id, const AtomicString& label, const AtomicString& language)
>+MediaTrackBase::MediaTrackBase(Type type, const AtomString& id, const AtomString& label, const AtomString& language)
> : TrackBase(type, id, label, language)
> {
> }
> 
>-void MediaTrackBase::setKind(const AtomicString& kind)
>+void MediaTrackBase::setKind(const AtomString& kind)
> {
> setKindInternal(kind);
> }
> 
>-void MediaTrackBase::setKindInternal(const AtomicString& kind)
>+void MediaTrackBase::setKindInternal(const AtomString& kind)
> {
> if (isValidKind(kind))
> m_kind = kind;
>diff --git a/Source/WebCore/html/track/TrackBase.h b/Source/WebCore/html/track/TrackBase.h
>index 0168c51934498de23249e9fc3caa73721bc50670..3225e552adacbd314d6a0f85f2961fc9bd556dfa 100644
>--- a/Source/WebCore/html/track/TrackBase.h
>+++ b/Source/WebCore/html/track/TrackBase.h
>@@ -28,7 +28,7 @@
> #if ENABLE(VIDEO_TRACK)
> 
> #include <wtf/LoggerHelper.h>
>-#include <wtf/text/AtomicString.h>
>+#include <wtf/text/AtomString.h>
> 
> namespace WebCore {
> 
>@@ -52,15 +52,15 @@ public:
> HTMLMediaElement* mediaElement() { return m_mediaElement; }
> virtual Element* element();
> 
>- virtual AtomicString id() const { return m_id; }
>- virtual void setId(const AtomicString& id) { m_id = id; }
>+ virtual AtomString id() const { return m_id; }
>+ virtual void setId(const AtomString& id) { m_id = id; }
> 
>- AtomicString label() const { return m_label; }
>- void setLabel(const AtomicString& label) { m_label = label; }
>+ AtomString label() const { return m_label; }
>+ void setLabel(const AtomString& label) { m_label = label; }
> 
>- AtomicString validBCP47Language() const;
>- AtomicString language() const { return m_language; }
>- virtual void setLanguage(const AtomicString&);
>+ AtomString validBCP47Language() const;
>+ AtomString language() const { return m_language; }
>+ virtual void setLanguage(const AtomString&);
> 
> virtual void clearClient() = 0;
> 
>@@ -80,7 +80,7 @@ public:
> #endif
> 
> protected:
>- TrackBase(Type, const AtomicString& id, const AtomicString& label, const AtomicString& language);
>+ TrackBase(Type, const AtomString& id, const AtomString& label, const AtomString& language);
> 
> HTMLMediaElement* m_mediaElement { nullptr };
> 
>@@ -91,10 +91,10 @@ protected:
> private:
> Type m_type;
> int m_uniqueId;
>- AtomicString m_id;
>- AtomicString m_label;
>- AtomicString m_language;
>- AtomicString m_validBCP47Language;
>+ AtomString m_id;
>+ AtomString m_label;
>+ AtomString m_language;
>+ AtomString m_validBCP47Language;
> #if !RELEASE_LOG_DISABLED
> RefPtr<const Logger> m_logger;
> const void* m_logIdentifier;
>@@ -103,18 +103,18 @@ private:
> 
> class MediaTrackBase : public TrackBase {
> public:
>- const AtomicString& kind() const { return m_kind; }
>- virtual void setKind(const AtomicString&);
>+ const AtomString& kind() const { return m_kind; }
>+ virtual void setKind(const AtomString&);
> 
> protected:
>- MediaTrackBase(Type, const AtomicString& id, const AtomicString& label, const AtomicString& language);
>+ MediaTrackBase(Type, const AtomString& id, const AtomString& label, const AtomString& language);
> 
>- void setKindInternal(const AtomicString&);
>+ void setKindInternal(const AtomString&);
> 
> private:
>- virtual bool isValidKind(const AtomicString&) const = 0;
>+ virtual bool isValidKind(const AtomString&) const = 0;
> 
>- AtomicString m_kind;
>+ AtomString m_kind;
> };
> 
> } // namespace WebCore
>diff --git a/Source/WebCore/html/track/TrackEvent.cpp b/Source/WebCore/html/track/TrackEvent.cpp
>index b9a90da3fd6fe124b5e4084122a8e0365abc1561..850024aa2060d877d995aa7c0ab21b6c041b0d57 100644
>--- a/Source/WebCore/html/track/TrackEvent.cpp
>+++ b/Source/WebCore/html/track/TrackEvent.cpp
>@@ -48,13 +48,13 @@ static inline Optional<TrackEvent::TrackEventTrack> convertToTrackEventTrack(Ref
> return WTF::nullopt;
> }
> 
>-TrackEvent::TrackEvent(const AtomicString& type, CanBubble canBubble, IsCancelable cancelable, Ref<TrackBase>&& track)
>+TrackEvent::TrackEvent(const AtomString& type, CanBubble canBubble, IsCancelable cancelable, Ref<TrackBase>&& track)
> : Event(type, canBubble, cancelable)
> , m_track(convertToTrackEventTrack(WTFMove(track)))
> {
> }
> 
>-TrackEvent::TrackEvent(const AtomicString& type, Init&& initializer, IsTrusted isTrusted)
>+TrackEvent::TrackEvent(const AtomString& type, Init&& initializer, IsTrusted isTrusted)
> : Event(type, initializer, isTrusted)
> , m_track(WTFMove(initializer.track))
> {
>diff --git a/Source/WebCore/html/track/TrackEvent.h b/Source/WebCore/html/track/TrackEvent.h
>index a8ec68c4d00c1df92d12d9973ddcdfb480a1d1cc..b647982ce499e2bcd019a1d4a5ca86ab16541d97 100644
>--- a/Source/WebCore/html/track/TrackEvent.h
>+++ b/Source/WebCore/html/track/TrackEvent.h
>@@ -38,7 +38,7 @@ class TrackEvent final : public Event {
> public:
> virtual ~TrackEvent();
> 
>- static Ref<TrackEvent> create(const AtomicString& type, CanBubble canBubble, IsCancelable cancelable, Ref<TrackBase>&& track)
>+ static Ref<TrackEvent> create(const AtomString& type, CanBubble canBubble, IsCancelable cancelable, Ref<TrackBase>&& track)
> {
> return adoptRef(*new TrackEvent(type, canBubble, cancelable, WTFMove(track)));
> }
>@@ -49,7 +49,7 @@ public:
> Optional<TrackEventTrack> track;
> };
> 
>- static Ref<TrackEvent> create(const AtomicString& type, Init&& initializer, IsTrusted isTrusted = IsTrusted::No)
>+ static Ref<TrackEvent> create(const AtomString& type, Init&& initializer, IsTrusted isTrusted = IsTrusted::No)
> {
> return adoptRef(*new TrackEvent(type, WTFMove(initializer), isTrusted));
> }
>@@ -57,8 +57,8 @@ public:
> Optional<TrackEventTrack> track() const { return m_track; }
> 
> private:
>- TrackEvent(const AtomicString& type, CanBubble, IsCancelable, Ref<TrackBase>&&);
>- TrackEvent(const AtomicString& type, Init&& initializer, IsTrusted);
>+ TrackEvent(const AtomString& type, CanBubble, IsCancelable, Ref<TrackBase>&&);
>+ TrackEvent(const AtomString& type, Init&& initializer, IsTrusted);
> 
> EventInterface eventInterface() const override;
> 
>diff --git a/Source/WebCore/html/track/TrackListBase.cpp b/Source/WebCore/html/track/TrackListBase.cpp
>index 00522658bdbc1e94a581814a5db03ecc4d8b8b07..6d3118be7429398c07aae0f959fecdc1267ffd03 100644
>--- a/Source/WebCore/html/track/TrackListBase.cpp
>+++ b/Source/WebCore/html/track/TrackListBase.cpp
>@@ -96,7 +96,7 @@ bool TrackListBase::contains(TrackBase& track) const
> return m_inbandTracks.find(&track) != notFound;
> }
> 
>-void TrackListBase::scheduleTrackEvent(const AtomicString& eventName, Ref<TrackBase>&& track)
>+void TrackListBase::scheduleTrackEvent(const AtomString& eventName, Ref<TrackBase>&& track)
> {
> m_asyncEventQueue.enqueueEvent(TrackEvent::create(eventName, Event::CanBubble::No, Event::IsCancelable::No, WTFMove(track)));
> }
>diff --git a/Source/WebCore/html/track/TrackListBase.h b/Source/WebCore/html/track/TrackListBase.h
>index ed43496e1eaa314a230182ac76c157cfefd9609b..3cde88dcc4afd5407b08c68ad9c2f1936858a230 100644
>--- a/Source/WebCore/html/track/TrackListBase.h
>+++ b/Source/WebCore/html/track/TrackListBase.h
>@@ -73,7 +73,7 @@ protected:
> Vector<RefPtr<TrackBase>> m_inbandTracks;
> 
> private:
>- void scheduleTrackEvent(const AtomicString& eventName, Ref<TrackBase>&&);
>+ void scheduleTrackEvent(const AtomString& eventName, Ref<TrackBase>&&);
> 
> bool canSuspendForDocumentSuspension() const final;
> void suspend(ReasonForSuspension) final;
>diff --git a/Source/WebCore/html/track/VTTCue.cpp b/Source/WebCore/html/track/VTTCue.cpp
>index 10d5cc0625a906ee58a5192582261b0ce11f1297..e8e2182ff984828e0e593757eac94c31964c70a7 100644
>--- a/Source/WebCore/html/track/VTTCue.cpp
>+++ b/Source/WebCore/html/track/VTTCue.cpp
>@@ -242,9 +242,9 @@ void VTTCueBox::applyCSSProperties(const IntSize& videoSize)
> cue->element().setInlineStyleProperty(CSSPropertyOverflow, CSSValueVisible);
> }
> 
>-const AtomicString& VTTCueBox::vttCueBoxShadowPseudoId()
>+const AtomString& VTTCueBox::vttCueBoxShadowPseudoId()
> {
>- static NeverDestroyed<const AtomicString> trackDisplayBoxShadowPseudoId("-webkit-media-text-track-display", AtomicString::ConstructFromLiteral);
>+ static NeverDestroyed<const AtomString> trackDisplayBoxShadowPseudoId("-webkit-media-text-track-display", AtomString::ConstructFromLiteral);
> return trackDisplayBoxShadowPseudoId;
> }
> 
>@@ -255,9 +255,9 @@ RenderPtr<RenderElement> VTTCueBox::createElementRenderer(RenderStyle&& style, c
> 
> // ----------------------------
> 
>-const AtomicString& VTTCue::cueBackdropShadowPseudoId()
>+const AtomString& VTTCue::cueBackdropShadowPseudoId()
> {
>- static NeverDestroyed<const AtomicString> cueBackdropShadowPseudoId("-webkit-media-text-track-display-backdrop", AtomicString::ConstructFromLiteral);
>+ static NeverDestroyed<const AtomString> cueBackdropShadowPseudoId("-webkit-media-text-track-display-backdrop", AtomString::ConstructFromLiteral);
> return cueBackdropShadowPseudoId;
> }
> 
>diff --git a/Source/WebCore/html/track/VTTCue.h b/Source/WebCore/html/track/VTTCue.h
>index 2e374959a52ba5ea7bb9a2192ba83e7901b8f15e..1bf7f553a26804a8f85b0b255983ec2337322e71 100644
>--- a/Source/WebCore/html/track/VTTCue.h
>+++ b/Source/WebCore/html/track/VTTCue.h
>@@ -57,7 +57,7 @@ public:
> VTTCue* getCue() const;
> virtual void applyCSSProperties(const IntSize& videoSize);
> 
>- static const AtomicString& vttCueBoxShadowPseudoId();
>+ static const AtomString& vttCueBoxShadowPseudoId();
> void setFontSizeFromCaptionUserPrefs(int fontSize) { m_fontSizeFromCaptionUserPrefs = fontSize; }
> 
> protected:
>@@ -89,7 +89,7 @@ public:
> 
> static Ref<VTTCue> create(ScriptExecutionContext&, const WebVTTCueData&);
> 
>- static const AtomicString& cueBackdropShadowPseudoId();
>+ static const AtomString& cueBackdropShadowPseudoId();
> 
> virtual ~VTTCue();
> 
>diff --git a/Source/WebCore/html/track/VTTRegion.cpp b/Source/WebCore/html/track/VTTRegion.cpp
>index 885bf79a1c88d9f7527b73c99c4bb11bcad68c5a..760724178296df026f40bcda827f78d6ab753baa 100644
>--- a/Source/WebCore/html/track/VTTRegion.cpp
>+++ b/Source/WebCore/html/track/VTTRegion.cpp
>@@ -124,18 +124,18 @@ ExceptionOr<void> VTTRegion::setViewportAnchorY(double value)
> return { };
> }
> 
>-static const AtomicString& upKeyword()
>+static const AtomString& upKeyword()
> {
>- static NeverDestroyed<const AtomicString> upKeyword("up", AtomicString::ConstructFromLiteral);
>+ static NeverDestroyed<const AtomString> upKeyword("up", AtomString::ConstructFromLiteral);
> return upKeyword;
> }
> 
>-const AtomicString& VTTRegion::scroll() const
>+const AtomString& VTTRegion::scroll() const
> {
> return m_scroll ? upKeyword() : emptyAtom();
> }
> 
>-ExceptionOr<void> VTTRegion::setScroll(const AtomicString& value)
>+ExceptionOr<void> VTTRegion::setScroll(const AtomString& value)
> {
> if (value.isEmpty()) {
> m_scroll = false;
>@@ -260,23 +260,23 @@ void VTTRegion::parseSettingValue(RegionSetting setting, VTTScanner& input)
> input.skipRun(valueRun);
> }
> 
>-const AtomicString& VTTRegion::textTrackCueContainerScrollingClass()
>+const AtomString& VTTRegion::textTrackCueContainerScrollingClass()
> {
>- static NeverDestroyed<const AtomicString> trackRegionCueContainerScrollingClass("scrolling", AtomicString::ConstructFromLiteral);
>+ static NeverDestroyed<const AtomString> trackRegionCueContainerScrollingClass("scrolling", AtomString::ConstructFromLiteral);
> 
> return trackRegionCueContainerScrollingClass;
> }
> 
>-const AtomicString& VTTRegion::textTrackCueContainerShadowPseudoId()
>+const AtomString& VTTRegion::textTrackCueContainerShadowPseudoId()
> {
>- static NeverDestroyed<const AtomicString> trackRegionCueContainerPseudoId("-webkit-media-text-track-region-container", AtomicString::ConstructFromLiteral);
>+ static NeverDestroyed<const AtomString> trackRegionCueContainerPseudoId("-webkit-media-text-track-region-container", AtomString::ConstructFromLiteral);
> 
> return trackRegionCueContainerPseudoId;
> }
> 
>-const AtomicString& VTTRegion::textTrackRegionShadowPseudoId()
>+const AtomString& VTTRegion::textTrackRegionShadowPseudoId()
> {
>- static NeverDestroyed<const AtomicString> trackRegionShadowPseudoId("-webkit-media-text-track-region", AtomicString::ConstructFromLiteral);
>+ static NeverDestroyed<const AtomString> trackRegionShadowPseudoId("-webkit-media-text-track-region", AtomString::ConstructFromLiteral);
> 
> return trackRegionShadowPseudoId;
> }
>diff --git a/Source/WebCore/html/track/VTTRegion.h b/Source/WebCore/html/track/VTTRegion.h
>index 77a7b00d32252412ede2111263fa6170937d5878..6fcc4f33913e264b84c2bf6bc4ff6bf2cc732ecb 100644
>--- a/Source/WebCore/html/track/VTTRegion.h
>+++ b/Source/WebCore/html/track/VTTRegion.h
>@@ -76,8 +76,8 @@ public:
> double viewportAnchorY() const { return m_viewportAnchor.y(); }
> ExceptionOr<void> setViewportAnchorY(double);
> 
>- const AtomicString& scroll() const;
>- ExceptionOr<void> setScroll(const AtomicString&);
>+ const AtomString& scroll() const;
>+ ExceptionOr<void> setScroll(const AtomString&);
> 
> void updateParametersFromRegion(const VTTRegion&);
> 
>@@ -116,9 +116,9 @@ private:
> 
> void parseSettingValue(RegionSetting, VTTScanner&);
> 
>- static const AtomicString& textTrackCueContainerShadowPseudoId();
>- static const AtomicString& textTrackCueContainerScrollingClass();
>- static const AtomicString& textTrackRegionShadowPseudoId();
>+ static const AtomString& textTrackCueContainerShadowPseudoId();
>+ static const AtomString& textTrackCueContainerScrollingClass();
>+ static const AtomString& textTrackRegionShadowPseudoId();
> 
> String m_id;
> String m_settings;
>diff --git a/Source/WebCore/html/track/VideoTrack.cpp b/Source/WebCore/html/track/VideoTrack.cpp
>index 75c97e6ce90b628dc23647d22a6ffd9fa98512b3..511eddb759f759519d86f60f2c24616c46c7a24b 100644
>--- a/Source/WebCore/html/track/VideoTrack.cpp
>+++ b/Source/WebCore/html/track/VideoTrack.cpp
>@@ -44,39 +44,39 @@
> 
> namespace WebCore {
> 
>-const AtomicString& VideoTrack::alternativeKeyword()
>+const AtomString& VideoTrack::alternativeKeyword()
> {
>- static NeverDestroyed<const AtomicString> alternative("alternative", AtomicString::ConstructFromLiteral);
>+ static NeverDestroyed<const AtomString> alternative("alternative", AtomString::ConstructFromLiteral);
> return alternative;
> }
> 
>-const AtomicString& VideoTrack::captionsKeyword()
>+const AtomString& VideoTrack::captionsKeyword()
> {
>- static NeverDestroyed<const AtomicString> captions("captions", AtomicString::ConstructFromLiteral);
>+ static NeverDestroyed<const AtomString> captions("captions", AtomString::ConstructFromLiteral);
> return captions;
> }
> 
>-const AtomicString& VideoTrack::mainKeyword()
>+const AtomString& VideoTrack::mainKeyword()
> {
>- static NeverDestroyed<const AtomicString> captions("main", AtomicString::ConstructFromLiteral);
>+ static NeverDestroyed<const AtomString> captions("main", AtomString::ConstructFromLiteral);
> return captions;
> }
> 
>-const AtomicString& VideoTrack::signKeyword()
>+const AtomString& VideoTrack::signKeyword()
> {
>- static NeverDestroyed<const AtomicString> sign("sign", AtomicString::ConstructFromLiteral);
>+ static NeverDestroyed<const AtomString> sign("sign", AtomString::ConstructFromLiteral);
> return sign;
> }
> 
>-const AtomicString& VideoTrack::subtitlesKeyword()
>+const AtomString& VideoTrack::subtitlesKeyword()
> {
>- static NeverDestroyed<const AtomicString> subtitles("subtitles", AtomicString::ConstructFromLiteral);
>+ static NeverDestroyed<const AtomString> subtitles("subtitles", AtomString::ConstructFromLiteral);
> return subtitles;
> }
> 
>-const AtomicString& VideoTrack::commentaryKeyword()
>+const AtomString& VideoTrack::commentaryKeyword()
> {
>- static NeverDestroyed<const AtomicString> commentary("commentary", AtomicString::ConstructFromLiteral);
>+ static NeverDestroyed<const AtomString> commentary("commentary", AtomString::ConstructFromLiteral);
> return commentary;
> }
> 
>@@ -114,7 +114,7 @@ void VideoTrack::setPrivate(VideoTrackPrivate& trackPrivate)
> updateKindFromPrivate();
> }
> 
>-bool VideoTrack::isValidKind(const AtomicString& value) const
>+bool VideoTrack::isValidKind(const AtomString& value) const
> {
> return value == alternativeKeyword()
> || value == commentaryKeyword()
>@@ -146,17 +146,17 @@ void VideoTrack::selectedChanged(bool selected)
> setSelected(selected);
> }
> 
>-void VideoTrack::idChanged(const AtomicString& id)
>+void VideoTrack::idChanged(const AtomString& id)
> {
> setId(id);
> }
> 
>-void VideoTrack::labelChanged(const AtomicString& label)
>+void VideoTrack::labelChanged(const AtomString& label)
> {
> setLabel(label);
> }
> 
>-void VideoTrack::languageChanged(const AtomicString& language)
>+void VideoTrack::languageChanged(const AtomString& language)
> {
> setLanguage(language);
> }
>@@ -171,7 +171,7 @@ void VideoTrack::willRemove()
> 
> #if ENABLE(MEDIA_SOURCE)
> 
>-void VideoTrack::setKind(const AtomicString& kind)
>+void VideoTrack::setKind(const AtomString& kind)
> {
> // 10.1 kind, on setting:
> // 1. If the value being assigned to this attribute does not match one of the video track kinds,
>@@ -192,7 +192,7 @@ void VideoTrack::setKind(const AtomicString& kind)
> mediaElement()->ensureVideoTracks().scheduleChangeEvent();
> }
> 
>-void VideoTrack::setLanguage(const AtomicString& language)
>+void VideoTrack::setLanguage(const AtomString& language)
> {
> // 10.1 language, on setting:
> // 1. If the value being assigned to this attribute is not an empty string or a BCP 47 language
>diff --git a/Source/WebCore/html/track/VideoTrack.h b/Source/WebCore/html/track/VideoTrack.h
>index ebab024a4ca912656b9ab5aa77ea0af0380bf378..5eff43b6b89a3aa4e3de9c7dd5827f6fb59b389d 100644
>--- a/Source/WebCore/html/track/VideoTrack.h
>+++ b/Source/WebCore/html/track/VideoTrack.h
>@@ -50,12 +50,12 @@ public:
> }
> virtual ~VideoTrack();
> 
>- static const AtomicString& alternativeKeyword();
>- static const AtomicString& captionsKeyword();
>- static const AtomicString& mainKeyword();
>- static const AtomicString& signKeyword();
>- static const AtomicString& subtitlesKeyword();
>- static const AtomicString& commentaryKeyword();
>+ static const AtomString& alternativeKeyword();
>+ static const AtomString& captionsKeyword();
>+ static const AtomString& mainKeyword();
>+ static const AtomString& signKeyword();
>+ static const AtomString& subtitlesKeyword();
>+ static const AtomString& commentaryKeyword();
> 
> bool selected() const { return m_selected; }
> virtual void setSelected(const bool);
>@@ -66,8 +66,8 @@ public:
> size_t inbandTrackIndex();
> 
> #if ENABLE(MEDIA_SOURCE)
>- void setKind(const AtomicString&) final;
>- void setLanguage(const AtomicString&) final;
>+ void setKind(const AtomString&) final;
>+ void setLanguage(const AtomString&) final;
> #endif
> 
> const MediaDescription& description() const;
>@@ -78,15 +78,15 @@ public:
> private:
> VideoTrack(VideoTrackClient&, VideoTrackPrivate&);
> 
>- bool isValidKind(const AtomicString&) const final;
>+ bool isValidKind(const AtomString&) const final;
> 
> // VideoTrackPrivateClient
> void selectedChanged(bool) final;
> 
> // TrackPrivateBaseClient
>- void idChanged(const AtomicString&) final;
>- void labelChanged(const AtomicString&) final;
>- void languageChanged(const AtomicString&) final;
>+ void idChanged(const AtomString&) final;
>+ void labelChanged(const AtomString&) final;
>+ void languageChanged(const AtomString&) final;
> void willRemove() final;
> 
> bool enabled() const final { return selected(); }
>diff --git a/Source/WebCore/html/track/VideoTrackList.cpp b/Source/WebCore/html/track/VideoTrackList.cpp
>index 4d8b32553f7ae66b7bcf3d72c4e1bed79236125c..78813b3cffc53adb6be67be1fecb43c627d18991 100644
>--- a/Source/WebCore/html/track/VideoTrackList.cpp
>+++ b/Source/WebCore/html/track/VideoTrackList.cpp
>@@ -65,7 +65,7 @@ VideoTrack* VideoTrackList::item(unsigned index) const
> return nullptr;
> }
> 
>-VideoTrack* VideoTrackList::getTrackById(const AtomicString& id) const
>+VideoTrack* VideoTrackList::getTrackById(const AtomString& id) const
> {
> for (auto& inbandTracks : m_inbandTracks) {
> auto& track = downcast<VideoTrack>(*inbandTracks);
>diff --git a/Source/WebCore/html/track/VideoTrackList.h b/Source/WebCore/html/track/VideoTrackList.h
>index cb6a9cf0820036f90ef9a534e1f8a679cb486f1a..467c6bd24529cba412b307ced079478bf724797f 100644
>--- a/Source/WebCore/html/track/VideoTrackList.h
>+++ b/Source/WebCore/html/track/VideoTrackList.h
>@@ -41,7 +41,7 @@ public:
> }
> virtual ~VideoTrackList();
> 
>- VideoTrack* getTrackById(const AtomicString&) const;
>+ VideoTrack* getTrackById(const AtomString&) const;
> int selectedIndex() const;
> 
> VideoTrack* item(unsigned) const;
>diff --git a/Source/WebCore/html/track/WebVTTElement.h b/Source/WebCore/html/track/WebVTTElement.h
>index 64135e2ac1541c37260ec06d2ec5df16febec9f4..28471d6ad72c8c96402576ba75164b21d5feb047 100644
>--- a/Source/WebCore/html/track/WebVTTElement.h
>+++ b/Source/WebCore/html/track/WebVTTElement.h
>@@ -58,8 +58,8 @@ public:
> bool isPastNode() const { return m_isPastNode; }
> void setIsPastNode(bool value) { m_isPastNode = value; }
> 
>- AtomicString language() const { return m_language; }
>- void setLanguage(const AtomicString& value) { m_language = value; }
>+ AtomString language() const { return m_language; }
>+ void setLanguage(const AtomString& value) { m_language = value; }
> 
> static const QualifiedName& voiceAttributeName()
> {
>@@ -81,7 +81,7 @@ private:
> unsigned m_isPastNode : 1;
> unsigned m_webVTTNodeType : 4;
> 
>- AtomicString m_language;
>+ AtomString m_language;
> };
> 
> } // namespace WebCore
>diff --git a/Source/WebCore/html/track/WebVTTParser.cpp b/Source/WebCore/html/track/WebVTTParser.cpp
>index 19762a160e762ff29798bd5b79a8f7fe5f638672..c2f880615d9d0dbaeb0f533ee19b23d0d125ea7b 100644
>--- a/Source/WebCore/html/track/WebVTTParser.cpp
>+++ b/Source/WebCore/html/track/WebVTTParser.cpp
>@@ -501,7 +501,7 @@ private:
> 
> WebVTTToken m_token;
> RefPtr<ContainerNode> m_currentNode;
>- Vector<AtomicString> m_languageStack;
>+ Vector<AtomString> m_languageStack;
> Document& m_document;
> };
> 
>diff --git a/Source/WebCore/html/track/WebVTTParser.h b/Source/WebCore/html/track/WebVTTParser.h
>index cfc5717fd2bd529ea54dc8c8a9f8dc652ba9d45a..d1a441d114d72289938326d924f752c2eacb24b7 100644
>--- a/Source/WebCore/html/track/WebVTTParser.h
>+++ b/Source/WebCore/html/track/WebVTTParser.h
>@@ -113,7 +113,7 @@ public:
> 
> WebVTTParser(WebVTTParserClient*, ScriptExecutionContext*);
> 
>- static inline bool isRecognizedTag(const AtomicString& tagName)
>+ static inline bool isRecognizedTag(const AtomString& tagName)
> {
> return tagName == iTag
> || tagName == bTag
>diff --git a/Source/WebCore/html/track/WebVTTToken.h b/Source/WebCore/html/track/WebVTTToken.h
>index 9600945ea61b7df9c07f6ccb13fa16ce58fc5492..73eacbabbc4b26606f8736679fbb5e25ae2574d5 100644
>--- a/Source/WebCore/html/track/WebVTTToken.h
>+++ b/Source/WebCore/html/track/WebVTTToken.h
>@@ -58,7 +58,7 @@ public:
> return WebVTTToken(Type::Character, characterData);
> }
> 
>- static WebVTTToken StartTag(const String& tagName, const AtomicString& classes = emptyAtom(), const AtomicString& annotation = emptyAtom())
>+ static WebVTTToken StartTag(const String& tagName, const AtomString& classes = emptyAtom(), const AtomString& annotation = emptyAtom())
> {
> WebVTTToken token(Type::StartTag, tagName);
> token.m_classes = classes;
>@@ -79,8 +79,8 @@ public:
> Type::Type type() const { return m_type; }
> const String& name() const { return m_data; }
> const String& characters() const { return m_data; }
>- const AtomicString& classes() const { return m_classes; }
>- const AtomicString& annotation() const { return m_annotation; }
>+ const AtomString& classes() const { return m_classes; }
>+ const AtomString& annotation() const { return m_annotation; }
> 
> private:
> WebVTTToken(Type::Type type, const String& data)
>@@ -89,8 +89,8 @@ private:
> 
> Type::Type m_type;
> String m_data;
>- AtomicString m_annotation;
>- AtomicString m_classes;
>+ AtomString m_annotation;
>+ AtomString m_classes;
> };
> 
> } // namespace WebCore
>diff --git a/Source/WebCore/html/track/WebVTTTokenizer.cpp b/Source/WebCore/html/track/WebVTTTokenizer.cpp
>index 024c04a096c8a331702751e7ed1f3c3c77d801ce..f200cbabe947136926bea68c05a1d2432a1086fb 100644
>--- a/Source/WebCore/html/track/WebVTTTokenizer.cpp
>+++ b/Source/WebCore/html/track/WebVTTTokenizer.cpp
>@@ -202,7 +202,7 @@ StartTagClassState:
> } else if (character == '>' || character == kEndOfFileMarker) {
> addNewClass(classes, buffer);
> buffer.clear();
>- return advanceAndEmitToken(m_input, token, WebVTTToken::StartTag(result.toString(), classes.toAtomicString()));
>+ return advanceAndEmitToken(m_input, token, WebVTTToken::StartTag(result.toString(), classes.toAtomString()));
> } else {
> buffer.append(character);
> WEBVTT_ADVANCE_TO(StartTagClassState);
>@@ -210,7 +210,7 @@ StartTagClassState:
> 
> StartTagAnnotationState:
> if (character == '>' || character == kEndOfFileMarker)
>- return advanceAndEmitToken(m_input, token, WebVTTToken::StartTag(result.toString(), classes.toAtomicString(), buffer.toAtomicString()));
>+ return advanceAndEmitToken(m_input, token, WebVTTToken::StartTag(result.toString(), classes.toAtomString(), buffer.toAtomString()));
> buffer.append(character);
> WEBVTT_ADVANCE_TO(StartTagAnnotationState);
> 
>diff --git a/Source/WebCore/inspector/DOMEditor.cpp b/Source/WebCore/inspector/DOMEditor.cpp
>index 451668041c039812c76705dc3b21c0c551a6b046..6c31e498e434d300b0f1c6eab84346776cf0a2fc 100644
>--- a/Source/WebCore/inspector/DOMEditor.cpp
>+++ b/Source/WebCore/inspector/DOMEditor.cpp
>@@ -159,7 +159,7 @@ private:
> class DOMEditor::SetAttributeAction final : public InspectorHistory::Action {
> WTF_MAKE_NONCOPYABLE(SetAttributeAction);
> public:
>- SetAttributeAction(Element& element, const AtomicString& name, const AtomicString& value)
>+ SetAttributeAction(Element& element, const AtomString& name, const AtomString& value)
> : InspectorHistory::Action()
> , m_element(element)
> , m_name(name)
>@@ -189,9 +189,9 @@ private:
> }
> 
> Ref<Element> m_element;
>- AtomicString m_name;
>- AtomicString m_value;
>- AtomicString m_oldValue;
>+ AtomString m_name;
>+ AtomString m_value;
>+ AtomString m_oldValue;
> };
> 
> class DOMEditor::SetOuterHTMLAction final : public InspectorHistory::Action {
>diff --git a/Source/WebCore/inspector/InspectorAuditDOMObject.cpp b/Source/WebCore/inspector/InspectorAuditDOMObject.cpp
>index 923287d3d2fc14a7c64590636ff4f1305574eb42..f1dfa40b99dace4643e1a825292867717f68eda4 100644
>--- a/Source/WebCore/inspector/InspectorAuditDOMObject.cpp
>+++ b/Source/WebCore/inspector/InspectorAuditDOMObject.cpp
>@@ -28,7 +28,7 @@
> #include "InspectorAuditDOMObject.h"
> 
> #include "Node.h"
>-#include <wtf/text/AtomicString.h>
>+#include <wtf/text/AtomString.h>
> #include <wtf/text/WTFString.h>
> 
> namespace WebCore {
>@@ -49,13 +49,13 @@ ExceptionOr<bool> InspectorAuditDOMObject::hasEventListeners(Node& node, const S
> ERROR_IF_NO_ACTIVE_AUDIT();
> 
> if (EventTargetData* eventTargetData = node.eventTargetData()) {
>- Vector<AtomicString> eventTypes;
>+ Vector<AtomString> eventTypes;
> if (type.isNull())
> eventTypes = eventTargetData->eventListenerMap.eventTypes();
> else
> eventTypes.append(type);
> 
>- for (AtomicString& type : eventTypes) {
>+ for (AtomString& type : eventTypes) {
> for (const RefPtr<RegisteredEventListener>& listener : node.eventListeners(type)) {
> if (listener->callback().type() == EventListener::JSEventListenerType)
> return true;
>diff --git a/Source/WebCore/inspector/InspectorInstrumentation.cpp b/Source/WebCore/inspector/InspectorInstrumentation.cpp
>index fb75d19c8b6981c6c10100bddd63f2a01b9c515b..9b1d2fcf3dbc21f2e1657a946697ac96716e2c28 100644
>--- a/Source/WebCore/inspector/InspectorInstrumentation.cpp
>+++ b/Source/WebCore/inspector/InspectorInstrumentation.cpp
>@@ -169,7 +169,7 @@ void InspectorInstrumentation::didRemoveDOMNodeImpl(InstrumentingAgents& instrum
> domAgent->didRemoveDOMNode(node);
> }
> 
>-void InspectorInstrumentation::willModifyDOMAttrImpl(InstrumentingAgents& instrumentingAgents, Element& element, const AtomicString& oldValue, const AtomicString& newValue)
>+void InspectorInstrumentation::willModifyDOMAttrImpl(InstrumentingAgents& instrumentingAgents, Element& element, const AtomString& oldValue, const AtomString& newValue)
> {
> if (InspectorDOMDebuggerAgent* domDebuggerAgent = instrumentingAgents.inspectorDOMDebuggerAgent())
> domDebuggerAgent->willModifyDOMAttr(element);
>@@ -177,13 +177,13 @@ void InspectorInstrumentation::willModifyDOMAttrImpl(InstrumentingAgents& instru
> domAgent->willModifyDOMAttr(element, oldValue, newValue);
> }
> 
>-void InspectorInstrumentation::didModifyDOMAttrImpl(InstrumentingAgents& instrumentingAgents, Element& element, const AtomicString& name, const AtomicString& value)
>+void InspectorInstrumentation::didModifyDOMAttrImpl(InstrumentingAgents& instrumentingAgents, Element& element, const AtomString& name, const AtomString& value)
> {
> if (InspectorDOMAgent* domAgent = instrumentingAgents.inspectorDOMAgent())
> domAgent->didModifyDOMAttr(element, name, value);
> }
> 
>-void InspectorInstrumentation::didRemoveDOMAttrImpl(InstrumentingAgents& instrumentingAgents, Element& element, const AtomicString& name)
>+void InspectorInstrumentation::didRemoveDOMAttrImpl(InstrumentingAgents& instrumentingAgents, Element& element, const AtomString& name)
> {
> if (InspectorDOMAgent* domAgent = instrumentingAgents.inspectorDOMAgent())
> domAgent->didRemoveDOMAttr(element, name);
>@@ -328,7 +328,7 @@ void InspectorInstrumentation::didRemoveTimerImpl(InstrumentingAgents& instrumen
> timelineAgent->didRemoveTimer(timerId, frameForScriptExecutionContext(context));
> }
> 
>-void InspectorInstrumentation::didAddEventListenerImpl(InstrumentingAgents& instrumentingAgents, EventTarget& target, const AtomicString& eventType, EventListener& listener, bool capture)
>+void InspectorInstrumentation::didAddEventListenerImpl(InstrumentingAgents& instrumentingAgents, EventTarget& target, const AtomString& eventType, EventListener& listener, bool capture)
> {
> if (PageDebuggerAgent* pageDebuggerAgent = instrumentingAgents.pageDebuggerAgent())
> pageDebuggerAgent->didAddEventListener(target, eventType, listener, capture);
>@@ -336,7 +336,7 @@ void InspectorInstrumentation::didAddEventListenerImpl(InstrumentingAgents& inst
> domAgent->didAddEventListener(target);
> }
> 
>-void InspectorInstrumentation::willRemoveEventListenerImpl(InstrumentingAgents& instrumentingAgents, EventTarget& target, const AtomicString& eventType, EventListener& listener, bool capture)
>+void InspectorInstrumentation::willRemoveEventListenerImpl(InstrumentingAgents& instrumentingAgents, EventTarget& target, const AtomString& eventType, EventListener& listener, bool capture)
> {
> if (PageDebuggerAgent* pageDebuggerAgent = instrumentingAgents.pageDebuggerAgent())
> pageDebuggerAgent->willRemoveEventListener(target, eventType, listener, capture);
>@@ -344,7 +344,7 @@ void InspectorInstrumentation::willRemoveEventListenerImpl(InstrumentingAgents&
> domAgent->willRemoveEventListener(target, eventType, listener, capture);
> }
> 
>-bool InspectorInstrumentation::isEventListenerDisabledImpl(InstrumentingAgents& instrumentingAgents, EventTarget& target, const AtomicString& eventType, EventListener& listener, bool capture)
>+bool InspectorInstrumentation::isEventListenerDisabledImpl(InstrumentingAgents& instrumentingAgents, EventTarget& target, const AtomString& eventType, EventListener& listener, bool capture)
> {
> if (InspectorDOMAgent* domAgent = instrumentingAgents.inspectorDOMAgent())
> return domAgent->isEventListenerDisabled(target, eventType, listener, capture);
>diff --git a/Source/WebCore/inspector/InspectorInstrumentation.h b/Source/WebCore/inspector/InspectorInstrumentation.h
>index c86453f142599f0a385775a1700667da4745df2d..9d132c5d7618a3a54adb19187ab573d6a442a053 100644
>--- a/Source/WebCore/inspector/InspectorInstrumentation.h
>+++ b/Source/WebCore/inspector/InspectorInstrumentation.h
>@@ -111,9 +111,9 @@ public:
> static void didInsertDOMNode(Document&, Node&);
> static void willRemoveDOMNode(Document&, Node&);
> static void didRemoveDOMNode(Document&, Node&);
>- static void willModifyDOMAttr(Document&, Element&, const AtomicString& oldValue, const AtomicString& newValue);
>- static void didModifyDOMAttr(Document&, Element&, const AtomicString& name, const AtomicString& value);
>- static void didRemoveDOMAttr(Document&, Element&, const AtomicString& name);
>+ static void willModifyDOMAttr(Document&, Element&, const AtomString& oldValue, const AtomString& newValue);
>+ static void didModifyDOMAttr(Document&, Element&, const AtomString& name, const AtomString& value);
>+ static void didRemoveDOMAttr(Document&, Element&, const AtomString& name);
> static void characterDataModified(Document&, CharacterData&);
> static void willInvalidateStyleAttr(Element&);
> static void didInvalidateStyleAttr(Element&);
>@@ -149,9 +149,9 @@ public:
> 
> static InspectorInstrumentationCookie willCallFunction(ScriptExecutionContext*, const String& scriptName, int scriptLine, int scriptColumn);
> static void didCallFunction(const InspectorInstrumentationCookie&, ScriptExecutionContext*);
>- static void didAddEventListener(EventTarget&, const AtomicString& eventType, EventListener&, bool capture);
>- static void willRemoveEventListener(EventTarget&, const AtomicString& eventType, EventListener&, bool capture);
>- static bool isEventListenerDisabled(EventTarget&, const AtomicString& eventType, EventListener&, bool capture);
>+ static void didAddEventListener(EventTarget&, const AtomString& eventType, EventListener&, bool capture);
>+ static void willRemoveEventListener(EventTarget&, const AtomString& eventType, EventListener&, bool capture);
>+ static bool isEventListenerDisabled(EventTarget&, const AtomString& eventType, EventListener&, bool capture);
> static InspectorInstrumentationCookie willDispatchEvent(Document&, const Event&, bool hasEventListeners);
> static void didDispatchEvent(const InspectorInstrumentationCookie&, bool defaultPrevented);
> static void willHandleEvent(ScriptExecutionContext&, Event&, const RegisteredEventListener&);
>@@ -305,9 +305,9 @@ private:
> static void didInsertDOMNodeImpl(InstrumentingAgents&, Node&);
> static void willRemoveDOMNodeImpl(InstrumentingAgents&, Node&);
> static void didRemoveDOMNodeImpl(InstrumentingAgents&, Node&);
>- static void willModifyDOMAttrImpl(InstrumentingAgents&, Element&, const AtomicString& oldValue, const AtomicString& newValue);
>- static void didModifyDOMAttrImpl(InstrumentingAgents&, Element&, const AtomicString& name, const AtomicString& value);
>- static void didRemoveDOMAttrImpl(InstrumentingAgents&, Element&, const AtomicString& name);
>+ static void willModifyDOMAttrImpl(InstrumentingAgents&, Element&, const AtomString& oldValue, const AtomString& newValue);
>+ static void didModifyDOMAttrImpl(InstrumentingAgents&, Element&, const AtomString& name, const AtomString& value);
>+ static void didRemoveDOMAttrImpl(InstrumentingAgents&, Element&, const AtomString& name);
> static void characterDataModifiedImpl(InstrumentingAgents&, CharacterData&);
> static void willInvalidateStyleAttrImpl(InstrumentingAgents&, Element&);
> static void didInvalidateStyleAttrImpl(InstrumentingAgents&, Element&);
>@@ -343,9 +343,9 @@ private:
> 
> static InspectorInstrumentationCookie willCallFunctionImpl(InstrumentingAgents&, const String& scriptName, int scriptLine, int scriptColumn, ScriptExecutionContext*);
> static void didCallFunctionImpl(const InspectorInstrumentationCookie&, ScriptExecutionContext*);
>- static void didAddEventListenerImpl(InstrumentingAgents&, EventTarget&, const AtomicString& eventType, EventListener&, bool capture);
>- static void willRemoveEventListenerImpl(InstrumentingAgents&, EventTarget&, const AtomicString& eventType, EventListener&, bool capture);
>- static bool isEventListenerDisabledImpl(InstrumentingAgents&, EventTarget&, const AtomicString& eventType, EventListener&, bool capture);
>+ static void didAddEventListenerImpl(InstrumentingAgents&, EventTarget&, const AtomString& eventType, EventListener&, bool capture);
>+ static void willRemoveEventListenerImpl(InstrumentingAgents&, EventTarget&, const AtomString& eventType, EventListener&, bool capture);
>+ static bool isEventListenerDisabledImpl(InstrumentingAgents&, EventTarget&, const AtomString& eventType, EventListener&, bool capture);
> static InspectorInstrumentationCookie willDispatchEventImpl(InstrumentingAgents&, Document&, const Event&, bool hasEventListeners);
> static void willHandleEventImpl(InstrumentingAgents&, Event&, const RegisteredEventListener&);
> static void didHandleEventImpl(InstrumentingAgents&);
>@@ -533,21 +533,21 @@ inline void InspectorInstrumentation::didRemoveDOMNode(Document& document, Node&
> didRemoveDOMNodeImpl(*instrumentingAgents, node);
> }
> 
>-inline void InspectorInstrumentation::willModifyDOMAttr(Document& document, Element& element, const AtomicString& oldValue, const AtomicString& newValue)
>+inline void InspectorInstrumentation::willModifyDOMAttr(Document& document, Element& element, const AtomString& oldValue, const AtomString& newValue)
> {
> FAST_RETURN_IF_NO_FRONTENDS(void());
> if (InstrumentingAgents* instrumentingAgents = instrumentingAgentsForDocument(document))
> willModifyDOMAttrImpl(*instrumentingAgents, element, oldValue, newValue);
> }
> 
>-inline void InspectorInstrumentation::didModifyDOMAttr(Document& document, Element& element, const AtomicString& name, const AtomicString& value)
>+inline void InspectorInstrumentation::didModifyDOMAttr(Document& document, Element& element, const AtomString& name, const AtomString& value)
> {
> FAST_RETURN_IF_NO_FRONTENDS(void());
> if (InstrumentingAgents* instrumentingAgents = instrumentingAgentsForDocument(document))
> didModifyDOMAttrImpl(*instrumentingAgents, element, name, value);
> }
> 
>-inline void InspectorInstrumentation::didRemoveDOMAttr(Document& document, Element& element, const AtomicString& name)
>+inline void InspectorInstrumentation::didRemoveDOMAttr(Document& document, Element& element, const AtomString& name)
> {
> FAST_RETURN_IF_NO_FRONTENDS(void());
> if (InstrumentingAgents* instrumentingAgents = instrumentingAgentsForDocument(document))
>@@ -730,21 +730,21 @@ inline void InspectorInstrumentation::didRemoveTimer(ScriptExecutionContext& con
> didRemoveTimerImpl(*instrumentingAgents, timerId, context);
> }
> 
>-inline void InspectorInstrumentation::didAddEventListener(EventTarget& target, const AtomicString& eventType, EventListener& listener, bool capture)
>+inline void InspectorInstrumentation::didAddEventListener(EventTarget& target, const AtomString& eventType, EventListener& listener, bool capture)
> {
> FAST_RETURN_IF_NO_FRONTENDS(void());
> if (InstrumentingAgents* instrumentingAgents = instrumentingAgentsForContext(target.scriptExecutionContext()))
> didAddEventListenerImpl(*instrumentingAgents, target, eventType, listener, capture);
> }
> 
>-inline void InspectorInstrumentation::willRemoveEventListener(EventTarget& target, const AtomicString& eventType, EventListener& listener, bool capture)
>+inline void InspectorInstrumentation::willRemoveEventListener(EventTarget& target, const AtomString& eventType, EventListener& listener, bool capture)
> {
> FAST_RETURN_IF_NO_FRONTENDS(void());
> if (InstrumentingAgents* instrumentingAgents = instrumentingAgentsForContext(target.scriptExecutionContext()))
> willRemoveEventListenerImpl(*instrumentingAgents, target, eventType, listener, capture);
> }
> 
>-inline bool InspectorInstrumentation::isEventListenerDisabled(EventTarget& target, const AtomicString& eventType, EventListener& listener, bool capture)
>+inline bool InspectorInstrumentation::isEventListenerDisabled(EventTarget& target, const AtomString& eventType, EventListener& listener, bool capture)
> {
> FAST_RETURN_IF_NO_FRONTENDS(false);
> if (InstrumentingAgents* instrumentingAgents = instrumentingAgentsForContext(target.scriptExecutionContext()))
>diff --git a/Source/WebCore/inspector/agents/InspectorCSSAgent.cpp b/Source/WebCore/inspector/agents/InspectorCSSAgent.cpp
>index 0e56ecfff3c12db6bdb0488dfcfad8817d36681a..5c3f2b114942ba0ed2a830c83b72e998085a888c 100644
>--- a/Source/WebCore/inspector/agents/InspectorCSSAgent.cpp
>+++ b/Source/WebCore/inspector/agents/InspectorCSSAgent.cpp
>@@ -714,7 +714,7 @@ InspectorStyleSheet* InspectorCSSAgent::createInspectorStyleSheetForDocument(Doc
> return nullptr;
> 
> auto styleElement = HTMLStyleElement::create(document);
>- styleElement->setAttributeWithoutSynchronization(HTMLNames::typeAttr, AtomicString("text/css", AtomicString::ConstructFromLiteral));
>+ styleElement->setAttributeWithoutSynchronization(HTMLNames::typeAttr, AtomString("text/css", AtomString::ConstructFromLiteral));
> 
> ContainerNode* targetNode;
> // HEAD is absent in ImageDocuments, for example.
>diff --git a/Source/WebCore/inspector/agents/InspectorDOMAgent.cpp b/Source/WebCore/inspector/agents/InspectorDOMAgent.cpp
>index 7d98960e36eff6abdcc25ace8ff2cfe38cf319cb..0d59785c1ec682b59ba0972ca9604dcbcd97d124 100644
>--- a/Source/WebCore/inspector/agents/InspectorDOMAgent.cpp
>+++ b/Source/WebCore/inspector/agents/InspectorDOMAgent.cpp
>@@ -894,7 +894,7 @@ void InspectorDOMAgent::getEventListenersForNode(ErrorString& errorString, int n
> 
> struct EventListenerInfo {
> RefPtr<EventTarget> eventTarget;
>- const AtomicString eventType;
>+ const AtomString eventType;
> const EventListenerVector eventListeners;
> };
> 
>@@ -1677,7 +1677,7 @@ RefPtr<JSON::ArrayOf<Inspector::Protocol::DOM::Node>> InspectorDOMAgent::buildAr
> return pseudoElements;
> }
> 
>-Ref<Inspector::Protocol::DOM::EventListener> InspectorDOMAgent::buildObjectForEventListener(const RegisteredEventListener& registeredEventListener, int identifier, EventTarget& eventTarget, const AtomicString& eventType, bool disabled, bool hasBreakpoint)
>+Ref<Inspector::Protocol::DOM::EventListener> InspectorDOMAgent::buildObjectForEventListener(const RegisteredEventListener& registeredEventListener, int identifier, EventTarget& eventTarget, const AtomString& eventType, bool disabled, bool hasBreakpoint)
> {
> Ref<EventListener> eventListener = registeredEventListener.callback();
> 
>@@ -2176,7 +2176,7 @@ void InspectorDOMAgent::addEventListenersToNode(Node& node)
> #if ENABLE(VIDEO)
> auto callback = EventFiredCallback::create(*this);
> 
>- auto createEventListener = [&] (const AtomicString& eventName) {
>+ auto createEventListener = [&] (const AtomString& eventName) {
> node.addEventListener(eventName, callback.copyRef(), false);
> };
> 
>@@ -2262,12 +2262,12 @@ void InspectorDOMAgent::didRemoveDOMNode(Node& node)
> unbind(&node, &m_documentNodeToIdMap);
> }
> 
>-void InspectorDOMAgent::willModifyDOMAttr(Element&, const AtomicString& oldValue, const AtomicString& newValue)
>+void InspectorDOMAgent::willModifyDOMAttr(Element&, const AtomString& oldValue, const AtomString& newValue)
> {
> m_suppressAttributeModifiedEvent = (oldValue == newValue);
> }
> 
>-void InspectorDOMAgent::didModifyDOMAttr(Element& element, const AtomicString& name, const AtomicString& value)
>+void InspectorDOMAgent::didModifyDOMAttr(Element& element, const AtomString& name, const AtomString& value)
> {
> bool shouldSuppressEvent = m_suppressAttributeModifiedEvent;
> m_suppressAttributeModifiedEvent = false;
>@@ -2284,7 +2284,7 @@ void InspectorDOMAgent::didModifyDOMAttr(Element& element, const AtomicString& n
> m_frontendDispatcher->attributeModified(id, name, value);
> }
> 
>-void InspectorDOMAgent::didRemoveDOMAttr(Element& element, const AtomicString& name)
>+void InspectorDOMAgent::didRemoveDOMAttr(Element& element, const AtomString& name)
> {
> int id = boundNodeId(&element);
> if (!id)
>@@ -2423,7 +2423,7 @@ void InspectorDOMAgent::didAddEventListener(EventTarget& target)
> m_frontendDispatcher->didAddEventListener(nodeId);
> }
> 
>-void InspectorDOMAgent::willRemoveEventListener(EventTarget& target, const AtomicString& eventType, EventListener& listener, bool capture)
>+void InspectorDOMAgent::willRemoveEventListener(EventTarget& target, const AtomString& eventType, EventListener& listener, bool capture)
> {
> if (!is<Node>(target))
> return;
>@@ -2459,7 +2459,7 @@ void InspectorDOMAgent::willRemoveEventListener(EventTarget& target, const Atomi
> m_frontendDispatcher->willRemoveEventListener(nodeId);
> }
> 
>-bool InspectorDOMAgent::isEventListenerDisabled(EventTarget& target, const AtomicString& eventType, EventListener& listener, bool capture)
>+bool InspectorDOMAgent::isEventListenerDisabled(EventTarget& target, const AtomString& eventType, EventListener& listener, bool capture)
> {
> for (auto& inspectorEventListener : m_eventListenerEntries.values()) {
> if (inspectorEventListener.matches(target, eventType, listener, capture))
>@@ -2473,7 +2473,7 @@ void InspectorDOMAgent::eventDidResetAfterDispatch(const Event& event)
> m_dispatchedEvents.remove(&event);
> }
> 
>-bool InspectorDOMAgent::hasBreakpointForEventListener(EventTarget& target, const AtomicString& eventType, EventListener& listener, bool capture)
>+bool InspectorDOMAgent::hasBreakpointForEventListener(EventTarget& target, const AtomString& eventType, EventListener& listener, bool capture)
> {
> for (auto& inspectorEventListener : m_eventListenerEntries.values()) {
> if (inspectorEventListener.matches(target, eventType, listener, capture))
>@@ -2482,7 +2482,7 @@ bool InspectorDOMAgent::hasBreakpointForEventListener(EventTarget& target, const
> return false;
> }
> 
>-int InspectorDOMAgent::idForEventListener(EventTarget& target, const AtomicString& eventType, EventListener& listener, bool capture)
>+int InspectorDOMAgent::idForEventListener(EventTarget& target, const AtomString& eventType, EventListener& listener, bool capture)
> {
> for (auto& inspectorEventListener : m_eventListenerEntries.values()) {
> if (inspectorEventListener.matches(target, eventType, listener, capture))
>diff --git a/Source/WebCore/inspector/agents/InspectorDOMAgent.h b/Source/WebCore/inspector/agents/InspectorDOMAgent.h
>index 58d3a20767f1fd7a1e395180c3b19ca749948506..73fe203ed32e4716516aec785ff88adb104fd53b 100644
>--- a/Source/WebCore/inspector/agents/InspectorDOMAgent.h
>+++ b/Source/WebCore/inspector/agents/InspectorDOMAgent.h
>@@ -39,7 +39,7 @@
> #include <wtf/JSONValues.h>
> #include <wtf/RefPtr.h>
> #include <wtf/Vector.h>
>-#include <wtf/text/AtomicString.h>
>+#include <wtf/text/AtomString.h>
> 
> namespace Inspector {
> class InjectedScriptManager;
>@@ -142,9 +142,9 @@ public:
> void addEventListenersToNode(Node&);
> void didInsertDOMNode(Node&);
> void didRemoveDOMNode(Node&);
>- void willModifyDOMAttr(Element&, const AtomicString& oldValue, const AtomicString& newValue);
>- void didModifyDOMAttr(Element&, const AtomicString& name, const AtomicString& value);
>- void didRemoveDOMAttr(Element&, const AtomicString& name);
>+ void willModifyDOMAttr(Element&, const AtomString& oldValue, const AtomString& newValue);
>+ void didModifyDOMAttr(Element&, const AtomString& name, const AtomString& value);
>+ void didRemoveDOMAttr(Element&, const AtomString& name);
> void characterDataModified(CharacterData&);
> void didInvalidateStyleAttr(Element&);
> void didPushShadowRoot(Element& host, ShadowRoot&);
>@@ -156,8 +156,8 @@ public:
> void pseudoElementCreated(PseudoElement&);
> void pseudoElementDestroyed(PseudoElement&);
> void didAddEventListener(EventTarget&);
>- void willRemoveEventListener(EventTarget&, const AtomicString& eventType, EventListener&, bool capture);
>- bool isEventListenerDisabled(EventTarget&, const AtomicString& eventType, EventListener&, bool capture);
>+ void willRemoveEventListener(EventTarget&, const AtomString& eventType, EventListener&, bool capture);
>+ bool isEventListenerDisabled(EventTarget&, const AtomString& eventType, EventListener&, bool capture);
> void eventDidResetAfterDispatch(const Event&);
> 
> // Callbacks that don't directly correspond to an instrumentation entry point.
>@@ -195,8 +195,8 @@ public:
> static Node* scriptValueAsNode(JSC::JSValue);
> static JSC::JSValue nodeAsScriptValue(JSC::ExecState&, Node*);
> 
>- bool hasBreakpointForEventListener(EventTarget&, const AtomicString& eventType, EventListener&, bool capture);
>- int idForEventListener(EventTarget&, const AtomicString& eventType, EventListener&, bool capture);
>+ bool hasBreakpointForEventListener(EventTarget&, const AtomString& eventType, EventListener&, bool capture);
>+ int idForEventListener(EventTarget&, const AtomString& eventType, EventListener&, bool capture);
> 
> private:
> #if ENABLE(VIDEO)
>@@ -222,7 +222,7 @@ private:
> Ref<JSON::ArrayOf<String>> buildArrayForElementAttributes(Element*);
> Ref<JSON::ArrayOf<Inspector::Protocol::DOM::Node>> buildArrayForContainerChildren(Node* container, int depth, NodeToIdMap* nodesMap);
> RefPtr<JSON::ArrayOf<Inspector::Protocol::DOM::Node>> buildArrayForPseudoElements(const Element&, NodeToIdMap* nodesMap);
>- Ref<Inspector::Protocol::DOM::EventListener> buildObjectForEventListener(const RegisteredEventListener&, int identifier, EventTarget&, const AtomicString& eventType, bool disabled, bool hasBreakpoint);
>+ Ref<Inspector::Protocol::DOM::EventListener> buildObjectForEventListener(const RegisteredEventListener&, int identifier, EventTarget&, const AtomString& eventType, bool disabled, bool hasBreakpoint);
> RefPtr<Inspector::Protocol::DOM::AccessibilityProperties> buildObjectForAccessibilityProperties(Node*);
> void processAccessibilityChildren(AccessibilityObject&, JSON::ArrayOf<int>&);
> 
>@@ -282,14 +282,14 @@ private:
> int identifier { 1 };
> RefPtr<EventTarget> eventTarget;
> RefPtr<EventListener> eventListener;
>- AtomicString eventType;
>+ AtomString eventType;
> bool useCapture { false };
> bool disabled { false };
> bool hasBreakpoint { false };
> 
> InspectorEventListener() { }
> 
>- InspectorEventListener(int identifier, EventTarget& target, const AtomicString& type, EventListener& listener, bool capture)
>+ InspectorEventListener(int identifier, EventTarget& target, const AtomString& type, EventListener& listener, bool capture)
> : identifier(identifier)
> , eventTarget(&target)
> , eventListener(&listener)
>@@ -298,7 +298,7 @@ private:
> {
> }
> 
>- bool matches(EventTarget& target, const AtomicString& type, EventListener& listener, bool capture)
>+ bool matches(EventTarget& target, const AtomString& type, EventListener& listener, bool capture)
> {
> if (eventTarget.get() != &target)
> return false;
>diff --git a/Source/WebCore/inspector/agents/page/PageDebuggerAgent.cpp b/Source/WebCore/inspector/agents/page/PageDebuggerAgent.cpp
>index e8cf48fd6d044f72e67975717dd34c110fac1aaf..4f443227acd527c9afc0a515b39a12c7d3634c92 100644
>--- a/Source/WebCore/inspector/agents/page/PageDebuggerAgent.cpp
>+++ b/Source/WebCore/inspector/agents/page/PageDebuggerAgent.cpp
>@@ -156,7 +156,7 @@ void PageDebuggerAgent::mainFrameNavigated()
> setSuppressAllPauses(false);
> }
> 
>-void PageDebuggerAgent::didAddEventListener(EventTarget& target, const AtomicString& eventType, EventListener& listener, bool capture)
>+void PageDebuggerAgent::didAddEventListener(EventTarget& target, const AtomString& eventType, EventListener& listener, bool capture)
> {
> if (!breakpointsActive())
> return;
>@@ -182,7 +182,7 @@ void PageDebuggerAgent::didAddEventListener(EventTarget& target, const AtomicStr
> didScheduleAsyncCall(scriptState, InspectorDebuggerAgent::AsyncCallType::EventListener, identifier, registeredListener->isOnce());
> }
> 
>-void PageDebuggerAgent::willRemoveEventListener(EventTarget& target, const AtomicString& eventType, EventListener& listener, bool capture)
>+void PageDebuggerAgent::willRemoveEventListener(EventTarget& target, const AtomString& eventType, EventListener& listener, bool capture)
> {
> auto& eventListeners = target.eventListeners(eventType);
> size_t listenerIndex = eventListeners.findMatching([&](auto& registeredListener) {
>diff --git a/Source/WebCore/inspector/agents/page/PageDebuggerAgent.h b/Source/WebCore/inspector/agents/page/PageDebuggerAgent.h
>index a2acc2df00aa22efc598f0d243a849789532fed8..085de07654b995828d7056929a64e2534cb3bbc1 100644
>--- a/Source/WebCore/inspector/agents/page/PageDebuggerAgent.h
>+++ b/Source/WebCore/inspector/agents/page/PageDebuggerAgent.h
>@@ -59,8 +59,8 @@ public:
> void willFireAnimationFrame(int callbackId);
> void didCancelAnimationFrame(int callbackId);
> 
>- void didAddEventListener(EventTarget&, const AtomicString& eventType, EventListener&, bool capture);
>- void willRemoveEventListener(EventTarget&, const AtomicString& eventType, EventListener&, bool capture);
>+ void didAddEventListener(EventTarget&, const AtomString& eventType, EventListener&, bool capture);
>+ void willRemoveEventListener(EventTarget&, const AtomString& eventType, EventListener&, bool capture);
> void willHandleEvent(const RegisteredEventListener&);
> 
> void didPostMessage(const TimerBase&, JSC::ExecState&);
>diff --git a/Source/WebCore/loader/CrossOriginAccessControl.cpp b/Source/WebCore/loader/CrossOriginAccessControl.cpp
>index 1f67c1de5889e067994ad47148ca390685d77b08..d0d54b97eae720426f961c8dae895e20369cedcc 100644
>--- a/Source/WebCore/loader/CrossOriginAccessControl.cpp
>+++ b/Source/WebCore/loader/CrossOriginAccessControl.cpp
>@@ -38,7 +38,7 @@
> #include "SecurityPolicy.h"
> #include <mutex>
> #include <wtf/NeverDestroyed.h>
>-#include <wtf/text/AtomicString.h>
>+#include <wtf/text/AtomString.h>
> #include <wtf/text/StringBuilder.h>
> 
> namespace WebCore {
>diff --git a/Source/WebCore/loader/EmptyClients.cpp b/Source/WebCore/loader/EmptyClients.cpp
>index a57101caa581a733cf691b6fa85db2ce80e8f963..603e57efe0f74cae9ce99bbbd2cfa3baa7b4b5d7 100644
>--- a/Source/WebCore/loader/EmptyClients.cpp
>+++ b/Source/WebCore/loader/EmptyClients.cpp
>@@ -370,8 +370,8 @@ public:
> 
> private:
> PopupMenu* popupMenu() final { return m_popup.ptr(); }
>- void saveRecentSearches(const AtomicString&, const Vector<RecentSearch>&) final { }
>- void loadRecentSearches(const AtomicString&, Vector<RecentSearch>&) final { }
>+ void saveRecentSearches(const AtomString&, const Vector<RecentSearch>&) final { }
>+ void loadRecentSearches(const AtomString&, Vector<RecentSearch>&) final { }
> bool enabled() final { return false; }
> 
> Ref<EmptyPopupMenu> m_popup;
>@@ -414,7 +414,7 @@ class EmptyUserContentProvider final : public UserContentProvider {
> };
> 
> class EmptyVisitedLinkStore final : public VisitedLinkStore {
>- bool isLinkVisited(Page&, SharedStringHash, const URL&, const AtomicString&) final { return false; }
>+ bool isLinkVisited(Page&, SharedStringHash, const URL&, const AtomString&) final { return false; }
> void addVisitedLink(Page&, SharedStringHash) final { }
> };
> 
>diff --git a/Source/WebCore/loader/FormSubmission.cpp b/Source/WebCore/loader/FormSubmission.cpp
>index 9b8e60473cc63b12d835c99307606a0b88c24b23..be03e4a19e117225fce8127af174c1b04f9554f4 100644
>--- a/Source/WebCore/loader/FormSubmission.cpp
>+++ b/Source/WebCore/loader/FormSubmission.cpp
>@@ -147,7 +147,7 @@ Ref<FormSubmission> FormSubmission::create(HTMLFormElement& form, const Attribut
> auto copiedAttributes = attributes;
> 
> if (auto* submitButton = form.findSubmitButton(event)) {
>- AtomicString attributeValue;
>+ AtomString attributeValue;
> if (!(attributeValue = submitButton->attributeWithoutSynchronization(formactionAttr)).isNull())
> copiedAttributes.parseAction(attributeValue);
> if (!(attributeValue = submitButton->attributeWithoutSynchronization(formenctypeAttr)).isNull())
>diff --git a/Source/WebCore/loader/FrameLoadRequest.cpp b/Source/WebCore/loader/FrameLoadRequest.cpp
>index aaacbaccc1fc9263984f649369dd159673cf2d91..827e49382fc6d8f26d80552d1f2d2f72808f236c 100644
>--- a/Source/WebCore/loader/FrameLoadRequest.cpp
>+++ b/Source/WebCore/loader/FrameLoadRequest.cpp
>@@ -37,7 +37,7 @@
> 
> namespace WebCore {
> 
>-FrameLoadRequest::FrameLoadRequest(Document& requester, SecurityOrigin& requesterSecurityOrigin, const ResourceRequest& resourceRequest, const String& frameName, LockHistory lockHistory, LockBackForwardList lockBackForwardList, ShouldSendReferrer shouldSendReferrer, AllowNavigationToInvalidURL allowNavigationToInvalidURL, NewFrameOpenerPolicy newFrameOpenerPolicy, ShouldOpenExternalURLsPolicy shouldOpenExternalURLsPolicy, InitiatedByMainFrame initiatedByMainFrame, ShouldReplaceDocumentIfJavaScriptURL shouldReplaceDocumentIfJavaScriptURL, const AtomicString& downloadAttribute, const SystemPreviewInfo& systemPreviewInfo)
>+FrameLoadRequest::FrameLoadRequest(Document& requester, SecurityOrigin& requesterSecurityOrigin, const ResourceRequest& resourceRequest, const String& frameName, LockHistory lockHistory, LockBackForwardList lockBackForwardList, ShouldSendReferrer shouldSendReferrer, AllowNavigationToInvalidURL allowNavigationToInvalidURL, NewFrameOpenerPolicy newFrameOpenerPolicy, ShouldOpenExternalURLsPolicy shouldOpenExternalURLsPolicy, InitiatedByMainFrame initiatedByMainFrame, ShouldReplaceDocumentIfJavaScriptURL shouldReplaceDocumentIfJavaScriptURL, const AtomString& downloadAttribute, const SystemPreviewInfo& systemPreviewInfo)
> : m_requester { makeRef(requester) }
> , m_requesterSecurityOrigin { makeRef(requesterSecurityOrigin) }
> , m_resourceRequest { resourceRequest }
>diff --git a/Source/WebCore/loader/FrameLoadRequest.h b/Source/WebCore/loader/FrameLoadRequest.h
>index a74c490a5c20fbaf414af677a50ba87a51765c2b..1d81fe47a30418b9225d27ab1b4977d3dcbf0697 100644
>--- a/Source/WebCore/loader/FrameLoadRequest.h
>+++ b/Source/WebCore/loader/FrameLoadRequest.h
>@@ -38,7 +38,7 @@ class SecurityOrigin;
> 
> class FrameLoadRequest {
> public:
>- WEBCORE_EXPORT FrameLoadRequest(Document&, SecurityOrigin&, const ResourceRequest&, const String& frameName, LockHistory, LockBackForwardList, ShouldSendReferrer, AllowNavigationToInvalidURL, NewFrameOpenerPolicy, ShouldOpenExternalURLsPolicy, InitiatedByMainFrame, ShouldReplaceDocumentIfJavaScriptURL = ReplaceDocumentIfJavaScriptURL, const AtomicString& downloadAttribute = { }, const SystemPreviewInfo& = { });
>+ WEBCORE_EXPORT FrameLoadRequest(Document&, SecurityOrigin&, const ResourceRequest&, const String& frameName, LockHistory, LockBackForwardList, ShouldSendReferrer, AllowNavigationToInvalidURL, NewFrameOpenerPolicy, ShouldOpenExternalURLsPolicy, InitiatedByMainFrame, ShouldReplaceDocumentIfJavaScriptURL = ReplaceDocumentIfJavaScriptURL, const AtomString& downloadAttribute = { }, const SystemPreviewInfo& = { });
> WEBCORE_EXPORT FrameLoadRequest(Frame&, const ResourceRequest&, ShouldOpenExternalURLsPolicy, const SubstituteData& = SubstituteData());
> 
> WEBCORE_EXPORT ~FrameLoadRequest();
>@@ -87,7 +87,7 @@ public:
> void setShouldOpenExternalURLsPolicy(ShouldOpenExternalURLsPolicy policy) { m_shouldOpenExternalURLsPolicy = policy; }
> ShouldOpenExternalURLsPolicy shouldOpenExternalURLsPolicy() const { return m_shouldOpenExternalURLsPolicy; }
> 
>- const AtomicString& downloadAttribute() const { return m_downloadAttribute; }
>+ const AtomString& downloadAttribute() const { return m_downloadAttribute; }
> 
> InitiatedByMainFrame initiatedByMainFrame() const { return m_initiatedByMainFrame; }
> 
>@@ -114,7 +114,7 @@ private:
> NewFrameOpenerPolicy m_newFrameOpenerPolicy;
> ShouldReplaceDocumentIfJavaScriptURL m_shouldReplaceDocumentIfJavaScriptURL;
> ShouldOpenExternalURLsPolicy m_shouldOpenExternalURLsPolicy { ShouldOpenExternalURLsPolicy::ShouldNotAllow };
>- AtomicString m_downloadAttribute;
>+ AtomString m_downloadAttribute;
> InitiatedByMainFrame m_initiatedByMainFrame { InitiatedByMainFrame::Unknown };
> SystemPreviewInfo m_systemPreviewInfo;
> bool m_isRequestFromClientOrUserInput { false };
>diff --git a/Source/WebCore/loader/FrameLoader.cpp b/Source/WebCore/loader/FrameLoader.cpp
>index a1e0d9378deefeddc0111b75a3d90bd4d425126a..7e4136038a53a1a0d64035cdb895a4bc2ab05739 100644
>--- a/Source/WebCore/loader/FrameLoader.cpp
>+++ b/Source/WebCore/loader/FrameLoader.cpp
>@@ -381,7 +381,7 @@ void FrameLoader::changeLocation(FrameLoadRequest&& request)
> urlSelected(WTFMove(request), nullptr);
> }
> 
>-void FrameLoader::urlSelected(const URL& url, const String& passedTarget, Event* triggeringEvent, LockHistory lockHistory, LockBackForwardList lockBackForwardList, ShouldSendReferrer shouldSendReferrer, ShouldOpenExternalURLsPolicy shouldOpenExternalURLsPolicy, Optional<NewFrameOpenerPolicy> openerPolicy, const AtomicString& downloadAttribute, const SystemPreviewInfo& systemPreviewInfo, Optional<AdClickAttribution>&& adClickAttribution)
>+void FrameLoader::urlSelected(const URL& url, const String& passedTarget, Event* triggeringEvent, LockHistory lockHistory, LockBackForwardList lockBackForwardList, ShouldSendReferrer shouldSendReferrer, ShouldOpenExternalURLsPolicy shouldOpenExternalURLsPolicy, Optional<NewFrameOpenerPolicy> openerPolicy, const AtomString& downloadAttribute, const SystemPreviewInfo& systemPreviewInfo, Optional<AdClickAttribution>&& adClickAttribution)
> {
> auto* frame = lexicalFrameFromCommonVM();
> auto initiatedByMainFrame = frame && frame->isMainFrame() ? InitiatedByMainFrame::Yes : InitiatedByMainFrame::Unknown;
>@@ -3677,7 +3677,7 @@ bool FrameLoader::shouldTreatURLAsSrcdocDocument(const URL& url) const
> return ownerElement->hasAttributeWithoutSynchronization(srcdocAttr);
> }
> 
>-Frame* FrameLoader::findFrameForNavigation(const AtomicString& name, Document* activeDocument)
>+Frame* FrameLoader::findFrameForNavigation(const AtomString& name, Document* activeDocument)
> {
> // FIXME: Eventually all callers should supply the actual activeDocument so we can call canNavigate with the right document.
> if (!activeDocument)
>diff --git a/Source/WebCore/loader/FrameLoader.h b/Source/WebCore/loader/FrameLoader.h
>index dedbbbcd5252ccf1e3b420168ae3a3565b1d50f0..d47326987d82417cafe25032b6f5534699b388b1 100644
>--- a/Source/WebCore/loader/FrameLoader.h
>+++ b/Source/WebCore/loader/FrameLoader.h
>@@ -126,7 +126,7 @@ public:
> unsigned long loadResourceSynchronously(const ResourceRequest&, ClientCredentialPolicy, const FetchOptions&, const HTTPHeaderMap&, ResourceError&, ResourceResponse&, RefPtr<SharedBuffer>& data);
> 
> void changeLocation(FrameLoadRequest&&);
>- WEBCORE_EXPORT void urlSelected(const URL&, const String& target, Event*, LockHistory, LockBackForwardList, ShouldSendReferrer, ShouldOpenExternalURLsPolicy, Optional<NewFrameOpenerPolicy> = WTF::nullopt, const AtomicString& downloadAttribute = nullAtom(), const SystemPreviewInfo& = { }, Optional<AdClickAttribution>&& = WTF::nullopt);
>+ WEBCORE_EXPORT void urlSelected(const URL&, const String& target, Event*, LockHistory, LockBackForwardList, ShouldSendReferrer, ShouldOpenExternalURLsPolicy, Optional<NewFrameOpenerPolicy> = WTF::nullopt, const AtomString& downloadAttribute = nullAtom(), const SystemPreviewInfo& = { }, Optional<AdClickAttribution>&& = WTF::nullopt);
> void submitForm(Ref<FormSubmission>&&);
> 
> WEBCORE_EXPORT void reload(OptionSet<ReloadOption> = { });
>@@ -275,7 +275,7 @@ public:
> 
> FrameLoaderStateMachine& stateMachine() { return m_stateMachine; }
> 
>- WEBCORE_EXPORT Frame* findFrameForNavigation(const AtomicString& name, Document* activeDocument = nullptr);
>+ WEBCORE_EXPORT Frame* findFrameForNavigation(const AtomString& name, Document* activeDocument = nullptr);
> 
> void applyUserAgentIfNeeded(ResourceRequest&);
> 
>diff --git a/Source/WebCore/loader/ImageLoader.cpp b/Source/WebCore/loader/ImageLoader.cpp
>index 03fbb318c3e2d3608e77463277d1613803b3e00c..86d64ea39ac43ed9f1562c34fe82ee7323f864d3 100644
>--- a/Source/WebCore/loader/ImageLoader.cpp
>+++ b/Source/WebCore/loader/ImageLoader.cpp
>@@ -165,7 +165,7 @@ void ImageLoader::updateFromElement()
> if (!document.hasLivingRenderTree())
> return;
> 
>- AtomicString attr = element().imageSourceURL();
>+ AtomString attr = element().imageSourceURL();
> 
> // Avoid loading a URL we already failed to load.
> if (!m_failedLoadURL.isEmpty() && attr == m_failedLoadURL)
>@@ -392,7 +392,7 @@ void ImageLoader::decode(Ref<DeferredPromise>&& promise)
> return;
> }
> 
>- AtomicString attr = element().imageSourceURL();
>+ AtomString attr = element().imageSourceURL();
> if (stripLeadingAndTrailingHTMLSpaces(attr).isEmpty()) {
> decodeError("Missing source URL.");
> return;
>@@ -445,7 +445,7 @@ void ImageLoader::timerFired()
> void ImageLoader::dispatchPendingEvent(ImageEventSender* eventSender)
> {
> ASSERT(eventSender == &beforeLoadEventSender() || eventSender == &loadEventSender() || eventSender == &errorEventSender());
>- const AtomicString& eventType = eventSender->eventType();
>+ const AtomString& eventType = eventSender->eventType();
> if (eventType == eventNames().beforeloadEvent)
> dispatchPendingBeforeLoadEvent();
> if (eventType == eventNames().loadEvent)
>diff --git a/Source/WebCore/loader/ImageLoader.h b/Source/WebCore/loader/ImageLoader.h
>index bd4ba9e664dacc066969fdffa3bc51c39b964cae..0cdfaad75bbdf7b0bc7dd265d5bf0e32118f057e 100644
>--- a/Source/WebCore/loader/ImageLoader.h
>+++ b/Source/WebCore/loader/ImageLoader.h
>@@ -27,7 +27,7 @@
> #include "JSDOMPromiseDeferred.h"
> #include "Timer.h"
> #include <wtf/Vector.h>
>-#include <wtf/text/AtomicString.h>
>+#include <wtf/text/AtomString.h>
> 
> namespace WebCore {
> 
>@@ -80,7 +80,7 @@ protected:
> 
> private:
> virtual void dispatchLoadEvent() = 0;
>- virtual String sourceURI(const AtomicString&) const = 0;
>+ virtual String sourceURI(const AtomString&) const = 0;
> 
> void updatedHasPendingEvent();
> 
>@@ -104,7 +104,7 @@ private:
> CachedResourceHandle<CachedImage> m_image;
> Timer m_derefElementTimer;
> RefPtr<Element> m_protectedElement;
>- AtomicString m_failedLoadURL;
>+ AtomString m_failedLoadURL;
> Vector<RefPtr<DeferredPromise>, 1> m_decodingPromises;
> bool m_hasPendingBeforeLoadEvent : 1;
> bool m_hasPendingLoadEvent : 1;
>diff --git a/Source/WebCore/loader/NavigationAction.cpp b/Source/WebCore/loader/NavigationAction.cpp
>index f26a9aaf2fd7974cd3e71c859ab43fee20f803ff..62ba2dd2f770a406e15c90395e417c42c28f520e 100644
>--- a/Source/WebCore/loader/NavigationAction.cpp
>+++ b/Source/WebCore/loader/NavigationAction.cpp
>@@ -94,7 +94,7 @@ static Optional<NavigationAction::MouseEventData> mouseEventDataForFirstMouseEve
> return WTF::nullopt;
> }
> 
>-NavigationAction::NavigationAction(Document& requester, const ResourceRequest& resourceRequest, InitiatedByMainFrame initiatedByMainFrame, NavigationType type, ShouldOpenExternalURLsPolicy shouldOpenExternalURLsPolicy, Event* event, const AtomicString& downloadAttribute)
>+NavigationAction::NavigationAction(Document& requester, const ResourceRequest& resourceRequest, InitiatedByMainFrame initiatedByMainFrame, NavigationType type, ShouldOpenExternalURLsPolicy shouldOpenExternalURLsPolicy, Event* event, const AtomString& downloadAttribute)
> : m_requester { requester }
> , m_resourceRequest { resourceRequest }
> , m_type { type }
>@@ -120,7 +120,7 @@ static NavigationType navigationType(FrameLoadType frameLoadType, bool isFormSub
> return NavigationType::Other;
> }
> 
>-NavigationAction::NavigationAction(Document& requester, const ResourceRequest& resourceRequest, InitiatedByMainFrame initiatedByMainFrame, FrameLoadType frameLoadType, bool isFormSubmission, Event* event, ShouldOpenExternalURLsPolicy shouldOpenExternalURLsPolicy, const AtomicString& downloadAttribute)
>+NavigationAction::NavigationAction(Document& requester, const ResourceRequest& resourceRequest, InitiatedByMainFrame initiatedByMainFrame, FrameLoadType frameLoadType, bool isFormSubmission, Event* event, ShouldOpenExternalURLsPolicy shouldOpenExternalURLsPolicy, const AtomString& downloadAttribute)
> : m_requester { requester }
> , m_resourceRequest { resourceRequest }
> , m_type { navigationType(frameLoadType, isFormSubmission, !!event) }
>diff --git a/Source/WebCore/loader/NavigationAction.h b/Source/WebCore/loader/NavigationAction.h
>index 4b611bf5be67ba7e01314639902fce79a84499ec..35c961aa1547b8ea0c4b9040703c85d3ea8e7e57 100644
>--- a/Source/WebCore/loader/NavigationAction.h
>+++ b/Source/WebCore/loader/NavigationAction.h
>@@ -53,8 +53,8 @@ class UIEventWithKeyState;
> class NavigationAction {
> public:
> NavigationAction();
>- WEBCORE_EXPORT NavigationAction(Document&, const ResourceRequest&, InitiatedByMainFrame, NavigationType = NavigationType::Other, ShouldOpenExternalURLsPolicy = ShouldOpenExternalURLsPolicy::ShouldNotAllow, Event* = nullptr, const AtomicString& downloadAttribute = nullAtom());
>- NavigationAction(Document&, const ResourceRequest&, InitiatedByMainFrame, FrameLoadType, bool isFormSubmission, Event* = nullptr, ShouldOpenExternalURLsPolicy = ShouldOpenExternalURLsPolicy::ShouldNotAllow, const AtomicString& downloadAttribute = nullAtom());
>+ WEBCORE_EXPORT NavigationAction(Document&, const ResourceRequest&, InitiatedByMainFrame, NavigationType = NavigationType::Other, ShouldOpenExternalURLsPolicy = ShouldOpenExternalURLsPolicy::ShouldNotAllow, Event* = nullptr, const AtomString& downloadAttribute = nullAtom());
>+ NavigationAction(Document&, const ResourceRequest&, InitiatedByMainFrame, FrameLoadType, bool isFormSubmission, Event* = nullptr, ShouldOpenExternalURLsPolicy = ShouldOpenExternalURLsPolicy::ShouldNotAllow, const AtomString& downloadAttribute = nullAtom());
> 
> WEBCORE_EXPORT ~NavigationAction();
> 
>@@ -117,7 +117,7 @@ public:
> void setShouldOpenExternalURLsPolicy(ShouldOpenExternalURLsPolicy policy) { m_shouldOpenExternalURLsPolicy = policy; }
> InitiatedByMainFrame initiatedByMainFrame() const { return m_initiatedByMainFrame; }
> 
>- const AtomicString& downloadAttribute() const { return m_downloadAttribute; }
>+ const AtomString& downloadAttribute() const { return m_downloadAttribute; }
> 
> bool treatAsSameOriginNavigation() const { return m_treatAsSameOriginNavigation; }
> 
>@@ -153,7 +153,7 @@ private:
> Optional<UIEventWithKeyStateData> m_keyStateEventData;
> Optional<MouseEventData> m_mouseEventData;
> RefPtr<UserGestureToken> m_userGestureToken { UserGestureIndicator::currentUserGesture() };
>- AtomicString m_downloadAttribute;
>+ AtomString m_downloadAttribute;
> bool m_treatAsSameOriginNavigation;
> bool m_hasOpenedFrames { false };
> bool m_openedByDOMWithOpener { false };
>diff --git a/Source/WebCore/loader/ResourceTimingInformation.cpp b/Source/WebCore/loader/ResourceTimingInformation.cpp
>index f31e3565e143ac36e6c5deaee4fdf6a57dc38c36..ac35bed76c12b887b59ef9f0f1f7ee7699b99c10 100644
>--- a/Source/WebCore/loader/ResourceTimingInformation.cpp
>+++ b/Source/WebCore/loader/ResourceTimingInformation.cpp
>@@ -89,7 +89,7 @@ void ResourceTimingInformation::addResourceTiming(CachedResource& resource, Docu
> info.added = Added;
> }
> 
>-void ResourceTimingInformation::storeResourceTimingInitiatorInformation(const CachedResourceHandle<CachedResource>& resource, const AtomicString& initiatorName, Frame* frame)
>+void ResourceTimingInformation::storeResourceTimingInitiatorInformation(const CachedResourceHandle<CachedResource>& resource, const AtomString& initiatorName, Frame* frame)
> {
> ASSERT(RuntimeEnabledFeatures::sharedFeatures().resourceTimingEnabled());
> ASSERT(resource.get());
>diff --git a/Source/WebCore/loader/ResourceTimingInformation.h b/Source/WebCore/loader/ResourceTimingInformation.h
>index 8154efad17c57f183ae96c69680c20c44993207c..6824431313b7d9a50a939abf7d3efe989fd612df 100644
>--- a/Source/WebCore/loader/ResourceTimingInformation.h
>+++ b/Source/WebCore/loader/ResourceTimingInformation.h
>@@ -41,12 +41,12 @@ public:
> static bool shouldAddResourceTiming(CachedResource&);
> 
> void addResourceTiming(CachedResource&, Document&, ResourceTiming&&);
>- void storeResourceTimingInitiatorInformation(const CachedResourceHandle<CachedResource>&, const AtomicString&, Frame*);
>+ void storeResourceTimingInitiatorInformation(const CachedResourceHandle<CachedResource>&, const AtomString&, Frame*);
> 
> private:
> enum AlreadyAdded { NotYetAdded, Added };
> struct InitiatorInfo {
>- AtomicString name;
>+ AtomString name;
> AlreadyAdded added;
> };
> HashMap<CachedResource*, InitiatorInfo> m_initiatorMap;
>diff --git a/Source/WebCore/loader/SubframeLoader.cpp b/Source/WebCore/loader/SubframeLoader.cpp
>index 5f98d556f55fb310d29022d9c2ff46ab5726f8cf..9622c4648367d90e46bab108ff54787f33943669 100644
>--- a/Source/WebCore/loader/SubframeLoader.cpp
>+++ b/Source/WebCore/loader/SubframeLoader.cpp
>@@ -73,7 +73,7 @@ void SubframeLoader::clear()
> m_containsPlugins = false;
> }
> 
>-bool SubframeLoader::requestFrame(HTMLFrameOwnerElement& ownerElement, const String& urlString, const AtomicString& frameName, LockHistory lockHistory, LockBackForwardList lockBackForwardList)
>+bool SubframeLoader::requestFrame(HTMLFrameOwnerElement& ownerElement, const String& urlString, const AtomString& frameName, LockHistory lockHistory, LockBackForwardList lockBackForwardList)
> {
> // Support for <frame src="javascript:string">
> URL scriptURL;
>@@ -218,7 +218,7 @@ static void logPluginRequest(Page* page, const String& mimeType, const String& u
> page->sawPlugin(description);
> }
> 
>-bool SubframeLoader::requestObject(HTMLPlugInImageElement& ownerElement, const String& url, const AtomicString& frameName, const String& mimeType, const Vector<String>& paramNames, const Vector<String>& paramValues)
>+bool SubframeLoader::requestObject(HTMLPlugInImageElement& ownerElement, const String& url, const AtomString& frameName, const String& mimeType, const Vector<String>& paramNames, const Vector<String>& paramValues)
> {
> if (url.isEmpty() && mimeType.isEmpty())
> return false;
>@@ -296,7 +296,7 @@ RefPtr<Widget> SubframeLoader::createJavaAppletWidget(const IntSize& size, HTMLA
> return widget;
> }
> 
>-Frame* SubframeLoader::loadOrRedirectSubframe(HTMLFrameOwnerElement& ownerElement, const URL& requestURL, const AtomicString& frameName, LockHistory lockHistory, LockBackForwardList lockBackForwardList)
>+Frame* SubframeLoader::loadOrRedirectSubframe(HTMLFrameOwnerElement& ownerElement, const URL& requestURL, const AtomString& frameName, LockHistory lockHistory, LockBackForwardList lockBackForwardList)
> {
> auto& initiatingDocument = ownerElement.document();
> 
>diff --git a/Source/WebCore/loader/SubframeLoader.h b/Source/WebCore/loader/SubframeLoader.h
>index 2caae9ca6098a7533c3093896dc203126e689476..cc7cc4243776168c8cd1d93d7a563c701a0d0668 100644
>--- a/Source/WebCore/loader/SubframeLoader.h
>+++ b/Source/WebCore/loader/SubframeLoader.h
>@@ -55,8 +55,8 @@ public:
> 
> void clear();
> 
>- bool requestFrame(HTMLFrameOwnerElement&, const String& url, const AtomicString& frameName, LockHistory = LockHistory::Yes, LockBackForwardList = LockBackForwardList::Yes);
>- bool requestObject(HTMLPlugInImageElement&, const String& url, const AtomicString& frameName,
>+ bool requestFrame(HTMLFrameOwnerElement&, const String& url, const AtomString& frameName, LockHistory = LockHistory::Yes, LockBackForwardList = LockBackForwardList::Yes);
>+ bool requestObject(HTMLPlugInImageElement&, const String& url, const AtomString& frameName,
> const String& serviceType, const Vector<String>& paramNames, const Vector<String>& paramValues);
> 
> RefPtr<Widget> createJavaAppletWidget(const IntSize&, HTMLAppletElement&, const Vector<String>& paramNames, const Vector<String>& paramValues);
>@@ -69,7 +69,7 @@ public:
> 
> private:
> bool requestPlugin(HTMLPlugInImageElement&, const URL&, const String& serviceType, const Vector<String>& paramNames, const Vector<String>& paramValues, bool useFallback);
>- Frame* loadOrRedirectSubframe(HTMLFrameOwnerElement&, const URL&, const AtomicString& frameName, LockHistory, LockBackForwardList);
>+ Frame* loadOrRedirectSubframe(HTMLFrameOwnerElement&, const URL&, const AtomString& frameName, LockHistory, LockBackForwardList);
> Frame* loadSubframe(HTMLFrameOwnerElement&, const URL&, const String& name, const String& referrer);
> bool loadPlugin(HTMLPlugInImageElement&, const URL&, const String& mimeType, const Vector<String>& paramNames, const Vector<String>& paramValues, bool useFallback);
> 
>diff --git a/Source/WebCore/loader/ThreadableLoader.h b/Source/WebCore/loader/ThreadableLoader.h
>index 861748b7c7b5b32757889c0f1a3ce0520fddcced..5c2a08e5e8684574ee94c7b7c09656a0383f3118 100644
>--- a/Source/WebCore/loader/ThreadableLoader.h
>+++ b/Source/WebCore/loader/ThreadableLoader.h
>@@ -33,7 +33,7 @@
> #include "ResourceLoaderOptions.h"
> #include <wtf/Noncopyable.h>
> #include <wtf/RefPtr.h>
>-#include <wtf/text/AtomicString.h>
>+#include <wtf/text/AtomString.h>
> 
> namespace WebCore {
> 
>@@ -64,7 +64,7 @@ namespace WebCore {
> ThreadableLoaderOptions isolatedCopy() const;
> 
> ContentSecurityPolicyEnforcement contentSecurityPolicyEnforcement { ContentSecurityPolicyEnforcement::EnforceConnectSrcDirective };
>- String initiator; // This cannot be an AtomicString, as isolatedCopy() wouldn't create an object that's safe for passing to another thread.
>+ String initiator; // This cannot be an AtomString, as isolatedCopy() wouldn't create an object that's safe for passing to another thread.
> ResponseFilteringPolicy filteringPolicy { ResponseFilteringPolicy::Disable };
> };
> 
>diff --git a/Source/WebCore/loader/appcache/ApplicationCacheGroup.cpp b/Source/WebCore/loader/appcache/ApplicationCacheGroup.cpp
>index 8e384693bf5df4a573f7f3fe5088a73c63b4888e..044d7c89c4385de020f2b1caebc8f9808b5ce4c6 100644
>--- a/Source/WebCore/loader/appcache/ApplicationCacheGroup.cpp
>+++ b/Source/WebCore/loader/appcache/ApplicationCacheGroup.cpp
>@@ -1000,13 +1000,13 @@ void ApplicationCacheGroup::scheduleReachedMaxAppCacheSizeCallback()
> // The timer will delete itself once it fires.
> }
> 
>-void ApplicationCacheGroup::postListenerTask(const AtomicString& eventType, int progressTotal, int progressDone, const HashSet<DocumentLoader*>& loaderSet)
>+void ApplicationCacheGroup::postListenerTask(const AtomString& eventType, int progressTotal, int progressDone, const HashSet<DocumentLoader*>& loaderSet)
> {
> for (auto& loader : loaderSet)
> postListenerTask(eventType, progressTotal, progressDone, *loader);
> }
> 
>-void ApplicationCacheGroup::postListenerTask(const AtomicString& eventType, int progressTotal, int progressDone, DocumentLoader& loader)
>+void ApplicationCacheGroup::postListenerTask(const AtomString& eventType, int progressTotal, int progressDone, DocumentLoader& loader)
> {
> auto* frame = loader.frame();
> if (!frame)
>diff --git a/Source/WebCore/loader/appcache/ApplicationCacheGroup.h b/Source/WebCore/loader/appcache/ApplicationCacheGroup.h
>index 47d8934ba9914a5a56d1146a797edeb84df2dbc5..f4f3c2da59b4540e4d16ec0d96c86bea50bb25b5 100644
>--- a/Source/WebCore/loader/appcache/ApplicationCacheGroup.h
>+++ b/Source/WebCore/loader/appcache/ApplicationCacheGroup.h
>@@ -94,10 +94,10 @@ public:
> void disassociateDocumentLoader(DocumentLoader&);
> 
> private:
>- static void postListenerTask(const AtomicString& eventType, const HashSet<DocumentLoader*>& set) { postListenerTask(eventType, 0, 0, set); }
>- static void postListenerTask(const AtomicString& eventType, DocumentLoader& loader) { postListenerTask(eventType, 0, 0, loader); }
>- static void postListenerTask(const AtomicString& eventType, int progressTotal, int progressDone, const HashSet<DocumentLoader*>&);
>- static void postListenerTask(const AtomicString& eventType, int progressTotal, int progressDone, DocumentLoader&);
>+ static void postListenerTask(const AtomString& eventType, const HashSet<DocumentLoader*>& set) { postListenerTask(eventType, 0, 0, set); }
>+ static void postListenerTask(const AtomString& eventType, DocumentLoader& loader) { postListenerTask(eventType, 0, 0, loader); }
>+ static void postListenerTask(const AtomString& eventType, int progressTotal, int progressDone, const HashSet<DocumentLoader*>&);
>+ static void postListenerTask(const AtomString& eventType, int progressTotal, int progressDone, DocumentLoader&);
> 
> void scheduleReachedMaxAppCacheSizeCallback();
> 
>diff --git a/Source/WebCore/loader/appcache/ApplicationCacheHost.cpp b/Source/WebCore/loader/appcache/ApplicationCacheHost.cpp
>index 91f003178abe122874354bbd91091a835d7b3adf..fcae7c66a9d51f67c32c2cce086557ae0dfd9dd6 100644
>--- a/Source/WebCore/loader/appcache/ApplicationCacheHost.cpp
>+++ b/Source/WebCore/loader/appcache/ApplicationCacheHost.cpp
>@@ -300,7 +300,7 @@ void ApplicationCacheHost::setDOMApplicationCache(DOMApplicationCache* domApplic
> m_domApplicationCache = makeWeakPtr(domApplicationCache);
> }
> 
>-void ApplicationCacheHost::notifyDOMApplicationCache(const AtomicString& eventType, int total, int done)
>+void ApplicationCacheHost::notifyDOMApplicationCache(const AtomString& eventType, int total, int done)
> {
> if (eventType != eventNames().progressEvent)
> InspectorInstrumentation::updateApplicationCacheStatus(m_documentLoader.frame());
>@@ -371,14 +371,14 @@ ApplicationCacheHost::CacheInfo ApplicationCacheHost::applicationCacheInfo()
> return { cache->manifestResource()->url(), 0, 0, cache->estimatedSizeInStorage() };
> }
> 
>-static Ref<Event> createApplicationCacheEvent(const AtomicString& eventType, int total, int done)
>+static Ref<Event> createApplicationCacheEvent(const AtomString& eventType, int total, int done)
> {
> if (eventType == eventNames().progressEvent)
> return ProgressEvent::create(eventType, true, done, total);
> return Event::create(eventType, Event::CanBubble::No, Event::IsCancelable::No);
> }
> 
>-void ApplicationCacheHost::dispatchDOMEvent(const AtomicString& eventType, int total, int done)
>+void ApplicationCacheHost::dispatchDOMEvent(const AtomString& eventType, int total, int done)
> {
> if (!m_domApplicationCache || !m_domApplicationCache->frame())
> return;
>diff --git a/Source/WebCore/loader/appcache/ApplicationCacheHost.h b/Source/WebCore/loader/appcache/ApplicationCacheHost.h
>index 01f273598a995550bc0afdf534cd108545388f35..12cfe368c05216885189fd7bd37f90f02fcccb07 100644
>--- a/Source/WebCore/loader/appcache/ApplicationCacheHost.h
>+++ b/Source/WebCore/loader/appcache/ApplicationCacheHost.h
>@@ -113,7 +113,7 @@ public:
> void abort();
> 
> void setDOMApplicationCache(DOMApplicationCache*);
>- void notifyDOMApplicationCache(const AtomicString& eventType, int progressTotal, int progressDone);
>+ void notifyDOMApplicationCache(const AtomString& eventType, int progressTotal, int progressDone);
> 
> void stopLoadingInFrame(Frame&);
> 
>@@ -129,7 +129,7 @@ private:
> friend class ApplicationCacheGroup;
> 
> struct DeferredEvent {
>- AtomicString eventType;
>+ AtomString eventType;
> int progressTotal;
> int progressDone;
> };
>@@ -137,7 +137,7 @@ private:
> bool isApplicationCacheEnabled();
> bool isApplicationCacheBlockedForRequest(const ResourceRequest&);
> 
>- void dispatchDOMEvent(const AtomicString& eventType, int progressTotal, int progressDone);
>+ void dispatchDOMEvent(const AtomString& eventType, int progressTotal, int progressDone);
> 
> bool scheduleLoadFallbackResourceFromApplicationCache(ResourceLoader*, ApplicationCache* = nullptr);
> void setCandidateApplicationCacheGroup(ApplicationCacheGroup*);
>diff --git a/Source/WebCore/loader/appcache/ApplicationCacheStorage.cpp b/Source/WebCore/loader/appcache/ApplicationCacheStorage.cpp
>index d2021575f12a4e42289ab5f19721441aae6bdd5b..da62d66cea4cf62042ad03b5a51683b8e18361c2 100644
>--- a/Source/WebCore/loader/appcache/ApplicationCacheStorage.cpp
>+++ b/Source/WebCore/loader/appcache/ApplicationCacheStorage.cpp
>@@ -1061,7 +1061,7 @@ static inline void parseHeader(const CharacterType* header, unsigned headerLengt
> 
> // Save memory by putting the header names into atomic strings so each is stored only once,
> // even though the setHTTPHeaderField function does not require an atomic string.
>- AtomicString headerName { header, colonPosition };
>+ AtomString headerName { header, colonPosition };
> String headerValue { header + colonPosition + 1, headerLength - colonPosition - 1 };
> 
> response.setHTTPHeaderField(headerName, headerValue);
>diff --git a/Source/WebCore/loader/cache/CachedFont.cpp b/Source/WebCore/loader/cache/CachedFont.cpp
>index dc59500e57d0a59c8dee40303f2a44e846f6bd74..693dda0c724a9720b589f3b911eec50e36e56b86 100644
>--- a/Source/WebCore/loader/cache/CachedFont.cpp
>+++ b/Source/WebCore/loader/cache/CachedFont.cpp
>@@ -83,7 +83,7 @@ void CachedFont::beginLoadIfNeeded(CachedResourceLoader& loader)
> }
> }
> 
>-bool CachedFont::ensureCustomFontData(const AtomicString&)
>+bool CachedFont::ensureCustomFontData(const AtomString&)
> {
> return ensureCustomFontData(m_data.get());
> }
>@@ -128,7 +128,7 @@ std::unique_ptr<FontCustomPlatformData> CachedFont::createCustomFontData(SharedB
> return createFontCustomPlatformData(bytes, itemInCollection);
> }
> 
>-RefPtr CachedFont::createFont(const FontDescription& fontDescription, const AtomicString&, bool syntheticBold, bool syntheticItalic, const FontFeatureSettings& fontFaceFeatures, const FontVariantSettings& fontFaceVariantSettings, FontSelectionSpecifiedCapabilities fontFaceCapabilities)
>+RefPtr CachedFont::createFont(const FontDescription& fontDescription, const AtomString&, bool syntheticBold, bool syntheticItalic, const FontFeatureSettings& fontFaceFeatures, const FontVariantSettings& fontFaceVariantSettings, FontSelectionSpecifiedCapabilities fontFaceCapabilities)
> {
> return Font::create(platformDataFromCustomData(fontDescription, syntheticBold, syntheticItalic, fontFaceFeatures, fontFaceVariantSettings, fontFaceCapabilities), Font::Origin::Remote);
> }
>diff --git a/Source/WebCore/loader/cache/CachedFont.h b/Source/WebCore/loader/cache/CachedFont.h
>index fac06da1579379e341f24a8b67d80447e64c9cee..580e9be925605cb2ec3ae7e0a850cb9669bea858 100644
>--- a/Source/WebCore/loader/cache/CachedFont.h
>+++ b/Source/WebCore/loader/cache/CachedFont.h
>@@ -51,11 +51,11 @@ public:
> void beginLoadIfNeeded(CachedResourceLoader&);
> bool stillNeedsLoad() const override { return !m_loadInitiated; }
> 
>- virtual bool ensureCustomFontData(const AtomicString& remoteURI);
>+ virtual bool ensureCustomFontData(const AtomString& remoteURI);
> static std::unique_ptr<FontCustomPlatformData> createCustomFontData(SharedBuffer&, const String& itemInCollection, bool& wrapping);
> static FontPlatformData platformDataFromCustomData(FontCustomPlatformData&, const FontDescription&, bool bold, bool italic, const FontFeatureSettings&, const FontVariantSettings&, FontSelectionSpecifiedCapabilities);
> 
>- virtual RefPtr createFont(const FontDescription&, const AtomicString& remoteURI, bool syntheticBold, bool syntheticItalic, const FontFeatureSettings&, const FontVariantSettings&, FontSelectionSpecifiedCapabilities);
>+ virtual RefPtr createFont(const FontDescription&, const AtomString& remoteURI, bool syntheticBold, bool syntheticItalic, const FontFeatureSettings&, const FontVariantSettings&, FontSelectionSpecifiedCapabilities);
> 
> protected:
> FontPlatformData platformDataFromCustomData(const FontDescription&, bool bold, bool italic, const FontFeatureSettings&, const FontVariantSettings&, FontSelectionSpecifiedCapabilities);
>diff --git a/Source/WebCore/loader/cache/CachedResource.h b/Source/WebCore/loader/cache/CachedResource.h
>index 9bf51e0b22744aa62e775d9ee75537f31ba88204..229a142d64413cebaefac52710bb2bf8ddedf7be 100644
>--- a/Source/WebCore/loader/cache/CachedResource.h
>+++ b/Source/WebCore/loader/cache/CachedResource.h
>@@ -217,7 +217,7 @@ public:
> void loadFrom(const CachedResource&);
> 
> SecurityOrigin* origin() const { return m_origin.get(); }
>- AtomicString initiatorName() const { return m_initiatorName; }
>+ AtomString initiatorName() const { return m_initiatorName; }
> 
> bool canDelete() const { return !hasClients() && !m_loader && !m_preloadCount && !m_handleCount && !m_resourceToRevalidate && !m_proxyResource; }
> bool hasOneHandle() const { return m_handleCount == 1; }
>@@ -347,7 +347,7 @@ private:
> 
> ResourceError m_error;
> RefPtr<SecurityOrigin> m_origin;
>- AtomicString m_initiatorName;
>+ AtomString m_initiatorName;
> 
> RedirectChainCacheStatus m_redirectChainCacheStatus;
> 
>diff --git a/Source/WebCore/loader/cache/CachedResourceRequest.cpp b/Source/WebCore/loader/cache/CachedResourceRequest.cpp
>index 39bbca27d2047997cf916cbbad1e466466590438..526b2248181289cea95b4a3c72c9620dc0d749a0 100644
>--- a/Source/WebCore/loader/cache/CachedResourceRequest.cpp
>+++ b/Source/WebCore/loader/cache/CachedResourceRequest.cpp
>@@ -67,21 +67,21 @@ void CachedResourceRequest::setInitiator(Element& element)
> m_initiatorElement = &element;
> }
> 
>-void CachedResourceRequest::setInitiator(const AtomicString& name)
>+void CachedResourceRequest::setInitiator(const AtomString& name)
> {
> ASSERT(!m_initiatorElement);
> ASSERT(m_initiatorName.isEmpty());
> m_initiatorName = name;
> }
> 
>-const AtomicString& CachedResourceRequest::initiatorName() const
>+const AtomString& CachedResourceRequest::initiatorName() const
> {
> if (m_initiatorElement)
> return m_initiatorElement->localName();
> if (!m_initiatorName.isEmpty())
> return m_initiatorName;
> 
>- static NeverDestroyed<AtomicString> defaultName("other", AtomicString::ConstructFromLiteral);
>+ static NeverDestroyed<AtomString> defaultName("other", AtomString::ConstructFromLiteral);
> return defaultName;
> }
> 
>diff --git a/Source/WebCore/loader/cache/CachedResourceRequest.h b/Source/WebCore/loader/cache/CachedResourceRequest.h
>index 613f274edf79054a2e868bde26c304117c111bc5..fbe6da517e5162e276257031ec3d336a44b0baf9 100644
>--- a/Source/WebCore/loader/cache/CachedResourceRequest.h
>+++ b/Source/WebCore/loader/cache/CachedResourceRequest.h
>@@ -33,7 +33,7 @@
> #include "SecurityOrigin.h"
> #include "ServiceWorkerIdentifier.h"
> #include <wtf/RefPtr.h>
>-#include <wtf/text/AtomicString.h>
>+#include <wtf/text/AtomString.h>
> 
> namespace WebCore {
> 
>@@ -63,8 +63,8 @@ public:
> void setPriority(Optional<ResourceLoadPriority>&& priority) { m_priority = WTFMove(priority); }
> 
> void setInitiator(Element&);
>- void setInitiator(const AtomicString& name);
>- const AtomicString& initiatorName() const;
>+ void setInitiator(const AtomString& name);
>+ const AtomString& initiatorName() const;
> 
> bool allowsCaching() const { return m_options.cachingPolicy == CachingPolicy::AllowCaching; }
> void setCachingPolicy(CachingPolicy policy) { m_options.cachingPolicy = policy; }
>@@ -116,7 +116,7 @@ private:
> ResourceLoaderOptions m_options;
> Optional<ResourceLoadPriority> m_priority;
> RefPtr<Element> m_initiatorElement;
>- AtomicString m_initiatorName;
>+ AtomString m_initiatorName;
> RefPtr<SecurityOrigin> m_origin;
> String m_fragmentIdentifier;
> bool m_isLinkPreload { false };
>diff --git a/Source/WebCore/loader/cache/CachedResourceRequestInitiators.cpp b/Source/WebCore/loader/cache/CachedResourceRequestInitiators.cpp
>index dd110c7d5f43a9395208e06113d82ef0a9da3b8b..13f5b46df93722379e8c9899b03b6a21f9df6527 100644
>--- a/Source/WebCore/loader/cache/CachedResourceRequestInitiators.cpp
>+++ b/Source/WebCore/loader/cache/CachedResourceRequestInitiators.cpp
>@@ -29,11 +29,11 @@
> namespace WebCore {
> 
> CachedResourceRequestInitiators::CachedResourceRequestInitiators()
>- : css("css", AtomicString::ConstructFromLiteral)
>- , eventsource("eventsource", AtomicString::ConstructFromLiteral)
>- , fetch("fetch", AtomicString::ConstructFromLiteral)
>- , icon("icon", AtomicString::ConstructFromLiteral)
>- , xmlhttprequest("xmlhttprequest", AtomicString::ConstructFromLiteral)
>+ : css("css", AtomString::ConstructFromLiteral)
>+ , eventsource("eventsource", AtomString::ConstructFromLiteral)
>+ , fetch("fetch", AtomString::ConstructFromLiteral)
>+ , icon("icon", AtomString::ConstructFromLiteral)
>+ , xmlhttprequest("xmlhttprequest", AtomString::ConstructFromLiteral)
> {
> }
> 
>diff --git a/Source/WebCore/loader/cache/CachedResourceRequestInitiators.h b/Source/WebCore/loader/cache/CachedResourceRequestInitiators.h
>index 2a4008fe7fdc8d4621edf68632b70997ccee04c7..064a831fb9cd67567fec5e237264850b96924ef3 100644
>--- a/Source/WebCore/loader/cache/CachedResourceRequestInitiators.h
>+++ b/Source/WebCore/loader/cache/CachedResourceRequestInitiators.h
>@@ -26,18 +26,18 @@
> #pragma once
> 
> #include "ThreadGlobalData.h"
>-#include <wtf/text/AtomicString.h>
>+#include <wtf/text/AtomString.h>
> 
> namespace WebCore {
> 
> struct CachedResourceRequestInitiators {
> CachedResourceRequestInitiators();
> 
>- const AtomicString css;
>- const AtomicString eventsource;
>- const AtomicString fetch;
>- const AtomicString icon;
>- const AtomicString xmlhttprequest;
>+ const AtomString css;
>+ const AtomString eventsource;
>+ const AtomString fetch;
>+ const AtomString icon;
>+ const AtomString xmlhttprequest;
> WTF_MAKE_NONCOPYABLE(CachedResourceRequestInitiators); WTF_MAKE_FAST_ALLOCATED;
> private:
> friend class ThreadGlobalData;
>diff --git a/Source/WebCore/loader/cache/CachedSVGFont.cpp b/Source/WebCore/loader/cache/CachedSVGFont.cpp
>index 5ee3fc1850c01e9c82bca2e7a8963aba391dd065..e53bd110bc416cf61b1abec6ab3610102c07e794 100644
>--- a/Source/WebCore/loader/cache/CachedSVGFont.cpp
>+++ b/Source/WebCore/loader/cache/CachedSVGFont.cpp
>@@ -52,7 +52,7 @@ CachedSVGFont::CachedSVGFont(CachedResourceRequest&& request, const PAL::Session
> {
> }
> 
>-RefPtr CachedSVGFont::createFont(const FontDescription& fontDescription, const AtomicString& remoteURI, bool syntheticBold, bool syntheticItalic, const FontFeatureSettings& fontFaceFeatures, const FontVariantSettings& fontFaceVariantSettings, FontSelectionSpecifiedCapabilities fontFaceCapabilities)
>+RefPtr CachedSVGFont::createFont(const FontDescription& fontDescription, const AtomString& remoteURI, bool syntheticBold, bool syntheticItalic, const FontFeatureSettings& fontFaceFeatures, const FontVariantSettings& fontFaceVariantSettings, FontSelectionSpecifiedCapabilities fontFaceCapabilities)
> {
> ASSERT(firstFontFace(remoteURI));
> return CachedFont::createFont(fontDescription, remoteURI, syntheticBold, syntheticItalic, fontFaceFeatures, fontFaceVariantSettings, fontFaceCapabilities);
>@@ -65,7 +65,7 @@ FontPlatformData CachedSVGFont::platformDataFromCustomData(const FontDescription
> return CachedFont::platformDataFromCustomData(fontDescription, bold, italic, fontFaceFeatures, fontFaceVariantSettings, fontFaceCapabilities);
> }
> 
>-bool CachedSVGFont::ensureCustomFontData(const AtomicString& remoteURI)
>+bool CachedSVGFont::ensureCustomFontData(const AtomString& remoteURI)
> {
> if (!m_externalSVGDocument && !errorOccurred() && !isLoading() && m_data) {
> bool sawError = false;
>@@ -114,7 +114,7 @@ SVGFontElement* CachedSVGFont::getSVGFontById(const String& fontName) const
> return nullptr;
> }
> 
>-SVGFontElement* CachedSVGFont::maybeInitializeExternalSVGFontElement(const AtomicString& remoteURI)
>+SVGFontElement* CachedSVGFont::maybeInitializeExternalSVGFontElement(const AtomString& remoteURI)
> {
> if (m_externalSVGFontElement)
> return m_externalSVGFontElement;
>@@ -126,7 +126,7 @@ SVGFontElement* CachedSVGFont::maybeInitializeExternalSVGFontElement(const Atomi
> return m_externalSVGFontElement;
> }
> 
>-SVGFontFaceElement* CachedSVGFont::firstFontFace(const AtomicString& remoteURI)
>+SVGFontFaceElement* CachedSVGFont::firstFontFace(const AtomString& remoteURI)
> {
> if (!maybeInitializeExternalSVGFontElement(remoteURI))
> return nullptr;
>diff --git a/Source/WebCore/loader/cache/CachedSVGFont.h b/Source/WebCore/loader/cache/CachedSVGFont.h
>index 0db63292a9c8345b4e76b2c36e201c160f66d181..42cf134789bf37b60ee850a7178c85250c50d111 100644
>--- a/Source/WebCore/loader/cache/CachedSVGFont.h
>+++ b/Source/WebCore/loader/cache/CachedSVGFont.h
>@@ -37,17 +37,17 @@ class CachedSVGFont final : public CachedFont {
> public:
> CachedSVGFont(CachedResourceRequest&&, const PAL::SessionID&, const CookieJar*);
> 
>- bool ensureCustomFontData(const AtomicString& remoteURI) override;
>+ bool ensureCustomFontData(const AtomString& remoteURI) override;
> 
>- RefPtr createFont(const FontDescription&, const AtomicString& remoteURI, bool syntheticBold, bool syntheticItalic, const FontFeatureSettings&, const FontVariantSettings&, FontSelectionSpecifiedCapabilities) override;
>+ RefPtr createFont(const FontDescription&, const AtomString& remoteURI, bool syntheticBold, bool syntheticItalic, const FontFeatureSettings&, const FontVariantSettings&, FontSelectionSpecifiedCapabilities) override;
> 
> private:
> FontPlatformData platformDataFromCustomData(const FontDescription&, bool bold, bool italic, const FontFeatureSettings&, const FontVariantSettings&, FontSelectionSpecifiedCapabilities);
> 
> SVGFontElement* getSVGFontById(const String&) const;
> 
>- SVGFontElement* maybeInitializeExternalSVGFontElement(const AtomicString& remoteURI);
>- SVGFontFaceElement* firstFontFace(const AtomicString& remoteURI);
>+ SVGFontElement* maybeInitializeExternalSVGFontElement(const AtomString& remoteURI);
>+ SVGFontFaceElement* firstFontFace(const AtomString& remoteURI);
> 
> RefPtr<SharedBuffer> m_convertedFont;
> RefPtr<SVGDocument> m_externalSVGDocument;
>diff --git a/Source/WebCore/mathml/MathMLAnnotationElement.cpp b/Source/WebCore/mathml/MathMLAnnotationElement.cpp
>index 3ff4abbee7ecaee3d3040ba6c14683e0f3ec9f10..7e0e799b02cc367f5255cd418162efeb779ec746 100644
>--- a/Source/WebCore/mathml/MathMLAnnotationElement.cpp
>+++ b/Source/WebCore/mathml/MathMLAnnotationElement.cpp
>@@ -95,7 +95,7 @@ bool MathMLAnnotationElement::childShouldCreateRenderer(const Node& child) const
> return false;
> }
> 
>-void MathMLAnnotationElement::attributeChanged(const QualifiedName& name, const AtomicString& oldValue, const AtomicString& newValue, AttributeModificationReason reason)
>+void MathMLAnnotationElement::attributeChanged(const QualifiedName& name, const AtomString& oldValue, const AtomString& newValue, AttributeModificationReason reason)
> {
> if (name == MathMLNames::srcAttr || name == MathMLNames::encodingAttr) {
> auto* parent = parentElement();
>diff --git a/Source/WebCore/mathml/MathMLAnnotationElement.h b/Source/WebCore/mathml/MathMLAnnotationElement.h
>index 13a267a7e3717c61b7a1f66dce4ec81b69f8caaa..7074606a526d0c3435566d65841cd1a83f6caf08 100644
>--- a/Source/WebCore/mathml/MathMLAnnotationElement.h
>+++ b/Source/WebCore/mathml/MathMLAnnotationElement.h
>@@ -42,7 +42,7 @@ private:
> bool isSemanticAnnotation() const final { return true; }
> 
> bool childShouldCreateRenderer(const Node&) const final;
>- void attributeChanged(const QualifiedName&, const AtomicString& oldValue, const AtomicString& newValue, AttributeModificationReason) final;
>+ void attributeChanged(const QualifiedName&, const AtomString& oldValue, const AtomString& newValue, AttributeModificationReason) final;
> };
> 
> }
>diff --git a/Source/WebCore/mathml/MathMLElement.cpp b/Source/WebCore/mathml/MathMLElement.cpp
>index 95d2182726e9fcfebfcc575999d35025189a74be..ef59d63bd072677097af579926b6ca653d7edcd3 100644
>--- a/Source/WebCore/mathml/MathMLElement.cpp
>+++ b/Source/WebCore/mathml/MathMLElement.cpp
>@@ -74,7 +74,7 @@ unsigned MathMLElement::rowSpan() const
> return std::max(1u, std::min(limitToOnlyHTMLNonNegative(rowSpanValue, 1u), maxRowspan));
> }
> 
>-void MathMLElement::parseAttribute(const QualifiedName& name, const AtomicString& value)
>+void MathMLElement::parseAttribute(const QualifiedName& name, const AtomString& value)
> {
> if (name == hrefAttr) {
> bool wasLink = isLink();
>@@ -98,7 +98,7 @@ bool MathMLElement::isPresentationAttribute(const QualifiedName& name) const
> return StyledElement::isPresentationAttribute(name);
> }
> 
>-static String convertMathSizeIfNeeded(const AtomicString& value)
>+static String convertMathSizeIfNeeded(const AtomString& value)
> {
> if (value == "small")
> return "0.75em";
>@@ -117,7 +117,7 @@ static String convertMathSizeIfNeeded(const AtomicString& value)
> return makeString(FormattedNumber::fixedWidth(unitlessValue * 100, 3), '%');
> }
> 
>-void MathMLElement::collectStyleForPresentationAttribute(const QualifiedName& name, const AtomicString& value, MutableStyleProperties& style)
>+void MathMLElement::collectStyleForPresentationAttribute(const QualifiedName& name, const AtomString& value, MutableStyleProperties& style)
> {
> if (name == mathbackgroundAttr)
> addPropertyToPresentationAttributeStyle(style, CSSPropertyBackgroundColor, value);
>diff --git a/Source/WebCore/mathml/MathMLElement.h b/Source/WebCore/mathml/MathMLElement.h
>index 0679f029e396aba0850dc687b1a31eab5b918a11..1965b1a354bb30a9a0f099728f11ea24818be990 100644
>--- a/Source/WebCore/mathml/MathMLElement.h
>+++ b/Source/WebCore/mathml/MathMLElement.h
>@@ -93,11 +93,11 @@ public:
> protected:
> MathMLElement(const QualifiedName& tagName, Document&);
> 
>- void parseAttribute(const QualifiedName&, const AtomicString&) override;
>+ void parseAttribute(const QualifiedName&, const AtomString&) override;
> bool childShouldCreateRenderer(const Node&) const override;
> 
> bool isPresentationAttribute(const QualifiedName&) const override;
>- void collectStyleForPresentationAttribute(const QualifiedName&, const AtomicString&, MutableStyleProperties&) override;
>+ void collectStyleForPresentationAttribute(const QualifiedName&, const AtomString&, MutableStyleProperties&) override;
> 
> bool willRespondToMouseClickEvents() override;
> void defaultEventHandler(Event&) override;
>diff --git a/Source/WebCore/mathml/MathMLFractionElement.cpp b/Source/WebCore/mathml/MathMLFractionElement.cpp
>index 5311934b1988a8a88fcff751cb0ac3cd0b95446a..bb4add4cbe92561d89bd0ab1523fe4c7c9519dcb 100644
>--- a/Source/WebCore/mathml/MathMLFractionElement.cpp
>+++ b/Source/WebCore/mathml/MathMLFractionElement.cpp
>@@ -103,7 +103,7 @@ MathMLFractionElement::FractionAlignment MathMLFractionElement::denominatorAlign
> return cachedFractionAlignment(denomalignAttr, m_denominatorAlignment);
> }
> 
>-void MathMLFractionElement::parseAttribute(const QualifiedName& name, const AtomicString& value)
>+void MathMLFractionElement::parseAttribute(const QualifiedName& name, const AtomString& value)
> {
> if (name == linethicknessAttr)
> m_lineThickness = WTF::nullopt;
>diff --git a/Source/WebCore/mathml/MathMLFractionElement.h b/Source/WebCore/mathml/MathMLFractionElement.h
>index e20680648cb73dca4514ac52edb72852349a82a3..d8c66a3864b6355f7a8e75147d34b38cf2105e5b 100644
>--- a/Source/WebCore/mathml/MathMLFractionElement.h
>+++ b/Source/WebCore/mathml/MathMLFractionElement.h
>@@ -47,7 +47,7 @@ public:
> private:
> MathMLFractionElement(const QualifiedName& tagName, Document&);
> RenderPtr<RenderElement> createElementRenderer(RenderStyle&&, const RenderTreePosition&) final;
>- void parseAttribute(const QualifiedName&, const AtomicString&) final;
>+ void parseAttribute(const QualifiedName&, const AtomString&) final;
> 
> FractionAlignment cachedFractionAlignment(const QualifiedName&, Optional<FractionAlignment>&);
> 
>diff --git a/Source/WebCore/mathml/MathMLMathElement.cpp b/Source/WebCore/mathml/MathMLMathElement.cpp
>index aeb28dffe4c95cf596f6c88011177eba0e5f013d..d833b48c9a8c590b83d817efaa3534be6dc8c716 100644
>--- a/Source/WebCore/mathml/MathMLMathElement.cpp
>+++ b/Source/WebCore/mathml/MathMLMathElement.cpp
>@@ -69,7 +69,7 @@ Optional<bool> MathMLMathElement::specifiedDisplayStyle()
> return toOptionalBool(m_displayStyle.value());
> }
> 
>-void MathMLMathElement::parseAttribute(const QualifiedName& name, const AtomicString& value)
>+void MathMLMathElement::parseAttribute(const QualifiedName& name, const AtomString& value)
> {
> bool displayStyleAttribute = (name == displaystyleAttr || name == displayAttr);
> bool mathVariantAttribute = name == mathvariantAttr;
>diff --git a/Source/WebCore/mathml/MathMLMathElement.h b/Source/WebCore/mathml/MathMLMathElement.h
>index d7d0a69732013b563dc934839e04d1799c3d2099..f9a0a7fe2be70fccab7d9908a5b1769a5229ef52 100644
>--- a/Source/WebCore/mathml/MathMLMathElement.h
>+++ b/Source/WebCore/mathml/MathMLMathElement.h
>@@ -40,7 +40,7 @@ public:
> 
> private:
> MathMLMathElement(const QualifiedName& tagName, Document&);
>- void parseAttribute(const QualifiedName&, const AtomicString&) final;
>+ void parseAttribute(const QualifiedName&, const AtomString&) final;
> void didAttachRenderers() final;
> 
> bool acceptsDisplayStyleAttribute() final { return true; }
>diff --git a/Source/WebCore/mathml/MathMLMencloseElement.cpp b/Source/WebCore/mathml/MathMLMencloseElement.cpp
>index f6444f8a10873300761908c33674d50abcfd734a..cc849fe8ebf2ef52b3d1c46fc57790d32c7f19ac 100644
>--- a/Source/WebCore/mathml/MathMLMencloseElement.cpp
>+++ b/Source/WebCore/mathml/MathMLMencloseElement.cpp
>@@ -132,7 +132,7 @@ bool MathMLMencloseElement::hasNotation(MencloseNotationFlag notationFlag)
> return m_notationFlags.value() & notationFlag;
> }
> 
>-void MathMLMencloseElement::parseAttribute(const QualifiedName& name, const AtomicString& value)
>+void MathMLMencloseElement::parseAttribute(const QualifiedName& name, const AtomString& value)
> {
> if (name == notationAttr)
> m_notationFlags = WTF::nullopt;
>diff --git a/Source/WebCore/mathml/MathMLMencloseElement.h b/Source/WebCore/mathml/MathMLMencloseElement.h
>index 57e0de6ecee80b0417ff8018eb70fe2fb2c63ed8..a0e32a81fc0de2c6911fddcde7aa04d30c1e9d13 100644
>--- a/Source/WebCore/mathml/MathMLMencloseElement.h
>+++ b/Source/WebCore/mathml/MathMLMencloseElement.h
>@@ -59,7 +59,7 @@ public:
> private:
> MathMLMencloseElement(const QualifiedName&, Document&);
> RenderPtr<RenderElement> createElementRenderer(RenderStyle&&, const RenderTreePosition&) final;
>- void parseAttribute(const QualifiedName&, const AtomicString&) final;
>+ void parseAttribute(const QualifiedName&, const AtomString&) final;
> void parseNotationAttribute();
> void clearNotations() { m_notationFlags = 0; }
> void addNotation(MencloseNotationFlag notationFlag) { m_notationFlags.value() |= notationFlag; }
>diff --git a/Source/WebCore/mathml/MathMLOperatorElement.cpp b/Source/WebCore/mathml/MathMLOperatorElement.cpp
>index 7f00dadf487172ab08688b735ee74487a07603ee..7a7b43be509d7f9741ab268eb2b81501fa9c469c 100644
>--- a/Source/WebCore/mathml/MathMLOperatorElement.cpp
>+++ b/Source/WebCore/mathml/MathMLOperatorElement.cpp
>@@ -201,7 +201,7 @@ const MathMLElement::Length& MathMLOperatorElement::maxSize()
> if (m_maxSize)
> return m_maxSize.value();
> 
>- const AtomicString& value = attributeWithoutSynchronization(MathMLNames::maxsizeAttr);
>+ const AtomString& value = attributeWithoutSynchronization(MathMLNames::maxsizeAttr);
> if (value == "infinity") {
> Length maxsize;
> maxsize.type = LengthType::Infinity;
>@@ -239,7 +239,7 @@ static Optional<MathMLOperatorDictionary::Flag> attributeNameToPropertyFlag(cons
> return WTF::nullopt;
> }
> 
>-void MathMLOperatorElement::parseAttribute(const QualifiedName& name, const AtomicString& value)
>+void MathMLOperatorElement::parseAttribute(const QualifiedName& name, const AtomString& value)
> {
> if (name == formAttr) {
> m_dictionaryProperty = WTF::nullopt;
>diff --git a/Source/WebCore/mathml/MathMLOperatorElement.h b/Source/WebCore/mathml/MathMLOperatorElement.h
>index e20ded871cc374c31e8672060103c7a4fb62718c..c7d8d669bfc60c3e193f54bc089d6b763822aa87 100644
>--- a/Source/WebCore/mathml/MathMLOperatorElement.h
>+++ b/Source/WebCore/mathml/MathMLOperatorElement.h
>@@ -56,7 +56,7 @@ private:
> MathMLOperatorElement(const QualifiedName& tagName, Document&);
> RenderPtr<RenderElement> createElementRenderer(RenderStyle&&, const RenderTreePosition&) final;
> void childrenChanged(const ChildChange&) final;
>- void parseAttribute(const QualifiedName&, const AtomicString&) final;
>+ void parseAttribute(const QualifiedName&, const AtomString&) final;
> 
> Optional<OperatorChar> m_operatorChar;
> 
>diff --git a/Source/WebCore/mathml/MathMLPaddedElement.cpp b/Source/WebCore/mathml/MathMLPaddedElement.cpp
>index 6e42866bb07dcc9ad26271b32d38a1a289fadcf3..f759459b9253495cc9756b12ab7eb9d74b34bfed 100644
>--- a/Source/WebCore/mathml/MathMLPaddedElement.cpp
>+++ b/Source/WebCore/mathml/MathMLPaddedElement.cpp
>@@ -73,7 +73,7 @@ const MathMLElement::Length& MathMLPaddedElement::voffset()
> return cachedMathMLLength(MathMLNames::voffsetAttr, m_voffset);
> }
> 
>-void MathMLPaddedElement::parseAttribute(const QualifiedName& name, const AtomicString& value)
>+void MathMLPaddedElement::parseAttribute(const QualifiedName& name, const AtomString& value)
> {
> if (name == widthAttr)
> m_width = WTF::nullopt;
>diff --git a/Source/WebCore/mathml/MathMLPaddedElement.h b/Source/WebCore/mathml/MathMLPaddedElement.h
>index e1c23ba48d400bbebdcdaa2b409573d44c2130f6..5972c48dbca05e4c8cbb2bfc3dcd6d492f2b4266 100644
>--- a/Source/WebCore/mathml/MathMLPaddedElement.h
>+++ b/Source/WebCore/mathml/MathMLPaddedElement.h
>@@ -44,7 +44,7 @@ public:
> private:
> MathMLPaddedElement(const QualifiedName& tagName, Document&);
> RenderPtr<RenderElement> createElementRenderer(RenderStyle&&, const RenderTreePosition&) final;
>- void parseAttribute(const QualifiedName&, const AtomicString&) final;
>+ void parseAttribute(const QualifiedName&, const AtomString&) final;
> 
> Optional<Length> m_width;
> Optional<Length> m_height;
>diff --git a/Source/WebCore/mathml/MathMLPresentationElement.cpp b/Source/WebCore/mathml/MathMLPresentationElement.cpp
>index 7bbbbfb6078decaf3a966bcc8957caee7dad6763..36c1daeb108736805127690ca47800a51edb59fd 100644
>--- a/Source/WebCore/mathml/MathMLPresentationElement.cpp
>+++ b/Source/WebCore/mathml/MathMLPresentationElement.cpp
>@@ -191,7 +191,7 @@ const MathMLElement::BooleanValue& MathMLPresentationElement::cachedBooleanAttri
> return attribute.value();
> 
> // In MathML, attribute values are case-sensitive.
>- const AtomicString& value = attributeWithoutSynchronization(name);
>+ const AtomString& value = attributeWithoutSynchronization(name);
> if (value == "true")
> attribute = BooleanValue::True;
> else if (value == "false")
>@@ -331,7 +331,7 @@ Optional<bool> MathMLPresentationElement::specifiedDisplayStyle()
> return toOptionalBool(specifiedDisplayStyle);
> }
> 
>-MathMLElement::MathVariant MathMLPresentationElement::parseMathVariantAttribute(const AtomicString& attributeValue)
>+MathMLElement::MathVariant MathMLPresentationElement::parseMathVariantAttribute(const AtomString& attributeValue)
> {
> // The mathvariant attribute values is case-sensitive.
> if (attributeValue == "normal")
>@@ -382,7 +382,7 @@ Optional<MathMLElement::MathVariant> MathMLPresentationElement::specifiedMathVar
> return m_mathVariant.value() == MathVariant::None ? WTF::nullopt : m_mathVariant;
> }
> 
>-void MathMLPresentationElement::parseAttribute(const QualifiedName& name, const AtomicString& value)
>+void MathMLPresentationElement::parseAttribute(const QualifiedName& name, const AtomString& value)
> {
> bool displayStyleAttribute = name == displaystyleAttr && acceptsDisplayStyleAttribute();
> bool mathVariantAttribute = name == mathvariantAttr && acceptsMathVariantAttribute();
>diff --git a/Source/WebCore/mathml/MathMLPresentationElement.h b/Source/WebCore/mathml/MathMLPresentationElement.h
>index c538a1e8b63501f665559cb7bb44e38e4f53392e..45519cf40667d407a31a5710c7ca3ada8ad6399f 100644
>--- a/Source/WebCore/mathml/MathMLPresentationElement.h
>+++ b/Source/WebCore/mathml/MathMLPresentationElement.h
>@@ -40,7 +40,7 @@ public:
> 
> protected:
> MathMLPresentationElement(const QualifiedName& tagName, Document&);
>- void parseAttribute(const QualifiedName&, const AtomicString&) override;
>+ void parseAttribute(const QualifiedName&, const AtomString&) override;
> 
> static bool isPhrasingContent(const Node&);
> static bool isFlowContent(const Node&);
>@@ -66,7 +66,7 @@ private:
> 
> static Length parseNumberAndUnit(const StringView&);
> static Length parseNamedSpace(const StringView&);
>- static MathVariant parseMathVariantAttribute(const AtomicString& attributeValue);
>+ static MathVariant parseMathVariantAttribute(const AtomString& attributeValue);
> };
> 
> }
>diff --git a/Source/WebCore/mathml/MathMLScriptsElement.cpp b/Source/WebCore/mathml/MathMLScriptsElement.cpp
>index d22228cc5130a5e1792f3b7dc6a62be33079ec2f..d8cbb22546b7f5c1faafeb18b48fdce06b5d45cb 100644
>--- a/Source/WebCore/mathml/MathMLScriptsElement.cpp
>+++ b/Source/WebCore/mathml/MathMLScriptsElement.cpp
>@@ -77,7 +77,7 @@ const MathMLElement::Length& MathMLScriptsElement::superscriptShift()
> return cachedMathMLLength(superscriptshiftAttr, m_superscriptShift);
> }
> 
>-void MathMLScriptsElement::parseAttribute(const QualifiedName& name, const AtomicString& value)
>+void MathMLScriptsElement::parseAttribute(const QualifiedName& name, const AtomString& value)
> {
> if (name == subscriptshiftAttr)
> m_subscriptShift = WTF::nullopt;
>diff --git a/Source/WebCore/mathml/MathMLScriptsElement.h b/Source/WebCore/mathml/MathMLScriptsElement.h
>index e4fb5428e2ec3f7b4ee593654b1169fec9dddeaa..43dc4fc9f27152dd77c6b5efce5f45ce1fe9639b 100644
>--- a/Source/WebCore/mathml/MathMLScriptsElement.h
>+++ b/Source/WebCore/mathml/MathMLScriptsElement.h
>@@ -46,7 +46,7 @@ protected:
> 
> private:
> RenderPtr<RenderElement> createElementRenderer(RenderStyle&&, const RenderTreePosition&) override;
>- void parseAttribute(const QualifiedName&, const AtomicString&) override;
>+ void parseAttribute(const QualifiedName&, const AtomString&) override;
> 
> const ScriptType m_scriptType;
> Optional<Length> m_subscriptShift;
>diff --git a/Source/WebCore/mathml/MathMLSelectElement.cpp b/Source/WebCore/mathml/MathMLSelectElement.cpp
>index b4a4ae83078c965e404ab88697efc35fae673cad..80aea10d00ccf9e47ea39d84e17170cc91d6ee87 100644
>--- a/Source/WebCore/mathml/MathMLSelectElement.cpp
>+++ b/Source/WebCore/mathml/MathMLSelectElement.cpp
>@@ -68,17 +68,17 @@ RenderPtr<RenderElement> MathMLSelectElement::createElementRenderer(RenderStyle&
> // - Other MIME Content-Types for MathML, SVG and HTML.
> //
> // We exclude "application/mathml+xml" which is ambiguous about whether it is Presentation or Content MathML. Authors must use a more explicit encoding value.
>-bool MathMLSelectElement::isMathMLEncoding(const AtomicString& value)
>+bool MathMLSelectElement::isMathMLEncoding(const AtomString& value)
> {
> return value == "application/mathml-presentation+xml" || value == "MathML-Presentation";
> }
> 
>-bool MathMLSelectElement::isSVGEncoding(const AtomicString& value)
>+bool MathMLSelectElement::isSVGEncoding(const AtomString& value)
> {
> return value == "image/svg+xml" || value == "SVG1.1";
> }
> 
>-bool MathMLSelectElement::isHTMLEncoding(const AtomicString& value)
>+bool MathMLSelectElement::isHTMLEncoding(const AtomString& value)
> {
> return value == "application/xhtml+xml" || value == "text/html";
> }
>@@ -100,7 +100,7 @@ void MathMLSelectElement::childrenChanged(const ChildChange& change)
> MathMLRowElement::childrenChanged(change);
> }
> 
>-void MathMLSelectElement::attributeChanged(const QualifiedName& name, const AtomicString& oldValue, const AtomicString& newValue, AttributeModificationReason reason)
>+void MathMLSelectElement::attributeChanged(const QualifiedName& name, const AtomString& oldValue, const AtomString& newValue, AttributeModificationReason reason)
> {
> if (hasTagName(mactionTag) && (name == MathMLNames::actiontypeAttr || name == MathMLNames::selectionAttr))
> updateSelectedChild();
>@@ -240,7 +240,7 @@ void MathMLSelectElement::toggle()
> 
> // We update the attribute value of the selection attribute.
> // This will also call MathMLSelectElement::attributeChanged to update the selected child.
>- setAttributeWithoutSynchronization(MathMLNames::selectionAttr, AtomicString::number(newSelectedChildIndex));
>+ setAttributeWithoutSynchronization(MathMLNames::selectionAttr, AtomString::number(newSelectedChildIndex));
> }
> 
> }
>diff --git a/Source/WebCore/mathml/MathMLSelectElement.h b/Source/WebCore/mathml/MathMLSelectElement.h
>index f7a0d21e38fa6a47811911b09b74a1a1c306d756..07c488ec42a041c431b15e283e5e70116aa6e76b 100644
>--- a/Source/WebCore/mathml/MathMLSelectElement.h
>+++ b/Source/WebCore/mathml/MathMLSelectElement.h
>@@ -35,9 +35,9 @@ class MathMLSelectElement final : public MathMLRowElement {
> WTF_MAKE_ISO_ALLOCATED(MathMLSelectElement);
> public:
> static Ref<MathMLSelectElement> create(const QualifiedName& tagName, Document&);
>- static bool isMathMLEncoding(const AtomicString& value);
>- static bool isSVGEncoding(const AtomicString& value);
>- static bool isHTMLEncoding(const AtomicString& value);
>+ static bool isMathMLEncoding(const AtomString& value);
>+ static bool isSVGEncoding(const AtomString& value);
>+ static bool isHTMLEncoding(const AtomString& value);
> 
> private:
> MathMLSelectElement(const QualifiedName& tagName, Document&);
>@@ -47,7 +47,7 @@ private:
> 
> void finishParsingChildren() final;
> void childrenChanged(const ChildChange&) final;
>- void attributeChanged(const QualifiedName&, const AtomicString& oldValue, const AtomicString& newValue, AttributeModificationReason = ModifiedDirectly) final;
>+ void attributeChanged(const QualifiedName&, const AtomString& oldValue, const AtomString& newValue, AttributeModificationReason = ModifiedDirectly) final;
> void defaultEventHandler(Event&) final;
> bool willRespondToMouseClickEvents() final;
> 
>diff --git a/Source/WebCore/mathml/MathMLSpaceElement.cpp b/Source/WebCore/mathml/MathMLSpaceElement.cpp
>index 4ab1a0556db8fe4523abf58ae3aec0ba2462b65a..ccd788615e338edb75ae4c34b18fa105c845a868 100644
>--- a/Source/WebCore/mathml/MathMLSpaceElement.cpp
>+++ b/Source/WebCore/mathml/MathMLSpaceElement.cpp
>@@ -63,7 +63,7 @@ const MathMLElement::Length& MathMLSpaceElement::depth()
> return cachedMathMLLength(MathMLNames::depthAttr, m_depth);
> }
> 
>-void MathMLSpaceElement::parseAttribute(const QualifiedName& name, const AtomicString& value)
>+void MathMLSpaceElement::parseAttribute(const QualifiedName& name, const AtomString& value)
> {
> if (name == widthAttr)
> m_width = WTF::nullopt;
>diff --git a/Source/WebCore/mathml/MathMLSpaceElement.h b/Source/WebCore/mathml/MathMLSpaceElement.h
>index 8a85acb4baf392b74fd1af962fbbd4ec86af3f1d..c12808d491ea0e664b3a92a432c9237d77b85ddd 100644
>--- a/Source/WebCore/mathml/MathMLSpaceElement.h
>+++ b/Source/WebCore/mathml/MathMLSpaceElement.h
>@@ -41,7 +41,7 @@ public:
> private:
> MathMLSpaceElement(const QualifiedName& tagName, Document&);
> RenderPtr<RenderElement> createElementRenderer(RenderStyle&&, const RenderTreePosition&) final;
>- void parseAttribute(const QualifiedName&, const AtomicString&) final;
>+ void parseAttribute(const QualifiedName&, const AtomString&) final;
> 
> bool acceptsDisplayStyleAttribute() final { return false; }
> 
>diff --git a/Source/WebCore/mathml/MathMLUnderOverElement.cpp b/Source/WebCore/mathml/MathMLUnderOverElement.cpp
>index 0c1dfeab957a9968e3ebbe3d967ff90f0654608f..539fbd85cf86aaf723eeefb073c7fe0d9a0fe278 100644
>--- a/Source/WebCore/mathml/MathMLUnderOverElement.cpp
>+++ b/Source/WebCore/mathml/MathMLUnderOverElement.cpp
>@@ -58,7 +58,7 @@ const MathMLElement::BooleanValue& MathMLUnderOverElement::accentUnder()
> return cachedBooleanAttribute(accentunderAttr, m_accentUnder);
> }
> 
>-void MathMLUnderOverElement::parseAttribute(const QualifiedName& name, const AtomicString& value)
>+void MathMLUnderOverElement::parseAttribute(const QualifiedName& name, const AtomString& value)
> {
> if (name == accentAttr)
> m_accent = WTF::nullopt;
>diff --git a/Source/WebCore/mathml/MathMLUnderOverElement.h b/Source/WebCore/mathml/MathMLUnderOverElement.h
>index bd64fa4c9581559207dee07c49987f46c7dfc54b..f63402f0d762f4a086c32495895cd44c73a72c23 100644
>--- a/Source/WebCore/mathml/MathMLUnderOverElement.h
>+++ b/Source/WebCore/mathml/MathMLUnderOverElement.h
>@@ -41,7 +41,7 @@ public:
> private:
> MathMLUnderOverElement(const QualifiedName& tagName, Document&);
> RenderPtr<RenderElement> createElementRenderer(RenderStyle&&, const RenderTreePosition&) final;
>- void parseAttribute(const QualifiedName&, const AtomicString&) final;
>+ void parseAttribute(const QualifiedName&, const AtomString&) final;
> 
> Optional<BooleanValue> m_accent;
> Optional<BooleanValue> m_accentUnder;
>diff --git a/Source/WebCore/page/DOMWindow.cpp b/Source/WebCore/page/DOMWindow.cpp
>index cfcbb1d821ace8cebfbb3e28f3af51f4fcc7d516..29476b00b7e5cacd29f8a4517c2d5287bcbf39b0 100644
>--- a/Source/WebCore/page/DOMWindow.cpp
>+++ b/Source/WebCore/page/DOMWindow.cpp
>@@ -1810,7 +1810,7 @@ bool DOMWindow::isSameSecurityOriginAsMainFrame() const
> return false;
> }
> 
>-bool DOMWindow::addEventListener(const AtomicString& eventType, Ref<EventListener>&& listener, const AddEventListenerOptions& options)
>+bool DOMWindow::addEventListener(const AtomString& eventType, Ref<EventListener>&& listener, const AddEventListenerOptions& options)
> {
> if (!EventTarget::addEventListener(eventType, WTFMove(listener), options))
> return false;
>@@ -2031,7 +2031,7 @@ void DOMWindow::resetAllGeolocationPermission()
> #endif
> }
> 
>-bool DOMWindow::removeEventListener(const AtomicString& eventType, EventListener& listener, const ListenerOptions& options)
>+bool DOMWindow::removeEventListener(const AtomString& eventType, EventListener& listener, const ListenerOptions& options)
> {
> if (!EventTarget::removeEventListener(eventType, listener, options.capture))
> return false;
>@@ -2313,7 +2313,7 @@ bool DOMWindow::isInsecureScriptAccess(DOMWindow& activeWindow, const String& ur
> return true;
> }
> 
>-ExceptionOr<RefPtr<Frame>> DOMWindow::createWindow(const String& urlString, const AtomicString& frameName, const WindowFeatures& windowFeatures, DOMWindow& activeWindow, Frame& firstFrame, Frame& openerFrame, const WTF::Function<void(DOMWindow&)>& prepareDialogFunction)
>+ExceptionOr<RefPtr<Frame>> DOMWindow::createWindow(const String& urlString, const AtomString& frameName, const WindowFeatures& windowFeatures, DOMWindow& activeWindow, Frame& firstFrame, Frame& openerFrame, const WTF::Function<void(DOMWindow&)>& prepareDialogFunction)
> {
> Frame* activeFrame = activeWindow.frame();
> if (!activeFrame)
>@@ -2372,7 +2372,7 @@ ExceptionOr<RefPtr<Frame>> DOMWindow::createWindow(const String& urlString, cons
> return noopener ? RefPtr<Frame> { nullptr } : newFrame;
> }
> 
>-ExceptionOr<RefPtr<WindowProxy>> DOMWindow::open(DOMWindow& activeWindow, DOMWindow& firstWindow, const String& urlString, const AtomicString& frameName, const String& windowFeaturesString)
>+ExceptionOr<RefPtr<WindowProxy>> DOMWindow::open(DOMWindow& activeWindow, DOMWindow& firstWindow, const String& urlString, const AtomString& frameName, const String& windowFeaturesString)
> {
> if (!isCurrentlyDisplayedInFrame())
> return RefPtr<WindowProxy> { nullptr };
>diff --git a/Source/WebCore/page/DOMWindow.h b/Source/WebCore/page/DOMWindow.h
>index fac795476e6e9a55e8c78dbd8574ddac5e5c2071..6e562a901d00d5f69ac07f3313aeb9261d9cc4dd 100644
>--- a/Source/WebCore/page/DOMWindow.h
>+++ b/Source/WebCore/page/DOMWindow.h
>@@ -177,7 +177,7 @@ public:
> void print();
> void stop();
> 
>- WEBCORE_EXPORT ExceptionOr<RefPtr<WindowProxy>> open(DOMWindow& activeWindow, DOMWindow& firstWindow, const String& urlString, const AtomicString& frameName, const String& windowFeaturesString);
>+ WEBCORE_EXPORT ExceptionOr<RefPtr<WindowProxy>> open(DOMWindow& activeWindow, DOMWindow& firstWindow, const String& urlString, const AtomString& frameName, const String& windowFeaturesString);
> 
> void showModalDialog(const String& urlString, const String& dialogFeaturesString, DOMWindow& activeWindow, DOMWindow& firstWindow, const WTF::Function<void(DOMWindow&)>& prepareDialogFunction);
> 
>@@ -282,8 +282,8 @@ public:
> 
> // Events
> // EventTarget API
>- bool addEventListener(const AtomicString& eventType, Ref<EventListener>&&, const AddEventListenerOptions&) final;
>- bool removeEventListener(const AtomicString& eventType, EventListener&, const ListenerOptions&) final;
>+ bool addEventListener(const AtomString& eventType, Ref<EventListener>&&, const AddEventListenerOptions&) final;
>+ bool removeEventListener(const AtomString& eventType, EventListener&, const ListenerOptions&) final;
> void removeAllEventListeners() final;
> 
> using EventTarget::dispatchEvent;
>@@ -377,7 +377,7 @@ private:
> Page* page();
> bool allowedToChangeWindowGeometry() const;
> 
>- static ExceptionOr<RefPtr<Frame>> createWindow(const String& urlString, const AtomicString& frameName, const WindowFeatures&, DOMWindow& activeWindow, Frame& firstFrame, Frame& openerFrame, const WTF::Function<void(DOMWindow&)>& prepareDialogFunction = nullptr);
>+ static ExceptionOr<RefPtr<Frame>> createWindow(const String& urlString, const AtomString& frameName, const WindowFeatures&, DOMWindow& activeWindow, Frame& firstFrame, Frame& openerFrame, const WTF::Function<void(DOMWindow&)>& prepareDialogFunction = nullptr);
> bool isInsecureScriptAccess(DOMWindow& activeWindow, const String& urlString);
> 
> #if ENABLE(DEVICE_ORIENTATION)
>diff --git a/Source/WebCore/page/EventHandler.cpp b/Source/WebCore/page/EventHandler.cpp
>index a1f85110a0e81d0fa4a8538dfea35f0ed832f75e..a30c9e9437e75a0b25ee7d8530855b25a54a08be 100644
>--- a/Source/WebCore/page/EventHandler.cpp
>+++ b/Source/WebCore/page/EventHandler.cpp
>@@ -2248,7 +2248,7 @@ bool EventHandler::handlePasteGlobalSelection(const PlatformMouseEvent& platform
> 
> #if ENABLE(DRAG_SUPPORT)
> 
>-bool EventHandler::dispatchDragEvent(const AtomicString& eventType, Element& dragTarget, const PlatformMouseEvent& event, DataTransfer& dataTransfer)
>+bool EventHandler::dispatchDragEvent(const AtomString& eventType, Element& dragTarget, const PlatformMouseEvent& event, DataTransfer& dataTransfer)
> {
> Ref<Frame> protectedFrame(m_frame);
> FrameView* view = m_frame.view();
>@@ -2343,7 +2343,7 @@ static bool findDropZone(Node& target, DataTransfer& dataTransfer)
> return false;
> }
> 
>-EventHandler::DragTargetResponse EventHandler::dispatchDragEnterOrDragOverEvent(const AtomicString& eventType, Element& target, const PlatformMouseEvent& event,
>+EventHandler::DragTargetResponse EventHandler::dispatchDragEnterOrDragOverEvent(const AtomString& eventType, Element& target, const PlatformMouseEvent& event,
> std::unique_ptr<Pasteboard>&& pasteboard, DragOperation sourceOperation, bool draggingFiles)
> {
> auto dataTransfer = DataTransfer::createForUpdatingDropTarget(target.document(), WTFMove(pasteboard), sourceOperation, draggingFiles);
>@@ -2489,7 +2489,7 @@ MouseEventWithHitTestResults EventHandler::prepareMouseEvent(const HitTestReques
> return m_frame.document()->prepareMouseEvent(request, documentPointForWindowPoint(m_frame, mouseEvent.position()), mouseEvent);
> }
> 
>-static bool hierarchyHasCapturingEventListeners(Element* element, const AtomicString& pointerEventName, const AtomicString& compatibilityMouseEventName)
>+static bool hierarchyHasCapturingEventListeners(Element* element, const AtomString& pointerEventName, const AtomString& compatibilityMouseEventName)
> {
> for (ContainerNode* curr = element; curr; curr = curr->parentInComposedTree()) {
> if (curr->hasCapturingEventListeners(pointerEventName) || curr->hasCapturingEventListeners(compatibilityMouseEventName))
>@@ -2603,7 +2603,7 @@ void EventHandler::updateMouseEventTargetNode(Node* targetNode, const PlatformMo
> }
> }
> 
>-bool EventHandler::dispatchMouseEvent(const AtomicString& eventType, Node* targetNode, bool /*cancelable*/, int clickCount, const PlatformMouseEvent& platformMouseEvent, bool setUnder)
>+bool EventHandler::dispatchMouseEvent(const AtomString& eventType, Node* targetNode, bool /*cancelable*/, int clickCount, const PlatformMouseEvent& platformMouseEvent, bool setUnder)
> {
> Ref<Frame> protectedFrame(m_frame);
> 
>@@ -3355,12 +3355,12 @@ bool EventHandler::internalKeyEvent(const PlatformKeyboardEvent& initialKeyEvent
> return keydownResult || keypress->defaultPrevented() || keypress->defaultHandled();
> }
> 
>-static FocusDirection focusDirectionForKey(const AtomicString& keyIdentifier)
>+static FocusDirection focusDirectionForKey(const AtomString& keyIdentifier)
> {
>- static NeverDestroyed<AtomicString> Down("Down", AtomicString::ConstructFromLiteral);
>- static NeverDestroyed<AtomicString> Up("Up", AtomicString::ConstructFromLiteral);
>- static NeverDestroyed<AtomicString> Left("Left", AtomicString::ConstructFromLiteral);
>- static NeverDestroyed<AtomicString> Right("Right", AtomicString::ConstructFromLiteral);
>+ static NeverDestroyed<AtomString> Down("Down", AtomString::ConstructFromLiteral);
>+ static NeverDestroyed<AtomString> Up("Up", AtomString::ConstructFromLiteral);
>+ static NeverDestroyed<AtomString> Left("Left", AtomString::ConstructFromLiteral);
>+ static NeverDestroyed<AtomString> Right("Right", AtomString::ConstructFromLiteral);
> 
> FocusDirection retVal = FocusDirectionNone;
> 
>@@ -3637,7 +3637,7 @@ void EventHandler::updateDragStateAfterEditDragIfNeeded(Element& rootEditableEle
> dragState().source = &rootEditableElement;
> }
> 
>-void EventHandler::dispatchDragSrcEvent(const AtomicString& eventType, const PlatformMouseEvent& event)
>+void EventHandler::dispatchDragSrcEvent(const AtomString& eventType, const PlatformMouseEvent& event)
> {
> ASSERT(dragState().dataTransfer);
> dispatchDragEvent(eventType, *dragState().source, event, *dragState().dataTransfer);
>@@ -4026,7 +4026,7 @@ void EventHandler::updateLastScrollbarUnderMouse(Scrollbar* scrollbar, SetOrClea
> }
> 
> #if ENABLE(TOUCH_EVENTS) && !ENABLE(IOS_TOUCH_EVENTS)
>-static const AtomicString& eventNameForTouchPointState(PlatformTouchPoint::State state)
>+static const AtomString& eventNameForTouchPointState(PlatformTouchPoint::State state)
> {
> switch (state) {
> case PlatformTouchPoint::TouchReleased:
>@@ -4240,7 +4240,7 @@ bool EventHandler::handleTouchEvent(const PlatformTouchEvent& event)
> // When sending a touch cancel event, use empty touches and targetTouches lists.
> bool isTouchCancelEvent = (state == PlatformTouchPoint::TouchCancelled);
> RefPtr<TouchList>& effectiveTouches(isTouchCancelEvent ? emptyList : touches);
>- const AtomicString& stateName(eventNameForTouchPointState(static_cast<PlatformTouchPoint::State>(state)));
>+ const AtomString& stateName(eventNameForTouchPointState(static_cast<PlatformTouchPoint::State>(state)));
> 
> for (auto& target : changedTouches[state].m_targets) {
> ASSERT(is<Node>(target));
>diff --git a/Source/WebCore/page/EventHandler.h b/Source/WebCore/page/EventHandler.h
>index 2bd3deb72c20fb2dbf4d9d191460a12a1c584f1a..34149e11cbe5d26a42eb50ae805652d7f115b66c 100644
>--- a/Source/WebCore/page/EventHandler.h
>+++ b/Source/WebCore/page/EventHandler.h
>@@ -226,16 +226,16 @@ public:
> #endif
> 
> #if ENABLE(IOS_TOUCH_EVENTS)
>- bool dispatchTouchEvent(const PlatformTouchEvent&, const AtomicString&, const EventTargetTouchMap&, float, float);
>+ bool dispatchTouchEvent(const PlatformTouchEvent&, const AtomString&, const EventTargetTouchMap&, float, float);
> bool dispatchSimulatedTouchEvent(IntPoint location);
> Frame* touchEventTargetSubframe() const { return m_touchEventTargetSubframe.get(); }
> const TouchArray& touches() const { return m_touches; }
> #endif
> 
> #if ENABLE(IOS_GESTURE_EVENTS)
>- bool dispatchGestureEvent(const PlatformTouchEvent&, const AtomicString&, const EventTargetSet&, float, float);
>+ bool dispatchGestureEvent(const PlatformTouchEvent&, const AtomString&, const EventTargetSet&, float, float);
> #elif ENABLE(MAC_GESTURE_EVENTS)
>- bool dispatchGestureEvent(const PlatformGestureEvent&, const AtomicString&, const EventTargetSet&, float, float);
>+ bool dispatchGestureEvent(const PlatformGestureEvent&, const AtomString&, const EventTargetSet&, float, float);
> WEBCORE_EXPORT bool handleGestureEvent(const PlatformGestureEvent&);
> #endif
> 
>@@ -412,11 +412,11 @@ private:
> 
> MouseEventWithHitTestResults prepareMouseEvent(const HitTestRequest&, const PlatformMouseEvent&);
> 
>- bool dispatchMouseEvent(const AtomicString& eventType, Node* target, bool cancelable, int clickCount, const PlatformMouseEvent&, bool setUnder);
>+ bool dispatchMouseEvent(const AtomString& eventType, Node* target, bool cancelable, int clickCount, const PlatformMouseEvent&, bool setUnder);
> 
> #if ENABLE(DRAG_SUPPORT)
>- bool dispatchDragEvent(const AtomicString& eventType, Element& target, const PlatformMouseEvent&, DataTransfer&);
>- DragTargetResponse dispatchDragEnterOrDragOverEvent(const AtomicString& eventType, Element& target, const PlatformMouseEvent&, std::unique_ptr<Pasteboard>&& , DragOperation, bool draggingFiles);
>+ bool dispatchDragEvent(const AtomString& eventType, Element& target, const PlatformMouseEvent&, DataTransfer&);
>+ DragTargetResponse dispatchDragEnterOrDragOverEvent(const AtomString& eventType, Element& target, const PlatformMouseEvent&, std::unique_ptr<Pasteboard>&& , DragOperation, bool draggingFiles);
> void invalidateDataTransfer();
> 
> bool handleDrag(const MouseEventWithHitTestResults&, CheckDragHysteresis);
>@@ -427,7 +427,7 @@ private:
> #if ENABLE(DRAG_SUPPORT)
> void clearDragState();
> 
>- void dispatchDragSrcEvent(const AtomicString& eventType, const PlatformMouseEvent&);
>+ void dispatchDragSrcEvent(const AtomString& eventType, const PlatformMouseEvent&);
> bool dispatchDragStartEventOnSourceElement(DataTransfer&);
> 
> bool dragHysteresisExceeded(const FloatPoint&) const;
>diff --git a/Source/WebCore/page/EventSource.h b/Source/WebCore/page/EventSource.h
>index dd67cc3731361eff610d2a51b36b80998ea89f0e..9413b6ab334ec96d8d8843db13f38f71c6658d4c 100644
>--- a/Source/WebCore/page/EventSource.h
>+++ b/Source/WebCore/page/EventSource.h
>@@ -112,7 +112,7 @@ private:
> bool m_discardTrailingNewline { false };
> bool m_requestInFlight { false };
> 
>- AtomicString m_eventName;
>+ AtomString m_eventName;
> Vector<UChar> m_data;
> String m_currentlyParsedEventId;
> String m_lastEventId;
>diff --git a/Source/WebCore/page/FrameTree.cpp b/Source/WebCore/page/FrameTree.cpp
>index 24511da24b0da9e52b55781825fba5775a82021a..f875ff36b29cf1bbf86633c5f8f357b84bf86f80 100644
>--- a/Source/WebCore/page/FrameTree.cpp
>+++ b/Source/WebCore/page/FrameTree.cpp
>@@ -42,7 +42,7 @@ FrameTree::~FrameTree()
> child->setView(nullptr);
> }
> 
>-void FrameTree::setName(const AtomicString& name) 
>+void FrameTree::setName(const AtomString& name) 
> {
> m_name = name;
> if (!parent()) {
>@@ -94,7 +94,7 @@ void FrameTree::removeChild(Frame& child)
> m_scopedChildCount = invalidCount;
> }
> 
>-AtomicString FrameTree::uniqueChildName(const AtomicString& requestedName) const
>+AtomString FrameTree::uniqueChildName(const AtomString& requestedName) const
> {
> // If the requested name (the frame's "name" attribute) is unique, just use that.
> if (!requestedName.isEmpty() && !child(requestedName) && !equalIgnoringASCIICase(requestedName, "_blank"))
>@@ -105,7 +105,7 @@ AtomicString FrameTree::uniqueChildName(const AtomicString& requestedName) const
> return generateUniqueName();
> }
> 
>-AtomicString FrameTree::generateUniqueName() const
>+AtomString FrameTree::generateUniqueName() const
> {
> auto& top = this->top();
> if (&top.tree() != this)
>@@ -142,7 +142,7 @@ inline Frame* FrameTree::scopedChild(unsigned index, TreeScope* scope) const
> return nullptr;
> }
> 
>-inline Frame* FrameTree::scopedChild(const AtomicString& name, TreeScope* scope) const
>+inline Frame* FrameTree::scopedChild(const AtomString& name, TreeScope* scope) const
> {
> if (!scope)
> return nullptr;
>@@ -173,7 +173,7 @@ Frame* FrameTree::scopedChild(unsigned index) const
> return scopedChild(index, m_thisFrame.document());
> }
> 
>-Frame* FrameTree::scopedChild(const AtomicString& name) const
>+Frame* FrameTree::scopedChild(const AtomString& name) const
> {
> return scopedChild(name, m_thisFrame.document());
> }
>@@ -201,7 +201,7 @@ Frame* FrameTree::child(unsigned index) const
> return result;
> }
> 
>-Frame* FrameTree::child(const AtomicString& name) const
>+Frame* FrameTree::child(const AtomString& name) const
> {
> for (Frame* child = firstChild(); child; child = child->tree().nextSibling())
> if (child->tree().uniqueName() == name)
>@@ -221,7 +221,7 @@ static bool isFrameFamiliarWith(Frame& frameA, Frame& frameB)
> return (frameAOpener && frameAOpener->page() == frameB.page()) || (frameBOpener && frameBOpener->page() == frameA.page()) || (frameAOpener && frameBOpener && frameAOpener->page() == frameBOpener->page());
> }
> 
>-Frame* FrameTree::find(const AtomicString& name, Frame& activeFrame) const
>+Frame* FrameTree::find(const AtomString& name, Frame& activeFrame) const
> {
> // FIXME: _current is not part of the HTML specification.
> if (equalIgnoringASCIICase(name, "_self") || name == "_current" || name.isEmpty())
>diff --git a/Source/WebCore/page/FrameTree.h b/Source/WebCore/page/FrameTree.h
>index 97c8f2b7a46ef1cd1d00170bd2758196c3bed7d4..7afb5ca1ef7d9492855cd99ced936465ca0614a8 100644
>--- a/Source/WebCore/page/FrameTree.h
>+++ b/Source/WebCore/page/FrameTree.h
>@@ -19,7 +19,7 @@
> 
> #pragma once
> 
>-#include <wtf/text/AtomicString.h>
>+#include <wtf/text/AtomString.h>
> 
> namespace WebCore {
> 
>@@ -45,9 +45,9 @@ public:
> 
> ~FrameTree();
> 
>- const AtomicString& name() const { return m_name; }
>- const AtomicString& uniqueName() const { return m_uniqueName; }
>- WEBCORE_EXPORT void setName(const AtomicString&);
>+ const AtomString& name() const { return m_name; }
>+ const AtomString& uniqueName() const { return m_uniqueName; }
>+ WEBCORE_EXPORT void setName(const AtomString&);
> WEBCORE_EXPORT void clearName();
> WEBCORE_EXPORT Frame* parent() const;
> 
>@@ -74,13 +74,13 @@ public:
> void removeChild(Frame&);
> 
> Frame* child(unsigned index) const;
>- Frame* child(const AtomicString& name) const;
>- WEBCORE_EXPORT Frame* find(const AtomicString& name, Frame& activeFrame) const;
>+ Frame* child(const AtomString& name) const;
>+ WEBCORE_EXPORT Frame* find(const AtomString& name, Frame& activeFrame) const;
> WEBCORE_EXPORT unsigned childCount() const;
> WEBCORE_EXPORT Frame& top() const;
> 
> WEBCORE_EXPORT Frame* scopedChild(unsigned index) const;
>- WEBCORE_EXPORT Frame* scopedChild(const AtomicString& name) const;
>+ WEBCORE_EXPORT Frame* scopedChild(const AtomString& name) const;
> unsigned scopedChildCount() const;
> 
> void resetFrameIdentifiers() { m_frameIDGenerator = 0; }
>@@ -91,17 +91,17 @@ private:
> 
> bool scopedBy(TreeScope*) const;
> Frame* scopedChild(unsigned index, TreeScope*) const;
>- Frame* scopedChild(const AtomicString& name, TreeScope*) const;
>+ Frame* scopedChild(const AtomString& name, TreeScope*) const;
> unsigned scopedChildCount(TreeScope*) const;
> 
>- AtomicString uniqueChildName(const AtomicString& requestedName) const;
>- AtomicString generateUniqueName() const;
>+ AtomString uniqueChildName(const AtomString& requestedName) const;
>+ AtomString generateUniqueName() const;
> 
> Frame& m_thisFrame;
> 
> Frame* m_parent;
>- AtomicString m_name; // The actual frame name (may be empty).
>- AtomicString m_uniqueName;
>+ AtomString m_name; // The actual frame name (may be empty).
>+ AtomString m_uniqueName;
> 
> RefPtr<Frame> m_nextSibling;
> Frame* m_previousSibling;
>diff --git a/Source/WebCore/page/Page.cpp b/Source/WebCore/page/Page.cpp
>index dea5ea2ffe6dcde034a528ff05c66955b58583ed..90e4c935dcd0bcde2fc4c57fe222cc721f51d3c2 100644
>--- a/Source/WebCore/page/Page.cpp
>+++ b/Source/WebCore/page/Page.cpp
>@@ -2949,7 +2949,7 @@ void Page::removeLatchingStateForTarget(Element& targetNode)
> }
> #endif // PLATFORM(MAC)
> 
>-static void dispatchPrintEvent(Frame& mainFrame, const AtomicString& eventType)
>+static void dispatchPrintEvent(Frame& mainFrame, const AtomString& eventType)
> {
> Vector<Ref<Frame>> frames;
> for (auto* frame = &mainFrame; frame; frame = frame->tree().traverseNext())
>diff --git a/Source/WebCore/page/PerformanceResourceTiming.h b/Source/WebCore/page/PerformanceResourceTiming.h
>index bbb3f349b6d7bb7da27772d59428324ce393d9b8..8b321f1b1ee112e09a16988194d7a8322532db62 100644
>--- a/Source/WebCore/page/PerformanceResourceTiming.h
>+++ b/Source/WebCore/page/PerformanceResourceTiming.h
>@@ -46,7 +46,7 @@ class PerformanceResourceTiming final : public PerformanceEntry {
> public:
> static Ref<PerformanceResourceTiming> create(MonotonicTime timeOrigin, ResourceTiming&&);
> 
>- AtomicString initiatorType() const { return m_initiatorType; }
>+ AtomString initiatorType() const { return m_initiatorType; }
> String nextHopProtocol() const;
> 
> double workerStart() const;
>@@ -69,7 +69,7 @@ private:
> 
> double networkLoadTimeToDOMHighResTimeStamp(Seconds) const;
> 
>- AtomicString m_initiatorType;
>+ AtomString m_initiatorType;
> MonotonicTime m_timeOrigin;
> LoadTiming m_loadTiming;
> NetworkLoadMetrics m_networkLoadMetrics;
>diff --git a/Source/WebCore/page/PointerLockController.cpp b/Source/WebCore/page/PointerLockController.cpp
>index 764a79cb495fc10c159f94322acfb396e2ac8853..a3913a4d5dc28d197318a8e50a10297a6e07c77c 100644
>--- a/Source/WebCore/page/PointerLockController.cpp
>+++ b/Source/WebCore/page/PointerLockController.cpp
>@@ -182,7 +182,7 @@ void PointerLockController::didLosePointerLock()
> }
> }
> 
>-void PointerLockController::dispatchLockedMouseEvent(const PlatformMouseEvent& event, const AtomicString& eventType)
>+void PointerLockController::dispatchLockedMouseEvent(const PlatformMouseEvent& event, const AtomString& eventType)
> {
> if (!m_element || !m_element->document().frame())
> return;
>@@ -208,13 +208,13 @@ void PointerLockController::clearElement()
> m_element = nullptr;
> }
> 
>-void PointerLockController::enqueueEvent(const AtomicString& type, Element* element)
>+void PointerLockController::enqueueEvent(const AtomString& type, Element* element)
> {
> if (element)
> enqueueEvent(type, &element->document());
> }
> 
>-void PointerLockController::enqueueEvent(const AtomicString& type, Document* document)
>+void PointerLockController::enqueueEvent(const AtomString& type, Document* document)
> {
> if (document)
> document->enqueueDocumentEvent(Event::create(type, Event::CanBubble::Yes, Event::IsCancelable::No));
>diff --git a/Source/WebCore/page/PointerLockController.h b/Source/WebCore/page/PointerLockController.h
>index 5077465fb5456dfbf286a00313429e891a87febb..fd1bc5a36a9998197163d08320718280431b8d5c 100644
>--- a/Source/WebCore/page/PointerLockController.h
>+++ b/Source/WebCore/page/PointerLockController.h
>@@ -28,7 +28,7 @@
> 
> #include <wtf/RefPtr.h>
> #include <wtf/WeakPtr.h>
>-#include <wtf/text/AtomicString.h>
>+#include <wtf/text/AtomString.h>
> 
> namespace WebCore {
> 
>@@ -57,13 +57,13 @@ public:
> WEBCORE_EXPORT void didAcquirePointerLock();
> WEBCORE_EXPORT void didNotAcquirePointerLock();
> WEBCORE_EXPORT void didLosePointerLock();
>- void dispatchLockedMouseEvent(const PlatformMouseEvent&, const AtomicString& eventType);
>+ void dispatchLockedMouseEvent(const PlatformMouseEvent&, const AtomString& eventType);
> void dispatchLockedWheelEvent(const PlatformWheelEvent&);
> 
> private:
> void clearElement();
>- void enqueueEvent(const AtomicString& type, Element*);
>- void enqueueEvent(const AtomicString& type, Document*);
>+ void enqueueEvent(const AtomString& type, Element*);
>+ void enqueueEvent(const AtomString& type, Document*);
> Page& m_page;
> bool m_lockPending { false };
> bool m_unlockPending { false };
>diff --git a/Source/WebCore/page/ProcessWarming.cpp b/Source/WebCore/page/ProcessWarming.cpp
>index b3d6a95a0c32fa9e1c4c22504f3014956ce33297..a158990a92263a29cb68cb5a49da9087d14293a5 100644
>--- a/Source/WebCore/page/ProcessWarming.cpp
>+++ b/Source/WebCore/page/ProcessWarming.cpp
>@@ -47,7 +47,7 @@ namespace WebCore {
> 
> void ProcessWarming::initializeNames()
> {
>- AtomicString::init();
>+ AtomString::init();
> HTMLNames::init();
> QualifiedName::init();
> MediaFeatureNames::init();
>diff --git a/Source/WebCore/page/SettingsBase.cpp b/Source/WebCore/page/SettingsBase.cpp
>index a3533e910eb3583057c2129f8a9c3ed2559122cb..57be09cd1c09b88880dd2cc5a7f12345afec3107 100644
>--- a/Source/WebCore/page/SettingsBase.cpp
>+++ b/Source/WebCore/page/SettingsBase.cpp
>@@ -73,9 +73,9 @@ SettingsBase::SettingsBase(Page* page)
> , m_minimumDOMTimerInterval(DOMTimer::defaultMinimumInterval())
> , m_setImageLoadingSettingsTimer(*this, &SettingsBase::imageLoadingSettingsTimerFired)
> {
>- // A Frame may not have been created yet, so we initialize the AtomicString
>+ // A Frame may not have been created yet, so we initialize the AtomString
> // hash before trying to use it.
>- AtomicString::init();
>+ AtomString::init();
> initializeDefaultFontFamilies();
> m_page = page; // Page is not yet fully initialized when constructing Settings, so keeping m_page null over initializeDefaultFontFamilies() call.
> }
>@@ -137,84 +137,84 @@ bool SettingsBase::platformDefaultMediaSourceEnabled()
> }
> #endif
> 
>-const AtomicString& SettingsBase::standardFontFamily(UScriptCode script) const
>+const AtomString& SettingsBase::standardFontFamily(UScriptCode script) const
> {
> return m_fontGenericFamilies->standardFontFamily(script);
> }
> 
>-void SettingsBase::setStandardFontFamily(const AtomicString& family, UScriptCode script)
>+void SettingsBase::setStandardFontFamily(const AtomString& family, UScriptCode script)
> {
> bool changes = m_fontGenericFamilies->setStandardFontFamily(family, script);
> if (changes)
> invalidateAfterGenericFamilyChange(m_page);
> }
> 
>-const AtomicString& SettingsBase::fixedFontFamily(UScriptCode script) const
>+const AtomString& SettingsBase::fixedFontFamily(UScriptCode script) const
> {
> return m_fontGenericFamilies->fixedFontFamily(script);
> }
> 
>-void SettingsBase::setFixedFontFamily(const AtomicString& family, UScriptCode script)
>+void SettingsBase::setFixedFontFamily(const AtomString& family, UScriptCode script)
> {
> bool changes = m_fontGenericFamilies->setFixedFontFamily(family, script);
> if (changes)
> invalidateAfterGenericFamilyChange(m_page);
> }
> 
>-const AtomicString& SettingsBase::serifFontFamily(UScriptCode script) const
>+const AtomString& SettingsBase::serifFontFamily(UScriptCode script) const
> {
> return m_fontGenericFamilies->serifFontFamily(script);
> }
> 
>-void SettingsBase::setSerifFontFamily(const AtomicString& family, UScriptCode script)
>+void SettingsBase::setSerifFontFamily(const AtomString& family, UScriptCode script)
> {
> bool changes = m_fontGenericFamilies->setSerifFontFamily(family, script);
> if (changes)
> invalidateAfterGenericFamilyChange(m_page);
> }
> 
>-const AtomicString& SettingsBase::sansSerifFontFamily(UScriptCode script) const
>+const AtomString& SettingsBase::sansSerifFontFamily(UScriptCode script) const
> {
> return m_fontGenericFamilies->sansSerifFontFamily(script);
> }
> 
>-void SettingsBase::setSansSerifFontFamily(const AtomicString& family, UScriptCode script)
>+void SettingsBase::setSansSerifFontFamily(const AtomString& family, UScriptCode script)
> {
> bool changes = m_fontGenericFamilies->setSansSerifFontFamily(family, script);
> if (changes)
> invalidateAfterGenericFamilyChange(m_page);
> }
> 
>-const AtomicString& SettingsBase::cursiveFontFamily(UScriptCode script) const
>+const AtomString& SettingsBase::cursiveFontFamily(UScriptCode script) const
> {
> return m_fontGenericFamilies->cursiveFontFamily(script);
> }
> 
>-void SettingsBase::setCursiveFontFamily(const AtomicString& family, UScriptCode script)
>+void SettingsBase::setCursiveFontFamily(const AtomString& family, UScriptCode script)
> {
> bool changes = m_fontGenericFamilies->setCursiveFontFamily(family, script);
> if (changes)
> invalidateAfterGenericFamilyChange(m_page);
> }
> 
>-const AtomicString& SettingsBase::fantasyFontFamily(UScriptCode script) const
>+const AtomString& SettingsBase::fantasyFontFamily(UScriptCode script) const
> {
> return m_fontGenericFamilies->fantasyFontFamily(script);
> }
> 
>-void SettingsBase::setFantasyFontFamily(const AtomicString& family, UScriptCode script)
>+void SettingsBase::setFantasyFontFamily(const AtomString& family, UScriptCode script)
> {
> bool changes = m_fontGenericFamilies->setFantasyFontFamily(family, script);
> if (changes)
> invalidateAfterGenericFamilyChange(m_page);
> }
> 
>-const AtomicString& SettingsBase::pictographFontFamily(UScriptCode script) const
>+const AtomString& SettingsBase::pictographFontFamily(UScriptCode script) const
> {
> return m_fontGenericFamilies->pictographFontFamily(script);
> }
> 
>-void SettingsBase::setPictographFontFamily(const AtomicString& family, UScriptCode script)
>+void SettingsBase::setPictographFontFamily(const AtomString& family, UScriptCode script)
> {
> bool changes = m_fontGenericFamilies->setPictographFontFamily(family, script);
> if (changes)
>diff --git a/Source/WebCore/page/SettingsBase.h b/Source/WebCore/page/SettingsBase.h
>index 7cacf7534e684920d5d68c22228c620e3154b017..b8501cb71a94c1aa07bf1a12fbf59351736ddb0f 100644
>--- a/Source/WebCore/page/SettingsBase.h
>+++ b/Source/WebCore/page/SettingsBase.h
>@@ -40,8 +40,8 @@
> #include <unicode/uscript.h>
> #include <wtf/HashMap.h>
> #include <wtf/RefCounted.h>
>-#include <wtf/text/AtomicString.h>
>-#include <wtf/text/AtomicStringHash.h>
>+#include <wtf/text/AtomString.h>
>+#include <wtf/text/AtomStringHash.h>
> 
> #if ENABLE(DATA_DETECTION)
> #include "DataDetection.h"
>@@ -133,26 +133,26 @@ public:
> constexpr static const float defaultMaxTextAutosizingScaleIncrease = 1.7f;
> #endif
> 
>- WEBCORE_EXPORT void setStandardFontFamily(const AtomicString&, UScriptCode = USCRIPT_COMMON);
>- WEBCORE_EXPORT const AtomicString& standardFontFamily(UScriptCode = USCRIPT_COMMON) const;
>+ WEBCORE_EXPORT void setStandardFontFamily(const AtomString&, UScriptCode = USCRIPT_COMMON);
>+ WEBCORE_EXPORT const AtomString& standardFontFamily(UScriptCode = USCRIPT_COMMON) const;
> 
>- WEBCORE_EXPORT void setFixedFontFamily(const AtomicString&, UScriptCode = USCRIPT_COMMON);
>- WEBCORE_EXPORT const AtomicString& fixedFontFamily(UScriptCode = USCRIPT_COMMON) const;
>+ WEBCORE_EXPORT void setFixedFontFamily(const AtomString&, UScriptCode = USCRIPT_COMMON);
>+ WEBCORE_EXPORT const AtomString& fixedFontFamily(UScriptCode = USCRIPT_COMMON) const;
> 
>- WEBCORE_EXPORT void setSerifFontFamily(const AtomicString&, UScriptCode = USCRIPT_COMMON);
>- WEBCORE_EXPORT const AtomicString& serifFontFamily(UScriptCode = USCRIPT_COMMON) const;
>+ WEBCORE_EXPORT void setSerifFontFamily(const AtomString&, UScriptCode = USCRIPT_COMMON);
>+ WEBCORE_EXPORT const AtomString& serifFontFamily(UScriptCode = USCRIPT_COMMON) const;
> 
>- WEBCORE_EXPORT void setSansSerifFontFamily(const AtomicString&, UScriptCode = USCRIPT_COMMON);
>- WEBCORE_EXPORT const AtomicString& sansSerifFontFamily(UScriptCode = USCRIPT_COMMON) const;
>+ WEBCORE_EXPORT void setSansSerifFontFamily(const AtomString&, UScriptCode = USCRIPT_COMMON);
>+ WEBCORE_EXPORT const AtomString& sansSerifFontFamily(UScriptCode = USCRIPT_COMMON) const;
> 
>- WEBCORE_EXPORT void setCursiveFontFamily(const AtomicString&, UScriptCode = USCRIPT_COMMON);
>- WEBCORE_EXPORT const AtomicString& cursiveFontFamily(UScriptCode = USCRIPT_COMMON) const;
>+ WEBCORE_EXPORT void setCursiveFontFamily(const AtomString&, UScriptCode = USCRIPT_COMMON);
>+ WEBCORE_EXPORT const AtomString& cursiveFontFamily(UScriptCode = USCRIPT_COMMON) const;
> 
>- WEBCORE_EXPORT void setFantasyFontFamily(const AtomicString&, UScriptCode = USCRIPT_COMMON);
>- WEBCORE_EXPORT const AtomicString& fantasyFontFamily(UScriptCode = USCRIPT_COMMON) const;
>+ WEBCORE_EXPORT void setFantasyFontFamily(const AtomString&, UScriptCode = USCRIPT_COMMON);
>+ WEBCORE_EXPORT const AtomString& fantasyFontFamily(UScriptCode = USCRIPT_COMMON) const;
> 
>- WEBCORE_EXPORT void setPictographFontFamily(const AtomicString&, UScriptCode = USCRIPT_COMMON);
>- WEBCORE_EXPORT const AtomicString& pictographFontFamily(UScriptCode = USCRIPT_COMMON) const;
>+ WEBCORE_EXPORT void setPictographFontFamily(const AtomString&, UScriptCode = USCRIPT_COMMON);
>+ WEBCORE_EXPORT const AtomString& pictographFontFamily(UScriptCode = USCRIPT_COMMON) const;
> 
> WEBCORE_EXPORT void setMinimumDOMTimerInterval(Seconds); // Initialized to DOMTimer::defaultMinimumInterval().
> Seconds minimumDOMTimerInterval() const { return m_minimumDOMTimerInterval; }
>diff --git a/Source/WebCore/page/UserMessageHandlerDescriptor.cpp b/Source/WebCore/page/UserMessageHandlerDescriptor.cpp
>index d939f7ee649cad5e4f11ebe618c9aabb72b25a53..ca125ed89f6f5e210de527ab79d1634ad17fdc5d 100644
>--- a/Source/WebCore/page/UserMessageHandlerDescriptor.cpp
>+++ b/Source/WebCore/page/UserMessageHandlerDescriptor.cpp
>@@ -32,7 +32,7 @@
> 
> namespace WebCore {
> 
>-UserMessageHandlerDescriptor::UserMessageHandlerDescriptor(const AtomicString& name, DOMWrapperWorld& world)
>+UserMessageHandlerDescriptor::UserMessageHandlerDescriptor(const AtomString& name, DOMWrapperWorld& world)
> : m_name(name)
> , m_world(world)
> {
>@@ -40,7 +40,7 @@ UserMessageHandlerDescriptor::UserMessageHandlerDescriptor(const AtomicString& n
> 
> UserMessageHandlerDescriptor::~UserMessageHandlerDescriptor() = default;
> 
>-const AtomicString& UserMessageHandlerDescriptor::name() const
>+const AtomString& UserMessageHandlerDescriptor::name() const
> {
> return m_name;
> }
>diff --git a/Source/WebCore/page/UserMessageHandlerDescriptor.h b/Source/WebCore/page/UserMessageHandlerDescriptor.h
>index d297a8294320dfb740b67e6d01752268e37b66f1..45e1557e06b6bb106d2492279f92907a88ce8fa7 100644
>--- a/Source/WebCore/page/UserMessageHandlerDescriptor.h
>+++ b/Source/WebCore/page/UserMessageHandlerDescriptor.h
>@@ -29,7 +29,7 @@
> 
> #include <wtf/Ref.h>
> #include <wtf/RefCounted.h>
>-#include <wtf/text/AtomicString.h>
>+#include <wtf/text/AtomString.h>
> 
> namespace WebCore {
> 
>@@ -39,17 +39,17 @@ class UserMessageHandler;
> 
> class UserMessageHandlerDescriptor : public RefCounted<UserMessageHandlerDescriptor> {
> public:
>- WEBCORE_EXPORT explicit UserMessageHandlerDescriptor(const AtomicString&, DOMWrapperWorld&);
>+ WEBCORE_EXPORT explicit UserMessageHandlerDescriptor(const AtomString&, DOMWrapperWorld&);
> WEBCORE_EXPORT virtual ~UserMessageHandlerDescriptor();
> 
>- WEBCORE_EXPORT const AtomicString& name() const;
>+ WEBCORE_EXPORT const AtomString& name() const;
> WEBCORE_EXPORT DOMWrapperWorld& world();
> WEBCORE_EXPORT const DOMWrapperWorld& world() const;
> 
> virtual void didPostMessage(UserMessageHandler&, SerializedScriptValue*) = 0;
> 
> private:
>- AtomicString m_name;
>+ AtomString m_name;
> Ref<DOMWrapperWorld> m_world;
> };
> 
>diff --git a/Source/WebCore/page/UserMessageHandlerDescriptorTypes.h b/Source/WebCore/page/UserMessageHandlerDescriptorTypes.h
>index 681605483731c9a18f0a2bc21cc933dca927d3eb..a148b613161f588cb695d0ffe57fe4b1e1d6d2a3 100644
>--- a/Source/WebCore/page/UserMessageHandlerDescriptorTypes.h
>+++ b/Source/WebCore/page/UserMessageHandlerDescriptorTypes.h
>@@ -29,15 +29,15 @@
> 
> #include <wtf/HashMap.h>
> #include <wtf/RefPtr.h>
>-#include <wtf/text/AtomicString.h>
>-#include <wtf/text/AtomicStringHash.h>
>+#include <wtf/text/AtomString.h>
>+#include <wtf/text/AtomStringHash.h>
> 
> namespace WebCore {
> 
> class DOMWrapperWorld;
> class UserMessageHandlerDescriptor;
> 
>-typedef HashMap<std::pair<AtomicString, RefPtr<DOMWrapperWorld>>, RefPtr<UserMessageHandlerDescriptor>> UserMessageHandlerDescriptorMap;
>+typedef HashMap<std::pair<AtomString, RefPtr<DOMWrapperWorld>>, RefPtr<UserMessageHandlerDescriptor>> UserMessageHandlerDescriptorMap;
> 
> } // namespace WebCore
> 
>diff --git a/Source/WebCore/page/UserMessageHandlersNamespace.cpp b/Source/WebCore/page/UserMessageHandlersNamespace.cpp
>index 6b1d81fe4d4058890c299c807102ba18c07a9a45..e6b289717bed9a05a51361f0cb79f70bb6178ec7 100644
>--- a/Source/WebCore/page/UserMessageHandlersNamespace.cpp
>+++ b/Source/WebCore/page/UserMessageHandlersNamespace.cpp
>@@ -64,14 +64,14 @@ void UserMessageHandlersNamespace::didInvalidate(UserContentProvider& provider)
> userMessageHandler->invalidateDescriptor();
> }
> 
>-Vector<AtomicString> UserMessageHandlersNamespace::supportedPropertyNames() const
>+Vector<AtomString> UserMessageHandlersNamespace::supportedPropertyNames() const
> {
> // FIXME: Consider adding support for iterating the registered UserMessageHandlers. This would
> // require adding support for passing the DOMWrapperWorld to supportedPropertyNames.
> return { };
> }
> 
>-UserMessageHandler* UserMessageHandlersNamespace::namedItem(DOMWrapperWorld& world, const AtomicString& name)
>+UserMessageHandler* UserMessageHandlersNamespace::namedItem(DOMWrapperWorld& world, const AtomString& name)
> {
> Frame* frame = this->frame();
> if (!frame)
>@@ -81,7 +81,7 @@ UserMessageHandler* UserMessageHandlersNamespace::namedItem(DOMWrapperWorld& wor
> if (!page)
> return nullptr;
> 
>- UserMessageHandler* handler = m_messageHandlers.get(std::pair<AtomicString, RefPtr<DOMWrapperWorld>>(name, &world));
>+ UserMessageHandler* handler = m_messageHandlers.get(std::pair<AtomString, RefPtr<DOMWrapperWorld>>(name, &world));
> if (handler)
> return handler;
> 
>diff --git a/Source/WebCore/page/UserMessageHandlersNamespace.h b/Source/WebCore/page/UserMessageHandlersNamespace.h
>index 35e8fcbf8f2b8fc23aff88a1fa382eb6cf1974d2..50940e9fd0f8eeac1d2037d377e3fbc35ae0fbd0 100644
>--- a/Source/WebCore/page/UserMessageHandlersNamespace.h
>+++ b/Source/WebCore/page/UserMessageHandlersNamespace.h
>@@ -33,8 +33,8 @@
> #include <wtf/HashMap.h>
> #include <wtf/RefCounted.h>
> #include <wtf/RefPtr.h>
>-#include <wtf/text/AtomicString.h>
>-#include <wtf/text/AtomicStringHash.h>
>+#include <wtf/text/AtomString.h>
>+#include <wtf/text/AtomStringHash.h>
> 
> namespace WebCore {
> 
>@@ -51,8 +51,8 @@ public:
> 
> virtual ~UserMessageHandlersNamespace();
> 
>- Vector<AtomicString> supportedPropertyNames() const;
>- UserMessageHandler* namedItem(DOMWrapperWorld&, const AtomicString&);
>+ Vector<AtomString> supportedPropertyNames() const;
>+ UserMessageHandler* namedItem(DOMWrapperWorld&, const AtomString&);
> 
> private:
> explicit UserMessageHandlersNamespace(Frame&, UserContentProvider&);
>@@ -61,7 +61,7 @@ private:
> void didInvalidate(UserContentProvider&) override;
> 
> Ref<UserContentProvider> m_userContentProvider;
>- HashMap<std::pair<AtomicString, RefPtr<DOMWrapperWorld>>, RefPtr<UserMessageHandler>> m_messageHandlers;
>+ HashMap<std::pair<AtomString, RefPtr<DOMWrapperWorld>>, RefPtr<UserMessageHandler>> m_messageHandlers;
> };
> 
> } // namespace WebCore
>diff --git a/Source/WebCore/page/VisitedLinkStore.h b/Source/WebCore/page/VisitedLinkStore.h
>index 26d650dba74dc502cf9309a3f3d1c05da6b649b3..c663ba94b9ce0c51fd11d15738b0a88c8ae41265 100644
>--- a/Source/WebCore/page/VisitedLinkStore.h
>+++ b/Source/WebCore/page/VisitedLinkStore.h
>@@ -40,7 +40,7 @@ public:
> WEBCORE_EXPORT virtual ~VisitedLinkStore();
> 
> // FIXME: These two members should only take the link hash.
>- virtual bool isLinkVisited(Page&, SharedStringHash, const URL& baseURL, const AtomicString& attributeURL) = 0;
>+ virtual bool isLinkVisited(Page&, SharedStringHash, const URL& baseURL, const AtomString& attributeURL) = 0;
> virtual void addVisitedLink(Page&, SharedStringHash) = 0;
> 
> void addPage(Page&);
>diff --git a/Source/WebCore/page/VisualViewport.cpp b/Source/WebCore/page/VisualViewport.cpp
>index 0ffbe0ae88157c1bee3601734deca95ddda4c3af..bb07f8452093f930c5b10b7d18ec957ab746820d 100644
>--- a/Source/WebCore/page/VisualViewport.cpp
>+++ b/Source/WebCore/page/VisualViewport.cpp
>@@ -59,7 +59,7 @@ ScriptExecutionContext* VisualViewport::scriptExecutionContext() const
> return static_cast<ContextDestructionObserver*>(window)->scriptExecutionContext();
> }
> 
>-bool VisualViewport::addEventListener(const AtomicString& eventType, Ref<EventListener>&& listener, const AddEventListenerOptions& options)
>+bool VisualViewport::addEventListener(const AtomString& eventType, Ref<EventListener>&& listener, const AddEventListenerOptions& options)
> {
> if (!EventTarget::addEventListener(eventType, WTFMove(listener), options))
> return false;
>diff --git a/Source/WebCore/page/VisualViewport.h b/Source/WebCore/page/VisualViewport.h
>index a433adb76e18307e84c1aedbeda750215e9bc34b..f7b9c125bfe02f8cca8c0b46f0af0df09ef3afe5 100644
>--- a/Source/WebCore/page/VisualViewport.h
>+++ b/Source/WebCore/page/VisualViewport.h
>@@ -39,7 +39,7 @@ public:
> // EventTarget
> EventTargetInterface eventTargetInterface() const final;
> ScriptExecutionContext* scriptExecutionContext() const final;
>- bool addEventListener(const AtomicString& eventType, Ref<EventListener>&&, const AddEventListenerOptions&) final;
>+ bool addEventListener(const AtomString& eventType, Ref<EventListener>&&, const AddEventListenerOptions&) final;
> 
> double offsetLeft() const;
> double offsetTop() const;
>diff --git a/Source/WebCore/page/animation/CSSAnimationController.cpp b/Source/WebCore/page/animation/CSSAnimationController.cpp
>index 8bb94e998abe5a65cdb2832d75dff1e6c5a597b0..d51264161e34ba92ade76c302e3c586cd3a8ef67 100644
>--- a/Source/WebCore/page/animation/CSSAnimationController.cpp
>+++ b/Source/WebCore/page/animation/CSSAnimationController.cpp
>@@ -240,7 +240,7 @@ void CSSAnimationControllerPrivate::startUpdateStyleIfNeededDispatcher()
> m_updateStyleIfNeededDispatcher.startOneShot(0_s);
> }
> 
>-void CSSAnimationControllerPrivate::addEventToDispatch(Element& element, const AtomicString& eventType, const String& name, double elapsedTime)
>+void CSSAnimationControllerPrivate::addEventToDispatch(Element& element, const AtomString& eventType, const String& name, double elapsedTime)
> {
> m_eventsToDispatch.append({ element, eventType, name, elapsedTime });
> startUpdateStyleIfNeededDispatcher();
>@@ -409,7 +409,7 @@ void CSSAnimationControllerPrivate::setAllowsNewAnimationsWhileSuspended(bool al
> m_allowsNewAnimationsWhileSuspended = allowed;
> }
> 
>-bool CSSAnimationControllerPrivate::pauseAnimationAtTime(Element& element, const AtomicString& name, double t)
>+bool CSSAnimationControllerPrivate::pauseAnimationAtTime(Element& element, const AtomString& name, double t)
> {
> CompositeAnimation& compositeAnimation = ensureCompositeAnimation(element);
> if (compositeAnimation.pauseAnimationAtTime(name, t)) {
>@@ -673,7 +673,7 @@ void CSSAnimationController::notifyAnimationStarted(RenderElement& renderer, Mon
> m_data->receivedStartTimeResponse(startTime);
> }
> 
>-bool CSSAnimationController::pauseAnimationAtTime(Element& element, const AtomicString& name, double t)
>+bool CSSAnimationController::pauseAnimationAtTime(Element& element, const AtomString& name, double t)
> {
> AnimationUpdateBlock animationUpdateBlock(this);
> return m_data->pauseAnimationAtTime(element, name, t);
>diff --git a/Source/WebCore/page/animation/CSSAnimationController.h b/Source/WebCore/page/animation/CSSAnimationController.h
>index cbe88500afae65ce2ea2a70d9d71ef5995e27c03..ec7b9c7d27f9c9d2e85a30ff6fabab1d9ba0b22f 100644
>--- a/Source/WebCore/page/animation/CSSAnimationController.h
>+++ b/Source/WebCore/page/animation/CSSAnimationController.h
>@@ -65,7 +65,7 @@ public:
> // This is called when an accelerated animation or transition has actually started to animate.
> void notifyAnimationStarted(RenderElement&, MonotonicTime startTime);
> 
>- WEBCORE_EXPORT bool pauseAnimationAtTime(Element&, const AtomicString& name, double t); // To be used only for testing
>+ WEBCORE_EXPORT bool pauseAnimationAtTime(Element&, const AtomString& name, double t); // To be used only for testing
> WEBCORE_EXPORT bool pauseTransitionAtTime(Element&, const String& property, double t); // To be used only for testing
> WEBCORE_EXPORT unsigned numberOfActiveAnimations(Document*) const; // To be used only for testing
> 
>diff --git a/Source/WebCore/page/animation/CSSAnimationControllerPrivate.h b/Source/WebCore/page/animation/CSSAnimationControllerPrivate.h
>index 55f586852c731e720ab3fba3259fa6032c55f5fb..d320377decc9c534deeb7b4e95ce0ed2d85aedb1 100644
>--- a/Source/WebCore/page/animation/CSSAnimationControllerPrivate.h
>+++ b/Source/WebCore/page/animation/CSSAnimationControllerPrivate.h
>@@ -57,7 +57,7 @@ public:
> 
> void updateStyleIfNeededDispatcherFired();
> void startUpdateStyleIfNeededDispatcher();
>- void addEventToDispatch(Element&, const AtomicString& eventType, const String& name, double elapsedTime);
>+ void addEventToDispatch(Element&, const AtomString& eventType, const String& name, double elapsedTime);
> void addElementChangeToDispatch(Element&);
> 
> bool hasAnimations() const { return !m_compositeAnimations.isEmpty(); }
>@@ -79,7 +79,7 @@ public:
> bool isRunningAnimationOnRenderer(RenderElement&, CSSPropertyID) const;
> bool isRunningAcceleratedAnimationOnRenderer(RenderElement&, CSSPropertyID) const;
> 
>- bool pauseAnimationAtTime(Element&, const AtomicString& name, double t);
>+ bool pauseAnimationAtTime(Element&, const AtomString& name, double t);
> bool pauseTransitionAtTime(Element&, const String& property, double t);
> unsigned numberOfActiveAnimations(Document*) const;
> 
>@@ -122,7 +122,7 @@ private:
> 
> struct EventToDispatch {
> Ref<Element> element;
>- AtomicString eventType;
>+ AtomString eventType;
> String name;
> double elapsedTime;
> };
>diff --git a/Source/WebCore/page/animation/CompositeAnimation.cpp b/Source/WebCore/page/animation/CompositeAnimation.cpp
>index a7816317533e8806914b90dee0289bfb3a9a211b..e57629358a424d8e002c8eecaebdc3307a3002c9 100644
>--- a/Source/WebCore/page/animation/CompositeAnimation.cpp
>+++ b/Source/WebCore/page/animation/CompositeAnimation.cpp
>@@ -220,14 +220,14 @@ void CompositeAnimation::updateKeyframeAnimations(Element& element, const Render
> // Toss the animation order map.
> m_keyframeAnimationOrderMap.clear();
> 
>- static NeverDestroyed<const AtomicString> none("none", AtomicString::ConstructFromLiteral);
>+ static NeverDestroyed<const AtomString> none("none", AtomString::ConstructFromLiteral);
> 
> // Now mark any still active animations as active and add any new animations.
> if (targetStyle.animations()) {
> int numAnims = targetStyle.animations()->size();
> for (int i = 0; i < numAnims; ++i) {
> auto& animation = targetStyle.animations()->animation(i);
>- AtomicString animationName(animation.name());
>+ AtomString animationName(animation.name());
> 
> if (!animation.isValidAnimation())
> continue;
>@@ -526,7 +526,7 @@ bool CompositeAnimation::isAnimatingProperty(CSSPropertyID property, bool accele
> return false;
> }
> 
>-bool CompositeAnimation::pauseAnimationAtTime(const AtomicString& name, double t)
>+bool CompositeAnimation::pauseAnimationAtTime(const AtomString& name, double t)
> {
> m_keyframeAnimations.checkConsistency();
> 
>diff --git a/Source/WebCore/page/animation/CompositeAnimation.h b/Source/WebCore/page/animation/CompositeAnimation.h
>index 4052b93d4b149aad83d512765cc5dd5bdd443beb..9422692396d2fba6880d1cd9f9c8d69b82e7b0c5 100644
>--- a/Source/WebCore/page/animation/CompositeAnimation.h
>+++ b/Source/WebCore/page/animation/CompositeAnimation.h
>@@ -32,7 +32,7 @@
> #include "ImplicitAnimation.h"
> #include "KeyframeAnimation.h"
> #include <wtf/HashMap.h>
>-#include <wtf/text/AtomicString.h>
>+#include <wtf/text/AtomString.h>
> 
> namespace WebCore {
> 
>@@ -76,7 +76,7 @@ public:
> void overrideImplicitAnimations(CSSPropertyID);
> void resumeOverriddenImplicitAnimations(CSSPropertyID);
> 
>- bool pauseAnimationAtTime(const AtomicString& name, double t);
>+ bool pauseAnimationAtTime(const AtomString& name, double t);
> bool pauseTransitionAtTime(CSSPropertyID, double);
> unsigned numberOfActiveAnimations() const;
> 
>@@ -89,7 +89,7 @@ private:
> void updateKeyframeAnimations(Element&, const RenderStyle* currentStyle, const RenderStyle& targetStyle);
> 
> typedef HashMap<int, RefPtr<ImplicitAnimation>> CSSPropertyTransitionsMap;
>- typedef HashMap<AtomicStringImpl*, RefPtr<KeyframeAnimation>> AnimationNameMap;
>+ typedef HashMap<AtomStringImpl*, RefPtr<KeyframeAnimation>> AnimationNameMap;
> 
> bool m_suspended { false };
> bool m_hasAnimationThatDependsOnLayout { false };
>@@ -97,7 +97,7 @@ private:
> CSSAnimationControllerPrivate& m_animationController;
> CSSPropertyTransitionsMap m_transitions;
> AnimationNameMap m_keyframeAnimations;
>- Vector<AtomicStringImpl*> m_keyframeAnimationOrderMap;
>+ Vector<AtomStringImpl*> m_keyframeAnimationOrderMap;
> };
> 
> } // namespace WebCore
>diff --git a/Source/WebCore/page/animation/ImplicitAnimation.cpp b/Source/WebCore/page/animation/ImplicitAnimation.cpp
>index 4f7c13ec8a134cc5658f1f8449815c6835520c8e..0477a9e7d085e2777dafb2cb1cf9d9b399dc974c 100644
>--- a/Source/WebCore/page/animation/ImplicitAnimation.cpp
>+++ b/Source/WebCore/page/animation/ImplicitAnimation.cpp
>@@ -201,7 +201,7 @@ void ImplicitAnimation::onAnimationEnd(double elapsedTime)
> endAnimation();
> }
> 
>-bool ImplicitAnimation::sendTransitionEvent(const AtomicString& eventType, double elapsedTime)
>+bool ImplicitAnimation::sendTransitionEvent(const AtomString& eventType, double elapsedTime)
> {
> if (eventType == eventNames().transitionendEvent) {
> Document::ListenerType listenerType = Document::TRANSITIONEND_LISTENER;
>diff --git a/Source/WebCore/page/animation/ImplicitAnimation.h b/Source/WebCore/page/animation/ImplicitAnimation.h
>index 72d4cbf330d6a93e0bb74ce76937336bfd44eead..72b84adcecf928d84e15a40c5c8857605f3e6462 100644
>--- a/Source/WebCore/page/animation/ImplicitAnimation.h
>+++ b/Source/WebCore/page/animation/ImplicitAnimation.h
>@@ -83,7 +83,7 @@ public:
> 
> protected:
> bool shouldSendEventForListener(Document::ListenerType) const; 
>- bool sendTransitionEvent(const AtomicString&, double elapsedTime);
>+ bool sendTransitionEvent(const AtomString&, double elapsedTime);
> 
> void validateTransformFunctionList();
> void checkForMatchingFilterFunctionLists();
>diff --git a/Source/WebCore/page/animation/KeyframeAnimation.cpp b/Source/WebCore/page/animation/KeyframeAnimation.cpp
>index 609691935d6f41829f764eee20505a6afff3ee33..9af5f084c50136603d524b20fba16f595bb979fa 100644
>--- a/Source/WebCore/page/animation/KeyframeAnimation.cpp
>+++ b/Source/WebCore/page/animation/KeyframeAnimation.cpp
>@@ -343,7 +343,7 @@ void KeyframeAnimation::onAnimationEnd(double elapsedTime)
> endAnimation(m_animation->fillsForwards());
> }
> 
>-bool KeyframeAnimation::sendAnimationEvent(const AtomicString& eventType, double elapsedTime)
>+bool KeyframeAnimation::sendAnimationEvent(const AtomString& eventType, double elapsedTime)
> {
> Document::ListenerType listenerType;
> if (eventType == eventNames().webkitAnimationIterationEvent || eventType == eventNames().animationiterationEvent)
>diff --git a/Source/WebCore/page/animation/KeyframeAnimation.h b/Source/WebCore/page/animation/KeyframeAnimation.h
>index 3889fee25fc9a9334592a7c60eafdaa75bb2e2cb..a1c3e66627958e482729d749cd355cb191f40c10 100644
>--- a/Source/WebCore/page/animation/KeyframeAnimation.h
>+++ b/Source/WebCore/page/animation/KeyframeAnimation.h
>@@ -52,7 +52,7 @@ public:
> 
> const KeyframeList& keyframes() const { return m_keyframes; }
> 
>- const AtomicString& name() const { return m_keyframes.animationName(); }
>+ const AtomString& name() const { return m_keyframes.animationName(); }
> 
> bool hasAnimationForProperty(CSSPropertyID) const;
> 
>@@ -77,7 +77,7 @@ protected:
> void resumeOverriddenAnimations() override;
> 
> bool shouldSendEventForListener(Document::ListenerType inListenerType) const;
>- bool sendAnimationEvent(const AtomicString&, double elapsedTime);
>+ bool sendAnimationEvent(const AtomString&, double elapsedTime);
> 
> bool affectsProperty(CSSPropertyID) const override;
> 
>diff --git a/Source/WebCore/page/scrolling/ScrollingTree.cpp b/Source/WebCore/page/scrolling/ScrollingTree.cpp
>index ada2d44652543e4dc1fa3496ebb3f17416a5a764..7d393984b0dffb70ca83c548f60f05e3a6c3fac7 100644
>--- a/Source/WebCore/page/scrolling/ScrollingTree.cpp
>+++ b/Source/WebCore/page/scrolling/ScrollingTree.cpp
>@@ -340,7 +340,7 @@ void ScrollingTree::setMainFrameScrollPosition(FloatPoint position)
> m_treeState.mainFrameScrollPosition = position;
> }
> 
>-TrackingType ScrollingTree::eventTrackingTypeForPoint(const AtomicString& eventName, IntPoint p)
>+TrackingType ScrollingTree::eventTrackingTypeForPoint(const AtomString& eventName, IntPoint p)
> {
> LockHolder lock(m_treeStateMutex);
> return m_treeState.eventTrackingRegions.trackingTypeForPoint(eventName, p);
>diff --git a/Source/WebCore/page/scrolling/ScrollingTree.h b/Source/WebCore/page/scrolling/ScrollingTree.h
>index 1e3aca320da6af2607abb973fbb4f62544b658f5..8eda675e9c3d1d9518d2dc40dd11213cd8fdb757 100644
>--- a/Source/WebCore/page/scrolling/ScrollingTree.h
>+++ b/Source/WebCore/page/scrolling/ScrollingTree.h
>@@ -100,7 +100,7 @@ public:
> virtual void scrollingTreeNodeDidEndScroll() { }
> #endif
> 
>- WEBCORE_EXPORT TrackingType eventTrackingTypeForPoint(const AtomicString& eventName, IntPoint);
>+ WEBCORE_EXPORT TrackingType eventTrackingTypeForPoint(const AtomString& eventName, IntPoint);
> #if ENABLE(POINTER_EVENTS)
> WEBCORE_EXPORT Optional<TouchActionData> touchActionDataAtPoint(IntPoint) const;
> #endif
>diff --git a/Source/WebCore/platform/DateTimeChooser.h b/Source/WebCore/platform/DateTimeChooser.h
>index e5c5fad4ce1966074aad7e1e6a8f52c9f018890e..23b05d7c824f5568c8f87f9785374abc13a010eb 100644
>--- a/Source/WebCore/platform/DateTimeChooser.h
>+++ b/Source/WebCore/platform/DateTimeChooser.h
>@@ -39,12 +39,12 @@
> namespace WebCore {
> 
> struct DateTimeChooserParameters {
>- AtomicString type;
>+ AtomString type;
> IntRect anchorRectInRootView;
> // Locale name for which the chooser should be localized. This
> // might be an invalid name because it comes from HTML lang
> // attributes.
>- AtomicString locale;
>+ AtomString locale;
> String currentValue;
> Vector<String> suggestionValues;
> Vector<String> localizedSuggestionValues;
>diff --git a/Source/WebCore/platform/MediaDescription.h b/Source/WebCore/platform/MediaDescription.h
>index ca4a09b0c4960690f6e0e05c196ef949f20fcf23..21a885205ef7fb80c03e3b51bfdc7ae62754168b 100644
>--- a/Source/WebCore/platform/MediaDescription.h
>+++ b/Source/WebCore/platform/MediaDescription.h
>@@ -35,7 +35,7 @@ class MediaDescription : public RefCounted<MediaDescription> {
> public:
> virtual ~MediaDescription() = default;
> 
>- virtual AtomicString codec() const = 0;
>+ virtual AtomString codec() const = 0;
> virtual bool isVideo() const = 0;
> virtual bool isAudio() const = 0;
> virtual bool isText() const = 0;
>diff --git a/Source/WebCore/platform/MediaSample.h b/Source/WebCore/platform/MediaSample.h
>index 094522c43d065aeaa25bb3fdd5137a10f0243172..6c495c66ba71fca8fc9617f1b1665e17bfa27d7e 100644
>--- a/Source/WebCore/platform/MediaSample.h
>+++ b/Source/WebCore/platform/MediaSample.h
>@@ -31,7 +31,7 @@
> #include <wtf/EnumTraits.h>
> #include <wtf/MediaTime.h>
> #include <wtf/RefCounted.h>
>-#include <wtf/text/AtomicString.h>
>+#include <wtf/text/AtomString.h>
> 
> typedef struct opaqueCMSampleBuffer *CMSampleBufferRef;
> typedef struct _GstSample GstSample;
>@@ -63,7 +63,7 @@ public:
> virtual MediaTime decodeTime() const = 0;
> virtual MediaTime duration() const = 0;
> virtual MediaTime outputDuration() const { return duration(); }
>- virtual AtomicString trackID() const = 0;
>+ virtual AtomString trackID() const = 0;
> virtual void setTrackID(const String&) = 0;
> virtual size_t sizeInBytes() const = 0;
> virtual FloatSize presentationSize() const = 0;
>diff --git a/Source/WebCore/platform/SearchPopupMenu.h b/Source/WebCore/platform/SearchPopupMenu.h
>index 61583eea891d47f37bb5a2f088f9bc4d07f5ce9d..ce4db828cd240d67201d609dbe4004727bbc2640 100644
>--- a/Source/WebCore/platform/SearchPopupMenu.h
>+++ b/Source/WebCore/platform/SearchPopupMenu.h
>@@ -38,8 +38,8 @@ class SearchPopupMenu : public RefCounted<SearchPopupMenu> {
> public:
> virtual ~SearchPopupMenu() = default;
> virtual PopupMenu* popupMenu() = 0;
>- virtual void saveRecentSearches(const AtomicString& name, const Vector<RecentSearch>&) = 0;
>- virtual void loadRecentSearches(const AtomicString& name, Vector<RecentSearch>&) = 0;
>+ virtual void saveRecentSearches(const AtomString& name, const Vector<RecentSearch>&) = 0;
>+ virtual void loadRecentSearches(const AtomString& name, Vector<RecentSearch>&) = 0;
> virtual bool enabled() = 0;
> };
> 
>diff --git a/Source/WebCore/platform/SharedStringHash.cpp b/Source/WebCore/platform/SharedStringHash.cpp
>index afb757cbe4022fedfc4793eabc2569e860e95956..b934e6fa3af3fcfb11d497023560162bdb5bfc52 100644
>--- a/Source/WebCore/platform/SharedStringHash.cpp
>+++ b/Source/WebCore/platform/SharedStringHash.cpp
>@@ -25,7 +25,7 @@
> #include "SharedStringHash.h"
> 
> #include <wtf/URL.h>
>-#include <wtf/text/AtomicString.h>
>+#include <wtf/text/AtomString.h>
> #include <wtf/text/StringHash.h>
> #include <wtf/text/StringView.h>
> 
>@@ -280,7 +280,7 @@ static ALWAYS_INLINE void computeSharedStringHashInline(const URL& base, const C
> return;
> }
> 
>-SharedStringHash computeVisitedLinkHash(const URL& base, const AtomicString& attributeURL)
>+SharedStringHash computeVisitedLinkHash(const URL& base, const AtomString& attributeURL)
> {
> if (attributeURL.isEmpty())
> return 0;
>diff --git a/Source/WebCore/platform/SharedStringHash.h b/Source/WebCore/platform/SharedStringHash.h
>index 3603cf0f2e7f9214b3e253f5479d9cb346b27af8..1261d77cbef4b65c522328fbabe397cc69ea13fa 100644
>--- a/Source/WebCore/platform/SharedStringHash.h
>+++ b/Source/WebCore/platform/SharedStringHash.h
>@@ -58,6 +58,6 @@ WEBCORE_EXPORT SharedStringHash computeSharedStringHash(const UChar* url, unsign
> // base URL, and returns the hash of the string that will be used for visited
> // link coloring. It will return the special value of 0 if attributeURL does not
> // look like a relative URL.
>-SharedStringHash computeVisitedLinkHash(const URL& base, const AtomicString& attributeURL);
>+SharedStringHash computeVisitedLinkHash(const URL& base, const AtomString& attributeURL);
> 
> } // namespace WebCore
>diff --git a/Source/WebCore/platform/cocoa/PlaybackSessionModelMediaElement.h b/Source/WebCore/platform/cocoa/PlaybackSessionModelMediaElement.h
>index 1a2e1511e9681c342293446b3853cf5ac4875358..d41ec3780875523a6f8050023942c8be855e881f 100644
>--- a/Source/WebCore/platform/cocoa/PlaybackSessionModelMediaElement.h
>+++ b/Source/WebCore/platform/cocoa/PlaybackSessionModelMediaElement.h
>@@ -52,7 +52,7 @@ public:
> HTMLMediaElement* mediaElement() const { return m_mediaElement.get(); }
> 
> WEBCORE_EXPORT void handleEvent(WebCore::ScriptExecutionContext&, WebCore::Event&) final;
>- void updateForEventName(const WTF::AtomicString&);
>+ void updateForEventName(const WTF::AtomString&);
> bool operator==(const EventListener& rhs) const final { return static_cast<const WebCore::EventListener*>(this) == &rhs; }
> 
> WEBCORE_EXPORT void addClient(PlaybackSessionModelClient&);
>@@ -103,8 +103,8 @@ protected:
> 
> private:
> void progressEventTimerFired();
>- static const Vector<WTF::AtomicString>& observedEventNames();
>- const WTF::AtomicString& eventNameAll();
>+ static const Vector<WTF::AtomString>& observedEventNames();
>+ const WTF::AtomString& eventNameAll();
> 
> RefPtr<HTMLMediaElement> m_mediaElement;
> bool m_isListening { false };
>diff --git a/Source/WebCore/platform/cocoa/PlaybackSessionModelMediaElement.mm b/Source/WebCore/platform/cocoa/PlaybackSessionModelMediaElement.mm
>index 332fcb15c449a1a3b144f7aca757fd0b9a1b1387..50541ce7a4168e05a0ae04aa9a9e7a485aa6f605 100644
>--- a/Source/WebCore/platform/cocoa/PlaybackSessionModelMediaElement.mm
>+++ b/Source/WebCore/platform/cocoa/PlaybackSessionModelMediaElement.mm
>@@ -111,7 +111,7 @@ void PlaybackSessionModelMediaElement::handleEvent(WebCore::ScriptExecutionConte
> updateForEventName(event.type());
> }
> 
>-void PlaybackSessionModelMediaElement::updateForEventName(const WTF::AtomicString& eventName)
>+void PlaybackSessionModelMediaElement::updateForEventName(const WTF::AtomString& eventName)
> {
> if (m_clients.isEmpty())
> return;
>@@ -385,10 +385,10 @@ double PlaybackSessionModelMediaElement::playbackStartedTime() const
> return m_mediaElement->playbackStartedTime();
> }
> 
>-const Vector<AtomicString>& PlaybackSessionModelMediaElement::observedEventNames()
>+const Vector<AtomString>& PlaybackSessionModelMediaElement::observedEventNames()
> {
> // FIXME(157452): Remove the right-hand constructor notation once NeverDestroyed supports initializer_lists.
>- static NeverDestroyed<Vector<AtomicString>> names = Vector<AtomicString>({
>+ static NeverDestroyed<Vector<AtomString>> names = Vector<AtomString>({
> eventNames().durationchangeEvent,
> eventNames().pauseEvent,
> eventNames().playEvent,
>@@ -401,9 +401,9 @@ const Vector<AtomicString>& PlaybackSessionModelMediaElement::observedEventNames
> return names.get();
> }
> 
>-const AtomicString& PlaybackSessionModelMediaElement::eventNameAll()
>+const AtomString& PlaybackSessionModelMediaElement::eventNameAll()
> {
>- static NeverDestroyed<AtomicString> eventNameAll("allEvents", AtomicString::ConstructFromLiteral);
>+ static NeverDestroyed<AtomString> eventNameAll("allEvents", AtomString::ConstructFromLiteral);
> return eventNameAll;
> }
> 
>@@ -505,7 +505,7 @@ uint64_t PlaybackSessionModelMediaElement::legibleMediaSelectedIndex() const
> if (!host)
> return selectedIndex;
> 
>- AtomicString displayMode = host->captionDisplayMode();
>+ AtomString displayMode = host->captionDisplayMode();
> TextTrack* offItem = host->captionMenuOffItem();
> TextTrack* automaticItem = host->captionMenuAutomaticItem();
> 
>diff --git a/Source/WebCore/platform/cocoa/VideoFullscreenModelVideoElement.h b/Source/WebCore/platform/cocoa/VideoFullscreenModelVideoElement.h
>index bfa29f62e91275b65b6674cd67c3f4c0cd0ddf69..0e9a454b4d88ace35542265bfb00f4167227124e 100644
>--- a/Source/WebCore/platform/cocoa/VideoFullscreenModelVideoElement.h
>+++ b/Source/WebCore/platform/cocoa/VideoFullscreenModelVideoElement.h
>@@ -60,7 +60,7 @@ public:
> WEBCORE_EXPORT void waitForPreparedForInlineThen(WTF::Function<void()>&& completionHandler = [] { });
> 
> WEBCORE_EXPORT void handleEvent(WebCore::ScriptExecutionContext&, WebCore::Event&) override;
>- void updateForEventName(const WTF::AtomicString&);
>+ void updateForEventName(const WTF::AtomString&);
> bool operator==(const EventListener& rhs) const override { return static_cast<const WebCore::EventListener*>(this) == &rhs; }
> 
> WEBCORE_EXPORT void addClient(VideoFullscreenModelClient&) override;
>@@ -87,8 +87,8 @@ private:
> void willExitPictureInPicture() override;
> void didExitPictureInPicture() override;
> 
>- static const Vector<WTF::AtomicString>& observedEventNames();
>- const WTF::AtomicString& eventNameAll();
>+ static const Vector<WTF::AtomString>& observedEventNames();
>+ const WTF::AtomString& eventNameAll();
> 
> RefPtr<HTMLVideoElement> m_videoElement;
> RetainPtr<PlatformLayer> m_videoFullscreenLayer;
>diff --git a/Source/WebCore/platform/cocoa/VideoFullscreenModelVideoElement.mm b/Source/WebCore/platform/cocoa/VideoFullscreenModelVideoElement.mm
>index 936bd95cd03b807a5d84b4a4a8d6b82db0d2a70b..a48807ec3be037a801da8ba9b052e4b4704f873f 100644
>--- a/Source/WebCore/platform/cocoa/VideoFullscreenModelVideoElement.mm
>+++ b/Source/WebCore/platform/cocoa/VideoFullscreenModelVideoElement.mm
>@@ -90,7 +90,7 @@ void VideoFullscreenModelVideoElement::handleEvent(WebCore::ScriptExecutionConte
> updateForEventName(event.type());
> }
> 
>-void VideoFullscreenModelVideoElement::updateForEventName(const WTF::AtomicString& eventName)
>+void VideoFullscreenModelVideoElement::updateForEventName(const WTF::AtomString& eventName)
> {
> if (m_clients.isEmpty())
> return;
>@@ -169,15 +169,15 @@ void VideoFullscreenModelVideoElement::setVideoLayerGravity(MediaPlayerEnums::Vi
> m_videoElement->setVideoFullscreenGravity(gravity);
> }
> 
>-const Vector<AtomicString>& VideoFullscreenModelVideoElement::observedEventNames()
>+const Vector<AtomString>& VideoFullscreenModelVideoElement::observedEventNames()
> {
>- static const auto names = makeNeverDestroyed(Vector<AtomicString> { eventNames().resizeEvent });
>+ static const auto names = makeNeverDestroyed(Vector<AtomString> { eventNames().resizeEvent });
> return names;
> }
> 
>-const AtomicString& VideoFullscreenModelVideoElement::eventNameAll()
>+const AtomString& VideoFullscreenModelVideoElement::eventNameAll()
> {
>- static NeverDestroyed<AtomicString> sEventNameAll = "allEvents";
>+ static NeverDestroyed<AtomString> sEventNameAll = "allEvents";
> return sEventNameAll;
> }
> 
>diff --git a/Source/WebCore/platform/encryptedmedia/CDMInstanceSession.h b/Source/WebCore/platform/encryptedmedia/CDMInstanceSession.h
>index a71ab8ea6a36856f168c36bf756765649d6c1875..8725a31d8bb3e22be21df07e320b36e750386e1a 100644
>--- a/Source/WebCore/platform/encryptedmedia/CDMInstanceSession.h
>+++ b/Source/WebCore/platform/encryptedmedia/CDMInstanceSession.h
>@@ -67,7 +67,7 @@ public:
> };
> 
> using LicenseCallback = CompletionHandler<void(Ref<SharedBuffer>&& message, const String& sessionId, bool needsIndividualization, SuccessValue succeeded)>;
>- virtual void requestLicense(LicenseType, const AtomicString& initDataType, Ref<SharedBuffer>&& initData, LicenseCallback&&) = 0;
>+ virtual void requestLicense(LicenseType, const AtomString& initDataType, Ref<SharedBuffer>&& initData, LicenseCallback&&) = 0;
> 
> using KeyStatusVector = CDMInstanceSessionClient::KeyStatusVector;
> using Message = std::pair<MessageType, Ref<SharedBuffer>>;
>diff --git a/Source/WebCore/platform/encryptedmedia/CDMPrivate.h b/Source/WebCore/platform/encryptedmedia/CDMPrivate.h
>index e058b07712bfe84c4648e8faca37e1f81df2525c..25f7816a2fe1da6f90c2fef777551406aa0f4a03 100644
>--- a/Source/WebCore/platform/encryptedmedia/CDMPrivate.h
>+++ b/Source/WebCore/platform/encryptedmedia/CDMPrivate.h
>@@ -41,7 +41,7 @@ class CDMPrivate {
> public:
> virtual ~CDMPrivate() = default;
> 
>- virtual bool supportsInitDataType(const AtomicString&) const = 0;
>+ virtual bool supportsInitDataType(const AtomString&) const = 0;
> virtual bool supportsConfiguration(const CDMKeySystemConfiguration&) const = 0;
> virtual bool supportsConfigurationWithRestrictions(const CDMKeySystemConfiguration&, const CDMRestrictions&) const = 0;
> virtual bool supportsSessionTypeWithConfiguration(CDMSessionType&, const CDMKeySystemConfiguration&) const = 0;
>@@ -53,7 +53,7 @@ public:
> virtual void loadAndInitialize() = 0;
> virtual bool supportsServerCertificates() const = 0;
> virtual bool supportsSessions() const = 0;
>- virtual bool supportsInitData(const AtomicString&, const SharedBuffer&) const = 0;
>+ virtual bool supportsInitData(const AtomString&, const SharedBuffer&) const = 0;
> virtual RefPtr<SharedBuffer> sanitizeResponse(const SharedBuffer&) const = 0;
> virtual Optional<String> sanitizeSessionId(const String&) const = 0;
> };
>diff --git a/Source/WebCore/platform/encryptedmedia/clearkey/CDMClearKey.cpp b/Source/WebCore/platform/encryptedmedia/clearkey/CDMClearKey.cpp
>index 697699a3a7e4d75d4321137112c5d8f89effde89..503f97b92018da87c248891b22679abb7005b300 100644
>--- a/Source/WebCore/platform/encryptedmedia/clearkey/CDMClearKey.cpp
>+++ b/Source/WebCore/platform/encryptedmedia/clearkey/CDMClearKey.cpp
>@@ -315,7 +315,7 @@ bool CDMFactoryClearKey::supportsKeySystem(const String& keySystem)
> CDMPrivateClearKey::CDMPrivateClearKey() = default;
> CDMPrivateClearKey::~CDMPrivateClearKey() = default;
> 
>-bool CDMPrivateClearKey::supportsInitDataType(const AtomicString& initDataType) const
>+bool CDMPrivateClearKey::supportsInitDataType(const AtomString& initDataType) const
> {
> // `keyids` and 'cenc' are the only supported init data type.
> return (equalLettersIgnoringASCIICase(initDataType, "keyids") || equalLettersIgnoringASCIICase(initDataType, "cenc") || equalLettersIgnoringASCIICase(initDataType, "webm"));
>@@ -419,7 +419,7 @@ bool CDMPrivateClearKey::supportsSessions() const
> return true;
> }
> 
>-bool CDMPrivateClearKey::supportsInitData(const AtomicString& initDataType, const SharedBuffer& initData) const
>+bool CDMPrivateClearKey::supportsInitData(const AtomString& initDataType, const SharedBuffer& initData) const
> {
> // Validate the initData buffer as an JSON object in keyids case.
> if (equalLettersIgnoringASCIICase(initDataType, "keyids") && parseJSONObject(initData))
>@@ -519,7 +519,7 @@ const Vector<CDMInstanceClearKey::Key> CDMInstanceClearKey::keys() const
> return allKeys;
> }
> 
>-void CDMInstanceSessionClearKey::requestLicense(LicenseType, const AtomicString& initDataType, Ref<SharedBuffer>&& initData, LicenseCallback&& callback)
>+void CDMInstanceSessionClearKey::requestLicense(LicenseType, const AtomString& initDataType, Ref<SharedBuffer>&& initData, LicenseCallback&& callback)
> {
> static uint32_t s_sessionIdValue = 0;
> ++s_sessionIdValue;
>diff --git a/Source/WebCore/platform/encryptedmedia/clearkey/CDMClearKey.h b/Source/WebCore/platform/encryptedmedia/clearkey/CDMClearKey.h
>index e3aa0328c1a34111005d677c747387236f439576..d47304c95b26ef204f5da4adcbb8a0864de18bb3 100644
>--- a/Source/WebCore/platform/encryptedmedia/clearkey/CDMClearKey.h
>+++ b/Source/WebCore/platform/encryptedmedia/clearkey/CDMClearKey.h
>@@ -58,7 +58,7 @@ public:
> CDMPrivateClearKey();
> virtual ~CDMPrivateClearKey();
> 
>- bool supportsInitDataType(const AtomicString&) const final;
>+ bool supportsInitDataType(const AtomString&) const final;
> bool supportsConfiguration(const CDMKeySystemConfiguration&) const final;
> bool supportsConfigurationWithRestrictions(const CDMKeySystemConfiguration&, const CDMRestrictions&) const final;
> bool supportsSessionTypeWithConfiguration(CDMSessionType&, const CDMKeySystemConfiguration&) const final;
>@@ -70,7 +70,7 @@ public:
> void loadAndInitialize() final;
> bool supportsServerCertificates() const final;
> bool supportsSessions() const final;
>- bool supportsInitData(const AtomicString&, const SharedBuffer&) const final;
>+ bool supportsInitData(const AtomString&, const SharedBuffer&) const final;
> RefPtr<SharedBuffer> sanitizeResponse(const SharedBuffer&) const final;
> Optional<String> sanitizeSessionId(const String&) const final;
> };
>@@ -104,7 +104,7 @@ private:
> 
> class CDMInstanceSessionClearKey final : public CDMInstanceSession, public CanMakeWeakPtr<CDMInstanceSessionClearKey> {
> public:
>- void requestLicense(LicenseType, const AtomicString& initDataType, Ref<SharedBuffer>&& initData, LicenseCallback&&) final;
>+ void requestLicense(LicenseType, const AtomString& initDataType, Ref<SharedBuffer>&& initData, LicenseCallback&&) final;
> void updateLicense(const String&, LicenseType, const SharedBuffer&, LicenseUpdateCallback&&) final;
> void loadSession(LicenseType, const String&, const String&, LoadSessionCallback&&) final;
> void closeSession(const String&, CloseSessionCallback&&) final;
>diff --git a/Source/WebCore/platform/graphics/Font.cpp b/Source/WebCore/platform/graphics/Font.cpp
>index a743e9cc031744c87392e26574507ed05f311881..184b44b07a412216b9ec598422f0787f0e6c7aeb 100644
>--- a/Source/WebCore/platform/graphics/Font.cpp
>+++ b/Source/WebCore/platform/graphics/Font.cpp
>@@ -39,7 +39,7 @@
> #include "OpenTypeMathData.h"
> #include <wtf/MathExtras.h>
> #include <wtf/NeverDestroyed.h>
>-#include <wtf/text/AtomicStringHash.h>
>+#include <wtf/text/AtomStringHash.h>
> 
> #if ENABLE(OPENTYPE_VERTICAL)
> #include "OpenTypeVerticalData.h"
>@@ -517,7 +517,7 @@ public:
> {
> }
> 
>- CharacterFallbackMapKey(const AtomicString& locale, UChar32 character, IsForPlatformFont isForPlatformFont)
>+ CharacterFallbackMapKey(const AtomString& locale, UChar32 character, IsForPlatformFont isForPlatformFont)
> : locale(locale)
> , character(character)
> , isForPlatformFont(isForPlatformFont == IsForPlatformFont::Yes)
>@@ -541,7 +541,7 @@ public:
> private:
> friend struct CharacterFallbackMapKeyHash;
> 
>- AtomicString locale;
>+ AtomString locale;
> UChar32 character { 0 };
> bool isForPlatformFont { false };
> };
>diff --git a/Source/WebCore/platform/graphics/FontCache.cpp b/Source/WebCore/platform/graphics/FontCache.cpp
>index bf3036fe0ce76135aaa7a772f7291dcb20270743..d2d0b79a5acf0c362f8d59cc3c605364b2c57f93 100644
>--- a/Source/WebCore/platform/graphics/FontCache.cpp
>+++ b/Source/WebCore/platform/graphics/FontCache.cpp
>@@ -39,7 +39,7 @@
> #include <wtf/MemoryPressureHandler.h>
> #include <wtf/NeverDestroyed.h>
> #include <wtf/StdLibExtras.h>
>-#include <wtf/text/AtomicStringHash.h>
>+#include <wtf/text/AtomStringHash.h>
> #include <wtf/text/StringHash.h>
> 
> #if ENABLE(OPENTYPE_VERTICAL)
>@@ -77,7 +77,7 @@ struct FontPlatformDataCacheKey {
> WTF_MAKE_FAST_ALLOCATED;
> public:
> FontPlatformDataCacheKey() { }
>- FontPlatformDataCacheKey(const AtomicString& family, const FontDescription& description, const FontFeatureSettings* fontFaceFeatures, const FontVariantSettings* fontFaceVariantSettings, FontSelectionSpecifiedCapabilities fontFaceCapabilities)
>+ FontPlatformDataCacheKey(const AtomString& family, const FontDescription& description, const FontFeatureSettings* fontFaceFeatures, const FontVariantSettings* fontFaceVariantSettings, FontSelectionSpecifiedCapabilities fontFaceCapabilities)
> : m_fontDescriptionKey(description)
> , m_family(family)
> , m_fontFaceFeatures(fontFaceFeatures ? *fontFaceFeatures : FontFeatureSettings())
>@@ -106,7 +106,7 @@ public:
> }
> 
> FontDescriptionKey m_fontDescriptionKey;
>- AtomicString m_family;
>+ AtomString m_family;
> FontFeatureSettings m_fontFaceFeatures;
> FontVariantSettings m_fontFaceVariantSettings;
> FontSelectionSpecifiedCapabilities m_fontFaceCapabilities;
>@@ -155,16 +155,16 @@ static FontPlatformDataCache& fontPlatformDataCache()
> return cache;
> }
> 
>-const AtomicString& FontCache::alternateFamilyName(const AtomicString& familyName)
>+const AtomString& FontCache::alternateFamilyName(const AtomString& familyName)
> {
>- static NeverDestroyed<AtomicString> arial("Arial", AtomicString::ConstructFromLiteral);
>- static NeverDestroyed<AtomicString> courier("Courier", AtomicString::ConstructFromLiteral);
>- static NeverDestroyed<AtomicString> courierNew("Courier New", AtomicString::ConstructFromLiteral);
>- static NeverDestroyed<AtomicString> helvetica("Helvetica", AtomicString::ConstructFromLiteral);
>- static NeverDestroyed<AtomicString> times("Times", AtomicString::ConstructFromLiteral);
>- static NeverDestroyed<AtomicString> timesNewRoman("Times New Roman", AtomicString::ConstructFromLiteral);
>-
>- const AtomicString& platformSpecificAlternate = platformAlternateFamilyName(familyName);
>+ static NeverDestroyed<AtomString> arial("Arial", AtomString::ConstructFromLiteral);
>+ static NeverDestroyed<AtomString> courier("Courier", AtomString::ConstructFromLiteral);
>+ static NeverDestroyed<AtomString> courierNew("Courier New", AtomString::ConstructFromLiteral);
>+ static NeverDestroyed<AtomString> helvetica("Helvetica", AtomString::ConstructFromLiteral);
>+ static NeverDestroyed<AtomString> times("Times", AtomString::ConstructFromLiteral);
>+ static NeverDestroyed<AtomString> timesNewRoman("Times New Roman", AtomString::ConstructFromLiteral);
>+
>+ const AtomString& platformSpecificAlternate = platformAlternateFamilyName(familyName);
> if (!platformSpecificAlternate.isNull())
> return platformSpecificAlternate;
> 
>@@ -203,7 +203,7 @@ const AtomicString& FontCache::alternateFamilyName(const AtomicString& familyNam
> return nullAtom();
> }
> 
>-FontPlatformData* FontCache::getCachedFontPlatformData(const FontDescription& fontDescription, const AtomicString& passedFamilyName,
>+FontPlatformData* FontCache::getCachedFontPlatformData(const FontDescription& fontDescription, const AtomString& passedFamilyName,
> const FontFeatureSettings* fontFaceFeatures, const FontVariantSettings* fontFaceVariantSettings, FontSelectionSpecifiedCapabilities fontFaceCapabilities, bool checkingAlternateName)
> {
> #if PLATFORM(IOS_FAMILY)
>@@ -214,10 +214,10 @@ FontPlatformData* FontCache::getCachedFontPlatformData(const FontDescription& fo
> // Leading "@" in the font name enables Windows vertical flow flag for the font.
> // Because we do vertical flow by ourselves, we don't want to use the Windows feature.
> // IE disregards "@" regardless of the orientatoin, so we follow the behavior.
>- const AtomicString& familyName = (passedFamilyName.isEmpty() || passedFamilyName[0] != '@') ?
>- passedFamilyName : AtomicString(passedFamilyName.impl()->substring(1));
>+ const AtomString& familyName = (passedFamilyName.isEmpty() || passedFamilyName[0] != '@') ?
>+ passedFamilyName : AtomString(passedFamilyName.impl()->substring(1));
> #else
>- const AtomicString& familyName = passedFamilyName;
>+ const AtomString& familyName = passedFamilyName;
> #endif
> 
> static bool initialized;
>@@ -236,7 +236,7 @@ FontPlatformData* FontCache::getCachedFontPlatformData(const FontDescription& fo
> if (!it->value && !checkingAlternateName) {
> // We were unable to find a font. We have a small set of fonts that we alias to other names,
> // e.g., Arial/Helvetica, Courier/Courier New, etc. Try looking up the font under the aliased name.
>- const AtomicString& alternateName = alternateFamilyName(familyName);
>+ const AtomString& alternateName = alternateFamilyName(familyName);
> if (!alternateName.isNull()) {
> FontPlatformData* fontPlatformDataForAlternateName = getCachedFontPlatformData(fontDescription, alternateName, fontFaceFeatures, fontFaceVariantSettings, fontFaceCapabilities, true);
> // Lookup the key in the hash table again as the previous iterator may have
>@@ -320,7 +320,7 @@ const unsigned cTargetInactiveFontData = 200;
> const unsigned cMaxUnderMemoryPressureInactiveFontData = 50;
> const unsigned cTargetUnderMemoryPressureInactiveFontData = 30;
> 
>-RefPtr FontCache::fontForFamily(const FontDescription& fontDescription, const AtomicString& family, const FontFeatureSettings* fontFaceFeatures, const FontVariantSettings* fontFaceVariantSettings, FontSelectionSpecifiedCapabilities fontFaceCapabilities, bool checkingAlternateName)
>+RefPtr FontCache::fontForFamily(const FontDescription& fontDescription, const AtomString& family, const FontFeatureSettings* fontFaceFeatures, const FontVariantSettings* fontFaceVariantSettings, FontSelectionSpecifiedCapabilities fontFaceCapabilities, bool checkingAlternateName)
> {
> if (!m_purgeTimer.isActive())
> m_purgeTimer.startOneShot(0_s);
>@@ -492,7 +492,7 @@ void FontCache::prewarm(const PrewarmInformation&)
> {
> }
> 
>-RefPtr FontCache::similarFont(const FontDescription&, const AtomicString&)
>+RefPtr FontCache::similarFont(const FontDescription&, const AtomString&)
> {
> return nullptr;
> }
>diff --git a/Source/WebCore/platform/graphics/FontCache.h b/Source/WebCore/platform/graphics/FontCache.h
>index 5aa41df9525027b3df529681ae1e356e5e1e9315..f65bf3ac14b0adf586755ca79949d9bd28dc76d6 100644
>--- a/Source/WebCore/platform/graphics/FontCache.h
>+++ b/Source/WebCore/platform/graphics/FontCache.h
>@@ -40,7 +40,7 @@
> #include <wtf/RefPtr.h>
> #include <wtf/Vector.h>
> #include <wtf/WorkQueue.h>
>-#include <wtf/text/AtomicStringHash.h>
>+#include <wtf/text/AtomStringHash.h>
> #include <wtf/text/WTFString.h>
> 
> #if PLATFORM(COCOA)
>@@ -162,7 +162,7 @@ private:
> unsigned m_size { 0 };
> FontSelectionRequest m_fontSelectionRequest;
> std::array<unsigned, 2> m_flags {{ 0, 0 }};
>- AtomicString m_locale;
>+ AtomString m_locale;
> FontFeatureSettings m_featureSettings;
> #if ENABLE(VARIATION_FONTS)
> FontVariationSettings m_variationSettings;
>@@ -208,12 +208,12 @@ public:
> 
> // This function exists so CSSFontSelector can have a unified notion of preinstalled fonts and @font-face.
> // It comes into play when you create an @font-face which shares a family name as a preinstalled font.
>- Vector<FontSelectionCapabilities> getFontSelectionCapabilitiesInFamily(const AtomicString&, AllowUserInstalledFonts);
>+ Vector<FontSelectionCapabilities> getFontSelectionCapabilitiesInFamily(const AtomString&, AllowUserInstalledFonts);
> 
>- WEBCORE_EXPORT RefPtr fontForFamily(const FontDescription&, const AtomicString&, const FontFeatureSettings* fontFaceFeatures = nullptr, const FontVariantSettings* fontFaceVariantSettings = nullptr, FontSelectionSpecifiedCapabilities fontFaceCapabilities = { }, bool checkingAlternateName = false);
>+ WEBCORE_EXPORT RefPtr fontForFamily(const FontDescription&, const AtomString&, const FontFeatureSettings* fontFaceFeatures = nullptr, const FontVariantSettings* fontFaceVariantSettings = nullptr, FontSelectionSpecifiedCapabilities fontFaceCapabilities = { }, bool checkingAlternateName = false);
> WEBCORE_EXPORT Ref lastResortFallbackFont(const FontDescription&);
> WEBCORE_EXPORT Ref fontForPlatformData(const FontPlatformData&);
>- RefPtr similarFont(const FontDescription&, const AtomicString& family);
>+ RefPtr similarFont(const FontDescription&, const AtomString& family);
> 
> void addClient(FontSelector&);
> void removeClient(FontSelector&);
>@@ -227,14 +227,14 @@ public:
> void platformPurgeInactiveFontData();
> 
> #if PLATFORM(WIN)
>- RefPtr fontFromDescriptionAndLogFont(const FontDescription&, const LOGFONT&, AtomicString& outFontFamilyName);
>+ RefPtr fontFromDescriptionAndLogFont(const FontDescription&, const LOGFONT&, AtomString& outFontFamilyName);
> #endif
> 
> #if ENABLE(OPENTYPE_VERTICAL)
> RefPtr<OpenTypeVerticalData> verticalData(const FontPlatformData&);
> #endif
> 
>- std::unique_ptr<FontPlatformData> createFontPlatformDataForTesting(const FontDescription&, const AtomicString& family);
>+ std::unique_ptr<FontPlatformData> createFontPlatformDataForTesting(const FontDescription&, const AtomString& family);
> 
> bool shouldMockBoldSystemFontForAccessibility() const { return m_shouldMockBoldSystemFontForAccessibility; }
> void setShouldMockBoldSystemFontForAccessibility(bool shouldMockBoldSystemFontForAccessibility) { m_shouldMockBoldSystemFontForAccessibility = shouldMockBoldSystemFontForAccessibility; }
>@@ -259,16 +259,16 @@ private:
> WEBCORE_EXPORT void purgeInactiveFontDataIfNeeded();
> 
> // FIXME: This method should eventually be removed.
>- FontPlatformData* getCachedFontPlatformData(const FontDescription&, const AtomicString& family, const FontFeatureSettings* fontFaceFeatures = nullptr, const FontVariantSettings* fontFaceVariantSettings = nullptr, FontSelectionSpecifiedCapabilities fontFaceCapabilities = { }, bool checkingAlternateName = false);
>+ FontPlatformData* getCachedFontPlatformData(const FontDescription&, const AtomString& family, const FontFeatureSettings* fontFaceFeatures = nullptr, const FontVariantSettings* fontFaceVariantSettings = nullptr, FontSelectionSpecifiedCapabilities fontFaceCapabilities = { }, bool checkingAlternateName = false);
> 
> // These methods are implemented by each platform.
> #if PLATFORM(COCOA)
> FontPlatformData* getCustomFallbackFont(const UInt32, const FontDescription&);
> #endif
>- WEBCORE_EXPORT std::unique_ptr<FontPlatformData> createFontPlatformData(const FontDescription&, const AtomicString& family, const FontFeatureSettings* fontFaceFeatures, const FontVariantSettings* fontFaceVariantSettings, FontSelectionSpecifiedCapabilities fontFaceCapabilities);
>+ WEBCORE_EXPORT std::unique_ptr<FontPlatformData> createFontPlatformData(const FontDescription&, const AtomString& family, const FontFeatureSettings* fontFaceFeatures, const FontVariantSettings* fontFaceVariantSettings, FontSelectionSpecifiedCapabilities fontFaceCapabilities);
> 
>- static const AtomicString& alternateFamilyName(const AtomicString&);
>- static const AtomicString& platformAlternateFamilyName(const AtomicString&);
>+ static const AtomString& alternateFamilyName(const AtomString&);
>+ static const AtomString& platformAlternateFamilyName(const AtomString&);
> 
> Timer m_purgeTimer;
> 
>@@ -284,7 +284,7 @@ private:
> friend class Font;
> };
> 
>-inline std::unique_ptr<FontPlatformData> FontCache::createFontPlatformDataForTesting(const FontDescription& fontDescription, const AtomicString& family)
>+inline std::unique_ptr<FontPlatformData> FontCache::createFontPlatformDataForTesting(const FontDescription& fontDescription, const AtomString& family)
> {
> return createFontPlatformData(fontDescription, family, nullptr, nullptr, { });
> }
>diff --git a/Source/WebCore/platform/graphics/FontCascade.cpp b/Source/WebCore/platform/graphics/FontCascade.cpp
>index b99179a4f598e57d1bf03194e623fb559d58ff9c..7274db0db32b3b41b3e0e1b1ed0fb2aea8b36a3b 100644
>--- a/Source/WebCore/platform/graphics/FontCascade.cpp
>+++ b/Source/WebCore/platform/graphics/FontCascade.cpp
>@@ -38,7 +38,7 @@
> #include <wtf/MainThread.h>
> #include <wtf/MathExtras.h>
> #include <wtf/NeverDestroyed.h>
>-#include <wtf/text/AtomicStringHash.h>
>+#include <wtf/text/AtomStringHash.h>
> #include <wtf/text/StringBuilder.h>
> 
> #if PLATFORM(WIN)
>@@ -49,17 +49,17 @@ namespace WebCore {
> 
> using namespace WTF::Unicode;
> 
>-static bool useBackslashAsYenSignForFamily(const AtomicString& family)
>+static bool useBackslashAsYenSignForFamily(const AtomString& family)
> {
> if (family.isEmpty())
> return false;
> static const auto set = makeNeverDestroyed([] {
>- HashSet<AtomicString> set;
>+ HashSet<AtomString> set;
> auto add = [&set] (const char* name, std::initializer_list<UChar> unicodeName) {
> unsigned nameLength = strlen(name);
>- set.add(AtomicString { name, nameLength, AtomicString::ConstructFromLiteral });
>+ set.add(AtomString { name, nameLength, AtomString::ConstructFromLiteral });
> unsigned unicodeNameLength = unicodeName.size();
>- set.add(AtomicString { unicodeName.begin(), unicodeNameLength });
>+ set.add(AtomString { unicodeName.begin(), unicodeNameLength });
> };
> add("MS PGothic", { 0xFF2D, 0xFF33, 0x0020, 0xFF30, 0x30B4, 0x30B7, 0x30C3, 0x30AF });
> add("MS PMincho", { 0xFF2D, 0xFF33, 0x0020, 0xFF30, 0x660E, 0x671D });
>@@ -152,7 +152,7 @@ bool FontCascade::operator==(const FontCascade& other) const
> 
> struct FontCascadeCacheKey {
> FontDescriptionKey fontDescriptionKey; // Shared with the lower level FontCache (caching Font objects)
>- Vector<AtomicString, 3> families;
>+ Vector<AtomString, 3> families;
> unsigned fontSelectorId;
> unsigned fontSelectorVersion;
> };
>@@ -298,7 +298,7 @@ float FontCascade::drawText(GraphicsContext& context, const TextRun& run, const
> return startPoint.x() - startX;
> }
> 
>-void FontCascade::drawEmphasisMarks(GraphicsContext& context, const TextRun& run, const AtomicString& mark, const FloatPoint& point, unsigned from, Optional<unsigned> to) const
>+void FontCascade::drawEmphasisMarks(GraphicsContext& context, const TextRun& run, const AtomString& mark, const FloatPoint& point, unsigned from, Optional<unsigned> to) const
> {
> if (isLoadingCustomFonts())
> return;
>@@ -486,7 +486,7 @@ GlyphData FontCascade::glyphDataForCharacter(UChar32 c, bool mirror, FontVariant
> // all platforms.
> bool FontCascade::hasValidAverageCharWidth() const
> {
>- const AtomicString& family = firstFamily();
>+ const AtomString& family = firstFamily();
> if (family.isEmpty())
> return false;
> 
>@@ -496,7 +496,7 @@ bool FontCascade::hasValidAverageCharWidth() const
> return false;
> #endif
> 
>- static const auto map = makeNeverDestroyed(HashSet<AtomicString> {
>+ static const auto map = makeNeverDestroyed(HashSet<AtomString> {
> "American Typewriter",
> "Arial Hebrew",
> "Chalkboard",
>@@ -1307,7 +1307,7 @@ static GlyphUnderlineType computeUnderlineType(const TextRun& textRun, const Gly
> 
> // FIXME: This function may not work if the emphasis mark uses a complex script, but none of the
> // standard emphasis marks do so.
>-Optional<GlyphData> FontCascade::getEmphasisMarkGlyphData(const AtomicString& mark) const
>+Optional<GlyphData> FontCascade::getEmphasisMarkGlyphData(const AtomString& mark) const
> {
> if (mark.isEmpty())
> return WTF::nullopt;
>@@ -1325,7 +1325,7 @@ Optional<GlyphData> FontCascade::getEmphasisMarkGlyphData(const AtomicString& ma
> return glyphData.value().isValid() ? glyphData : WTF::nullopt;
> }
> 
>-int FontCascade::emphasisMarkAscent(const AtomicString& mark) const
>+int FontCascade::emphasisMarkAscent(const AtomString& mark) const
> {
> Optional<GlyphData> markGlyphData = getEmphasisMarkGlyphData(mark);
> if (!markGlyphData)
>@@ -1339,7 +1339,7 @@ int FontCascade::emphasisMarkAscent(const AtomicString& mark) const
> return markFontData->fontMetrics().ascent();
> }
> 
>-int FontCascade::emphasisMarkDescent(const AtomicString& mark) const
>+int FontCascade::emphasisMarkDescent(const AtomString& mark) const
> {
> Optional<GlyphData> markGlyphData = getEmphasisMarkGlyphData(mark);
> if (!markGlyphData)
>@@ -1353,7 +1353,7 @@ int FontCascade::emphasisMarkDescent(const AtomicString& mark) const
> return markFontData->fontMetrics().descent();
> }
> 
>-int FontCascade::emphasisMarkHeight(const AtomicString& mark) const
>+int FontCascade::emphasisMarkHeight(const AtomString& mark) const
> {
> Optional<GlyphData> markGlyphData = getEmphasisMarkGlyphData(mark);
> if (!markGlyphData)
>@@ -1429,7 +1429,7 @@ float FontCascade::getGlyphsAndAdvancesForComplexText(const TextRun& run, unsign
> }
> #endif
> 
>-void FontCascade::drawEmphasisMarksForSimpleText(GraphicsContext& context, const TextRun& run, const AtomicString& mark, const FloatPoint& point, unsigned from, unsigned to) const
>+void FontCascade::drawEmphasisMarksForSimpleText(GraphicsContext& context, const TextRun& run, const AtomString& mark, const FloatPoint& point, unsigned from, unsigned to) const
> {
> GlyphBuffer glyphBuffer;
> float initialAdvance = getGlyphsAndAdvancesForSimpleText(run, from, to, glyphBuffer, ForTextEmphasis);
>@@ -1500,7 +1500,7 @@ inline static float offsetToMiddleOfGlyphAtIndex(const GlyphBuffer& glyphBuffer,
> return offsetToMiddleOfGlyph(glyphBuffer.fontAt(i), glyphBuffer.glyphAt(i));
> }
> 
>-void FontCascade::drawEmphasisMarks(GraphicsContext& context, const GlyphBuffer& glyphBuffer, const AtomicString& mark, const FloatPoint& point) const
>+void FontCascade::drawEmphasisMarks(GraphicsContext& context, const GlyphBuffer& glyphBuffer, const AtomString& mark, const FloatPoint& point) const
> {
> Optional<GlyphData> markGlyphData = getEmphasisMarkGlyphData(mark);
> if (!markGlyphData)
>@@ -1661,7 +1661,7 @@ const Font* FontCascade::fontForCombiningCharacterSequence(const UChar* characte
> }
> #endif
> 
>-void FontCascade::drawEmphasisMarksForComplexText(GraphicsContext& context, const TextRun& run, const AtomicString& mark, const FloatPoint& point, unsigned from, unsigned to) const
>+void FontCascade::drawEmphasisMarksForComplexText(GraphicsContext& context, const TextRun& run, const AtomString& mark, const FloatPoint& point, unsigned from, unsigned to) const
> {
> GlyphBuffer glyphBuffer;
> float initialAdvance = getGlyphsAndAdvancesForComplexText(run, from, to, glyphBuffer, ForTextEmphasis);
>diff --git a/Source/WebCore/platform/graphics/FontCascade.h b/Source/WebCore/platform/graphics/FontCascade.h
>index 22be5ea21610a04256137802200106751d30260c..2bcdf106e6c4d6b3c94775d2dd8ee9468f95f6cd 100644
>--- a/Source/WebCore/platform/graphics/FontCascade.h
>+++ b/Source/WebCore/platform/graphics/FontCascade.h
>@@ -109,7 +109,7 @@ public:
> enum CustomFontNotReadyAction { DoNotPaintIfFontNotReady, UseFallbackIfFontNotReady };
> WEBCORE_EXPORT float drawText(GraphicsContext&, const TextRun&, const FloatPoint&, unsigned from = 0, Optional<unsigned> to = WTF::nullopt, CustomFontNotReadyAction = DoNotPaintIfFontNotReady) const;
> static void drawGlyphs(GraphicsContext&, const Font&, const GlyphBuffer&, unsigned from, unsigned numGlyphs, const FloatPoint&, FontSmoothingMode);
>- void drawEmphasisMarks(GraphicsContext&, const TextRun&, const AtomicString& mark, const FloatPoint&, unsigned from = 0, Optional<unsigned> to = WTF::nullopt) const;
>+ void drawEmphasisMarks(GraphicsContext&, const TextRun&, const AtomString& mark, const FloatPoint&, unsigned from = 0, Optional<unsigned> to = WTF::nullopt) const;
> 
> DashArray dashesForIntersectionsWithRect(const TextRun&, const FloatPoint& textOrigin, const FloatRect& lineExtents) const;
> 
>@@ -136,9 +136,9 @@ public:
> bool enableKerning() const { return m_enableKerning; }
> bool requiresShaping() const { return m_requiresShaping; }
> 
>- const AtomicString& firstFamily() const { return m_fontDescription.firstFamily(); }
>+ const AtomString& firstFamily() const { return m_fontDescription.firstFamily(); }
> unsigned familyCount() const { return m_fontDescription.familyCount(); }
>- const AtomicString& familyAt(unsigned i) const { return m_fontDescription.familyAt(i); }
>+ const AtomString& familyAt(unsigned i) const { return m_fontDescription.familyAt(i); }
> 
> // A WTF::nullopt return value indicates "font-style: normal".
> Optional<FontSelectionValue> italic() const { return m_fontDescription.italic(); }
>@@ -154,9 +154,9 @@ public:
> bool hasValidAverageCharWidth() const;
> bool fastAverageCharWidthIfAvailable(float &width) const; // returns true on success
> 
>- int emphasisMarkAscent(const AtomicString&) const;
>- int emphasisMarkDescent(const AtomicString&) const;
>- int emphasisMarkHeight(const AtomicString&) const;
>+ int emphasisMarkAscent(const AtomString&) const;
>+ int emphasisMarkDescent(const AtomString&) const;
>+ int emphasisMarkHeight(const AtomString&) const;
> 
> const Font& primaryFont() const;
> const FontRanges& fallbackRangesAt(unsigned) const;
>@@ -206,21 +206,21 @@ private:
> float glyphBufferForTextRun(CodePath, const TextRun&, unsigned from, unsigned to, GlyphBuffer&) const;
> // Returns the initial in-stream advance.
> float getGlyphsAndAdvancesForSimpleText(const TextRun&, unsigned from, unsigned to, GlyphBuffer&, ForTextEmphasisOrNot = NotForTextEmphasis) const;
>- void drawEmphasisMarksForSimpleText(GraphicsContext&, const TextRun&, const AtomicString& mark, const FloatPoint&, unsigned from, unsigned to) const;
>+ void drawEmphasisMarksForSimpleText(GraphicsContext&, const TextRun&, const AtomString& mark, const FloatPoint&, unsigned from, unsigned to) const;
> void drawGlyphBuffer(GraphicsContext&, const GlyphBuffer&, FloatPoint&, CustomFontNotReadyAction) const;
>- void drawEmphasisMarks(GraphicsContext&, const GlyphBuffer&, const AtomicString&, const FloatPoint&) const;
>+ void drawEmphasisMarks(GraphicsContext&, const GlyphBuffer&, const AtomString&, const FloatPoint&) const;
> float floatWidthForSimpleText(const TextRun&, HashSet<const Font*>* fallbackFonts = 0, GlyphOverflow* = 0) const;
> int offsetForPositionForSimpleText(const TextRun&, float position, bool includePartialGlyphs) const;
> void adjustSelectionRectForSimpleText(const TextRun&, LayoutRect& selectionRect, unsigned from, unsigned to) const;
> 
>- Optional<GlyphData> getEmphasisMarkGlyphData(const AtomicString&) const;
>+ Optional<GlyphData> getEmphasisMarkGlyphData(const AtomString&) const;
> 
> static bool canReturnFallbackFontsForComplexText();
> static bool canExpandAroundIdeographsInComplexText();
> 
> // Returns the initial in-stream advance.
> float getGlyphsAndAdvancesForComplexText(const TextRun&, unsigned from, unsigned to, GlyphBuffer&, ForTextEmphasisOrNot = NotForTextEmphasis) const;
>- void drawEmphasisMarksForComplexText(GraphicsContext&, const TextRun&, const AtomicString& mark, const FloatPoint&, unsigned from, unsigned to) const;
>+ void drawEmphasisMarksForComplexText(GraphicsContext&, const TextRun&, const AtomString& mark, const FloatPoint&, unsigned from, unsigned to) const;
> float floatWidthForComplexText(const TextRun&, HashSet<const Font*>* fallbackFonts = 0, GlyphOverflow* = 0) const;
> int offsetForPositionForComplexText(const TextRun&, float position, bool includePartialGlyphs) const;
> void adjustSelectionRectForComplexText(const TextRun&, LayoutRect& selectionRect, unsigned from, unsigned to) const;
>diff --git a/Source/WebCore/platform/graphics/FontCascadeDescription.cpp b/Source/WebCore/platform/graphics/FontCascadeDescription.cpp
>index 3fc96bff9cdf3a57047d73180cdd931d3a8733d0..34e5b8fce99bfbe67c25631741be968a74671308 100644
>--- a/Source/WebCore/platform/graphics/FontCascadeDescription.cpp
>+++ b/Source/WebCore/platform/graphics/FontCascadeDescription.cpp
>@@ -41,7 +41,7 @@ struct SameSizeAsFontCascadeDescription {
> #else
> char c;
> #endif
>- AtomicString string;
>+ AtomString string;
> int16_t fontSelectionRequest[3];
> float size;
> unsigned bitfields1;
>@@ -118,7 +118,7 @@ bool FontCascadeDescription::familiesEqualForTextAutoSizing(const FontCascadeDes
> 
> #endif // ENABLE(TEXT_AUTOSIZING)
> 
>-bool FontCascadeDescription::familyNamesAreEqual(const AtomicString& family1, const AtomicString& family2)
>+bool FontCascadeDescription::familyNamesAreEqual(const AtomString& family1, const AtomString& family2)
> {
> #if PLATFORM(COCOA)
> if (family1.startsWith('.'))
>@@ -127,7 +127,7 @@ bool FontCascadeDescription::familyNamesAreEqual(const AtomicString& family1, co
> return ASCIICaseInsensitiveHash::equal(family1, family2);
> }
> 
>-unsigned FontCascadeDescription::familyNameHash(const AtomicString& family)
>+unsigned FontCascadeDescription::familyNameHash(const AtomString& family)
> {
> #if PLATFORM(COCOA)
> if (family.startsWith('.'))
>diff --git a/Source/WebCore/platform/graphics/FontCascadeDescription.h b/Source/WebCore/platform/graphics/FontCascadeDescription.h
>index 0d51c5a1819549b42f4563842c562b1561c9abda..5b04052fa655db81809832be1f154c16c629b08d 100644
>--- a/Source/WebCore/platform/graphics/FontCascadeDescription.h
>+++ b/Source/WebCore/platform/graphics/FontCascadeDescription.h
>@@ -43,7 +43,7 @@ typedef FontFamilySpecificationCoreText FontFamilyPlatformSpecification;
> typedef FontFamilySpecificationNull FontFamilyPlatformSpecification;
> #endif
> 
>-typedef Variant<AtomicString, FontFamilyPlatformSpecification> FontFamilySpecification;
>+typedef Variant<AtomString, FontFamilyPlatformSpecification> FontFamilySpecification;
> 
> class FontCascadeDescription : public FontDescription {
> public:
>@@ -53,12 +53,12 @@ public:
> bool operator!=(const FontCascadeDescription& other) const { return !(*this == other); }
> 
> unsigned familyCount() const { return m_families.size(); }
>- const AtomicString& firstFamily() const { return familyAt(0); }
>- const AtomicString& familyAt(unsigned i) const { return m_families[i]; }
>- const RefCountedArray<AtomicString>& families() const { return m_families; }
>+ const AtomString& firstFamily() const { return familyAt(0); }
>+ const AtomString& familyAt(unsigned i) const { return m_families[i]; }
>+ const RefCountedArray<AtomString>& families() const { return m_families; }
> 
>- static bool familyNamesAreEqual(const AtomicString&, const AtomicString&);
>- static unsigned familyNameHash(const AtomicString&);
>+ static bool familyNamesAreEqual(const AtomString&, const AtomString&);
>+ static unsigned familyNameHash(const AtomString&);
> static String foldedFamilyName(const String&);
> 
> unsigned effectiveFamilyCount() const;
>@@ -85,9 +85,9 @@ public:
> FontSmoothingMode fontSmoothing() const { return static_cast<FontSmoothingMode>(m_fontSmoothing); }
> bool isSpecifiedFont() const { return m_isSpecifiedFont; }
> 
>- void setOneFamily(const AtomicString& family) { ASSERT(m_families.size() == 1); m_families[0] = family; }
>- void setFamilies(const Vector<AtomicString>& families) { m_families = RefCountedArray<AtomicString>(families); }
>- void setFamilies(const RefCountedArray<AtomicString>& families) { m_families = families; }
>+ void setOneFamily(const AtomString& family) { ASSERT(m_families.size() == 1); m_families[0] = family; }
>+ void setFamilies(const Vector<AtomString>& families) { m_families = RefCountedArray<AtomString>(families); }
>+ void setFamilies(const RefCountedArray<AtomString>& families) { m_families = families; }
> void setSpecifiedSize(float s) { m_specifiedSize = clampToFloat(s); }
> void setIsAbsoluteSize(bool s) { m_isAbsoluteSize = s; }
> void setKerning(Kerning kerning) { m_kerning = static_cast<unsigned>(kerning); }
>@@ -132,10 +132,10 @@ public:
> static FontVariantCaps initialVariantCaps() { return FontVariantCaps::Normal; }
> static FontVariantAlternates initialVariantAlternates() { return FontVariantAlternates::Normal; }
> static FontOpticalSizing initialOpticalSizing() { return FontOpticalSizing::Enabled; }
>- static const AtomicString& initialLocale() { return nullAtom(); }
>+ static const AtomString& initialLocale() { return nullAtom(); }
> 
> private:
>- RefCountedArray<AtomicString> m_families { 1 };
>+ RefCountedArray<AtomString> m_families { 1 };
> 
> // Specified CSS value. Independent of rendering issues such as integer rounding, minimum font sizes, and zooming.
> float m_specifiedSize { 0 };
>diff --git a/Source/WebCore/platform/graphics/FontCascadeFonts.cpp b/Source/WebCore/platform/graphics/FontCascadeFonts.cpp
>index a9f41e1773b0014d5cbbd2f7ee1446dad4dd821d..694469c0eb62ad9c84e9bbd08fa13426409069a9 100644
>--- a/Source/WebCore/platform/graphics/FontCascadeFonts.cpp
>+++ b/Source/WebCore/platform/graphics/FontCascadeFonts.cpp
>@@ -140,7 +140,7 @@ static FontRanges realizeNextFallback(const FontCascadeDescription& description,
> 
> auto& fontCache = FontCache::singleton();
> while (index < description.effectiveFamilyCount()) {
>- auto visitor = WTF::makeVisitor([&](const AtomicString& family) -> FontRanges {
>+ auto visitor = WTF::makeVisitor([&](const AtomString& family) -> FontRanges {
> if (family.isEmpty())
> return FontRanges();
> if (fontSelector) {
>diff --git a/Source/WebCore/platform/graphics/FontDescription.cpp b/Source/WebCore/platform/graphics/FontDescription.cpp
>index b8b46e775cd91b1c6fee68c142298450ec2d60cf..8a924f9a650c44d7ef05879ad3fe5175e2fd0896 100644
>--- a/Source/WebCore/platform/graphics/FontDescription.cpp
>+++ b/Source/WebCore/platform/graphics/FontDescription.cpp
>@@ -65,14 +65,14 @@ FontDescription::FontDescription()
> {
> }
> 
>-void FontDescription::setLocale(const AtomicString& locale)
>+void FontDescription::setLocale(const AtomString& locale)
> {
> m_locale = locale;
> m_script = localeToScriptCodeForFontSelection(m_locale);
> }
> 
> #if !PLATFORM(COCOA)
>-AtomicString FontDescription::platformResolveGenericFamily(UScriptCode, const AtomicString&, const AtomicString&)
>+AtomString FontDescription::platformResolveGenericFamily(UScriptCode, const AtomString&, const AtomString&)
> {
> return nullAtom();
> }
>diff --git a/Source/WebCore/platform/graphics/FontDescription.h b/Source/WebCore/platform/graphics/FontDescription.h
>index cb05cf5aeb9557851b4f309be6edb4ce6328d05f..18f1de187f51f1cc7c7ca08f9a88193db8274567 100644
>--- a/Source/WebCore/platform/graphics/FontDescription.h
>+++ b/Source/WebCore/platform/graphics/FontDescription.h
>@@ -53,7 +53,7 @@ public:
> FontRenderingMode renderingMode() const { return static_cast<FontRenderingMode>(m_renderingMode); }
> TextRenderingMode textRenderingMode() const { return static_cast<TextRenderingMode>(m_textRendering); }
> UScriptCode script() const { return static_cast<UScriptCode>(m_script); }
>- const AtomicString& locale() const { return m_locale; }
>+ const AtomString& locale() const { return m_locale; }
> 
> FontOrientation orientation() const { return static_cast<FontOrientation>(m_orientation); }
> NonCJKGlyphOrientation nonCJKGlyphOrientation() const { return static_cast<NonCJKGlyphOrientation>(m_nonCJKGlyphOrientation); }
>@@ -108,7 +108,7 @@ public:
> void setOrientation(FontOrientation orientation) { m_orientation = static_cast<unsigned>(orientation); }
> void setNonCJKGlyphOrientation(NonCJKGlyphOrientation orientation) { m_nonCJKGlyphOrientation = static_cast<unsigned>(orientation); }
> void setWidthVariant(FontWidthVariant widthVariant) { m_widthVariant = static_cast<unsigned>(widthVariant); } // Make sure new callers of this sync with FontPlatformData::isForTextCombine()!
>- void setLocale(const AtomicString&);
>+ void setLocale(const AtomString&);
> void setFeatureSettings(FontFeatureSettings&& settings) { m_featureSettings = WTFMove(settings); }
> #if ENABLE(VARIATION_FONTS)
> void setVariationSettings(FontVariationSettings&& settings) { m_variationSettings = WTFMove(settings); }
>@@ -133,13 +133,13 @@ public:
> void setFontStyleAxis(FontStyleAxis axis) { m_fontStyleAxis = axis == FontStyleAxis::ital; }
> void setShouldAllowUserInstalledFonts(AllowUserInstalledFonts shouldAllowUserInstalledFonts) { m_shouldAllowUserInstalledFonts = static_cast<unsigned>(shouldAllowUserInstalledFonts); }
> 
>- static AtomicString platformResolveGenericFamily(UScriptCode, const AtomicString& locale, const AtomicString& familyName);
>+ static AtomString platformResolveGenericFamily(UScriptCode, const AtomString& locale, const AtomString& familyName);
> 
> private:
> // FIXME: Investigate moving these into their own object on the heap (to save memory).
> FontFeatureSettings m_featureSettings;
> FontVariationSettings m_variationSettings;
>- AtomicString m_locale;
>+ AtomString m_locale;
> 
> FontSelectionRequest m_fontSelectionRequest;
> float m_computedSize { 0 }; // Computed size adjusted for the minimum font size and the zoom factor.
>diff --git a/Source/WebCore/platform/graphics/FontFamilySpecificationNull.cpp b/Source/WebCore/platform/graphics/FontFamilySpecificationNull.cpp
>index 15c0387698260f405e22e5bf527800308c7fe3bf..81ba158d97b082d6cdfbf0c3215d7d24eef09157 100644
>--- a/Source/WebCore/platform/graphics/FontFamilySpecificationNull.cpp
>+++ b/Source/WebCore/platform/graphics/FontFamilySpecificationNull.cpp
>@@ -27,7 +27,7 @@
> #include "FontFamilySpecificationNull.h"
> 
> #include "FontSelector.h"
>-#include <wtf/text/AtomicStringHash.h>
>+#include <wtf/text/AtomStringHash.h>
> 
> namespace WebCore {
> 
>diff --git a/Source/WebCore/platform/graphics/FontGenericFamilies.cpp b/Source/WebCore/platform/graphics/FontGenericFamilies.cpp
>index d43c0bdbdaf84ea13390fbf6003e38239a2c24dc..172b721acf5e821c4301c2f282a9f8215fdbaac1 100644
>--- a/Source/WebCore/platform/graphics/FontGenericFamilies.cpp
>+++ b/Source/WebCore/platform/graphics/FontGenericFamilies.cpp
>@@ -30,11 +30,11 @@
> 
> namespace WebCore {
> 
>-static bool setGenericFontFamilyForScript(ScriptFontFamilyMap& fontMap, const AtomicString& family, UScriptCode script)
>+static bool setGenericFontFamilyForScript(ScriptFontFamilyMap& fontMap, const AtomString& family, UScriptCode script)
> {
> if (family.isEmpty())
> return fontMap.remove(static_cast<int>(script));
>- auto& familyInMap = fontMap.add(static_cast<int>(script), AtomicString { }).iterator->value;
>+ auto& familyInMap = fontMap.add(static_cast<int>(script), AtomString { }).iterator->value;
> if (familyInMap == family)
> return false;
> familyInMap = family;
>@@ -64,7 +64,7 @@ static void languageChanged(void*)
> cachedUserPrefersSimplified() = computeUserPrefersSimplified();
> }
> 
>-static const AtomicString& genericFontFamilyForScript(const ScriptFontFamilyMap& fontMap, UScriptCode script)
>+static const AtomString& genericFontFamilyForScript(const ScriptFontFamilyMap& fontMap, UScriptCode script)
> {
> ScriptFontFamilyMap::const_iterator it = fontMap.find(static_cast<int>(script));
> if (it != fontMap.end())
>@@ -87,72 +87,72 @@ FontGenericFamilies::FontGenericFamilies()
> languageChanged(nullptr);
> }
> 
>-const AtomicString& FontGenericFamilies::standardFontFamily(UScriptCode script) const
>+const AtomString& FontGenericFamilies::standardFontFamily(UScriptCode script) const
> {
> return genericFontFamilyForScript(m_standardFontFamilyMap, script);
> }
> 
>-const AtomicString& FontGenericFamilies::fixedFontFamily(UScriptCode script) const
>+const AtomString& FontGenericFamilies::fixedFontFamily(UScriptCode script) const
> {
> return genericFontFamilyForScript(m_fixedFontFamilyMap, script);
> }
> 
>-const AtomicString& FontGenericFamilies::serifFontFamily(UScriptCode script) const
>+const AtomString& FontGenericFamilies::serifFontFamily(UScriptCode script) const
> {
> return genericFontFamilyForScript(m_serifFontFamilyMap, script);
> }
> 
>-const AtomicString& FontGenericFamilies::sansSerifFontFamily(UScriptCode script) const
>+const AtomString& FontGenericFamilies::sansSerifFontFamily(UScriptCode script) const
> {
> return genericFontFamilyForScript(m_sansSerifFontFamilyMap, script);
> }
> 
>-const AtomicString& FontGenericFamilies::cursiveFontFamily(UScriptCode script) const
>+const AtomString& FontGenericFamilies::cursiveFontFamily(UScriptCode script) const
> {
> return genericFontFamilyForScript(m_cursiveFontFamilyMap, script);
> }
> 
>-const AtomicString& FontGenericFamilies::fantasyFontFamily(UScriptCode script) const
>+const AtomString& FontGenericFamilies::fantasyFontFamily(UScriptCode script) const
> {
> return genericFontFamilyForScript(m_fantasyFontFamilyMap, script);
> }
> 
>-const AtomicString& FontGenericFamilies::pictographFontFamily(UScriptCode script) const
>+const AtomString& FontGenericFamilies::pictographFontFamily(UScriptCode script) const
> {
> return genericFontFamilyForScript(m_pictographFontFamilyMap, script);
> }
> 
>-bool FontGenericFamilies::setStandardFontFamily(const AtomicString& family, UScriptCode script)
>+bool FontGenericFamilies::setStandardFontFamily(const AtomString& family, UScriptCode script)
> {
> return setGenericFontFamilyForScript(m_standardFontFamilyMap, family, script);
> }
> 
>-bool FontGenericFamilies::setFixedFontFamily(const AtomicString& family, UScriptCode script)
>+bool FontGenericFamilies::setFixedFontFamily(const AtomString& family, UScriptCode script)
> {
> return setGenericFontFamilyForScript(m_fixedFontFamilyMap, family, script);
> }
> 
>-bool FontGenericFamilies::setSerifFontFamily(const AtomicString& family, UScriptCode script)
>+bool FontGenericFamilies::setSerifFontFamily(const AtomString& family, UScriptCode script)
> {
> return setGenericFontFamilyForScript(m_serifFontFamilyMap, family, script);
> }
> 
>-bool FontGenericFamilies::setSansSerifFontFamily(const AtomicString& family, UScriptCode script)
>+bool FontGenericFamilies::setSansSerifFontFamily(const AtomString& family, UScriptCode script)
> {
> return setGenericFontFamilyForScript(m_sansSerifFontFamilyMap, family, script);
> }
> 
>-bool FontGenericFamilies::setCursiveFontFamily(const AtomicString& family, UScriptCode script)
>+bool FontGenericFamilies::setCursiveFontFamily(const AtomString& family, UScriptCode script)
> {
> return setGenericFontFamilyForScript(m_cursiveFontFamilyMap, family, script);
> }
> 
>-bool FontGenericFamilies::setFantasyFontFamily(const AtomicString& family, UScriptCode script)
>+bool FontGenericFamilies::setFantasyFontFamily(const AtomString& family, UScriptCode script)
> {
> return setGenericFontFamilyForScript(m_fantasyFontFamilyMap, family, script);
> }
> 
>-bool FontGenericFamilies::setPictographFontFamily(const AtomicString& family, UScriptCode script)
>+bool FontGenericFamilies::setPictographFontFamily(const AtomString& family, UScriptCode script)
> {
> return setGenericFontFamilyForScript(m_pictographFontFamilyMap, family, script);
> }
>diff --git a/Source/WebCore/platform/graphics/FontGenericFamilies.h b/Source/WebCore/platform/graphics/FontGenericFamilies.h
>index 42f42b2e5cd11204f8c6c154267e4b8ce24c5b7a..685868dda527fd8a0d06f1dcdea5bf4a1b0fdad2 100644
>--- a/Source/WebCore/platform/graphics/FontGenericFamilies.h
>+++ b/Source/WebCore/platform/graphics/FontGenericFamilies.h
>@@ -28,8 +28,8 @@
> 
> #include <unicode/uscript.h>
> #include <wtf/HashMap.h>
>-#include <wtf/text/AtomicString.h>
>-#include <wtf/text/AtomicStringHash.h>
>+#include <wtf/text/AtomString.h>
>+#include <wtf/text/AtomStringHash.h>
> 
> namespace WebCore {
> 
>@@ -42,28 +42,28 @@ struct UScriptCodeHashTraits : WTF::GenericHashTraits<int> {
> static bool isDeletedValue(int value) { return value == -3; }
> };
> 
>-typedef HashMap<int, AtomicString, DefaultHash<int>::Hash, UScriptCodeHashTraits> ScriptFontFamilyMap;
>+typedef HashMap<int, AtomString, DefaultHash<int>::Hash, UScriptCodeHashTraits> ScriptFontFamilyMap;
> 
> class FontGenericFamilies {
> WTF_MAKE_FAST_ALLOCATED;
> public:
> FontGenericFamilies();
> 
>- const AtomicString& standardFontFamily(UScriptCode = USCRIPT_COMMON) const;
>- const AtomicString& fixedFontFamily(UScriptCode = USCRIPT_COMMON) const;
>- const AtomicString& serifFontFamily(UScriptCode = USCRIPT_COMMON) const;
>- const AtomicString& sansSerifFontFamily(UScriptCode = USCRIPT_COMMON) const;
>- const AtomicString& cursiveFontFamily(UScriptCode = USCRIPT_COMMON) const;
>- const AtomicString& fantasyFontFamily(UScriptCode = USCRIPT_COMMON) const;
>- const AtomicString& pictographFontFamily(UScriptCode = USCRIPT_COMMON) const;
>+ const AtomString& standardFontFamily(UScriptCode = USCRIPT_COMMON) const;
>+ const AtomString& fixedFontFamily(UScriptCode = USCRIPT_COMMON) const;
>+ const AtomString& serifFontFamily(UScriptCode = USCRIPT_COMMON) const;
>+ const AtomString& sansSerifFontFamily(UScriptCode = USCRIPT_COMMON) const;
>+ const AtomString& cursiveFontFamily(UScriptCode = USCRIPT_COMMON) const;
>+ const AtomString& fantasyFontFamily(UScriptCode = USCRIPT_COMMON) const;
>+ const AtomString& pictographFontFamily(UScriptCode = USCRIPT_COMMON) const;
> 
>- bool setStandardFontFamily(const AtomicString&, UScriptCode);
>- bool setFixedFontFamily(const AtomicString&, UScriptCode);
>- bool setSerifFontFamily(const AtomicString&, UScriptCode);
>- bool setSansSerifFontFamily(const AtomicString&, UScriptCode);
>- bool setCursiveFontFamily(const AtomicString&, UScriptCode);
>- bool setFantasyFontFamily(const AtomicString&, UScriptCode);
>- bool setPictographFontFamily(const AtomicString&, UScriptCode);
>+ bool setStandardFontFamily(const AtomString&, UScriptCode);
>+ bool setFixedFontFamily(const AtomString&, UScriptCode);
>+ bool setSerifFontFamily(const AtomString&, UScriptCode);
>+ bool setSansSerifFontFamily(const AtomString&, UScriptCode);
>+ bool setCursiveFontFamily(const AtomString&, UScriptCode);
>+ bool setFantasyFontFamily(const AtomString&, UScriptCode);
>+ bool setPictographFontFamily(const AtomString&, UScriptCode);
> 
> private:
> ScriptFontFamilyMap m_standardFontFamilyMap;
>diff --git a/Source/WebCore/platform/graphics/FontPlatformData.h b/Source/WebCore/platform/graphics/FontPlatformData.h
>index 6cd022ceec64ef9309702bd4a38818db76346cea..1ca975e9f788d3b3049e300ef484d3b2b45c7be3 100644
>--- a/Source/WebCore/platform/graphics/FontPlatformData.h
>+++ b/Source/WebCore/platform/graphics/FontPlatformData.h
>@@ -80,7 +80,7 @@ public:
> FontPlatformData(WTF::HashTableDeletedValueType);
> FontPlatformData();
> 
>- FontPlatformData(const FontDescription&, const AtomicString& family);
>+ FontPlatformData(const FontDescription&, const AtomString& family);
> FontPlatformData(float size, bool syntheticBold, bool syntheticOblique, FontOrientation = FontOrientation::Horizontal, FontWidthVariant = FontWidthVariant::RegularWidth, TextRenderingMode = TextRenderingMode::AutoTextRendering);
> 
> #if PLATFORM(COCOA)
>diff --git a/Source/WebCore/platform/graphics/FontSelector.h b/Source/WebCore/platform/graphics/FontSelector.h
>index 04dd33ea4805abce37296bc273f68da5089735fa..ac9c1696d1437fc5481aa63980b61006d85c2f50 100644
>--- a/Source/WebCore/platform/graphics/FontSelector.h
>+++ b/Source/WebCore/platform/graphics/FontSelector.h
>@@ -47,12 +47,12 @@ class FontSelector : public RefCounted<FontSelector> {
> public:
> virtual ~FontSelector() = default;
> 
>- virtual FontRanges fontRangesForFamily(const FontDescription&, const AtomicString&) = 0;
>+ virtual FontRanges fontRangesForFamily(const FontDescription&, const AtomString&) = 0;
> virtual RefPtr fallbackFontAt(const FontDescription&, size_t) = 0;
> 
> virtual size_t fallbackFontCount() = 0;
> 
>- virtual void opportunisticallyStartFontDataURLLoading(const FontCascadeDescription&, const AtomicString& family) = 0;
>+ virtual void opportunisticallyStartFontDataURLLoading(const FontCascadeDescription&, const AtomString& family) = 0;
> 
> virtual void fontCacheInvalidated() { }
> 
>diff --git a/Source/WebCore/platform/graphics/FontTaggedSettings.cpp b/Source/WebCore/platform/graphics/FontTaggedSettings.cpp
>index d35eb16ba52ad03f07a4efed041bfbe884033610..4e608f1925a578adc06a819798ab557ccd31571c 100644
>--- a/Source/WebCore/platform/graphics/FontTaggedSettings.cpp
>+++ b/Source/WebCore/platform/graphics/FontTaggedSettings.cpp
>@@ -28,7 +28,7 @@
> #include "FontTaggedSettings.h"
> 
> #include <wtf/Hasher.h>
>-#include <wtf/text/AtomicStringHash.h>
>+#include <wtf/text/AtomStringHash.h>
> #include <wtf/text/TextStream.h>
> 
> namespace WebCore {
>diff --git a/Source/WebCore/platform/graphics/GraphicsContext.cpp b/Source/WebCore/platform/graphics/GraphicsContext.cpp
>index 1332c940fd102763df4d08dd26f8caa241cefad5..7d1db7d3db2be971962198d4f936e9a418ba81e4 100644
>--- a/Source/WebCore/platform/graphics/GraphicsContext.cpp
>+++ b/Source/WebCore/platform/graphics/GraphicsContext.cpp
>@@ -666,7 +666,7 @@ void GraphicsContext::drawGlyphs(const Font& font, const GlyphBuffer& buffer, un
> FontCascade::drawGlyphs(*this, font, buffer, from, numGlyphs, point, fontSmoothingMode);
> }
> 
>-void GraphicsContext::drawEmphasisMarks(const FontCascade& font, const TextRun& run, const AtomicString& mark, const FloatPoint& point, unsigned from, Optional<unsigned> to)
>+void GraphicsContext::drawEmphasisMarks(const FontCascade& font, const TextRun& run, const AtomString& mark, const FloatPoint& point, unsigned from, Optional<unsigned> to)
> {
> if (paintingDisabled())
> return;
>diff --git a/Source/WebCore/platform/graphics/GraphicsContext.h b/Source/WebCore/platform/graphics/GraphicsContext.h
>index 638b7671c9ecb53ab8efb5b8f3ed3a2c3f36e4c4..b8407ef9345f7b7d5e3865cc458f43d46e40d5b3 100644
>--- a/Source/WebCore/platform/graphics/GraphicsContext.h
>+++ b/Source/WebCore/platform/graphics/GraphicsContext.h
>@@ -423,7 +423,7 @@ public:
> 
> float drawText(const FontCascade&, const TextRun&, const FloatPoint&, unsigned from = 0, Optional<unsigned> to = WTF::nullopt);
> void drawGlyphs(const Font&, const GlyphBuffer&, unsigned from, unsigned numGlyphs, const FloatPoint&, FontSmoothingMode);
>- void drawEmphasisMarks(const FontCascade&, const TextRun&, const AtomicString& mark, const FloatPoint&, unsigned from = 0, Optional<unsigned> to = WTF::nullopt);
>+ void drawEmphasisMarks(const FontCascade&, const TextRun&, const AtomString& mark, const FloatPoint&, unsigned from = 0, Optional<unsigned> to = WTF::nullopt);
> void drawBidiText(const FontCascade&, const TextRun&, const FloatPoint&, FontCascade::CustomFontNotReadyAction = FontCascade::DoNotPaintIfFontNotReady);
> 
> void applyState(const GraphicsContextState&);
>diff --git a/Source/WebCore/platform/graphics/InbandTextTrackPrivate.h b/Source/WebCore/platform/graphics/InbandTextTrackPrivate.h
>index 13f187893b440ffb58d3beb1f63f4b4d213b5685..b33423583da6b5a4f7bcc59d0107f7966d6e6f03 100644
>--- a/Source/WebCore/platform/graphics/InbandTextTrackPrivate.h
>+++ b/Source/WebCore/platform/graphics/InbandTextTrackPrivate.h
>@@ -69,10 +69,10 @@ public:
> virtual bool isMainProgramContent() const { return true; }
> virtual bool isEasyToRead() const { return false; }
> virtual bool isDefault() const { return false; }
>- AtomicString label() const override { return emptyAtom(); }
>- AtomicString language() const override { return emptyAtom(); }
>- AtomicString id() const override { return emptyAtom(); }
>- virtual AtomicString inBandMetadataTrackDispatchType() const { return emptyAtom(); }
>+ AtomString label() const override { return emptyAtom(); }
>+ AtomString language() const override { return emptyAtom(); }
>+ AtomString id() const override { return emptyAtom(); }
>+ virtual AtomString inBandMetadataTrackDispatchType() const { return emptyAtom(); }
> 
> virtual int textTrackIndex() const { return 0; }
> 
>diff --git a/Source/WebCore/platform/graphics/MediaPlayer.cpp b/Source/WebCore/platform/graphics/MediaPlayer.cpp
>index 5a704b3222c5bc68ba4a61406c95d78cbb408334..01149c452e3774be5bd76ad0f9e31e4e6628fe5a 100644
>--- a/Source/WebCore/platform/graphics/MediaPlayer.cpp
>+++ b/Source/WebCore/platform/graphics/MediaPlayer.cpp
>@@ -287,15 +287,15 @@ static void addMediaEngine(CreateMediaEnginePlayer&& constructor, MediaEngineSup
> mutableInstalledMediaEnginesVector().append(MediaPlayerFactory { WTFMove(constructor), getSupportedTypes, supportsType, originsInMediaCache, clearMediaCache, clearMediaCacheForOrigins, supportsKeySystem });
> }
> 
>-static const AtomicString& applicationOctetStream()
>+static const AtomString& applicationOctetStream()
> {
>- static NeverDestroyed<const AtomicString> applicationOctetStream("application/octet-stream", AtomicString::ConstructFromLiteral);
>+ static NeverDestroyed<const AtomString> applicationOctetStream("application/octet-stream", AtomString::ConstructFromLiteral);
> return applicationOctetStream;
> }
> 
>-static const AtomicString& textPlain()
>+static const AtomString& textPlain()
> {
>- static NeverDestroyed<const AtomicString> textPlain("text/plain", AtomicString::ConstructFromLiteral);
>+ static NeverDestroyed<const AtomString> textPlain("text/plain", AtomString::ConstructFromLiteral);
> return textPlain;
> }
> 
>@@ -390,7 +390,7 @@ bool MediaPlayer::load(const URL& url, const ContentType& contentType, const Str
> #endif
> 
> // If the MIME type is missing or is not meaningful, try to figure it out from the URL.
>- AtomicString containerType = m_contentType.containerType();
>+ AtomString containerType = m_contentType.containerType();
> if (containerType.isEmpty() || containerType == applicationOctetStream() || containerType == textPlain()) {
> if (m_url.protocolIsData())
> m_contentType = ContentType(mimeTypeFromDataURL(m_url.string()));
>@@ -920,7 +920,7 @@ MediaPlayer::SupportsType MediaPlayer::supportsType(const MediaEngineSupportPara
> {
> // 4.8.10.3 MIME types - The canPlayType(type) method must return the empty string if type is a type that the 
> // user agent knows it cannot render or is the type "application/octet-stream"
>- AtomicString containerType = parameters.type.containerType();
>+ AtomString containerType = parameters.type.containerType();
> if (containerType == applicationOctetStream())
> return IsNotSupported;
> 
>@@ -1498,7 +1498,7 @@ void MediaPlayerFactorySupport::callRegisterMediaEngine(MediaEngineRegister regi
> registerMediaEngine(addMediaEngine);
> }
> 
>-bool MediaPlayer::doesHaveAttribute(const AtomicString& attribute, AtomicString* value) const
>+bool MediaPlayer::doesHaveAttribute(const AtomString& attribute, AtomString* value) const
> {
> return client().doesHaveAttribute(attribute, value);
> }
>diff --git a/Source/WebCore/platform/graphics/MediaPlayer.h b/Source/WebCore/platform/graphics/MediaPlayer.h
>index 3e1263bbb63a387fe2c2fb4e16d0d07f7fce6de6..7fe84d793706cd408c0e5aa71c3d458f06e4edf7 100644
>--- a/Source/WebCore/platform/graphics/MediaPlayer.h
>+++ b/Source/WebCore/platform/graphics/MediaPlayer.h
>@@ -194,7 +194,7 @@ public:
> virtual bool mediaPlayerIsLooping() const { return false; }
> virtual CachedResourceLoader* mediaPlayerCachedResourceLoader() { return nullptr; }
> virtual RefPtr<PlatformMediaResourceLoader> mediaPlayerCreateResourceLoader() { return nullptr; }
>- virtual bool doesHaveAttribute(const AtomicString&, AtomicString* = nullptr) const { return false; }
>+ virtual bool doesHaveAttribute(const AtomString&, AtomString* = nullptr) const { return false; }
> virtual bool mediaPlayerShouldUsePersistentCache() const { return true; }
> virtual const String& mediaPlayerMediaCacheDirectory() const { return emptyString(); }
> 
>@@ -267,7 +267,7 @@ public:
> bool supportsScanning() const;
> bool canSaveMediaData() const;
> bool requiresImmediateCompositing() const;
>- bool doesHaveAttribute(const AtomicString&, AtomicString* value = nullptr) const;
>+ bool doesHaveAttribute(const AtomString&, AtomString* value = nullptr) const;
> PlatformLayer* platformLayer() const;
> 
> #if PLATFORM(IOS_FAMILY) || (PLATFORM(MAC) && ENABLE(VIDEO_PRESENTATION_MODE))
>diff --git a/Source/WebCore/platform/graphics/SourceBufferPrivate.h b/Source/WebCore/platform/graphics/SourceBufferPrivate.h
>index 594770337da60490d773b295d245602de3f78934..46e302d318e6b5ad6779397a2e8ff1583a0d131c 100644
>--- a/Source/WebCore/platform/graphics/SourceBufferPrivate.h
>+++ b/Source/WebCore/platform/graphics/SourceBufferPrivate.h
>@@ -55,14 +55,14 @@ public:
> virtual MediaPlayer::ReadyState readyState() const = 0;
> virtual void setReadyState(MediaPlayer::ReadyState) = 0;
> 
>- virtual void flush(const AtomicString&) { }
>- virtual void enqueueSample(Ref<MediaSample>&&, const AtomicString&) { }
>- virtual void allSamplesInTrackEnqueued(const AtomicString&) { }
>- virtual bool isReadyForMoreSamples(const AtomicString&) { return false; }
>+ virtual void flush(const AtomString&) { }
>+ virtual void enqueueSample(Ref<MediaSample>&&, const AtomString&) { }
>+ virtual void allSamplesInTrackEnqueued(const AtomString&) { }
>+ virtual bool isReadyForMoreSamples(const AtomString&) { return false; }
> virtual void setActive(bool) { }
>- virtual void notifyClientWhenReadyForMoreSamples(const AtomicString&) { }
>+ virtual void notifyClientWhenReadyForMoreSamples(const AtomString&) { }
> 
>- virtual Vector<String> enqueuedSamplesForTrackID(const AtomicString&) { return { }; }
>+ virtual Vector<String> enqueuedSamplesForTrackID(const AtomString&) { return { }; }
> 
> virtual bool canSwitchToType(const ContentType&) { return false; }
> 
>diff --git a/Source/WebCore/platform/graphics/SourceBufferPrivateClient.h b/Source/WebCore/platform/graphics/SourceBufferPrivateClient.h
>index 0b6adbeeca414160804d21b9d7a29c2aa83a0878..00565a91fea98a6418a44620cbc366e9e8f10ad5 100644
>--- a/Source/WebCore/platform/graphics/SourceBufferPrivateClient.h
>+++ b/Source/WebCore/platform/graphics/SourceBufferPrivateClient.h
>@@ -68,8 +68,8 @@ public:
> virtual bool sourceBufferPrivateHasAudio() const = 0;
> virtual bool sourceBufferPrivateHasVideo() const = 0;
> 
>- virtual void sourceBufferPrivateReenqueSamples(const AtomicString& trackID) = 0;
>- virtual void sourceBufferPrivateDidBecomeReadyForMoreSamples(const AtomicString& trackID) = 0;
>+ virtual void sourceBufferPrivateReenqueSamples(const AtomString& trackID) = 0;
>+ virtual void sourceBufferPrivateDidBecomeReadyForMoreSamples(const AtomString& trackID) = 0;
> 
> virtual MediaTime sourceBufferPrivateFastSeekTimeForMediaTime(const MediaTime&, const MediaTime&, const MediaTime&) = 0;
> 
>diff --git a/Source/WebCore/platform/graphics/TrackPrivateBase.h b/Source/WebCore/platform/graphics/TrackPrivateBase.h
>index 4766622bbea8c41398e9b77156ba5cc6d4f6a4f1..ed7993d8ada465adf38628485c47713f14c62bfd 100644
>--- a/Source/WebCore/platform/graphics/TrackPrivateBase.h
>+++ b/Source/WebCore/platform/graphics/TrackPrivateBase.h
>@@ -32,16 +32,16 @@
> #include <wtf/LoggerHelper.h>
> #include <wtf/MediaTime.h>
> #include <wtf/ThreadSafeRefCounted.h>
>-#include <wtf/text/AtomicString.h>
>+#include <wtf/text/AtomString.h>
> 
> namespace WebCore {
> 
> class TrackPrivateBaseClient {
> public:
> virtual ~TrackPrivateBaseClient() = default;
>- virtual void idChanged(const AtomicString&) = 0;
>- virtual void labelChanged(const AtomicString&) = 0;
>- virtual void languageChanged(const AtomicString&) = 0;
>+ virtual void idChanged(const AtomString&) = 0;
>+ virtual void labelChanged(const AtomString&) = 0;
>+ virtual void languageChanged(const AtomString&) = 0;
> virtual void willRemove() = 0;
> };
> 
>@@ -58,9 +58,9 @@ public:
> 
> virtual TrackPrivateBaseClient* client() const = 0;
> 
>- virtual AtomicString id() const { return emptyAtom(); }
>- virtual AtomicString label() const { return emptyAtom(); }
>- virtual AtomicString language() const { return emptyAtom(); }
>+ virtual AtomString id() const { return emptyAtom(); }
>+ virtual AtomString label() const { return emptyAtom(); }
>+ virtual AtomString language() const { return emptyAtom(); }
> 
> virtual int trackIndex() const { return 0; }
> 
>diff --git a/Source/WebCore/platform/graphics/avfoundation/AVTrackPrivateAVFObjCImpl.h b/Source/WebCore/platform/graphics/avfoundation/AVTrackPrivateAVFObjCImpl.h
>index 3810c5fa6269f69900fc3ccf4446cf603776dd1d..a9ecd32136da87702f478afcd8acc8eb97c23940 100644
>--- a/Source/WebCore/platform/graphics/avfoundation/AVTrackPrivateAVFObjCImpl.h
>+++ b/Source/WebCore/platform/graphics/avfoundation/AVTrackPrivateAVFObjCImpl.h
>@@ -61,9 +61,9 @@ public:
> VideoTrackPrivate::Kind videoKind() const;
> 
> int index() const;
>- AtomicString id() const;
>- AtomicString label() const;
>- AtomicString language() const;
>+ AtomString id() const;
>+ AtomString label() const;
>+ AtomString language() const;
> 
> int trackID() const;
> 
>diff --git a/Source/WebCore/platform/graphics/avfoundation/AVTrackPrivateAVFObjCImpl.mm b/Source/WebCore/platform/graphics/avfoundation/AVTrackPrivateAVFObjCImpl.mm
>index 01502cdb0beabe3880bf33d5432f2f6526f36c7f..c5e3280bb1157cf3d33d7e068d11ed4c00e55be6 100644
>--- a/Source/WebCore/platform/graphics/avfoundation/AVTrackPrivateAVFObjCImpl.mm
>+++ b/Source/WebCore/platform/graphics/avfoundation/AVTrackPrivateAVFObjCImpl.mm
>@@ -153,17 +153,17 @@ int AVTrackPrivateAVFObjCImpl::index() const
> return 0;
> }
> 
>-AtomicString AVTrackPrivateAVFObjCImpl::id() const
>+AtomString AVTrackPrivateAVFObjCImpl::id() const
> {
> if (m_assetTrack)
>- return AtomicString::number([m_assetTrack trackID]);
>+ return AtomString::number([m_assetTrack trackID]);
> if (m_mediaSelectionOption)
> return [[m_mediaSelectionOption->avMediaSelectionOption() optionID] stringValue];
> ASSERT_NOT_REACHED();
> return emptyAtom();
> }
> 
>-AtomicString AVTrackPrivateAVFObjCImpl::label() const
>+AtomString AVTrackPrivateAVFObjCImpl::label() const
> {
> NSArray *commonMetadata = nil;
> if (m_assetTrack)
>@@ -184,7 +184,7 @@ AtomicString AVTrackPrivateAVFObjCImpl::label() const
> return [[titles objectAtIndex:0] stringValue];
> }
> 
>-AtomicString AVTrackPrivateAVFObjCImpl::language() const
>+AtomString AVTrackPrivateAVFObjCImpl::language() const
> {
> if (m_assetTrack)
> return languageForAVAssetTrack(m_assetTrack.get());
>diff --git a/Source/WebCore/platform/graphics/avfoundation/AudioTrackPrivateAVF.h b/Source/WebCore/platform/graphics/avfoundation/AudioTrackPrivateAVF.h
>index 19b560bccba58195ce45ef6ef81c8dcdec295bc4..8c1509eb2fe34464009223f36a24dc56e032c7f6 100644
>--- a/Source/WebCore/platform/graphics/avfoundation/AudioTrackPrivateAVF.h
>+++ b/Source/WebCore/platform/graphics/avfoundation/AudioTrackPrivateAVF.h
>@@ -35,22 +35,22 @@ class AudioTrackPrivateAVF : public AudioTrackPrivate {
> WTF_MAKE_NONCOPYABLE(AudioTrackPrivateAVF)
> public:
> virtual Kind kind() const { return m_kind; }
>- virtual AtomicString id() const { return m_id; }
>- virtual AtomicString label() const { return m_label; }
>- virtual AtomicString language() const { return m_language; }
>+ virtual AtomString id() const { return m_id; }
>+ virtual AtomString label() const { return m_label; }
>+ virtual AtomString language() const { return m_language; }
> virtual int trackIndex() const { return m_index; }
> 
> protected:
> void setKind(Kind kind) { m_kind = kind; }
>- void setId(const AtomicString& newId) { m_id = newId; }
>- void setLabel(const AtomicString& label) { m_label = label; }
>- void setLanguage(const AtomicString& language) { m_language = language; }
>+ void setId(const AtomString& newId) { m_id = newId; }
>+ void setLabel(const AtomString& label) { m_label = label; }
>+ void setLanguage(const AtomString& language) { m_language = language; }
> void setTrackIndex(int index) { m_index = index; }
> 
> Kind m_kind { None };
>- AtomicString m_id;
>- AtomicString m_label;
>- AtomicString m_language;
>+ AtomString m_id;
>+ AtomString m_label;
>+ AtomString m_language;
> int m_index { 0 };
> 
> AudioTrackPrivateAVF() = default;
>diff --git a/Source/WebCore/platform/graphics/avfoundation/CDMFairPlayStreaming.cpp b/Source/WebCore/platform/graphics/avfoundation/CDMFairPlayStreaming.cpp
>index 1b8535480e4228b6155a155eff826145e1c2320c..21b93de8881b5de767fa04c66b120a093683719f 100644
>--- a/Source/WebCore/platform/graphics/avfoundation/CDMFairPlayStreaming.cpp
>+++ b/Source/WebCore/platform/graphics/avfoundation/CDMFairPlayStreaming.cpp
>@@ -62,15 +62,15 @@ const Vector<FourCC>& CDMPrivateFairPlayStreaming::validFairPlayStreamingSchemes
> return validSchemes;
> }
> 
>-const AtomicString& CDMPrivateFairPlayStreaming::sinfName()
>+const AtomString& CDMPrivateFairPlayStreaming::sinfName()
> {
>- static NeverDestroyed<AtomicString> sinf { MAKE_STATIC_STRING_IMPL("sinf") };
>+ static NeverDestroyed<AtomString> sinf { MAKE_STATIC_STRING_IMPL("sinf") };
> return sinf;
> }
> 
>-const AtomicString& CDMPrivateFairPlayStreaming::skdName()
>+const AtomString& CDMPrivateFairPlayStreaming::skdName()
> {
>- static NeverDestroyed<AtomicString> skd { MAKE_STATIC_STRING_IMPL("skd") };
>+ static NeverDestroyed<AtomString> skd { MAKE_STATIC_STRING_IMPL("skd") };
> return skd;
> }
> 
>@@ -200,9 +200,9 @@ Optional<Vector<Ref<SharedBuffer>>> CDMPrivateFairPlayStreaming::extractKeyIDsSk
> return keyIDs;
> }
> 
>-static const HashSet<AtomicString>& validInitDataTypes()
>+static const HashSet<AtomString>& validInitDataTypes()
> {
>- static NeverDestroyed<HashSet<AtomicString>> validTypes = HashSet<AtomicString>({
>+ static NeverDestroyed<HashSet<AtomString>> validTypes = HashSet<AtomString>({
> CDMPrivateFairPlayStreaming::sinfName(),
> CDMPrivateFairPlayStreaming::skdName(),
> });
>@@ -245,7 +245,7 @@ bool CDMFactoryFairPlayStreaming::supportsKeySystem(const String& keySystem)
> CDMPrivateFairPlayStreaming::CDMPrivateFairPlayStreaming() = default;
> CDMPrivateFairPlayStreaming::~CDMPrivateFairPlayStreaming() = default;
> 
>-bool CDMPrivateFairPlayStreaming::supportsInitDataType(const AtomicString& initDataType) const
>+bool CDMPrivateFairPlayStreaming::supportsInitDataType(const AtomString& initDataType) const
> {
> return validInitDataTypes().contains(initDataType);
> }
>@@ -362,7 +362,7 @@ bool CDMPrivateFairPlayStreaming::supportsSessions() const
> return true;
> }
> 
>-bool CDMPrivateFairPlayStreaming::supportsInitData(const AtomicString& initDataType, const SharedBuffer& initData) const
>+bool CDMPrivateFairPlayStreaming::supportsInitData(const AtomString& initDataType, const SharedBuffer& initData) const
> {
> if (!supportsInitDataType(initDataType))
> return false;
>diff --git a/Source/WebCore/platform/graphics/avfoundation/CDMFairPlayStreaming.h b/Source/WebCore/platform/graphics/avfoundation/CDMFairPlayStreaming.h
>index 9167b6e18b4622fb8a52a04f25e84cba5e6aa715..4c8a6ce0aced56902a7d1d5c08d42711c28a4d75 100644
>--- a/Source/WebCore/platform/graphics/avfoundation/CDMFairPlayStreaming.h
>+++ b/Source/WebCore/platform/graphics/avfoundation/CDMFairPlayStreaming.h
>@@ -53,7 +53,7 @@ public:
> CDMPrivateFairPlayStreaming();
> virtual ~CDMPrivateFairPlayStreaming();
> 
>- bool supportsInitDataType(const AtomicString&) const override;
>+ bool supportsInitDataType(const AtomString&) const override;
> bool supportsConfiguration(const CDMKeySystemConfiguration&) const override;
> bool supportsConfigurationWithRestrictions(const CDMKeySystemConfiguration&, const CDMRestrictions&) const override;
> bool supportsSessionTypeWithConfiguration(CDMSessionType&, const CDMKeySystemConfiguration&) const override;
>@@ -65,15 +65,15 @@ public:
> void loadAndInitialize() override;
> bool supportsServerCertificates() const override;
> bool supportsSessions() const override;
>- bool supportsInitData(const AtomicString&, const SharedBuffer&) const override;
>+ bool supportsInitData(const AtomString&, const SharedBuffer&) const override;
> RefPtr<SharedBuffer> sanitizeResponse(const SharedBuffer&) const override;
> Optional<String> sanitizeSessionId(const String&) const override;
> 
>- static const AtomicString& sinfName();
>+ static const AtomString& sinfName();
> static Optional<Vector<Ref<SharedBuffer>>> extractKeyIDsSinf(const SharedBuffer&);
> static RefPtr<SharedBuffer> sanitizeSinf(const SharedBuffer&);
> 
>- static const AtomicString& skdName();
>+ static const AtomString& skdName();
> static Optional<Vector<Ref<SharedBuffer>>> extractKeyIDsSkd(const SharedBuffer&);
> static RefPtr<SharedBuffer> sanitizeSkd(const SharedBuffer&);
> 
>diff --git a/Source/WebCore/platform/graphics/avfoundation/InbandMetadataTextTrackPrivateAVF.cpp b/Source/WebCore/platform/graphics/avfoundation/InbandMetadataTextTrackPrivateAVF.cpp
>index ac3422e7c80330b75ec3f9fd8c3105664eb60628..0263c64fdf057362128a8690950850fbf16ffe68 100644
>--- a/Source/WebCore/platform/graphics/avfoundation/InbandMetadataTextTrackPrivateAVF.cpp
>+++ b/Source/WebCore/platform/graphics/avfoundation/InbandMetadataTextTrackPrivateAVF.cpp
>@@ -38,12 +38,12 @@
> 
> namespace WebCore {
> 
>-Ref<InbandMetadataTextTrackPrivateAVF> InbandMetadataTextTrackPrivateAVF::create(InbandTextTrackPrivate::Kind kind, InbandTextTrackPrivate::CueFormat cueFormat, const AtomicString& id)
>+Ref<InbandMetadataTextTrackPrivateAVF> InbandMetadataTextTrackPrivateAVF::create(InbandTextTrackPrivate::Kind kind, InbandTextTrackPrivate::CueFormat cueFormat, const AtomString& id)
> {
> return adoptRef(*new InbandMetadataTextTrackPrivateAVF(kind, cueFormat, id));
> }
> 
>-InbandMetadataTextTrackPrivateAVF::InbandMetadataTextTrackPrivateAVF(InbandTextTrackPrivate::Kind kind, InbandTextTrackPrivate::CueFormat cueFormat, const AtomicString& id)
>+InbandMetadataTextTrackPrivateAVF::InbandMetadataTextTrackPrivateAVF(InbandTextTrackPrivate::Kind kind, InbandTextTrackPrivate::CueFormat cueFormat, const AtomString& id)
> : InbandTextTrackPrivate(cueFormat)
> , m_kind(kind)
> , m_id(id)
>diff --git a/Source/WebCore/platform/graphics/avfoundation/InbandMetadataTextTrackPrivateAVF.h b/Source/WebCore/platform/graphics/avfoundation/InbandMetadataTextTrackPrivateAVF.h
>index 17c8b50452bffab811fd47aad6720543de768417..2ec7d5c0530d778b94907316caf7abd1ecb387af 100644
>--- a/Source/WebCore/platform/graphics/avfoundation/InbandMetadataTextTrackPrivateAVF.h
>+++ b/Source/WebCore/platform/graphics/avfoundation/InbandMetadataTextTrackPrivateAVF.h
>@@ -41,14 +41,14 @@ struct IncompleteMetaDataCue {
> 
> class InbandMetadataTextTrackPrivateAVF : public InbandTextTrackPrivate {
> public:
>- static Ref<InbandMetadataTextTrackPrivateAVF> create(Kind, CueFormat, const AtomicString& id = emptyAtom());
>+ static Ref<InbandMetadataTextTrackPrivateAVF> create(Kind, CueFormat, const AtomString& id = emptyAtom());
> 
> ~InbandMetadataTextTrackPrivateAVF();
> 
> Kind kind() const override { return m_kind; }
>- AtomicString id() const override { return m_id; }
>- AtomicString inBandMetadataTrackDispatchType() const override { return m_inBandMetadataTrackDispatchType; }
>- void setInBandMetadataTrackDispatchType(const AtomicString& value) { m_inBandMetadataTrackDispatchType = value; }
>+ AtomString id() const override { return m_id; }
>+ AtomString inBandMetadataTrackDispatchType() const override { return m_inBandMetadataTrackDispatchType; }
>+ void setInBandMetadataTrackDispatchType(const AtomString& value) { m_inBandMetadataTrackDispatchType = value; }
> 
> #if ENABLE(DATACUE_VALUE)
> void addDataCue(const MediaTime& start, const MediaTime& end, Ref<SerializedPlatformRepresentation>&&, const String&);
>@@ -58,15 +58,15 @@ public:
> void flushPartialCues();
> 
> private:
>- InbandMetadataTextTrackPrivateAVF(Kind, CueFormat, const AtomicString&);
>+ InbandMetadataTextTrackPrivateAVF(Kind, CueFormat, const AtomString&);
> 
> #if !RELEASE_LOG_DISABLED
> const char* logClassName() const final { return "InbandMetadataTextTrackPrivateAVF"; }
> #endif
> 
> Kind m_kind;
>- AtomicString m_id;
>- AtomicString m_inBandMetadataTrackDispatchType;
>+ AtomString m_id;
>+ AtomString m_inBandMetadataTrackDispatchType;
> MediaTime m_currentCueStartTime;
> #if ENABLE(DATACUE_VALUE)
> Vector<IncompleteMetaDataCue> m_incompleteCues;
>diff --git a/Source/WebCore/platform/graphics/avfoundation/VideoTrackPrivateAVF.h b/Source/WebCore/platform/graphics/avfoundation/VideoTrackPrivateAVF.h
>index a3f0f4eca0573dd82fb947f4b9f9f071a0f3c2fd..cbedb5347cb794c93f8455894d0d57906130cd28 100644
>--- a/Source/WebCore/platform/graphics/avfoundation/VideoTrackPrivateAVF.h
>+++ b/Source/WebCore/platform/graphics/avfoundation/VideoTrackPrivateAVF.h
>@@ -36,21 +36,21 @@ class VideoTrackPrivateAVF : public VideoTrackPrivate {
> public:
> int trackIndex() const override { return m_index; }
> Kind kind() const override { return m_kind; }
>- AtomicString id() const override { return m_id; }
>- AtomicString label() const override { return m_label; }
>- AtomicString language() const override { return m_language; }
>+ AtomString id() const override { return m_id; }
>+ AtomString label() const override { return m_label; }
>+ AtomString language() const override { return m_language; }
> 
> protected:
> void setKind(Kind kind) { m_kind = kind; }
>- void setId(const AtomicString& newId) { m_id = newId; }
>- void setLabel(const AtomicString& label) { m_label = label; }
>- void setLanguage(const AtomicString& language) { m_language = language; }
>+ void setId(const AtomString& newId) { m_id = newId; }
>+ void setLabel(const AtomString& label) { m_label = label; }
>+ void setLanguage(const AtomString& language) { m_language = language; }
> void setTrackIndex(int index) { m_index = index; }
> 
> Kind m_kind { None };
>- AtomicString m_id;
>- AtomicString m_label;
>- AtomicString m_language;
>+ AtomString m_id;
>+ AtomString m_label;
>+ AtomString m_language;
> int m_index { 0 };
> 
> VideoTrackPrivateAVF() = default;
>diff --git a/Source/WebCore/platform/graphics/avfoundation/cf/InbandTextTrackPrivateAVCF.cpp b/Source/WebCore/platform/graphics/avfoundation/cf/InbandTextTrackPrivateAVCF.cpp
>index 9fb9656aea304c11e8aa921875bfb363405c9fc0..8b5ec16d58da606eca76bb699c62956ffa069cd6 100644
>--- a/Source/WebCore/platform/graphics/avfoundation/cf/InbandTextTrackPrivateAVCF.cpp
>+++ b/Source/WebCore/platform/graphics/avfoundation/cf/InbandTextTrackPrivateAVCF.cpp
>@@ -137,7 +137,7 @@ bool InbandTextTrackPrivateAVCF::isEasyToRead() const
> return AVCFMediaSelectionOptionHasMediaCharacteristic(mediaSelectionOption(), AVCFMediaCharacteristicEasyToRead);
> }
> 
>-AtomicString InbandTextTrackPrivateAVCF::label() const
>+AtomString InbandTextTrackPrivateAVCF::label() const
> {
> if (!m_mediaSelectionOption)
> return emptyAtom();
>@@ -167,10 +167,10 @@ AtomicString InbandTextTrackPrivateAVCF::label() const
> title = adoptCF(AVCFMetadataItemCopyStringValue(titleMetadata));
> }
> 
>- return title ? AtomicString(title.get()) : emptyAtom();
>+ return title ? AtomString(title.get()) : emptyAtom();
> }
> 
>-AtomicString InbandTextTrackPrivateAVCF::language() const
>+AtomString InbandTextTrackPrivateAVCF::language() const
> {
> if (!m_mediaSelectionOption)
> return emptyAtom();
>diff --git a/Source/WebCore/platform/graphics/avfoundation/cf/InbandTextTrackPrivateAVCF.h b/Source/WebCore/platform/graphics/avfoundation/cf/InbandTextTrackPrivateAVCF.h
>index 4b80735aa251cee1313d9ff2ec0214326dca11ae..9aade617e3de975c13007e5167986afba9ed20db 100644
>--- a/Source/WebCore/platform/graphics/avfoundation/cf/InbandTextTrackPrivateAVCF.h
>+++ b/Source/WebCore/platform/graphics/avfoundation/cf/InbandTextTrackPrivateAVCF.h
>@@ -49,8 +49,8 @@ public:
> bool containsOnlyForcedSubtitles() const override;
> bool isMainProgramContent() const override;
> bool isEasyToRead() const override;
>- AtomicString label() const override;
>- AtomicString language() const override;
>+ AtomString label() const override;
>+ AtomString language() const override;
> bool isDefault() const override;
> 
> void disconnect() override;
>diff --git a/Source/WebCore/platform/graphics/avfoundation/cf/InbandTextTrackPrivateLegacyAVCF.cpp b/Source/WebCore/platform/graphics/avfoundation/cf/InbandTextTrackPrivateLegacyAVCF.cpp
>index 16993dbcf925fa2bc005f2f13ca31696d582b9f6..19701c022cd34e056be42b35b31018aa3bb827bc 100644
>--- a/Source/WebCore/platform/graphics/avfoundation/cf/InbandTextTrackPrivateLegacyAVCF.cpp
>+++ b/Source/WebCore/platform/graphics/avfoundation/cf/InbandTextTrackPrivateLegacyAVCF.cpp
>@@ -83,7 +83,7 @@ bool InbandTextTrackPrivateLegacyAVCF::isEasyToRead() const
> return false;
> }
> 
>-AtomicString InbandTextTrackPrivateLegacyAVCF::label() const
>+AtomString InbandTextTrackPrivateLegacyAVCF::label() const
> {
> if (!m_playerItemTrack)
> return emptyAtom();
>@@ -109,10 +109,10 @@ AtomicString InbandTextTrackPrivateLegacyAVCF::label() const
> }
> }
> 
>- return title ? AtomicString(title.get()) : emptyAtom();
>+ return title ? AtomString(title.get()) : emptyAtom();
> }
> 
>-AtomicString InbandTextTrackPrivateLegacyAVCF::language() const
>+AtomString InbandTextTrackPrivateLegacyAVCF::language() const
> {
> if (!m_playerItemTrack)
> return emptyAtom();
>diff --git a/Source/WebCore/platform/graphics/avfoundation/cf/InbandTextTrackPrivateLegacyAVCF.h b/Source/WebCore/platform/graphics/avfoundation/cf/InbandTextTrackPrivateLegacyAVCF.h
>index 65d45506931af54b953bdecf16c96cd92762426f..1708e997355061db16ff1f59a216fccda7e19149 100644
>--- a/Source/WebCore/platform/graphics/avfoundation/cf/InbandTextTrackPrivateLegacyAVCF.h
>+++ b/Source/WebCore/platform/graphics/avfoundation/cf/InbandTextTrackPrivateLegacyAVCF.h
>@@ -50,8 +50,8 @@ public:
> bool containsOnlyForcedSubtitles() const override;
> bool isMainProgramContent() const override;
> bool isEasyToRead() const override;
>- AtomicString label() const override;
>- AtomicString language() const override;
>+ AtomString label() const override;
>+ AtomString language() const override;
> 
> void disconnect() override;
> 
>diff --git a/Source/WebCore/platform/graphics/avfoundation/objc/CDMInstanceFairPlayStreamingAVFObjC.h b/Source/WebCore/platform/graphics/avfoundation/objc/CDMInstanceFairPlayStreamingAVFObjC.h
>index 61ffc5205bd2ad42ebc86c327f5594bb6c7d1174..66f4e2fd78a0d3039af8b07b6a5a2ba9c4f08f48 100644
>--- a/Source/WebCore/platform/graphics/avfoundation/objc/CDMInstanceFairPlayStreamingAVFObjC.h
>+++ b/Source/WebCore/platform/graphics/avfoundation/objc/CDMInstanceFairPlayStreamingAVFObjC.h
>@@ -86,7 +86,7 @@ public:
> virtual ~CDMInstanceSessionFairPlayStreamingAVFObjC();
> 
> // CDMInstanceSession
>- void requestLicense(LicenseType, const AtomicString& initDataType, Ref<SharedBuffer>&& initData, LicenseCallback&&) final;
>+ void requestLicense(LicenseType, const AtomString& initDataType, Ref<SharedBuffer>&& initData, LicenseCallback&&) final;
> void updateLicense(const String&, LicenseType, const SharedBuffer&, LicenseUpdateCallback&&) final;
> void loadSession(LicenseType, const String&, const String&, LoadSessionCallback&&) final;
> void closeSession(const String&, CloseSessionCallback&&) final;
>diff --git a/Source/WebCore/platform/graphics/avfoundation/objc/CDMInstanceFairPlayStreamingAVFObjC.mm b/Source/WebCore/platform/graphics/avfoundation/objc/CDMInstanceFairPlayStreamingAVFObjC.mm
>index 43ef2cd70004902653e431dd2b08ac342abe7ebd..bd8a6153de3a919b702a3275da16ed37071dce56 100644
>--- a/Source/WebCore/platform/graphics/avfoundation/objc/CDMInstanceFairPlayStreamingAVFObjC.mm
>+++ b/Source/WebCore/platform/graphics/avfoundation/objc/CDMInstanceFairPlayStreamingAVFObjC.mm
>@@ -294,7 +294,7 @@ Vector<Ref<SharedBuffer>> CDMInstanceSessionFairPlayStreamingAVFObjC::keyIDs()
> return keyIDs;
> }
> 
>-void CDMInstanceSessionFairPlayStreamingAVFObjC::requestLicense(LicenseType licenseType, const AtomicString& initDataType, Ref<SharedBuffer>&& initData, LicenseCallback&& callback)
>+void CDMInstanceSessionFairPlayStreamingAVFObjC::requestLicense(LicenseType licenseType, const AtomString& initDataType, Ref<SharedBuffer>&& initData, LicenseCallback&& callback)
> {
> if (!isLicenseTypeSupported(licenseType)) {
> callback(SharedBuffer::create(), emptyString(), false, Failed);
>diff --git a/Source/WebCore/platform/graphics/avfoundation/objc/InbandTextTrackPrivateAVFObjC.h b/Source/WebCore/platform/graphics/avfoundation/objc/InbandTextTrackPrivateAVFObjC.h
>index d3535e47de0e2615cc26ebbdf42797cd21ca23cc..3fd0ff93ba3a69f726b915208df43e02ef5c9ed2 100644
>--- a/Source/WebCore/platform/graphics/avfoundation/objc/InbandTextTrackPrivateAVFObjC.h
>+++ b/Source/WebCore/platform/graphics/avfoundation/objc/InbandTextTrackPrivateAVFObjC.h
>@@ -51,8 +51,8 @@ public:
> bool containsOnlyForcedSubtitles() const override;
> bool isMainProgramContent() const override;
> bool isEasyToRead() const override;
>- AtomicString label() const override;
>- AtomicString language() const override;
>+ AtomString label() const override;
>+ AtomString language() const override;
> bool isDefault() const override;
> 
> void disconnect() override;
>diff --git a/Source/WebCore/platform/graphics/avfoundation/objc/InbandTextTrackPrivateAVFObjC.mm b/Source/WebCore/platform/graphics/avfoundation/objc/InbandTextTrackPrivateAVFObjC.mm
>index 3067273ed62e5a1fa6fec4adbd228258f5c0b540..3a8325b47d8f7e21244193a9f4f0f4b30fe7a017 100644
>--- a/Source/WebCore/platform/graphics/avfoundation/objc/InbandTextTrackPrivateAVFObjC.mm
>+++ b/Source/WebCore/platform/graphics/avfoundation/objc/InbandTextTrackPrivateAVFObjC.mm
>@@ -129,7 +129,7 @@ bool InbandTextTrackPrivateAVFObjC::isEasyToRead() const
> return [m_mediaSelectionOption hasMediaCharacteristic:AVMediaCharacteristicEasyToRead];
> }
> 
>-AtomicString InbandTextTrackPrivateAVFObjC::label() const
>+AtomString InbandTextTrackPrivateAVFObjC::label() const
> {
> if (!m_mediaSelectionOption)
> return emptyAtom();
>@@ -147,10 +147,10 @@ AtomicString InbandTextTrackPrivateAVFObjC::label() const
> title = [[titles objectAtIndex:0] stringValue];
> }
> 
>- return title ? AtomicString(title) : emptyAtom();
>+ return title ? AtomString(title) : emptyAtom();
> }
> 
>-AtomicString InbandTextTrackPrivateAVFObjC::language() const
>+AtomString InbandTextTrackPrivateAVFObjC::language() const
> {
> if (!m_mediaSelectionOption)
> return emptyAtom();
>diff --git a/Source/WebCore/platform/graphics/avfoundation/objc/InbandTextTrackPrivateLegacyAVFObjC.h b/Source/WebCore/platform/graphics/avfoundation/objc/InbandTextTrackPrivateLegacyAVFObjC.h
>index 6334883da9ab9c5054ad208e042cfe0994032879..596895c4deb3f833ae9b91809bb3961f9f9d12cb 100644
>--- a/Source/WebCore/platform/graphics/avfoundation/objc/InbandTextTrackPrivateLegacyAVFObjC.h
>+++ b/Source/WebCore/platform/graphics/avfoundation/objc/InbandTextTrackPrivateLegacyAVFObjC.h
>@@ -51,8 +51,8 @@ public:
> bool containsOnlyForcedSubtitles() const override;
> bool isMainProgramContent() const override;
> bool isEasyToRead() const override;
>- AtomicString label() const override;
>- AtomicString language() const override;
>+ AtomString label() const override;
>+ AtomString language() const override;
> 
> void disconnect() override;
> 
>diff --git a/Source/WebCore/platform/graphics/avfoundation/objc/InbandTextTrackPrivateLegacyAVFObjC.mm b/Source/WebCore/platform/graphics/avfoundation/objc/InbandTextTrackPrivateLegacyAVFObjC.mm
>index ba0dfdea3e4ab45d71ab790e931f4764a31ba427..40fc3171bfde42bc6c6a4e1ef4a02688ef08e108 100644
>--- a/Source/WebCore/platform/graphics/avfoundation/objc/InbandTextTrackPrivateLegacyAVFObjC.mm
>+++ b/Source/WebCore/platform/graphics/avfoundation/objc/InbandTextTrackPrivateLegacyAVFObjC.mm
>@@ -78,7 +78,7 @@ bool InbandTextTrackPrivateLegacyAVFObjC::isEasyToRead() const
> return false;
> }
> 
>-AtomicString InbandTextTrackPrivateLegacyAVFObjC::label() const
>+AtomString InbandTextTrackPrivateLegacyAVFObjC::label() const
> {
> if (!m_playerItemTrack)
> return emptyAtom();
>@@ -96,10 +96,10 @@ AtomicString InbandTextTrackPrivateLegacyAVFObjC::label() const
> title = [[titles objectAtIndex:0] stringValue];
> }
> 
>- return title ? AtomicString(title) : emptyAtom();
>+ return title ? AtomString(title) : emptyAtom();
> }
> 
>-AtomicString InbandTextTrackPrivateLegacyAVFObjC::language() const
>+AtomString InbandTextTrackPrivateLegacyAVFObjC::language() const
> {
> if (!m_playerItemTrack)
> return emptyAtom();
>diff --git a/Source/WebCore/platform/graphics/avfoundation/objc/MediaPlayerPrivateAVFoundationObjC.mm b/Source/WebCore/platform/graphics/avfoundation/objc/MediaPlayerPrivateAVFoundationObjC.mm
>index 94365fe10e2f574075308eaa158aed890998d1aa..8b474644fd2b5b86e73d04f9e410902fbd5a344d 100644
>--- a/Source/WebCore/platform/graphics/avfoundation/objc/MediaPlayerPrivateAVFoundationObjC.mm
>+++ b/Source/WebCore/platform/graphics/avfoundation/objc/MediaPlayerPrivateAVFoundationObjC.mm
>@@ -2935,13 +2935,13 @@ void MediaPlayerPrivateAVFoundationObjC::setBufferingPolicy(MediaPlayer::Bufferi
> 
> #if ENABLE(DATACUE_VALUE)
> 
>-static const AtomicString& metadataType(NSString *avMetadataKeySpace)
>+static const AtomString& metadataType(NSString *avMetadataKeySpace)
> {
>- static NeverDestroyed<const AtomicString> quickTimeUserData("com.apple.quicktime.udta", AtomicString::ConstructFromLiteral);
>- static NeverDestroyed<const AtomicString> isoUserData("org.mp4ra", AtomicString::ConstructFromLiteral);
>- static NeverDestroyed<const AtomicString> quickTimeMetadata("com.apple.quicktime.mdta", AtomicString::ConstructFromLiteral);
>- static NeverDestroyed<const AtomicString> iTunesMetadata("com.apple.itunes", AtomicString::ConstructFromLiteral);
>- static NeverDestroyed<const AtomicString> id3Metadata("org.id3", AtomicString::ConstructFromLiteral);
>+ static NeverDestroyed<const AtomString> quickTimeUserData("com.apple.quicktime.udta", AtomString::ConstructFromLiteral);
>+ static NeverDestroyed<const AtomString> isoUserData("org.mp4ra", AtomString::ConstructFromLiteral);
>+ static NeverDestroyed<const AtomString> quickTimeMetadata("com.apple.quicktime.mdta", AtomString::ConstructFromLiteral);
>+ static NeverDestroyed<const AtomString> iTunesMetadata("com.apple.itunes", AtomString::ConstructFromLiteral);
>+ static NeverDestroyed<const AtomString> id3Metadata("org.id3", AtomString::ConstructFromLiteral);
> 
> if ([avMetadataKeySpace isEqualToString:AVMetadataKeySpaceQuickTimeUserData])
> return quickTimeUserData;
>@@ -2992,7 +2992,7 @@ void MediaPlayerPrivateAVFoundationObjC::metadataDidArrive(const RetainPtr<NSArr
> if (CMTIME_IS_VALID(item.duration))
> end = start + PAL::toMediaTime(item.duration);
> 
>- AtomicString type = nullAtom();
>+ AtomString type = nullAtom();
> if (item.keySpace)
> type = metadataType(item.keySpace);
> 
>diff --git a/Source/WebCore/platform/graphics/avfoundation/objc/MediaSampleAVFObjC.h b/Source/WebCore/platform/graphics/avfoundation/objc/MediaSampleAVFObjC.h
>index 06eb4684d891cb4dd06c7173e7fe86536a2d90a5..4b97a9a0c30ae2f7ff68b49c27913d0d3e24a14d 100644
>--- a/Source/WebCore/platform/graphics/avfoundation/objc/MediaSampleAVFObjC.h
>+++ b/Source/WebCore/platform/graphics/avfoundation/objc/MediaSampleAVFObjC.h
>@@ -35,7 +35,7 @@ namespace WebCore {
> class MediaSampleAVFObjC : public MediaSample {
> public:
> static Ref<MediaSampleAVFObjC> create(CMSampleBufferRef sample, int trackID) { return adoptRef(*new MediaSampleAVFObjC(sample, trackID)); }
>- static Ref<MediaSampleAVFObjC> create(CMSampleBufferRef sample, AtomicString trackID) { return adoptRef(*new MediaSampleAVFObjC(sample, trackID)); }
>+ static Ref<MediaSampleAVFObjC> create(CMSampleBufferRef sample, AtomString trackID) { return adoptRef(*new MediaSampleAVFObjC(sample, trackID)); }
> static Ref<MediaSampleAVFObjC> create(CMSampleBufferRef sample, VideoRotation rotation = VideoRotation::None, bool mirrored = false) { return adoptRef(*new MediaSampleAVFObjC(sample, rotation, mirrored)); }
> static RefPtr<MediaSampleAVFObjC> createImageSample(Vector<uint8_t>&&, unsigned long width, unsigned long height);
> 
>@@ -47,7 +47,7 @@ public:
> MediaTime duration() const override;
> MediaTime outputDuration() const override;
> 
>- AtomicString trackID() const override { return m_id; }
>+ AtomString trackID() const override { return m_id; }
> void setTrackID(const String& id) override { m_id = id; }
> 
> size_t sizeInBytes() const override;
>@@ -79,14 +79,14 @@ protected:
> : m_sample(sample)
> {
> }
>- MediaSampleAVFObjC(CMSampleBufferRef sample, AtomicString trackID)
>+ MediaSampleAVFObjC(CMSampleBufferRef sample, AtomString trackID)
> : m_sample(sample)
> , m_id(trackID)
> {
> }
> MediaSampleAVFObjC(CMSampleBufferRef sample, int trackID)
> : m_sample(sample)
>- , m_id(AtomicString::number(trackID))
>+ , m_id(AtomString::number(trackID))
> {
> }
> MediaSampleAVFObjC(CMSampleBufferRef sample, VideoRotation rotation, bool mirrored)
>@@ -98,7 +98,7 @@ protected:
> 
> virtual ~MediaSampleAVFObjC() = default;
> RetainPtr<CMSampleBufferRef> m_sample;
>- AtomicString m_id;
>+ AtomString m_id;
> VideoRotation m_rotation { VideoRotation::None };
> bool m_mirrored { false };
> };
>diff --git a/Source/WebCore/platform/graphics/avfoundation/objc/MediaSourcePrivateAVFObjC.mm b/Source/WebCore/platform/graphics/avfoundation/objc/MediaSourcePrivateAVFObjC.mm
>index 163297b5ebf315b5bb0a4dac0f85df060a521bde..4da09d2b178c22e63d1eee5bf3b1b9fa7ecb28e6 100644
>--- a/Source/WebCore/platform/graphics/avfoundation/objc/MediaSourcePrivateAVFObjC.mm
>+++ b/Source/WebCore/platform/graphics/avfoundation/objc/MediaSourcePrivateAVFObjC.mm
>@@ -38,7 +38,7 @@
> #import <objc/runtime.h>
> #import <wtf/Algorithms.h>
> #import <wtf/SoftLinking.h>
>-#import <wtf/text/AtomicString.h>
>+#import <wtf/text/AtomString.h>
> 
> namespace WebCore {
> 
>diff --git a/Source/WebCore/platform/graphics/avfoundation/objc/SourceBufferPrivateAVFObjC.h b/Source/WebCore/platform/graphics/avfoundation/objc/SourceBufferPrivateAVFObjC.h
>index 705082e2c1d46c655ad005d16d36cf474203b2e1..7f75af956b67247ec11d25be8017cfb1340cfacb 100644
>--- a/Source/WebCore/platform/graphics/avfoundation/objc/SourceBufferPrivateAVFObjC.h
>+++ b/Source/WebCore/platform/graphics/avfoundation/objc/SourceBufferPrivateAVFObjC.h
>@@ -39,7 +39,7 @@
> #include <wtf/RetainPtr.h>
> #include <wtf/Vector.h>
> #include <wtf/WeakPtr.h>
>-#include <wtf/text/AtomicString.h>
>+#include <wtf/text/AtomString.h>
> #include <wtf/threads/BinarySemaphore.h>
> 
> OBJC_CLASS AVAsset;
>@@ -158,11 +158,11 @@ private:
> void removedFromMediaSource() final;
> MediaPlayer::ReadyState readyState() const final;
> void setReadyState(MediaPlayer::ReadyState) final;
>- void flush(const AtomicString& trackID) final;
>- void enqueueSample(Ref<MediaSample>&&, const AtomicString& trackID) final;
>- bool isReadyForMoreSamples(const AtomicString& trackID) final;
>+ void flush(const AtomString& trackID) final;
>+ void enqueueSample(Ref<MediaSample>&&, const AtomString& trackID) final;
>+ bool isReadyForMoreSamples(const AtomString& trackID) final;
> void setActive(bool) final;
>- void notifyClientWhenReadyForMoreSamples(const AtomicString& trackID) final;
>+ void notifyClientWhenReadyForMoreSamples(const AtomString& trackID) final;
> bool canSwitchToType(const ContentType&) final;
> 
> void didBecomeReadyForMoreSamples(int trackID);
>diff --git a/Source/WebCore/platform/graphics/avfoundation/objc/SourceBufferPrivateAVFObjC.mm b/Source/WebCore/platform/graphics/avfoundation/objc/SourceBufferPrivateAVFObjC.mm
>index 4b877b98622b80b551b1b539de6a79d2ce9a102d..7d829f023edc1bc9047d9e97b89a49309fa587f1 100644
>--- a/Source/WebCore/platform/graphics/avfoundation/objc/SourceBufferPrivateAVFObjC.mm
>+++ b/Source/WebCore/platform/graphics/avfoundation/objc/SourceBufferPrivateAVFObjC.mm
>@@ -59,7 +59,7 @@
> #import <wtf/SoftLinking.h>
> #import <wtf/WTFSemaphore.h>
> #import <wtf/WeakPtr.h>
>-#import <wtf/text/AtomicString.h>
>+#import <wtf/text/AtomString.h>
> #import <wtf/text/CString.h>
> 
> #pragma mark - Soft Linking
>@@ -396,7 +396,7 @@ public:
> static Ref<MediaDescriptionAVFObjC> create(AVAssetTrack* track) { return adoptRef(*new MediaDescriptionAVFObjC(track)); }
> virtual ~MediaDescriptionAVFObjC() { }
> 
>- AtomicString codec() const override { return m_codec; }
>+ AtomString codec() const override { return m_codec; }
> bool isVideo() const override { return m_isVideo; }
> bool isAudio() const override { return m_isAudio; }
> bool isText() const override { return m_isText; }
>@@ -411,11 +411,11 @@ protected:
> CMFormatDescriptionRef description = [formatDescriptions count] ? (__bridge CMFormatDescriptionRef)[formatDescriptions objectAtIndex:0] : 0;
> if (description) {
> FourCharCode codec = CMFormatDescriptionGetMediaSubType(description);
>- m_codec = AtomicString(reinterpret_cast<LChar*>(&codec), 4);
>+ m_codec = AtomString(reinterpret_cast<LChar*>(&codec), 4);
> }
> }
> 
>- AtomicString m_codec;
>+ AtomString m_codec;
> bool m_isVideo;
> bool m_isAudio;
> bool m_isText;
>@@ -1046,7 +1046,7 @@ ALLOW_NEW_API_WITHOUT_GUARDS_END
> return;
> }
> 
>-void SourceBufferPrivateAVFObjC::flush(const AtomicString& trackIDString)
>+void SourceBufferPrivateAVFObjC::flush(const AtomString& trackIDString)
> {
> int trackID = trackIDString.toInt();
> DEBUG_LOG(LOGIDENTIFIER, trackID);
>@@ -1088,7 +1088,7 @@ ALLOW_NEW_API_WITHOUT_GUARDS_END
> m_mediaSource->player()->setHasAvailableAudioSample(renderer, false);
> }
> 
>-void SourceBufferPrivateAVFObjC::enqueueSample(Ref<MediaSample>&& sample, const AtomicString& trackIDString)
>+void SourceBufferPrivateAVFObjC::enqueueSample(Ref<MediaSample>&& sample, const AtomString& trackIDString)
> {
> int trackID = trackIDString.toInt();
> if (trackID != m_enabledVideoTrackID && !m_audioRenderers.contains(trackID))
>@@ -1168,7 +1168,7 @@ void SourceBufferPrivateAVFObjC::bufferWasConsumed()
> m_mediaSource->player()->setHasAvailableVideoFrame(true);
> }
> 
>-bool SourceBufferPrivateAVFObjC::isReadyForMoreSamples(const AtomicString& trackIDString)
>+bool SourceBufferPrivateAVFObjC::isReadyForMoreSamples(const AtomString& trackIDString)
> {
> int trackID = trackIDString.toInt();
> if (trackID == m_enabledVideoTrackID) {
>@@ -1223,10 +1223,10 @@ void SourceBufferPrivateAVFObjC::didBecomeReadyForMoreSamples(int trackID)
> return;
> 
> if (m_client)
>- m_client->sourceBufferPrivateDidBecomeReadyForMoreSamples(AtomicString::number(trackID));
>+ m_client->sourceBufferPrivateDidBecomeReadyForMoreSamples(AtomString::number(trackID));
> }
> 
>-void SourceBufferPrivateAVFObjC::notifyClientWhenReadyForMoreSamples(const AtomicString& trackIDString)
>+void SourceBufferPrivateAVFObjC::notifyClientWhenReadyForMoreSamples(const AtomString& trackIDString)
> {
> int trackID = trackIDString.toInt();
> if (trackID == m_enabledVideoTrackID) {
>@@ -1284,7 +1284,7 @@ void SourceBufferPrivateAVFObjC::setVideoLayer(AVSampleBufferDisplayLayer* layer
> }];
> [m_errorListener beginObservingLayer:m_displayLayer.get()];
> if (m_client)
>- m_client->sourceBufferPrivateReenqueSamples(AtomicString::number(m_enabledVideoTrackID));
>+ m_client->sourceBufferPrivateReenqueSamples(AtomString::number(m_enabledVideoTrackID));
> }
> }
> 
>@@ -1314,7 +1314,7 @@ void SourceBufferPrivateAVFObjC::setDecompressionSession(WebCoreDecompressionSes
> weakThis->m_mediaSource->player()->setHasAvailableVideoFrame(true);
> });
> if (m_client)
>- m_client->sourceBufferPrivateReenqueSamples(AtomicString::number(m_enabledVideoTrackID));
>+ m_client->sourceBufferPrivateReenqueSamples(AtomString::number(m_enabledVideoTrackID));
> }
> 
> #if !RELEASE_LOG_DISABLED
>diff --git a/Source/WebCore/platform/graphics/cocoa/FontCacheCoreText.cpp b/Source/WebCore/platform/graphics/cocoa/FontCacheCoreText.cpp
>index 8d9d1f0f3cc6ab9f5074bbe3550a98c07edffaa1..cf281a7444f9e72a4e1a0a6644ee5dcdf3db3085 100644
>--- a/Source/WebCore/platform/graphics/cocoa/FontCacheCoreText.cpp
>+++ b/Source/WebCore/platform/graphics/cocoa/FontCacheCoreText.cpp
>@@ -690,7 +690,7 @@ RetainPtr<CTFontRef> preparePlatformFont(CTFontRef originalFont, const FontDescr
> return result;
> }
> 
>-RefPtr FontCache::similarFont(const FontDescription& description, const AtomicString& family)
>+RefPtr FontCache::similarFont(const FontDescription& description, const AtomString& family)
> {
> // Attempt to find an appropriate font using a match based on the presence of keywords in
> // the requested names. For example, we'll match any name that contains "Arabic" to Geeza Pro.
>@@ -700,13 +700,13 @@ RefPtr FontCache::similarFont(const FontDescription& description, const At
> #if PLATFORM(IOS_FAMILY)
> // Substitute the default monospace font for well-known monospace fonts.
> if (equalLettersIgnoringASCIICase(family, "monaco") || equalLettersIgnoringASCIICase(family, "menlo")) {
>- static NeverDestroyed<AtomicString> courier("courier", AtomicString::ConstructFromLiteral);
>+ static NeverDestroyed<AtomString> courier("courier", AtomString::ConstructFromLiteral);
> return fontForFamily(description, courier);
> }
> 
> // Substitute Verdana for Lucida Grande.
> if (equalLettersIgnoringASCIICase(family, "lucida grande")) {
>- static NeverDestroyed<AtomicString> verdana("verdana", AtomicString::ConstructFromLiteral);
>+ static NeverDestroyed<AtomString> verdana("verdana", AtomString::ConstructFromLiteral);
> return fontForFamily(description, verdana);
> }
> #endif
>@@ -715,8 +715,8 @@ RefPtr FontCache::similarFont(const FontDescription& description, const At
> static NeverDestroyed<String> pashto(MAKE_STATIC_STRING_IMPL("Pashto"));
> static NeverDestroyed<String> urdu(MAKE_STATIC_STRING_IMPL("Urdu"));
> static String* matchWords[3] = { &arabic.get(), &pashto.get(), &urdu.get() };
>- static NeverDestroyed<AtomicString> geezaPlain("GeezaPro", AtomicString::ConstructFromLiteral);
>- static NeverDestroyed<AtomicString> geezaBold("GeezaPro-Bold", AtomicString::ConstructFromLiteral);
>+ static NeverDestroyed<AtomString> geezaPlain("GeezaPro", AtomString::ConstructFromLiteral);
>+ static NeverDestroyed<AtomString> geezaBold("GeezaPro-Bold", AtomString::ConstructFromLiteral);
> for (String* matchWord : matchWords) {
> if (family.containsIgnoringASCIICase(*matchWord))
> return fontForFamily(description, isFontWeightBold(description.weight()) ? geezaBold : geezaPlain);
>@@ -830,9 +830,9 @@ void FontCache::setFontWhitelist(const Vector<String>& inputWhitelist)
> whitelist.add(item);
> }
> 
>-static inline bool isSystemFont(const AtomicString& family)
>+static inline bool isSystemFont(const AtomString& family)
> {
>- // AtomicString's operator[] handles out-of-bounds by returning 0.
>+ // AtomString's operator[] handles out-of-bounds by returning 0.
> return family[0] == '.';
> }
> 
>@@ -945,7 +945,7 @@ public:
> return m_familyNameToFontDescriptors.add(folded.isolatedCopy(), WTFMove(installedFontFamily)).iterator->value;
> }
> 
>- const InstalledFont& fontForPostScriptName(const AtomicString& postScriptName)
>+ const InstalledFont& fontForPostScriptName(const AtomString& postScriptName)
> {
> const auto& folded = FontCascadeDescription::foldedFamilyName(postScriptName);
> return m_postScriptNameToFontDescriptors.ensure(folded, [&] {
>@@ -1156,7 +1156,7 @@ static const FontDatabase::InstalledFont* findClosestFont(const FontDatabase::In
> return &familyFonts.installedFonts[fontSelectionAlgorithm.indexOfBestCapabilities()];
> }
> 
>-Vector<FontSelectionCapabilities> FontCache::getFontSelectionCapabilitiesInFamily(const AtomicString& familyName, AllowUserInstalledFonts allowUserInstalledFonts)
>+Vector<FontSelectionCapabilities> FontCache::getFontSelectionCapabilitiesInFamily(const AtomString& familyName, AllowUserInstalledFonts allowUserInstalledFonts)
> {
> auto& fontDatabase = allowUserInstalledFonts == AllowUserInstalledFonts::Yes ? FontDatabase::singletonAllowingUserInstalledFonts() : FontDatabase::singletonDisallowingUserInstalledFonts();
> const auto& fonts = fontDatabase.collectionForFamily(familyName.string());
>@@ -1175,7 +1175,7 @@ struct FontLookup {
> bool createdFromPostScriptName { false };
> };
> 
>-static FontLookup platformFontLookupWithFamily(const AtomicString& family, FontSelectionRequest request, float size, AllowUserInstalledFonts allowUserInstalledFonts)
>+static FontLookup platformFontLookupWithFamily(const AtomString& family, FontSelectionRequest request, float size, AllowUserInstalledFonts allowUserInstalledFonts)
> {
> const auto& whitelist = fontWhitelist();
> if (!isSystemFont(family) && whitelist.size() && !whitelist.contains(family))
>@@ -1238,7 +1238,7 @@ static void invalidateFontCache()
> FontCache::singleton().invalidate();
> }
> 
>-static RetainPtr<CTFontRef> fontWithFamily(const AtomicString& family, const FontDescription& fontDescription, const FontFeatureSettings* fontFaceFeatures, const FontVariantSettings* fontFaceVariantSettings, FontSelectionSpecifiedCapabilities fontFaceCapabilities, float size)
>+static RetainPtr<CTFontRef> fontWithFamily(const AtomString& family, const FontDescription& fontDescription, const FontFeatureSettings* fontFaceFeatures, const FontVariantSettings* fontFaceVariantSettings, FontSelectionSpecifiedCapabilities fontFaceCapabilities, float size)
> {
> if (family.isEmpty())
> return nullptr;
>@@ -1252,7 +1252,7 @@ static RetainPtr<CTFontRef> fontWithFamily(const AtomicString& family, const Fon
> }
> 
> #if PLATFORM(MAC)
>-static bool shouldAutoActivateFontIfNeeded(const AtomicString& family)
>+static bool shouldAutoActivateFontIfNeeded(const AtomString& family)
> {
> #ifndef NDEBUG
> // This cache is not thread safe so the following assertion is there to
>@@ -1261,7 +1261,7 @@ static bool shouldAutoActivateFontIfNeeded(const AtomicString& family)
> ASSERT(initThread == &Thread::current());
> #endif
> 
>- static NeverDestroyed<HashSet<AtomicString>> knownFamilies;
>+ static NeverDestroyed<HashSet<AtomString>> knownFamilies;
> static const unsigned maxCacheSize = 128;
> ASSERT(knownFamilies.get().size() <= maxCacheSize);
> if (knownFamilies.get().size() == maxCacheSize)
>@@ -1283,7 +1283,7 @@ static void autoActivateFont(const String& name, CGFloat size)
> }
> #endif
> 
>-std::unique_ptr<FontPlatformData> FontCache::createFontPlatformData(const FontDescription& fontDescription, const AtomicString& family, const FontFeatureSettings* fontFaceFeatures, const FontVariantSettings* fontFaceVariantSettings, FontSelectionSpecifiedCapabilities fontFaceCapabilities)
>+std::unique_ptr<FontPlatformData> FontCache::createFontPlatformData(const FontDescription& fontDescription, const AtomString& family, const FontFeatureSettings* fontFaceFeatures, const FontVariantSettings* fontFaceVariantSettings, FontSelectionSpecifiedCapabilities fontFaceCapabilities)
> {
> float size = fontDescription.computedPixelSize();
> 
>@@ -1339,7 +1339,7 @@ static inline bool isArabicCharacter(UChar character)
> }
> #endif
> 
>-static RetainPtr<CTFontRef> lookupFallbackFont(CTFontRef font, FontSelectionValue fontWeight, const AtomicString& locale, const UChar* characters, unsigned length)
>+static RetainPtr<CTFontRef> lookupFallbackFont(CTFontRef font, FontSelectionValue fontWeight, const AtomString& locale, const UChar* characters, unsigned length)
> {
> ASSERT(length > 0);
> 
>@@ -1417,7 +1417,7 @@ RefPtr FontCache::systemFallbackForCharacters(const FontDescription& descr
> return fontForPlatformData(alternateFont);
> }
> 
>-const AtomicString& FontCache::platformAlternateFamilyName(const AtomicString& familyName)
>+const AtomString& FontCache::platformAlternateFamilyName(const AtomString& familyName)
> {
> static const UChar heitiString[] = { 0x9ed1, 0x4f53 };
> static const UChar songtiString[] = { 0x5b8b, 0x4f53 };
>@@ -1425,10 +1425,10 @@ const AtomicString& FontCache::platformAlternateFamilyName(const AtomicString& f
> static const UChar weiruanYaHeiString[] = { 0x5fae, 0x8f6f, 0x96c5, 0x9ed1 };
> static const UChar weiruanZhengHeitiString[] = { 0x5fae, 0x8edf, 0x6b63, 0x9ed1, 0x9ad4 };
> 
>- static NeverDestroyed<AtomicString> songtiSC("Songti SC", AtomicString::ConstructFromLiteral);
>- static NeverDestroyed<AtomicString> songtiTC("Songti TC", AtomicString::ConstructFromLiteral);
>- static NeverDestroyed<AtomicString> heitiSCReplacement("PingFang SC", AtomicString::ConstructFromLiteral);
>- static NeverDestroyed<AtomicString> heitiTCReplacement("PingFang TC", AtomicString::ConstructFromLiteral);
>+ static NeverDestroyed<AtomString> songtiSC("Songti SC", AtomString::ConstructFromLiteral);
>+ static NeverDestroyed<AtomString> songtiTC("Songti TC", AtomString::ConstructFromLiteral);
>+ static NeverDestroyed<AtomString> heitiSCReplacement("PingFang SC", AtomString::ConstructFromLiteral);
>+ static NeverDestroyed<AtomString> heitiTCReplacement("PingFang TC", AtomString::ConstructFromLiteral);
> 
> switch (familyName.length()) {
> case 2:
>@@ -1534,7 +1534,7 @@ Ref FontCache::lastResortFallbackFont(const FontDescription& fontDescripti
> {
> // FIXME: Would be even better to somehow get the user's default font here. For now we'll pick
> // the default that the user would get without changing any prefs.
>- if (auto result = fontForFamily(fontDescription, AtomicString("Times", AtomicString::ConstructFromLiteral)))
>+ if (auto result = fontForFamily(fontDescription, AtomString("Times", AtomString::ConstructFromLiteral)))
> return *result;
> 
> // LastResort is guaranteed to be non-null.
>diff --git a/Source/WebCore/platform/graphics/cocoa/FontCacheCoreText.h b/Source/WebCore/platform/graphics/cocoa/FontCacheCoreText.h
>index d11db980743d518fc2eb39ed7f13ace66bf7e07b..b7a806611f778bd136d8bf0dd8a84eb58cd02346 100644
>--- a/Source/WebCore/platform/graphics/cocoa/FontCacheCoreText.h
>+++ b/Source/WebCore/platform/graphics/cocoa/FontCacheCoreText.h
>@@ -52,8 +52,8 @@ struct SynthesisPair {
> 
> RetainPtr<CTFontRef> preparePlatformFont(CTFontRef, const FontDescription&, const FontFeatureSettings* fontFaceFeatures, const FontVariantSettings* fontFaceVariantSettings, FontSelectionSpecifiedCapabilities fontFaceCapabilities, bool applyWeightWidthSlopeVariations = true);
> SynthesisPair computeNecessarySynthesis(CTFontRef, const FontDescription&, bool isPlatformFont = false);
>-RetainPtr<CTFontRef> platformFontWithFamilySpecialCase(const AtomicString& family, FontSelectionRequest, float size, AllowUserInstalledFonts);
>-RetainPtr<CTFontRef> platformFontWithFamily(const AtomicString& family, FontSelectionRequest, TextRenderingMode, float size);
>+RetainPtr<CTFontRef> platformFontWithFamilySpecialCase(const AtomString& family, FontSelectionRequest, float size, AllowUserInstalledFonts);
>+RetainPtr<CTFontRef> platformFontWithFamily(const AtomString& family, FontSelectionRequest, TextRenderingMode, float size);
> bool requiresCustomFallbackFont(UChar32 character);
> FontSelectionCapabilities capabilitiesForFontDescriptor(CTFontDescriptorRef);
> void addAttributesForInstalledFonts(CFMutableDictionaryRef attributes, AllowUserInstalledFonts);
>diff --git a/Source/WebCore/platform/graphics/cocoa/FontDescriptionCocoa.cpp b/Source/WebCore/platform/graphics/cocoa/FontDescriptionCocoa.cpp
>index 8b9c4348d4743358cef0b658a42f58fa2e6c9761..19c76360165a4bbbe8b958e936b273f8a114b5bf 100644
>--- a/Source/WebCore/platform/graphics/cocoa/FontDescriptionCocoa.cpp
>+++ b/Source/WebCore/platform/graphics/cocoa/FontDescriptionCocoa.cpp
>@@ -34,7 +34,7 @@ namespace WebCore {
> 
> #if USE_PLATFORM_SYSTEM_FALLBACK_LIST
> 
>-static inline bool isSystemFontString(const AtomicString& string)
>+static inline bool isSystemFontString(const AtomString& string)
> {
> return equalLettersIgnoringASCIICase(string, "-webkit-system-font")
> || equalLettersIgnoringASCIICase(string, "-apple-system")
>@@ -54,7 +54,7 @@ template<typename T, typename U, std::size_t size> inline std::array<T, size> co
> return convertArray<T>(array, std::make_index_sequence<size> { });
> }
> 
>-static inline bool isUIFontTextStyle(const AtomicString& string)
>+static inline bool isUIFontTextStyle(const AtomString& string)
> {
> static const CFStringRef styles[] = {
> kCTUIFontTextStyleHeadline,
>@@ -78,12 +78,12 @@ static inline bool isUIFontTextStyle(const AtomicString& string)
> #endif
> };
> 
>- static auto strings { makeNeverDestroyed(convertArray<AtomicString>(styles)) };
>+ static auto strings { makeNeverDestroyed(convertArray<AtomString>(styles)) };
> return std::find(strings.get().begin(), strings.get().end(), string) != strings.get().end();
> }
> #endif
> 
>-static inline Vector<RetainPtr<CTFontDescriptorRef>> systemFontCascadeList(const FontCascadeDescription& description, const AtomicString& cssFamily, SystemFontDatabaseCoreText::ClientUse clientUse, AllowUserInstalledFonts allowUserInstalledFonts)
>+static inline Vector<RetainPtr<CTFontDescriptorRef>> systemFontCascadeList(const FontCascadeDescription& description, const AtomString& cssFamily, SystemFontDatabaseCoreText::ClientUse clientUse, AllowUserInstalledFonts allowUserInstalledFonts)
> {
> return SystemFontDatabaseCoreText::singleton().cascadeList(description, cssFamily, clientUse, allowUserInstalledFonts);
> }
>@@ -163,7 +163,7 @@ static void languageChanged(void*)
> cachedSpecializedChineseLocale() = computeSpecializedChineseLocale();
> }
> 
>-AtomicString FontDescription::platformResolveGenericFamily(UScriptCode script, const AtomicString& locale, const AtomicString& familyName)
>+AtomString FontDescription::platformResolveGenericFamily(UScriptCode script, const AtomString& locale, const AtomString& familyName)
> {
> ASSERT((locale.isNull() && script == USCRIPT_COMMON) || !locale.isNull());
> if (script == USCRIPT_COMMON)
>diff --git a/Source/WebCore/platform/graphics/cocoa/SystemFontDatabaseCoreText.cpp b/Source/WebCore/platform/graphics/cocoa/SystemFontDatabaseCoreText.cpp
>index b1346815e9e0c049433cc6609a3ce7b2a9b2f73b..b3d02ff855a89ae493dabe9380870248911fd8aa 100644
>--- a/Source/WebCore/platform/graphics/cocoa/SystemFontDatabaseCoreText.cpp
>+++ b/Source/WebCore/platform/graphics/cocoa/SystemFontDatabaseCoreText.cpp
>@@ -129,7 +129,7 @@ Vector<RetainPtr<CTFontDescriptorRef>> SystemFontDatabaseCoreText::computeCascad
> return result;
> }
> 
>-SystemFontDatabaseCoreText::CascadeListParameters SystemFontDatabaseCoreText::systemFontParameters(const FontCascadeDescription& description, const AtomicString& familyName, ClientUse clientUse, AllowUserInstalledFonts allowUserInstalledFonts)
>+SystemFontDatabaseCoreText::CascadeListParameters SystemFontDatabaseCoreText::systemFontParameters(const FontCascadeDescription& description, const AtomString& familyName, ClientUse clientUse, AllowUserInstalledFonts allowUserInstalledFonts)
> {
> CascadeListParameters result;
> result.locale = description.locale();
>@@ -160,7 +160,7 @@ SystemFontDatabaseCoreText::CascadeListParameters SystemFontDatabaseCoreText::sy
> result.weight = kCTFontWeightBlack;
> 
> if (clientUse == ClientUse::ForSystemUI) {
>- static NeverDestroyed<AtomicString> systemUI = AtomicString("system-ui", AtomicString::ConstructFromLiteral);
>+ static NeverDestroyed<AtomString> systemUI = AtomString("system-ui", AtomString::ConstructFromLiteral);
> result.fontName = systemUI.get();
> } else {
> ASSERT(clientUse == ClientUse::ForTextStyle);
>@@ -172,7 +172,7 @@ SystemFontDatabaseCoreText::CascadeListParameters SystemFontDatabaseCoreText::sy
> return result;
> }
> 
>-Vector<RetainPtr<CTFontDescriptorRef>> SystemFontDatabaseCoreText::cascadeList(const FontCascadeDescription& description, const AtomicString& cssFamily, ClientUse clientUse, AllowUserInstalledFonts allowUserInstalledFonts)
>+Vector<RetainPtr<CTFontDescriptorRef>> SystemFontDatabaseCoreText::cascadeList(const FontCascadeDescription& description, const AtomString& cssFamily, ClientUse clientUse, AllowUserInstalledFonts allowUserInstalledFonts)
> {
> return cascadeList(systemFontParameters(description, cssFamily, clientUse, allowUserInstalledFonts), clientUse);
> }
>diff --git a/Source/WebCore/platform/graphics/cocoa/SystemFontDatabaseCoreText.h b/Source/WebCore/platform/graphics/cocoa/SystemFontDatabaseCoreText.h
>index 35e354670b5dba4ac556e1f8d2de7e5323579e2c..323ab298f0632eaa755c8fa7c0285f08b13fb6b0 100644
>--- a/Source/WebCore/platform/graphics/cocoa/SystemFontDatabaseCoreText.h
>+++ b/Source/WebCore/platform/graphics/cocoa/SystemFontDatabaseCoreText.h
>@@ -29,8 +29,8 @@
> #include <pal/spi/cocoa/CoreTextSPI.h>
> #include <wtf/HashMap.h>
> #include <wtf/HashTraits.h>
>-#include <wtf/text/AtomicString.h>
>-#include <wtf/text/AtomicStringHash.h>
>+#include <wtf/text/AtomString.h>
>+#include <wtf/text/AtomStringHash.h>
> 
> namespace WebCore {
> 
>@@ -74,7 +74,7 @@ public:
> return hasher.hash();
> }
> 
>- struct CascadeListParametersHash : WTF::PairHash<AtomicString, float> {
>+ struct CascadeListParametersHash : WTF::PairHash<AtomString, float> {
> static unsigned hash(const CascadeListParameters& parameters)
> {
> return parameters.hash();
>@@ -86,8 +86,8 @@ public:
> static const bool safeToCompareToEmptyOrDeleted = true;
> };
> 
>- AtomicString fontName;
>- AtomicString locale;
>+ AtomString fontName;
>+ AtomString locale;
> CGFloat weight { 0 };
> float size { 0 };
> AllowUserInstalledFonts allowUserInstalledFonts { AllowUserInstalledFonts::No };
>@@ -98,7 +98,7 @@ public:
> 
> enum class ClientUse { ForSystemUI, ForTextStyle };
> 
>- Vector<RetainPtr<CTFontDescriptorRef>> cascadeList(const FontCascadeDescription&, const AtomicString& cssFamily, ClientUse, AllowUserInstalledFonts);
>+ Vector<RetainPtr<CTFontDescriptorRef>> cascadeList(const FontCascadeDescription&, const AtomString& cssFamily, ClientUse, AllowUserInstalledFonts);
> 
> String serifFamily(const String& locale);
> String sansSerifFamily(const String& locale);
>@@ -116,7 +116,7 @@ private:
> static RetainPtr<CTFontRef> applyWeightItalicsAndFallbackBehavior(CTFontRef, CGFloat weight, bool italic, float size, AllowUserInstalledFonts);
> static RetainPtr<CTFontDescriptorRef> removeCascadeList(CTFontDescriptorRef);
> static Vector<RetainPtr<CTFontDescriptorRef>> computeCascadeList(CTFontRef, CFStringRef locale);
>- static CascadeListParameters systemFontParameters(const FontCascadeDescription&, const AtomicString& familyName, ClientUse, AllowUserInstalledFonts);
>+ static CascadeListParameters systemFontParameters(const FontCascadeDescription&, const AtomString& familyName, ClientUse, AllowUserInstalledFonts);
> 
> HashMap<CascadeListParameters, Vector<RetainPtr<CTFontDescriptorRef>>, CascadeListParameters::CascadeListParametersHash, SimpleClassHashTraits<CascadeListParameters>> m_systemFontCache;
> 
>diff --git a/Source/WebCore/platform/graphics/filters/SourceAlpha.cpp b/Source/WebCore/platform/graphics/filters/SourceAlpha.cpp
>index acb73823a7a9e7b8120d879fa4581cbd47f1b559..3a680a298536855e7b1651d1fded841580893f8a 100644
>--- a/Source/WebCore/platform/graphics/filters/SourceAlpha.cpp
>+++ b/Source/WebCore/platform/graphics/filters/SourceAlpha.cpp
>@@ -35,9 +35,9 @@ Ref<SourceAlpha> SourceAlpha::create(FilterEffect& sourceEffect)
> return adoptRef(*new SourceAlpha(sourceEffect));
> }
> 
>-const AtomicString& SourceAlpha::effectName()
>+const AtomString& SourceAlpha::effectName()
> {
>- static NeverDestroyed<const AtomicString> s_effectName("SourceAlpha", AtomicString::ConstructFromLiteral);
>+ static NeverDestroyed<const AtomString> s_effectName("SourceAlpha", AtomString::ConstructFromLiteral);
> return s_effectName;
> }
> 
>diff --git a/Source/WebCore/platform/graphics/filters/SourceAlpha.h b/Source/WebCore/platform/graphics/filters/SourceAlpha.h
>index 7d1a311efa42672e66ad5661eef63a62536fb5d1..6629a367fd43242d1c4aade64c561e864a39490f 100644
>--- a/Source/WebCore/platform/graphics/filters/SourceAlpha.h
>+++ b/Source/WebCore/platform/graphics/filters/SourceAlpha.h
>@@ -28,7 +28,7 @@ class SourceAlpha : public FilterEffect {
> public: 
> static Ref<SourceAlpha> create(FilterEffect&);
> 
>- static const AtomicString& effectName();
>+ static const AtomString& effectName();
> 
> private:
> explicit SourceAlpha(FilterEffect&);
>diff --git a/Source/WebCore/platform/graphics/filters/SourceGraphic.cpp b/Source/WebCore/platform/graphics/filters/SourceGraphic.cpp
>index 7521a5eb61b22162af94494891208864674f5997..045ee01f223e422fff046fea2f4ca2dde0ddd712 100644
>--- a/Source/WebCore/platform/graphics/filters/SourceGraphic.cpp
>+++ b/Source/WebCore/platform/graphics/filters/SourceGraphic.cpp
>@@ -34,9 +34,9 @@ Ref<SourceGraphic> SourceGraphic::create(Filter& filter)
> return adoptRef(*new SourceGraphic(filter));
> }
> 
>-const AtomicString& SourceGraphic::effectName()
>+const AtomString& SourceGraphic::effectName()
> {
>- static NeverDestroyed<const AtomicString> s_effectName("SourceGraphic", AtomicString::ConstructFromLiteral);
>+ static NeverDestroyed<const AtomString> s_effectName("SourceGraphic", AtomString::ConstructFromLiteral);
> return s_effectName;
> }
> 
>diff --git a/Source/WebCore/platform/graphics/filters/SourceGraphic.h b/Source/WebCore/platform/graphics/filters/SourceGraphic.h
>index 1a0e9c82a8315c377f5937a029377d77a0ab7a91..3615f0e9b61a833ab1d4687aba68ab3214558fdf 100644
>--- a/Source/WebCore/platform/graphics/filters/SourceGraphic.h
>+++ b/Source/WebCore/platform/graphics/filters/SourceGraphic.h
>@@ -30,7 +30,7 @@ class SourceGraphic : public FilterEffect {
> public: 
> static Ref<SourceGraphic> create(Filter&);
> 
>- static const AtomicString& effectName();
>+ static const AtomString& effectName();
> 
> private:
> SourceGraphic(Filter& filter)
>diff --git a/Source/WebCore/platform/graphics/freetype/FontCacheFreeType.cpp b/Source/WebCore/platform/graphics/freetype/FontCacheFreeType.cpp
>index db0485dbc33ae86c03abf0f3f79dd89fb9a8de5b..53b777ea6b7ea73f675e6505d21f55c8112f5c1b 100644
>--- a/Source/WebCore/platform/graphics/freetype/FontCacheFreeType.cpp
>+++ b/Source/WebCore/platform/graphics/freetype/FontCacheFreeType.cpp
>@@ -190,7 +190,7 @@ Ref FontCache::lastResortFallbackFont(const FontDescription& fontDescripti
> {
> // We want to return a fallback font here, otherwise the logic preventing FontConfig
> // matches for non-fallback fonts might return 0. See isFallbackFontAllowed.
>- static AtomicString timesStr("serif");
>+ static AtomString timesStr("serif");
> if (RefPtr font = fontForFamily(fontDescription, timesStr))
> return *font;
> 
>@@ -198,12 +198,12 @@ Ref FontCache::lastResortFallbackFont(const FontDescription& fontDescripti
> RELEASE_ASSERT_NOT_REACHED();
> }
> 
>-Vector<FontSelectionCapabilities> FontCache::getFontSelectionCapabilitiesInFamily(const AtomicString&, AllowUserInstalledFonts)
>+Vector<FontSelectionCapabilities> FontCache::getFontSelectionCapabilitiesInFamily(const AtomString&, AllowUserInstalledFonts)
> {
> return { };
> }
> 
>-static String getFamilyNameStringFromFamily(const AtomicString& family)
>+static String getFamilyNameStringFromFamily(const AtomString& family)
> {
> // If we're creating a fallback font (e.g. "-webkit-monospace"), convert the name into
> // the fallback name (like "monospace") that fontconfig understands.
>@@ -371,7 +371,7 @@ static inline bool isCommonlyUsedGenericFamily(const String& familyNameString)
> || equalLettersIgnoringASCIICase(familyNameString, "cursive");
> }
> 
>-std::unique_ptr<FontPlatformData> FontCache::createFontPlatformData(const FontDescription& fontDescription, const AtomicString& family, const FontFeatureSettings*, const FontVariantSettings*, FontSelectionSpecifiedCapabilities)
>+std::unique_ptr<FontPlatformData> FontCache::createFontPlatformData(const FontDescription& fontDescription, const AtomString& family, const FontFeatureSettings*, const FontVariantSettings*, FontSelectionSpecifiedCapabilities)
> {
> // The CSS font matching algorithm (http://www.w3.org/TR/css3-fonts/#font-matching-algorithm)
> // says that we must find an exact match for font family, slant (italic or oblique can be used)
>@@ -460,7 +460,7 @@ std::unique_ptr<FontPlatformData> FontCache::createFontPlatformData(const FontDe
> return platformData;
> }
> 
>-const AtomicString& FontCache::platformAlternateFamilyName(const AtomicString&)
>+const AtomString& FontCache::platformAlternateFamilyName(const AtomString&)
> {
> return nullAtom();
> }
>diff --git a/Source/WebCore/platform/graphics/gstreamer/AudioTrackPrivateGStreamer.h b/Source/WebCore/platform/graphics/gstreamer/AudioTrackPrivateGStreamer.h
>index 8b954ae609f807c6ff48089d2fa085f9aaa8d8c3..4d98dd48b19a435d73fac0cf99ed6d2f25e7e857 100644
>--- a/Source/WebCore/platform/graphics/gstreamer/AudioTrackPrivateGStreamer.h
>+++ b/Source/WebCore/platform/graphics/gstreamer/AudioTrackPrivateGStreamer.h
>@@ -60,9 +60,9 @@ public:
> 
> int trackIndex() const override { return m_index; }
> 
>- AtomicString id() const override { return m_id; }
>- AtomicString label() const override { return m_label; }
>- AtomicString language() const override { return m_language; }
>+ AtomString id() const override { return m_id; }
>+ AtomString label() const override { return m_label; }
>+ AtomString language() const override { return m_language; }
> 
> private:
> AudioTrackPrivateGStreamer(WeakPtr<MediaPlayerPrivateGStreamer>, gint index, GRefPtr<GstPad>);
>@@ -70,7 +70,7 @@ private:
> AudioTrackPrivateGStreamer(WeakPtr<MediaPlayerPrivateGStreamer>, gint index, GRefPtr<GstStream>);
> #endif
> 
>- AtomicString m_id;
>+ AtomString m_id;
> WeakPtr<MediaPlayerPrivateGStreamer> m_player;
> };
> 
>diff --git a/Source/WebCore/platform/graphics/gstreamer/GStreamerRegistryScanner.cpp b/Source/WebCore/platform/graphics/gstreamer/GStreamerRegistryScanner.cpp
>index 55ad0ff145017619eec7a0c1d22a143f138b4b23..84870ccc99ad23315616a61591af845212565b3f 100644
>--- a/Source/WebCore/platform/graphics/gstreamer/GStreamerRegistryScanner.cpp
>+++ b/Source/WebCore/platform/graphics/gstreamer/GStreamerRegistryScanner.cpp
>@@ -131,7 +131,7 @@ void GStreamerRegistryScanner::fillMimeTypeSetFromCapsMapping(Vector<GstCapsWebK
> for (const auto& mimeType : current.webkitMimeTypes)
> m_mimeTypeSet.add(mimeType);
> } else
>- m_mimeTypeSet.add(AtomicString(current.capsString));
>+ m_mimeTypeSet.add(AtomString(current.capsString));
> }
> }
> }
>@@ -139,24 +139,24 @@ void GStreamerRegistryScanner::fillMimeTypeSetFromCapsMapping(Vector<GstCapsWebK
> void GStreamerRegistryScanner::initialize()
> {
> if (hasElementForMediaType(m_audioDecoderFactories, "audio/mpeg, mpegversion=(int)4")) {
>- m_mimeTypeSet.add(AtomicString("audio/aac"));
>- m_mimeTypeSet.add(AtomicString("audio/mp4"));
>- m_mimeTypeSet.add(AtomicString("audio/x-m4a"));
>- m_codecMap.add(AtomicString("mpeg"), false);
>- m_codecMap.add(AtomicString("mp4a*"), false);
>+ m_mimeTypeSet.add(AtomString("audio/aac"));
>+ m_mimeTypeSet.add(AtomString("audio/mp4"));
>+ m_mimeTypeSet.add(AtomString("audio/x-m4a"));
>+ m_codecMap.add(AtomString("mpeg"), false);
>+ m_codecMap.add(AtomString("mp4a*"), false);
> }
> 
> auto opusSupported = hasElementForMediaType(m_audioDecoderFactories, "audio/x-opus");
> if (opusSupported && (!m_isMediaSource || hasElementForMediaType(m_audioParserFactories, "audio/x-opus"))) {
>- m_mimeTypeSet.add(AtomicString("audio/opus"));
>- m_codecMap.add(AtomicString("opus"), false);
>- m_codecMap.add(AtomicString("x-opus"), false);
>+ m_mimeTypeSet.add(AtomString("audio/opus"));
>+ m_codecMap.add(AtomString("opus"), false);
>+ m_codecMap.add(AtomString("x-opus"), false);
> }
> 
> auto vorbisSupported = hasElementForMediaType(m_audioDecoderFactories, "audio/x-vorbis");
> if (vorbisSupported && (!m_isMediaSource || hasElementForMediaType(m_audioParserFactories, "audio/x-vorbis"))) {
>- m_codecMap.add(AtomicString("vorbis"), false);
>- m_codecMap.add(AtomicString("x-vorbis"), false);
>+ m_codecMap.add(AtomString("vorbis"), false);
>+ m_codecMap.add(AtomString("x-vorbis"), false);
> }
> 
> if (hasElementForMediaType(m_demuxerFactories, "video/x-matroska")) {
>@@ -164,29 +164,29 @@ void GStreamerRegistryScanner::initialize()
> auto vp9DecoderAvailable = hasElementForMediaType(m_videoDecoderFactories, "video/x-vp9", true);
> 
> if (vp8DecoderAvailable || vp9DecoderAvailable)
>- m_mimeTypeSet.add(AtomicString("video/webm"));
>+ m_mimeTypeSet.add(AtomString("video/webm"));
> 
> if (vp8DecoderAvailable) {
>- m_codecMap.add(AtomicString("vp8"), vp8DecoderAvailable.isUsingHardware);
>- m_codecMap.add(AtomicString("x-vp8"), vp8DecoderAvailable.isUsingHardware);
>- m_codecMap.add(AtomicString("vp8.0"), vp8DecoderAvailable.isUsingHardware);
>+ m_codecMap.add(AtomString("vp8"), vp8DecoderAvailable.isUsingHardware);
>+ m_codecMap.add(AtomString("x-vp8"), vp8DecoderAvailable.isUsingHardware);
>+ m_codecMap.add(AtomString("vp8.0"), vp8DecoderAvailable.isUsingHardware);
> }
> if (vp9DecoderAvailable) {
>- m_codecMap.add(AtomicString("vp9"), vp9DecoderAvailable.isUsingHardware);
>- m_codecMap.add(AtomicString("x-vp9"), vp9DecoderAvailable.isUsingHardware);
>- m_codecMap.add(AtomicString("vp9.0"), vp9DecoderAvailable.isUsingHardware);
>+ m_codecMap.add(AtomString("vp9"), vp9DecoderAvailable.isUsingHardware);
>+ m_codecMap.add(AtomString("x-vp9"), vp9DecoderAvailable.isUsingHardware);
>+ m_codecMap.add(AtomString("vp9.0"), vp9DecoderAvailable.isUsingHardware);
> }
> if (opusSupported)
>- m_mimeTypeSet.add(AtomicString("audio/webm"));
>+ m_mimeTypeSet.add(AtomString("audio/webm"));
> }
> 
> auto h264DecoderAvailable = hasElementForMediaType(m_videoDecoderFactories, "video/x-h264, profile=(string){ constrained-baseline, baseline, high }", true);
> if (h264DecoderAvailable && (!m_isMediaSource || hasElementForMediaType(m_videoParserFactories, "video/x-h264"))) {
>- m_mimeTypeSet.add(AtomicString("video/mp4"));
>- m_mimeTypeSet.add(AtomicString("video/x-m4v"));
>- m_codecMap.add(AtomicString("x-h264"), h264DecoderAvailable.isUsingHardware);
>- m_codecMap.add(AtomicString("avc*"), h264DecoderAvailable.isUsingHardware);
>- m_codecMap.add(AtomicString("mp4v*"), h264DecoderAvailable.isUsingHardware);
>+ m_mimeTypeSet.add(AtomString("video/mp4"));
>+ m_mimeTypeSet.add(AtomString("video/x-m4v"));
>+ m_codecMap.add(AtomString("x-h264"), h264DecoderAvailable.isUsingHardware);
>+ m_codecMap.add(AtomString("avc*"), h264DecoderAvailable.isUsingHardware);
>+ m_codecMap.add(AtomString("mp4v*"), h264DecoderAvailable.isUsingHardware);
> }
> 
> if (m_isMediaSource)
>@@ -223,54 +223,54 @@ void GStreamerRegistryScanner::initialize()
> fillMimeTypeSetFromCapsMapping(mapping);
> 
> if (hasElementForMediaType(m_demuxerFactories, "application/ogg")) {
>- m_mimeTypeSet.add(AtomicString("application/ogg"));
>+ m_mimeTypeSet.add(AtomString("application/ogg"));
> 
> if (vorbisSupported) {
>- m_mimeTypeSet.add(AtomicString("audio/ogg"));
>- m_mimeTypeSet.add(AtomicString("audio/x-vorbis+ogg"));
>+ m_mimeTypeSet.add(AtomString("audio/ogg"));
>+ m_mimeTypeSet.add(AtomString("audio/x-vorbis+ogg"));
> }
> 
> if (hasElementForMediaType(m_audioDecoderFactories, "audio/x-speex")) {
>- m_mimeTypeSet.add(AtomicString("audio/ogg"));
>- m_codecMap.add(AtomicString("speex"), false);
>+ m_mimeTypeSet.add(AtomString("audio/ogg"));
>+ m_codecMap.add(AtomString("speex"), false);
> }
> 
> if (hasElementForMediaType(m_videoDecoderFactories, "video/x-theora")) {
>- m_mimeTypeSet.add(AtomicString("video/ogg"));
>- m_codecMap.add(AtomicString("theora"), false);
>+ m_mimeTypeSet.add(AtomString("video/ogg"));
>+ m_codecMap.add(AtomString("theora"), false);
> }
> }
> 
> bool audioMpegSupported = false;
> if (hasElementForMediaType(m_audioDecoderFactories, "audio/mpeg, mpegversion=(int)1, layer=(int)[1, 3]")) {
> audioMpegSupported = true;
>- m_mimeTypeSet.add(AtomicString("audio/mp1"));
>- m_mimeTypeSet.add(AtomicString("audio/mp3"));
>- m_mimeTypeSet.add(AtomicString("audio/x-mp3"));
>- m_codecMap.add(AtomicString("audio/mp3"), false);
>+ m_mimeTypeSet.add(AtomString("audio/mp1"));
>+ m_mimeTypeSet.add(AtomString("audio/mp3"));
>+ m_mimeTypeSet.add(AtomString("audio/x-mp3"));
>+ m_codecMap.add(AtomString("audio/mp3"), false);
> }
> 
> if (hasElementForMediaType(m_audioDecoderFactories, "audio/mpeg, mpegversion=(int)2")) {
> audioMpegSupported = true;
>- m_mimeTypeSet.add(AtomicString("audio/mp2"));
>+ m_mimeTypeSet.add(AtomString("audio/mp2"));
> }
> 
> audioMpegSupported |= isContainerTypeSupported("audio/mp4");
> if (audioMpegSupported) {
>- m_mimeTypeSet.add(AtomicString("audio/mpeg"));
>- m_mimeTypeSet.add(AtomicString("audio/x-mpeg"));
>+ m_mimeTypeSet.add(AtomString("audio/mpeg"));
>+ m_mimeTypeSet.add(AtomString("audio/x-mpeg"));
> }
> 
> bool matroskaSupported = hasElementForMediaType(m_demuxerFactories, "video/x-matroska");
> if (matroskaSupported) {
>- m_mimeTypeSet.add(AtomicString("video/x-matroska"));
>+ m_mimeTypeSet.add(AtomString("video/x-matroska"));
> 
> if (hasElementForMediaType(m_videoDecoderFactories, "video/x-vp10"))
>- m_mimeTypeSet.add(AtomicString("video/webm"));
>+ m_mimeTypeSet.add(AtomString("video/webm"));
> }
> 
> if ((matroskaSupported || isContainerTypeSupported("video/mp4")) && hasElementForMediaType(m_videoDecoderFactories, "video/x-av1"))
>- m_codecMap.add(AtomicString("av01*"), false);
>+ m_codecMap.add(AtomString("av01*"), false);
> }
> 
> bool GStreamerRegistryScanner::isCodecSupported(String codec, bool shouldCheckForHardwareUse) const
>diff --git a/Source/WebCore/platform/graphics/gstreamer/GStreamerRegistryScanner.h b/Source/WebCore/platform/graphics/gstreamer/GStreamerRegistryScanner.h
>index ee84df5ff295596929b346cb076999c98cef3e01..2ddaec69045799a6a58ab49fae3d7da836e18468 100644
>--- a/Source/WebCore/platform/graphics/gstreamer/GStreamerRegistryScanner.h
>+++ b/Source/WebCore/platform/graphics/gstreamer/GStreamerRegistryScanner.h
>@@ -26,8 +26,8 @@
> #include <wtf/Forward.h>
> #include <wtf/HashMap.h>
> #include <wtf/HashSet.h>
>-#include <wtf/text/AtomicString.h>
>-#include <wtf/text/AtomicStringHash.h>
>+#include <wtf/text/AtomString.h>
>+#include <wtf/text/AtomStringHash.h>
> #include <wtf/text/StringHash.h>
> 
> namespace WebCore {
>@@ -67,8 +67,8 @@ protected:
> struct GstCapsWebKitMapping {
> ElementType elementType;
> const char* capsString;
>- Vector<AtomicString> webkitMimeTypes;
>- Vector<AtomicString> webkitCodecPatterns;
>+ Vector<AtomString> webkitMimeTypes;
>+ Vector<AtomString> webkitCodecPatterns;
> };
> void fillMimeTypeSetFromCapsMapping(Vector<GstCapsWebKitMapping>&);
> 
>@@ -84,7 +84,7 @@ private:
> GList* m_videoParserFactories;
> GList* m_demuxerFactories;
> HashSet<String, ASCIICaseInsensitiveHash> m_mimeTypeSet;
>- HashMap<AtomicString, bool> m_codecMap;
>+ HashMap<AtomString, bool> m_codecMap;
> };
> 
> } // namespace WebCore
>diff --git a/Source/WebCore/platform/graphics/gstreamer/InbandMetadataTextTrackPrivateGStreamer.h b/Source/WebCore/platform/graphics/gstreamer/InbandMetadataTextTrackPrivateGStreamer.h
>index 313b40d1dc2fb5f332b45154ebf545378179e3d8..8346892262227906427ca5947985af4bcd4926fa 100644
>--- a/Source/WebCore/platform/graphics/gstreamer/InbandMetadataTextTrackPrivateGStreamer.h
>+++ b/Source/WebCore/platform/graphics/gstreamer/InbandMetadataTextTrackPrivateGStreamer.h
>@@ -33,7 +33,7 @@ namespace WebCore {
> 
> class InbandMetadataTextTrackPrivateGStreamer : public InbandTextTrackPrivate {
> public:
>- static Ref<InbandMetadataTextTrackPrivateGStreamer> create(Kind kind, CueFormat cueFormat, const AtomicString& id = emptyAtom())
>+ static Ref<InbandMetadataTextTrackPrivateGStreamer> create(Kind kind, CueFormat cueFormat, const AtomString& id = emptyAtom())
> {
> return adoptRef(*new InbandMetadataTextTrackPrivateGStreamer(kind, cueFormat, id));
> }
>@@ -41,9 +41,9 @@ public:
> ~InbandMetadataTextTrackPrivateGStreamer() = default;
> 
> Kind kind() const override { return m_kind; }
>- AtomicString id() const override { return m_id; }
>- AtomicString inBandMetadataTrackDispatchType() const override { return m_inBandMetadataTrackDispatchType; }
>- void setInBandMetadataTrackDispatchType(const AtomicString& value) { m_inBandMetadataTrackDispatchType = value; }
>+ AtomString id() const override { return m_id; }
>+ AtomString inBandMetadataTrackDispatchType() const override { return m_inBandMetadataTrackDispatchType; }
>+ void setInBandMetadataTrackDispatchType(const AtomString& value) { m_inBandMetadataTrackDispatchType = value; }
> 
> void addDataCue(const MediaTime& start, const MediaTime& end, const void* data, unsigned length)
> {
>@@ -58,7 +58,7 @@ public:
> }
> 
> private:
>- InbandMetadataTextTrackPrivateGStreamer(Kind kind, CueFormat cueFormat, const AtomicString& id)
>+ InbandMetadataTextTrackPrivateGStreamer(Kind kind, CueFormat cueFormat, const AtomString& id)
> : InbandTextTrackPrivate(cueFormat)
> , m_kind(kind)
> , m_id(id)
>@@ -67,8 +67,8 @@ private:
> }
> 
> Kind m_kind;
>- AtomicString m_id;
>- AtomicString m_inBandMetadataTrackDispatchType;
>+ AtomString m_id;
>+ AtomString m_inBandMetadataTrackDispatchType;
> };
> 
> } // namespace WebCore
>diff --git a/Source/WebCore/platform/graphics/gstreamer/InbandTextTrackPrivateGStreamer.h b/Source/WebCore/platform/graphics/gstreamer/InbandTextTrackPrivateGStreamer.h
>index e5735b429f327fc6bc29e7bf282514cfd5bb6f1f..f4e2a9789db0761caad40a1c5b63f632e9b15a10 100644
>--- a/Source/WebCore/platform/graphics/gstreamer/InbandTextTrackPrivateGStreamer.h
>+++ b/Source/WebCore/platform/graphics/gstreamer/InbandTextTrackPrivateGStreamer.h
>@@ -53,8 +53,8 @@ public:
> 
> void disconnect() override;
> 
>- AtomicString label() const override { return m_label; }
>- AtomicString language() const override { return m_language; }
>+ AtomString label() const override { return m_label; }
>+ AtomString language() const override { return m_language; }
> 
> int trackIndex() const override { return m_index; }
> String streamId() const { return m_streamId; }
>diff --git a/Source/WebCore/platform/graphics/gstreamer/MediaPlayerPrivateGStreamer.cpp b/Source/WebCore/platform/graphics/gstreamer/MediaPlayerPrivateGStreamer.cpp
>index 4a6dabfbd48957dd47bb1ca55496a89646f858d1..0e0835b01f8acd9d03300520686f05a270e13b2d 100644
>--- a/Source/WebCore/platform/graphics/gstreamer/MediaPlayerPrivateGStreamer.cpp
>+++ b/Source/WebCore/platform/graphics/gstreamer/MediaPlayerPrivateGStreamer.cpp
>@@ -1485,7 +1485,7 @@ void MediaPlayerPrivateGStreamer::processMpegTsSection(GstMpegtsSection* section
> for (guint i = 0; i < pmt->streams->len; ++i) {
> const GstMpegtsPMTStream* stream = static_cast<const GstMpegtsPMTStream*>(g_ptr_array_index(pmt->streams, i));
> if (stream->stream_type == 0x05 || stream->stream_type >= 0x80) {
>- AtomicString pid = String::number(stream->pid);
>+ AtomString pid = String::number(stream->pid);
> auto track = InbandMetadataTextTrackPrivateGStreamer::create(
> InbandTextTrackPrivate::Metadata, InbandTextTrackPrivate::Data, pid);
> 
>@@ -1513,7 +1513,7 @@ void MediaPlayerPrivateGStreamer::processMpegTsSection(GstMpegtsSection* section
> }
> }
> } else {
>- AtomicString pid = String::number(section->pid);
>+ AtomString pid = String::number(section->pid);
> RefPtr<InbandMetadataTextTrackPrivateGStreamer> track = m_metadataTracks.get(pid);
> if (!track)
> return;
>diff --git a/Source/WebCore/platform/graphics/gstreamer/MediaPlayerPrivateGStreamer.h b/Source/WebCore/platform/graphics/gstreamer/MediaPlayerPrivateGStreamer.h
>index 14d9e23d0fa05405fb74828a6372ba4542feeefe..2ed7c8989575eeda2f6a7acfcf1bc0160a376827 100644
>--- a/Source/WebCore/platform/graphics/gstreamer/MediaPlayerPrivateGStreamer.h
>+++ b/Source/WebCore/platform/graphics/gstreamer/MediaPlayerPrivateGStreamer.h
>@@ -38,7 +38,7 @@
> 
> #if ENABLE(VIDEO_TRACK)
> #include "TrackPrivateBaseGStreamer.h"
>-#include <wtf/text/AtomicStringHash.h>
>+#include <wtf/text/AtomStringHash.h>
> #endif
> 
> typedef struct _GstMpegtsSection GstMpegtsSection;
>@@ -277,12 +277,12 @@ private:
> GRefPtr<GstElement> m_downloadBuffer;
> Vector<RefPtr<MediaPlayerRequestInstallMissingPluginsCallback>> m_missingPluginCallbacks;
> #if ENABLE(VIDEO_TRACK)
>- HashMap<AtomicString, RefPtr<AudioTrackPrivateGStreamer>> m_audioTracks;
>- HashMap<AtomicString, RefPtr<InbandTextTrackPrivateGStreamer>> m_textTracks;
>- HashMap<AtomicString, RefPtr<VideoTrackPrivateGStreamer>> m_videoTracks;
>+ HashMap<AtomString, RefPtr<AudioTrackPrivateGStreamer>> m_audioTracks;
>+ HashMap<AtomString, RefPtr<InbandTextTrackPrivateGStreamer>> m_textTracks;
>+ HashMap<AtomString, RefPtr<VideoTrackPrivateGStreamer>> m_videoTracks;
> RefPtr<InbandMetadataTextTrackPrivateGStreamer> m_chaptersTrack;
> #if USE(GSTREAMER_MPEGTS)
>- HashMap<AtomicString, RefPtr<InbandMetadataTextTrackPrivateGStreamer>> m_metadataTracks;
>+ HashMap<AtomString, RefPtr<InbandMetadataTextTrackPrivateGStreamer>> m_metadataTracks;
> #endif
> #endif
> virtual bool isMediaSource() const { return false; }
>diff --git a/Source/WebCore/platform/graphics/gstreamer/MediaPlayerPrivateGStreamerBase.cpp b/Source/WebCore/platform/graphics/gstreamer/MediaPlayerPrivateGStreamerBase.cpp
>index 496619bcf4e07941f453f7f978ed0eb20ad8cd82..6ea36580f2d50e8b380f7d515c6a4017343aa8fd 100644
>--- a/Source/WebCore/platform/graphics/gstreamer/MediaPlayerPrivateGStreamerBase.cpp
>+++ b/Source/WebCore/platform/graphics/gstreamer/MediaPlayerPrivateGStreamerBase.cpp
>@@ -38,7 +38,7 @@
> #include "VideoSinkGStreamer.h"
> #include "WebKitWebSourceGStreamer.h"
> #include <wtf/glib/GUniquePtr.h>
>-#include <wtf/text/AtomicString.h>
>+#include <wtf/text/AtomString.h>
> #include <wtf/text/CString.h>
> #include <wtf/MathExtras.h>
> #include <wtf/StringPrintStream.h>
>diff --git a/Source/WebCore/platform/graphics/gstreamer/MediaSampleGStreamer.cpp b/Source/WebCore/platform/graphics/gstreamer/MediaSampleGStreamer.cpp
>index b66c553f69c0e6d313efd97d4bad433cc39ae524..f5a7dd66d218e47fbd59a2394a918c50d28a5424 100644
>--- a/Source/WebCore/platform/graphics/gstreamer/MediaSampleGStreamer.cpp
>+++ b/Source/WebCore/platform/graphics/gstreamer/MediaSampleGStreamer.cpp
>@@ -29,7 +29,7 @@
> 
> namespace WebCore {
> 
>-MediaSampleGStreamer::MediaSampleGStreamer(GRefPtr<GstSample>&& sample, const FloatSize& presentationSize, const AtomicString& trackId)
>+MediaSampleGStreamer::MediaSampleGStreamer(GRefPtr<GstSample>&& sample, const FloatSize& presentationSize, const AtomString& trackId)
> : m_pts(MediaTime::zeroTime())
> , m_dts(MediaTime::zeroTime())
> , m_duration(MediaTime::zeroTime())
>@@ -76,7 +76,7 @@ MediaSampleGStreamer::MediaSampleGStreamer(GRefPtr<GstSample>&& sample, const Fl
> m_flags = static_cast<MediaSample::SampleFlags>(m_flags | MediaSample::IsNonDisplaying);
> }
> 
>-MediaSampleGStreamer::MediaSampleGStreamer(const FloatSize& presentationSize, const AtomicString& trackId)
>+MediaSampleGStreamer::MediaSampleGStreamer(const FloatSize& presentationSize, const AtomString& trackId)
> : m_pts(MediaTime::zeroTime())
> , m_dts(MediaTime::zeroTime())
> , m_duration(MediaTime::zeroTime())
>@@ -85,7 +85,7 @@ MediaSampleGStreamer::MediaSampleGStreamer(const FloatSize& presentationSize, co
> {
> }
> 
>-Ref<MediaSampleGStreamer> MediaSampleGStreamer::createFakeSample(GstCaps*, MediaTime pts, MediaTime dts, MediaTime duration, const FloatSize& presentationSize, const AtomicString& trackId)
>+Ref<MediaSampleGStreamer> MediaSampleGStreamer::createFakeSample(GstCaps*, MediaTime pts, MediaTime dts, MediaTime duration, const FloatSize& presentationSize, const AtomString& trackId)
> {
> MediaSampleGStreamer* gstreamerMediaSample = new MediaSampleGStreamer(presentationSize, trackId);
> gstreamerMediaSample->m_pts = pts;
>diff --git a/Source/WebCore/platform/graphics/gstreamer/MediaSampleGStreamer.h b/Source/WebCore/platform/graphics/gstreamer/MediaSampleGStreamer.h
>index 2b156e97f2b0f95a8f530009b85f1e2b11dd837b..1df4435a793f8d0b9357b4ec673e3977c6de5d6c 100644
>--- a/Source/WebCore/platform/graphics/gstreamer/MediaSampleGStreamer.h
>+++ b/Source/WebCore/platform/graphics/gstreamer/MediaSampleGStreamer.h
>@@ -25,24 +25,24 @@
> #include "FloatSize.h"
> #include "GStreamerCommon.h"
> #include "MediaSample.h"
>-#include <wtf/text/AtomicString.h>
>+#include <wtf/text/AtomString.h>
> 
> namespace WebCore {
> 
> class MediaSampleGStreamer final : public MediaSample {
> public:
>- static Ref<MediaSampleGStreamer> create(GRefPtr<GstSample>&& sample, const FloatSize& presentationSize, const AtomicString& trackId)
>+ static Ref<MediaSampleGStreamer> create(GRefPtr<GstSample>&& sample, const FloatSize& presentationSize, const AtomString& trackId)
> {
> return adoptRef(*new MediaSampleGStreamer(WTFMove(sample), presentationSize, trackId));
> }
> 
>- static Ref<MediaSampleGStreamer> createFakeSample(GstCaps*, MediaTime pts, MediaTime dts, MediaTime duration, const FloatSize& presentationSize, const AtomicString& trackId);
>+ static Ref<MediaSampleGStreamer> createFakeSample(GstCaps*, MediaTime pts, MediaTime dts, MediaTime duration, const FloatSize& presentationSize, const AtomString& trackId);
> 
> void applyPtsOffset(MediaTime);
> MediaTime presentationTime() const override { return m_pts; }
> MediaTime decodeTime() const override { return m_dts; }
> MediaTime duration() const override { return m_duration; }
>- AtomicString trackID() const override { return m_trackId; }
>+ AtomString trackID() const override { return m_trackId; }
> void setTrackID(const String& trackId) override { m_trackId = trackId; }
> size_t sizeInBytes() const override { return m_size; }
> FloatSize presentationSize() const override { return m_presentationSize; }
>@@ -56,14 +56,14 @@ public:
> void dump(PrintStream&) const override;
> 
> private:
>- MediaSampleGStreamer(GRefPtr<GstSample>&&, const FloatSize& presentationSize, const AtomicString& trackId);
>- MediaSampleGStreamer(const FloatSize& presentationSize, const AtomicString& trackId);
>+ MediaSampleGStreamer(GRefPtr<GstSample>&&, const FloatSize& presentationSize, const AtomString& trackId);
>+ MediaSampleGStreamer(const FloatSize& presentationSize, const AtomString& trackId);
> virtual ~MediaSampleGStreamer() = default;
> 
> MediaTime m_pts;
> MediaTime m_dts;
> MediaTime m_duration;
>- AtomicString m_trackId;
>+ AtomString m_trackId;
> size_t m_size { 0 };
> GRefPtr<GstSample> m_sample;
> FloatSize m_presentationSize;
>diff --git a/Source/WebCore/platform/graphics/gstreamer/TrackPrivateBaseGStreamer.cpp b/Source/WebCore/platform/graphics/gstreamer/TrackPrivateBaseGStreamer.cpp
>index 05ba1e5b12383d127ec0d655377bfaaf6dfd9758..6da49518bda11c470ca0ab47293f09120a4eb967 100644
>--- a/Source/WebCore/platform/graphics/gstreamer/TrackPrivateBaseGStreamer.cpp
>+++ b/Source/WebCore/platform/graphics/gstreamer/TrackPrivateBaseGStreamer.cpp
>@@ -143,7 +143,7 @@ void TrackPrivateBaseGStreamer::notifyTrackOfActiveChanged()
> setActive(active);
> }
> 
>-bool TrackPrivateBaseGStreamer::getLanguageCode(GstTagList* tags, AtomicString& value)
>+bool TrackPrivateBaseGStreamer::getLanguageCode(GstTagList* tags, AtomString& value)
> {
> String language;
> if (getTag(tags, GST_TAG_LANGUAGE_CODE, language)) {
>@@ -185,7 +185,7 @@ void TrackPrivateBaseGStreamer::notifyTrackOfTagsChanged()
> if (getTag(tags.get(), GST_TAG_TITLE, m_label) && client)
> client->labelChanged(m_label);
> 
>- AtomicString language;
>+ AtomString language;
> if (!getLanguageCode(tags.get(), language))
> return;
> 
>diff --git a/Source/WebCore/platform/graphics/gstreamer/TrackPrivateBaseGStreamer.h b/Source/WebCore/platform/graphics/gstreamer/TrackPrivateBaseGStreamer.h
>index e80576d91bd3e8c0370a1130512aa6e050bb89fa..c8cfeb54358510fa1b3c57f919c3748be9e7d466 100644
>--- a/Source/WebCore/platform/graphics/gstreamer/TrackPrivateBaseGStreamer.h
>+++ b/Source/WebCore/platform/graphics/gstreamer/TrackPrivateBaseGStreamer.h
>@@ -80,15 +80,15 @@ protected:
> 
> Ref<MainThreadNotifier<MainThreadNotification>> m_notifier;
> gint m_index;
>- AtomicString m_label;
>- AtomicString m_language;
>+ AtomString m_label;
>+ AtomString m_language;
> GRefPtr<GstPad> m_pad;
> #if GST_CHECK_VERSION(1, 10, 0)
> GRefPtr<GstStream> m_stream;
> #endif
> 
> private:
>- bool getLanguageCode(GstTagList* tags, AtomicString& value);
>+ bool getLanguageCode(GstTagList* tags, AtomString& value);
> 
> template<class StringType>
> bool getTag(GstTagList* tags, const gchar* tagName, StringType& value);
>diff --git a/Source/WebCore/platform/graphics/gstreamer/VideoTrackPrivateGStreamer.h b/Source/WebCore/platform/graphics/gstreamer/VideoTrackPrivateGStreamer.h
>index 74ba71762001d052046d9294ecc5cf1545628703..6e7188b345371bd449cb90ea205f7bd0bf5bc24f 100644
>--- a/Source/WebCore/platform/graphics/gstreamer/VideoTrackPrivateGStreamer.h
>+++ b/Source/WebCore/platform/graphics/gstreamer/VideoTrackPrivateGStreamer.h
>@@ -59,16 +59,16 @@ public:
> 
> int trackIndex() const override { return m_index; }
> 
>- AtomicString id() const override { return m_id; }
>- AtomicString label() const override { return m_label; }
>- AtomicString language() const override { return m_language; }
>+ AtomString id() const override { return m_id; }
>+ AtomString label() const override { return m_label; }
>+ AtomString language() const override { return m_language; }
> 
> private:
> VideoTrackPrivateGStreamer(WeakPtr<MediaPlayerPrivateGStreamer>, gint index, GRefPtr<GstPad>);
> #if GST_CHECK_VERSION(1, 10, 0)
> VideoTrackPrivateGStreamer(WeakPtr<MediaPlayerPrivateGStreamer>, gint index, GRefPtr<GstStream>);
> #endif
>- AtomicString m_id;
>+ AtomString m_id;
> WeakPtr<MediaPlayerPrivateGStreamer> m_player;
> };
> 
>diff --git a/Source/WebCore/platform/graphics/gstreamer/mse/AppendPipeline.cpp b/Source/WebCore/platform/graphics/gstreamer/mse/AppendPipeline.cpp
>index b72dd5c297f32f3cc2287b05d8bbcea05c14f763..7bb1059629b6d92f920e7c9201dc2debc09631dd 100644
>--- a/Source/WebCore/platform/graphics/gstreamer/mse/AppendPipeline.cpp
>+++ b/Source/WebCore/platform/graphics/gstreamer/mse/AppendPipeline.cpp
>@@ -509,12 +509,12 @@ void AppendPipeline::didReceiveInitializationSegment()
> m_sourceBufferPrivate->didReceiveInitializationSegment(initializationSegment);
> }
> 
>-AtomicString AppendPipeline::trackId()
>+AtomString AppendPipeline::trackId()
> {
> ASSERT(isMainThread());
> 
> if (!m_track)
>- return AtomicString();
>+ return AtomString();
> 
> return m_track->id();
> }
>diff --git a/Source/WebCore/platform/graphics/gstreamer/mse/AppendPipeline.h b/Source/WebCore/platform/graphics/gstreamer/mse/AppendPipeline.h
>index 00211a678816b3257cd84d9bbdfd0276f9f0df9d..080d2f756db6c468b61039a57d29914b6d78ac68 100644
>--- a/Source/WebCore/platform/graphics/gstreamer/mse/AppendPipeline.h
>+++ b/Source/WebCore/platform/graphics/gstreamer/mse/AppendPipeline.h
>@@ -73,7 +73,7 @@ private:
> void appsinkNewSample(GRefPtr<GstSample>&&);
> void handleEndOfAppend();
> void didReceiveInitializationSegment();
>- AtomicString trackId();
>+ AtomString trackId();
> 
> GstBus* bus() { return m_bus.get(); }
> GstElement* pipeline() { return m_pipeline.get(); }
>diff --git a/Source/WebCore/platform/graphics/gstreamer/mse/GStreamerMediaDescription.cpp b/Source/WebCore/platform/graphics/gstreamer/mse/GStreamerMediaDescription.cpp
>index 2b766ba3671b2b7a58fde11cccdf0358207c868f..f1ec631a97e3bdb29ba41b4cd5fc66a6110134a0 100644
>--- a/Source/WebCore/platform/graphics/gstreamer/mse/GStreamerMediaDescription.cpp
>+++ b/Source/WebCore/platform/graphics/gstreamer/mse/GStreamerMediaDescription.cpp
>@@ -23,14 +23,14 @@
> #include "GStreamerCommon.h"
> 
> #include <gst/pbutils/pbutils.h>
>-#include <wtf/text/AtomicString.h>
>+#include <wtf/text/AtomString.h>
> #include <wtf/text/WTFString.h>
> 
> #if ENABLE(VIDEO) && USE(GSTREAMER) && ENABLE(MEDIA_SOURCE)
> 
> namespace WebCore {
> 
>-AtomicString GStreamerMediaDescription::codec() const
>+AtomString GStreamerMediaDescription::codec() const
> {
> return m_codecName;
> }
>@@ -51,7 +51,7 @@ bool GStreamerMediaDescription::isText() const
> return false;
> }
> 
>-AtomicString GStreamerMediaDescription::extractCodecName()
>+AtomString GStreamerMediaDescription::extractCodecName()
> {
> GRefPtr<GstCaps> originalCaps = m_caps;
> 
>@@ -60,7 +60,7 @@ AtomicString GStreamerMediaDescription::extractCodecName()
> GstStructure* structure = gst_caps_get_structure(originalCaps.get(), 0);
> 
> if (!gst_structure_has_field(structure, "original-media-type"))
>- return AtomicString();
>+ return AtomString();
> 
> gst_structure_set_name(structure, gst_structure_get_string(structure, "original-media-type"));
> // Remove the DRM related fields from the caps.
>diff --git a/Source/WebCore/platform/graphics/gstreamer/mse/GStreamerMediaDescription.h b/Source/WebCore/platform/graphics/gstreamer/mse/GStreamerMediaDescription.h
>index 85a89aad8248a4b97a540fe66b86322f59cd166c..dfca556a2d3ea3dc245f96a37fc8863342ca1330 100644
>--- a/Source/WebCore/platform/graphics/gstreamer/mse/GStreamerMediaDescription.h
>+++ b/Source/WebCore/platform/graphics/gstreamer/mse/GStreamerMediaDescription.h
>@@ -26,7 +26,7 @@
> #include "MediaDescription.h"
> 
> #include <gst/gst.h>
>-#include <wtf/text/AtomicString.h>
>+#include <wtf/text/AtomString.h>
> 
> namespace WebCore {
> 
>@@ -39,7 +39,7 @@ public:
> 
> virtual ~GStreamerMediaDescription() = default;
> 
>- AtomicString codec() const override;
>+ AtomString codec() const override;
> bool isVideo() const override;
> bool isAudio() const override;
> bool isText() const override;
>@@ -52,9 +52,9 @@ private:
> m_codecName = extractCodecName();
> }
> 
>- AtomicString extractCodecName();
>+ AtomString extractCodecName();
> GRefPtr<GstCaps> m_caps;
>- AtomicString m_codecName;
>+ AtomString m_codecName;
> };
> 
> } // namespace WebCore.
>diff --git a/Source/WebCore/platform/graphics/gstreamer/mse/MediaPlayerPrivateGStreamerMSE.cpp b/Source/WebCore/platform/graphics/gstreamer/mse/MediaPlayerPrivateGStreamerMSE.cpp
>index 7181b382b72ac1f146c283a78244bf71cc8c2895..a88fc8b252a620b361f569be3a8ef313eb32ba74 100644
>--- a/Source/WebCore/platform/graphics/gstreamer/mse/MediaPlayerPrivateGStreamerMSE.cpp
>+++ b/Source/WebCore/platform/graphics/gstreamer/mse/MediaPlayerPrivateGStreamerMSE.cpp
>@@ -52,8 +52,8 @@
> #include <wtf/NeverDestroyed.h>
> #include <wtf/StringPrintStream.h>
> #include <wtf/URL.h>
>-#include <wtf/text/AtomicString.h>
>-#include <wtf/text/AtomicStringHash.h>
>+#include <wtf/text/AtomString.h>
>+#include <wtf/text/AtomStringHash.h>
> 
> static const char* dumpReadyState(WebCore::MediaPlayer::ReadyState readyState)
> {
>diff --git a/Source/WebCore/platform/graphics/gstreamer/mse/MediaSourceClientGStreamerMSE.cpp b/Source/WebCore/platform/graphics/gstreamer/mse/MediaSourceClientGStreamerMSE.cpp
>index 76ffb0d7703063f0b7d622b419a01515e98e3ba0..fae74f4ba4c1791dc65e535feff333f42f06c334 100644
>--- a/Source/WebCore/platform/graphics/gstreamer/mse/MediaSourceClientGStreamerMSE.cpp
>+++ b/Source/WebCore/platform/graphics/gstreamer/mse/MediaSourceClientGStreamerMSE.cpp
>@@ -158,7 +158,7 @@ void MediaSourceClientGStreamerMSE::removedFromMediaSource(RefPtr<SourceBufferPr
> m_playerPrivate.m_playbackPipeline->removeSourceBuffer(sourceBufferPrivate);
> }
> 
>-void MediaSourceClientGStreamerMSE::flush(AtomicString trackId)
>+void MediaSourceClientGStreamerMSE::flush(AtomString trackId)
> {
> ASSERT(WTF::isMainThread());
> 
>@@ -174,7 +174,7 @@ void MediaSourceClientGStreamerMSE::enqueueSample(Ref<MediaSample>&& sample)
> m_playerPrivate.m_playbackPipeline->enqueueSample(WTFMove(sample));
> }
> 
>-void MediaSourceClientGStreamerMSE::allSamplesInTrackEnqueued(const AtomicString& trackId)
>+void MediaSourceClientGStreamerMSE::allSamplesInTrackEnqueued(const AtomString& trackId)
> {
> ASSERT(WTF::isMainThread());
> 
>diff --git a/Source/WebCore/platform/graphics/gstreamer/mse/MediaSourceClientGStreamerMSE.h b/Source/WebCore/platform/graphics/gstreamer/mse/MediaSourceClientGStreamerMSE.h
>index b381e69a1808374c577ce39e2623525fd41f4274..5008a0613accd4061b2fcfde3621a29b4a15b915 100644
>--- a/Source/WebCore/platform/graphics/gstreamer/mse/MediaSourceClientGStreamerMSE.h
>+++ b/Source/WebCore/platform/graphics/gstreamer/mse/MediaSourceClientGStreamerMSE.h
>@@ -50,9 +50,9 @@ public:
> void resetParserState(RefPtr<SourceBufferPrivateGStreamer>);
> void append(RefPtr<SourceBufferPrivateGStreamer>, Vector<unsigned char>&&);
> void removedFromMediaSource(RefPtr<SourceBufferPrivateGStreamer>);
>- void flush(AtomicString);
>+ void flush(AtomString);
> void enqueueSample(Ref<MediaSample>&&);
>- void allSamplesInTrackEnqueued(const AtomicString&);
>+ void allSamplesInTrackEnqueued(const AtomString&);
> 
> const MediaTime& duration();
> GRefPtr<WebKitMediaSrc> webKitMediaSrc();
>diff --git a/Source/WebCore/platform/graphics/gstreamer/mse/PlaybackPipeline.cpp b/Source/WebCore/platform/graphics/gstreamer/mse/PlaybackPipeline.cpp
>index 8ab025ae2d3665acfccb99deb5df47659ad857bd..b005d0d3352664f7f9bed9f70209772ab0027450 100644
>--- a/Source/WebCore/platform/graphics/gstreamer/mse/PlaybackPipeline.cpp
>+++ b/Source/WebCore/platform/graphics/gstreamer/mse/PlaybackPipeline.cpp
>@@ -37,15 +37,15 @@
> #include <wtf/RefCounted.h>
> #include <wtf/glib/GRefPtr.h>
> #include <wtf/glib/GUniquePtr.h>
>-#include <wtf/text/AtomicString.h>
>+#include <wtf/text/AtomString.h>
> 
> GST_DEBUG_CATEGORY_EXTERN(webkit_mse_debug);
> #define GST_CAT_DEFAULT webkit_mse_debug
> 
>-static Stream* getStreamByTrackId(WebKitMediaSrc*, AtomicString);
>+static Stream* getStreamByTrackId(WebKitMediaSrc*, AtomString);
> static Stream* getStreamBySourceBufferPrivate(WebKitMediaSrc*, WebCore::SourceBufferPrivateGStreamer*);
> 
>-static Stream* getStreamByTrackId(WebKitMediaSrc* source, AtomicString trackIdString)
>+static Stream* getStreamByTrackId(WebKitMediaSrc* source, AtomString trackIdString)
> {
> // WebKitMediaSrc should be locked at this point.
> for (Stream* stream : source->priv->streams) {
>@@ -289,7 +289,7 @@ void PlaybackPipeline::markEndOfStream(MediaSourcePrivate::EndOfStreamStatus)
> gst_app_src_end_of_stream(appsrc);
> }
> 
>-void PlaybackPipeline::flush(AtomicString trackId)
>+void PlaybackPipeline::flush(AtomString trackId)
> {
> ASSERT(WTF::isMainThread());
> 
>@@ -337,7 +337,7 @@ void PlaybackPipeline::enqueueSample(Ref<MediaSample>&& mediaSample)
> {
> ASSERT(WTF::isMainThread());
> 
>- AtomicString trackId = mediaSample->trackID();
>+ AtomString trackId = mediaSample->trackID();
> 
> GST_TRACE("enqueing sample trackId=%s PTS=%f presentationSize=%.0fx%.0f at %" GST_TIME_FORMAT " duration: %" GST_TIME_FORMAT,
> trackId.string().utf8().data(), mediaSample->presentationTime().toFloat(),
>@@ -381,7 +381,7 @@ void PlaybackPipeline::enqueueSample(Ref<MediaSample>&& mediaSample)
> }
> }
> 
>-void PlaybackPipeline::allSamplesInTrackEnqueued(const AtomicString& trackId)
>+void PlaybackPipeline::allSamplesInTrackEnqueued(const AtomString& trackId)
> {
> Stream* stream = getStreamByTrackId(m_webKitMediaSrc.get(), trackId);
> gst_app_src_end_of_stream(GST_APP_SRC(stream->appsrc));
>diff --git a/Source/WebCore/platform/graphics/gstreamer/mse/PlaybackPipeline.h b/Source/WebCore/platform/graphics/gstreamer/mse/PlaybackPipeline.h
>index 3d21588bfa868bce279a02fc5f5814ce6cf5b2bb..fc7ca0ead4f1bea11e14c7f47099d5712765536e 100644
>--- a/Source/WebCore/platform/graphics/gstreamer/mse/PlaybackPipeline.h
>+++ b/Source/WebCore/platform/graphics/gstreamer/mse/PlaybackPipeline.h
>@@ -65,9 +65,9 @@ public:
> void markEndOfStream(MediaSourcePrivate::EndOfStreamStatus);
> 
> // From SourceBufferPrivateGStreamer.
>- void flush(AtomicString);
>+ void flush(AtomString);
> void enqueueSample(Ref<MediaSample>&&);
>- void allSamplesInTrackEnqueued(const AtomicString&);
>+ void allSamplesInTrackEnqueued(const AtomString&);
> 
> GstElement* pipeline();
> private:
>diff --git a/Source/WebCore/platform/graphics/gstreamer/mse/SourceBufferPrivateGStreamer.cpp b/Source/WebCore/platform/graphics/gstreamer/mse/SourceBufferPrivateGStreamer.cpp
>index 8fc9ee0203ed4425762288dfc43f9917f63f6f73..7c1e79916d93f8af111dca83ad52c5c4e5c8f7fd 100644
>--- a/Source/WebCore/platform/graphics/gstreamer/mse/SourceBufferPrivateGStreamer.cpp
>+++ b/Source/WebCore/platform/graphics/gstreamer/mse/SourceBufferPrivateGStreamer.cpp
>@@ -104,24 +104,24 @@ void SourceBufferPrivateGStreamer::setReadyState(MediaPlayer::ReadyState state)
> m_mediaSource->setReadyState(state);
> }
> 
>-void SourceBufferPrivateGStreamer::flush(const AtomicString& trackId)
>+void SourceBufferPrivateGStreamer::flush(const AtomString& trackId)
> {
> m_client->flush(trackId);
> }
> 
>-void SourceBufferPrivateGStreamer::enqueueSample(Ref<MediaSample>&& sample, const AtomicString&)
>+void SourceBufferPrivateGStreamer::enqueueSample(Ref<MediaSample>&& sample, const AtomString&)
> {
> m_notifyWhenReadyForMoreSamples = false;
> 
> m_client->enqueueSample(WTFMove(sample));
> }
> 
>-void SourceBufferPrivateGStreamer::allSamplesInTrackEnqueued(const AtomicString& trackId)
>+void SourceBufferPrivateGStreamer::allSamplesInTrackEnqueued(const AtomString& trackId)
> {
> m_client->allSamplesInTrackEnqueued(trackId);
> }
> 
>-bool SourceBufferPrivateGStreamer::isReadyForMoreSamples(const AtomicString&)
>+bool SourceBufferPrivateGStreamer::isReadyForMoreSamples(const AtomString&)
> {
> return m_isReadyForMoreSamples;
> }
>@@ -146,7 +146,7 @@ void SourceBufferPrivateGStreamer::setActive(bool isActive)
> m_mediaSource->sourceBufferPrivateDidChangeActiveState(this, isActive);
> }
> 
>-void SourceBufferPrivateGStreamer::notifyClientWhenReadyForMoreSamples(const AtomicString& trackId)
>+void SourceBufferPrivateGStreamer::notifyClientWhenReadyForMoreSamples(const AtomString& trackId)
> {
> ASSERT(WTF::isMainThread());
> m_notifyWhenReadyForMoreSamples = true;
>diff --git a/Source/WebCore/platform/graphics/gstreamer/mse/SourceBufferPrivateGStreamer.h b/Source/WebCore/platform/graphics/gstreamer/mse/SourceBufferPrivateGStreamer.h
>index ead1ac47ba346df41e1488212874ae96d2642edf..e5fe4068a82a7d22ecf9457fde2b98e117cb90b4 100644
>--- a/Source/WebCore/platform/graphics/gstreamer/mse/SourceBufferPrivateGStreamer.h
>+++ b/Source/WebCore/platform/graphics/gstreamer/mse/SourceBufferPrivateGStreamer.h
>@@ -62,12 +62,12 @@ public:
> MediaPlayer::ReadyState readyState() const final;
> void setReadyState(MediaPlayer::ReadyState) final;
> 
>- void flush(const AtomicString&) final;
>- void enqueueSample(Ref<MediaSample>&&, const AtomicString&) final;
>- void allSamplesInTrackEnqueued(const AtomicString&) final;
>- bool isReadyForMoreSamples(const AtomicString&) final;
>+ void flush(const AtomString&) final;
>+ void enqueueSample(Ref<MediaSample>&&, const AtomString&) final;
>+ void allSamplesInTrackEnqueued(const AtomString&) final;
>+ bool isReadyForMoreSamples(const AtomString&) final;
> void setActive(bool) final;
>- void notifyClientWhenReadyForMoreSamples(const AtomicString&) final;
>+ void notifyClientWhenReadyForMoreSamples(const AtomString&) final;
> 
> void setReadyForMoreSamples(bool);
> void notifyReadyForMoreSamples();
>@@ -89,7 +89,7 @@ private:
> SourceBufferPrivateClient* m_sourceBufferPrivateClient { nullptr };
> bool m_isReadyForMoreSamples = true;
> bool m_notifyWhenReadyForMoreSamples = false;
>- AtomicString m_trackId;
>+ AtomString m_trackId;
> };
> 
> }
>diff --git a/Source/WebCore/platform/graphics/ios/FontCacheIOS.mm b/Source/WebCore/platform/graphics/ios/FontCacheIOS.mm
>index 8fdb8ba1edf42ecd47a8c676e12a2cb6d8320869..8ba3960b387e33dcbe9942c44e6ab52a70fa7537 100644
>--- a/Source/WebCore/platform/graphics/ios/FontCacheIOS.mm
>+++ b/Source/WebCore/platform/graphics/ios/FontCacheIOS.mm
>@@ -52,10 +52,10 @@ FontPlatformData* FontCache::getCustomFallbackFont(const UInt32 c, const FontDes
> {
> ASSERT(requiresCustomFallbackFont(c));
> 
>- static NeverDestroyed<AtomicString> helveticaFamily("Helvetica Neue", AtomicString::ConstructFromLiteral);
>- static NeverDestroyed<AtomicString> timesNewRomanPSMTFamily("TimesNewRomanPSMT", AtomicString::ConstructFromLiteral);
>+ static NeverDestroyed<AtomString> helveticaFamily("Helvetica Neue", AtomString::ConstructFromLiteral);
>+ static NeverDestroyed<AtomString> timesNewRomanPSMTFamily("TimesNewRomanPSMT", AtomString::ConstructFromLiteral);
> 
>- AtomicString* family = nullptr;
>+ AtomString* family = nullptr;
> switch (c) {
> case AppleLogo:
> family = &helveticaFamily.get();
>@@ -128,7 +128,7 @@ static RetainPtr<CTFontDescriptorRef> systemFontDescriptor(FontSelectionValue we
> return adoptCF(CTFontDescriptorCreateCopyWithAttributes(fontDescriptor.get(), static_cast<CFDictionaryRef>(attributes.get())));
> }
> 
>-RetainPtr<CTFontRef> platformFontWithFamilySpecialCase(const AtomicString& family, FontSelectionRequest request, float size, AllowUserInstalledFonts allowUserInstalledFonts)
>+RetainPtr<CTFontRef> platformFontWithFamilySpecialCase(const AtomString& family, FontSelectionRequest request, float size, AllowUserInstalledFonts allowUserInstalledFonts)
> {
> // FIXME: See comment in FontCascadeDescription::effectiveFamilyAt() in FontDescriptionCocoa.cpp
> if (family.startsWith("UICTFontTextStyle")) {
>diff --git a/Source/WebCore/platform/graphics/mac/FontCacheMac.mm b/Source/WebCore/platform/graphics/mac/FontCacheMac.mm
>index 211d899cab7fb5cbb7597085a884d6d1b0c5efca..b3dcdcc7fb5658b4610fd215c37fecce0fe3e08c 100644
>--- a/Source/WebCore/platform/graphics/mac/FontCacheMac.mm
>+++ b/Source/WebCore/platform/graphics/mac/FontCacheMac.mm
>@@ -43,7 +43,7 @@
> #import <wtf/NeverDestroyed.h>
> #import <wtf/StdLibExtras.h>
> #import <wtf/Threading.h>
>-#import <wtf/text/AtomicStringHash.h>
>+#import <wtf/text/AtomStringHash.h>
> #endif
> 
> #import <wtf/SoftLinking.h>
>@@ -73,7 +73,7 @@ static CGFloat toNSFontWeight(FontSelectionValue fontWeight)
> return NSFontWeightBlack;
> }
> 
>-RetainPtr<CTFontRef> platformFontWithFamilySpecialCase(const AtomicString& family, FontSelectionRequest request, float size, AllowUserInstalledFonts allowUserInstalledFonts)
>+RetainPtr<CTFontRef> platformFontWithFamilySpecialCase(const AtomString& family, FontSelectionRequest request, float size, AllowUserInstalledFonts allowUserInstalledFonts)
> {
> // FIXME: See comment in FontCascadeDescription::effectiveFamilyAt() in FontDescriptionCocoa.cpp
> if (equalLettersIgnoringASCIICase(family, "-webkit-system-font") || equalLettersIgnoringASCIICase(family, "-apple-system") || equalLettersIgnoringASCIICase(family, "-apple-system-font") || equalLettersIgnoringASCIICase(family, "system-ui")) {
>diff --git a/Source/WebCore/platform/graphics/texmap/TextureMapperShaderProgram.cpp b/Source/WebCore/platform/graphics/texmap/TextureMapperShaderProgram.cpp
>index e1c97fe42f7db7eb20d0cc13c0442f596cfc19e5..eb8788d4ff5e889fbaf46c6016995300a78d710d 100644
>--- a/Source/WebCore/platform/graphics/texmap/TextureMapperShaderProgram.cpp
>+++ b/Source/WebCore/platform/graphics/texmap/TextureMapperShaderProgram.cpp
>@@ -525,7 +525,7 @@ void TextureMapperShaderProgram::setMatrix(GLuint location, const Transformation
> glUniformMatrix4fv(location, 1, false, floatMatrix.data());
> }
> 
>-GLuint TextureMapperShaderProgram::getLocation(const AtomicString& name, VariableType type)
>+GLuint TextureMapperShaderProgram::getLocation(const AtomString& name, VariableType type)
> {
> auto addResult = m_variables.ensure(name,
> [this, &name, type] {
>diff --git a/Source/WebCore/platform/graphics/texmap/TextureMapperShaderProgram.h b/Source/WebCore/platform/graphics/texmap/TextureMapperShaderProgram.h
>index 8da1e42819e0d174787b37fa0f56f41f21f26ced..4a3420c0602cb4d60a498b9475a3f397d2d71f19 100644
>--- a/Source/WebCore/platform/graphics/texmap/TextureMapperShaderProgram.h
>+++ b/Source/WebCore/platform/graphics/texmap/TextureMapperShaderProgram.h
>@@ -28,13 +28,13 @@
> #include <wtf/HashMap.h>
> #include <wtf/NeverDestroyed.h>
> #include <wtf/Ref.h>
>-#include <wtf/text/AtomicStringHash.h>
>+#include <wtf/text/AtomStringHash.h>
> 
> namespace WebCore {
> 
> #define TEXMAP_DECLARE_VARIABLE(Accessor, Name, Type) \
> GLuint Accessor##Location() { \
>- static NeverDestroyed<const AtomicString> name(Name, AtomicString::ConstructFromLiteral); \
>+ static NeverDestroyed<const AtomString> name(Name, AtomString::ConstructFromLiteral); \
> return getLocation(name.get(), Type); \
> }
> 
>@@ -98,10 +98,10 @@ private:
> GLuint m_fragmentShader;
> 
> enum VariableType { UniformVariable, AttribVariable };
>- GLuint getLocation(const AtomicString&, VariableType);
>+ GLuint getLocation(const AtomString&, VariableType);
> 
> GLuint m_id;
>- HashMap<AtomicString, GLuint> m_variables;
>+ HashMap<AtomString, GLuint> m_variables;
> };
> 
> }
>diff --git a/Source/WebCore/platform/graphics/win/FontCacheWin.cpp b/Source/WebCore/platform/graphics/win/FontCacheWin.cpp
>index 9a85640bdf91079ea340395b8e227201bd91d412..d9723838e3b6050b9a4caa8e97fa6c12cbbdda7f 100644
>--- a/Source/WebCore/platform/graphics/win/FontCacheWin.cpp
>+++ b/Source/WebCore/platform/graphics/win/FontCacheWin.cpp
>@@ -328,9 +328,9 @@ Vector<String> FontCache::systemFontFamilies()
> return fontFamilies;
> }
> 
>-RefPtr FontCache::fontFromDescriptionAndLogFont(const FontDescription& fontDescription, const LOGFONT& font, AtomicString& outFontFamilyName)
>+RefPtr FontCache::fontFromDescriptionAndLogFont(const FontDescription& fontDescription, const LOGFONT& font, AtomString& outFontFamilyName)
> {
>- AtomicString familyName(font.lfFaceName, wcsnlen(font.lfFaceName, LF_FACESIZE));
>+ AtomString familyName(font.lfFaceName, wcsnlen(font.lfFaceName, LF_FACESIZE));
> RefPtr fontData = fontForFamily(fontDescription, familyName);
> if (fontData)
> outFontFamilyName = familyName;
>@@ -339,7 +339,7 @@ RefPtr FontCache::fontFromDescriptionAndLogFont(const FontDescription& fon
> 
> Ref FontCache::lastResortFallbackFont(const FontDescription& fontDescription)
> {
>- static NeverDestroyed<AtomicString> fallbackFontName;
>+ static NeverDestroyed<AtomString> fallbackFontName;
> 
> if (!fallbackFontName.get().isEmpty())
> return *fontForFamily(fontDescription, fallbackFontName);
>@@ -350,12 +350,12 @@ Ref FontCache::lastResortFallbackFont(const FontDescription& fontDescripti
> // Search all typical Windows-installed full Unicode fonts.
> // Sorted by most to least glyphs according to http://en.wikipedia.org/wiki/Unicode_typefaces
> // Start with Times New Roman also since it is the default if the user doesn't change prefs.
>- static NeverDestroyed<AtomicString> fallbackFonts[] = {
>- AtomicString("Times New Roman", AtomicString::ConstructFromLiteral),
>- AtomicString("Microsoft Sans Serif", AtomicString::ConstructFromLiteral),
>- AtomicString("Tahoma", AtomicString::ConstructFromLiteral),
>- AtomicString("Lucida Sans Unicode", AtomicString::ConstructFromLiteral),
>- AtomicString("Arial", AtomicString::ConstructFromLiteral)
>+ static NeverDestroyed<AtomString> fallbackFonts[] = {
>+ AtomString("Times New Roman", AtomString::ConstructFromLiteral),
>+ AtomString("Microsoft Sans Serif", AtomString::ConstructFromLiteral),
>+ AtomString("Tahoma", AtomString::ConstructFromLiteral),
>+ AtomString("Lucida Sans Unicode", AtomString::ConstructFromLiteral),
>+ AtomString("Arial", AtomString::ConstructFromLiteral)
> };
> RefPtr simpleFont;
> for (size_t i = 0; i < WTF_ARRAY_LENGTH(fallbackFonts); ++i) {
>@@ -477,7 +477,7 @@ static int CALLBACK matchImprovingEnumProc(CONST LOGFONT* candidate, CONST TEXTM
> return 1;
> }
> 
>-static GDIObject<HFONT> createGDIFont(const AtomicString& family, LONG desiredWeight, bool desiredItalic, int size, bool synthesizeItalic)
>+static GDIObject<HFONT> createGDIFont(const AtomString& family, LONG desiredWeight, bool desiredItalic, int size, bool synthesizeItalic)
> {
> HWndDC hdc(0);
> 
>@@ -535,12 +535,12 @@ static GDIObject<HFONT> createGDIFont(const AtomicString& family, LONG desiredWe
> }
> 
> struct TraitsInFamilyProcData {
>- TraitsInFamilyProcData(const AtomicString& familyName)
>+ TraitsInFamilyProcData(const AtomString& familyName)
> : m_familyName(familyName)
> {
> }
> 
>- const AtomicString& m_familyName;
>+ const AtomString& m_familyName;
> Vector<FontSelectionCapabilities> m_capabilities;
> };
> 
>@@ -591,7 +591,7 @@ static int CALLBACK traitsInFamilyEnumProc(CONST LOGFONT* logFont, CONST TEXTMET
> return 1;
> }
> 
>-Vector<FontSelectionCapabilities> FontCache::getFontSelectionCapabilitiesInFamily(const AtomicString& familyName, AllowUserInstalledFonts)
>+Vector<FontSelectionCapabilities> FontCache::getFontSelectionCapabilitiesInFamily(const AtomString& familyName, AllowUserInstalledFonts)
> {
> HWndDC hdc(0);
> 
>@@ -611,7 +611,7 @@ Vector<FontSelectionCapabilities> FontCache::getFontSelectionCapabilitiesInFamil
> return result;
> }
> 
>-std::unique_ptr<FontPlatformData> FontCache::createFontPlatformData(const FontDescription& fontDescription, const AtomicString& family, const FontFeatureSettings*, const FontVariantSettings*, FontSelectionSpecifiedCapabilities)
>+std::unique_ptr<FontPlatformData> FontCache::createFontPlatformData(const FontDescription& fontDescription, const AtomString& family, const FontFeatureSettings*, const FontVariantSettings*, FontSelectionSpecifiedCapabilities)
> {
> bool isLucidaGrande = equalLettersIgnoringASCIICase(family, "lucida grande");
> 
>@@ -657,10 +657,10 @@ std::unique_ptr<FontPlatformData> FontCache::createFontPlatformData(const FontDe
> return result;
> }
> 
>-const AtomicString& FontCache::platformAlternateFamilyName(const AtomicString& familyName)
>+const AtomString& FontCache::platformAlternateFamilyName(const AtomString& familyName)
> {
>- static NeverDestroyed<AtomicString> timesNewRoman("Times New Roman", AtomicString::ConstructFromLiteral);
>- static NeverDestroyed<AtomicString> microsoftSansSerif("Microsoft Sans Serif", AtomicString::ConstructFromLiteral);
>+ static NeverDestroyed<AtomString> timesNewRoman("Times New Roman", AtomString::ConstructFromLiteral);
>+ static NeverDestroyed<AtomString> microsoftSansSerif("Microsoft Sans Serif", AtomString::ConstructFromLiteral);
> 
> switch (familyName.length()) {
> // On Windows, we don't support bitmap fonts, but legacy content expects support.
>diff --git a/Source/WebCore/platform/ios/wak/WebCoreThread.mm b/Source/WebCore/platform/ios/wak/WebCoreThread.mm
>index 664736f9506e0f3b5167e1fcfbe95af008129ee9..195408dbd7ad426961dd4c5211165d23cc6ee955 100644
>--- a/Source/WebCore/platform/ios/wak/WebCoreThread.mm
>+++ b/Source/WebCore/platform/ios/wak/WebCoreThread.mm
>@@ -50,7 +50,7 @@
> #import <wtf/ThreadSpecific.h>
> #import <wtf/Threading.h>
> #import <wtf/spi/cocoa/objcSPI.h>
>-#import <wtf/text/AtomicString.h>
>+#import <wtf/text/AtomString.h>
> 
> #define LOG_MESSAGES 0
> #define LOG_WEB_LOCK 0
>@@ -632,11 +632,11 @@ static void StartWebThread()
> {
> webThreadStarted = TRUE;
> 
>- // ThreadGlobalData touches AtomicString, which requires Threading initialization.
>+ // ThreadGlobalData touches AtomString, which requires Threading initialization.
> WTF::initializeThreading();
> 
>- // Initialize AtomicString on the main thread.
>- WTF::AtomicString::init();
>+ // Initialize AtomString on the main thread.
>+ WTF::AtomString::init();
> 
> // Initialize ThreadGlobalData on the main UI thread so that the WebCore thread
> // can later set it's thread-specific data to point to the same objects.
>diff --git a/Source/WebCore/platform/mac/ThemeMac.mm b/Source/WebCore/platform/mac/ThemeMac.mm
>index b4a8162ddb3e947c7f79adf03feeb85503f378e9..272824ec88bbbc10369477ed098ac484413ab9af 100644
>--- a/Source/WebCore/platform/mac/ThemeMac.mm
>+++ b/Source/WebCore/platform/mac/ThemeMac.mm
>@@ -771,7 +771,7 @@ Optional<FontCascadeDescription> ThemeMac::controlFont(ControlPart part, const F
> fontDescription.setIsAbsoluteSize(true);
> 
> NSFont* nsFont = [NSFont systemFontOfSize:[NSFont systemFontSizeForControlSize:controlSizeForFont(font)]];
>- fontDescription.setOneFamily(AtomicString("-apple-system", AtomicString::ConstructFromLiteral));
>+ fontDescription.setOneFamily(AtomString("-apple-system", AtomString::ConstructFromLiteral));
> fontDescription.setComputedSize([nsFont pointSize] * zoomFactor);
> fontDescription.setSpecifiedSize([nsFont pointSize] * zoomFactor);
> return fontDescription;
>diff --git a/Source/WebCore/platform/mediastream/AudioTrackPrivateMediaStream.h b/Source/WebCore/platform/mediastream/AudioTrackPrivateMediaStream.h
>index be47695ac3b2e2a59c3df756cf4b1b82bdaca62a..dcd3aec2549f36ed3eac81b3e049d64249f8b8fb 100644
>--- a/Source/WebCore/platform/mediastream/AudioTrackPrivateMediaStream.h
>+++ b/Source/WebCore/platform/mediastream/AudioTrackPrivateMediaStream.h
>@@ -41,9 +41,9 @@ public:
> }
> 
> Kind kind() const override { return Kind::Main; }
>- AtomicString id() const override { return m_id; }
>- AtomicString label() const override { return m_label; }
>- AtomicString language() const override { return emptyAtom(); }
>+ AtomString id() const override { return m_id; }
>+ AtomString label() const override { return m_label; }
>+ AtomString language() const override { return emptyAtom(); }
> int trackIndex() const override { return m_index; }
> 
> void setTrackIndex(int index) { m_index = index; }
>@@ -63,8 +63,8 @@ protected:
> }
> 
> Ref<MediaStreamTrackPrivate> m_streamTrack;
>- AtomicString m_id;
>- AtomicString m_label;
>+ AtomString m_id;
>+ AtomString m_label;
> int m_index { 0 };
> MediaTime m_timelineOffset;
> };
>diff --git a/Source/WebCore/platform/mediastream/RealtimeMediaSourceCapabilities.h b/Source/WebCore/platform/mediastream/RealtimeMediaSourceCapabilities.h
>index 141ed119ddf7144769f0dccf2a70104b6cf874dc..9c2bf650ae1ef5ce71ffd14421c824eaffc0737b 100644
>--- a/Source/WebCore/platform/mediastream/RealtimeMediaSourceCapabilities.h
>+++ b/Source/WebCore/platform/mediastream/RealtimeMediaSourceCapabilities.h
>@@ -32,7 +32,7 @@
> #include <wtf/NeverDestroyed.h>
> #include <wtf/RefCounted.h>
> #include <wtf/Vector.h>
>-#include <wtf/text/AtomicString.h>
>+#include <wtf/text/AtomString.h>
> 
> namespace WebCore {
> 
>@@ -184,12 +184,12 @@ public:
> void setEchoCancellation(EchoCancellation echoCancellation) { m_echoCancellation = echoCancellation; }
> 
> bool supportsDeviceId() const { return m_supportedConstraints.supportsDeviceId(); }
>- const AtomicString& deviceId() const { return m_deviceId; }
>- void setDeviceId(const AtomicString& id) { m_deviceId = id; }
>+ const AtomString& deviceId() const { return m_deviceId; }
>+ void setDeviceId(const AtomString& id) { m_deviceId = id; }
> 
> bool supportsGroupId() const { return m_supportedConstraints.supportsGroupId(); }
>- const AtomicString& groupId() const { return m_groupId; }
>- void setGroupId(const AtomicString& id) { m_groupId = id; }
>+ const AtomString& groupId() const { return m_groupId; }
>+ void setGroupId(const AtomString& id) { m_groupId = id; }
> 
> const RealtimeMediaSourceSupportedConstraints& supportedConstraints() const { return m_supportedConstraints; }
> void setSupportedConstraints(const RealtimeMediaSourceSupportedConstraints& constraints) { m_supportedConstraints = constraints; }
>@@ -207,8 +207,8 @@ private:
> CapabilityValueOrRange m_sampleRate;
> CapabilityValueOrRange m_sampleSize;
> EchoCancellation m_echoCancellation;
>- AtomicString m_deviceId;
>- AtomicString m_groupId;
>+ AtomString m_deviceId;
>+ AtomString m_groupId;
> 
> RealtimeMediaSourceSupportedConstraints m_supportedConstraints;
> };
>diff --git a/Source/WebCore/platform/mediastream/RealtimeMediaSourceSettings.h b/Source/WebCore/platform/mediastream/RealtimeMediaSourceSettings.h
>index 395a64cbd3cfaee405555f36721ab3c24e301864..f04db454367386e4705d8bd855475f29993ba923 100644
>--- a/Source/WebCore/platform/mediastream/RealtimeMediaSourceSettings.h
>+++ b/Source/WebCore/platform/mediastream/RealtimeMediaSourceSettings.h
>@@ -31,7 +31,7 @@
> #include <wtf/OptionSet.h>
> #include <wtf/RefCounted.h>
> #include <wtf/Vector.h>
>-#include <wtf/text/AtomicString.h>
>+#include <wtf/text/AtomString.h>
> 
> namespace WebCore {
> 
>@@ -102,12 +102,12 @@ public:
> void setEchoCancellation(bool echoCancellation) { m_echoCancellation = echoCancellation; }
> 
> bool supportsDeviceId() const { return m_supportedConstraints.supportsDeviceId(); }
>- const AtomicString& deviceId() const { return m_deviceId; }
>- void setDeviceId(const AtomicString& deviceId) { m_deviceId = deviceId; }
>+ const AtomString& deviceId() const { return m_deviceId; }
>+ void setDeviceId(const AtomString& deviceId) { m_deviceId = deviceId; }
> 
> bool supportsGroupId() const { return m_supportedConstraints.supportsGroupId(); }
>- const AtomicString& groupId() const { return m_groupId; }
>- void setGroupId(const AtomicString& groupId) { m_groupId = groupId; }
>+ const AtomString& groupId() const { return m_groupId; }
>+ void setGroupId(const AtomString& groupId) { m_groupId = groupId; }
> 
> enum class DisplaySurfaceType {
> Monitor,
>@@ -128,8 +128,8 @@ public:
> const RealtimeMediaSourceSupportedConstraints& supportedConstraints() const { return m_supportedConstraints; }
> void setSupportedConstraints(const RealtimeMediaSourceSupportedConstraints& supportedConstraints) { m_supportedConstraints = supportedConstraints; }
> 
>- const AtomicString& label() const { return m_label; }
>- void setLabel(const AtomicString& label) { m_label = label; }
>+ const AtomString& label() const { return m_label; }
>+ void setLabel(const AtomString& label) { m_label = label; }
> 
> template<class Encoder> void encode(Encoder&) const;
> template<class Decoder> static bool decode(Decoder&, RealtimeMediaSourceSettings&);
>@@ -147,9 +147,9 @@ private:
> uint32_t m_sampleSize { 0 };
> bool m_echoCancellation { 0 };
> 
>- AtomicString m_deviceId;
>- AtomicString m_groupId;
>- AtomicString m_label;
>+ AtomString m_deviceId;
>+ AtomString m_groupId;
>+ AtomString m_label;
> 
> DisplaySurfaceType m_displaySurface { DisplaySurfaceType::Invalid };
> bool m_logicalSurface { 0 };
>diff --git a/Source/WebCore/platform/mediastream/RealtimeMediaSourceSupportedConstraints.cpp b/Source/WebCore/platform/mediastream/RealtimeMediaSourceSupportedConstraints.cpp
>index 605d3887cb4c2e306ccff83138de53f30bcd034e..3e61cad37d18f1d5addd100e4918bca8e2d50c95 100644
>--- a/Source/WebCore/platform/mediastream/RealtimeMediaSourceSupportedConstraints.cpp
>+++ b/Source/WebCore/platform/mediastream/RealtimeMediaSourceSupportedConstraints.cpp
>@@ -29,8 +29,8 @@
> #if ENABLE(MEDIA_STREAM)
> 
> #include <wtf/HashMap.h>
>-#include <wtf/text/AtomicString.h>
>-#include <wtf/text/AtomicStringHash.h>
>+#include <wtf/text/AtomString.h>
>+#include <wtf/text/AtomStringHash.h>
> 
> namespace WebCore {
> 
>diff --git a/Source/WebCore/platform/mediastream/VideoTrackPrivateMediaStream.h b/Source/WebCore/platform/mediastream/VideoTrackPrivateMediaStream.h
>index 4b86c1bac9070073751e373a9cf1e33eca6fc366..10631f062e37dd2dc8ee928ef0edf4f555f87b6d 100644
>--- a/Source/WebCore/platform/mediastream/VideoTrackPrivateMediaStream.h
>+++ b/Source/WebCore/platform/mediastream/VideoTrackPrivateMediaStream.h
>@@ -57,14 +57,14 @@ private:
> }
> 
> Kind kind() const final { return Kind::Main; }
>- AtomicString id() const final { return m_id; }
>- AtomicString label() const final { return m_label; }
>- AtomicString language() const final { return emptyAtom(); }
>+ AtomString id() const final { return m_id; }
>+ AtomString label() const final { return m_label; }
>+ AtomString language() const final { return emptyAtom(); }
> int trackIndex() const final { return m_index; }
> 
> Ref<MediaStreamTrackPrivate> m_streamTrack;
>- AtomicString m_id;
>- AtomicString m_label;
>+ AtomString m_id;
>+ AtomString m_label;
> int m_index { 0 };
> MediaTime m_timelineOffset;
> };
>diff --git a/Source/WebCore/platform/mock/mediasource/MockSourceBufferPrivate.cpp b/Source/WebCore/platform/mock/mediasource/MockSourceBufferPrivate.cpp
>index d0f9dce85fe94525adcf8ff9fe9f2a87b24b9c36..b42f04bedf01ed07abe09c53f9b89f610dbfafea 100644
>--- a/Source/WebCore/platform/mock/mediasource/MockSourceBufferPrivate.cpp
>+++ b/Source/WebCore/platform/mock/mediasource/MockSourceBufferPrivate.cpp
>@@ -49,14 +49,14 @@ public:
> private:
> MockMediaSample(const MockSampleBox& box)
> : m_box(box)
>- , m_id(AtomicString::number(box.trackID()))
>+ , m_id(AtomString::number(box.trackID()))
> {
> }
> 
> MediaTime presentationTime() const override { return m_box.presentationTimestamp(); }
> MediaTime decodeTime() const override { return m_box.decodeTimestamp(); }
> MediaTime duration() const override { return m_box.duration(); }
>- AtomicString trackID() const override { return m_id; }
>+ AtomString trackID() const override { return m_id; }
> void setTrackID(const String& id) override { m_id = id; }
> size_t sizeInBytes() const override { return sizeof(m_box); }
> SampleFlags flags() const override;
>@@ -72,7 +72,7 @@ private:
> unsigned generation() const { return m_box.generation(); }
> 
> MockSampleBox m_box;
>- AtomicString m_id;
>+ AtomString m_id;
> };
> 
> MediaSample::SampleFlags MockMediaSample::flags() const
>@@ -108,7 +108,7 @@ public:
> static Ref<MockMediaDescription> create(const MockTrackBox& box) { return adoptRef(*new MockMediaDescription(box)); }
> virtual ~MockMediaDescription() = default;
> 
>- AtomicString codec() const override { return m_box.codec(); }
>+ AtomString codec() const override { return m_box.codec(); }
> bool isVideo() const override { return m_box.kind() == MockTrackBox::Video; }
> bool isAudio() const override { return m_box.kind() == MockTrackBox::Audio; }
> bool isText() const override { return m_box.kind() == MockTrackBox::Text; }
>@@ -235,7 +235,7 @@ void MockSourceBufferPrivate::setActive(bool isActive)
> m_mediaSource->sourceBufferPrivateDidChangeActiveState(this, isActive);
> }
> 
>-Vector<String> MockSourceBufferPrivate::enqueuedSamplesForTrackID(const AtomicString&)
>+Vector<String> MockSourceBufferPrivate::enqueuedSamplesForTrackID(const AtomString&)
> {
> return m_enqueuedSamples;
> }
>@@ -248,7 +248,7 @@ bool MockSourceBufferPrivate::canSwitchToType(const ContentType& contentType)
> return MockMediaPlayerMediaSource::supportsType(parameters) != MediaPlayer::IsNotSupported;
> }
> 
>-void MockSourceBufferPrivate::enqueueSample(Ref<MediaSample>&& sample, const AtomicString&)
>+void MockSourceBufferPrivate::enqueueSample(Ref<MediaSample>&& sample, const AtomString&)
> {
> if (!m_mediaSource)
> return;
>diff --git a/Source/WebCore/platform/mock/mediasource/MockSourceBufferPrivate.h b/Source/WebCore/platform/mock/mediasource/MockSourceBufferPrivate.h
>index f89a80b50d0761c7186fc9cb4c9767f0b768d400..e4b9599de9a96d79091fa2c8650c5efbbfbe316d 100644
>--- a/Source/WebCore/platform/mock/mediasource/MockSourceBufferPrivate.h
>+++ b/Source/WebCore/platform/mock/mediasource/MockSourceBufferPrivate.h
>@@ -64,12 +64,12 @@ private:
> void setReadyState(MediaPlayer::ReadyState) final;
> bool canSwitchToType(const ContentType&) final;
> 
>- void flush(const AtomicString&) final { m_enqueuedSamples.clear(); }
>- void enqueueSample(Ref<MediaSample>&&, const AtomicString&) final;
>- bool isReadyForMoreSamples(const AtomicString&) final { return true; }
>+ void flush(const AtomString&) final { m_enqueuedSamples.clear(); }
>+ void enqueueSample(Ref<MediaSample>&&, const AtomString&) final;
>+ bool isReadyForMoreSamples(const AtomString&) final { return true; }
> void setActive(bool) final;
> 
>- Vector<String> enqueuedSamplesForTrackID(const AtomicString&) final;
>+ Vector<String> enqueuedSamplesForTrackID(const AtomString&) final;
> 
> void didReceiveInitializationSegment(const MockInitializationBox&);
> void didReceiveSample(const MockSampleBox&);
>diff --git a/Source/WebCore/platform/mock/mediasource/MockTracks.h b/Source/WebCore/platform/mock/mediasource/MockTracks.h
>index f4c0092294881a4faef1c0df7520834c69e22023..86e29363da5af0bb3b7e512e16d59622a62456fc 100644
>--- a/Source/WebCore/platform/mock/mediasource/MockTracks.h
>+++ b/Source/WebCore/platform/mock/mediasource/MockTracks.h
>@@ -39,16 +39,16 @@ public:
> static Ref<MockAudioTrackPrivate> create(const MockTrackBox& box) { return adoptRef(*new MockAudioTrackPrivate(box)); }
> virtual ~MockAudioTrackPrivate() = default;
> 
>- virtual AtomicString id() const { return m_id; }
>+ virtual AtomString id() const { return m_id; }
> 
> protected:
> MockAudioTrackPrivate(const MockTrackBox& box)
> : m_box(box)
>- , m_id(AtomicString::number(box.trackID()))
>+ , m_id(AtomString::number(box.trackID()))
> {
> }
> MockTrackBox m_box;
>- AtomicString m_id;
>+ AtomString m_id;
> };
> 
> class MockTextTrackPrivate : public InbandTextTrackPrivate {
>@@ -56,17 +56,17 @@ public:
> static Ref<MockTextTrackPrivate> create(const MockTrackBox& box) { return adoptRef(*new MockTextTrackPrivate(box)); }
> virtual ~MockTextTrackPrivate() = default;
> 
>- virtual AtomicString id() const { return m_id; }
>+ virtual AtomString id() const { return m_id; }
> 
> protected:
> MockTextTrackPrivate(const MockTrackBox& box)
> : InbandTextTrackPrivate(InbandTextTrackPrivate::Generic)
> , m_box(box)
>- , m_id(AtomicString::number(box.trackID()))
>+ , m_id(AtomString::number(box.trackID()))
> {
> }
> MockTrackBox m_box;
>- AtomicString m_id;
>+ AtomString m_id;
> };
> 
> 
>@@ -75,16 +75,16 @@ public:
> static Ref<MockVideoTrackPrivate> create(const MockTrackBox& box) { return adoptRef(*new MockVideoTrackPrivate(box)); }
> virtual ~MockVideoTrackPrivate() = default;
> 
>- virtual AtomicString id() const { return m_id; }
>+ virtual AtomString id() const { return m_id; }
> 
> protected:
> MockVideoTrackPrivate(const MockTrackBox& box)
> : m_box(box)
>- , m_id(AtomicString::number(box.trackID()))
>+ , m_id(AtomString::number(box.trackID()))
> {
> }
> MockTrackBox m_box;
>- AtomicString m_id;
>+ AtomString m_id;
> };
> 
> }
>diff --git a/Source/WebCore/platform/network/HTTPParsers.cpp b/Source/WebCore/platform/network/HTTPParsers.cpp
>index 474a1a2e0c54a3a75e1e6b4bfc744c0282bca10f..58a55c0fa9e6738b4e6c9587222c0dc2d9a5f6fd 100644
>--- a/Source/WebCore/platform/network/HTTPParsers.cpp
>+++ b/Source/WebCore/platform/network/HTTPParsers.cpp
>@@ -485,7 +485,7 @@ ContentTypeOptionsDisposition parseContentTypeOptionsHeader(StringView header)
> 
> // For example: "HTTP/1.1 200 OK" => "OK".
> // Note that HTTP/2 does not include a reason phrase, so we return the empty atom.
>-AtomicString extractReasonPhraseFromHTTPStatusLine(const String& statusLine)
>+AtomString extractReasonPhraseFromHTTPStatusLine(const String& statusLine)
> {
> StringView view = statusLine;
> size_t spacePos = view.find(' ');
>@@ -495,7 +495,7 @@ AtomicString extractReasonPhraseFromHTTPStatusLine(const String& statusLine)
> if (spacePos == notFound)
> return emptyAtom();
> 
>- return view.substring(spacePos + 1).toAtomicString();
>+ return view.substring(spacePos + 1).toAtomString();
> }
> 
> XFrameOptionsDisposition parseXFrameOptionsHeader(const String& header)
>diff --git a/Source/WebCore/platform/network/HTTPParsers.h b/Source/WebCore/platform/network/HTTPParsers.h
>index b7ee045bce3115c88ab7f80309f93dbd90304605..e3e192705c71fe2b2ef10770ddd125606fc3df9d 100644
>--- a/Source/WebCore/platform/network/HTTPParsers.h
>+++ b/Source/WebCore/platform/network/HTTPParsers.h
>@@ -80,7 +80,7 @@ String extractMIMETypeFromMediaType(const String&);
> String extractCharsetFromMediaType(const String&);
> void findCharsetInMediaType(const String& mediaType, unsigned int& charsetPos, unsigned int& charsetLen, unsigned int start = 0);
> XSSProtectionDisposition parseXSSProtectionHeader(const String& header, String& failureReason, unsigned& failurePosition, String& reportURL);
>-AtomicString extractReasonPhraseFromHTTPStatusLine(const String&);
>+AtomString extractReasonPhraseFromHTTPStatusLine(const String&);
> WEBCORE_EXPORT XFrameOptionsDisposition parseXFrameOptionsHeader(const String&);
> 
> // -1 could be set to one of the return parameters to indicate the value is not specified.
>diff --git a/Source/WebCore/platform/network/ResourceHandle.cpp b/Source/WebCore/platform/network/ResourceHandle.cpp
>index 70ee4e7711fd748b68f7d9a0f2aa36bb03dc35b0..30c27f576a177e6b6ab194740a7d9025b659fcad 100644
>--- a/Source/WebCore/platform/network/ResourceHandle.cpp
>+++ b/Source/WebCore/platform/network/ResourceHandle.cpp
>@@ -36,14 +36,14 @@
> #include <wtf/CompletionHandler.h>
> #include <wtf/MainThread.h>
> #include <wtf/NeverDestroyed.h>
>-#include <wtf/text/AtomicStringHash.h>
>+#include <wtf/text/AtomStringHash.h>
> #include <wtf/text/CString.h>
> 
> namespace WebCore {
> 
> static bool shouldForceContentSniffing;
> 
>-typedef HashMap<AtomicString, ResourceHandle::BuiltinConstructor> BuiltinResourceHandleConstructorMap;
>+typedef HashMap<AtomString, ResourceHandle::BuiltinConstructor> BuiltinResourceHandleConstructorMap;
> static BuiltinResourceHandleConstructorMap& builtinResourceHandleConstructorMap()
> {
> #if PLATFORM(IOS_FAMILY)
>@@ -55,12 +55,12 @@ static BuiltinResourceHandleConstructorMap& builtinResourceHandleConstructorMap(
> return map;
> }
> 
>-void ResourceHandle::registerBuiltinConstructor(const AtomicString& protocol, ResourceHandle::BuiltinConstructor constructor)
>+void ResourceHandle::registerBuiltinConstructor(const AtomString& protocol, ResourceHandle::BuiltinConstructor constructor)
> {
> builtinResourceHandleConstructorMap().add(protocol, constructor);
> }
> 
>-typedef HashMap<AtomicString, ResourceHandle::BuiltinSynchronousLoader> BuiltinResourceHandleSynchronousLoaderMap;
>+typedef HashMap<AtomString, ResourceHandle::BuiltinSynchronousLoader> BuiltinResourceHandleSynchronousLoaderMap;
> static BuiltinResourceHandleSynchronousLoaderMap& builtinResourceHandleSynchronousLoaderMap()
> {
> ASSERT(isMainThread());
>@@ -68,7 +68,7 @@ static BuiltinResourceHandleSynchronousLoaderMap& builtinResourceHandleSynchrono
> return map;
> }
> 
>-void ResourceHandle::registerBuiltinSynchronousLoader(const AtomicString& protocol, ResourceHandle::BuiltinSynchronousLoader loader)
>+void ResourceHandle::registerBuiltinSynchronousLoader(const AtomString& protocol, ResourceHandle::BuiltinSynchronousLoader loader)
> {
> builtinResourceHandleSynchronousLoaderMap().add(protocol, loader);
> }
>diff --git a/Source/WebCore/platform/network/ResourceHandle.h b/Source/WebCore/platform/network/ResourceHandle.h
>index 9e25d9e2b4496ed16c9a93d2bb87252f19be4ad0..983024ff5d867415c4083cc7b8fbf573885bcd74 100644
>--- a/Source/WebCore/platform/network/ResourceHandle.h
>+++ b/Source/WebCore/platform/network/ResourceHandle.h
>@@ -30,7 +30,7 @@
> #include <wtf/MonotonicTime.h>
> #include <wtf/RefCounted.h>
> #include <wtf/RefPtr.h>
>-#include <wtf/text/AtomicString.h>
>+#include <wtf/text/AtomString.h>
> 
> #if PLATFORM(COCOA) || USE(CFURLCONNECTION)
> #include <wtf/RetainPtr.h>
>@@ -204,10 +204,10 @@ public:
> #endif
> 
> typedef Ref<ResourceHandle> (*BuiltinConstructor)(const ResourceRequest& request, ResourceHandleClient* client);
>- static void registerBuiltinConstructor(const AtomicString& protocol, BuiltinConstructor);
>+ static void registerBuiltinConstructor(const AtomString& protocol, BuiltinConstructor);
> 
> typedef void (*BuiltinSynchronousLoader)(NetworkingContext*, const ResourceRequest&, StoredCredentialsPolicy, ResourceError&, ResourceResponse&, Vector<char>& data);
>- static void registerBuiltinSynchronousLoader(const AtomicString& protocol, BuiltinSynchronousLoader);
>+ static void registerBuiltinSynchronousLoader(const AtomString& protocol, BuiltinSynchronousLoader);
> 
> protected:
> ResourceHandle(NetworkingContext*, const ResourceRequest&, ResourceHandleClient*, bool defersLoading, bool shouldContentSniff, bool shouldContentEncodingSniff);
>diff --git a/Source/WebCore/platform/network/ResourceResponseBase.h b/Source/WebCore/platform/network/ResourceResponseBase.h
>index ce75e9c814bda0b7f46bafa2e59d2378f30a77bf..9f1b3b2e7fc67935bf788d4977190dee5305855d 100644
>--- a/Source/WebCore/platform/network/ResourceResponseBase.h
>+++ b/Source/WebCore/platform/network/ResourceResponseBase.h
>@@ -206,11 +206,11 @@ private:
> 
> protected:
> URL m_url;
>- AtomicString m_mimeType;
>+ AtomString m_mimeType;
> long long m_expectedContentLength { 0 };
>- AtomicString m_textEncodingName;
>- AtomicString m_httpStatusText;
>- AtomicString m_httpVersion;
>+ AtomString m_textEncodingName;
>+ AtomString m_httpStatusText;
>+ AtomString m_httpVersion;
> HTTPHeaderMap m_httpHeaderFields;
> mutable NetworkLoadMetrics m_networkLoadMetrics;
> 
>diff --git a/Source/WebCore/platform/network/cocoa/ResourceResponseCocoa.mm b/Source/WebCore/platform/network/cocoa/ResourceResponseCocoa.mm
>index 3241c66b1bb2e003878fc454d710fd1132cf16d2..5ef9ab9f32ec892088e2b07b5745f06c21881ae3 100644
>--- a/Source/WebCore/platform/network/cocoa/ResourceResponseCocoa.mm
>+++ b/Source/WebCore/platform/network/cocoa/ResourceResponseCocoa.mm
>@@ -124,13 +124,13 @@ static void addToHTTPHeaderMap(const void* key, const void* value, void* context
> httpHeaderMap->set((CFStringRef)key, (CFStringRef)value);
> }
> 
>-static inline AtomicString stripLeadingAndTrailingDoubleQuote(const String& value)
>+static inline AtomString stripLeadingAndTrailingDoubleQuote(const String& value)
> {
> unsigned length = value.length();
> if (length < 2 || value[0u] != '"' || value[length - 1] != '"')
> return value;
> 
>- return StringView(value).substring(1, length - 2).toAtomicString();
>+ return StringView(value).substring(1, length - 2).toAtomString();
> }
> 
> static inline HTTPHeaderMap initializeHTTPHeaders(CFHTTPMessageRef messageRef)
>@@ -143,12 +143,12 @@ static inline HTTPHeaderMap initializeHTTPHeaders(CFHTTPMessageRef messageRef)
> return headersMap;
> }
> 
>-static inline AtomicString extractHTTPStatusText(CFHTTPMessageRef messageRef)
>+static inline AtomString extractHTTPStatusText(CFHTTPMessageRef messageRef)
> {
> if (auto httpStatusLine = adoptCF(CFHTTPMessageCopyResponseStatusLine(messageRef)))
> return extractReasonPhraseFromHTTPStatusLine(httpStatusLine.get());
> 
>- static NeverDestroyed<AtomicString> defaultStatusText("OK", AtomicString::ConstructFromLiteral);
>+ static NeverDestroyed<AtomString> defaultStatusText("OK", AtomString::ConstructFromLiteral);
> return defaultStatusText;
> }
> 
>diff --git a/Source/WebCore/platform/network/soup/ResourceResponseSoup.cpp b/Source/WebCore/platform/network/soup/ResourceResponseSoup.cpp
>index 03b350db3a178863a5eaacae511c170f4676c7ef..bcb490ede320e38e13a4c2f51d240c0ec63c261f 100644
>--- a/Source/WebCore/platform/network/soup/ResourceResponseSoup.cpp
>+++ b/Source/WebCore/platform/network/soup/ResourceResponseSoup.cpp
>@@ -45,10 +45,10 @@ void ResourceResponse::updateFromSoupMessage(SoupMessage* soupMessage)
> 
> switch (soup_message_get_http_version(soupMessage)) {
> case SOUP_HTTP_1_0:
>- m_httpVersion = AtomicString("HTTP/1.0", AtomicString::ConstructFromLiteral);
>+ m_httpVersion = AtomString("HTTP/1.0", AtomString::ConstructFromLiteral);
> break;
> case SOUP_HTTP_1_1:
>- m_httpVersion = AtomicString("HTTP/1.1", AtomicString::ConstructFromLiteral);
>+ m_httpVersion = AtomString("HTTP/1.1", AtomString::ConstructFromLiteral);
> break;
> }
> m_httpStatusCode = soupMessage->status_code;
>diff --git a/Source/WebCore/platform/text/Hyphenation.cpp b/Source/WebCore/platform/text/Hyphenation.cpp
>index ec07637e14dce2f246f28d16c606f0dc60a4cab8..30ed7b06c2c7bf6a85e245a3acf4573189395b1d 100644
>--- a/Source/WebCore/platform/text/Hyphenation.cpp
>+++ b/Source/WebCore/platform/text/Hyphenation.cpp
>@@ -33,12 +33,12 @@
> 
> namespace WebCore {
> 
>-bool canHyphenate(const AtomicString& /* localeIdentifier */)
>+bool canHyphenate(const AtomString& /* localeIdentifier */)
> {
> return false;
> }
> 
>-size_t lastHyphenLocation(StringView, size_t /* beforeIndex */, const AtomicString& /* localeIdentifier */)
>+size_t lastHyphenLocation(StringView, size_t /* beforeIndex */, const AtomString& /* localeIdentifier */)
> {
> ASSERT_NOT_REACHED();
> return 0;
>diff --git a/Source/WebCore/platform/text/Hyphenation.h b/Source/WebCore/platform/text/Hyphenation.h
>index 27f4305914ad452bd9d7f790779e9595aab5642a..45d1e59a94e3d2232e1b78bf7cff64d0614449e7 100644
>--- a/Source/WebCore/platform/text/Hyphenation.h
>+++ b/Source/WebCore/platform/text/Hyphenation.h
>@@ -38,8 +38,8 @@ inline static bool enoughWidthForHyphenation(float availableWidth, float fontPix
> return availableWidth > fontPixelSize * 5 / 4;
> 
> }
>-bool canHyphenate(const AtomicString& localeIdentifier);
>-size_t lastHyphenLocation(StringView, size_t beforeIndex, const AtomicString& localeIdentifier);
>+bool canHyphenate(const AtomString& localeIdentifier);
>+size_t lastHyphenLocation(StringView, size_t beforeIndex, const AtomString& localeIdentifier);
> 
> } // namespace WebCore
> 
>diff --git a/Source/WebCore/platform/text/LocaleICU.cpp b/Source/WebCore/platform/text/LocaleICU.cpp
>index 11684b8066c9eb509b4add4618b7388fb55ac1e5..59e1fc72a2bf296945a86f8552b86376a9ea586d 100644
>--- a/Source/WebCore/platform/text/LocaleICU.cpp
>+++ b/Source/WebCore/platform/text/LocaleICU.cpp
>@@ -42,7 +42,7 @@
> namespace WebCore {
> using namespace icu;
> 
>-std::unique_ptr<Locale> Locale::create(const AtomicString& locale)
>+std::unique_ptr<Locale> Locale::create(const AtomString& locale)
> {
> return std::make_unique<LocaleICU>(locale.string().utf8().data());
> }
>diff --git a/Source/WebCore/platform/text/LocaleNone.cpp b/Source/WebCore/platform/text/LocaleNone.cpp
>index 7693ed9af242a17acd84b8472f79a1a487f9a6b1..bb6b26ba59cb36b989b7e6f58630c7a7b3b56ea7 100644
>--- a/Source/WebCore/platform/text/LocaleNone.cpp
>+++ b/Source/WebCore/platform/text/LocaleNone.cpp
>@@ -55,7 +55,7 @@ private:
> #endif
> };
> 
>-std::unique_ptr<Locale> Locale::create(const AtomicString&)
>+std::unique_ptr<Locale> Locale::create(const AtomString&)
> {
> return std::make_unique<LocaleNone>();
> }
>diff --git a/Source/WebCore/platform/text/PlatformLocale.h b/Source/WebCore/platform/text/PlatformLocale.h
>index e6f5eb74c1d6e55f33713ef2c2d3be89277918d2..a369ea314a875ba651ac11c2b67cac3bd576d9c3 100644
>--- a/Source/WebCore/platform/text/PlatformLocale.h
>+++ b/Source/WebCore/platform/text/PlatformLocale.h
>@@ -40,7 +40,7 @@ class Locale {
> WTF_MAKE_NONCOPYABLE(Locale); WTF_MAKE_FAST_ALLOCATED;
> 
> public:
>- static std::unique_ptr<Locale> create(const AtomicString& localeIdentifier);
>+ static std::unique_ptr<Locale> create(const AtomString& localeIdentifier);
> static std::unique_ptr<Locale> createDefault();
> 
> // Converts the specified number string to another number string localized
>diff --git a/Source/WebCore/platform/text/cf/HyphenationCF.cpp b/Source/WebCore/platform/text/cf/HyphenationCF.cpp
>index 1c70c413d8cc225004b17d7b2a669a737057f36d..3d02f28f685d43784d394695fcbe24f9e762918a 100644
>--- a/Source/WebCore/platform/text/cf/HyphenationCF.cpp
>+++ b/Source/WebCore/platform/text/cf/HyphenationCF.cpp
>@@ -35,16 +35,16 @@
> namespace WTF {
> 
> template<>
>-class TinyLRUCachePolicy<AtomicString, RetainPtr<CFLocaleRef>>
>+class TinyLRUCachePolicy<AtomString, RetainPtr<CFLocaleRef>>
> {
> public:
>- static TinyLRUCache<AtomicString, RetainPtr<CFLocaleRef>>& cache()
>+ static TinyLRUCache<AtomString, RetainPtr<CFLocaleRef>>& cache()
> {
>- static NeverDestroyed<TinyLRUCache<AtomicString, RetainPtr<CFLocaleRef>>> cache;
>+ static NeverDestroyed<TinyLRUCache<AtomString, RetainPtr<CFLocaleRef>>> cache;
> return cache;
> }
> 
>- static bool isKeyNull(const AtomicString& localeIdentifier)
>+ static bool isKeyNull(const AtomString& localeIdentifier)
> {
> return localeIdentifier.isNull();
> }
>@@ -57,7 +57,7 @@ public:
> return CFStringIsHyphenationAvailableForLocale(locale.get()) ? locale : nullptr;
> }
> 
>- static RetainPtr<CFLocaleRef> createValueForKey(const AtomicString& localeIdentifier)
>+ static RetainPtr<CFLocaleRef> createValueForKey(const AtomString& localeIdentifier)
> {
> RetainPtr<CFLocaleRef> locale = adoptCF(CFLocaleCreate(kCFAllocatorDefault, localeIdentifier.string().createCFString().get()));
> 
>@@ -68,14 +68,14 @@ public:
> 
> namespace WebCore {
> 
>-bool canHyphenate(const AtomicString& localeIdentifier)
>+bool canHyphenate(const AtomString& localeIdentifier)
> {
>- return TinyLRUCachePolicy<AtomicString, RetainPtr<CFLocaleRef>>::cache().get(localeIdentifier);
>+ return TinyLRUCachePolicy<AtomString, RetainPtr<CFLocaleRef>>::cache().get(localeIdentifier);
> }
> 
>-size_t lastHyphenLocation(StringView text, size_t beforeIndex, const AtomicString& localeIdentifier)
>+size_t lastHyphenLocation(StringView text, size_t beforeIndex, const AtomString& localeIdentifier)
> {
>- RetainPtr<CFLocaleRef> locale = TinyLRUCachePolicy<AtomicString, RetainPtr<CFLocaleRef>>::cache().get(localeIdentifier);
>+ RetainPtr<CFLocaleRef> locale = TinyLRUCachePolicy<AtomString, RetainPtr<CFLocaleRef>>::cache().get(localeIdentifier);
> 
> CFOptionFlags searchAcrossWordBoundaries = 1;
> CFIndex result = CFStringGetHyphenationLocationBeforeIndex(text.createCFStringWithoutCopying().get(), beforeIndex, CFRangeMake(0, text.length()), searchAcrossWordBoundaries, locale.get(), nullptr);
>diff --git a/Source/WebCore/platform/text/hyphen/HyphenationLibHyphen.cpp b/Source/WebCore/platform/text/hyphen/HyphenationLibHyphen.cpp
>index 5eeb9bfa7400f7215c026c552d82aa38a763f942..fe40fb259b93f9d34e56f23cd1dd1103c65cc9a8 100644
>--- a/Source/WebCore/platform/text/hyphen/HyphenationLibHyphen.cpp
>+++ b/Source/WebCore/platform/text/hyphen/HyphenationLibHyphen.cpp
>@@ -38,7 +38,7 @@
> #include <wtf/TinyLRUCache.h>
> #include <wtf/glib/GLibUtilities.h>
> #include <wtf/glib/GUniquePtr.h>
>-#include <wtf/text/AtomicStringHash.h>
>+#include <wtf/text/AtomStringHash.h>
> #include <wtf/text/CString.h>
> #include <wtf/text/StringView.h>
> 
>@@ -59,7 +59,7 @@ static String extractLocaleFromDictionaryFilePath(const String& filePath)
> return fileName.substring(prefixLength, fileName.length() - prefixLength - suffixLength);
> }
> 
>-static void scanDirectoryForDictionaries(const char* directoryPath, HashMap<AtomicString, Vector<String>>& availableLocales)
>+static void scanDirectoryForDictionaries(const char* directoryPath, HashMap<AtomString, Vector<String>>& availableLocales)
> {
> for (auto& filePath : FileSystem::listDirectory(directoryPath, "hyph_*.dic")) {
> String locale = extractLocaleFromDictionaryFilePath(filePath).convertToASCIILowercase();
>@@ -109,7 +109,7 @@ static CString webkitBuildDirectory()
> return outputDir.get();
> }
> 
>-static void scanTestDictionariesDirectoryIfNecessary(HashMap<AtomicString, Vector<String>>& availableLocales)
>+static void scanTestDictionariesDirectoryIfNecessary(HashMap<AtomString, Vector<String>>& availableLocales)
> {
> // It's unfortunate that we need to look for the dictionaries this way, but
> // libhyphen doesn't have the concept of installed dictionaries. Instead,
>@@ -133,10 +133,10 @@ static void scanTestDictionariesDirectoryIfNecessary(HashMap<AtomicString, Vecto
> }
> #endif
> 
>-static HashMap<AtomicString, Vector<String>>& availableLocales()
>+static HashMap<AtomString, Vector<String>>& availableLocales()
> {
> static bool scannedLocales = false;
>- static HashMap<AtomicString, Vector<String>> availableLocales;
>+ static HashMap<AtomString, Vector<String>> availableLocales;
> 
> if (!scannedLocales) {
> for (size_t i = 0; i < WTF_ARRAY_LENGTH(gDictionaryDirectories); i++)
>@@ -152,13 +152,13 @@ static HashMap<AtomicString, Vector<String>>& availableLocales()
> return availableLocales;
> }
> 
>-bool canHyphenate(const AtomicString& localeIdentifier)
>+bool canHyphenate(const AtomString& localeIdentifier)
> {
> if (localeIdentifier.isNull())
> return false;
> if (availableLocales().contains(localeIdentifier))
> return true;
>- return availableLocales().contains(AtomicString(localeIdentifier.string().convertToASCIILowercase()));
>+ return availableLocales().contains(AtomString(localeIdentifier.string().convertToASCIILowercase()));
> }
> 
> class HyphenationDictionary : public RefCounted<HyphenationDictionary> {
>@@ -203,16 +203,16 @@ private:
> namespace WTF {
> 
> template<>
>-class TinyLRUCachePolicy<AtomicString, RefPtr<WebCore::HyphenationDictionary>>
>+class TinyLRUCachePolicy<AtomString, RefPtr<WebCore::HyphenationDictionary>>
> {
> public:
>- static TinyLRUCache<AtomicString, RefPtr<WebCore::HyphenationDictionary>, 32>& cache()
>+ static TinyLRUCache<AtomString, RefPtr<WebCore::HyphenationDictionary>, 32>& cache()
> {
>- static NeverDestroyed<TinyLRUCache<AtomicString, RefPtr<WebCore::HyphenationDictionary>, 32>> cache;
>+ static NeverDestroyed<TinyLRUCache<AtomString, RefPtr<WebCore::HyphenationDictionary>, 32>> cache;
> return cache;
> }
> 
>- static bool isKeyNull(const AtomicString& localeIdentifier)
>+ static bool isKeyNull(const AtomString& localeIdentifier)
> {
> return localeIdentifier.isNull();
> }
>@@ -222,7 +222,7 @@ public:
> return WebCore::HyphenationDictionary::createNull();
> }
> 
>- static RefPtr<WebCore::HyphenationDictionary> createValueForKey(const AtomicString& dictionaryPath)
>+ static RefPtr<WebCore::HyphenationDictionary> createValueForKey(const AtomString& dictionaryPath)
> {
> return WebCore::HyphenationDictionary::create(FileSystem::fileSystemRepresentation(dictionaryPath.string()));
> }
>@@ -250,7 +250,7 @@ static void countLeadingSpaces(const CString& utf8String, int32_t& pointerOffset
> }
> }
> 
>-size_t lastHyphenLocation(StringView string, size_t beforeIndex, const AtomicString& localeIdentifier)
>+size_t lastHyphenLocation(StringView string, size_t beforeIndex, const AtomString& localeIdentifier)
> {
> // libhyphen accepts strings in UTF-8 format, but WebCore can only provide StringView
> // which stores either UTF-16 or Latin1 data. This is unfortunate for performance
>@@ -270,14 +270,14 @@ size_t lastHyphenLocation(StringView string, size_t beforeIndex, const AtomicStr
> Vector<char> hyphenArray(utf8StringCopy.length() - leadingSpaceBytes + 5);
> char* hyphenArrayData = hyphenArray.data();
> 
>- String lowercaseLocaleIdentifier = AtomicString(localeIdentifier.string().convertToASCIILowercase());
>+ String lowercaseLocaleIdentifier = AtomString(localeIdentifier.string().convertToASCIILowercase());
> 
> // Web content may specify strings for locales which do not exist or that we do not have.
> if (!availableLocales().contains(lowercaseLocaleIdentifier))
> return 0;
> 
> for (const auto& dictionaryPath : availableLocales().get(lowercaseLocaleIdentifier)) {
>- RefPtr<HyphenationDictionary> dictionary = WTF::TinyLRUCachePolicy<AtomicString, RefPtr<HyphenationDictionary>>::cache().get(AtomicString(dictionaryPath));
>+ RefPtr<HyphenationDictionary> dictionary = WTF::TinyLRUCachePolicy<AtomString, RefPtr<HyphenationDictionary>>::cache().get(AtomString(dictionaryPath));
> 
> char** replacements = nullptr;
> int* positions = nullptr;
>diff --git a/Source/WebCore/platform/text/mac/LocaleMac.mm b/Source/WebCore/platform/text/mac/LocaleMac.mm
>index ef5537ad6f8073ca46d453ffa7e73095e14f338e..a517be341f6ac4be8e893cfad7c228845d6a8280 100644
>--- a/Source/WebCore/platform/text/mac/LocaleMac.mm
>+++ b/Source/WebCore/platform/text/mac/LocaleMac.mm
>@@ -65,7 +65,7 @@ static RetainPtr<NSLocale> determineLocale(const String& locale)
> return adoptNS([[NSLocale alloc] initWithLocaleIdentifier:locale]);
> }
> 
>-std::unique_ptr<Locale> Locale::create(const AtomicString& locale)
>+std::unique_ptr<Locale> Locale::create(const AtomString& locale)
> {
> return std::make_unique<LocaleMac>(determineLocale(locale.string()).get());
> }
>diff --git a/Source/WebCore/platform/text/win/LocaleWin.cpp b/Source/WebCore/platform/text/win/LocaleWin.cpp
>index a61aa8c53682afdd2e41006357d6dcff420c1adb..6a160deccfc926aef37de23e97f62e8f5c67906a 100644
>--- a/Source/WebCore/platform/text/win/LocaleWin.cpp
>+++ b/Source/WebCore/platform/text/win/LocaleWin.cpp
>@@ -62,7 +62,7 @@ static LCID LCIDFromLocaleInternal(LCID userDefaultLCID, const String& userDefau
> return LocaleNameToLCID(locale.wideCharacters().data(), 0);
> }
> 
>-static LCID LCIDFromLocale(const AtomicString& locale)
>+static LCID LCIDFromLocale(const AtomString& locale)
> {
> // According to MSDN, 9 is enough for LOCALE_SISO639LANGNAME.
> const size_t languageCodeBufferSize = 9;
>@@ -76,7 +76,7 @@ static LCID LCIDFromLocale(const AtomicString& locale)
> return lcid;
> }
> 
>-std::unique_ptr<Locale> Locale::create(const AtomicString& locale)
>+std::unique_ptr<Locale> Locale::create(const AtomString& locale)
> {
> return std::make_unique<LocaleWin>(LCIDFromLocale(locale));
> }
>diff --git a/Source/WebCore/platform/win/BString.cpp b/Source/WebCore/platform/win/BString.cpp
>index 027cddd32a7d57a308b42b8883d2b5b3941068a3..db8a1a1211a413425f611f1ebf7b74027b1729da 100644
>--- a/Source/WebCore/platform/win/BString.cpp
>+++ b/Source/WebCore/platform/win/BString.cpp
>@@ -28,7 +28,7 @@
> 
> #include <windows.h>
> #include <wtf/URL.h>
>-#include <wtf/text/AtomicString.h>
>+#include <wtf/text/AtomString.h>
> #include <wtf/text/StringView.h>
> #include <wtf/text/win/WCharStringExtras.h>
> 
>@@ -77,7 +77,7 @@ BString::BString(const URL& url)
> m_bstr = SysAllocStringLen(wcharFrom(StringView(url.string()).upconvertedCharacters()), url.string().length());
> }
> 
>-BString::BString(const AtomicString& s)
>+BString::BString(const AtomString& s)
> {
> if (s.isNull())
> m_bstr = 0;
>diff --git a/Source/WebCore/platform/win/BString.h b/Source/WebCore/platform/win/BString.h
>index 184b551d48e9c231ea02a78756fe96fed3e56665..6cf238773ca45469cc9c945bcf24de226bacdd01 100644
>--- a/Source/WebCore/platform/win/BString.h
>+++ b/Source/WebCore/platform/win/BString.h
>@@ -46,7 +46,7 @@ namespace WebCore {
> BString(const wchar_t*);
> BString(const wchar_t*, size_t length);
> BString(const String&);
>- BString(const AtomicString&);
>+ BString(const AtomString&);
> BString(const URL&);
> #if USE(CF)
> BString(CFStringRef);
>diff --git a/Source/WebCore/platform/win/SearchPopupMenuWin.cpp b/Source/WebCore/platform/win/SearchPopupMenuWin.cpp
>index 8e74b076935aa0dccd7ea837ace67b3ce7ce155a..8718c69352926b9155e83ccfdbd7941456012700 100644
>--- a/Source/WebCore/platform/win/SearchPopupMenuWin.cpp
>+++ b/Source/WebCore/platform/win/SearchPopupMenuWin.cpp
>@@ -22,7 +22,7 @@
> #include "SearchPopupMenuWin.h"
> 
> #include "SearchPopupMenuDB.h"
>-#include <wtf/text/AtomicString.h>
>+#include <wtf/text/AtomString.h>
> 
> namespace WebCore {
> 
>@@ -41,7 +41,7 @@ bool SearchPopupMenuWin::enabled()
> return true;
> }
> 
>-void SearchPopupMenuWin::saveRecentSearches(const AtomicString& name, const Vector<RecentSearch>& searchItems)
>+void SearchPopupMenuWin::saveRecentSearches(const AtomString& name, const Vector<RecentSearch>& searchItems)
> {
> if (name.isEmpty())
> return;
>@@ -49,7 +49,7 @@ void SearchPopupMenuWin::saveRecentSearches(const AtomicString& name, const Vect
> SearchPopupMenuDB::singleton().saveRecentSearches(name, searchItems);
> }
> 
>-void SearchPopupMenuWin::loadRecentSearches(const AtomicString& name, Vector<RecentSearch>& searchItems)
>+void SearchPopupMenuWin::loadRecentSearches(const AtomString& name, Vector<RecentSearch>& searchItems)
> {
> if (name.isEmpty())
> return;
>diff --git a/Source/WebCore/platform/win/SearchPopupMenuWin.h b/Source/WebCore/platform/win/SearchPopupMenuWin.h
>index 9a7ae8823c5c43ff946a6157afc57b59dc1543e0..5b3075ec56f7baf45fdc16ee4511dfb5d8b6a22a 100644
>--- a/Source/WebCore/platform/win/SearchPopupMenuWin.h
>+++ b/Source/WebCore/platform/win/SearchPopupMenuWin.h
>@@ -31,8 +31,8 @@ public:
> SearchPopupMenuWin(PopupMenuClient*);
> 
> virtual PopupMenu* popupMenu();
>- virtual void saveRecentSearches(const AtomicString& name, const Vector<RecentSearch>&);
>- virtual void loadRecentSearches(const AtomicString& name, Vector<RecentSearch>&);
>+ virtual void saveRecentSearches(const AtomString& name, const Vector<RecentSearch>&);
>+ virtual void loadRecentSearches(const AtomString& name, Vector<RecentSearch>&);
> virtual bool enabled();
> 
> private:
>diff --git a/Source/WebCore/plugins/DOMMimeTypeArray.cpp b/Source/WebCore/plugins/DOMMimeTypeArray.cpp
>index 98503c38be635c217aa4e5e0189f199be0e793f8..eb79a3696ccdfd58959023bb9cf2743992b7055c 100644
>--- a/Source/WebCore/plugins/DOMMimeTypeArray.cpp
>+++ b/Source/WebCore/plugins/DOMMimeTypeArray.cpp
>@@ -25,7 +25,7 @@
> #include "Page.h"
> #include "PluginData.h"
> #include <wtf/IsoMallocInlines.h>
>-#include <wtf/text/AtomicString.h>
>+#include <wtf/text/AtomString.h>
> 
> namespace WebCore {
> 
>@@ -65,7 +65,7 @@ RefPtr<DOMMimeType> DOMMimeTypeArray::item(unsigned index)
> return DOMMimeType::create(data, frame(), index);
> }
> 
>-RefPtr<DOMMimeType> DOMMimeTypeArray::namedItem(const AtomicString& propertyName)
>+RefPtr<DOMMimeType> DOMMimeTypeArray::namedItem(const AtomString& propertyName)
> {
> PluginData* data = getPluginData();
> if (!data)
>@@ -81,7 +81,7 @@ RefPtr<DOMMimeType> DOMMimeTypeArray::namedItem(const AtomicString& propertyName
> return nullptr;
> }
> 
>-Vector<AtomicString> DOMMimeTypeArray::supportedPropertyNames()
>+Vector<AtomString> DOMMimeTypeArray::supportedPropertyNames()
> {
> PluginData* data = getPluginData();
> if (!data)
>@@ -91,7 +91,7 @@ Vector<AtomicString> DOMMimeTypeArray::supportedPropertyNames()
> Vector<size_t> mimePluginIndices;
> data->getWebVisibleMimesAndPluginIndices(mimes, mimePluginIndices);
> 
>- Vector<AtomicString> result;
>+ Vector<AtomString> result;
> result.reserveInitialCapacity(mimes.size());
> for (auto& info : mimes)
> result.uncheckedAppend(WTFMove(info.type));
>diff --git a/Source/WebCore/plugins/DOMMimeTypeArray.h b/Source/WebCore/plugins/DOMMimeTypeArray.h
>index 5e1d41e2e6aa5fe7ae2497a3eff77cd606be10c0..a786d634c63cd62e919db5238cecfb632496d4e6 100644
>--- a/Source/WebCore/plugins/DOMMimeTypeArray.h
>+++ b/Source/WebCore/plugins/DOMMimeTypeArray.h
>@@ -37,8 +37,8 @@ public:
> 
> unsigned length() const;
> RefPtr<DOMMimeType> item(unsigned index);
>- RefPtr<DOMMimeType> namedItem(const AtomicString& propertyName);
>- Vector<AtomicString> supportedPropertyNames();
>+ RefPtr<DOMMimeType> namedItem(const AtomString& propertyName);
>+ Vector<AtomString> supportedPropertyNames();
> 
> private:
> explicit DOMMimeTypeArray(DOMWindow*);
>diff --git a/Source/WebCore/plugins/DOMPlugin.cpp b/Source/WebCore/plugins/DOMPlugin.cpp
>index a45caf86f73b73259e44c3c638ba83298a0fc6c3..9448806b892def94d1ebcb0f117f46c110fe2f39 100644
>--- a/Source/WebCore/plugins/DOMPlugin.cpp
>+++ b/Source/WebCore/plugins/DOMPlugin.cpp
>@@ -22,7 +22,7 @@
> #include "PluginData.h"
> #include "Frame.h"
> #include <wtf/IsoMallocInlines.h>
>-#include <wtf/text/AtomicString.h>
>+#include <wtf/text/AtomString.h>
> 
> namespace WebCore {
> 
>@@ -75,7 +75,7 @@ RefPtr<DOMMimeType> DOMPlugin::item(unsigned index)
> return nullptr;
> }
> 
>-RefPtr<DOMMimeType> DOMPlugin::namedItem(const AtomicString& propertyName)
>+RefPtr<DOMMimeType> DOMPlugin::namedItem(const AtomString& propertyName)
> {
> if (!m_frame || !m_frame->page())
> return nullptr;
>@@ -89,10 +89,10 @@ RefPtr<DOMMimeType> DOMPlugin::namedItem(const AtomicString& propertyName)
> return nullptr;
> }
> 
>-Vector<AtomicString> DOMPlugin::supportedPropertyNames()
>+Vector<AtomString> DOMPlugin::supportedPropertyNames()
> {
> // FIXME: Should be implemented.
>- return Vector<AtomicString>();
>+ return Vector<AtomString>();
> }
> 
> } // namespace WebCore
>diff --git a/Source/WebCore/plugins/DOMPlugin.h b/Source/WebCore/plugins/DOMPlugin.h
>index 35706c8d59cb24201cc58d9635d0ff8dd8bfea32..165437dd8bc59386d91407b2da074ecfebc5c490 100644
>--- a/Source/WebCore/plugins/DOMPlugin.h
>+++ b/Source/WebCore/plugins/DOMPlugin.h
>@@ -43,8 +43,8 @@ public:
> unsigned length() const;
> 
> RefPtr<DOMMimeType> item(unsigned index);
>- RefPtr<DOMMimeType> namedItem(const AtomicString& propertyName);
>- Vector<AtomicString> supportedPropertyNames();
>+ RefPtr<DOMMimeType> namedItem(const AtomString& propertyName);
>+ Vector<AtomString> supportedPropertyNames();
> 
> private:
> DOMPlugin(PluginData*, Frame*, PluginInfo);
>diff --git a/Source/WebCore/plugins/DOMPluginArray.cpp b/Source/WebCore/plugins/DOMPluginArray.cpp
>index 0dfd37ad3b8f30a875042125478acda5ce25e9c1..40361e21940ce1c65f3cab313f5f6653f15a0494 100644
>--- a/Source/WebCore/plugins/DOMPluginArray.cpp
>+++ b/Source/WebCore/plugins/DOMPluginArray.cpp
>@@ -25,7 +25,7 @@
> #include "Page.h"
> #include "PluginData.h"
> #include <wtf/IsoMallocInlines.h>
>-#include <wtf/text/AtomicString.h>
>+#include <wtf/text/AtomString.h>
> 
> namespace WebCore {
> 
>@@ -59,7 +59,7 @@ RefPtr<DOMPlugin> DOMPluginArray::item(unsigned index)
> return DOMPlugin::create(data, frame(), plugins[index]);
> }
> 
>-RefPtr<DOMPlugin> DOMPluginArray::namedItem(const AtomicString& propertyName)
>+RefPtr<DOMPlugin> DOMPluginArray::namedItem(const AtomString& propertyName)
> {
> PluginData* data = pluginData();
> if (!data)
>@@ -72,7 +72,7 @@ RefPtr<DOMPlugin> DOMPluginArray::namedItem(const AtomicString& propertyName)
> return nullptr;
> }
> 
>-Vector<AtomicString> DOMPluginArray::supportedPropertyNames()
>+Vector<AtomString> DOMPluginArray::supportedPropertyNames()
> {
> PluginData* data = pluginData();
> if (!data)
>@@ -80,7 +80,7 @@ Vector<AtomicString> DOMPluginArray::supportedPropertyNames()
> 
> const auto& plugins = data->publiclyVisiblePlugins();
> 
>- Vector<AtomicString> result;
>+ Vector<AtomString> result;
> result.reserveInitialCapacity(plugins.size());
> for (auto& plugin : plugins)
> result.uncheckedAppend(plugin.name);
>diff --git a/Source/WebCore/plugins/DOMPluginArray.h b/Source/WebCore/plugins/DOMPluginArray.h
>index d2c7fbda47f9d6b56015330d22b594b8e4816e59..8cb1e0a44ebcffdc4a42ac72ed0338c6655bcc17 100644
>--- a/Source/WebCore/plugins/DOMPluginArray.h
>+++ b/Source/WebCore/plugins/DOMPluginArray.h
>@@ -37,8 +37,8 @@ public:
> 
> unsigned length() const;
> RefPtr<DOMPlugin> item(unsigned index);
>- RefPtr<DOMPlugin> namedItem(const AtomicString& propertyName);
>- Vector<AtomicString> supportedPropertyNames();
>+ RefPtr<DOMPlugin> namedItem(const AtomString& propertyName);
>+ Vector<AtomString> supportedPropertyNames();
> 
> void refresh(bool reloadPages);
> 
>diff --git a/Source/WebCore/rendering/CounterNode.cpp b/Source/WebCore/rendering/CounterNode.cpp
>index dc0726a0768ba92f591da5adea21adad33fff4f4..250da8774a565f15e8ad893af101fe10a491980a 100644
>--- a/Source/WebCore/rendering/CounterNode.cpp
>+++ b/Source/WebCore/rendering/CounterNode.cpp
>@@ -211,7 +211,7 @@ void CounterNode::recount()
> }
> }
> 
>-void CounterNode::insertAfter(CounterNode& newChild, CounterNode* beforeChild, const AtomicString& identifier)
>+void CounterNode::insertAfter(CounterNode& newChild, CounterNode* beforeChild, const AtomString& identifier)
> {
> ASSERT(!newChild.m_parent);
> ASSERT(!newChild.m_previousSibling);
>diff --git a/Source/WebCore/rendering/CounterNode.h b/Source/WebCore/rendering/CounterNode.h
>index 2575dda4e4bd0298195c687ee5bc3ed165c7f7ed..fe7eb207a97ffbd7f74812a066349bfa7edd0ab2 100644
>--- a/Source/WebCore/rendering/CounterNode.h
>+++ b/Source/WebCore/rendering/CounterNode.h
>@@ -63,7 +63,7 @@ public:
> CounterNode* nextInPreOrder(const CounterNode* stayWithin = nullptr) const;
> CounterNode* nextInPreOrderAfterChildren(const CounterNode* stayWithin = nullptr) const;
> 
>- void insertAfter(CounterNode& newChild, CounterNode* beforeChild, const AtomicString& identifier);
>+ void insertAfter(CounterNode& newChild, CounterNode* beforeChild, const AtomString& identifier);
> // identifier must match the identifier of this counter.
> void removeChild(CounterNode&);
> 
>diff --git a/Source/WebCore/rendering/EllipsisBox.cpp b/Source/WebCore/rendering/EllipsisBox.cpp
>index 35728d870cdd1c1ef1ea9ab689e4cd03f2532f18..2274e7b4bfa6f11eee74e43e54ad025aa7bf1b60 100644
>--- a/Source/WebCore/rendering/EllipsisBox.cpp
>+++ b/Source/WebCore/rendering/EllipsisBox.cpp
>@@ -34,7 +34,7 @@ namespace WebCore {
> 
> WTF_MAKE_ISO_ALLOCATED_IMPL(EllipsisBox);
> 
>-EllipsisBox::EllipsisBox(RenderBlockFlow& renderer, const AtomicString& ellipsisStr, InlineFlowBox* parent, int width, int height, int y, bool firstLine, bool isHorizontal, InlineBox* markupBox)
>+EllipsisBox::EllipsisBox(RenderBlockFlow& renderer, const AtomString& ellipsisStr, InlineFlowBox* parent, int width, int height, int y, bool firstLine, bool isHorizontal, InlineBox* markupBox)
> : InlineElementBox(renderer, FloatPoint(0, y), width, firstLine, true, false, false, isHorizontal, 0, 0, parent)
> , m_shouldPaintMarkupBox(markupBox)
> , m_height(height)
>diff --git a/Source/WebCore/rendering/EllipsisBox.h b/Source/WebCore/rendering/EllipsisBox.h
>index ebe1941441a9f3f59b9a75e414b543f007407514..3f98b7d87fe22d5293287730c86bc2288ca406a6 100644
>--- a/Source/WebCore/rendering/EllipsisBox.h
>+++ b/Source/WebCore/rendering/EllipsisBox.h
>@@ -30,7 +30,7 @@ class HitTestResult;
> class EllipsisBox final : public InlineElementBox {
> WTF_MAKE_ISO_ALLOCATED(EllipsisBox);
> public:
>- EllipsisBox(RenderBlockFlow&, const AtomicString& ellipsisStr, InlineFlowBox* parent, int width, int height, int y, bool firstLine, bool isHorizontal, InlineBox* markupBox);
>+ EllipsisBox(RenderBlockFlow&, const AtomString& ellipsisStr, InlineFlowBox* parent, int width, int height, int y, bool firstLine, bool isHorizontal, InlineBox* markupBox);
> void paint(PaintInfo&, const LayoutPoint&, LayoutUnit lineTop, LayoutUnit lineBottom) override;
> bool nodeAtPoint(const HitTestRequest&, HitTestResult&, const HitTestLocation& locationInContainer, const LayoutPoint& accumulatedOffset, LayoutUnit lineTop, LayoutUnit lineBottom, HitTestAction) final;
> void setSelectionState(RenderObject::SelectionState s) { m_selectionState = s; }
>@@ -48,7 +48,7 @@ private:
> bool m_shouldPaintMarkupBox;
> RenderObject::SelectionState m_selectionState { RenderObject::SelectionNone };
> int m_height;
>- AtomicString m_str;
>+ AtomString m_str;
> };
> 
> } // namespace WebCore
>diff --git a/Source/WebCore/rendering/HitTestResult.cpp b/Source/WebCore/rendering/HitTestResult.cpp
>index b8218cade09da2567b97cc65e1c47003ddf275b1..73b3654767140a0370e4d56956e54f2674b58b36 100644
>--- a/Source/WebCore/rendering/HitTestResult.cpp
>+++ b/Source/WebCore/rendering/HitTestResult.cpp
>@@ -349,7 +349,7 @@ URL HitTestResult::absoluteImageURL() const
> if (!(m_innerNonSharedNode->renderer() && m_innerNonSharedNode->renderer()->isImage()))
> return URL();
> 
>- AtomicString urlString;
>+ AtomString urlString;
> if (is<HTMLEmbedElement>(*m_innerNonSharedNode)
> || is<HTMLImageElement>(*m_innerNonSharedNode)
> || is<HTMLInputElement>(*m_innerNonSharedNode)
>diff --git a/Source/WebCore/rendering/InlineTextBox.cpp b/Source/WebCore/rendering/InlineTextBox.cpp
>index 83566aeedf2d11deeaea3f29d66fcc476c50470d..5f5bd62802d1580f005ff6be02e01ceec71ccc50 100644
>--- a/Source/WebCore/rendering/InlineTextBox.cpp
>+++ b/Source/WebCore/rendering/InlineTextBox.cpp
>@@ -1039,7 +1039,7 @@ void InlineTextBox::paintMarkedTextForeground(PaintInfo& paintInfo, const FloatR
> 
> float emphasisMarkOffset = 0;
> Optional<bool> markExistsAndIsAbove = emphasisMarkExistsAndIsAbove(lineStyle);
>- const AtomicString& emphasisMark = markExistsAndIsAbove ? lineStyle.textEmphasisMarkString() : nullAtom();
>+ const AtomString& emphasisMark = markExistsAndIsAbove ? lineStyle.textEmphasisMarkString() : nullAtom();
> if (!emphasisMark.isEmpty())
> emphasisMarkOffset = *markExistsAndIsAbove ? -font.fontMetrics().ascent() - font.emphasisMarkDescent(emphasisMark) : font.fontMetrics().descent() + font.emphasisMarkAscent(emphasisMark);
> 
>diff --git a/Source/WebCore/rendering/RenderBlock.cpp b/Source/WebCore/rendering/RenderBlock.cpp
>index 14a16e99d8c23650675432bf12fd474c44c1b1ad..a143ed04774d0c9898364b70b41a95f748b68b19 100644
>--- a/Source/WebCore/rendering/RenderBlock.cpp
>+++ b/Source/WebCore/rendering/RenderBlock.cpp
>@@ -3129,9 +3129,9 @@ TextRun RenderBlock::constructTextRun(const String& string, const RenderStyle& s
> return constructTextRun(StringView(string), style, expansion, flags);
> }
> 
>-TextRun RenderBlock::constructTextRun(const AtomicString& atomicString, const RenderStyle& style, ExpansionBehavior expansion, TextRunFlags flags)
>+TextRun RenderBlock::constructTextRun(const AtomString& atomString, const RenderStyle& style, ExpansionBehavior expansion, TextRunFlags flags)
> {
>- return constructTextRun(StringView(atomicString), style, expansion, flags);
>+ return constructTextRun(StringView(atomString), style, expansion, flags);
> }
> 
> TextRun RenderBlock::constructTextRun(const RenderText& text, const RenderStyle& style, ExpansionBehavior expansion)
>diff --git a/Source/WebCore/rendering/RenderBlock.h b/Source/WebCore/rendering/RenderBlock.h
>index fd74af17824db3f7f9c240f2ed64a7dd352f7d39..01ffc8d0deb0f2eb3ff29d5f05057e7f48d8a34b 100644
>--- a/Source/WebCore/rendering/RenderBlock.h
>+++ b/Source/WebCore/rendering/RenderBlock.h
>@@ -201,7 +201,7 @@ public:
> ExpansionBehavior = DefaultExpansion, TextRunFlags = DefaultTextRunFlags);
> static TextRun constructTextRun(const String&, const RenderStyle&,
> ExpansionBehavior = DefaultExpansion, TextRunFlags = DefaultTextRunFlags);
>- static TextRun constructTextRun(const AtomicString&, const RenderStyle&,
>+ static TextRun constructTextRun(const AtomString&, const RenderStyle&,
> ExpansionBehavior = DefaultExpansion, TextRunFlags = DefaultTextRunFlags);
> static TextRun constructTextRun(const RenderText&, const RenderStyle&,
> ExpansionBehavior = DefaultExpansion);
>diff --git a/Source/WebCore/rendering/RenderBlockLineLayout.cpp b/Source/WebCore/rendering/RenderBlockLineLayout.cpp
>index 612b5a5b7287e0ac29aaec4245495a2df028df9c..f94725a65510a13806fefdc8dc1e2b33b641a66c 100644
>--- a/Source/WebCore/rendering/RenderBlockLineLayout.cpp
>+++ b/Source/WebCore/rendering/RenderBlockLineLayout.cpp
>@@ -2127,7 +2127,7 @@ void RenderBlockFlow::checkLinesForTextOverflow()
> // Determine the width of the ellipsis using the current font.
> // FIXME: CSS3 says this is configurable, also need to use 0x002E (FULL STOP) if horizontal ellipsis is "not renderable"
> const FontCascade& font = style().fontCascade();
>- static NeverDestroyed<AtomicString> ellipsisStr(&horizontalEllipsis, 1);
>+ static NeverDestroyed<AtomString> ellipsisStr(&horizontalEllipsis, 1);
> const FontCascade& firstLineFont = firstLineStyle().fontCascade();
> float firstLineEllipsisWidth = firstLineFont.width(constructTextRun(&horizontalEllipsis, 1, firstLineStyle()));
> float ellipsisWidth = (font == firstLineFont) ? firstLineEllipsisWidth : font.width(constructTextRun(&horizontalEllipsis, 1, style()));
>diff --git a/Source/WebCore/rendering/RenderCounter.cpp b/Source/WebCore/rendering/RenderCounter.cpp
>index e5cde49006529a3aa7c8388cacc72cdf6532c07f..22104434e45d6c98476ffd29ab550bd62ac408fe 100644
>--- a/Source/WebCore/rendering/RenderCounter.cpp
>+++ b/Source/WebCore/rendering/RenderCounter.cpp
>@@ -46,10 +46,10 @@ using namespace HTMLNames;
> 
> WTF_MAKE_ISO_ALLOCATED_IMPL(RenderCounter);
> 
>-using CounterMap = HashMap<AtomicString, Ref<CounterNode>>;
>+using CounterMap = HashMap<AtomString, Ref<CounterNode>>;
> using CounterMaps = HashMap<const RenderElement*, std::unique_ptr<CounterMap>>;
> 
>-static CounterNode* makeCounterNode(RenderElement&, const AtomicString& identifier, bool alwaysCreateCounter);
>+static CounterNode* makeCounterNode(RenderElement&, const AtomString& identifier, bool alwaysCreateCounter);
> 
> static CounterMaps& counterMaps()
> {
>@@ -130,7 +130,7 @@ struct CounterPlan {
> int value;
> };
> 
>-static Optional<CounterPlan> planCounter(RenderElement& renderer, const AtomicString& identifier)
>+static Optional<CounterPlan> planCounter(RenderElement& renderer, const AtomString& identifier)
> {
> // We must have a generating node or else we cannot have a counter.
> Element* generatingElement = renderer.generatingElement();
>@@ -194,7 +194,7 @@ struct CounterInsertionPoint {
> RefPtr<CounterNode> previousSibling;
> };
> 
>-static CounterInsertionPoint findPlaceForCounter(RenderElement& counterOwner, const AtomicString& identifier, bool isReset)
>+static CounterInsertionPoint findPlaceForCounter(RenderElement& counterOwner, const AtomString& identifier, bool isReset)
> {
> // We cannot stop searching for counters with the same identifier before we also
> // check this renderer, because it may affect the positioning in the tree of our counter.
>@@ -292,7 +292,7 @@ static CounterInsertionPoint findPlaceForCounter(RenderElement& counterOwner, co
> return { };
> }
> 
>-static CounterNode* makeCounterNode(RenderElement& renderer, const AtomicString& identifier, bool alwaysCreateCounter)
>+static CounterNode* makeCounterNode(RenderElement& renderer, const AtomString& identifier, bool alwaysCreateCounter)
> {
> if (renderer.hasCounterNodeMap()) {
> ASSERT(counterMaps().contains(&renderer));
>@@ -430,7 +430,7 @@ void RenderCounter::computePreferredLogicalWidths(float lead)
> RenderText::computePreferredLogicalWidths(lead);
> }
> 
>-static void destroyCounterNodeWithoutMapRemoval(const AtomicString& identifier, CounterNode& node)
>+static void destroyCounterNodeWithoutMapRemoval(const AtomString& identifier, CounterNode& node)
> {
> RefPtr<CounterNode> previous;
> for (RefPtr<CounterNode> child = node.lastDescendant(); child && child != &node; child = WTFMove(previous)) {
>@@ -454,7 +454,7 @@ void RenderCounter::destroyCounterNodes(RenderElement& owner)
> owner.setHasCounterNodeMap(false);
> }
> 
>-void RenderCounter::destroyCounterNode(RenderElement& owner, const AtomicString& identifier)
>+void RenderCounter::destroyCounterNode(RenderElement& owner, const AtomString& identifier)
> {
> auto map = counterMaps().find(&owner);
> if (map == counterMaps().end())
>@@ -592,7 +592,7 @@ void showCounterRendererTree(const WebCore::RenderObject* renderer, const char*
> while (root->parent())
> root = root->parent();
> 
>- AtomicString identifier(counterName);
>+ AtomString identifier(counterName);
> for (auto* current = root; current; current = current->nextInPreOrder()) {
> if (!is<WebCore::RenderElement>(*current))
> continue;
>diff --git a/Source/WebCore/rendering/RenderCounter.h b/Source/WebCore/rendering/RenderCounter.h
>index 8a90202d450961a158711491d5705562e8548b94..dd96a2e410f6e3a17a2e70e0bea1cbac2c015620 100644
>--- a/Source/WebCore/rendering/RenderCounter.h
>+++ b/Source/WebCore/rendering/RenderCounter.h
>@@ -35,7 +35,7 @@ public:
> virtual ~RenderCounter();
> 
> static void destroyCounterNodes(RenderElement&);
>- static void destroyCounterNode(RenderElement&, const AtomicString& identifier);
>+ static void destroyCounterNode(RenderElement&, const AtomString& identifier);
> static void rendererSubtreeAttached(RenderElement&);
> static void rendererRemovedFromTree(RenderElement&);
> static void rendererStyleChanged(RenderElement&, const RenderStyle* oldStyle, const RenderStyle* newStyle);
>diff --git a/Source/WebCore/rendering/RenderDeprecatedFlexibleBox.cpp b/Source/WebCore/rendering/RenderDeprecatedFlexibleBox.cpp
>index 5e848e2700c868beceff1845149af41fee8b711c..0e7e42b84b096baf55265b374f876e1e20198d3b 100644
>--- a/Source/WebCore/rendering/RenderDeprecatedFlexibleBox.cpp
>+++ b/Source/WebCore/rendering/RenderDeprecatedFlexibleBox.cpp
>@@ -990,8 +990,8 @@ void RenderDeprecatedFlexibleBox::applyLineClamp(FlexBoxIterator& iterator, bool
> continue;
> 
> const UChar ellipsisAndSpace[2] = { horizontalEllipsis, ' ' };
>- static NeverDestroyed<AtomicString> ellipsisAndSpaceStr(ellipsisAndSpace, 2);
>- static NeverDestroyed<AtomicString> ellipsisStr(&horizontalEllipsis, 1);
>+ static NeverDestroyed<AtomString> ellipsisAndSpaceStr(ellipsisAndSpace, 2);
>+ static NeverDestroyed<AtomString> ellipsisStr(&horizontalEllipsis, 1);
> const RenderStyle& lineStyle = numVisibleLines == 1 ? firstLineStyle() : style();
> const FontCascade& font = lineStyle.fontCascade();
> 
>diff --git a/Source/WebCore/rendering/RenderObject.cpp b/Source/WebCore/rendering/RenderObject.cpp
>index b9310df2d50f6f3903cbbff45a5dc0968d2b84de..aab3f46ec403e2f5421e8156545ca44d0ecb1b83 100644
>--- a/Source/WebCore/rendering/RenderObject.cpp
>+++ b/Source/WebCore/rendering/RenderObject.cpp
>@@ -657,7 +657,7 @@ void RenderObject::addPDFURLRect(PaintInfo& paintInfo, const LayoutPoint& paintO
> if (!is<Element>(node) || !node->isLink())
> return;
> Element& element = downcast<Element>(*node);
>- const AtomicString& href = element.getAttribute(hrefAttr);
>+ const AtomString& href = element.getAttribute(hrefAttr);
> if (href.isNull())
> return;
> 
>diff --git a/Source/WebCore/rendering/RenderSearchField.cpp b/Source/WebCore/rendering/RenderSearchField.cpp
>index b37fecc8b9cd4bcc58c2fe9b200ed2850003eb42..8e2dcb0353ed94f60bd4c4adceb353c63c777940 100644
>--- a/Source/WebCore/rendering/RenderSearchField.cpp
>+++ b/Source/WebCore/rendering/RenderSearchField.cpp
>@@ -105,7 +105,7 @@ void RenderSearchField::addSearchResult()
> while (static_cast<int>(m_recentSearches.size()) > inputElement().maxResults())
> m_recentSearches.removeLast();
> 
>- const AtomicString& name = autosaveName();
>+ const AtomString& name = autosaveName();
> if (!m_searchPopup)
> m_searchPopup = page().chrome().createSearchPopupMenu(*this);
> 
>@@ -125,7 +125,7 @@ void RenderSearchField::showPopup()
> 
> m_searchPopupIsVisible = true;
> 
>- const AtomicString& name = autosaveName();
>+ const AtomString& name = autosaveName();
> m_searchPopup->loadRecentSearches(name, m_recentSearches);
> 
> // Trim the recent searches list if the maximum size has changed since we last saved.
>@@ -199,7 +199,7 @@ Visibility RenderSearchField::visibilityForCancelButton() const
> return (style().visibility() == Visibility::Hidden || inputElement().value().isEmpty()) ? Visibility::Hidden : Visibility::Visible;
> }
> 
>-const AtomicString& RenderSearchField::autosaveName() const
>+const AtomString& RenderSearchField::autosaveName() const
> {
> return inputElement().attributeWithoutSynchronization(autosaveAttr);
> }
>@@ -211,7 +211,7 @@ void RenderSearchField::valueChanged(unsigned listIndex, bool fireEvents)
> if (static_cast<int>(listIndex) == (listSize() - 1)) {
> if (fireEvents) {
> m_recentSearches.clear();
>- const AtomicString& name = autosaveName();
>+ const AtomString& name = autosaveName();
> if (!name.isEmpty()) {
> if (!m_searchPopup)
> m_searchPopup = page().chrome().createSearchPopupMenu(*this);
>diff --git a/Source/WebCore/rendering/RenderSearchField.h b/Source/WebCore/rendering/RenderSearchField.h
>index 90987196daa433e58061f716e56ffe910ecd6774..2ad616eb59710874cbe04fbdd4133ec73c648f0c 100644
>--- a/Source/WebCore/rendering/RenderSearchField.h
>+++ b/Source/WebCore/rendering/RenderSearchField.h
>@@ -52,7 +52,7 @@ private:
> LayoutUnit computeControlLogicalHeight(LayoutUnit lineHeight, LayoutUnit nonContentHeight) const override;
> void updateFromElement() override;
> Visibility visibilityForCancelButton() const;
>- const AtomicString& autosaveName() const;
>+ const AtomString& autosaveName() const;
> 
> // PopupMenuClient methods
> void valueChanged(unsigned listIndex, bool fireEvents = true) override;
>diff --git a/Source/WebCore/rendering/RenderTextControlSingleLine.cpp b/Source/WebCore/rendering/RenderTextControlSingleLine.cpp
>index a3018fd077d9960c27a040eb0be331891092aaed..9ee888867110b566529e8fba1025cd5191e1ac39 100644
>--- a/Source/WebCore/rendering/RenderTextControlSingleLine.cpp
>+++ b/Source/WebCore/rendering/RenderTextControlSingleLine.cpp
>@@ -312,7 +312,7 @@ LayoutUnit RenderTextControlSingleLine::preferredContentLogicalWidth(float charW
> float maxCharWidth = 0.f;
> 
> #if !PLATFORM(IOS_FAMILY)
>- const AtomicString& family = style().fontCascade().firstFamily();
>+ const AtomString& family = style().fontCascade().firstFamily();
> // Since Lucida Grande is the default font, we want this to match the width
> // of MS Shell Dlg, the default font for textareas in Firefox, Safari Win and
> // IE for some encodings (in IE, the default font is encoding specific).
>diff --git a/Source/WebCore/rendering/RenderTheme.h b/Source/WebCore/rendering/RenderTheme.h
>index 1d61e48471ec8df57421d68bca61ed2c5b9b9edd..3af56ae56b941882421709c701dcfef8a5a981cd 100644
>--- a/Source/WebCore/rendering/RenderTheme.h
>+++ b/Source/WebCore/rendering/RenderTheme.h
>@@ -140,7 +140,7 @@ public:
> virtual bool supportsHover(const RenderStyle&) const { return false; }
> 
> // A method asking if the platform is able to show datalist suggestions for a given input type.
>- virtual bool supportsDataListUI(const AtomicString&) const { return false; }
>+ virtual bool supportsDataListUI(const AtomString&) const { return false; }
> 
> // Text selection colors.
> Color activeSelectionBackgroundColor(OptionSet<StyleColor::Options>) const;
>diff --git a/Source/WebCore/rendering/RenderThemeMac.mm b/Source/WebCore/rendering/RenderThemeMac.mm
>index 3e379cf750d8bdd713effa72409daaf816d12d2f..e8ca22f0d5301cbc877c953863798ae63f787541 100644
>--- a/Source/WebCore/rendering/RenderThemeMac.mm
>+++ b/Source/WebCore/rendering/RenderThemeMac.mm
>@@ -539,18 +539,18 @@ void RenderThemeMac::updateCachedSystemFontDescription(CSSValueID cssValueId, Fo
> // System-font-ness can't be encapsulated by simply a font name. Instead, we must use a token
> // which FontCache will look for.
> // Make sure we keep this list of possible tokens in sync with FontCascade::primaryFontIsSystemFont()
>- AtomicString fontName;
>+ AtomString fontName;
> switch (cssValueId) {
> case CSSValueSmallCaption:
> font = [NSFont systemFontOfSize:[NSFont smallSystemFontSize]];
> break;
> case CSSValueMenu:
> font = [NSFont menuFontOfSize:[NSFont systemFontSize]];
>- fontName = AtomicString("-apple-menu", AtomicString::ConstructFromLiteral);
>+ fontName = AtomString("-apple-menu", AtomString::ConstructFromLiteral);
> break;
> case CSSValueStatusBar:
> font = [NSFont labelFontOfSize:[NSFont labelFontSize]];
>- fontName = AtomicString("-apple-status-bar", AtomicString::ConstructFromLiteral);
>+ fontName = AtomString("-apple-status-bar", AtomString::ConstructFromLiteral);
> break;
> case CSSValueWebkitMiniControl:
> font = [NSFont systemFontOfSize:[NSFont systemFontSizeForControlSize:NSControlSizeMini]];
>@@ -569,7 +569,7 @@ void RenderThemeMac::updateCachedSystemFontDescription(CSSValueID cssValueId, Fo
> return;
> 
> if (fontName.isNull())
>- fontName = AtomicString("system-ui", AtomicString::ConstructFromLiteral);
>+ fontName = AtomString("system-ui", AtomString::ConstructFromLiteral);
> 
> NSFontManager *fontManager = [NSFontManager sharedFontManager];
> fontDescription.setIsAbsoluteSize(true);
>@@ -1096,7 +1096,7 @@ void RenderThemeMac::setFontFromControlSize(StyleResolver&, RenderStyle& style,
> fontDescription.setIsAbsoluteSize(true);
> 
> NSFont* font = [NSFont systemFontOfSize:[NSFont systemFontSizeForControlSize:controlSize]];
>- fontDescription.setOneFamily(AtomicString("-apple-system", AtomicString::ConstructFromLiteral));
>+ fontDescription.setOneFamily(AtomString("-apple-system", AtomString::ConstructFromLiteral));
> fontDescription.setComputedSize([font pointSize] * style.effectiveZoom());
> fontDescription.setSpecifiedSize([font pointSize] * style.effectiveZoom());
> 
>diff --git a/Source/WebCore/rendering/RootInlineBox.cpp b/Source/WebCore/rendering/RootInlineBox.cpp
>index c2554d46fc97f971e8ba9ee88f38b95fb963a698..eb76f4b269fbaec45942636797f94107d54b8271 100644
>--- a/Source/WebCore/rendering/RootInlineBox.cpp
>+++ b/Source/WebCore/rendering/RootInlineBox.cpp
>@@ -123,7 +123,7 @@ bool RootInlineBox::lineCanAccommodateEllipsis(bool ltr, int blockEdge, int line
> return InlineFlowBox::canAccommodateEllipsis(ltr, blockEdge, ellipsisWidth);
> }
> 
>-float RootInlineBox::placeEllipsis(const AtomicString& ellipsisStr, bool ltr, float blockLeftEdge, float blockRightEdge, float ellipsisWidth, InlineBox* markupBox)
>+float RootInlineBox::placeEllipsis(const AtomString& ellipsisStr, bool ltr, float blockLeftEdge, float blockRightEdge, float ellipsisWidth, InlineBox* markupBox)
> {
> if (!gEllipsisBoxMap)
> gEllipsisBoxMap = new EllipsisBoxMap();
>diff --git a/Source/WebCore/rendering/RootInlineBox.h b/Source/WebCore/rendering/RootInlineBox.h
>index a6795a4093b6749a0935a949914822592112a962..7df28288a4d55c2c7d26ad4bc0176d0b76178364 100644
>--- a/Source/WebCore/rendering/RootInlineBox.h
>+++ b/Source/WebCore/rendering/RootInlineBox.h
>@@ -104,7 +104,7 @@ public:
> 
> bool lineCanAccommodateEllipsis(bool ltr, int blockEdge, int lineBoxEdge, int ellipsisWidth);
> // Return the truncatedWidth, the width of the truncated text + ellipsis.
>- float placeEllipsis(const AtomicString& ellipsisStr, bool ltr, float blockLeftEdge, float blockRightEdge, float ellipsisWidth, InlineBox* markupBox = nullptr);
>+ float placeEllipsis(const AtomString& ellipsisStr, bool ltr, float blockLeftEdge, float blockRightEdge, float ellipsisWidth, InlineBox* markupBox = nullptr);
> // Return the position of the EllipsisBox or -1.
> float placeEllipsisBox(bool ltr, float blockLeftEdge, float blockRightEdge, float ellipsisWidth, float &truncatedWidth, bool& foundBox) final;
> 
>diff --git a/Source/WebCore/rendering/SimpleLineLayoutTextFragmentIterator.h b/Source/WebCore/rendering/SimpleLineLayoutTextFragmentIterator.h
>index 9ecfd9df1f8539025d3eb3692e7f6faa758f881d..cfc9c37d63cbd14934d04f57e72ab137a61f083e 100644
>--- a/Source/WebCore/rendering/SimpleLineLayoutTextFragmentIterator.h
>+++ b/Source/WebCore/rendering/SimpleLineLayoutTextFragmentIterator.h
>@@ -123,7 +123,7 @@ public:
> float hyphenStringWidth;
> unsigned hyphenLimitBefore;
> unsigned hyphenLimitAfter;
>- AtomicString locale;
>+ AtomString locale;
> Optional<unsigned> hyphenLimitLines;
> };
> const Style& style() const { return m_style; }
>diff --git a/Source/WebCore/rendering/TextPainter.cpp b/Source/WebCore/rendering/TextPainter.cpp
>index b0ecb92020f09857de643e3578221b60fb61aaa2..5a1c984e1968bd2aec6707cdb641643b7374fdab 100644
>--- a/Source/WebCore/rendering/TextPainter.cpp
>+++ b/Source/WebCore/rendering/TextPainter.cpp
>@@ -99,7 +99,7 @@ TextPainter::TextPainter(GraphicsContext& context)
> {
> }
> 
>-void TextPainter::paintTextOrEmphasisMarks(const FontCascade& font, const TextRun& textRun, const AtomicString& emphasisMark,
>+void TextPainter::paintTextOrEmphasisMarks(const FontCascade& font, const TextRun& textRun, const AtomString& emphasisMark,
> float emphasisMarkOffset, const FloatPoint& textOrigin, unsigned startOffset, unsigned endOffset)
> {
> ASSERT(startOffset < endOffset);
>@@ -118,7 +118,7 @@ void TextPainter::paintTextOrEmphasisMarks(const FontCascade& font, const TextRu
> }
> 
> void TextPainter::paintTextWithShadows(const ShadowData* shadow, const FilterOperations* colorFilter, const FontCascade& font, const TextRun& textRun, const FloatRect& boxRect, const FloatPoint& textOrigin,
>- unsigned startOffset, unsigned endOffset, const AtomicString& emphasisMark, float emphasisMarkOffset, bool stroked)
>+ unsigned startOffset, unsigned endOffset, const AtomString& emphasisMark, float emphasisMarkOffset, bool stroked)
> {
> if (!shadow) {
> paintTextOrEmphasisMarks(font, textRun, emphasisMark, emphasisMarkOffset, textOrigin, startOffset, endOffset);
>diff --git a/Source/WebCore/rendering/TextPainter.h b/Source/WebCore/rendering/TextPainter.h
>index 0ee0c85b4b05316597dde3b5642506d6c70d4f16..e4534cbfbf18701764747a583385d798d0715982 100644
>--- a/Source/WebCore/rendering/TextPainter.h
>+++ b/Source/WebCore/rendering/TextPainter.h
>@@ -27,7 +27,7 @@
> #include "GlyphDisplayListCache.h"
> #include "TextFlags.h"
> #include "TextPaintStyle.h"
>-#include <wtf/text/AtomicString.h>
>+#include <wtf/text/AtomString.h>
> 
> namespace WebCore {
> 
>@@ -56,7 +56,7 @@ public:
> void setShadowColorFilter(const FilterOperations* colorFilter) { m_shadowColorFilter = colorFilter; }
> void setFont(const FontCascade& font) { m_font = &font; }
> void setIsHorizontal(bool isHorizontal) { m_textBoxIsHorizontal = isHorizontal; }
>- void setEmphasisMark(const AtomicString& mark, float offset, const RenderCombineText*);
>+ void setEmphasisMark(const AtomString& mark, float offset, const RenderCombineText*);
> 
> void paint(const TextRun&, const FloatRect& boxRect, const FloatPoint& textOrigin);
> void paintRange(const TextRun&, const FloatRect& boxRect, const FloatPoint& textOrigin, unsigned start, unsigned end);
>@@ -77,17 +77,17 @@ public:
> static bool shouldUseGlyphDisplayList(const PaintInfo&);
> 
> private:
>- void paintTextOrEmphasisMarks(const FontCascade&, const TextRun&, const AtomicString& emphasisMark, float emphasisMarkOffset,
>+ void paintTextOrEmphasisMarks(const FontCascade&, const TextRun&, const AtomString& emphasisMark, float emphasisMarkOffset,
> const FloatPoint& textOrigin, unsigned startOffset, unsigned endOffset);
> void paintTextWithShadows(const ShadowData*, const FilterOperations*, const FontCascade&, const TextRun&, const FloatRect& boxRect, const FloatPoint& textOrigin,
>- unsigned startOffset, unsigned endOffset, const AtomicString& emphasisMark, float emphasisMarkOffset, bool stroked);
>+ unsigned startOffset, unsigned endOffset, const AtomString& emphasisMark, float emphasisMarkOffset, bool stroked);
> void paintTextAndEmphasisMarksIfNeeded(const TextRun&, const FloatRect& boxRect, const FloatPoint& textOrigin, unsigned startOffset, unsigned endOffset,
> const TextPaintStyle&, const ShadowData*, const FilterOperations*);
> 
> GraphicsContext& m_context;
> const FontCascade* m_font { nullptr };
> TextPaintStyle m_style;
>- AtomicString m_emphasisMark;
>+ AtomString m_emphasisMark;
> const ShadowData* m_shadow { nullptr };
> const FilterOperations* m_shadowColorFilter { nullptr };
> const RenderCombineText* m_combinedText { nullptr };
>@@ -96,7 +96,7 @@ private:
> bool m_textBoxIsHorizontal { true };
> };
> 
>-inline void TextPainter::setEmphasisMark(const AtomicString& mark, float offset, const RenderCombineText* combinedText)
>+inline void TextPainter::setEmphasisMark(const AtomString& mark, float offset, const RenderCombineText* combinedText)
> {
> m_emphasisMark = mark;
> m_emphasisMarkOffset = offset;
>diff --git a/Source/WebCore/rendering/line/BreakingContext.h b/Source/WebCore/rendering/line/BreakingContext.h
>index d6f5ccd9956f14ff52744cdd725d98cc2f5f6d36..e1ab8d9a58d98e6071c47663bde4c896b06c52b1 100644
>--- a/Source/WebCore/rendering/line/BreakingContext.h
>+++ b/Source/WebCore/rendering/line/BreakingContext.h
>@@ -576,7 +576,7 @@ inline void ensureCharacterGetsLineBox(LineWhitespaceCollapsingState& lineWhites
> lineWhitespaceCollapsingState.stopIgnoringSpaces(InlineIterator(0, textParagraphSeparator.renderer(), textParagraphSeparator.offset()));
> }
> 
>-inline void tryHyphenating(RenderText& text, const FontCascade& font, const AtomicString& localeIdentifier, unsigned consecutiveHyphenatedLines, int consecutiveHyphenatedLinesLimit, int minimumPrefixLimit, int minimumSuffixLimit, unsigned lastSpace, unsigned pos, float xPos, float availableWidth, bool isFixedPitch, bool collapseWhiteSpace, int lastSpaceWordSpacing, InlineIterator& lineBreak, Optional<unsigned> nextBreakable, bool& hyphenated)
>+inline void tryHyphenating(RenderText& text, const FontCascade& font, const AtomString& localeIdentifier, unsigned consecutiveHyphenatedLines, int consecutiveHyphenatedLinesLimit, int minimumPrefixLimit, int minimumSuffixLimit, unsigned lastSpace, unsigned pos, float xPos, float availableWidth, bool isFixedPitch, bool collapseWhiteSpace, int lastSpaceWordSpacing, InlineIterator& lineBreak, Optional<unsigned> nextBreakable, bool& hyphenated)
> {
> // Map 'hyphenate-limit-{before,after}: auto;' to 2.
> unsigned minimumPrefixLength;
>diff --git a/Source/WebCore/rendering/style/CounterContent.h b/Source/WebCore/rendering/style/CounterContent.h
>index 9a7d659f3fb3ecad21e2ed4ecd7e0c0f65383bb9..e9280c0311addc598bcdd15d42750e9d3c3d6164 100644
>--- a/Source/WebCore/rendering/style/CounterContent.h
>+++ b/Source/WebCore/rendering/style/CounterContent.h
>@@ -25,28 +25,28 @@
> #pragma once
> 
> #include "RenderStyleConstants.h"
>-#include <wtf/text/AtomicString.h>
>+#include <wtf/text/AtomString.h>
> 
> namespace WebCore {
> 
> class CounterContent {
> WTF_MAKE_FAST_ALLOCATED;
> public:
>- CounterContent(const AtomicString& identifier, ListStyleType style, const AtomicString& separator)
>+ CounterContent(const AtomString& identifier, ListStyleType style, const AtomString& separator)
> : m_identifier(identifier)
> , m_listStyle(style)
> , m_separator(separator)
> {
> }
> 
>- const AtomicString& identifier() const { return m_identifier; }
>+ const AtomString& identifier() const { return m_identifier; }
> ListStyleType listStyle() const { return m_listStyle; }
>- const AtomicString& separator() const { return m_separator; }
>+ const AtomString& separator() const { return m_separator; }
> 
> private:
>- AtomicString m_identifier;
>+ AtomString m_identifier;
> ListStyleType m_listStyle;
>- AtomicString m_separator;
>+ AtomString m_separator;
> };
> 
> static inline bool operator==(const CounterContent& a, const CounterContent& b)
>diff --git a/Source/WebCore/rendering/style/CounterDirectives.h b/Source/WebCore/rendering/style/CounterDirectives.h
>index 5503e9fe4667720e7318f723176c226741287bce..1402491e08af9704128f712e2a8ddf228d933edd 100644
>--- a/Source/WebCore/rendering/style/CounterDirectives.h
>+++ b/Source/WebCore/rendering/style/CounterDirectives.h
>@@ -21,7 +21,7 @@
> #pragma once
> 
> #include <wtf/HashMap.h>
>-#include <wtf/text/AtomicStringHash.h>
>+#include <wtf/text/AtomStringHash.h>
> 
> namespace WebCore {
> 
>@@ -40,6 +40,6 @@ constexpr bool operator!=(const CounterDirectives& a, const CounterDirectives& b
> return !(a == b);
> }
> 
>-using CounterDirectiveMap = HashMap<AtomicString, CounterDirectives>;
>+using CounterDirectiveMap = HashMap<AtomString, CounterDirectives>;
> 
> } // namespace WebCore
>diff --git a/Source/WebCore/rendering/style/KeyframeList.h b/Source/WebCore/rendering/style/KeyframeList.h
>index d66f298fdcdd60e95ce16ac9e6ddbf1af348df07..c932cd56ad1ababc2d6c1b98d408736cfe1de9c2 100644
>--- a/Source/WebCore/rendering/style/KeyframeList.h
>+++ b/Source/WebCore/rendering/style/KeyframeList.h
>@@ -27,7 +27,7 @@
> #include "CSSPropertyNames.h"
> #include <wtf/Vector.h>
> #include <wtf/HashSet.h>
>-#include <wtf/text/AtomicString.h>
>+#include <wtf/text/AtomString.h>
> 
> namespace WebCore {
> 
>@@ -64,7 +64,7 @@ private:
> 
> class KeyframeList {
> public:
>- explicit KeyframeList(const AtomicString& animationName)
>+ explicit KeyframeList(const AtomString& animationName)
> : m_animationName(animationName)
> {
> }
>@@ -74,7 +74,7 @@ public:
> bool operator==(const KeyframeList& o) const;
> bool operator!=(const KeyframeList& o) const { return !(*this == o); }
> 
>- const AtomicString& animationName() const { return m_animationName; }
>+ const AtomString& animationName() const { return m_animationName; }
> 
> void insert(KeyframeValue&&);
> 
>@@ -89,7 +89,7 @@ public:
> const Vector<KeyframeValue>& keyframes() const { return m_keyframes; }
> 
> private:
>- AtomicString m_animationName;
>+ AtomString m_animationName;
> Vector<KeyframeValue> m_keyframes; // Kept sorted by key.
> HashSet<CSSPropertyID> m_properties; // The properties being animated.
> };
>diff --git a/Source/WebCore/rendering/style/RenderStyle.cpp b/Source/WebCore/rendering/style/RenderStyle.cpp
>index 0aa79711e9be4458ca7567233493251bef8b7d90..14b1ca03874bc8d7261673d4071a23b74fb6ff77 100644
>--- a/Source/WebCore/rendering/style/RenderStyle.cpp
>+++ b/Source/WebCore/rendering/style/RenderStyle.cpp
>@@ -1477,7 +1477,7 @@ CounterDirectiveMap& RenderStyle::accessCounterDirectives()
> return *map;
> }
> 
>-const AtomicString& RenderStyle::hyphenString() const
>+const AtomString& RenderStyle::hyphenString() const
> {
> ASSERT(hyphens() != Hyphens::None);
> 
>@@ -1486,12 +1486,12 @@ const AtomicString& RenderStyle::hyphenString() const
> return hyphenationString;
> 
> // FIXME: This should depend on locale.
>- static NeverDestroyed<AtomicString> hyphenMinusString(&hyphenMinus, 1);
>- static NeverDestroyed<AtomicString> hyphenString(&hyphen, 1);
>+ static NeverDestroyed<AtomString> hyphenMinusString(&hyphenMinus, 1);
>+ static NeverDestroyed<AtomString> hyphenString(&hyphen, 1);
> return fontCascade().primaryFont().glyphForCharacter(hyphen) ? hyphenString : hyphenMinusString;
> }
> 
>-const AtomicString& RenderStyle::textEmphasisMarkString() const
>+const AtomString& RenderStyle::textEmphasisMarkString() const
> {
> switch (textEmphasisMark()) {
> case TextEmphasisMark::None:
>@@ -1499,28 +1499,28 @@ const AtomicString& RenderStyle::textEmphasisMarkString() const
> case TextEmphasisMark::Custom:
> return textEmphasisCustomMark();
> case TextEmphasisMark::Dot: {
>- static NeverDestroyed<AtomicString> filledDotString(&bullet, 1);
>- static NeverDestroyed<AtomicString> openDotString(&whiteBullet, 1);
>+ static NeverDestroyed<AtomString> filledDotString(&bullet, 1);
>+ static NeverDestroyed<AtomString> openDotString(&whiteBullet, 1);
> return textEmphasisFill() == TextEmphasisFill::Filled ? filledDotString : openDotString;
> }
> case TextEmphasisMark::Circle: {
>- static NeverDestroyed<AtomicString> filledCircleString(&blackCircle, 1);
>- static NeverDestroyed<AtomicString> openCircleString(&whiteCircle, 1);
>+ static NeverDestroyed<AtomString> filledCircleString(&blackCircle, 1);
>+ static NeverDestroyed<AtomString> openCircleString(&whiteCircle, 1);
> return textEmphasisFill() == TextEmphasisFill::Filled ? filledCircleString : openCircleString;
> }
> case TextEmphasisMark::DoubleCircle: {
>- static NeverDestroyed<AtomicString> filledDoubleCircleString(&fisheye, 1);
>- static NeverDestroyed<AtomicString> openDoubleCircleString(&bullseye, 1);
>+ static NeverDestroyed<AtomString> filledDoubleCircleString(&fisheye, 1);
>+ static NeverDestroyed<AtomString> openDoubleCircleString(&bullseye, 1);
> return textEmphasisFill() == TextEmphasisFill::Filled ? filledDoubleCircleString : openDoubleCircleString;
> }
> case TextEmphasisMark::Triangle: {
>- static NeverDestroyed<AtomicString> filledTriangleString(&blackUpPointingTriangle, 1);
>- static NeverDestroyed<AtomicString> openTriangleString(&whiteUpPointingTriangle, 1);
>+ static NeverDestroyed<AtomString> filledTriangleString(&blackUpPointingTriangle, 1);
>+ static NeverDestroyed<AtomString> openTriangleString(&whiteUpPointingTriangle, 1);
> return textEmphasisFill() == TextEmphasisFill::Filled ? filledTriangleString : openTriangleString;
> }
> case TextEmphasisMark::Sesame: {
>- static NeverDestroyed<AtomicString> filledSesameString(&sesameDot, 1);
>- static NeverDestroyed<AtomicString> openSesameString(&whiteSesameDot, 1);
>+ static NeverDestroyed<AtomString> filledSesameString(&sesameDot, 1);
>+ static NeverDestroyed<AtomString> openSesameString(&whiteSesameDot, 1);
> return textEmphasisFill() == TextEmphasisFill::Filled ? filledSesameString : openSesameString;
> }
> case TextEmphasisMark::Auto:
>diff --git a/Source/WebCore/rendering/style/RenderStyle.h b/Source/WebCore/rendering/style/RenderStyle.h
>index 2c55d012de2be8d7903908d1e641d2dc52f78afd..ec30ea63fa8507972363e1d4b8a113fb71b5eed6 100644
>--- a/Source/WebCore/rendering/style/RenderStyle.h
>+++ b/Source/WebCore/rendering/style/RenderStyle.h
>@@ -186,9 +186,9 @@ public:
> 
> const CustomPropertyValueMap& inheritedCustomProperties() const { return m_rareInheritedData->customProperties->values; }
> const CustomPropertyValueMap& nonInheritedCustomProperties() const { return m_rareNonInheritedData->customProperties->values; }
>- const CSSCustomPropertyValue* getCustomProperty(const AtomicString&) const;
>- void setInheritedCustomPropertyValue(const AtomicString& name, Ref<CSSCustomPropertyValue>&& value) { return m_rareInheritedData.access().customProperties.access().setCustomPropertyValue(name, WTFMove(value)); }
>- void setNonInheritedCustomPropertyValue(const AtomicString& name, Ref<CSSCustomPropertyValue>&& value) { return m_rareNonInheritedData.access().customProperties.access().setCustomPropertyValue(name, WTFMove(value)); }
>+ const CSSCustomPropertyValue* getCustomProperty(const AtomString&) const;
>+ void setInheritedCustomPropertyValue(const AtomString& name, Ref<CSSCustomPropertyValue>&& value) { return m_rareInheritedData.access().customProperties.access().setCustomPropertyValue(name, WTFMove(value)); }
>+ void setNonInheritedCustomPropertyValue(const AtomString& name, Ref<CSSCustomPropertyValue>&& value) { return m_rareNonInheritedData.access().customProperties.access().setCustomPropertyValue(name, WTFMove(value)); }
> 
> void setHasViewportUnits(bool v = true) { m_nonInheritedFlags.hasViewportUnits = v; }
> bool hasViewportUnits() const { return m_nonInheritedFlags.hasViewportUnits; }
>@@ -598,8 +598,8 @@ public:
> short hyphenationLimitBefore() const { return m_rareInheritedData->hyphenationLimitBefore; }
> short hyphenationLimitAfter() const { return m_rareInheritedData->hyphenationLimitAfter; }
> short hyphenationLimitLines() const { return m_rareInheritedData->hyphenationLimitLines; }
>- const AtomicString& hyphenationString() const { return m_rareInheritedData->hyphenationString; }
>- const AtomicString& locale() const { return fontDescription().locale(); }
>+ const AtomString& hyphenationString() const { return m_rareInheritedData->hyphenationString; }
>+ const AtomString& locale() const { return fontDescription().locale(); }
> BorderFit borderFit() const { return static_cast<BorderFit>(m_rareNonInheritedData->borderFit); }
> Resize resize() const { return static_cast<Resize>(m_rareNonInheritedData->resize); }
> ColumnAxis columnAxis() const { return static_cast<ColumnAxis>(m_rareNonInheritedData->multiCol->axis); }
>@@ -627,9 +627,9 @@ public:
> 
> TextEmphasisFill textEmphasisFill() const { return static_cast<TextEmphasisFill>(m_rareInheritedData->textEmphasisFill); }
> TextEmphasisMark textEmphasisMark() const;
>- const AtomicString& textEmphasisCustomMark() const { return m_rareInheritedData->textEmphasisCustomMark; }
>+ const AtomString& textEmphasisCustomMark() const { return m_rareInheritedData->textEmphasisCustomMark; }
> OptionSet<TextEmphasisPosition> textEmphasisPosition() const { return OptionSet<TextEmphasisPosition>::fromRaw(m_rareInheritedData->textEmphasisPosition); }
>- const AtomicString& textEmphasisMarkString() const;
>+ const AtomString& textEmphasisMarkString() const;
> 
> RubyPosition rubyPosition() const { return static_cast<RubyPosition>(m_rareInheritedData->rubyPosition); }
> 
>@@ -661,7 +661,7 @@ public:
> 
> // End CSS3 Getters
> 
>- const AtomicString& lineGrid() const { return m_rareInheritedData->lineGrid; }
>+ const AtomString& lineGrid() const { return m_rareInheritedData->lineGrid; }
> LineSnap lineSnap() const { return static_cast<LineSnap>(m_rareInheritedData->lineSnap); }
> LineAlign lineAlign() const { return static_cast<LineAlign>(m_rareInheritedData->lineAlign); }
> 
>@@ -1129,7 +1129,7 @@ public:
> void setHyphenationLimitBefore(short limit) { SET_VAR(m_rareInheritedData, hyphenationLimitBefore, limit); }
> void setHyphenationLimitAfter(short limit) { SET_VAR(m_rareInheritedData, hyphenationLimitAfter, limit); }
> void setHyphenationLimitLines(short limit) { SET_VAR(m_rareInheritedData, hyphenationLimitLines, limit); }
>- void setHyphenationString(const AtomicString& h) { SET_VAR(m_rareInheritedData, hyphenationString, h); }
>+ void setHyphenationString(const AtomString& h) { SET_VAR(m_rareInheritedData, hyphenationString, h); }
> void setBorderFit(BorderFit b) { SET_VAR(m_rareNonInheritedData, borderFit, static_cast<unsigned>(b)); }
> void setResize(Resize r) { SET_VAR(m_rareNonInheritedData, resize, static_cast<unsigned>(r)); }
> void setColumnAxis(ColumnAxis axis) { SET_NESTED_VAR(m_rareNonInheritedData, multiCol, axis, static_cast<unsigned>(axis)); }
>@@ -1160,7 +1160,7 @@ public:
> void setTextEmphasisColor(const Color& c) { SET_VAR(m_rareInheritedData, textEmphasisColor, c); }
> void setTextEmphasisFill(TextEmphasisFill fill) { SET_VAR(m_rareInheritedData, textEmphasisFill, static_cast<unsigned>(fill)); }
> void setTextEmphasisMark(TextEmphasisMark mark) { SET_VAR(m_rareInheritedData, textEmphasisMark, static_cast<unsigned>(mark)); }
>- void setTextEmphasisCustomMark(const AtomicString& mark) { SET_VAR(m_rareInheritedData, textEmphasisCustomMark, mark); }
>+ void setTextEmphasisCustomMark(const AtomString& mark) { SET_VAR(m_rareInheritedData, textEmphasisCustomMark, mark); }
> void setTextEmphasisPosition(OptionSet<TextEmphasisPosition> position) { SET_VAR(m_rareInheritedData, textEmphasisPosition, static_cast<unsigned>(position.toRaw())); }
> bool setTextOrientation(TextOrientation);
> 
>@@ -1190,7 +1190,7 @@ public:
> 
> // End CSS3 Setters
> 
>- void setLineGrid(const AtomicString& lineGrid) { SET_VAR(m_rareInheritedData, lineGrid, lineGrid); }
>+ void setLineGrid(const AtomString& lineGrid) { SET_VAR(m_rareInheritedData, lineGrid, lineGrid); }
> void setLineSnap(LineSnap lineSnap) { SET_VAR(m_rareInheritedData, lineSnap, static_cast<unsigned>(lineSnap)); }
> void setLineAlign(LineAlign lineAlign) { SET_VAR(m_rareInheritedData, lineAlign, static_cast<unsigned>(lineAlign)); }
> 
>@@ -1394,7 +1394,7 @@ public:
> 
> bool willChangeCreatesStackingContext() const;
> 
>- const AtomicString& hyphenString() const;
>+ const AtomString& hyphenString() const;
> 
> bool inheritedNotEqual(const RenderStyle*) const;
> bool inheritedDataShared(const RenderStyle*) const;
>@@ -1548,7 +1548,7 @@ public:
> static short initialHyphenationLimitBefore() { return -1; }
> static short initialHyphenationLimitAfter() { return -1; }
> static short initialHyphenationLimitLines() { return -1; }
>- static const AtomicString& initialHyphenationString() { return nullAtom(); }
>+ static const AtomString& initialHyphenationString() { return nullAtom(); }
> static BorderFit initialBorderFit() { return BorderFit::Border; }
> static Resize initialResize() { return Resize::None; }
> static ControlPart initialAppearance() { return NoControlPart; }
>@@ -1577,7 +1577,7 @@ public:
> static Color initialTextEmphasisColor() { return Color(); }
> static TextEmphasisFill initialTextEmphasisFill() { return TextEmphasisFill::Filled; }
> static TextEmphasisMark initialTextEmphasisMark() { return TextEmphasisMark::None; }
>- static const AtomicString& initialTextEmphasisCustomMark() { return nullAtom(); }
>+ static const AtomString& initialTextEmphasisCustomMark() { return nullAtom(); }
> static OptionSet<TextEmphasisPosition> initialTextEmphasisPosition() { return { TextEmphasisPosition::Over, TextEmphasisPosition::Right }; }
> static RubyPosition initialRubyPosition() { return RubyPosition::Before; }
> static LineBoxContain initialLineBoxContain() { return LineBoxContainBlock | LineBoxContainInline | LineBoxContainReplaced; }
>@@ -1590,7 +1590,7 @@ public:
> static StyleImage* initialMaskBoxImageSource() { return nullptr; }
> static PrintColorAdjust initialPrintColorAdjust() { return PrintColorAdjust::Economy; }
> static QuotesData* initialQuotes() { return nullptr; }
>- static const AtomicString& initialContentAltText() { return emptyAtom(); }
>+ static const AtomString& initialContentAltText() { return emptyAtom(); }
> 
> #if ENABLE(DARK_MODE_CSS)
> static StyleColorScheme initialColorScheme() { return { }; }
>@@ -1664,7 +1664,7 @@ public:
> 
> static TabSize initialTabSize() { return 8; }
> 
>- static const AtomicString& initialLineGrid() { return nullAtom(); }
>+ static const AtomString& initialLineGrid() { return nullAtom(); }
> static LineSnap initialLineSnap() { return LineSnap::None; }
> static LineAlign initialLineAlign() { return LineAlign::None; }
> 
>@@ -2029,7 +2029,7 @@ inline BorderStyle collapsedBorderStyle(BorderStyle style)
> return style;
> }
> 
>-inline const CSSCustomPropertyValue* RenderStyle::getCustomProperty(const AtomicString& name) const
>+inline const CSSCustomPropertyValue* RenderStyle::getCustomProperty(const AtomString& name) const
> {
> for (auto* map : { &nonInheritedCustomProperties(), &inheritedCustomProperties() }) {
> if (auto* val = map->get(name))
>diff --git a/Source/WebCore/rendering/style/StyleCustomPropertyData.h b/Source/WebCore/rendering/style/StyleCustomPropertyData.h
>index 132e6f52560e65cac54e4c5b53fd7d41035f75fa..ecc778293981e7c2d6566a5a17e0f20bf5e12179 100644
>--- a/Source/WebCore/rendering/style/StyleCustomPropertyData.h
>+++ b/Source/WebCore/rendering/style/StyleCustomPropertyData.h
>@@ -27,7 +27,7 @@
> #include <wtf/HashMap.h>
> #include <wtf/RefCounted.h>
> #include <wtf/RefPtr.h>
>-#include <wtf/text/AtomicStringHash.h>
>+#include <wtf/text/AtomStringHash.h>
> 
> namespace WebCore {
> 
>@@ -52,7 +52,7 @@ public:
> 
> bool operator!=(const StyleCustomPropertyData& other) const { return !(*this == other); }
> 
>- void setCustomPropertyValue(const AtomicString& name, Ref<CSSCustomPropertyValue>&& value)
>+ void setCustomPropertyValue(const AtomString& name, Ref<CSSCustomPropertyValue>&& value)
> {
> values.set(name, WTFMove(value));
> }
>diff --git a/Source/WebCore/rendering/style/StyleRareInheritedData.cpp b/Source/WebCore/rendering/style/StyleRareInheritedData.cpp
>index 14e31b5c506affd53a6ba934a0c5c12e709fb058..ad2cbd957eef82560cfb352e9f50b39e633a26ff 100644
>--- a/Source/WebCore/rendering/style/StyleRareInheritedData.cpp
>+++ b/Source/WebCore/rendering/style/StyleRareInheritedData.cpp
>@@ -42,7 +42,7 @@ struct GreaterThanOrSameSizeAsStyleRareInheritedData : public RefCounted<Greater
> float firstFloat;
> Color colors[9];
> void* ownPtrs[1];
>- AtomicString atomicStrings[5];
>+ AtomString atomStrings[5];
> void* refPtrs[3];
> Length lengths[2];
> float secondFloat;
>diff --git a/Source/WebCore/rendering/style/StyleRareInheritedData.h b/Source/WebCore/rendering/style/StyleRareInheritedData.h
>index e5c594384bd66d54820b4c641bbfaa6c35e13d4b..5ae993f3705550d28fe1e00f550e538fa1680bac 100644
>--- a/Source/WebCore/rendering/style/StyleRareInheritedData.h
>+++ b/Source/WebCore/rendering/style/StyleRareInheritedData.h
>@@ -32,7 +32,7 @@
> #include "TextDecorationThickness.h"
> #include "TextUnderlineOffset.h"
> #include <wtf/RefCounted.h>
>-#include <wtf/text/AtomicString.h>
>+#include <wtf/text/AtomString.h>
> 
> #if ENABLE(TEXT_AUTOSIZING)
> #include "TextSizeAdjustment.h"
>@@ -163,16 +163,16 @@ public:
> Color visitedLinkStrokeColor;
> float miterLimit;
> 
>- AtomicString hyphenationString;
>+ AtomString hyphenationString;
> short hyphenationLimitBefore;
> short hyphenationLimitAfter;
> short hyphenationLimitLines;
> 
>- AtomicString textEmphasisCustomMark;
>+ AtomString textEmphasisCustomMark;
> RefPtr<QuotesData> quotes;
> DataRef<StyleFilterData> appleColorFilter;
> 
>- AtomicString lineGrid;
>+ AtomString lineGrid;
> TabSize tabSize;
> 
> #if ENABLE(TEXT_AUTOSIZING)
>diff --git a/Source/WebCore/rendering/svg/RenderSVGResourceContainer.h b/Source/WebCore/rendering/svg/RenderSVGResourceContainer.h
>index f637b714da5b9c9adb70e861c830753a17bcc41c..894b57dd5123bb55c5d9ef67431281ac61f1ee78 100644
>--- a/Source/WebCore/rendering/svg/RenderSVGResourceContainer.h
>+++ b/Source/WebCore/rendering/svg/RenderSVGResourceContainer.h
>@@ -70,14 +70,14 @@ private:
> void willBeDestroyed() final;
> void registerResource();
> 
>- AtomicString m_id;
>+ AtomString m_id;
> HashSet<RenderElement*> m_clients;
> HashSet<RenderLayer*> m_clientLayers;
> bool m_registered { false };
> bool m_isInvalidating { false };
> };
> 
>-inline RenderSVGResourceContainer* getRenderSVGResourceContainerById(Document& document, const AtomicString& id)
>+inline RenderSVGResourceContainer* getRenderSVGResourceContainerById(Document& document, const AtomString& id)
> {
> if (id.isEmpty())
> return nullptr;
>@@ -89,7 +89,7 @@ inline RenderSVGResourceContainer* getRenderSVGResourceContainerById(Document& d
> }
> 
> template<typename Renderer>
>-Renderer* getRenderSVGResourceById(Document& document, const AtomicString& id)
>+Renderer* getRenderSVGResourceById(Document& document, const AtomString& id)
> {
> // Using the RenderSVGResource type here avoids ambiguous casts for types that
> // descend from both RenderObject and RenderSVGResourceContainer.
>diff --git a/Source/WebCore/rendering/svg/SVGPathData.cpp b/Source/WebCore/rendering/svg/SVGPathData.cpp
>index fe97674386143a583ae110d6f7e598fb82948163..0f8499e53b0305ad008cea43818f3d71defece56 100644
>--- a/Source/WebCore/rendering/svg/SVGPathData.cpp
>+++ b/Source/WebCore/rendering/svg/SVGPathData.cpp
>@@ -174,9 +174,9 @@ Path pathFromGraphicsElement(const SVGElement* element)
> ASSERT(element);
> 
> typedef Path (*PathFromFunction)(const SVGElement&);
>- static HashMap<AtomicStringImpl*, PathFromFunction>* map = 0;
>+ static HashMap<AtomStringImpl*, PathFromFunction>* map = 0;
> if (!map) {
>- map = new HashMap<AtomicStringImpl*, PathFromFunction>;
>+ map = new HashMap<AtomStringImpl*, PathFromFunction>;
> map->set(SVGNames::circleTag->localName().impl(), pathFromCircleElement);
> map->set(SVGNames::ellipseTag->localName().impl(), pathFromEllipseElement);
> map->set(SVGNames::lineTag->localName().impl(), pathFromLineElement);
>diff --git a/Source/WebCore/rendering/svg/SVGRenderTreeAsText.cpp b/Source/WebCore/rendering/svg/SVGRenderTreeAsText.cpp
>index b462b2cfe9ea27a32d00d6787fe27a41b3fe707d..cc4f068ae4beddbcba5999e2acd8fdfb1328638a 100644
>--- a/Source/WebCore/rendering/svg/SVGRenderTreeAsText.cpp
>+++ b/Source/WebCore/rendering/svg/SVGRenderTreeAsText.cpp
>@@ -408,7 +408,7 @@ void writeSVGResourceContainer(TextStream& ts, const RenderSVGResourceContainer&
> {
> writeStandardPrefix(ts, resource, behavior);
> 
>- const AtomicString& id = resource.element().getIdAttribute();
>+ const AtomString& id = resource.element().getIdAttribute();
> writeNameAndQuotedValue(ts, "id", id); 
> 
> if (resource.resourceType() == MaskerResourceType) {
>@@ -578,7 +578,7 @@ void writeResources(TextStream& ts, const RenderObject& renderer, OptionSet<Rend
> const FilterOperation& filterOperation = *filterOperations.at(0);
> if (filterOperation.type() == FilterOperation::REFERENCE) {
> const auto& referenceFilterOperation = downcast<ReferenceFilterOperation>(filterOperation);
>- AtomicString id = SVGURIReference::fragmentIdentifierFromIRIString(referenceFilterOperation.url(), renderer.document());
>+ AtomString id = SVGURIReference::fragmentIdentifierFromIRIString(referenceFilterOperation.url(), renderer.document());
> if (RenderSVGResourceFilter* filter = getRenderSVGResourceById<RenderSVGResourceFilter>(renderer.document(), id)) {
> ts << indent << " ";
> writeNameAndQuotedValue(ts, "filter", id);
>diff --git a/Source/WebCore/rendering/svg/SVGResources.cpp b/Source/WebCore/rendering/svg/SVGResources.cpp
>index 2b06517ad75828a78a3b0ea2e67caab92c559ad0..bf786443ddd60d621bcd579b8770edcd91d29fa9 100644
>--- a/Source/WebCore/rendering/svg/SVGResources.cpp
>+++ b/Source/WebCore/rendering/svg/SVGResources.cpp
>@@ -43,9 +43,9 @@ SVGResources::SVGResources()
> {
> }
> 
>-static HashSet<AtomicString>& clipperFilterMaskerTags()
>+static HashSet<AtomString>& clipperFilterMaskerTags()
> {
>- static NeverDestroyed<HashSet<AtomicString>> s_tagList;
>+ static NeverDestroyed<HashSet<AtomString>> s_tagList;
> if (s_tagList.get().isEmpty()) {
> // "container elements": http://www.w3.org/TR/SVG11/intro.html#TermContainerElement
> // "graphics elements" : http://www.w3.org/TR/SVG11/intro.html#TermGraphicsElement
>@@ -92,9 +92,9 @@ static HashSet<AtomicString>& clipperFilterMaskerTags()
> return s_tagList;
> }
> 
>-static HashSet<AtomicString>& markerTags()
>+static HashSet<AtomString>& markerTags()
> {
>- static NeverDestroyed<HashSet<AtomicString>> s_tagList;
>+ static NeverDestroyed<HashSet<AtomString>> s_tagList;
> if (s_tagList.get().isEmpty()) {
> s_tagList.get().add(SVGNames::lineTag->localName());
> s_tagList.get().add(SVGNames::pathTag->localName());
>@@ -105,9 +105,9 @@ static HashSet<AtomicString>& markerTags()
> return s_tagList;
> }
> 
>-static HashSet<AtomicString>& fillAndStrokeTags()
>+static HashSet<AtomString>& fillAndStrokeTags()
> {
>- static NeverDestroyed<HashSet<AtomicString>> s_tagList;
>+ static NeverDestroyed<HashSet<AtomString>> s_tagList;
> if (s_tagList.get().isEmpty()) {
> s_tagList.get().add(SVGNames::altGlyphTag->localName());
> s_tagList.get().add(SVGNames::circleTag->localName());
>@@ -126,9 +126,9 @@ static HashSet<AtomicString>& fillAndStrokeTags()
> return s_tagList;
> }
> 
>-static HashSet<AtomicString>& chainableResourceTags()
>+static HashSet<AtomString>& chainableResourceTags()
> {
>- static NeverDestroyed<HashSet<AtomicString>> s_tagList;
>+ static NeverDestroyed<HashSet<AtomString>> s_tagList;
> if (s_tagList.get().isEmpty()) {
> s_tagList.get().add(SVGNames::linearGradientTag->localName());
> s_tagList.get().add(SVGNames::filterTag->localName());
>@@ -169,7 +169,7 @@ static inline bool isChainableResource(const SVGElement& element, const SVGEleme
> return false;
> }
> 
>-static inline RenderSVGResourceContainer* paintingResourceFromSVGPaint(Document& document, const SVGPaintType& paintType, const String& paintUri, AtomicString& id, bool& hasPendingResource)
>+static inline RenderSVGResourceContainer* paintingResourceFromSVGPaint(Document& document, const SVGPaintType& paintType, const String& paintUri, AtomString& id, bool& hasPendingResource)
> {
> if (paintType != SVGPaintType::URI && paintType != SVGPaintType::URIRGBColor && paintType != SVGPaintType::URICurrentColor)
> return nullptr;
>@@ -188,7 +188,7 @@ static inline RenderSVGResourceContainer* paintingResourceFromSVGPaint(Document&
> return container;
> }
> 
>-static inline void registerPendingResource(SVGDocumentExtensions& extensions, const AtomicString& id, SVGElement& element)
>+static inline void registerPendingResource(SVGDocumentExtensions& extensions, const AtomString& id, SVGElement& element)
> {
> extensions.addPendingResource(id, element);
> }
>@@ -207,7 +207,7 @@ bool SVGResources::buildCachedResources(const RenderElement& renderer, const Ren
> 
> SVGDocumentExtensions& extensions = document.accessSVGExtensions();
> 
>- const AtomicString& tagName = element.localName();
>+ const AtomString& tagName = element.localName();
> if (tagName.isNull())
> return false;
> 
>@@ -216,7 +216,7 @@ bool SVGResources::buildCachedResources(const RenderElement& renderer, const Ren
> bool foundResources = false;
> if (clipperFilterMaskerTags().contains(tagName)) {
> if (svgStyle.hasClipper()) {
>- AtomicString id(svgStyle.clipperResource());
>+ AtomString id(svgStyle.clipperResource());
> if (setClipper(getRenderSVGResourceById<RenderSVGResourceClipper>(document, id)))
> foundResources = true;
> else
>@@ -225,7 +225,7 @@ bool SVGResources::buildCachedResources(const RenderElement& renderer, const Ren
> // FIXME: -webkit-clip-path should support external resources
> // https://bugs.webkit.org/show_bug.cgi?id=127032
> auto& clipPath = downcast<ReferenceClipPathOperation>(*style.clipPath());
>- AtomicString id(clipPath.fragment());
>+ AtomString id(clipPath.fragment());
> if (setClipper(getRenderSVGResourceById<RenderSVGResourceClipper>(document, id)))
> foundResources = true;
> else
>@@ -238,7 +238,7 @@ bool SVGResources::buildCachedResources(const RenderElement& renderer, const Ren
> const FilterOperation& filterOperation = *filterOperations.at(0);
> if (filterOperation.type() == FilterOperation::REFERENCE) {
> const auto& referenceFilterOperation = downcast<ReferenceFilterOperation>(filterOperation);
>- AtomicString id = SVGURIReference::fragmentIdentifierFromIRIString(referenceFilterOperation.url(), element.document());
>+ AtomString id = SVGURIReference::fragmentIdentifierFromIRIString(referenceFilterOperation.url(), element.document());
> if (setFilter(getRenderSVGResourceById<RenderSVGResourceFilter>(document, id)))
> foundResources = true;
> else
>@@ -248,7 +248,7 @@ bool SVGResources::buildCachedResources(const RenderElement& renderer, const Ren
> }
> 
> if (svgStyle.hasMasker()) {
>- AtomicString id(svgStyle.maskerResource());
>+ AtomString id(svgStyle.maskerResource());
> if (setMasker(getRenderSVGResourceById<RenderSVGResourceMasker>(document, id)))
> foundResources = true;
> else
>@@ -257,19 +257,19 @@ bool SVGResources::buildCachedResources(const RenderElement& renderer, const Ren
> }
> 
> if (markerTags().contains(tagName) && svgStyle.hasMarkers()) {
>- AtomicString markerStartId(svgStyle.markerStartResource());
>+ AtomString markerStartId(svgStyle.markerStartResource());
> if (setMarkerStart(getRenderSVGResourceById<RenderSVGResourceMarker>(document, markerStartId)))
> foundResources = true;
> else
> registerPendingResource(extensions, markerStartId, element);
> 
>- AtomicString markerMidId(svgStyle.markerMidResource());
>+ AtomString markerMidId(svgStyle.markerMidResource());
> if (setMarkerMid(getRenderSVGResourceById<RenderSVGResourceMarker>(document, markerMidId)))
> foundResources = true;
> else
> registerPendingResource(extensions, markerMidId, element);
> 
>- AtomicString markerEndId(svgStyle.markerEndResource());
>+ AtomString markerEndId(svgStyle.markerEndResource());
> if (setMarkerEnd(getRenderSVGResourceById<RenderSVGResourceMarker>(document, markerEndId)))
> foundResources = true;
> else
>@@ -279,7 +279,7 @@ bool SVGResources::buildCachedResources(const RenderElement& renderer, const Ren
> if (fillAndStrokeTags().contains(tagName)) {
> if (svgStyle.hasFill()) {
> bool hasPendingResource = false;
>- AtomicString id;
>+ AtomString id;
> if (setFill(paintingResourceFromSVGPaint(document, svgStyle.fillPaintType(), svgStyle.fillPaintUri(), id, hasPendingResource)))
> foundResources = true;
> else if (hasPendingResource)
>@@ -288,7 +288,7 @@ bool SVGResources::buildCachedResources(const RenderElement& renderer, const Ren
> 
> if (svgStyle.hasStroke()) {
> bool hasPendingResource = false;
>- AtomicString id;
>+ AtomString id;
> if (setStroke(paintingResourceFromSVGPaint(document, svgStyle.strokePaintType(), svgStyle.strokePaintUri(), id, hasPendingResource)))
> foundResources = true;
> else if (hasPendingResource)
>@@ -297,7 +297,7 @@ bool SVGResources::buildCachedResources(const RenderElement& renderer, const Ren
> }
> 
> if (chainableResourceTags().contains(tagName)) {
>- AtomicString id(targetReferenceFromResource(element));
>+ AtomString id(targetReferenceFromResource(element));
> auto* linkedResource = getRenderSVGResourceContainerById(document, id);
> if (!linkedResource)
> registerPendingResource(extensions, id, element);
>diff --git a/Source/WebCore/storage/Storage.cpp b/Source/WebCore/storage/Storage.cpp
>index 0863f087ee07e7d5b3d73eab43d521ac94a3b974..47dbb17d9ae6d269c14703a1a62a492ee66df416 100644
>--- a/Source/WebCore/storage/Storage.cpp
>+++ b/Source/WebCore/storage/Storage.cpp
>@@ -117,11 +117,11 @@ bool Storage::isSupportedPropertyName(const String& propertyName) const
> return m_storageArea->contains(propertyName);
> }
> 
>-Vector<AtomicString> Storage::supportedPropertyNames() const
>+Vector<AtomString> Storage::supportedPropertyNames() const
> {
> unsigned length = m_storageArea->length();
> 
>- Vector<AtomicString> result;
>+ Vector<AtomString> result;
> result.reserveInitialCapacity(length);
> 
> for (unsigned i = 0; i < length; ++i)
>diff --git a/Source/WebCore/storage/Storage.h b/Source/WebCore/storage/Storage.h
>index f3b2caed11dfe0091a9fc14748d5ee983e60af45..28aa9ab14e1b22acc5bc5b4f6e1c84c1a974f660 100644
>--- a/Source/WebCore/storage/Storage.h
>+++ b/Source/WebCore/storage/Storage.h
>@@ -49,7 +49,7 @@ public:
> 
> // Bindings support functions.
> bool isSupportedPropertyName(const String&) const;
>- Vector<AtomicString> supportedPropertyNames() const;
>+ Vector<AtomString> supportedPropertyNames() const;
> 
> StorageArea& area() const { return m_storageArea.get(); }
> 
>diff --git a/Source/WebCore/storage/StorageEvent.cpp b/Source/WebCore/storage/StorageEvent.cpp
>index c7068afd9863acda7ca4111dcae001591a99ecf1..f667156ede25db7cdabc90b76d364336812e09e6 100644
>--- a/Source/WebCore/storage/StorageEvent.cpp
>+++ b/Source/WebCore/storage/StorageEvent.cpp
>@@ -39,17 +39,17 @@ StorageEvent::StorageEvent() = default;
> 
> StorageEvent::~StorageEvent() = default;
> 
>-Ref<StorageEvent> StorageEvent::create(const AtomicString& type, const String& key, const String& oldValue, const String& newValue, const String& url, Storage* storageArea)
>+Ref<StorageEvent> StorageEvent::create(const AtomString& type, const String& key, const String& oldValue, const String& newValue, const String& url, Storage* storageArea)
> {
> return adoptRef(*new StorageEvent(type, key, oldValue, newValue, url, storageArea));
> }
> 
>-Ref<StorageEvent> StorageEvent::create(const AtomicString& type, const Init& initializer, IsTrusted isTrusted)
>+Ref<StorageEvent> StorageEvent::create(const AtomString& type, const Init& initializer, IsTrusted isTrusted)
> {
> return adoptRef(*new StorageEvent(type, initializer, isTrusted));
> }
> 
>-StorageEvent::StorageEvent(const AtomicString& type, const String& key, const String& oldValue, const String& newValue, const String& url, Storage* storageArea)
>+StorageEvent::StorageEvent(const AtomString& type, const String& key, const String& oldValue, const String& newValue, const String& url, Storage* storageArea)
> : Event(type, CanBubble::No, IsCancelable::No)
> , m_key(key)
> , m_oldValue(oldValue)
>@@ -59,7 +59,7 @@ StorageEvent::StorageEvent(const AtomicString& type, const String& key, const St
> {
> }
> 
>-StorageEvent::StorageEvent(const AtomicString& type, const Init& initializer, IsTrusted isTrusted)
>+StorageEvent::StorageEvent(const AtomString& type, const Init& initializer, IsTrusted isTrusted)
> : Event(type, initializer, isTrusted)
> , m_key(initializer.key)
> , m_oldValue(initializer.oldValue)
>@@ -69,7 +69,7 @@ StorageEvent::StorageEvent(const AtomicString& type, const Init& initializer, Is
> {
> }
> 
>-void StorageEvent::initStorageEvent(const AtomicString& type, bool canBubble, bool cancelable, const String& key, const String& oldValue, const String& newValue, const String& url, Storage* storageArea)
>+void StorageEvent::initStorageEvent(const AtomString& type, bool canBubble, bool cancelable, const String& key, const String& oldValue, const String& newValue, const String& url, Storage* storageArea)
> {
> if (isBeingDispatched())
> return;
>diff --git a/Source/WebCore/storage/StorageEvent.h b/Source/WebCore/storage/StorageEvent.h
>index ac18aac9f8f38e5ffc8922cfec7fa4363665f3b2..c2b32c63dc1dad13edc3d6d2b14582ba55fd5bdd 100644
>--- a/Source/WebCore/storage/StorageEvent.h
>+++ b/Source/WebCore/storage/StorageEvent.h
>@@ -34,7 +34,7 @@ class Storage;
> 
> class StorageEvent : public Event {
> public:
>- static Ref<StorageEvent> create(const AtomicString& type, const String& key, const String& oldValue, const String& newValue, const String& url, Storage* storageArea);
>+ static Ref<StorageEvent> create(const AtomString& type, const String& key, const String& oldValue, const String& newValue, const String& url, Storage* storageArea);
> static Ref<StorageEvent> createForBindings();
> 
> struct Init : EventInit {
>@@ -45,7 +45,7 @@ public:
> RefPtr<Storage> storageArea;
> };
> 
>- static Ref<StorageEvent> create(const AtomicString&, const Init&, IsTrusted = IsTrusted::No);
>+ static Ref<StorageEvent> create(const AtomString&, const Init&, IsTrusted = IsTrusted::No);
> virtual ~StorageEvent();
> 
> const String& key() const { return m_key; }
>@@ -54,7 +54,7 @@ public:
> const String& url() const { return m_url; }
> Storage* storageArea() const { return m_storageArea.get(); }
> 
>- void initStorageEvent(const AtomicString& type, bool canBubble, bool cancelable, const String& key, const String& oldValue, const String& newValue, const String& url, Storage* storageArea);
>+ void initStorageEvent(const AtomString& type, bool canBubble, bool cancelable, const String& key, const String& oldValue, const String& newValue, const String& url, Storage* storageArea);
> 
> // Needed once we support init<blank>EventNS
> // void initStorageEventNS(in DOMString namespaceURI, in DOMString typeArg, in boolean canBubbleArg, in boolean cancelableArg, in DOMString keyArg, in DOMString oldValueArg, in DOMString newValueArg, in DOMString urlArg, Storage storageAreaArg);
>@@ -63,8 +63,8 @@ public:
> 
> private:
> StorageEvent();
>- StorageEvent(const AtomicString& type, const String& key, const String& oldValue, const String& newValue, const String& url, Storage* storageArea);
>- StorageEvent(const AtomicString&, const Init&, IsTrusted);
>+ StorageEvent(const AtomString& type, const String& key, const String& oldValue, const String& newValue, const String& url, Storage* storageArea);
>+ StorageEvent(const AtomString&, const Init&, IsTrusted);
> 
> String m_key;
> String m_oldValue;
>diff --git a/Source/WebCore/style/AttributeChangeInvalidation.cpp b/Source/WebCore/style/AttributeChangeInvalidation.cpp
>index be8e5bf265d77fdd3a8d8c2891c7c6ca292224ae..491ba2dab4636089ad5b8915ed0ce411cf022eec 100644
>--- a/Source/WebCore/style/AttributeChangeInvalidation.cpp
>+++ b/Source/WebCore/style/AttributeChangeInvalidation.cpp
>@@ -39,7 +39,7 @@ static bool mayBeAffectedByAttributeChange(const RuleFeatureSet& features, bool
> return nameSet.contains(attributeName.localName());
> }
> 
>-void AttributeChangeInvalidation::invalidateStyle(const QualifiedName& attributeName, const AtomicString& oldValue, const AtomicString& newValue)
>+void AttributeChangeInvalidation::invalidateStyle(const QualifiedName& attributeName, const AtomString& oldValue, const AtomString& newValue)
> {
> if (newValue == oldValue)
> return;
>diff --git a/Source/WebCore/style/AttributeChangeInvalidation.h b/Source/WebCore/style/AttributeChangeInvalidation.h
>index 017e387c78d4d08581e270ee1c4b2699c0b0582e..cac7159ddccb51bb55a8af298f94a775b13dd5b9 100644
>--- a/Source/WebCore/style/AttributeChangeInvalidation.h
>+++ b/Source/WebCore/style/AttributeChangeInvalidation.h
>@@ -35,11 +35,11 @@ namespace Style {
> 
> class AttributeChangeInvalidation {
> public:
>- AttributeChangeInvalidation(Element&, const QualifiedName&, const AtomicString& oldValue, const AtomicString& newValue);
>+ AttributeChangeInvalidation(Element&, const QualifiedName&, const AtomString& oldValue, const AtomString& newValue);
> ~AttributeChangeInvalidation();
> 
> private:
>- void invalidateStyle(const QualifiedName&, const AtomicString& oldValue, const AtomicString& newValue);
>+ void invalidateStyle(const QualifiedName&, const AtomString& oldValue, const AtomString& newValue);
> void invalidateStyleWithRuleSets();
> 
> const bool m_isEnabled;
>@@ -48,7 +48,7 @@ private:
> Vector<const InvalidationRuleSet*, 4> m_invalidationRuleSets;
> };
> 
>-inline AttributeChangeInvalidation::AttributeChangeInvalidation(Element& element, const QualifiedName& attributeName, const AtomicString& oldValue, const AtomicString& newValue)
>+inline AttributeChangeInvalidation::AttributeChangeInvalidation(Element& element, const QualifiedName& attributeName, const AtomString& oldValue, const AtomString& newValue)
> : m_isEnabled(element.needsStyleInvalidation())
> , m_element(element)
> {
>diff --git a/Source/WebCore/style/ClassChangeInvalidation.cpp b/Source/WebCore/style/ClassChangeInvalidation.cpp
>index cd30dc736fe6efe32728c3797c2cdc6f388805a9..c90ac33a6d99da6e73f8afdc727752fcadb53856 100644
>--- a/Source/WebCore/style/ClassChangeInvalidation.cpp
>+++ b/Source/WebCore/style/ClassChangeInvalidation.cpp
>@@ -35,7 +35,7 @@
> namespace WebCore {
> namespace Style {
> 
>-using ClassChangeVector = Vector<AtomicStringImpl*, 4>;
>+using ClassChangeVector = Vector<AtomStringImpl*, 4>;
> 
> static ClassChangeVector collectClasses(const SpaceSplitString& classes)
> {
>diff --git a/Source/WebCore/style/IdChangeInvalidation.cpp b/Source/WebCore/style/IdChangeInvalidation.cpp
>index 9691a8d3e12e650a8b0138c69b09b49cf9168223..8bee5eb7c39e1aab2f54c815bc917e2885937563 100644
>--- a/Source/WebCore/style/IdChangeInvalidation.cpp
>+++ b/Source/WebCore/style/IdChangeInvalidation.cpp
>@@ -32,7 +32,7 @@
> namespace WebCore {
> namespace Style {
> 
>-void IdChangeInvalidation::invalidateStyle(const AtomicString& changedId)
>+void IdChangeInvalidation::invalidateStyle(const AtomString& changedId)
> {
> if (changedId.isEmpty())
> return;
>diff --git a/Source/WebCore/style/IdChangeInvalidation.h b/Source/WebCore/style/IdChangeInvalidation.h
>index 0e3bdef9b3d7cdb7e70d57bcaeafd9a66374c81d..436194d4e886f25346fd64ee26c1e44e8231f3a0 100644
>--- a/Source/WebCore/style/IdChangeInvalidation.h
>+++ b/Source/WebCore/style/IdChangeInvalidation.h
>@@ -33,19 +33,19 @@ namespace Style {
> 
> class IdChangeInvalidation {
> public:
>- IdChangeInvalidation(Element&, const AtomicString& oldId, const AtomicString& newId);
>+ IdChangeInvalidation(Element&, const AtomString& oldId, const AtomString& newId);
> ~IdChangeInvalidation();
> 
> private:
>- void invalidateStyle(const AtomicString&);
>+ void invalidateStyle(const AtomString&);
> 
> const bool m_isEnabled;
> Element& m_element;
> 
>- AtomicString m_newId;
>+ AtomString m_newId;
> };
> 
>-inline IdChangeInvalidation::IdChangeInvalidation(Element& element, const AtomicString& oldId, const AtomicString& newId)
>+inline IdChangeInvalidation::IdChangeInvalidation(Element& element, const AtomString& oldId, const AtomString& newId)
> : m_isEnabled(element.needsStyleInvalidation())
> , m_element(element)
> {
>diff --git a/Source/WebCore/style/StyleScope.cpp b/Source/WebCore/style/StyleScope.cpp
>index a4fe9a2586278cd5731c67bfde7dbe241ee1d306..9f0d1ad7490bfeab2407ce7bc88b095116d0b222 100644
>--- a/Source/WebCore/style/StyleScope.cpp
>+++ b/Source/WebCore/style/StyleScope.cpp
>@@ -328,7 +328,7 @@ void Scope::collectActiveStyleSheets(Vector<RefPtr<StyleSheet>>& sheets)
> sheet = downcast<ProcessingInstruction>(*node).sheet();
> } else if (is<HTMLLinkElement>(*node) || is<HTMLStyleElement>(*node) || is<SVGStyleElement>(*node)) {
> Element& element = downcast<Element>(*node);
>- AtomicString title = element.isInShadowTree() ? nullAtom() : element.attributeWithoutSynchronization(titleAttr);
>+ AtomString title = element.isInShadowTree() ? nullAtom() : element.attributeWithoutSynchronization(titleAttr);
> bool enabledViaScript = false;
> if (is<HTMLLinkElement>(element)) {
> // <LINK> element
>diff --git a/Source/WebCore/svg/SVGAElement.cpp b/Source/WebCore/svg/SVGAElement.cpp
>index d4619504e2b6c2d041d08014b32e9aff626eef3a..3dd3f3b63be232f0ea9e10bfe69d996378228d4b 100644
>--- a/Source/WebCore/svg/SVGAElement.cpp
>+++ b/Source/WebCore/svg/SVGAElement.cpp
>@@ -67,7 +67,7 @@ Ref<SVGAElement> SVGAElement::create(const QualifiedName& tagName, Document& doc
> String SVGAElement::title() const
> {
> // If the xlink:title is set (non-empty string), use it.
>- const AtomicString& title = attributeWithoutSynchronization(XLinkNames::titleAttr);
>+ const AtomString& title = attributeWithoutSynchronization(XLinkNames::titleAttr);
> if (!title.isEmpty())
> return title;
> 
>@@ -75,7 +75,7 @@ String SVGAElement::title() const
> return SVGElement::title();
> }
> 
>-void SVGAElement::parseAttribute(const QualifiedName& name, const AtomicString& value)
>+void SVGAElement::parseAttribute(const QualifiedName& name, const AtomString& value)
> {
> if (name == SVGNames::targetAttr) {
> m_target->setBaseValInternal(value);
>diff --git a/Source/WebCore/svg/SVGAElement.h b/Source/WebCore/svg/SVGAElement.h
>index 7e1d2946704e6755be34e40e798474fb14c701c6..b046e3be523691d7647338656600e982847dc1b4 100644
>--- a/Source/WebCore/svg/SVGAElement.h
>+++ b/Source/WebCore/svg/SVGAElement.h
>@@ -45,7 +45,7 @@ private:
> using PropertyRegistry = SVGPropertyOwnerRegistry<SVGAElement, SVGGraphicsElement, SVGExternalResourcesRequired, SVGURIReference>;
> const SVGPropertyRegistry& propertyRegistry() const final { return m_propertyRegistry; }
> 
>- void parseAttribute(const QualifiedName&, const AtomicString&) final;
>+ void parseAttribute(const QualifiedName&, const AtomString&) final;
> void svgAttributeChanged(const QualifiedName&) final;
> 
> RenderPtr<RenderElement> createElementRenderer(RenderStyle&&, const RenderTreePosition&) final;
>diff --git a/Source/WebCore/svg/SVGAltGlyphElement.cpp b/Source/WebCore/svg/SVGAltGlyphElement.cpp
>index 95efcb279b1686a08be6f29fe7e6e9930c381647..9a9c7c71a4a16039c0718fe7069e3a83bd3d9a54 100644
>--- a/Source/WebCore/svg/SVGAltGlyphElement.cpp
>+++ b/Source/WebCore/svg/SVGAltGlyphElement.cpp
>@@ -49,22 +49,22 @@ Ref<SVGAltGlyphElement> SVGAltGlyphElement::create(const QualifiedName& tagName,
> return adoptRef(*new SVGAltGlyphElement(tagName, document));
> }
> 
>-ExceptionOr<void> SVGAltGlyphElement::setGlyphRef(const AtomicString&)
>+ExceptionOr<void> SVGAltGlyphElement::setGlyphRef(const AtomString&)
> {
> return Exception { NoModificationAllowedError };
> }
> 
>-const AtomicString& SVGAltGlyphElement::glyphRef() const
>+const AtomString& SVGAltGlyphElement::glyphRef() const
> {
> return attributeWithoutSynchronization(SVGNames::glyphRefAttr);
> }
> 
>-ExceptionOr<void> SVGAltGlyphElement::setFormat(const AtomicString&)
>+ExceptionOr<void> SVGAltGlyphElement::setFormat(const AtomString&)
> {
> return Exception { NoModificationAllowedError };
> }
> 
>-const AtomicString& SVGAltGlyphElement::format() const
>+const AtomString& SVGAltGlyphElement::format() const
> {
> return attributeWithoutSynchronization(SVGNames::formatAttr);
> }
>diff --git a/Source/WebCore/svg/SVGAltGlyphElement.h b/Source/WebCore/svg/SVGAltGlyphElement.h
>index 5d902f6756c39c7a2cfe7830fc448251907e07e0..4ed82595954648add41b3a02c46fe81c9824a892 100644
>--- a/Source/WebCore/svg/SVGAltGlyphElement.h
>+++ b/Source/WebCore/svg/SVGAltGlyphElement.h
>@@ -35,10 +35,10 @@ class SVGAltGlyphElement final : public SVGTextPositioningElement, public SVGURI
> public:
> static Ref<SVGAltGlyphElement> create(const QualifiedName&, Document&);
> 
>- const AtomicString& glyphRef() const;
>- ExceptionOr<void> setGlyphRef(const AtomicString&);
>- const AtomicString& format() const;
>- ExceptionOr<void> setFormat(const AtomicString&);
>+ const AtomString& glyphRef() const;
>+ ExceptionOr<void> setGlyphRef(const AtomString&);
>+ const AtomString& format() const;
>+ ExceptionOr<void> setFormat(const AtomString&);
> 
> bool hasValidGlyphElements(Vector<String>& glyphNames) const;
> 
>diff --git a/Source/WebCore/svg/SVGAnimateMotionElement.cpp b/Source/WebCore/svg/SVGAnimateMotionElement.cpp
>index 8ec41b7804b653cba9903b1dd324ae92b50631ef..1dac660050fa26ffe9c8b3d6c8c679e25062c49d 100644
>--- a/Source/WebCore/svg/SVGAnimateMotionElement.cpp
>+++ b/Source/WebCore/svg/SVGAnimateMotionElement.cpp
>@@ -96,7 +96,7 @@ bool SVGAnimateMotionElement::hasValidAttributeName() const
> return true;
> }
> 
>-void SVGAnimateMotionElement::parseAttribute(const QualifiedName& name, const AtomicString& value)
>+void SVGAnimateMotionElement::parseAttribute(const QualifiedName& name, const AtomString& value)
> {
> if (name == SVGNames::pathAttr) {
> m_path = buildPathFromString(value);
>@@ -109,9 +109,9 @@ void SVGAnimateMotionElement::parseAttribute(const QualifiedName& name, const At
> 
> SVGAnimateMotionElement::RotateMode SVGAnimateMotionElement::rotateMode() const
> {
>- static NeverDestroyed<const AtomicString> autoVal("auto", AtomicString::ConstructFromLiteral);
>- static NeverDestroyed<const AtomicString> autoReverse("auto-reverse", AtomicString::ConstructFromLiteral);
>- const AtomicString& rotate = getAttribute(SVGNames::rotateAttr);
>+ static NeverDestroyed<const AtomString> autoVal("auto", AtomString::ConstructFromLiteral);
>+ static NeverDestroyed<const AtomString> autoReverse("auto-reverse", AtomString::ConstructFromLiteral);
>+ const AtomString& rotate = getAttribute(SVGNames::rotateAttr);
> if (rotate == autoVal)
> return RotateAuto;
> if (rotate == autoReverse)
>diff --git a/Source/WebCore/svg/SVGAnimateMotionElement.h b/Source/WebCore/svg/SVGAnimateMotionElement.h
>index 2a90d3b81a4719f0bc93186248bc93988fc405be..fabaac5d7c3372ae6a8d53da95cd6b7f350af2a4 100644
>--- a/Source/WebCore/svg/SVGAnimateMotionElement.h
>+++ b/Source/WebCore/svg/SVGAnimateMotionElement.h
>@@ -39,7 +39,7 @@ private:
> bool hasValidAttributeType() const override;
> bool hasValidAttributeName() const override;
> 
>- void parseAttribute(const QualifiedName&, const AtomicString&) override;
>+ void parseAttribute(const QualifiedName&, const AtomString&) override;
> 
> void resetAnimatedType() override;
> void clearAnimatedType(SVGElement* targetElement) override;
>diff --git a/Source/WebCore/svg/SVGAnimateTransformElement.cpp b/Source/WebCore/svg/SVGAnimateTransformElement.cpp
>index ad750aef787966dcd6539e2768924a9b27fa952c..a5cd113c3aa9e262f58f7a377d9a2bd4dff63d7c 100644
>--- a/Source/WebCore/svg/SVGAnimateTransformElement.cpp
>+++ b/Source/WebCore/svg/SVGAnimateTransformElement.cpp
>@@ -54,7 +54,7 @@ bool SVGAnimateTransformElement::hasValidAttributeType() const
> return SVGAnimateElementBase::hasValidAttributeType();
> }
> 
>-void SVGAnimateTransformElement::parseAttribute(const QualifiedName& name, const AtomicString& value)
>+void SVGAnimateTransformElement::parseAttribute(const QualifiedName& name, const AtomString& value)
> {
> if (name == SVGNames::typeAttr) {
> m_type = SVGTransformable::parseTransformType(value);
>diff --git a/Source/WebCore/svg/SVGAnimateTransformElement.h b/Source/WebCore/svg/SVGAnimateTransformElement.h
>index 301ea88ab465d547b12db81b3a1b65537e529b7a..98da70e26d6f8412333f2bd13feb0194011a0961 100644
>--- a/Source/WebCore/svg/SVGAnimateTransformElement.h
>+++ b/Source/WebCore/svg/SVGAnimateTransformElement.h
>@@ -40,7 +40,7 @@ private:
> SVGAnimateTransformElement(const QualifiedName&, Document&);
> 
> bool hasValidAttributeType() const final;
>- void parseAttribute(const QualifiedName&, const AtomicString&) final;
>+ void parseAttribute(const QualifiedName&, const AtomString&) final;
> String animateRangeString(const String&) const final;
> 
> SVGTransformValue::SVGTransformType m_type;
>diff --git a/Source/WebCore/svg/SVGAnimationElement.cpp b/Source/WebCore/svg/SVGAnimationElement.cpp
>index 542428bd98115fdbe810c78ada86cf28e153365e..b8b51f16f422999ed01ae693917e9db267b167b5 100644
>--- a/Source/WebCore/svg/SVGAnimationElement.cpp
>+++ b/Source/WebCore/svg/SVGAnimationElement.cpp
>@@ -153,7 +153,7 @@ bool SVGAnimationElement::isSupportedAttribute(const QualifiedName& attrName)
> return supportedAttributes.get().contains<SVGAttributeHashTranslator>(attrName);
> }
> 
>-void SVGAnimationElement::parseAttribute(const QualifiedName& name, const AtomicString& value)
>+void SVGAnimationElement::parseAttribute(const QualifiedName& name, const AtomString& value)
> {
> if (name == SVGNames::valuesAttr) {
> // Per the SMIL specification, leading and trailing white space,
>@@ -277,12 +277,12 @@ void SVGAnimationElement::updateAnimationMode()
> setAnimationMode(AnimationMode::None);
> }
> 
>-void SVGAnimationElement::setCalcMode(const AtomicString& calcMode)
>+void SVGAnimationElement::setCalcMode(const AtomString& calcMode)
> {
>- static NeverDestroyed<const AtomicString> discrete("discrete", AtomicString::ConstructFromLiteral);
>- static NeverDestroyed<const AtomicString> linear("linear", AtomicString::ConstructFromLiteral);
>- static NeverDestroyed<const AtomicString> paced("paced", AtomicString::ConstructFromLiteral);
>- static NeverDestroyed<const AtomicString> spline("spline", AtomicString::ConstructFromLiteral);
>+ static NeverDestroyed<const AtomString> discrete("discrete", AtomString::ConstructFromLiteral);
>+ static NeverDestroyed<const AtomString> linear("linear", AtomString::ConstructFromLiteral);
>+ static NeverDestroyed<const AtomString> paced("paced", AtomString::ConstructFromLiteral);
>+ static NeverDestroyed<const AtomString> spline("spline", AtomString::ConstructFromLiteral);
> if (calcMode == discrete)
> setCalcMode(CalcMode::Discrete);
> else if (calcMode == linear)
>@@ -295,10 +295,10 @@ void SVGAnimationElement::setCalcMode(const AtomicString& calcMode)
> setCalcMode(hasTagName(SVGNames::animateMotionTag) ? CalcMode::Paced : CalcMode::Linear);
> }
> 
>-void SVGAnimationElement::setAttributeType(const AtomicString& attributeType)
>+void SVGAnimationElement::setAttributeType(const AtomString& attributeType)
> {
>- static NeverDestroyed<const AtomicString> css("CSS", AtomicString::ConstructFromLiteral);
>- static NeverDestroyed<const AtomicString> xml("XML", AtomicString::ConstructFromLiteral);
>+ static NeverDestroyed<const AtomString> css("CSS", AtomString::ConstructFromLiteral);
>+ static NeverDestroyed<const AtomString> xml("XML", AtomString::ConstructFromLiteral);
> if (attributeType == css)
> m_attributeType = AttributeType::CSS;
> else if (attributeType == xml)
>@@ -324,15 +324,15 @@ String SVGAnimationElement::fromValue() const
> 
> bool SVGAnimationElement::isAdditive() const
> {
>- static NeverDestroyed<const AtomicString> sum("sum", AtomicString::ConstructFromLiteral);
>- const AtomicString& value = attributeWithoutSynchronization(SVGNames::additiveAttr);
>+ static NeverDestroyed<const AtomString> sum("sum", AtomString::ConstructFromLiteral);
>+ const AtomString& value = attributeWithoutSynchronization(SVGNames::additiveAttr);
> return value == sum || animationMode() == AnimationMode::By;
> }
> 
> bool SVGAnimationElement::isAccumulated() const
> {
>- static NeverDestroyed<const AtomicString> sum("sum", AtomicString::ConstructFromLiteral);
>- const AtomicString& value = attributeWithoutSynchronization(SVGNames::accumulateAttr);
>+ static NeverDestroyed<const AtomString> sum("sum", AtomString::ConstructFromLiteral);
>+ const AtomString& value = attributeWithoutSynchronization(SVGNames::accumulateAttr);
> return value == sum && animationMode() != AnimationMode::To;
> }
> 
>@@ -609,7 +609,7 @@ void SVGAnimationElement::computeCSSPropertyValue(SVGElement* element, CSSProper
> 
> static bool inheritsFromProperty(SVGElement* targetElement, const QualifiedName& attributeName, const String& value)
> {
>- static NeverDestroyed<const AtomicString> inherit("inherit", AtomicString::ConstructFromLiteral);
>+ static NeverDestroyed<const AtomString> inherit("inherit", AtomString::ConstructFromLiteral);
> 
> if (value.isEmpty() || value != inherit)
> return false;
>diff --git a/Source/WebCore/svg/SVGAnimationElement.h b/Source/WebCore/svg/SVGAnimationElement.h
>index 54e9128129c792cf811e3d605756390f080afe35..aa53a0c54bf4d0b698564c579ab4f942542da531 100644
>--- a/Source/WebCore/svg/SVGAnimationElement.h
>+++ b/Source/WebCore/svg/SVGAnimationElement.h
>@@ -92,7 +92,7 @@ protected:
> virtual void resetAnimation();
> 
> static bool isSupportedAttribute(const QualifiedName&);
>- void parseAttribute(const QualifiedName&, const AtomicString&) override;
>+ void parseAttribute(const QualifiedName&, const AtomString&) override;
> void svgAttributeChanged(const QualifiedName&) override;
> 
> String toValue() const;
>@@ -116,7 +116,7 @@ protected:
> 
> private:
> void animationAttributeChanged() override;
>- void setAttributeType(const AtomicString&);
>+ void setAttributeType(const AtomString&);
> 
> virtual bool calculateToAtEndOfDurationValue(const String& toAtEndOfDurationString) = 0;
> virtual bool calculateFromAndToValues(const String& fromString, const String& toString) = 0;
>@@ -132,7 +132,7 @@ private:
> float calculatePercentForFromTo(float percent) const;
> unsigned calculateKeyTimesIndex(float percent) const;
> 
>- void setCalcMode(const AtomicString&);
>+ void setCalcMode(const AtomString&);
> 
> bool m_animationValid { false };
> 
>diff --git a/Source/WebCore/svg/SVGCircleElement.cpp b/Source/WebCore/svg/SVGCircleElement.cpp
>index 0be6827a161e44a81df15f125bef729cb7c71d19..d93040a1f56aaeff5c2921d46ab73db108ad78f4 100644
>--- a/Source/WebCore/svg/SVGCircleElement.cpp
>+++ b/Source/WebCore/svg/SVGCircleElement.cpp
>@@ -49,7 +49,7 @@ Ref<SVGCircleElement> SVGCircleElement::create(const QualifiedName& tagName, Doc
> return adoptRef(*new SVGCircleElement(tagName, document));
> }
> 
>-void SVGCircleElement::parseAttribute(const QualifiedName& name, const AtomicString& value)
>+void SVGCircleElement::parseAttribute(const QualifiedName& name, const AtomString& value)
> {
> SVGParsingError parseError = NoError;
> 
>diff --git a/Source/WebCore/svg/SVGCircleElement.h b/Source/WebCore/svg/SVGCircleElement.h
>index 5f90c70fa9d6bb02edb75470619c4f93248bf00c..720f310e640f82dbee6670643f79313b4f5efa85 100644
>--- a/Source/WebCore/svg/SVGCircleElement.h
>+++ b/Source/WebCore/svg/SVGCircleElement.h
>@@ -46,7 +46,7 @@ private:
> using PropertyRegistry = SVGPropertyOwnerRegistry<SVGCircleElement, SVGGeometryElement, SVGExternalResourcesRequired>;
> const SVGPropertyRegistry& propertyRegistry() const final { return m_propertyRegistry; }
> 
>- void parseAttribute(const QualifiedName&, const AtomicString&) final;
>+ void parseAttribute(const QualifiedName&, const AtomString&) final;
> void svgAttributeChanged(const QualifiedName&) final;
> 
> bool isValid() const final { return SVGTests::isValid(); }
>diff --git a/Source/WebCore/svg/SVGClipPathElement.cpp b/Source/WebCore/svg/SVGClipPathElement.cpp
>index e104c59321d4232515ef0ba75931049aa84d6fbf..74f973cd921650ffdbd592419f22286ea6f12e24 100644
>--- a/Source/WebCore/svg/SVGClipPathElement.cpp
>+++ b/Source/WebCore/svg/SVGClipPathElement.cpp
>@@ -50,7 +50,7 @@ Ref<SVGClipPathElement> SVGClipPathElement::create(const QualifiedName& tagName,
> return adoptRef(*new SVGClipPathElement(tagName, document));
> }
> 
>-void SVGClipPathElement::parseAttribute(const QualifiedName& name, const AtomicString& value)
>+void SVGClipPathElement::parseAttribute(const QualifiedName& name, const AtomString& value)
> {
> if (name == SVGNames::clipPathUnitsAttr) {
> auto propertyValue = SVGPropertyTraits<SVGUnitTypes::SVGUnitType>::fromString(value);
>diff --git a/Source/WebCore/svg/SVGClipPathElement.h b/Source/WebCore/svg/SVGClipPathElement.h
>index 3ef0368cc94f44adf4d04f7a3ac28dd3cbbbe396..fb3ef17ea4807d44c08c4ed281c322881b9729dd 100644
>--- a/Source/WebCore/svg/SVGClipPathElement.h
>+++ b/Source/WebCore/svg/SVGClipPathElement.h
>@@ -43,7 +43,7 @@ private:
> using PropertyRegistry = SVGPropertyOwnerRegistry<SVGClipPathElement, SVGGraphicsElement, SVGExternalResourcesRequired>;
> const SVGPropertyRegistry& propertyRegistry() const final { return m_propertyRegistry; }
> 
>- void parseAttribute(const QualifiedName&, const AtomicString&) final;
>+ void parseAttribute(const QualifiedName&, const AtomString&) final;
> void svgAttributeChanged(const QualifiedName&) final;
> void childrenChanged(const ChildChange&) final;
> 
>diff --git a/Source/WebCore/svg/SVGComponentTransferFunctionElement.cpp b/Source/WebCore/svg/SVGComponentTransferFunctionElement.cpp
>index 01c03297e2a00a61d411527bc03e9b4fd4cff6db..68f9227aff5bf0ded9dcebbb7ecfb634e13d8b56 100644
>--- a/Source/WebCore/svg/SVGComponentTransferFunctionElement.cpp
>+++ b/Source/WebCore/svg/SVGComponentTransferFunctionElement.cpp
>@@ -46,7 +46,7 @@ SVGComponentTransferFunctionElement::SVGComponentTransferFunctionElement(const Q
> });
> }
> 
>-void SVGComponentTransferFunctionElement::parseAttribute(const QualifiedName& name, const AtomicString& value)
>+void SVGComponentTransferFunctionElement::parseAttribute(const QualifiedName& name, const AtomString& value)
> {
> if (name == SVGNames::typeAttr) {
> ComponentTransferType propertyValue = SVGPropertyTraits<ComponentTransferType>::fromString(value);
>diff --git a/Source/WebCore/svg/SVGComponentTransferFunctionElement.h b/Source/WebCore/svg/SVGComponentTransferFunctionElement.h
>index a3388f82e28219446f2f231e6b0e753abfdf5131..e590f2c6308de4ae02eb1acd033406f65f0ec2bd 100644
>--- a/Source/WebCore/svg/SVGComponentTransferFunctionElement.h
>+++ b/Source/WebCore/svg/SVGComponentTransferFunctionElement.h
>@@ -94,7 +94,7 @@ protected:
> using PropertyRegistry = SVGPropertyOwnerRegistry<SVGComponentTransferFunctionElement, SVGElement>;
> const SVGPropertyRegistry& propertyRegistry() const override { return m_propertyRegistry; }
> 
>- void parseAttribute(const QualifiedName&, const AtomicString&) override;
>+ void parseAttribute(const QualifiedName&, const AtomString&) override;
> void svgAttributeChanged(const QualifiedName&) override;
> 
> bool rendererIsNeeded(const RenderStyle&) override { return false; }
>diff --git a/Source/WebCore/svg/SVGCursorElement.cpp b/Source/WebCore/svg/SVGCursorElement.cpp
>index d20a3a46b5f5037a6e8129d25c716b5999bc3726..5cd7d19de9395ee1ff45d0b7e46e853e0bbf7447 100644
>--- a/Source/WebCore/svg/SVGCursorElement.cpp
>+++ b/Source/WebCore/svg/SVGCursorElement.cpp
>@@ -59,7 +59,7 @@ SVGCursorElement::~SVGCursorElement()
> client->cursorElementRemoved(*this);
> }
> 
>-void SVGCursorElement::parseAttribute(const QualifiedName& name, const AtomicString& value)
>+void SVGCursorElement::parseAttribute(const QualifiedName& name, const AtomString& value)
> {
> SVGParsingError parseError = NoError;
> 
>diff --git a/Source/WebCore/svg/SVGCursorElement.h b/Source/WebCore/svg/SVGCursorElement.h
>index 9b812ebc8b4f11be972025aaa64458642fba6aed..ed64d5fa19e835f9080532555f17c8cf4744c022 100644
>--- a/Source/WebCore/svg/SVGCursorElement.h
>+++ b/Source/WebCore/svg/SVGCursorElement.h
>@@ -52,7 +52,7 @@ private:
> using PropertyRegistry = SVGPropertyOwnerRegistry<SVGCursorElement, SVGElement, SVGExternalResourcesRequired, SVGTests, SVGURIReference>;
> const SVGPropertyRegistry& propertyRegistry() const final { return m_propertyRegistry; }
> 
>- void parseAttribute(const QualifiedName&, const AtomicString&) final;
>+ void parseAttribute(const QualifiedName&, const AtomString&) final;
> void svgAttributeChanged(const QualifiedName&) final;
> 
> bool isValid() const final { return SVGTests::isValid(); }
>diff --git a/Source/WebCore/svg/SVGDocumentExtensions.cpp b/Source/WebCore/svg/SVGDocumentExtensions.cpp
>index 5c45335b5a5333088b5dfe42d4629ead6f5a8df8..bc51434b0b2b8e0bf77e57a4a76e4d4bceee9965 100644
>--- a/Source/WebCore/svg/SVGDocumentExtensions.cpp
>+++ b/Source/WebCore/svg/SVGDocumentExtensions.cpp
>@@ -35,7 +35,7 @@
> #include "SVGSVGElement.h"
> #include "ScriptableDocumentParser.h"
> #include "ShadowRoot.h"
>-#include <wtf/text/AtomicString.h>
>+#include <wtf/text/AtomString.h>
> 
> namespace WebCore {
> 
>@@ -60,7 +60,7 @@ void SVGDocumentExtensions::removeTimeContainer(SVGSVGElement& element)
> m_timeContainers.remove(&element);
> }
> 
>-void SVGDocumentExtensions::addResource(const AtomicString& id, RenderSVGResourceContainer& resource)
>+void SVGDocumentExtensions::addResource(const AtomString& id, RenderSVGResourceContainer& resource)
> {
> if (id.isEmpty())
> return;
>@@ -69,7 +69,7 @@ void SVGDocumentExtensions::addResource(const AtomicString& id, RenderSVGResourc
> m_resources.set(id, &resource);
> }
> 
>-void SVGDocumentExtensions::removeResource(const AtomicString& id)
>+void SVGDocumentExtensions::removeResource(const AtomString& id)
> {
> if (id.isEmpty())
> return;
>@@ -77,7 +77,7 @@ void SVGDocumentExtensions::removeResource(const AtomicString& id)
> m_resources.remove(id);
> }
> 
>-RenderSVGResourceContainer* SVGDocumentExtensions::resourceById(const AtomicString& id) const
>+RenderSVGResourceContainer* SVGDocumentExtensions::resourceById(const AtomString& id) const
> {
> if (id.isEmpty())
> return 0;
>@@ -139,7 +139,7 @@ void SVGDocumentExtensions::reportError(const String& message)
> reportMessage(m_document, MessageLevel::Error, "Error: " + message);
> }
> 
>-void SVGDocumentExtensions::addPendingResource(const AtomicString& id, Element& element)
>+void SVGDocumentExtensions::addPendingResource(const AtomString& id, Element& element)
> {
> if (id.isEmpty())
> return;
>@@ -152,7 +152,7 @@ void SVGDocumentExtensions::addPendingResource(const AtomicString& id, Element&
> element.setHasPendingResources();
> }
> 
>-bool SVGDocumentExtensions::isIdOfPendingResource(const AtomicString& id) const
>+bool SVGDocumentExtensions::isIdOfPendingResource(const AtomString& id) const
> {
> if (id.isEmpty())
> return false;
>@@ -172,7 +172,7 @@ bool SVGDocumentExtensions::isElementWithPendingResources(Element& element) cons
> return false;
> }
> 
>-bool SVGDocumentExtensions::isPendingResource(Element& element, const AtomicString& id) const
>+bool SVGDocumentExtensions::isPendingResource(Element& element, const AtomString& id) const
> {
> if (!isIdOfPendingResource(id))
> return false;
>@@ -190,7 +190,7 @@ void SVGDocumentExtensions::removeElementFromPendingResources(Element& element)
> {
> // Remove the element from pending resources.
> if (!m_pendingResources.isEmpty() && element.hasPendingResources()) {
>- Vector<AtomicString> toBeRemoved;
>+ Vector<AtomString> toBeRemoved;
> for (auto& resource : m_pendingResources) {
> PendingElements* elements = resource.value.get();
> ASSERT(elements);
>@@ -210,7 +210,7 @@ void SVGDocumentExtensions::removeElementFromPendingResources(Element& element)
> 
> // Remove the element from pending resources that were scheduled for removal.
> if (!m_pendingResourcesForRemoval.isEmpty()) {
>- Vector<AtomicString> toBeRemoved;
>+ Vector<AtomString> toBeRemoved;
> for (auto& resource : m_pendingResourcesForRemoval) {
> PendingElements* elements = resource.value.get();
> ASSERT(elements);
>@@ -227,19 +227,19 @@ void SVGDocumentExtensions::removeElementFromPendingResources(Element& element)
> }
> }
> 
>-std::unique_ptr<SVGDocumentExtensions::PendingElements> SVGDocumentExtensions::removePendingResource(const AtomicString& id)
>+std::unique_ptr<SVGDocumentExtensions::PendingElements> SVGDocumentExtensions::removePendingResource(const AtomString& id)
> {
> ASSERT(m_pendingResources.contains(id));
> return m_pendingResources.take(id);
> }
> 
>-std::unique_ptr<SVGDocumentExtensions::PendingElements> SVGDocumentExtensions::removePendingResourceForRemoval(const AtomicString& id)
>+std::unique_ptr<SVGDocumentExtensions::PendingElements> SVGDocumentExtensions::removePendingResourceForRemoval(const AtomString& id)
> {
> ASSERT(m_pendingResourcesForRemoval.contains(id));
> return m_pendingResourcesForRemoval.take(id);
> }
> 
>-void SVGDocumentExtensions::markPendingResourcesForRemoval(const AtomicString& id)
>+void SVGDocumentExtensions::markPendingResourcesForRemoval(const AtomString& id)
> {
> if (id.isEmpty())
> return;
>@@ -251,7 +251,7 @@ void SVGDocumentExtensions::markPendingResourcesForRemoval(const AtomicString& i
> m_pendingResourcesForRemoval.add(id, WTFMove(existing));
> }
> 
>-RefPtr<Element> SVGDocumentExtensions::removeElementFromPendingResourcesForRemovalMap(const AtomicString& id)
>+RefPtr<Element> SVGDocumentExtensions::removeElementFromPendingResourcesForRemovalMap(const AtomString& id)
> {
> if (id.isEmpty())
> return 0;
>diff --git a/Source/WebCore/svg/SVGDocumentExtensions.h b/Source/WebCore/svg/SVGDocumentExtensions.h
>index c49f2dc73d21aeb36a118c71a78e50254bf9a334..8fbdf3a3a63b55e37e283a69e83dc24926eef5d2 100644
>--- a/Source/WebCore/svg/SVGDocumentExtensions.h
>+++ b/Source/WebCore/svg/SVGDocumentExtensions.h
>@@ -23,7 +23,7 @@
> #include <wtf/Forward.h>
> #include <wtf/HashMap.h>
> #include <wtf/HashSet.h>
>-#include <wtf/text/AtomicStringHash.h>
>+#include <wtf/text/AtomStringHash.h>
> 
> namespace WebCore {
> 
>@@ -46,9 +46,9 @@ public:
> void addTimeContainer(SVGSVGElement&);
> void removeTimeContainer(SVGSVGElement&);
> 
>- void addResource(const AtomicString& id, RenderSVGResourceContainer&);
>- void removeResource(const AtomicString& id);
>- RenderSVGResourceContainer* resourceById(const AtomicString& id) const;
>+ void addResource(const AtomString& id, RenderSVGResourceContainer&);
>+ void removeResource(const AtomString& id);
>+ RenderSVGResourceContainer* resourceById(const AtomString& id) const;
> 
> void startAnimations();
> void pauseAnimations();
>@@ -82,9 +82,9 @@ private:
> #if ENABLE(SVG_FONTS)
> HashSet<SVGFontFaceElement*> m_svgFontFaceElements;
> #endif
>- HashMap<AtomicString, RenderSVGResourceContainer*> m_resources;
>- HashMap<AtomicString, std::unique_ptr<PendingElements>> m_pendingResources; // Resources that are pending.
>- HashMap<AtomicString, std::unique_ptr<PendingElements>> m_pendingResourcesForRemoval; // Resources that are pending and scheduled for removal.
>+ HashMap<AtomString, RenderSVGResourceContainer*> m_resources;
>+ HashMap<AtomString, std::unique_ptr<PendingElements>> m_pendingResources; // Resources that are pending.
>+ HashMap<AtomString, std::unique_ptr<PendingElements>> m_pendingResourcesForRemoval; // Resources that are pending and scheduled for removal.
> HashMap<SVGElement*, std::unique_ptr<HashSet<SVGElement*>>> m_elementDependencies;
> std::unique_ptr<SVGResourcesCache> m_resourcesCache;
> 
>@@ -95,20 +95,20 @@ public:
> // This HashMap contains a list of pending resources. Pending resources, are such
> // which are referenced by any object in the SVG document, but do NOT exist yet.
> // For instance, dynamically build gradients / patterns / clippers...
>- void addPendingResource(const AtomicString& id, Element&);
>- bool isIdOfPendingResource(const AtomicString& id) const;
>- bool isPendingResource(Element&, const AtomicString& id) const;
>+ void addPendingResource(const AtomString& id, Element&);
>+ bool isIdOfPendingResource(const AtomString& id) const;
>+ bool isPendingResource(Element&, const AtomString& id) const;
> void clearHasPendingResourcesIfPossible(Element&);
> void removeElementFromPendingResources(Element&);
>- std::unique_ptr<PendingElements> removePendingResource(const AtomicString& id);
>+ std::unique_ptr<PendingElements> removePendingResource(const AtomString& id);
> 
> // The following two functions are used for scheduling a pending resource to be removed.
>- void markPendingResourcesForRemoval(const AtomicString&);
>- RefPtr<Element> removeElementFromPendingResourcesForRemovalMap(const AtomicString&);
>+ void markPendingResourcesForRemoval(const AtomString&);
>+ RefPtr<Element> removeElementFromPendingResourcesForRemovalMap(const AtomString&);
> 
> private:
> bool isElementWithPendingResources(Element&) const;
>- std::unique_ptr<PendingElements> removePendingResourceForRemoval(const AtomicString&);
>+ std::unique_ptr<PendingElements> removePendingResourceForRemoval(const AtomString&);
> };
> 
> } // namespace WebCore
>diff --git a/Source/WebCore/svg/SVGElement.cpp b/Source/WebCore/svg/SVGElement.cpp
>index cc5b6fd25e85b7f9ca9eca2e1aead4ef458f6189..a8096ddada81ead6a7a1ea324cd85067f5c0b28b 100644
>--- a/Source/WebCore/svg/SVGElement.cpp
>+++ b/Source/WebCore/svg/SVGElement.cpp
>@@ -64,7 +64,7 @@ namespace WebCore {
> 
> WTF_MAKE_ISO_ALLOCATED_IMPL(SVGElement);
> 
>-static NEVER_INLINE HashMap<AtomicStringImpl*, CSSPropertyID> createAttributeNameToCSSPropertyIDMap()
>+static NEVER_INLINE HashMap<AtomStringImpl*, CSSPropertyID> createAttributeNameToCSSPropertyIDMap()
> {
> using namespace HTMLNames;
> using namespace SVGNames;
>@@ -144,10 +144,10 @@ static NEVER_INLINE HashMap<AtomicStringImpl*, CSSPropertyID> createAttributeNam
> &yAttr.get(),
> };
> 
>- HashMap<AtomicStringImpl*, CSSPropertyID> map;
>+ HashMap<AtomStringImpl*, CSSPropertyID> map;
> 
> for (auto& name : attributeNames) {
>- const AtomicString& localName = name->localName();
>+ const AtomString& localName = name->localName();
> map.add(localName.impl(), cssPropertyID(localName));
> }
> 
>@@ -230,7 +230,7 @@ bool SVGElement::isOutermostSVGSVGElement() const
> return !parentNode()->isSVGElement();
> }
> 
>-void SVGElement::reportAttributeParsingError(SVGParsingError error, const QualifiedName& name, const AtomicString& value)
>+void SVGElement::reportAttributeParsingError(SVGParsingError error, const QualifiedName& name, const AtomString& value)
> {
> if (error == NoError)
> return;
>@@ -341,7 +341,7 @@ void SVGElement::setCorrespondingElement(SVGElement* correspondingElement)
> correspondingElement->ensureSVGRareData().instances().add(this);
> }
> 
>-void SVGElement::parseAttribute(const QualifiedName& name, const AtomicString& value)
>+void SVGElement::parseAttribute(const QualifiedName& name, const AtomString& value)
> {
> if (name == HTMLNames::classAttr) {
> m_className->setBaseValInternal(value);
>@@ -374,7 +374,7 @@ bool SVGElement::haveLoadedRequiredResources()
> return true;
> }
> 
>-bool SVGElement::addEventListener(const AtomicString& eventType, Ref<EventListener>&& listener, const AddEventListenerOptions& options)
>+bool SVGElement::addEventListener(const AtomString& eventType, Ref<EventListener>&& listener, const AddEventListenerOptions& options)
> { 
> // Add event listener to regular DOM element
> if (!Node::addEventListener(eventType, listener.copyRef(), options))
>@@ -394,7 +394,7 @@ bool SVGElement::addEventListener(const AtomicString& eventType, Ref<EventListen
> return true;
> }
> 
>-bool SVGElement::removeEventListener(const AtomicString& eventType, EventListener& listener, const ListenerOptions& options)
>+bool SVGElement::removeEventListener(const AtomString& eventType, EventListener& listener, const ListenerOptions& options)
> {
> if (containingShadowRoot())
> return Node::removeEventListener(eventType, listener, options);
>@@ -533,7 +533,7 @@ bool SVGElement::childShouldCreateRenderer(const Node& child) const
> return svgChild.isValid();
> }
> 
>-void SVGElement::attributeChanged(const QualifiedName& name, const AtomicString& oldValue, const AtomicString& newValue, AttributeModificationReason)
>+void SVGElement::attributeChanged(const QualifiedName& name, const AtomString& oldValue, const AtomString& newValue, AttributeModificationReason)
> {
> StyledElement::attributeChanged(name, oldValue, newValue);
> 
>@@ -675,7 +675,7 @@ const RenderStyle* SVGElement::computedStyle(PseudoId pseudoElementSpecifier)
> return m_svgRareData->overrideComputedStyle(*this, parentStyle);
> }
> 
>-QualifiedName SVGElement::animatableAttributeForName(const AtomicString& localName)
>+QualifiedName SVGElement::animatableAttributeForName(const AtomString& localName)
> {
> static const auto animatableAttributes = makeNeverDestroyed([] {
> static const QualifiedName* const names[] = {
>@@ -773,7 +773,7 @@ QualifiedName SVGElement::animatableAttributeForName(const AtomicString& localNa
> &SVGNames::zAttr.get(),
> &SVGNames::hrefAttr.get(),
> };
>- HashMap<AtomicString, QualifiedName> map;
>+ HashMap<AtomString, QualifiedName> map;
> for (auto& name : names) {
> auto addResult = map.add(name->localName(), *name);
> ASSERT_UNUSED(addResult, addResult.isNewEntry);
>@@ -839,7 +839,7 @@ bool SVGElement::isPresentationAttribute(const QualifiedName& name) const
> return StyledElement::isPresentationAttribute(name);
> }
> 
>-void SVGElement::collectStyleForPresentationAttribute(const QualifiedName& name, const AtomicString& value, MutableStyleProperties& style)
>+void SVGElement::collectStyleForPresentationAttribute(const QualifiedName& name, const AtomString& value, MutableStyleProperties& style)
> {
> CSSPropertyID propertyID = cssPropertyIdForSVGAttributeName(name);
> if (propertyID > 0)
>diff --git a/Source/WebCore/svg/SVGElement.h b/Source/WebCore/svg/SVGElement.h
>index b4a701d1ed82a944906fec755897b625f8bf7170..dd455d6e3e8b6d6d372087d6854681ac32700c96 100644
>--- a/Source/WebCore/svg/SVGElement.h
>+++ b/Source/WebCore/svg/SVGElement.h
>@@ -45,7 +45,7 @@ class SVGPropertyAnimatorFactory;
> class SVGSVGElement;
> class SVGUseElement;
> 
>-void mapAttributeToCSSProperty(HashMap<AtomicStringImpl*, CSSPropertyID>* propertyNameToIdMap, const QualifiedName& attrName);
>+void mapAttributeToCSSProperty(HashMap<AtomStringImpl*, CSSPropertyID>* propertyNameToIdMap, const QualifiedName& attrName);
> 
> class SVGElement : public StyledElement, public SVGLangSpace, public SVGPropertyOwner {
> WTF_MAKE_ISO_ALLOCATED(SVGElement);
>@@ -103,7 +103,7 @@ public:
> 
> Optional<ElementStyle> resolveCustomStyle(const RenderStyle& parentStyle, const RenderStyle* shadowHostStyle) override;
> 
>- static QualifiedName animatableAttributeForName(const AtomicString&);
>+ static QualifiedName animatableAttributeForName(const AtomString&);
> #ifndef NDEBUG
> bool isAnimatableAttribute(const QualifiedName&) const;
> #endif
>@@ -114,8 +114,8 @@ public:
> 
> virtual bool haveLoadedRequiredResources();
> 
>- bool addEventListener(const AtomicString& eventType, Ref<EventListener>&&, const AddEventListenerOptions&) override;
>- bool removeEventListener(const AtomicString& eventType, EventListener&, const ListenerOptions&) override;
>+ bool addEventListener(const AtomString& eventType, Ref<EventListener>&&, const AddEventListenerOptions&) override;
>+ bool removeEventListener(const AtomString& eventType, EventListener&, const ListenerOptions&) override;
> bool hasFocusEventListeners() const;
> 
> bool hasTagName(const SVGQualifiedName& name) const { return hasLocalName(name.localName()); }
>@@ -158,19 +158,19 @@ protected:
> bool supportsFocus() const override { return false; }
> 
> bool rendererIsNeeded(const RenderStyle&) override;
>- void parseAttribute(const QualifiedName&, const AtomicString&) override;
>+ void parseAttribute(const QualifiedName&, const AtomString&) override;
> 
> void finishParsingChildren() override;
>- void attributeChanged(const QualifiedName&, const AtomicString& oldValue, const AtomicString& newValue, AttributeModificationReason = ModifiedDirectly) override;
>+ void attributeChanged(const QualifiedName&, const AtomString& oldValue, const AtomString& newValue, AttributeModificationReason = ModifiedDirectly) override;
> bool childShouldCreateRenderer(const Node&) const override;
> 
> SVGElementRareData& ensureSVGRareData();
> 
>- void reportAttributeParsingError(SVGParsingError, const QualifiedName&, const AtomicString&);
>+ void reportAttributeParsingError(SVGParsingError, const QualifiedName&, const AtomString&);
> static CSSPropertyID cssPropertyIdForSVGAttributeName(const QualifiedName&);
> 
> bool isPresentationAttribute(const QualifiedName&) const override;
>- void collectStyleForPresentationAttribute(const QualifiedName&, const AtomicString&, MutableStyleProperties&) override;
>+ void collectStyleForPresentationAttribute(const QualifiedName&, const AtomString&, MutableStyleProperties&) override;
> InsertedIntoAncestorResult insertedIntoAncestor(InsertionType, ContainerNode&) override;
> void removedFromAncestor(RemovalType, ContainerNode&) override;
> void childrenChanged(const ChildChange&) override;
>diff --git a/Source/WebCore/svg/SVGEllipseElement.cpp b/Source/WebCore/svg/SVGEllipseElement.cpp
>index 23e4adaa408380111e9ac19b9dbf76df94ccdcb9..8332eb5dbfc28f8627824bf889f8f346066d341c 100644
>--- a/Source/WebCore/svg/SVGEllipseElement.cpp
>+++ b/Source/WebCore/svg/SVGEllipseElement.cpp
>@@ -50,7 +50,7 @@ Ref<SVGEllipseElement> SVGEllipseElement::create(const QualifiedName& tagName, D
> return adoptRef(*new SVGEllipseElement(tagName, document));
> }
> 
>-void SVGEllipseElement::parseAttribute(const QualifiedName& name, const AtomicString& value)
>+void SVGEllipseElement::parseAttribute(const QualifiedName& name, const AtomString& value)
> {
> SVGParsingError parseError = NoError;
> 
>diff --git a/Source/WebCore/svg/SVGEllipseElement.h b/Source/WebCore/svg/SVGEllipseElement.h
>index 0fdca3767c4bb23fc62246777dc83a89117e9886..303558e02e53ffa2881f135f0ae8159e715c3c0b 100644
>--- a/Source/WebCore/svg/SVGEllipseElement.h
>+++ b/Source/WebCore/svg/SVGEllipseElement.h
>@@ -48,7 +48,7 @@ private:
> using PropertyRegistry = SVGPropertyOwnerRegistry<SVGEllipseElement, SVGGeometryElement, SVGExternalResourcesRequired>;
> const SVGPropertyRegistry& propertyRegistry() const final { return m_propertyRegistry; }
> 
>- void parseAttribute(const QualifiedName&, const AtomicString&) final;
>+ void parseAttribute(const QualifiedName&, const AtomString&) final;
> void svgAttributeChanged(const QualifiedName&) final;
> 
> bool isValid() const final { return SVGTests::isValid(); }
>diff --git a/Source/WebCore/svg/SVGExternalResourcesRequired.cpp b/Source/WebCore/svg/SVGExternalResourcesRequired.cpp
>index 8095f2b97cd87cb399bbddfa949694e31b38d980..1f23d90ee1eec386abbe5163d1e9d0da3599b37e 100644
>--- a/Source/WebCore/svg/SVGExternalResourcesRequired.cpp
>+++ b/Source/WebCore/svg/SVGExternalResourcesRequired.cpp
>@@ -39,7 +39,7 @@ SVGExternalResourcesRequired::SVGExternalResourcesRequired(SVGElement* contextEl
> });
> }
> 
>-void SVGExternalResourcesRequired::parseAttribute(const QualifiedName& name, const AtomicString& value)
>+void SVGExternalResourcesRequired::parseAttribute(const QualifiedName& name, const AtomString& value)
> {
> if (name == SVGNames::externalResourcesRequiredAttr)
> m_externalResourcesRequired->setBaseValInternal(value == "true");
>diff --git a/Source/WebCore/svg/SVGExternalResourcesRequired.h b/Source/WebCore/svg/SVGExternalResourcesRequired.h
>index 9919af6d1fa07c5dc559bc708810faf444eaea30..f8fadc0492bd4dcc7944daf4ea0abf0d88dce4ae 100644
>--- a/Source/WebCore/svg/SVGExternalResourcesRequired.h
>+++ b/Source/WebCore/svg/SVGExternalResourcesRequired.h
>@@ -39,7 +39,7 @@ class SVGExternalResourcesRequired {
> public:
> virtual ~SVGExternalResourcesRequired() = default;
> 
>- void parseAttribute(const QualifiedName&, const AtomicString&);
>+ void parseAttribute(const QualifiedName&, const AtomString&);
> void svgAttributeChanged(const QualifiedName&);
> 
> static void addSupportedAttributes(HashSet<QualifiedName>&);
>diff --git a/Source/WebCore/svg/SVGFEBlendElement.cpp b/Source/WebCore/svg/SVGFEBlendElement.cpp
>index 3308dc7511ed45ea5a74cf7e6c2dd15e5e3f1efc..7bcf041800f799f1174cfe04b822d6d06431f686 100644
>--- a/Source/WebCore/svg/SVGFEBlendElement.cpp
>+++ b/Source/WebCore/svg/SVGFEBlendElement.cpp
>@@ -51,7 +51,7 @@ Ref<SVGFEBlendElement> SVGFEBlendElement::create(const QualifiedName& tagName, D
> return adoptRef(*new SVGFEBlendElement(tagName, document));
> }
> 
>-void SVGFEBlendElement::parseAttribute(const QualifiedName& name, const AtomicString& value)
>+void SVGFEBlendElement::parseAttribute(const QualifiedName& name, const AtomString& value)
> {
> if (name == SVGNames::modeAttr) {
> BlendMode mode = BlendMode::Normal;
>diff --git a/Source/WebCore/svg/SVGFEBlendElement.h b/Source/WebCore/svg/SVGFEBlendElement.h
>index a9c98e427664b2e13c167078f1f0dc7cd50230ba..9037cb121f9367b788d9216e0b941fc8b06dec66 100644
>--- a/Source/WebCore/svg/SVGFEBlendElement.h
>+++ b/Source/WebCore/svg/SVGFEBlendElement.h
>@@ -66,7 +66,7 @@ private:
> using PropertyRegistry = SVGPropertyOwnerRegistry<SVGFEBlendElement, SVGFilterPrimitiveStandardAttributes>;
> const SVGPropertyRegistry& propertyRegistry() const final { return m_propertyRegistry; }
> 
>- void parseAttribute(const QualifiedName&, const AtomicString&) override;
>+ void parseAttribute(const QualifiedName&, const AtomString&) override;
> void svgAttributeChanged(const QualifiedName&) override;
> 
> RefPtr<FilterEffect> build(SVGFilterBuilder*, Filter&) const override;
>diff --git a/Source/WebCore/svg/SVGFEColorMatrixElement.cpp b/Source/WebCore/svg/SVGFEColorMatrixElement.cpp
>index 6597672b30741797e8873adfc7ab80a63ae6c3ff..e0c597df92a5b30f7a7f9a4935643fc5340aecdb 100644
>--- a/Source/WebCore/svg/SVGFEColorMatrixElement.cpp
>+++ b/Source/WebCore/svg/SVGFEColorMatrixElement.cpp
>@@ -49,7 +49,7 @@ Ref<SVGFEColorMatrixElement> SVGFEColorMatrixElement::create(const QualifiedName
> return adoptRef(*new SVGFEColorMatrixElement(tagName, document));
> }
> 
>-void SVGFEColorMatrixElement::parseAttribute(const QualifiedName& name, const AtomicString& value)
>+void SVGFEColorMatrixElement::parseAttribute(const QualifiedName& name, const AtomString& value)
> {
> if (name == SVGNames::typeAttr) {
> auto propertyValue = SVGPropertyTraits<ColorMatrixType>::fromString(value);
>diff --git a/Source/WebCore/svg/SVGFEColorMatrixElement.h b/Source/WebCore/svg/SVGFEColorMatrixElement.h
>index 3ef24c94224868da77d0e80bcdf0c7465393f23e..7ab4aa4181e7ab198b12e77be206b9c5c41023fd 100644
>--- a/Source/WebCore/svg/SVGFEColorMatrixElement.h
>+++ b/Source/WebCore/svg/SVGFEColorMatrixElement.h
>@@ -82,7 +82,7 @@ private:
> using PropertyRegistry = SVGPropertyOwnerRegistry<SVGFEColorMatrixElement, SVGFilterPrimitiveStandardAttributes>;
> const SVGPropertyRegistry& propertyRegistry() const final { return m_propertyRegistry; }
> 
>- void parseAttribute(const QualifiedName&, const AtomicString&) override;
>+ void parseAttribute(const QualifiedName&, const AtomString&) override;
> void svgAttributeChanged(const QualifiedName&) override;
> 
> bool setFilterEffectAttribute(FilterEffect*, const QualifiedName&) override;
>diff --git a/Source/WebCore/svg/SVGFEComponentTransferElement.cpp b/Source/WebCore/svg/SVGFEComponentTransferElement.cpp
>index ec515e114a2acf2a76054ee0a57a3d13b3bd4fa3..491a1b45e7a76f8aa946332573a69d2ad0ad21a9 100644
>--- a/Source/WebCore/svg/SVGFEComponentTransferElement.cpp
>+++ b/Source/WebCore/svg/SVGFEComponentTransferElement.cpp
>@@ -52,7 +52,7 @@ Ref<SVGFEComponentTransferElement> SVGFEComponentTransferElement::create(const Q
> return adoptRef(*new SVGFEComponentTransferElement(tagName, document));
> }
> 
>-void SVGFEComponentTransferElement::parseAttribute(const QualifiedName& name, const AtomicString& value)
>+void SVGFEComponentTransferElement::parseAttribute(const QualifiedName& name, const AtomString& value)
> {
> if (name == SVGNames::inAttr) {
> m_in1->setBaseValInternal(value);
>diff --git a/Source/WebCore/svg/SVGFEComponentTransferElement.h b/Source/WebCore/svg/SVGFEComponentTransferElement.h
>index 526216e56016fab5224aabe9132064cdb03ad0bb..bb589347d8826dfb3609edac6e8b993a4dd54863 100644
>--- a/Source/WebCore/svg/SVGFEComponentTransferElement.h
>+++ b/Source/WebCore/svg/SVGFEComponentTransferElement.h
>@@ -41,7 +41,7 @@ private:
> const SVGPropertyRegistry& propertyRegistry() const final { return m_propertyRegistry; }
> 
> // FIXME: svgAttributeChanged missing.
>- void parseAttribute(const QualifiedName&, const AtomicString&) override;
>+ void parseAttribute(const QualifiedName&, const AtomString&) override;
> 
> RefPtr<FilterEffect> build(SVGFilterBuilder*, Filter&) const override;
> 
>diff --git a/Source/WebCore/svg/SVGFECompositeElement.cpp b/Source/WebCore/svg/SVGFECompositeElement.cpp
>index 90880ab1ddc552a7785a466fd917b25f635b8ade..3ca99b875708bbd8a6baf653dc06fe205ac98235 100644
>--- a/Source/WebCore/svg/SVGFECompositeElement.cpp
>+++ b/Source/WebCore/svg/SVGFECompositeElement.cpp
>@@ -53,7 +53,7 @@ Ref<SVGFECompositeElement> SVGFECompositeElement::create(const QualifiedName& ta
> return adoptRef(*new SVGFECompositeElement(tagName, document));
> }
> 
>-void SVGFECompositeElement::parseAttribute(const QualifiedName& name, const AtomicString& value)
>+void SVGFECompositeElement::parseAttribute(const QualifiedName& name, const AtomString& value)
> {
> if (name == SVGNames::operatorAttr) {
> CompositeOperationType propertyValue = SVGPropertyTraits<CompositeOperationType>::fromString(value);
>diff --git a/Source/WebCore/svg/SVGFECompositeElement.h b/Source/WebCore/svg/SVGFECompositeElement.h
>index a33c982b3495e3abfd4f18756aa110299fc9c2c5..81a78c8657a0fa3044df5b7c5a080d6e779722f6 100644
>--- a/Source/WebCore/svg/SVGFECompositeElement.h
>+++ b/Source/WebCore/svg/SVGFECompositeElement.h
>@@ -105,7 +105,7 @@ private:
> using PropertyRegistry = SVGPropertyOwnerRegistry<SVGFECompositeElement, SVGFilterPrimitiveStandardAttributes>;
> const SVGPropertyRegistry& propertyRegistry() const final { return m_propertyRegistry; }
> 
>- void parseAttribute(const QualifiedName&, const AtomicString&) override;
>+ void parseAttribute(const QualifiedName&, const AtomString&) override;
> void svgAttributeChanged(const QualifiedName&) override;
> 
> bool setFilterEffectAttribute(FilterEffect*, const QualifiedName&) override;
>diff --git a/Source/WebCore/svg/SVGFEConvolveMatrixElement.cpp b/Source/WebCore/svg/SVGFEConvolveMatrixElement.cpp
>index eb914fa3450cde59cd947d18f7b1d2f22a1c9de0..43d8d6d87c2fc4fe779e14c13ca8d586e45b1c6b 100644
>--- a/Source/WebCore/svg/SVGFEConvolveMatrixElement.cpp
>+++ b/Source/WebCore/svg/SVGFEConvolveMatrixElement.cpp
>@@ -59,7 +59,7 @@ Ref<SVGFEConvolveMatrixElement> SVGFEConvolveMatrixElement::create(const Qualifi
> return adoptRef(*new SVGFEConvolveMatrixElement(tagName, document));
> }
> 
>-void SVGFEConvolveMatrixElement::parseAttribute(const QualifiedName& name, const AtomicString& value)
>+void SVGFEConvolveMatrixElement::parseAttribute(const QualifiedName& name, const AtomString& value)
> {
> if (name == SVGNames::inAttr) {
> m_in1->setBaseValInternal(value);
>diff --git a/Source/WebCore/svg/SVGFEConvolveMatrixElement.h b/Source/WebCore/svg/SVGFEConvolveMatrixElement.h
>index cea1123faa918d5f1f15d2d433ec011f70211002..85c002698c6277e04370d35982a95b8d9049b339 100644
>--- a/Source/WebCore/svg/SVGFEConvolveMatrixElement.h
>+++ b/Source/WebCore/svg/SVGFEConvolveMatrixElement.h
>@@ -99,7 +99,7 @@ private:
> using PropertyRegistry = SVGPropertyOwnerRegistry<SVGFEConvolveMatrixElement, SVGFilterPrimitiveStandardAttributes>;
> const SVGPropertyRegistry& propertyRegistry() const final { return m_propertyRegistry; }
> 
>- void parseAttribute(const QualifiedName&, const AtomicString&) override;
>+ void parseAttribute(const QualifiedName&, const AtomString&) override;
> void svgAttributeChanged(const QualifiedName&) override;
> 
> bool setFilterEffectAttribute(FilterEffect*, const QualifiedName&) override;
>diff --git a/Source/WebCore/svg/SVGFEDiffuseLightingElement.cpp b/Source/WebCore/svg/SVGFEDiffuseLightingElement.cpp
>index e3df5b8d65ac68143b9cfde681d0c5a944663e9d..dd0aee6828574ac0a2c7cbb8cc7e07654be1e67e 100644
>--- a/Source/WebCore/svg/SVGFEDiffuseLightingElement.cpp
>+++ b/Source/WebCore/svg/SVGFEDiffuseLightingElement.cpp
>@@ -53,7 +53,7 @@ Ref<SVGFEDiffuseLightingElement> SVGFEDiffuseLightingElement::create(const Quali
> return adoptRef(*new SVGFEDiffuseLightingElement(tagName, document));
> }
> 
>-void SVGFEDiffuseLightingElement::parseAttribute(const QualifiedName& name, const AtomicString& value)
>+void SVGFEDiffuseLightingElement::parseAttribute(const QualifiedName& name, const AtomString& value)
> {
> if (name == SVGNames::inAttr) {
> m_in1->setBaseValInternal(value);
>diff --git a/Source/WebCore/svg/SVGFEDiffuseLightingElement.h b/Source/WebCore/svg/SVGFEDiffuseLightingElement.h
>index 8d795990cf23e0c414920e2f17b1cce784c7f135..68999609f4b6b56a76c88ea5695f1e0e9e205580 100644
>--- a/Source/WebCore/svg/SVGFEDiffuseLightingElement.h
>+++ b/Source/WebCore/svg/SVGFEDiffuseLightingElement.h
>@@ -54,7 +54,7 @@ private:
> using PropertyRegistry = SVGPropertyOwnerRegistry<SVGFEDiffuseLightingElement, SVGFilterPrimitiveStandardAttributes>;
> const SVGPropertyRegistry& propertyRegistry() const final { return m_propertyRegistry; }
> 
>- void parseAttribute(const QualifiedName&, const AtomicString&) override;
>+ void parseAttribute(const QualifiedName&, const AtomString&) override;
> void svgAttributeChanged(const QualifiedName&) override;
> 
> bool setFilterEffectAttribute(FilterEffect*, const QualifiedName&) override;
>diff --git a/Source/WebCore/svg/SVGFEDisplacementMapElement.cpp b/Source/WebCore/svg/SVGFEDisplacementMapElement.cpp
>index 84bea0b6274a8984e3524845ed372fa114bb4475..0c5e825bc82560f36a269ea6d722dfd05173d8c2 100644
>--- a/Source/WebCore/svg/SVGFEDisplacementMapElement.cpp
>+++ b/Source/WebCore/svg/SVGFEDisplacementMapElement.cpp
>@@ -50,7 +50,7 @@ Ref<SVGFEDisplacementMapElement> SVGFEDisplacementMapElement::create(const Quali
> return adoptRef(*new SVGFEDisplacementMapElement(tagName, document));
> }
> 
>-void SVGFEDisplacementMapElement::parseAttribute(const QualifiedName& name, const AtomicString& value)
>+void SVGFEDisplacementMapElement::parseAttribute(const QualifiedName& name, const AtomString& value)
> {
> if (name == SVGNames::xChannelSelectorAttr) {
> auto propertyValue = SVGPropertyTraits<ChannelSelectorType>::fromString(value);
>diff --git a/Source/WebCore/svg/SVGFEDisplacementMapElement.h b/Source/WebCore/svg/SVGFEDisplacementMapElement.h
>index 422f0cf7ea9505427b07bf0aefffb3b8444197fa..aa91df38b36298f121a1411c4d0ae5ecd58665d3 100644
>--- a/Source/WebCore/svg/SVGFEDisplacementMapElement.h
>+++ b/Source/WebCore/svg/SVGFEDisplacementMapElement.h
>@@ -87,7 +87,7 @@ private:
> using PropertyRegistry = SVGPropertyOwnerRegistry<SVGFEDisplacementMapElement, SVGFilterPrimitiveStandardAttributes>;
> const SVGPropertyRegistry& propertyRegistry() const final { return m_propertyRegistry; }
> 
>- void parseAttribute(const QualifiedName&, const AtomicString&) override;
>+ void parseAttribute(const QualifiedName&, const AtomString&) override;
> void svgAttributeChanged(const QualifiedName&) override;
> 
> bool setFilterEffectAttribute(FilterEffect*, const QualifiedName& attrName) override;
>diff --git a/Source/WebCore/svg/SVGFEDropShadowElement.cpp b/Source/WebCore/svg/SVGFEDropShadowElement.cpp
>index f61dc8a939508bc2c2ffd779a7463204a67b13cf..662703e59ccf2d4885dfb5dd88cded3fe412fd84 100644
>--- a/Source/WebCore/svg/SVGFEDropShadowElement.cpp
>+++ b/Source/WebCore/svg/SVGFEDropShadowElement.cpp
>@@ -58,7 +58,7 @@ void SVGFEDropShadowElement::setStdDeviation(float x, float y)
> invalidate();
> }
> 
>-void SVGFEDropShadowElement::parseAttribute(const QualifiedName& name, const AtomicString& value)
>+void SVGFEDropShadowElement::parseAttribute(const QualifiedName& name, const AtomString& value)
> {
> if (name == SVGNames::stdDeviationAttr) {
> float x, y;
>diff --git a/Source/WebCore/svg/SVGFEDropShadowElement.h b/Source/WebCore/svg/SVGFEDropShadowElement.h
>index 061cca2bed96c1aab0534d7a0913c314ce1be5f4..9b62d24b454bb7d2758e712b621b8cbe42f7451d 100644
>--- a/Source/WebCore/svg/SVGFEDropShadowElement.h
>+++ b/Source/WebCore/svg/SVGFEDropShadowElement.h
>@@ -50,7 +50,7 @@ private:
> using PropertyRegistry = SVGPropertyOwnerRegistry<SVGFEDropShadowElement, SVGFilterPrimitiveStandardAttributes>;
> const SVGPropertyRegistry& propertyRegistry() const final { return m_propertyRegistry; }
> 
>- void parseAttribute(const QualifiedName&, const AtomicString&) override;
>+ void parseAttribute(const QualifiedName&, const AtomString&) override;
> void svgAttributeChanged(const QualifiedName&) override;
> 
> RefPtr<FilterEffect> build(SVGFilterBuilder*, Filter&) const override;
>diff --git a/Source/WebCore/svg/SVGFEGaussianBlurElement.cpp b/Source/WebCore/svg/SVGFEGaussianBlurElement.cpp
>index 95b6683ca11baee7cc2719dbcd31df7aba5e4519..5ef6c376f5f507b9fc9d7e622754b61dce5999a2 100644
>--- a/Source/WebCore/svg/SVGFEGaussianBlurElement.cpp
>+++ b/Source/WebCore/svg/SVGFEGaussianBlurElement.cpp
>@@ -57,7 +57,7 @@ void SVGFEGaussianBlurElement::setStdDeviation(float x, float y)
> invalidate();
> }
> 
>-void SVGFEGaussianBlurElement::parseAttribute(const QualifiedName& name, const AtomicString& value)
>+void SVGFEGaussianBlurElement::parseAttribute(const QualifiedName& name, const AtomString& value)
> {
> if (name == SVGNames::stdDeviationAttr) {
> float x, y;
>diff --git a/Source/WebCore/svg/SVGFEGaussianBlurElement.h b/Source/WebCore/svg/SVGFEGaussianBlurElement.h
>index b2d5e83cecd6da463b4a8c059f4f30ec2a4b5365..d89e1a748fb2c509e214fe94ae41001ce48ee0b2 100644
>--- a/Source/WebCore/svg/SVGFEGaussianBlurElement.h
>+++ b/Source/WebCore/svg/SVGFEGaussianBlurElement.h
>@@ -50,7 +50,7 @@ private:
> using PropertyRegistry = SVGPropertyOwnerRegistry<SVGFEGaussianBlurElement, SVGFilterPrimitiveStandardAttributes>;
> const SVGPropertyRegistry& propertyRegistry() const final { return m_propertyRegistry; }
> 
>- void parseAttribute(const QualifiedName&, const AtomicString&) override;
>+ void parseAttribute(const QualifiedName&, const AtomString&) override;
> void svgAttributeChanged(const QualifiedName&) override;
> 
> RefPtr<FilterEffect> build(SVGFilterBuilder*, Filter&) const override;
>diff --git a/Source/WebCore/svg/SVGFEImageElement.cpp b/Source/WebCore/svg/SVGFEImageElement.cpp
>index bf3f38f444ece010d87a48ad07cefc8ae3d224d9..f43217017230b1d14c7aa1bb2e66437a3dfa0b1d 100644
>--- a/Source/WebCore/svg/SVGFEImageElement.cpp
>+++ b/Source/WebCore/svg/SVGFEImageElement.cpp
>@@ -115,7 +115,7 @@ void SVGFEImageElement::buildPendingResource()
> invalidate();
> }
> 
>-void SVGFEImageElement::parseAttribute(const QualifiedName& name, const AtomicString& value)
>+void SVGFEImageElement::parseAttribute(const QualifiedName& name, const AtomString& value)
> {
> if (name == SVGNames::preserveAspectRatioAttr) {
> SVGPreserveAspectRatioValue preserveAspectRatio;
>diff --git a/Source/WebCore/svg/SVGFEImageElement.h b/Source/WebCore/svg/SVGFEImageElement.h
>index 7624990b358ab527b4d19e57f9dcdcebf9f5310e..0b868b3cc5a856eea9ddb4c9618576fe77fe2410 100644
>--- a/Source/WebCore/svg/SVGFEImageElement.h
>+++ b/Source/WebCore/svg/SVGFEImageElement.h
>@@ -48,7 +48,7 @@ private:
> using PropertyRegistry = SVGPropertyOwnerRegistry<SVGFEImageElement, SVGFilterPrimitiveStandardAttributes, SVGExternalResourcesRequired, SVGURIReference>;
> const SVGPropertyRegistry& propertyRegistry() const final { return m_propertyRegistry; }
> 
>- void parseAttribute(const QualifiedName&, const AtomicString&) override;
>+ void parseAttribute(const QualifiedName&, const AtomString&) override;
> void svgAttributeChanged(const QualifiedName&) override;
> 
> void notifyFinished(CachedResource&) final;
>diff --git a/Source/WebCore/svg/SVGFELightElement.cpp b/Source/WebCore/svg/SVGFELightElement.cpp
>index 2e6b0ec26a80911cc415fa38fd6fd6e48cee2538..100289407e9371dd201cfd13a9b6f39ca1d50644 100644
>--- a/Source/WebCore/svg/SVGFELightElement.cpp
>+++ b/Source/WebCore/svg/SVGFELightElement.cpp
>@@ -67,7 +67,7 @@ SVGFELightElement* SVGFELightElement::findLightElement(const SVGElement* svgElem
> return nullptr;
> }
> 
>-void SVGFELightElement::parseAttribute(const QualifiedName& name, const AtomicString& value)
>+void SVGFELightElement::parseAttribute(const QualifiedName& name, const AtomString& value)
> {
> if (name == SVGNames::azimuthAttr) {
> m_azimuth->setBaseValInternal(value.toFloat());
>diff --git a/Source/WebCore/svg/SVGFELightElement.h b/Source/WebCore/svg/SVGFELightElement.h
>index 2534d1d7ac9d54e8d06445e7a7e2f85abd0b4c5e..cd0bfb9edcfd7b4e1af39b55edbbbd784aaea89d 100644
>--- a/Source/WebCore/svg/SVGFELightElement.h
>+++ b/Source/WebCore/svg/SVGFELightElement.h
>@@ -66,7 +66,7 @@ private:
> using PropertyRegistry = SVGPropertyOwnerRegistry<SVGFELightElement, SVGElement>;
> const SVGPropertyRegistry& propertyRegistry() const final { return m_propertyRegistry; }
> 
>- void parseAttribute(const QualifiedName&, const AtomicString&) override;
>+ void parseAttribute(const QualifiedName&, const AtomString&) override;
> void svgAttributeChanged(const QualifiedName&) override;
> void childrenChanged(const ChildChange&) override;
> 
>diff --git a/Source/WebCore/svg/SVGFEMergeNodeElement.cpp b/Source/WebCore/svg/SVGFEMergeNodeElement.cpp
>index e82bbfc55f675d709b4683f2654e841cbca4affe..4be907826dba06193684e0a4daf5ba2b5fa94afa 100644
>--- a/Source/WebCore/svg/SVGFEMergeNodeElement.cpp
>+++ b/Source/WebCore/svg/SVGFEMergeNodeElement.cpp
>@@ -48,7 +48,7 @@ Ref<SVGFEMergeNodeElement> SVGFEMergeNodeElement::create(const QualifiedName& ta
> return adoptRef(*new SVGFEMergeNodeElement(tagName, document));
> }
> 
>-void SVGFEMergeNodeElement::parseAttribute(const QualifiedName& name, const AtomicString& value)
>+void SVGFEMergeNodeElement::parseAttribute(const QualifiedName& name, const AtomString& value)
> {
> if (name == SVGNames::inAttr) {
> m_in1->setBaseValInternal(value);
>diff --git a/Source/WebCore/svg/SVGFEMergeNodeElement.h b/Source/WebCore/svg/SVGFEMergeNodeElement.h
>index 8da92361408a23b88f1a6af04b7a532b2a9cb070..a9d2c074c50f9997b886579a6caef82694db1842 100644
>--- a/Source/WebCore/svg/SVGFEMergeNodeElement.h
>+++ b/Source/WebCore/svg/SVGFEMergeNodeElement.h
>@@ -39,7 +39,7 @@ private:
> using PropertyRegistry = SVGPropertyOwnerRegistry<SVGFEMergeNodeElement, SVGElement>;
> const SVGPropertyRegistry& propertyRegistry() const final { return m_propertyRegistry; }
> 
>- void parseAttribute(const QualifiedName&, const AtomicString&) final;
>+ void parseAttribute(const QualifiedName&, const AtomString&) final;
> void svgAttributeChanged(const QualifiedName&) final;
> 
> bool rendererIsNeeded(const RenderStyle&) final { return false; }
>diff --git a/Source/WebCore/svg/SVGFEMorphologyElement.cpp b/Source/WebCore/svg/SVGFEMorphologyElement.cpp
>index 176305cadf3e3a4dfdb3925fb9f64a0bfee94a11..05d8a52bd493fc8a6b880d3a31c0ce748902546e 100644
>--- a/Source/WebCore/svg/SVGFEMorphologyElement.cpp
>+++ b/Source/WebCore/svg/SVGFEMorphologyElement.cpp
>@@ -56,7 +56,7 @@ void SVGFEMorphologyElement::setRadius(float x, float y)
> invalidate();
> }
> 
>-void SVGFEMorphologyElement::parseAttribute(const QualifiedName& name, const AtomicString& value)
>+void SVGFEMorphologyElement::parseAttribute(const QualifiedName& name, const AtomString& value)
> {
> if (name == SVGNames::operatorAttr) {
> MorphologyOperatorType propertyValue = SVGPropertyTraits<MorphologyOperatorType>::fromString(value);
>diff --git a/Source/WebCore/svg/SVGFEMorphologyElement.h b/Source/WebCore/svg/SVGFEMorphologyElement.h
>index 99933555361a20541577b11245b48239b6d33b2d..1a9088b75cf8d85ae38f293e11198a66f66aa669 100644
>--- a/Source/WebCore/svg/SVGFEMorphologyElement.h
>+++ b/Source/WebCore/svg/SVGFEMorphologyElement.h
>@@ -77,7 +77,7 @@ private:
> using PropertyRegistry = SVGPropertyOwnerRegistry<SVGFEMorphologyElement, SVGFilterPrimitiveStandardAttributes>;
> const SVGPropertyRegistry& propertyRegistry() const final { return m_propertyRegistry; }
> 
>- void parseAttribute(const QualifiedName&, const AtomicString&) override;
>+ void parseAttribute(const QualifiedName&, const AtomString&) override;
> void svgAttributeChanged(const QualifiedName&) override;
> 
> bool setFilterEffectAttribute(FilterEffect*, const QualifiedName&) override;
>diff --git a/Source/WebCore/svg/SVGFEOffsetElement.cpp b/Source/WebCore/svg/SVGFEOffsetElement.cpp
>index db10de86314f381e748161054bb03384cb2142f4..485c0609d95705206ce3bf0a8de36e83a9b6c0f7 100644
>--- a/Source/WebCore/svg/SVGFEOffsetElement.cpp
>+++ b/Source/WebCore/svg/SVGFEOffsetElement.cpp
>@@ -50,7 +50,7 @@ Ref<SVGFEOffsetElement> SVGFEOffsetElement::create(const QualifiedName& tagName,
> return adoptRef(*new SVGFEOffsetElement(tagName, document));
> }
> 
>-void SVGFEOffsetElement::parseAttribute(const QualifiedName& name, const AtomicString& value)
>+void SVGFEOffsetElement::parseAttribute(const QualifiedName& name, const AtomString& value)
> {
> if (name == SVGNames::dxAttr) {
> m_dx->setBaseValInternal(value.toFloat());
>diff --git a/Source/WebCore/svg/SVGFEOffsetElement.h b/Source/WebCore/svg/SVGFEOffsetElement.h
>index 3d8d77dbef7839109e3b0bc70af01a9f0e62ba54..57473dcc72db67b125ea2ed465e35b5737049bee 100644
>--- a/Source/WebCore/svg/SVGFEOffsetElement.h
>+++ b/Source/WebCore/svg/SVGFEOffsetElement.h
>@@ -44,7 +44,7 @@ private:
> using PropertyRegistry = SVGPropertyOwnerRegistry<SVGFEOffsetElement, SVGFilterPrimitiveStandardAttributes>;
> const SVGPropertyRegistry& propertyRegistry() const final { return m_propertyRegistry; }
> 
>- void parseAttribute(const QualifiedName&, const AtomicString&) override;
>+ void parseAttribute(const QualifiedName&, const AtomString&) override;
> void svgAttributeChanged(const QualifiedName&) override;
> 
> RefPtr<FilterEffect> build(SVGFilterBuilder*, Filter&) const override;
>diff --git a/Source/WebCore/svg/SVGFESpecularLightingElement.cpp b/Source/WebCore/svg/SVGFESpecularLightingElement.cpp
>index 767381e381a7688e68abab2d057d3893afa08c39..1e93823d9eb8eb2f63ead573636366cf1a36ef65 100644
>--- a/Source/WebCore/svg/SVGFESpecularLightingElement.cpp
>+++ b/Source/WebCore/svg/SVGFESpecularLightingElement.cpp
>@@ -55,7 +55,7 @@ Ref<SVGFESpecularLightingElement> SVGFESpecularLightingElement::create(const Qua
> return adoptRef(*new SVGFESpecularLightingElement(tagName, document));
> }
> 
>-void SVGFESpecularLightingElement::parseAttribute(const QualifiedName& name, const AtomicString& value)
>+void SVGFESpecularLightingElement::parseAttribute(const QualifiedName& name, const AtomString& value)
> {
> if (name == SVGNames::inAttr) {
> m_in1->setBaseValInternal(value);
>diff --git a/Source/WebCore/svg/SVGFESpecularLightingElement.h b/Source/WebCore/svg/SVGFESpecularLightingElement.h
>index ce23cb5ae22c3f751e115c7082aba158b5a3cc09..897b8de156d1c79a1d3fd8b3118e2ab63b47b146 100644
>--- a/Source/WebCore/svg/SVGFESpecularLightingElement.h
>+++ b/Source/WebCore/svg/SVGFESpecularLightingElement.h
>@@ -54,7 +54,7 @@ private:
> using PropertyRegistry = SVGPropertyOwnerRegistry<SVGFESpecularLightingElement, SVGFilterPrimitiveStandardAttributes>;
> const SVGPropertyRegistry& propertyRegistry() const final { return m_propertyRegistry; }
> 
>- void parseAttribute(const QualifiedName&, const AtomicString&) override;
>+ void parseAttribute(const QualifiedName&, const AtomString&) override;
> void svgAttributeChanged(const QualifiedName&) override;
> 
> bool setFilterEffectAttribute(FilterEffect*, const QualifiedName&) override;
>diff --git a/Source/WebCore/svg/SVGFETileElement.cpp b/Source/WebCore/svg/SVGFETileElement.cpp
>index 9887e4a38081ad617d40fd7b6d0f7739e73d59c6..5c59d78ed06d602cdaad43440f505b72682c9474 100644
>--- a/Source/WebCore/svg/SVGFETileElement.cpp
>+++ b/Source/WebCore/svg/SVGFETileElement.cpp
>@@ -49,7 +49,7 @@ Ref<SVGFETileElement> SVGFETileElement::create(const QualifiedName& tagName, Doc
> return adoptRef(*new SVGFETileElement(tagName, document));
> }
> 
>-void SVGFETileElement::parseAttribute(const QualifiedName& name, const AtomicString& value)
>+void SVGFETileElement::parseAttribute(const QualifiedName& name, const AtomString& value)
> {
> if (name == SVGNames::inAttr) {
> m_in1->setBaseValInternal(value);
>diff --git a/Source/WebCore/svg/SVGFETileElement.h b/Source/WebCore/svg/SVGFETileElement.h
>index adcc7a8d304cb332d9bae7ba582849c261f4b4d8..45b3271851d7fc0dc2d3bcc879a22dc42a33a91f 100644
>--- a/Source/WebCore/svg/SVGFETileElement.h
>+++ b/Source/WebCore/svg/SVGFETileElement.h
>@@ -39,7 +39,7 @@ private:
> using PropertyRegistry = SVGPropertyOwnerRegistry<SVGFETileElement, SVGFilterPrimitiveStandardAttributes>;
> const SVGPropertyRegistry& propertyRegistry() const final { return m_propertyRegistry; }
> 
>- void parseAttribute(const QualifiedName&, const AtomicString&) override;
>+ void parseAttribute(const QualifiedName&, const AtomString&) override;
> void svgAttributeChanged(const QualifiedName&) override;
> 
> RefPtr<FilterEffect> build(SVGFilterBuilder*, Filter&) const override;
>diff --git a/Source/WebCore/svg/SVGFETurbulenceElement.cpp b/Source/WebCore/svg/SVGFETurbulenceElement.cpp
>index 3e35d220e48a1ac5757f937bd33d06ad4d0d1eb6..f2628bbd0d37bebf4b458beb170f7fee9794608c 100644
>--- a/Source/WebCore/svg/SVGFETurbulenceElement.cpp
>+++ b/Source/WebCore/svg/SVGFETurbulenceElement.cpp
>@@ -50,7 +50,7 @@ Ref<SVGFETurbulenceElement> SVGFETurbulenceElement::create(const QualifiedName&
> return adoptRef(*new SVGFETurbulenceElement(tagName, document));
> }
> 
>-void SVGFETurbulenceElement::parseAttribute(const QualifiedName& name, const AtomicString& value)
>+void SVGFETurbulenceElement::parseAttribute(const QualifiedName& name, const AtomString& value)
> {
> if (name == SVGNames::typeAttr) {
> TurbulenceType propertyValue = SVGPropertyTraits<TurbulenceType>::fromString(value);
>diff --git a/Source/WebCore/svg/SVGFETurbulenceElement.h b/Source/WebCore/svg/SVGFETurbulenceElement.h
>index cca7f85783f4886ec981f6fa1db962b9cb416c2e..bf9da22ad42e410a10435e0a40e34267769e198a 100644
>--- a/Source/WebCore/svg/SVGFETurbulenceElement.h
>+++ b/Source/WebCore/svg/SVGFETurbulenceElement.h
>@@ -115,7 +115,7 @@ private:
> using PropertyRegistry = SVGPropertyOwnerRegistry<SVGFETurbulenceElement, SVGFilterPrimitiveStandardAttributes>;
> const SVGPropertyRegistry& propertyRegistry() const final { return m_propertyRegistry; }
> 
>- void parseAttribute(const QualifiedName&, const AtomicString&) override;
>+ void parseAttribute(const QualifiedName&, const AtomString&) override;
> void svgAttributeChanged(const QualifiedName&) override;
> 
> bool setFilterEffectAttribute(FilterEffect*, const QualifiedName& attrName) override;
>diff --git a/Source/WebCore/svg/SVGFilterElement.cpp b/Source/WebCore/svg/SVGFilterElement.cpp
>index 7655c07697570396d9e7b1e1a76dcd0ca7f8affc..24c6c52f4838f72ac3b8e6c794a8b5b7970271bc 100644
>--- a/Source/WebCore/svg/SVGFilterElement.cpp
>+++ b/Source/WebCore/svg/SVGFilterElement.cpp
>@@ -63,7 +63,7 @@ Ref<SVGFilterElement> SVGFilterElement::create(const QualifiedName& tagName, Doc
> return adoptRef(*new SVGFilterElement(tagName, document));
> }
> 
>-void SVGFilterElement::parseAttribute(const QualifiedName& name, const AtomicString& value)
>+void SVGFilterElement::parseAttribute(const QualifiedName& name, const AtomString& value)
> {
> SVGParsingError parseError = NoError;
> 
>diff --git a/Source/WebCore/svg/SVGFilterElement.h b/Source/WebCore/svg/SVGFilterElement.h
>index e1f2f5bcec563df15c27f9fd4fe44bc88a34657c..1589a6c42bda877145d5e0737ec8fa1f4abceedf 100644
>--- a/Source/WebCore/svg/SVGFilterElement.h
>+++ b/Source/WebCore/svg/SVGFilterElement.h
>@@ -55,7 +55,7 @@ private:
> using PropertyRegistry = SVGPropertyOwnerRegistry<SVGFilterElement, SVGElement, SVGExternalResourcesRequired, SVGURIReference>;
> const SVGPropertyRegistry& propertyRegistry() const final { return m_propertyRegistry; }
> 
>- void parseAttribute(const QualifiedName&, const AtomicString&) final;
>+ void parseAttribute(const QualifiedName&, const AtomString&) final;
> void svgAttributeChanged(const QualifiedName&) final;
> void childrenChanged(const ChildChange&) final;
> 
>diff --git a/Source/WebCore/svg/SVGFilterPrimitiveStandardAttributes.cpp b/Source/WebCore/svg/SVGFilterPrimitiveStandardAttributes.cpp
>index 35cec9cb667703858849a2b91e5e982c232d6e86..364cb280f3279f20f526a61c8a323103cc47bec8 100644
>--- a/Source/WebCore/svg/SVGFilterPrimitiveStandardAttributes.cpp
>+++ b/Source/WebCore/svg/SVGFilterPrimitiveStandardAttributes.cpp
>@@ -46,7 +46,7 @@ SVGFilterPrimitiveStandardAttributes::SVGFilterPrimitiveStandardAttributes(const
> });
> }
> 
>-void SVGFilterPrimitiveStandardAttributes::parseAttribute(const QualifiedName& name, const AtomicString& value)
>+void SVGFilterPrimitiveStandardAttributes::parseAttribute(const QualifiedName& name, const AtomString& value)
> {
> SVGParsingError parseError = NoError;
> 
>diff --git a/Source/WebCore/svg/SVGFilterPrimitiveStandardAttributes.h b/Source/WebCore/svg/SVGFilterPrimitiveStandardAttributes.h
>index eb25b53a94d8e5fdd89285b583b732313e232010..c2816da3635d06563b91c83508bd8138cb39ab94 100644
>--- a/Source/WebCore/svg/SVGFilterPrimitiveStandardAttributes.h
>+++ b/Source/WebCore/svg/SVGFilterPrimitiveStandardAttributes.h
>@@ -59,7 +59,7 @@ public:
> protected:
> SVGFilterPrimitiveStandardAttributes(const QualifiedName&, Document&);
> 
>- void parseAttribute(const QualifiedName&, const AtomicString&) override;
>+ void parseAttribute(const QualifiedName&, const AtomString&) override;
> void svgAttributeChanged(const QualifiedName&) override;
> void childrenChanged(const ChildChange&) override;
> 
>diff --git a/Source/WebCore/svg/SVGFitToViewBox.cpp b/Source/WebCore/svg/SVGFitToViewBox.cpp
>index d15e3546c1213e00dfa57c81b4a00b2efe30a973..1f47d368e9031f44a0be0fd24350c72d141f6549 100644
>--- a/Source/WebCore/svg/SVGFitToViewBox.cpp
>+++ b/Source/WebCore/svg/SVGFitToViewBox.cpp
>@@ -63,7 +63,7 @@ void SVGFitToViewBox::reset()
> resetPreserveAspectRatio();
> }
> 
>-bool SVGFitToViewBox::parseAttribute(const QualifiedName& name, const AtomicString& value)
>+bool SVGFitToViewBox::parseAttribute(const QualifiedName& name, const AtomString& value)
> {
> if (name == SVGNames::viewBoxAttr) {
> FloatRect viewBox;
>@@ -84,7 +84,7 @@ bool SVGFitToViewBox::parseAttribute(const QualifiedName& name, const AtomicStri
> return false;
> }
> 
>-bool SVGFitToViewBox::parseViewBox(const AtomicString& value, FloatRect& viewBox)
>+bool SVGFitToViewBox::parseViewBox(const AtomString& value, FloatRect& viewBox)
> {
> auto upconvertedCharacters = StringView(value).upconvertedCharacters();
> const UChar* characters = upconvertedCharacters;
>diff --git a/Source/WebCore/svg/SVGFitToViewBox.h b/Source/WebCore/svg/SVGFitToViewBox.h
>index 7cc4231416019319d7e2b4d2d7d7636c379b8a4f..907d655cd1b1b9b372a20f8189236042e20f0fd0 100644
>--- a/Source/WebCore/svg/SVGFitToViewBox.h
>+++ b/Source/WebCore/svg/SVGFitToViewBox.h
>@@ -64,8 +64,8 @@ protected:
> static bool isKnownAttribute(const QualifiedName& attributeName) { return PropertyRegistry::isKnownAttribute(attributeName); }
> 
> void reset();
>- bool parseAttribute(const QualifiedName&, const AtomicString&);
>- bool parseViewBox(const AtomicString& value, FloatRect& viewBox);
>+ bool parseAttribute(const QualifiedName&, const AtomString&);
>+ bool parseViewBox(const AtomString& value, FloatRect& viewBox);
> bool parseViewBox(const UChar*& start, const UChar* end, FloatRect& viewBox, bool validate = true);
> 
> private:
>diff --git a/Source/WebCore/svg/SVGFontFaceElement.cpp b/Source/WebCore/svg/SVGFontFaceElement.cpp
>index 33b6b78a851124c3d3b7cfe79b50958a35b0ec5c..ed51c07f5911dd9fe717a616fc489b9a9962a2cf 100644
>--- a/Source/WebCore/svg/SVGFontFaceElement.cpp
>+++ b/Source/WebCore/svg/SVGFontFaceElement.cpp
>@@ -71,7 +71,7 @@ Ref<SVGFontFaceElement> SVGFontFaceElement::create(const QualifiedName& tagName,
> return adoptRef(*new SVGFontFaceElement(tagName, document));
> }
> 
>-void SVGFontFaceElement::parseAttribute(const QualifiedName& name, const AtomicString& value)
>+void SVGFontFaceElement::parseAttribute(const QualifiedName& name, const AtomString& value)
> { 
> CSSPropertyID propertyId = cssPropertyIdForSVGAttributeName(name);
> if (propertyId > 0) {
>@@ -98,7 +98,7 @@ void SVGFontFaceElement::parseAttribute(const QualifiedName& name, const AtomicS
> 
> unsigned SVGFontFaceElement::unitsPerEm() const
> {
>- const AtomicString& valueString = attributeWithoutSynchronization(units_per_emAttr);
>+ const AtomString& valueString = attributeWithoutSynchronization(units_per_emAttr);
> if (valueString.isEmpty())
> return FontMetrics::defaultUnitsPerEm;
> 
>@@ -160,7 +160,7 @@ float SVGFontFaceElement::verticalOriginX() const
> // Spec: The default X-coordinate in the font coordinate system of the origin of a glyph to be used when
> // drawing vertically oriented text. If the attribute is not specified, the effect is as if the attribute
> // were set to half of the effective value of attribute horiz-adv-x.
>- const AtomicString& value = m_fontElement->attributeWithoutSynchronization(vert_origin_xAttr);
>+ const AtomString& value = m_fontElement->attributeWithoutSynchronization(vert_origin_xAttr);
> if (value.isEmpty())
> return horizontalAdvanceX() / 2.0f;
> 
>@@ -175,7 +175,7 @@ float SVGFontFaceElement::verticalOriginY() const
> // Spec: The default Y-coordinate in the font coordinate system of the origin of a glyph to be used when
> // drawing vertically oriented text. If the attribute is not specified, the effect is as if the attribute
> // were set to the position specified by the font's ascent attribute. 
>- const AtomicString& value = m_fontElement->attributeWithoutSynchronization(vert_origin_yAttr);
>+ const AtomString& value = m_fontElement->attributeWithoutSynchronization(vert_origin_yAttr);
> if (value.isEmpty())
> return ascent();
> 
>@@ -189,7 +189,7 @@ float SVGFontFaceElement::verticalAdvanceY() const
> 
> // Spec: The default vertical advance after rendering a glyph in vertical orientation. If the attribute is
> // not specified, the effect is as if a value equivalent of one em were specified (see units-per-em). 
>- const AtomicString& value = m_fontElement->attributeWithoutSynchronization(vert_adv_yAttr);
>+ const AtomString& value = m_fontElement->attributeWithoutSynchronization(vert_adv_yAttr);
> if (value.isEmpty())
> return 1.0f;
> 
>@@ -202,12 +202,12 @@ int SVGFontFaceElement::ascent() const
> // unaccented height of the font within the font coordinate system. If the attribute is not specified,
> // the effect is as if the attribute were set to the difference between the units-per-em value and the
> // vert-origin-y value for the corresponding font.
>- const AtomicString& ascentValue = attributeWithoutSynchronization(ascentAttr);
>+ const AtomString& ascentValue = attributeWithoutSynchronization(ascentAttr);
> if (!ascentValue.isEmpty())
> return static_cast<int>(ceilf(ascentValue.toFloat()));
> 
> if (m_fontElement) {
>- const AtomicString& vertOriginY = m_fontElement->attributeWithoutSynchronization(vert_origin_yAttr);
>+ const AtomString& vertOriginY = m_fontElement->attributeWithoutSynchronization(vert_origin_yAttr);
> if (!vertOriginY.isEmpty())
> return static_cast<int>(unitsPerEm()) - static_cast<int>(ceilf(vertOriginY.toFloat()));
> }
>@@ -221,7 +221,7 @@ int SVGFontFaceElement::descent() const
> // Spec: Same syntax and semantics as the 'descent' descriptor within an @font-face rule. The maximum
> // unaccented depth of the font within the font coordinate system. If the attribute is not specified,
> // the effect is as if the attribute were set to the vert-origin-y value for the corresponding font.
>- const AtomicString& descentValue = attributeWithoutSynchronization(descentAttr);
>+ const AtomString& descentValue = attributeWithoutSynchronization(descentAttr);
> if (!descentValue.isEmpty()) {
> // 14 different W3C SVG 1.1 testcases use a negative descent value,
> // where a positive was meant to be used Including:
>@@ -231,7 +231,7 @@ int SVGFontFaceElement::descent() const
> }
> 
> if (m_fontElement) {
>- const AtomicString& vertOriginY = m_fontElement->attributeWithoutSynchronization(vert_origin_yAttr);
>+ const AtomString& vertOriginY = m_fontElement->attributeWithoutSynchronization(vert_origin_yAttr);
> if (!vertOriginY.isEmpty())
> return static_cast<int>(ceilf(vertOriginY.toFloat()));
> }
>diff --git a/Source/WebCore/svg/SVGFontFaceElement.h b/Source/WebCore/svg/SVGFontFaceElement.h
>index 8f8ba5892be280798ee41dc00bd1b3cb7d3098a9..9da05f0997e4610ebb3e19d1bf0baa79ace2fc18 100644
>--- a/Source/WebCore/svg/SVGFontFaceElement.h
>+++ b/Source/WebCore/svg/SVGFontFaceElement.h
>@@ -57,7 +57,7 @@ private:
> SVGFontFaceElement(const QualifiedName&, Document&);
> ~SVGFontFaceElement();
> 
>- void parseAttribute(const QualifiedName&, const AtomicString&) final;
>+ void parseAttribute(const QualifiedName&, const AtomString&) final;
> 
> void childrenChanged(const ChildChange&) final;
> InsertedIntoAncestorResult insertedIntoAncestor(InsertionType, ContainerNode&) final;
>diff --git a/Source/WebCore/svg/SVGFontFaceUriElement.cpp b/Source/WebCore/svg/SVGFontFaceUriElement.cpp
>index 4c2225d5963b0a5cb36597e73e162f3b8a6df4b8..75cbde8c33c2be9d019a7062cddf35909800d720 100644
>--- a/Source/WebCore/svg/SVGFontFaceUriElement.cpp
>+++ b/Source/WebCore/svg/SVGFontFaceUriElement.cpp
>@@ -59,12 +59,12 @@ SVGFontFaceUriElement::~SVGFontFaceUriElement()
> Ref<CSSFontFaceSrcValue> SVGFontFaceUriElement::srcValue() const
> {
> auto src = CSSFontFaceSrcValue::create(getAttribute(SVGNames::hrefAttr, XLinkNames::hrefAttr), LoadedFromOpaqueSource::No);
>- AtomicString value(attributeWithoutSynchronization(formatAttr));
>+ AtomString value(attributeWithoutSynchronization(formatAttr));
> src.get().setFormat(value.isEmpty() ? "svg" : value); // Default format
> return src;
> }
> 
>-void SVGFontFaceUriElement::parseAttribute(const QualifiedName& name, const AtomicString& value)
>+void SVGFontFaceUriElement::parseAttribute(const QualifiedName& name, const AtomString& value)
> {
> if (name == SVGNames::hrefAttr || name == XLinkNames::hrefAttr)
> loadFont();
>@@ -101,7 +101,7 @@ void SVGFontFaceUriElement::loadFont()
> if (m_cachedFont)
> m_cachedFont->removeClient(*this);
> 
>- const AtomicString& href = getAttribute(SVGNames::hrefAttr, XLinkNames::hrefAttr);
>+ const AtomString& href = getAttribute(SVGNames::hrefAttr, XLinkNames::hrefAttr);
> if (!href.isNull()) {
> ResourceLoaderOptions options = CachedResourceLoader::defaultCachedResourceOptions();
> options.contentSecurityPolicyImposition = isInUserAgentShadowTree() ? ContentSecurityPolicyImposition::SkipPolicyCheck : ContentSecurityPolicyImposition::DoPolicyCheck;
>diff --git a/Source/WebCore/svg/SVGFontFaceUriElement.h b/Source/WebCore/svg/SVGFontFaceUriElement.h
>index c78a2bca97f4fa359df1a67f0ede0048199810b3..48fcf2f88778bd03d2b7e30bb52fe07043881675 100644
>--- a/Source/WebCore/svg/SVGFontFaceUriElement.h
>+++ b/Source/WebCore/svg/SVGFontFaceUriElement.h
>@@ -41,7 +41,7 @@ public:
> private:
> SVGFontFaceUriElement(const QualifiedName&, Document&);
> 
>- void parseAttribute(const QualifiedName&, const AtomicString&) final;
>+ void parseAttribute(const QualifiedName&, const AtomString&) final;
> void childrenChanged(const ChildChange&) final;
> InsertedIntoAncestorResult insertedIntoAncestor(InsertionType, ContainerNode&) final;
> bool rendererIsNeeded(const RenderStyle&) final { return false; }
>diff --git a/Source/WebCore/svg/SVGForeignObjectElement.cpp b/Source/WebCore/svg/SVGForeignObjectElement.cpp
>index ba690ed6e2520aa8b726d8ba33da9fa04cbc241f..5acd5fcb31980de7b8e66b08d3c5d35b607b2829 100644
>--- a/Source/WebCore/svg/SVGForeignObjectElement.cpp
>+++ b/Source/WebCore/svg/SVGForeignObjectElement.cpp
>@@ -54,7 +54,7 @@ Ref<SVGForeignObjectElement> SVGForeignObjectElement::create(const QualifiedName
> return adoptRef(*new SVGForeignObjectElement(tagName, document));
> }
> 
>-void SVGForeignObjectElement::parseAttribute(const QualifiedName& name, const AtomicString& value)
>+void SVGForeignObjectElement::parseAttribute(const QualifiedName& name, const AtomString& value)
> {
> SVGParsingError parseError = NoError;
> 
>diff --git a/Source/WebCore/svg/SVGForeignObjectElement.h b/Source/WebCore/svg/SVGForeignObjectElement.h
>index fb57468a06fba108a512f9be5e26011b2879f6f7..02a194c417a7ab77304148277d3f9e649fb068a4 100644
>--- a/Source/WebCore/svg/SVGForeignObjectElement.h
>+++ b/Source/WebCore/svg/SVGForeignObjectElement.h
>@@ -47,7 +47,7 @@ private:
> using PropertyRegistry = SVGPropertyOwnerRegistry<SVGForeignObjectElement, SVGGraphicsElement, SVGExternalResourcesRequired>;
> const SVGPropertyRegistry& propertyRegistry() const final { return m_propertyRegistry; }
> 
>- void parseAttribute(const QualifiedName&, const AtomicString&) final;
>+ void parseAttribute(const QualifiedName&, const AtomString&) final;
> void svgAttributeChanged(const QualifiedName&) final;
> 
> bool rendererIsNeeded(const RenderStyle&) final;
>diff --git a/Source/WebCore/svg/SVGGElement.cpp b/Source/WebCore/svg/SVGGElement.cpp
>index 7df6ea6dcf21d123a0130775c90612af6e842665..7c050e0fc34b4f212c80b917ae83324e2d762363 100644
>--- a/Source/WebCore/svg/SVGGElement.cpp
>+++ b/Source/WebCore/svg/SVGGElement.cpp
>@@ -50,7 +50,7 @@ Ref<SVGGElement> SVGGElement::create(Document& document)
> return create(SVGNames::gTag, document);
> }
> 
>-void SVGGElement::parseAttribute(const QualifiedName& name, const AtomicString& value)
>+void SVGGElement::parseAttribute(const QualifiedName& name, const AtomString& value)
> {
> SVGGraphicsElement::parseAttribute(name, value);
> SVGExternalResourcesRequired::parseAttribute(name, value);
>diff --git a/Source/WebCore/svg/SVGGElement.h b/Source/WebCore/svg/SVGGElement.h
>index cb206ae34ad2cbbbf34801c12ae40197902b6f5f..668cee9975236f0916af90e4f72a422fffb92c6e 100644
>--- a/Source/WebCore/svg/SVGGElement.h
>+++ b/Source/WebCore/svg/SVGGElement.h
>@@ -40,7 +40,7 @@ private:
> using PropertyRegistry = SVGPropertyOwnerRegistry<SVGGElement, SVGGraphicsElement, SVGExternalResourcesRequired>;
> const SVGPropertyRegistry& propertyRegistry() const final { return m_propertyRegistry; }
> 
>- void parseAttribute(const QualifiedName&, const AtomicString&) final;
>+ void parseAttribute(const QualifiedName&, const AtomString&) final;
> void svgAttributeChanged(const QualifiedName&) final;
> 
> bool isValid() const final { return SVGTests::isValid(); }
>diff --git a/Source/WebCore/svg/SVGGeometryElement.cpp b/Source/WebCore/svg/SVGGeometryElement.cpp
>index bdd7a02754ace5418ad9e980d13381e69edfac56..b3d301c0f0f7909a5c9b81288b1705087a5906f8 100644
>--- a/Source/WebCore/svg/SVGGeometryElement.cpp
>+++ b/Source/WebCore/svg/SVGGeometryElement.cpp
>@@ -92,7 +92,7 @@ bool SVGGeometryElement::isPointInStroke(DOMPointInit&& pointInit)
> return renderer->isPointInStroke(point);
> }
> 
>-void SVGGeometryElement::parseAttribute(const QualifiedName& name, const AtomicString& value)
>+void SVGGeometryElement::parseAttribute(const QualifiedName& name, const AtomString& value)
> {
> if (name == SVGNames::pathLengthAttr) {
> m_pathLength->setBaseValInternal(value.toFloat());
>diff --git a/Source/WebCore/svg/SVGGeometryElement.h b/Source/WebCore/svg/SVGGeometryElement.h
>index d24e622d1e02a259d03bc8d6ff52d1f06cb86f56..555cb19943c185047cb35e40e397f61b0cd06b60 100644
>--- a/Source/WebCore/svg/SVGGeometryElement.h
>+++ b/Source/WebCore/svg/SVGGeometryElement.h
>@@ -48,7 +48,7 @@ public:
> protected:
> SVGGeometryElement(const QualifiedName&, Document&);
> 
>- void parseAttribute(const QualifiedName&, const AtomicString&) override;
>+ void parseAttribute(const QualifiedName&, const AtomString&) override;
> void svgAttributeChanged(const QualifiedName&) override;
> 
> private:
>diff --git a/Source/WebCore/svg/SVGGlyphRefElement.cpp b/Source/WebCore/svg/SVGGlyphRefElement.cpp
>index 51097e4c337c26f488832bb1bb554517554c9c6c..1c4568ae74839549ec650b15fde3782e8c28f23a 100644
>--- a/Source/WebCore/svg/SVGGlyphRefElement.cpp
>+++ b/Source/WebCore/svg/SVGGlyphRefElement.cpp
>@@ -28,7 +28,7 @@
> #include "SVGParserUtilities.h"
> #include "XLinkNames.h"
> #include <wtf/IsoMallocInlines.h>
>-#include <wtf/text/AtomicString.h>
>+#include <wtf/text/AtomString.h>
> 
> namespace WebCore {
> 
>@@ -56,7 +56,7 @@ bool SVGGlyphRefElement::hasValidGlyphElement(String& glyphName) const
> return is<SVGGlyphElement>(target.element);
> }
> 
>-static float parseFloat(const AtomicString& value)
>+static float parseFloat(const AtomString& value)
> {
> float result;
> if (!parseNumberFromString(value, result))
>@@ -64,7 +64,7 @@ static float parseFloat(const AtomicString& value)
> return result;
> }
> 
>-void SVGGlyphRefElement::parseAttribute(const QualifiedName& name, const AtomicString& value)
>+void SVGGlyphRefElement::parseAttribute(const QualifiedName& name, const AtomString& value)
> {
> // FIXME: Is the error handling in parseFloat correct for these attributes?
> if (name == SVGNames::xAttr)
>@@ -83,22 +83,22 @@ void SVGGlyphRefElement::parseAttribute(const QualifiedName& name, const AtomicS
> 
> void SVGGlyphRefElement::setX(float x)
> {
>- setAttribute(SVGNames::xAttr, AtomicString::number(x));
>+ setAttribute(SVGNames::xAttr, AtomString::number(x));
> }
> 
> void SVGGlyphRefElement::setY(float y)
> {
>- setAttribute(SVGNames::yAttr, AtomicString::number(y));
>+ setAttribute(SVGNames::yAttr, AtomString::number(y));
> }
> 
> void SVGGlyphRefElement::setDx(float dx)
> {
>- setAttribute(SVGNames::dxAttr, AtomicString::number(dx));
>+ setAttribute(SVGNames::dxAttr, AtomString::number(dx));
> }
> 
> void SVGGlyphRefElement::setDy(float dy)
> {
>- setAttribute(SVGNames::dyAttr, AtomicString::number(dy));
>+ setAttribute(SVGNames::dyAttr, AtomString::number(dy));
> }
> 
> }
>diff --git a/Source/WebCore/svg/SVGGlyphRefElement.h b/Source/WebCore/svg/SVGGlyphRefElement.h
>index be046ee73625aed90bcd7df56abe9e1d715d9869..b90eeb88f6c33dec5e86abd816811eaff8ea6160 100644
>--- a/Source/WebCore/svg/SVGGlyphRefElement.h
>+++ b/Source/WebCore/svg/SVGGlyphRefElement.h
>@@ -49,7 +49,7 @@ private:
> using PropertyRegistry = SVGPropertyOwnerRegistry<SVGGlyphRefElement, SVGElement, SVGURIReference>;
> const SVGPropertyRegistry& propertyRegistry() const final { return m_propertyRegistry; }
> 
>- void parseAttribute(const QualifiedName&, const AtomicString&) final;
>+ void parseAttribute(const QualifiedName&, const AtomString&) final;
> bool rendererIsNeeded(const RenderStyle&) final { return false; }
> 
> float m_x { 0 };
>diff --git a/Source/WebCore/svg/SVGGradientElement.cpp b/Source/WebCore/svg/SVGGradientElement.cpp
>index 80374dda16bf4e5e6b9627c2d2cd5c563635874f..bf3d886d188140df3d1f29ea188ca922fe27bc01 100644
>--- a/Source/WebCore/svg/SVGGradientElement.cpp
>+++ b/Source/WebCore/svg/SVGGradientElement.cpp
>@@ -51,7 +51,7 @@ SVGGradientElement::SVGGradientElement(const QualifiedName& tagName, Document& d
> });
> }
> 
>-void SVGGradientElement::parseAttribute(const QualifiedName& name, const AtomicString& value)
>+void SVGGradientElement::parseAttribute(const QualifiedName& name, const AtomString& value)
> {
> if (name == SVGNames::gradientUnitsAttr) {
> auto propertyValue = SVGPropertyTraits<SVGUnitTypes::SVGUnitType>::fromString(value);
>diff --git a/Source/WebCore/svg/SVGGradientElement.h b/Source/WebCore/svg/SVGGradientElement.h
>index 21b210c5951dcb1cec5c642ea89ec3622481f7af..6fcf45268fab6710e6512ceeb3d24920a5ea7323 100644
>--- a/Source/WebCore/svg/SVGGradientElement.h
>+++ b/Source/WebCore/svg/SVGGradientElement.h
>@@ -95,7 +95,7 @@ public:
> protected:
> SVGGradientElement(const QualifiedName&, Document&);
> 
>- void parseAttribute(const QualifiedName&, const AtomicString&) override;
>+ void parseAttribute(const QualifiedName&, const AtomString&) override;
> void svgAttributeChanged(const QualifiedName&) override;
> 
> private:
>diff --git a/Source/WebCore/svg/SVGGraphicsElement.cpp b/Source/WebCore/svg/SVGGraphicsElement.cpp
>index f72e14b1402e52d794244b7b46bdc52e49a57e2c..a75890f3180468d1524bee854359d0356eb5222d 100644
>--- a/Source/WebCore/svg/SVGGraphicsElement.cpp
>+++ b/Source/WebCore/svg/SVGGraphicsElement.cpp
>@@ -123,7 +123,7 @@ AffineTransform* SVGGraphicsElement::supplementalTransform()
> return m_supplementalTransform.get();
> }
> 
>-void SVGGraphicsElement::parseAttribute(const QualifiedName& name, const AtomicString& value)
>+void SVGGraphicsElement::parseAttribute(const QualifiedName& name, const AtomString& value)
> {
> if (name == SVGNames::transformAttr) {
> m_transform->baseVal()->parse(value);
>diff --git a/Source/WebCore/svg/SVGGraphicsElement.h b/Source/WebCore/svg/SVGGraphicsElement.h
>index d516e59b385906b287982cb90fd8f760ffa7754a..a4755ad30fa37bb99c48baa019c3c054046b664e 100644
>--- a/Source/WebCore/svg/SVGGraphicsElement.h
>+++ b/Source/WebCore/svg/SVGGraphicsElement.h
>@@ -72,7 +72,7 @@ protected:
> 
> bool supportsFocus() const override { return Element::supportsFocus() || hasFocusEventListeners(); }
> 
>- void parseAttribute(const QualifiedName&, const AtomicString&) override;
>+ void parseAttribute(const QualifiedName&, const AtomString&) override;
> void svgAttributeChanged(const QualifiedName&) override;
> 
> private:
>diff --git a/Source/WebCore/svg/SVGImageElement.cpp b/Source/WebCore/svg/SVGImageElement.cpp
>index caa65628c0ac079175596d13eb667ff6fbe3c730..9670e2644067cfdab347303519b14f0fc18f16b7 100644
>--- a/Source/WebCore/svg/SVGImageElement.cpp
>+++ b/Source/WebCore/svg/SVGImageElement.cpp
>@@ -67,7 +67,7 @@ bool SVGImageElement::hasSingleSecurityOrigin() const
> return !image || image->hasSingleSecurityOrigin();
> }
> 
>-void SVGImageElement::parseAttribute(const QualifiedName& name, const AtomicString& value)
>+void SVGImageElement::parseAttribute(const QualifiedName& name, const AtomString& value)
> {
> if (name == SVGNames::preserveAspectRatioAttr) {
> SVGPreserveAspectRatioValue preserveAspectRatio;
>@@ -160,7 +160,7 @@ Node::InsertedIntoAncestorResult SVGImageElement::insertedIntoAncestor(Insertion
> return InsertedIntoAncestorResult::Done;
> }
> 
>-const AtomicString& SVGImageElement::imageSourceURL() const
>+const AtomString& SVGImageElement::imageSourceURL() const
> {
> return getAttribute(SVGNames::hrefAttr, XLinkNames::hrefAttr);
> }
>diff --git a/Source/WebCore/svg/SVGImageElement.h b/Source/WebCore/svg/SVGImageElement.h
>index dcd7a0826ad49a2efd6d108bb11a289e963954d4..9fb5786875fb114c5232865e4e083aeb3fca8403 100644
>--- a/Source/WebCore/svg/SVGImageElement.h
>+++ b/Source/WebCore/svg/SVGImageElement.h
>@@ -34,7 +34,7 @@ public:
> static Ref<SVGImageElement> create(const QualifiedName&, Document&);
> 
> bool hasSingleSecurityOrigin() const;
>- const AtomicString& imageSourceURL() const final;
>+ const AtomString& imageSourceURL() const final;
> 
> const SVGLengthValue& x() const { return m_x->currentValue(); }
> const SVGLengthValue& y() const { return m_y->currentValue(); }
>@@ -54,7 +54,7 @@ private:
> using PropertyRegistry = SVGPropertyOwnerRegistry<SVGImageElement, SVGGraphicsElement, SVGExternalResourcesRequired, SVGURIReference>;
> const SVGPropertyRegistry& propertyRegistry() const final { return m_propertyRegistry; }
> 
>- void parseAttribute(const QualifiedName&, const AtomicString&) final;
>+ void parseAttribute(const QualifiedName&, const AtomString&) final;
> void svgAttributeChanged(const QualifiedName&) final;
> 
> void didAttachRenderers() final;
>diff --git a/Source/WebCore/svg/SVGImageLoader.cpp b/Source/WebCore/svg/SVGImageLoader.cpp
>index 7221dfcb7ddde59039276addc9f39bda2d789045..42a35d45892a80f80bcbad157d6dfeefe0deba62 100644
>--- a/Source/WebCore/svg/SVGImageLoader.cpp
>+++ b/Source/WebCore/svg/SVGImageLoader.cpp
>@@ -46,7 +46,7 @@ void SVGImageLoader::dispatchLoadEvent()
> }
> }
> 
>-String SVGImageLoader::sourceURI(const AtomicString& attribute) const
>+String SVGImageLoader::sourceURI(const AtomString& attribute) const
> {
> URL base = element().baseURI();
> if (base != WTF::blankURL())
>diff --git a/Source/WebCore/svg/SVGImageLoader.h b/Source/WebCore/svg/SVGImageLoader.h
>index 94fabf20e8366e9bed08806769454334f1fc6e5c..048ea2214555ef04dd10be5183b9ec813c2d2409 100644
>--- a/Source/WebCore/svg/SVGImageLoader.h
>+++ b/Source/WebCore/svg/SVGImageLoader.h
>@@ -32,7 +32,7 @@ public:
> 
> private:
> void dispatchLoadEvent() override;
>- String sourceURI(const AtomicString&) const override;
>+ String sourceURI(const AtomString&) const override;
> };
> 
> } // namespace WebCore
>diff --git a/Source/WebCore/svg/SVGLangSpace.cpp b/Source/WebCore/svg/SVGLangSpace.cpp
>index 926175a2345f541f401ac14c15980d599eb0bd04..c468cb547700c45c36e1cb3295bbc985347e5dda 100644
>--- a/Source/WebCore/svg/SVGLangSpace.cpp
>+++ b/Source/WebCore/svg/SVGLangSpace.cpp
>@@ -35,10 +35,10 @@ SVGLangSpace::SVGLangSpace(SVGElement* contextElement)
> {
> }
> 
>-const AtomicString& SVGLangSpace::xmlspace() const
>+const AtomString& SVGLangSpace::xmlspace() const
> {
> if (!m_space) {
>- static NeverDestroyed<const AtomicString> defaultString("default", AtomicString::ConstructFromLiteral);
>+ static NeverDestroyed<const AtomString> defaultString("default", AtomString::ConstructFromLiteral);
> return defaultString;
> }
> return m_space;
>@@ -49,7 +49,7 @@ bool SVGLangSpace::isKnownAttribute(const QualifiedName& attributeName)
> return attributeName.matches(XMLNames::langAttr) || attributeName.matches(XMLNames::spaceAttr);
> }
> 
>-void SVGLangSpace::parseAttribute(const QualifiedName& name, const AtomicString& value)
>+void SVGLangSpace::parseAttribute(const QualifiedName& name, const AtomString& value)
> {
> if (name.matches(XMLNames::langAttr))
> setXmllang(value);
>diff --git a/Source/WebCore/svg/SVGLangSpace.h b/Source/WebCore/svg/SVGLangSpace.h
>index 4eff7fb344d5175815a3e1d3b2e20891da4f6c03..fcdee7e387d8f89cb1262806e4154eb22674688f 100644
>--- a/Source/WebCore/svg/SVGLangSpace.h
>+++ b/Source/WebCore/svg/SVGLangSpace.h
>@@ -30,13 +30,13 @@ class SVGElement;
> 
> class SVGLangSpace {
> public:
>- const AtomicString& xmllang() const { return m_lang; }
>- void setXmllang(const AtomicString& xmlLang) { m_lang = xmlLang; }
>+ const AtomString& xmllang() const { return m_lang; }
>+ void setXmllang(const AtomString& xmlLang) { m_lang = xmlLang; }
> 
>- const AtomicString& xmlspace() const;
>- void setXmlspace(const AtomicString& xmlSpace) { m_space = xmlSpace; }
>+ const AtomString& xmlspace() const;
>+ void setXmlspace(const AtomString& xmlSpace) { m_space = xmlSpace; }
> 
>- void parseAttribute(const QualifiedName&, const AtomicString&);
>+ void parseAttribute(const QualifiedName&, const AtomString&);
> 
> void svgAttributeChanged(const QualifiedName&);
> 
>@@ -47,8 +47,8 @@ protected:
> 
> private:
> SVGElement& m_contextElement;
>- AtomicString m_lang;
>- AtomicString m_space;
>+ AtomString m_lang;
>+ AtomString m_space;
> };
> 
> } // namespace WebCore
>diff --git a/Source/WebCore/svg/SVGLineElement.cpp b/Source/WebCore/svg/SVGLineElement.cpp
>index 897344cc9c953cbb823485e0a0cfc59bfa6c7891..65fe54fa80461a979df661dad1f911da6119e9fa 100644
>--- a/Source/WebCore/svg/SVGLineElement.cpp
>+++ b/Source/WebCore/svg/SVGLineElement.cpp
>@@ -50,7 +50,7 @@ Ref<SVGLineElement> SVGLineElement::create(const QualifiedName& tagName, Documen
> return adoptRef(*new SVGLineElement(tagName, document));
> }
> 
>-void SVGLineElement::parseAttribute(const QualifiedName& name, const AtomicString& value)
>+void SVGLineElement::parseAttribute(const QualifiedName& name, const AtomString& value)
> {
> SVGParsingError parseError = NoError;
> 
>diff --git a/Source/WebCore/svg/SVGLineElement.h b/Source/WebCore/svg/SVGLineElement.h
>index dd029a3d5bed8250248799c94ccc6c781d27a2cf..582777a7adf7c39b21b6b708e0edefa4d8bbc039 100644
>--- a/Source/WebCore/svg/SVGLineElement.h
>+++ b/Source/WebCore/svg/SVGLineElement.h
>@@ -48,7 +48,7 @@ private:
> using PropertyRegistry = SVGPropertyOwnerRegistry<SVGLineElement, SVGGeometryElement, SVGExternalResourcesRequired>;
> const SVGPropertyRegistry& propertyRegistry() const final { return m_propertyRegistry; }
> 
>- void parseAttribute(const QualifiedName&, const AtomicString&) final;
>+ void parseAttribute(const QualifiedName&, const AtomString&) final;
> void svgAttributeChanged(const QualifiedName&) final;
> 
> bool isValid() const final { return SVGTests::isValid(); }
>diff --git a/Source/WebCore/svg/SVGLinearGradientElement.cpp b/Source/WebCore/svg/SVGLinearGradientElement.cpp
>index 0c98082c46782ce35e79e42771534e87c822b7ee..7d7d7c2364f2e4cf5e824dbf00dc8d44a2837610 100644
>--- a/Source/WebCore/svg/SVGLinearGradientElement.cpp
>+++ b/Source/WebCore/svg/SVGLinearGradientElement.cpp
>@@ -59,7 +59,7 @@ Ref<SVGLinearGradientElement> SVGLinearGradientElement::create(const QualifiedNa
> return adoptRef(*new SVGLinearGradientElement(tagName, document));
> }
> 
>-void SVGLinearGradientElement::parseAttribute(const QualifiedName& name, const AtomicString& value)
>+void SVGLinearGradientElement::parseAttribute(const QualifiedName& name, const AtomString& value)
> {
> SVGParsingError parseError = NoError;
> 
>diff --git a/Source/WebCore/svg/SVGLinearGradientElement.h b/Source/WebCore/svg/SVGLinearGradientElement.h
>index 04a31dd47c0b219163838af5c5e09a9285c3a26f..b0e6eb50d4ea6880f6c91b0abc51d3651a49b222 100644
>--- a/Source/WebCore/svg/SVGLinearGradientElement.h
>+++ b/Source/WebCore/svg/SVGLinearGradientElement.h
>@@ -51,7 +51,7 @@ private:
> using PropertyRegistry = SVGPropertyOwnerRegistry<SVGLinearGradientElement, SVGGradientElement>;
> const SVGPropertyRegistry& propertyRegistry() const final { return m_propertyRegistry; }
> 
>- void parseAttribute(const QualifiedName&, const AtomicString&) override;
>+ void parseAttribute(const QualifiedName&, const AtomString&) override;
> void svgAttributeChanged(const QualifiedName&) override;
> 
> RenderPtr<RenderElement> createElementRenderer(RenderStyle&&, const RenderTreePosition&) override;
>diff --git a/Source/WebCore/svg/SVGMPathElement.cpp b/Source/WebCore/svg/SVGMPathElement.cpp
>index 53765d993dc305e2ab5a765c4cd1dcca6216a5fb..d8039242c6520373d432f0d30da8b4b8cbededdf 100644
>--- a/Source/WebCore/svg/SVGMPathElement.cpp
>+++ b/Source/WebCore/svg/SVGMPathElement.cpp
>@@ -101,7 +101,7 @@ void SVGMPathElement::removedFromAncestor(RemovalType removalType, ContainerNode
> clearResourceReferences();
> }
> 
>-void SVGMPathElement::parseAttribute(const QualifiedName& name, const AtomicString& value)
>+void SVGMPathElement::parseAttribute(const QualifiedName& name, const AtomString& value)
> {
> SVGElement::parseAttribute(name, value);
> SVGURIReference::parseAttribute(name, value);
>diff --git a/Source/WebCore/svg/SVGMPathElement.h b/Source/WebCore/svg/SVGMPathElement.h
>index d65903ceb83a9bcf6154b78ccaa4a6ba354b3fe6..67d1db3548325b169ff25622841131881745b3df 100644
>--- a/Source/WebCore/svg/SVGMPathElement.h
>+++ b/Source/WebCore/svg/SVGMPathElement.h
>@@ -46,7 +46,7 @@ private:
> using PropertyRegistry = SVGPropertyOwnerRegistry<SVGMPathElement, SVGElement, SVGExternalResourcesRequired, SVGURIReference>;
> const SVGPropertyRegistry& propertyRegistry() const final { return m_propertyRegistry; }
> 
>- void parseAttribute(const QualifiedName&, const AtomicString&) final;
>+ void parseAttribute(const QualifiedName&, const AtomString&) final;
> void svgAttributeChanged(const QualifiedName&) final;
> 
> void buildPendingResource() final;
>diff --git a/Source/WebCore/svg/SVGMarkerElement.cpp b/Source/WebCore/svg/SVGMarkerElement.cpp
>index b3c467206ef7d16e6d4c41ef57c2ea778e221e9a..f5346240f0161557b2b9e3f6494aa6f2e15dcd89 100644
>--- a/Source/WebCore/svg/SVGMarkerElement.cpp
>+++ b/Source/WebCore/svg/SVGMarkerElement.cpp
>@@ -60,7 +60,7 @@ AffineTransform SVGMarkerElement::viewBoxToViewTransform(float viewWidth, float
> return SVGFitToViewBox::viewBoxToViewTransform(viewBox(), preserveAspectRatio(), viewWidth, viewHeight);
> }
> 
>-void SVGMarkerElement::parseAttribute(const QualifiedName& name, const AtomicString& value)
>+void SVGMarkerElement::parseAttribute(const QualifiedName& name, const AtomString& value)
> {
> if (name == SVGNames::markerUnitsAttr) {
> auto propertyValue = SVGPropertyTraits<SVGMarkerUnitsType>::fromString(value);
>diff --git a/Source/WebCore/svg/SVGMarkerElement.h b/Source/WebCore/svg/SVGMarkerElement.h
>index f034584403baba263f18bec1c1438c76e8681b50..1c86e75978efe6000a175a04a188f0a12afbf624 100644
>--- a/Source/WebCore/svg/SVGMarkerElement.h
>+++ b/Source/WebCore/svg/SVGMarkerElement.h
>@@ -74,7 +74,7 @@ private:
> using PropertyRegistry = SVGPropertyOwnerRegistry<SVGMarkerElement, SVGElement, SVGExternalResourcesRequired, SVGFitToViewBox>;
> const SVGPropertyRegistry& propertyRegistry() const final { return m_propertyRegistry; }
> 
>- void parseAttribute(const QualifiedName&, const AtomicString&) override;
>+ void parseAttribute(const QualifiedName&, const AtomString&) override;
> void svgAttributeChanged(const QualifiedName&) override;
> void childrenChanged(const ChildChange&) override;
> 
>diff --git a/Source/WebCore/svg/SVGMaskElement.cpp b/Source/WebCore/svg/SVGMaskElement.cpp
>index 56e0cd1b096ebb0ad9f195bd518b02b4f7f21fdf..8f2a802aee0fbf4874e44684e2a846abf0fc867c 100644
>--- a/Source/WebCore/svg/SVGMaskElement.cpp
>+++ b/Source/WebCore/svg/SVGMaskElement.cpp
>@@ -64,7 +64,7 @@ Ref<SVGMaskElement> SVGMaskElement::create(const QualifiedName& tagName, Documen
> return adoptRef(*new SVGMaskElement(tagName, document));
> }
> 
>-void SVGMaskElement::parseAttribute(const QualifiedName& name, const AtomicString& value)
>+void SVGMaskElement::parseAttribute(const QualifiedName& name, const AtomString& value)
> {
> if (name == SVGNames::maskUnitsAttr) {
> auto propertyValue = SVGPropertyTraits<SVGUnitTypes::SVGUnitType>::fromString(value);
>diff --git a/Source/WebCore/svg/SVGMaskElement.h b/Source/WebCore/svg/SVGMaskElement.h
>index c5e358dffba9de4d703f6c48207cdf1a36a4c0be..9564649bc83c3412c4064d0303d82d584b23796f 100644
>--- a/Source/WebCore/svg/SVGMaskElement.h
>+++ b/Source/WebCore/svg/SVGMaskElement.h
>@@ -53,7 +53,7 @@ private:
> using PropertyRegistry = SVGPropertyOwnerRegistry<SVGMaskElement, SVGElement, SVGExternalResourcesRequired, SVGTests>;
> const SVGPropertyRegistry& propertyRegistry() const final { return m_propertyRegistry; }
> 
>- void parseAttribute(const QualifiedName&, const AtomicString&) final;
>+ void parseAttribute(const QualifiedName&, const AtomString&) final;
> void svgAttributeChanged(const QualifiedName&) final;
> void childrenChanged(const ChildChange&) final;
> 
>diff --git a/Source/WebCore/svg/SVGPathElement.cpp b/Source/WebCore/svg/SVGPathElement.cpp
>index 07fc2a9a33f41875354ec9816776446913a253a8..6ba1440d75218dfe49daec4b5eda7841105e1aa8 100644
>--- a/Source/WebCore/svg/SVGPathElement.cpp
>+++ b/Source/WebCore/svg/SVGPathElement.cpp
>@@ -52,7 +52,7 @@ Ref<SVGPathElement> SVGPathElement::create(const QualifiedName& tagName, Documen
> return adoptRef(*new SVGPathElement(tagName, document));
> }
> 
>-void SVGPathElement::parseAttribute(const QualifiedName& name, const AtomicString& value)
>+void SVGPathElement::parseAttribute(const QualifiedName& name, const AtomString& value)
> {
> if (name == SVGNames::dAttr) {
> if (!m_pathSegList->baseVal()->parse(value))
>diff --git a/Source/WebCore/svg/SVGPathElement.h b/Source/WebCore/svg/SVGPathElement.h
>index 6774d0698aa42fb53737de1d895070831358e7a7..3a59773a03d30e777eb33b50c39d109ff5b85ac8 100644
>--- a/Source/WebCore/svg/SVGPathElement.h
>+++ b/Source/WebCore/svg/SVGPathElement.h
>@@ -111,7 +111,7 @@ private:
> using PropertyRegistry = SVGPropertyOwnerRegistry<SVGPathElement, SVGGeometryElement, SVGExternalResourcesRequired>;
> const SVGPropertyRegistry& propertyRegistry() const final { return m_propertyRegistry; }
> 
>- void parseAttribute(const QualifiedName&, const AtomicString&) final;
>+ void parseAttribute(const QualifiedName&, const AtomString&) final;
> void svgAttributeChanged(const QualifiedName&) final;
> 
> bool isValid() const final { return SVGTests::isValid(); }
>diff --git a/Source/WebCore/svg/SVGPatternElement.cpp b/Source/WebCore/svg/SVGPatternElement.cpp
>index f9e820797e98230c4dd0eb91e6d7d5d162f4a8c4..cddc3a3e8b1383f060f491fde636bc91ef649e87 100644
>--- a/Source/WebCore/svg/SVGPatternElement.cpp
>+++ b/Source/WebCore/svg/SVGPatternElement.cpp
>@@ -71,7 +71,7 @@ Ref<SVGPatternElement> SVGPatternElement::create(const QualifiedName& tagName, D
> return adoptRef(*new SVGPatternElement(tagName, document));
> }
> 
>-void SVGPatternElement::parseAttribute(const QualifiedName& name, const AtomicString& value)
>+void SVGPatternElement::parseAttribute(const QualifiedName& name, const AtomString& value)
> {
> if (name == SVGNames::patternUnitsAttr) {
> auto propertyValue = SVGPropertyTraits<SVGUnitTypes::SVGUnitType>::fromString(value);
>diff --git a/Source/WebCore/svg/SVGPatternElement.h b/Source/WebCore/svg/SVGPatternElement.h
>index 36cdefb0b7634db27ddded816608c9c176c1be0f..d1ad59c8de4beb98a003e9b1afdf4631a8a1adfc 100644
>--- a/Source/WebCore/svg/SVGPatternElement.h
>+++ b/Source/WebCore/svg/SVGPatternElement.h
>@@ -64,7 +64,7 @@ private:
> using PropertyRegistry = SVGPropertyOwnerRegistry<SVGPatternElement, SVGElement, SVGExternalResourcesRequired, SVGFitToViewBox, SVGTests, SVGURIReference>;
> const SVGPropertyRegistry& propertyRegistry() const final { return m_propertyRegistry; }
> 
>- void parseAttribute(const QualifiedName&, const AtomicString&) final;
>+ void parseAttribute(const QualifiedName&, const AtomString&) final;
> void svgAttributeChanged(const QualifiedName&) final;
> void childrenChanged(const ChildChange&) final;
> 
>diff --git a/Source/WebCore/svg/SVGPolyElement.cpp b/Source/WebCore/svg/SVGPolyElement.cpp
>index c2fe2eaa897d78b69b095c6dcf350c29f0fcbbb6..62bf31406270fc10a0abe9e944f6fcad2f73b882 100644
>--- a/Source/WebCore/svg/SVGPolyElement.cpp
>+++ b/Source/WebCore/svg/SVGPolyElement.cpp
>@@ -43,7 +43,7 @@ SVGPolyElement::SVGPolyElement(const QualifiedName& tagName, Document& document)
> });
> }
> 
>-void SVGPolyElement::parseAttribute(const QualifiedName& name, const AtomicString& value)
>+void SVGPolyElement::parseAttribute(const QualifiedName& name, const AtomString& value)
> {
> if (name == SVGNames::pointsAttr) {
> if (!m_points->baseVal()->parse(value))
>diff --git a/Source/WebCore/svg/SVGPolyElement.h b/Source/WebCore/svg/SVGPolyElement.h
>index 67224903ef6310e2bd2b17912189634459d25f2b..5ee311f354c27afe17338146e12f91db70526b68 100644
>--- a/Source/WebCore/svg/SVGPolyElement.h
>+++ b/Source/WebCore/svg/SVGPolyElement.h
>@@ -44,7 +44,7 @@ private:
> using PropertyRegistry = SVGPropertyOwnerRegistry<SVGPolyElement, SVGGeometryElement, SVGExternalResourcesRequired>;
> const SVGPropertyRegistry& propertyRegistry() const final { return m_propertyRegistry; }
> 
>- void parseAttribute(const QualifiedName&, const AtomicString&) override; 
>+ void parseAttribute(const QualifiedName&, const AtomString&) override; 
> void svgAttributeChanged(const QualifiedName&) override;
> 
> bool isValid() const override { return SVGTests::isValid(); }
>diff --git a/Source/WebCore/svg/SVGRadialGradientElement.cpp b/Source/WebCore/svg/SVGRadialGradientElement.cpp
>index 9aa23ae0bd6b90d986d31dcec6344f557d1c8965..b11d875482654aa7568948949356f1496aec04c5 100644
>--- a/Source/WebCore/svg/SVGRadialGradientElement.cpp
>+++ b/Source/WebCore/svg/SVGRadialGradientElement.cpp
>@@ -61,7 +61,7 @@ Ref<SVGRadialGradientElement> SVGRadialGradientElement::create(const QualifiedNa
> return adoptRef(*new SVGRadialGradientElement(tagName, document));
> }
> 
>-void SVGRadialGradientElement::parseAttribute(const QualifiedName& name, const AtomicString& value)
>+void SVGRadialGradientElement::parseAttribute(const QualifiedName& name, const AtomString& value)
> {
> SVGParsingError parseError = NoError;
> 
>diff --git a/Source/WebCore/svg/SVGRadialGradientElement.h b/Source/WebCore/svg/SVGRadialGradientElement.h
>index b88a35a4328af8c6640f22eda614f91ebfe6a597..f315d94808c5dd8cbf4192aba1fd074e465fa039 100644
>--- a/Source/WebCore/svg/SVGRadialGradientElement.h
>+++ b/Source/WebCore/svg/SVGRadialGradientElement.h
>@@ -55,7 +55,7 @@ private:
> using PropertyRegistry = SVGPropertyOwnerRegistry<SVGRadialGradientElement, SVGGradientElement>;
> const SVGPropertyRegistry& propertyRegistry() const final { return m_propertyRegistry; }
> 
>- void parseAttribute(const QualifiedName&, const AtomicString&) override;
>+ void parseAttribute(const QualifiedName&, const AtomString&) override;
> void svgAttributeChanged(const QualifiedName&) override;
> 
> RenderPtr<RenderElement> createElementRenderer(RenderStyle&&, const RenderTreePosition&) override;
>diff --git a/Source/WebCore/svg/SVGRectElement.cpp b/Source/WebCore/svg/SVGRectElement.cpp
>index 4e14cc6d7988f5b862ba5fa81223eacbc8a0da06..eb539980b5e9116b1f28b260f308f015ea890617 100644
>--- a/Source/WebCore/svg/SVGRectElement.cpp
>+++ b/Source/WebCore/svg/SVGRectElement.cpp
>@@ -53,7 +53,7 @@ Ref<SVGRectElement> SVGRectElement::create(const QualifiedName& tagName, Documen
> return adoptRef(*new SVGRectElement(tagName, document));
> }
> 
>-void SVGRectElement::parseAttribute(const QualifiedName& name, const AtomicString& value)
>+void SVGRectElement::parseAttribute(const QualifiedName& name, const AtomString& value)
> {
> SVGParsingError parseError = NoError;
> 
>diff --git a/Source/WebCore/svg/SVGRectElement.h b/Source/WebCore/svg/SVGRectElement.h
>index c392e1e2e5c6e497dd7c89f2b3709cbf75776056..fc2479286ee7ba45bc7668bede83b75f4679ca4e 100644
>--- a/Source/WebCore/svg/SVGRectElement.h
>+++ b/Source/WebCore/svg/SVGRectElement.h
>@@ -52,7 +52,7 @@ private:
> using PropertyRegistry = SVGPropertyOwnerRegistry<SVGRectElement, SVGGeometryElement, SVGExternalResourcesRequired>;
> const SVGPropertyRegistry& propertyRegistry() const final { return m_propertyRegistry; }
> 
>- void parseAttribute(const QualifiedName&, const AtomicString&) final;
>+ void parseAttribute(const QualifiedName&, const AtomString&) final;
> void svgAttributeChanged(const QualifiedName&) final;
> 
> bool isValid() const final { return SVGTests::isValid(); }
>diff --git a/Source/WebCore/svg/SVGSVGElement.cpp b/Source/WebCore/svg/SVGSVGElement.cpp
>index 9bf0342332aeb44dcdb49ba9432b11cbce026baa..c57cffc591aa87d04a86d590e3e6570420deb92c 100644
>--- a/Source/WebCore/svg/SVGSVGElement.cpp
>+++ b/Source/WebCore/svg/SVGSVGElement.cpp
>@@ -94,26 +94,26 @@ void SVGSVGElement::didMoveToNewDocument(Document& oldDocument, Document& newDoc
> SVGGraphicsElement::didMoveToNewDocument(oldDocument, newDocument);
> }
> 
>-const AtomicString& SVGSVGElement::contentScriptType() const
>+const AtomString& SVGSVGElement::contentScriptType() const
> {
>- static NeverDestroyed<AtomicString> defaultScriptType { "text/ecmascript" };
>- const AtomicString& type = attributeWithoutSynchronization(SVGNames::contentScriptTypeAttr);
>+ static NeverDestroyed<AtomString> defaultScriptType { "text/ecmascript" };
>+ const AtomString& type = attributeWithoutSynchronization(SVGNames::contentScriptTypeAttr);
> return type.isNull() ? defaultScriptType.get() : type;
> }
> 
>-void SVGSVGElement::setContentScriptType(const AtomicString& type)
>+void SVGSVGElement::setContentScriptType(const AtomString& type)
> {
> setAttributeWithoutSynchronization(SVGNames::contentScriptTypeAttr, type);
> }
> 
>-const AtomicString& SVGSVGElement::contentStyleType() const
>+const AtomString& SVGSVGElement::contentStyleType() const
> {
>- static NeverDestroyed<AtomicString> defaultStyleType { "text/css" };
>- const AtomicString& type = attributeWithoutSynchronization(SVGNames::contentStyleTypeAttr);
>+ static NeverDestroyed<AtomString> defaultStyleType { "text/css" };
>+ const AtomString& type = attributeWithoutSynchronization(SVGNames::contentStyleTypeAttr);
> return type.isNull() ? defaultStyleType.get() : type;
> }
> 
>-void SVGSVGElement::setContentStyleType(const AtomicString& type)
>+void SVGSVGElement::setContentStyleType(const AtomString& type)
> {
> setAttributeWithoutSynchronization(SVGNames::contentStyleTypeAttr, type);
> }
>@@ -193,7 +193,7 @@ void SVGSVGElement::updateCurrentTranslate()
> document().renderView()->repaint();
> }
> 
>-void SVGSVGElement::parseAttribute(const QualifiedName& name, const AtomicString& value)
>+void SVGSVGElement::parseAttribute(const QualifiedName& name, const AtomString& value)
> {
> if (!nearestViewportElement()) {
> // For these events, the outermost <svg> element works like a <body> element does,
>@@ -735,7 +735,7 @@ void SVGSVGElement::resumeFromDocumentSuspension()
> 
> // getElementById on SVGSVGElement is restricted to only the child subtree defined by the <svg> element.
> // See http://www.w3.org/TR/SVG11/struct.html#InterfaceSVGSVGElement
>-Element* SVGSVGElement::getElementById(const AtomicString& id)
>+Element* SVGSVGElement::getElementById(const AtomString& id)
> {
> if (id.isNull())
> return nullptr;
>diff --git a/Source/WebCore/svg/SVGSVGElement.h b/Source/WebCore/svg/SVGSVGElement.h
>index 960f85ada0afee58accb00c41e0b44fe7b6798e1..9eacd8091dc11961a9690199763fc2025d2578c0 100644
>--- a/Source/WebCore/svg/SVGSVGElement.h
>+++ b/Source/WebCore/svg/SVGSVGElement.h
>@@ -41,11 +41,11 @@ class SVGViewSpec;
> class SVGSVGElement final : public SVGGraphicsElement, public SVGExternalResourcesRequired, public SVGFitToViewBox, public SVGZoomAndPan {
> WTF_MAKE_ISO_ALLOCATED(SVGSVGElement);
> public: // DOM
>- const AtomicString& contentScriptType() const;
>- void setContentScriptType(const AtomicString&);
>+ const AtomString& contentScriptType() const;
>+ void setContentScriptType(const AtomString&);
> 
>- const AtomicString& contentStyleType() const;
>- void setContentStyleType(const AtomicString&);
>+ const AtomString& contentStyleType() const;
>+ void setContentStyleType(const AtomString&);
> 
> Ref<SVGRect> viewport() const;
> 
>@@ -91,7 +91,7 @@ public: // DOM
> static Ref<SVGTransform> createSVGTransform();
> static Ref<SVGTransform> createSVGTransformFromMatrix(SVGMatrix&);
> 
>- Element* getElementById(const AtomicString&);
>+ Element* getElementById(const AtomString&);
> 
> public:
> static Ref<SVGSVGElement> create(const QualifiedName&, Document&);
>@@ -134,7 +134,7 @@ private:
> using PropertyRegistry = SVGPropertyOwnerRegistry<SVGSVGElement, SVGGraphicsElement, SVGExternalResourcesRequired, SVGFitToViewBox>;
> const SVGPropertyRegistry& propertyRegistry() const final { return m_propertyRegistry; }
> 
>- void parseAttribute(const QualifiedName&, const AtomicString&) override;
>+ void parseAttribute(const QualifiedName&, const AtomString&) override;
> void svgAttributeChanged(const QualifiedName&) override;
> bool selfHasRelativeLengths() const override;
> bool isValid() const override;
>diff --git a/Source/WebCore/svg/SVGSVGElement.idl b/Source/WebCore/svg/SVGSVGElement.idl
>index 3deb05ea18469a362247cba618cc85812fda8f62..44aa5196c6ec6279b01f545c7f557b3746348f10 100644
>--- a/Source/WebCore/svg/SVGSVGElement.idl
>+++ b/Source/WebCore/svg/SVGSVGElement.idl
>@@ -74,7 +74,7 @@
> [NewObject] SVGTransform createSVGTransform();
> [NewObject] SVGTransform createSVGTransformFromMatrix(SVGMatrix matrix);
> 
>- Element getElementById([RequiresExistingAtomicString] DOMString elementId);
>+ Element getElementById([RequiresExistingAtomString] DOMString elementId);
> };
> 
> SVGSVGElement implements SVGExternalResourcesRequired;
>diff --git a/Source/WebCore/svg/SVGScriptElement.cpp b/Source/WebCore/svg/SVGScriptElement.cpp
>index 1e09454247ea1aa5e88fc75f790523b906fb3945..6f3a29b96e1906dd7336b64307d5dc4237b8740a 100644
>--- a/Source/WebCore/svg/SVGScriptElement.cpp
>+++ b/Source/WebCore/svg/SVGScriptElement.cpp
>@@ -45,7 +45,7 @@ Ref<SVGScriptElement> SVGScriptElement::create(const QualifiedName& tagName, Doc
> return adoptRef(*new SVGScriptElement(tagName, document, insertedByParser, false));
> }
> 
>-void SVGScriptElement::parseAttribute(const QualifiedName& name, const AtomicString& value)
>+void SVGScriptElement::parseAttribute(const QualifiedName& name, const AtomString& value)
> {
> SVGElement::parseAttribute(name, value);
> SVGURIReference::parseAttribute(name, value);
>diff --git a/Source/WebCore/svg/SVGScriptElement.h b/Source/WebCore/svg/SVGScriptElement.h
>index f15f3b7cf6f93af148d5032a10dd2b0167afabaf..2bd57a42260f6664d30e79c7344bec6163edebdb 100644
>--- a/Source/WebCore/svg/SVGScriptElement.h
>+++ b/Source/WebCore/svg/SVGScriptElement.h
>@@ -43,7 +43,7 @@ private:
> using PropertyRegistry = SVGPropertyOwnerRegistry<SVGScriptElement, SVGElement, SVGExternalResourcesRequired, SVGURIReference>;
> const SVGPropertyRegistry& propertyRegistry() const final { return m_propertyRegistry; }
> 
>- void parseAttribute(const QualifiedName&, const AtomicString&) final;
>+ void parseAttribute(const QualifiedName&, const AtomString&) final;
> void svgAttributeChanged(const QualifiedName&) final;
> 
> InsertedIntoAncestorResult insertedIntoAncestor(InsertionType, ContainerNode&) final;
>diff --git a/Source/WebCore/svg/SVGStopElement.cpp b/Source/WebCore/svg/SVGStopElement.cpp
>index ba1dab0ff1d83679adb797df53608588ac1dd10b..e31923d9ba3981d33fc29c8874f36d7c9e160782 100644
>--- a/Source/WebCore/svg/SVGStopElement.cpp
>+++ b/Source/WebCore/svg/SVGStopElement.cpp
>@@ -49,7 +49,7 @@ Ref<SVGStopElement> SVGStopElement::create(const QualifiedName& tagName, Documen
> return adoptRef(*new SVGStopElement(tagName, document));
> }
> 
>-void SVGStopElement::parseAttribute(const QualifiedName& name, const AtomicString& value)
>+void SVGStopElement::parseAttribute(const QualifiedName& name, const AtomString& value)
> {
> if (name == SVGNames::offsetAttr) {
> if (value.endsWith('%'))
>diff --git a/Source/WebCore/svg/SVGStopElement.h b/Source/WebCore/svg/SVGStopElement.h
>index 8104fbbd7f6cfcdb73c60d3703d4ee668741a30a..e651c4a262f97834bc230687e62124352f08b150 100644
>--- a/Source/WebCore/svg/SVGStopElement.h
>+++ b/Source/WebCore/svg/SVGStopElement.h
>@@ -41,7 +41,7 @@ private:
> using PropertyRegistry = SVGPropertyOwnerRegistry<SVGStopElement, SVGElement>;
> const SVGPropertyRegistry& propertyRegistry() const final { return m_propertyRegistry; }
> 
>- void parseAttribute(const QualifiedName&, const AtomicString&) final;
>+ void parseAttribute(const QualifiedName&, const AtomString&) final;
> void svgAttributeChanged(const QualifiedName&) final;
> 
> bool isGradientStop() const final { return true; }
>diff --git a/Source/WebCore/svg/SVGStyleElement.cpp b/Source/WebCore/svg/SVGStyleElement.cpp
>index d0ca399651da6ba05b7d822cd46ee5aa4b14ea69..45de8790118a70c709558e265a3568da5ab9ecc2 100644
>--- a/Source/WebCore/svg/SVGStyleElement.cpp
>+++ b/Source/WebCore/svg/SVGStyleElement.cpp
>@@ -62,26 +62,26 @@ void SVGStyleElement::setDisabled(bool setDisabled)
> styleSheet->setDisabled(setDisabled);
> }
> 
>-const AtomicString& SVGStyleElement::type() const
>+const AtomString& SVGStyleElement::type() const
> {
>- static NeverDestroyed<const AtomicString> defaultValue("text/css", AtomicString::ConstructFromLiteral);
>- const AtomicString& n = getAttribute(SVGNames::typeAttr);
>+ static NeverDestroyed<const AtomString> defaultValue("text/css", AtomString::ConstructFromLiteral);
>+ const AtomString& n = getAttribute(SVGNames::typeAttr);
> return n.isNull() ? defaultValue.get() : n;
> }
> 
>-void SVGStyleElement::setType(const AtomicString& type)
>+void SVGStyleElement::setType(const AtomString& type)
> {
> setAttribute(SVGNames::typeAttr, type);
> }
> 
>-const AtomicString& SVGStyleElement::media() const
>+const AtomString& SVGStyleElement::media() const
> {
>- static NeverDestroyed<const AtomicString> defaultValue("all", AtomicString::ConstructFromLiteral);
>- const AtomicString& n = attributeWithoutSynchronization(SVGNames::mediaAttr);
>+ static NeverDestroyed<const AtomString> defaultValue("all", AtomString::ConstructFromLiteral);
>+ const AtomString& n = attributeWithoutSynchronization(SVGNames::mediaAttr);
> return n.isNull() ? defaultValue.get() : n;
> }
> 
>-void SVGStyleElement::setMedia(const AtomicString& media)
>+void SVGStyleElement::setMedia(const AtomString& media)
> {
> setAttributeWithoutSynchronization(SVGNames::mediaAttr, media);
> }
>@@ -91,7 +91,7 @@ String SVGStyleElement::title() const
> return attributeWithoutSynchronization(SVGNames::titleAttr);
> }
> 
>-void SVGStyleElement::parseAttribute(const QualifiedName& name, const AtomicString& value)
>+void SVGStyleElement::parseAttribute(const QualifiedName& name, const AtomString& value)
> {
> if (name == SVGNames::titleAttr) {
> if (sheet() && !isInShadowTree())
>diff --git a/Source/WebCore/svg/SVGStyleElement.h b/Source/WebCore/svg/SVGStyleElement.h
>index 41a937ed19e849e5403a4174f639034735fe3462..17039438705d8778881ad3f4702e45e6427498b7 100644
>--- a/Source/WebCore/svg/SVGStyleElement.h
>+++ b/Source/WebCore/svg/SVGStyleElement.h
>@@ -37,16 +37,16 @@ public:
> bool disabled() const;
> void setDisabled(bool);
> 
>- const AtomicString& type() const;
>- void setType(const AtomicString&);
>+ const AtomString& type() const;
>+ void setType(const AtomString&);
> 
>- const AtomicString& media() const;
>- void setMedia(const AtomicString&);
>+ const AtomString& media() const;
>+ void setMedia(const AtomString&);
> 
> private:
> SVGStyleElement(const QualifiedName&, Document&, bool createdByParser);
> 
>- void parseAttribute(const QualifiedName&, const AtomicString&) final;
>+ void parseAttribute(const QualifiedName&, const AtomString&) final;
> InsertedIntoAncestorResult insertedIntoAncestor(InsertionType, ContainerNode&) final;
> void removedFromAncestor(RemovalType, ContainerNode&) final;
> void childrenChanged(const ChildChange&) final;
>diff --git a/Source/WebCore/svg/SVGSymbolElement.cpp b/Source/WebCore/svg/SVGSymbolElement.cpp
>index 2e339a36b14fd7852390d71033f727b1b3b46d9c..c7cc412b80e8d18d89f34c16f416b09722d37c1a 100644
>--- a/Source/WebCore/svg/SVGSymbolElement.cpp
>+++ b/Source/WebCore/svg/SVGSymbolElement.cpp
>@@ -44,7 +44,7 @@ Ref<SVGSymbolElement> SVGSymbolElement::create(const QualifiedName& tagName, Doc
> return adoptRef(*new SVGSymbolElement(tagName, document));
> }
> 
>-void SVGSymbolElement::parseAttribute(const QualifiedName& name, const AtomicString& value)
>+void SVGSymbolElement::parseAttribute(const QualifiedName& name, const AtomString& value)
> {
> SVGElement::parseAttribute(name, value);
> SVGExternalResourcesRequired::parseAttribute(name, value);
>diff --git a/Source/WebCore/svg/SVGSymbolElement.h b/Source/WebCore/svg/SVGSymbolElement.h
>index 8c4afdedc9c2bb0ffa2ef0ecf3806d3c3f483b76..1f0e3e4d57a4d32711fcd6afef1eab6717e85b43 100644
>--- a/Source/WebCore/svg/SVGSymbolElement.h
>+++ b/Source/WebCore/svg/SVGSymbolElement.h
>@@ -38,7 +38,7 @@ private:
> using PropertyRegistry = SVGPropertyOwnerRegistry<SVGSymbolElement, SVGElement, SVGExternalResourcesRequired, SVGFitToViewBox>;
> const SVGPropertyRegistry& propertyRegistry() const final { return m_propertyRegistry; }
> 
>- void parseAttribute(const QualifiedName&, const AtomicString&) override;
>+ void parseAttribute(const QualifiedName&, const AtomString&) override;
> void svgAttributeChanged(const QualifiedName&) override;
> RenderPtr<RenderElement> createElementRenderer(RenderStyle&&, const RenderTreePosition&) override;
> 
>diff --git a/Source/WebCore/svg/SVGTRefElement.cpp b/Source/WebCore/svg/SVGTRefElement.cpp
>index 823f1f023532a06387ea61365d0797dd5b02c581..a86396b80a33ec0e66e0c0109d34d35239946df9 100644
>--- a/Source/WebCore/svg/SVGTRefElement.cpp
>+++ b/Source/WebCore/svg/SVGTRefElement.cpp
>@@ -172,7 +172,7 @@ void SVGTRefElement::detachTarget()
> document().accessSVGExtensions().addPendingResource(target.identifier, *this);
> }
> 
>-void SVGTRefElement::parseAttribute(const QualifiedName& name, const AtomicString& value)
>+void SVGTRefElement::parseAttribute(const QualifiedName& name, const AtomString& value)
> {
> SVGTextPositioningElement::parseAttribute(name, value);
> SVGURIReference::parseAttribute(name, value);
>diff --git a/Source/WebCore/svg/SVGTRefElement.h b/Source/WebCore/svg/SVGTRefElement.h
>index 8e816f5469bcec8b9f53080408ae6347a6c0613c..1bd13f8a8428128186534f9a84c8d412c995ff95 100644
>--- a/Source/WebCore/svg/SVGTRefElement.h
>+++ b/Source/WebCore/svg/SVGTRefElement.h
>@@ -42,7 +42,7 @@ private:
> using PropertyRegistry = SVGPropertyOwnerRegistry<SVGTRefElement, SVGTextPositioningElement, SVGURIReference>;
> const SVGPropertyRegistry& propertyRegistry() const final { return m_propertyRegistry; }
> 
>- void parseAttribute(const QualifiedName&, const AtomicString&) override;
>+ void parseAttribute(const QualifiedName&, const AtomString&) override;
> void svgAttributeChanged(const QualifiedName&) override;
> 
> RenderPtr<RenderElement> createElementRenderer(RenderStyle&&, const RenderTreePosition&) override;
>diff --git a/Source/WebCore/svg/SVGTests.cpp b/Source/WebCore/svg/SVGTests.cpp
>index 45523044f84066fe022c03d1595e8f32a9f7c0d5..1af5dab5f4499a8c67b596fbd75991cc1738fc6c 100644
>--- a/Source/WebCore/svg/SVGTests.cpp
>+++ b/Source/WebCore/svg/SVGTests.cpp
>@@ -147,7 +147,7 @@ bool SVGTests::isValid() const
> return true;
> }
> 
>-void SVGTests::parseAttribute(const QualifiedName& attributeName, const AtomicString& value)
>+void SVGTests::parseAttribute(const QualifiedName& attributeName, const AtomString& value)
> {
> if (attributeName == requiredFeaturesAttr)
> m_requiredFeatures->reset(value);
>diff --git a/Source/WebCore/svg/SVGTests.h b/Source/WebCore/svg/SVGTests.h
>index 449270d9f9d0f897ddff9e7c15cceb080647e174..a9c2ace0a30c450e9d9d28191152976c522a8c5b 100644
>--- a/Source/WebCore/svg/SVGTests.h
>+++ b/Source/WebCore/svg/SVGTests.h
>@@ -40,7 +40,7 @@ public:
> 
> using PropertyRegistry = SVGPropertyOwnerRegistry<SVGTests>;
> 
>- void parseAttribute(const QualifiedName&, const AtomicString&);
>+ void parseAttribute(const QualifiedName&, const AtomString&);
> void svgAttributeChanged(const QualifiedName&);
> 
> static void addSupportedAttributes(HashSet<QualifiedName>&);
>diff --git a/Source/WebCore/svg/SVGTextContentElement.cpp b/Source/WebCore/svg/SVGTextContentElement.cpp
>index 4e1316bdce3bc0ce42fa22204f3011b324e204e0..1820b3ccd2e526c921431f4e47f611c5923ff2a4 100644
>--- a/Source/WebCore/svg/SVGTextContentElement.cpp
>+++ b/Source/WebCore/svg/SVGTextContentElement.cpp
>@@ -148,7 +148,7 @@ bool SVGTextContentElement::isPresentationAttribute(const QualifiedName& name) c
> return SVGGraphicsElement::isPresentationAttribute(name);
> }
> 
>-void SVGTextContentElement::collectStyleForPresentationAttribute(const QualifiedName& name, const AtomicString& value, MutableStyleProperties& style)
>+void SVGTextContentElement::collectStyleForPresentationAttribute(const QualifiedName& name, const AtomString& value, MutableStyleProperties& style)
> {
> if (name.matches(XMLNames::spaceAttr)) {
> if (value == "preserve")
>@@ -161,7 +161,7 @@ void SVGTextContentElement::collectStyleForPresentationAttribute(const Qualified
> SVGGraphicsElement::collectStyleForPresentationAttribute(name, value, style);
> }
> 
>-void SVGTextContentElement::parseAttribute(const QualifiedName& name, const AtomicString& value)
>+void SVGTextContentElement::parseAttribute(const QualifiedName& name, const AtomString& value)
> {
> SVGParsingError parseError = NoError;
> 
>diff --git a/Source/WebCore/svg/SVGTextContentElement.h b/Source/WebCore/svg/SVGTextContentElement.h
>index 0e6da5c67785cf41657434aa2b95c6fc17e0f0dc..58a7d3771487bed3e670930b95c6ffa8b561b5c8 100644
>--- a/Source/WebCore/svg/SVGTextContentElement.h
>+++ b/Source/WebCore/svg/SVGTextContentElement.h
>@@ -97,9 +97,9 @@ protected:
> 
> bool isValid() const override { return SVGTests::isValid(); }
> 
>- void parseAttribute(const QualifiedName&, const AtomicString&) override;
>+ void parseAttribute(const QualifiedName&, const AtomString&) override;
> bool isPresentationAttribute(const QualifiedName&) const override;
>- void collectStyleForPresentationAttribute(const QualifiedName&, const AtomicString&, MutableStyleProperties&) override;
>+ void collectStyleForPresentationAttribute(const QualifiedName&, const AtomString&, MutableStyleProperties&) override;
> void svgAttributeChanged(const QualifiedName&) override;
> 
> bool selfHasRelativeLengths() const override;
>diff --git a/Source/WebCore/svg/SVGTextPathElement.cpp b/Source/WebCore/svg/SVGTextPathElement.cpp
>index f20c67bdeae4177c4b3854692ed48548f2127ee1..76fbba7926fcd20190efe2f7c15ebf7bd178f287 100644
>--- a/Source/WebCore/svg/SVGTextPathElement.cpp
>+++ b/Source/WebCore/svg/SVGTextPathElement.cpp
>@@ -62,7 +62,7 @@ void SVGTextPathElement::clearResourceReferences()
> document().accessSVGExtensions().removeAllTargetReferencesForElement(*this);
> }
> 
>-void SVGTextPathElement::parseAttribute(const QualifiedName& name, const AtomicString& value)
>+void SVGTextPathElement::parseAttribute(const QualifiedName& name, const AtomString& value)
> {
> SVGParsingError parseError = NoError;
> 
>diff --git a/Source/WebCore/svg/SVGTextPathElement.h b/Source/WebCore/svg/SVGTextPathElement.h
>index 435387bfaf57be437f9da25eba5697c77fba7c9d..5677f5beb237fc382b4c0d2ebba8dba2e4a9d285 100644
>--- a/Source/WebCore/svg/SVGTextPathElement.h
>+++ b/Source/WebCore/svg/SVGTextPathElement.h
>@@ -129,7 +129,7 @@ private:
> using PropertyRegistry = SVGPropertyOwnerRegistry<SVGTextPathElement, SVGTextContentElement, SVGURIReference>;
> const SVGPropertyRegistry& propertyRegistry() const final { return m_propertyRegistry; }
> 
>- void parseAttribute(const QualifiedName&, const AtomicString&) override;
>+ void parseAttribute(const QualifiedName&, const AtomString&) override;
> void svgAttributeChanged(const QualifiedName&) override;
> 
> RenderPtr<RenderElement> createElementRenderer(RenderStyle&&, const RenderTreePosition&) override;
>diff --git a/Source/WebCore/svg/SVGTextPositioningElement.cpp b/Source/WebCore/svg/SVGTextPositioningElement.cpp
>index a6642a014ce7107a0d9fc44e1d2d276b695fa1af..2488cc36499f4a9494cf4661db1a31e454ee64a0 100644
>--- a/Source/WebCore/svg/SVGTextPositioningElement.cpp
>+++ b/Source/WebCore/svg/SVGTextPositioningElement.cpp
>@@ -50,7 +50,7 @@ SVGTextPositioningElement::SVGTextPositioningElement(const QualifiedName& tagNam
> });
> }
> 
>-void SVGTextPositioningElement::parseAttribute(const QualifiedName& name, const AtomicString& value)
>+void SVGTextPositioningElement::parseAttribute(const QualifiedName& name, const AtomString& value)
> {
> if (name == SVGNames::xAttr) {
> m_x->baseVal()->parse(value);
>@@ -80,7 +80,7 @@ void SVGTextPositioningElement::parseAttribute(const QualifiedName& name, const
> SVGTextContentElement::parseAttribute(name, value);
> }
> 
>-void SVGTextPositioningElement::collectStyleForPresentationAttribute(const QualifiedName& name, const AtomicString& value, MutableStyleProperties& style)
>+void SVGTextPositioningElement::collectStyleForPresentationAttribute(const QualifiedName& name, const AtomString& value, MutableStyleProperties& style)
> {
> if (name == SVGNames::xAttr || name == SVGNames::yAttr)
> return;
>diff --git a/Source/WebCore/svg/SVGTextPositioningElement.h b/Source/WebCore/svg/SVGTextPositioningElement.h
>index a4862ec4762965997430fa84d68d9719b34765ba..0e7134c138357c6cdb3db57c1d6242f31317f977 100644
>--- a/Source/WebCore/svg/SVGTextPositioningElement.h
>+++ b/Source/WebCore/svg/SVGTextPositioningElement.h
>@@ -47,12 +47,12 @@ public:
> protected:
> SVGTextPositioningElement(const QualifiedName&, Document&);
> 
>- void parseAttribute(const QualifiedName&, const AtomicString&) override;
>+ void parseAttribute(const QualifiedName&, const AtomString&) override;
> void svgAttributeChanged(const QualifiedName&) override;
> 
> private:
> bool isPresentationAttribute(const QualifiedName&) const final;
>- void collectStyleForPresentationAttribute(const QualifiedName&, const AtomicString&, MutableStyleProperties&) final;
>+ void collectStyleForPresentationAttribute(const QualifiedName&, const AtomString&, MutableStyleProperties&) final;
> 
> const SVGPropertyRegistry& propertyRegistry() const override { return m_propertyRegistry; }
> 
>diff --git a/Source/WebCore/svg/SVGURIReference.cpp b/Source/WebCore/svg/SVGURIReference.cpp
>index 4c0e266e042eb25bf68adcf81612c7a93c03a704..53da59c7abc446ac3fd6bbcfcba2551b1d178c0d 100644
>--- a/Source/WebCore/svg/SVGURIReference.cpp
>+++ b/Source/WebCore/svg/SVGURIReference.cpp
>@@ -45,7 +45,7 @@ bool SVGURIReference::isKnownAttribute(const QualifiedName& attributeName)
> return PropertyRegistry::isKnownAttribute(attributeName);
> }
> 
>-void SVGURIReference::parseAttribute(const QualifiedName& name, const AtomicString& value)
>+void SVGURIReference::parseAttribute(const QualifiedName& name, const AtomString& value)
> {
> if (isKnownAttribute(name))
> m_href->setBaseValInternal(value);
>diff --git a/Source/WebCore/svg/SVGURIReference.h b/Source/WebCore/svg/SVGURIReference.h
>index 201b6c71bed7139a9c6e2ed00d62b2df41f6d750..0fd104fe4e43ac97e98634797d0414137184f42b 100644
>--- a/Source/WebCore/svg/SVGURIReference.h
>+++ b/Source/WebCore/svg/SVGURIReference.h
>@@ -34,7 +34,7 @@ class SVGURIReference {
> public:
> virtual ~SVGURIReference() = default;
> 
>- void parseAttribute(const QualifiedName&, const AtomicString&);
>+ void parseAttribute(const QualifiedName&, const AtomString&);
> 
> static String fragmentIdentifierFromIRIString(const String&, const Document&);
> 
>diff --git a/Source/WebCore/svg/SVGUseElement.cpp b/Source/WebCore/svg/SVGUseElement.cpp
>index e08ae5a4a9a8f92eb0103b4d9652c40bba159321..9a729842ed2d9b66699100eb75dd318b582ad9e7 100644
>--- a/Source/WebCore/svg/SVGUseElement.cpp
>+++ b/Source/WebCore/svg/SVGUseElement.cpp
>@@ -75,7 +75,7 @@ SVGUseElement::~SVGUseElement()
> m_externalDocument->removeClient(*this);
> }
> 
>-void SVGUseElement::parseAttribute(const QualifiedName& name, const AtomicString& value)
>+void SVGUseElement::parseAttribute(const QualifiedName& name, const AtomString& value)
> {
> SVGParsingError parseError = NoError;
> 
>@@ -144,14 +144,14 @@ void SVGUseElement::transferSizeAttributesToTargetClone(SVGElement& shadowElemen
> // If attributes width and/or height are provided on the 'use' element, then these attributes
> // will be transferred to the generated 'svg'. If attributes width and/or height are not specified,
> // the generated 'svg' element will use values of 100% for these attributes.
>- shadowElement.setAttribute(SVGNames::widthAttr, width().valueInSpecifiedUnits() ? AtomicString(width().valueAsString()) : "100%");
>- shadowElement.setAttribute(SVGNames::heightAttr, height().valueInSpecifiedUnits() ? AtomicString(height().valueAsString()) : "100%");
>+ shadowElement.setAttribute(SVGNames::widthAttr, width().valueInSpecifiedUnits() ? AtomString(width().valueAsString()) : "100%");
>+ shadowElement.setAttribute(SVGNames::heightAttr, height().valueInSpecifiedUnits() ? AtomString(height().valueAsString()) : "100%");
> } else if (is<SVGSVGElement>(shadowElement)) {
> // Spec (<use> on <svg>): If attributes width and/or height are provided on the 'use' element, then these
> // values will override the corresponding attributes on the 'svg' in the generated tree.
> auto correspondingElement = makeRefPtr(shadowElement.correspondingElement());
>- shadowElement.setAttribute(SVGNames::widthAttr, width().valueInSpecifiedUnits() ? AtomicString(width().valueAsString()) : (correspondingElement ? correspondingElement->getAttribute(SVGNames::widthAttr) : nullAtom()));
>- shadowElement.setAttribute(SVGNames::heightAttr, height().valueInSpecifiedUnits() ? AtomicString(height().valueAsString()) : (correspondingElement ? correspondingElement->getAttribute(SVGNames::heightAttr) : nullAtom()));
>+ shadowElement.setAttribute(SVGNames::widthAttr, width().valueInSpecifiedUnits() ? AtomString(width().valueAsString()) : (correspondingElement ? correspondingElement->getAttribute(SVGNames::widthAttr) : nullAtom()));
>+ shadowElement.setAttribute(SVGNames::heightAttr, height().valueInSpecifiedUnits() ? AtomString(height().valueAsString()) : (correspondingElement ? correspondingElement->getAttribute(SVGNames::heightAttr) : nullAtom()));
> }
> }
> 
>@@ -184,14 +184,14 @@ void SVGUseElement::svgAttributeChanged(const QualifiedName& attrName)
> SVGExternalResourcesRequired::svgAttributeChanged(attrName);
> }
> 
>-static HashSet<AtomicString> createAllowedElementSet()
>+static HashSet<AtomString> createAllowedElementSet()
> {
> // Spec: "Any 'svg', 'symbol', 'g', graphics element or other 'use' is potentially a template object that can be re-used
> // (i.e., "instanced") in the SVG document via a 'use' element."
> // "Graphics Element" is defined as 'circle', 'ellipse', 'image', 'line', 'path', 'polygon', 'polyline', 'rect', 'text'
> // Excluded are anything that is used by reference or that only make sense to appear once in a document.
> using namespace SVGNames;
>- HashSet<AtomicString> set;
>+ HashSet<AtomString> set;
> for (auto& tag : { aTag.get(), circleTag.get(), descTag.get(), ellipseTag.get(), gTag.get(), imageTag.get(), lineTag.get(), metadataTag.get(), pathTag.get(), polygonTag.get(), polylineTag.get(), rectTag.get(), svgTag.get(), switchTag.get(), symbolTag.get(), textTag.get(), textPathTag.get(), titleTag.get(), trefTag.get(), tspanTag.get(), useTag.get() })
> set.add(tag.localName());
> return set;
>@@ -199,7 +199,7 @@ static HashSet<AtomicString> createAllowedElementSet()
> 
> static inline bool isDisallowedElement(const SVGElement& element)
> {
>- static NeverDestroyed<HashSet<AtomicString>> set = createAllowedElementSet();
>+ static NeverDestroyed<HashSet<AtomString>> set = createAllowedElementSet();
> return !set.get().contains(element.localName());
> }
> 
>diff --git a/Source/WebCore/svg/SVGUseElement.h b/Source/WebCore/svg/SVGUseElement.h
>index 039081d166eada7b5200b604b70e39c4feaa1bdb..1f52bc1dcf0d2192305a65af805be6d31d070cfb 100644
>--- a/Source/WebCore/svg/SVGUseElement.h
>+++ b/Source/WebCore/svg/SVGUseElement.h
>@@ -66,7 +66,7 @@ private:
> using PropertyRegistry = SVGPropertyOwnerRegistry<SVGUseElement, SVGGraphicsElement, SVGExternalResourcesRequired, SVGURIReference>;
> const SVGPropertyRegistry& propertyRegistry() const final { return m_propertyRegistry; }
> 
>- void parseAttribute(const QualifiedName&, const AtomicString&) override;
>+ void parseAttribute(const QualifiedName&, const AtomString&) override;
> void svgAttributeChanged(const QualifiedName&) override;
> 
> RenderPtr<RenderElement> createElementRenderer(RenderStyle&&, const RenderTreePosition&) override;
>diff --git a/Source/WebCore/svg/SVGViewElement.cpp b/Source/WebCore/svg/SVGViewElement.cpp
>index 3396c6e98236b64e8695ff0419e80269577b473a..273382ce40f686b80e36e935abe654b2f29ac872 100644
>--- a/Source/WebCore/svg/SVGViewElement.cpp
>+++ b/Source/WebCore/svg/SVGViewElement.cpp
>@@ -48,7 +48,7 @@ Ref<SVGViewElement> SVGViewElement::create(const QualifiedName& tagName, Documen
> return adoptRef(*new SVGViewElement(tagName, document));
> }
> 
>-void SVGViewElement::parseAttribute(const QualifiedName& name, const AtomicString& value)
>+void SVGViewElement::parseAttribute(const QualifiedName& name, const AtomString& value)
> {
> if (name == SVGNames::viewTargetAttr) {
> m_viewTarget->reset(value);
>diff --git a/Source/WebCore/svg/SVGViewElement.h b/Source/WebCore/svg/SVGViewElement.h
>index b0eef19d7c495051878a8815ae462da95084e07c..538f8644243591a04577c15494416f60be07c762 100644
>--- a/Source/WebCore/svg/SVGViewElement.h
>+++ b/Source/WebCore/svg/SVGViewElement.h
>@@ -46,7 +46,7 @@ private:
> const SVGPropertyRegistry& propertyRegistry() const final { return m_propertyRegistry; }
> 
> // FIXME(webkit.org/b/196554): svgAttributeChanged missing.
>- void parseAttribute(const QualifiedName&, const AtomicString&) final;
>+ void parseAttribute(const QualifiedName&, const AtomString&) final;
> 
> bool rendererIsNeeded(const RenderStyle&) final { return false; }
> 
>diff --git a/Source/WebCore/svg/SVGZoomAndPan.cpp b/Source/WebCore/svg/SVGZoomAndPan.cpp
>index 14d8fcb77ea5801d65109f453da250362311276d..75a831c3c86bb521b59cc1bdaa3c674396187f88 100644
>--- a/Source/WebCore/svg/SVGZoomAndPan.cpp
>+++ b/Source/WebCore/svg/SVGZoomAndPan.cpp
>@@ -41,7 +41,7 @@ bool SVGZoomAndPan::parseZoomAndPan(const UChar*& start, const UChar* end)
> return false;
> }
> 
>-void SVGZoomAndPan::parseAttribute(const QualifiedName& attributeName, const AtomicString& value)
>+void SVGZoomAndPan::parseAttribute(const QualifiedName& attributeName, const AtomString& value)
> {
> if (attributeName != SVGNames::zoomAndPanAttr)
> return;
>diff --git a/Source/WebCore/svg/SVGZoomAndPan.h b/Source/WebCore/svg/SVGZoomAndPan.h
>index 9fbcfb09ac3ad016b8fe2d292dab23562a5254a7..1904194999eb1cdbd079f4e1833c31fbb2c7c5a0 100644
>--- a/Source/WebCore/svg/SVGZoomAndPan.h
>+++ b/Source/WebCore/svg/SVGZoomAndPan.h
>@@ -43,7 +43,7 @@ public:
> ExceptionOr<void> setZoomAndPan(unsigned) { return Exception { NoModificationAllowedError }; }
> void reset() { m_zoomAndPan = SVGPropertyTraits<SVGZoomAndPanType>::initialValue(); }
> 
>- void parseAttribute(const QualifiedName&, const AtomicString&);
>+ void parseAttribute(const QualifiedName&, const AtomString&);
> 
> protected:
> SVGZoomAndPan() = default;
>diff --git a/Source/WebCore/svg/animation/SVGSMILElement.cpp b/Source/WebCore/svg/animation/SVGSMILElement.cpp
>index 74d2b209a0ffaf8bab2e6db945964dc978176653..81d17f409a7721483e030083f1ef99320ee2dc67 100644
>--- a/Source/WebCore/svg/animation/SVGSMILElement.cpp
>+++ b/Source/WebCore/svg/animation/SVGSMILElement.cpp
>@@ -219,7 +219,7 @@ inline QualifiedName SVGSMILElement::constructAttributeName() const
> if (parseResult.hasException())
> return anyQName();
> 
>- AtomicString prefix, localName;
>+ AtomString prefix, localName;
> std::tie(prefix, localName) = parseResult.releaseReturnValue();
> 
> if (prefix.isNull())
>@@ -341,7 +341,7 @@ SMILTime SVGSMILElement::parseClockValue(const String& data)
> 
> String parse = data.stripWhiteSpace();
> 
>- static NeverDestroyed<const AtomicString> indefiniteValue("indefinite", AtomicString::ConstructFromLiteral);
>+ static NeverDestroyed<const AtomString> indefiniteValue("indefinite", AtomString::ConstructFromLiteral);
> if (parse == indefiniteValue)
> return SMILTime::indefinite();
> 
>@@ -477,7 +477,7 @@ bool SVGSMILElement::isSupportedAttribute(const QualifiedName& attrName)
> return supportedAttributes.get().contains<SVGAttributeHashTranslator>(attrName);
> }
> 
>-void SVGSMILElement::parseAttribute(const QualifiedName& name, const AtomicString& value)
>+void SVGSMILElement::parseAttribute(const QualifiedName& name, const AtomString& value)
> {
> if (name == SVGNames::beginAttr) {
> if (!m_conditions.isEmpty()) {
>@@ -653,9 +653,9 @@ bool SVGSMILElement::isFrozen() const
> 
> SVGSMILElement::Restart SVGSMILElement::restart() const
> { 
>- static NeverDestroyed<const AtomicString> never("never", AtomicString::ConstructFromLiteral);
>- static NeverDestroyed<const AtomicString> whenNotActive("whenNotActive", AtomicString::ConstructFromLiteral);
>- const AtomicString& value = attributeWithoutSynchronization(SVGNames::restartAttr);
>+ static NeverDestroyed<const AtomString> never("never", AtomString::ConstructFromLiteral);
>+ static NeverDestroyed<const AtomString> whenNotActive("whenNotActive", AtomString::ConstructFromLiteral);
>+ const AtomString& value = attributeWithoutSynchronization(SVGNames::restartAttr);
> if (value == never)
> return RestartNever;
> if (value == whenNotActive)
>@@ -665,8 +665,8 @@ SVGSMILElement::Restart SVGSMILElement::restart() const
> 
> SVGSMILElement::FillMode SVGSMILElement::fill() const
> { 
>- static NeverDestroyed<const AtomicString> freeze("freeze", AtomicString::ConstructFromLiteral);
>- const AtomicString& value = attributeWithoutSynchronization(SVGNames::fillAttr);
>+ static NeverDestroyed<const AtomString> freeze("freeze", AtomString::ConstructFromLiteral);
>+ const AtomString& value = attributeWithoutSynchronization(SVGNames::fillAttr);
> return value == freeze ? FillFreeze : FillRemove;
> }
> 
>@@ -674,7 +674,7 @@ SMILTime SVGSMILElement::dur() const
> { 
> if (m_cachedDur != invalidCachedTime)
> return m_cachedDur;
>- const AtomicString& value = attributeWithoutSynchronization(SVGNames::durAttr);
>+ const AtomString& value = attributeWithoutSynchronization(SVGNames::durAttr);
> SMILTime clockValue = parseClockValue(value);
> return m_cachedDur = clockValue <= 0 ? SMILTime::unresolved() : clockValue;
> }
>@@ -683,7 +683,7 @@ SMILTime SVGSMILElement::repeatDur() const
> { 
> if (m_cachedRepeatDur != invalidCachedTime)
> return m_cachedRepeatDur;
>- const AtomicString& value = attributeWithoutSynchronization(SVGNames::repeatDurAttr);
>+ const AtomString& value = attributeWithoutSynchronization(SVGNames::repeatDurAttr);
> SMILTime clockValue = parseClockValue(value);
> m_cachedRepeatDur = clockValue <= 0 ? SMILTime::unresolved() : clockValue;
> return m_cachedRepeatDur;
>@@ -694,11 +694,11 @@ SMILTime SVGSMILElement::repeatCount() const
> { 
> if (m_cachedRepeatCount != invalidCachedTime)
> return m_cachedRepeatCount;
>- const AtomicString& value = attributeWithoutSynchronization(SVGNames::repeatCountAttr);
>+ const AtomString& value = attributeWithoutSynchronization(SVGNames::repeatCountAttr);
> if (value.isNull())
> return SMILTime::unresolved();
> 
>- static NeverDestroyed<const AtomicString> indefiniteValue("indefinite", AtomicString::ConstructFromLiteral);
>+ static NeverDestroyed<const AtomString> indefiniteValue("indefinite", AtomString::ConstructFromLiteral);
> if (value == indefiniteValue)
> return SMILTime::indefinite();
> bool ok;
>@@ -710,7 +710,7 @@ SMILTime SVGSMILElement::maxValue() const
> { 
> if (m_cachedMax != invalidCachedTime)
> return m_cachedMax;
>- const AtomicString& value = attributeWithoutSynchronization(SVGNames::maxAttr);
>+ const AtomString& value = attributeWithoutSynchronization(SVGNames::maxAttr);
> SMILTime result = parseClockValue(value);
> return m_cachedMax = (result.isUnresolved() || result <= 0) ? SMILTime::indefinite() : result;
> }
>@@ -719,7 +719,7 @@ SMILTime SVGSMILElement::minValue() const
> { 
> if (m_cachedMin != invalidCachedTime)
> return m_cachedMin;
>- const AtomicString& value = attributeWithoutSynchronization(SVGNames::minAttr);
>+ const AtomString& value = attributeWithoutSynchronization(SVGNames::minAttr);
> SMILTime result = parseClockValue(value);
> return m_cachedMin = (result.isUnresolved() || result < 0) ? 0 : result;
> }
>@@ -1225,7 +1225,7 @@ void SVGSMILElement::endedActiveInterval()
> void SVGSMILElement::dispatchPendingEvent(SMILEventSender* eventSender)
> {
> ASSERT(eventSender == &smilBeginEventSender() || eventSender == &smilEndEventSender());
>- const AtomicString& eventType = eventSender->eventType();
>+ const AtomString& eventType = eventSender->eventType();
> dispatchEvent(Event::create(eventType, Event::CanBubble::No, Event::IsCancelable::No));
> }
> 
>diff --git a/Source/WebCore/svg/animation/SVGSMILElement.h b/Source/WebCore/svg/animation/SVGSMILElement.h
>index ef9924af96a53175df2c0265dde2eea96b092ef4..069bc831cb111390006967ca267a713f858e7416 100644
>--- a/Source/WebCore/svg/animation/SVGSMILElement.h
>+++ b/Source/WebCore/svg/animation/SVGSMILElement.h
>@@ -46,7 +46,7 @@ public:
> SVGSMILElement(const QualifiedName&, Document&);
> virtual ~SVGSMILElement();
> 
>- void parseAttribute(const QualifiedName&, const AtomicString&) override;
>+ void parseAttribute(const QualifiedName&, const AtomString&) override;
> void svgAttributeChanged(const QualifiedName&) override;
> InsertedIntoAncestorResult insertedIntoAncestor(InsertionType, ContainerNode&) override;
> void removedFromAncestor(RemovalType, ContainerNode&) override;
>diff --git a/Source/WebCore/svg/graphics/filters/SVGFilterBuilder.cpp b/Source/WebCore/svg/graphics/filters/SVGFilterBuilder.cpp
>index 97ea55e8c087978bdef5b82de857e70f9f7f522e..d2e32859cbfe87c637e568cdf1476d91c09c7b30 100644
>--- a/Source/WebCore/svg/graphics/filters/SVGFilterBuilder.cpp
>+++ b/Source/WebCore/svg/graphics/filters/SVGFilterBuilder.cpp
>@@ -33,7 +33,7 @@ SVGFilterBuilder::SVGFilterBuilder(RefPtr<FilterEffect> sourceGraphic)
> addBuiltinEffects();
> }
> 
>-void SVGFilterBuilder::add(const AtomicString& id, RefPtr<FilterEffect> effect)
>+void SVGFilterBuilder::add(const AtomString& id, RefPtr<FilterEffect> effect)
> {
> if (id.isEmpty()) {
> m_lastEffect = effect;
>@@ -47,7 +47,7 @@ void SVGFilterBuilder::add(const AtomicString& id, RefPtr<FilterEffect> effect)
> m_namedEffects.set(id, m_lastEffect);
> }
> 
>-RefPtr<FilterEffect> SVGFilterBuilder::getEffectById(const AtomicString& id) const
>+RefPtr<FilterEffect> SVGFilterBuilder::getEffectById(const AtomString& id) const
> {
> if (id.isEmpty()) {
> if (m_lastEffect)
>diff --git a/Source/WebCore/svg/graphics/filters/SVGFilterBuilder.h b/Source/WebCore/svg/graphics/filters/SVGFilterBuilder.h
>index f68abdb3d00734d263abde9f66970c54ebadafe9..d970302adf86585509c6508d504952a25532362b 100644
>--- a/Source/WebCore/svg/graphics/filters/SVGFilterBuilder.h
>+++ b/Source/WebCore/svg/graphics/filters/SVGFilterBuilder.h
>@@ -24,7 +24,7 @@
> #include "SVGUnitTypes.h"
> #include <wtf/HashMap.h>
> #include <wtf/HashSet.h>
>-#include <wtf/text/AtomicStringHash.h>
>+#include <wtf/text/AtomStringHash.h>
> #include <wtf/text/WTFString.h>
> 
> namespace WebCore {
>@@ -44,9 +44,9 @@ public:
> SVGUnitTypes::SVGUnitType primitiveUnits() const { return m_primitiveUnits; }
> void setPrimitiveUnits(SVGUnitTypes::SVGUnitType units) { m_primitiveUnits = units; }
> 
>- void add(const AtomicString& id, RefPtr<FilterEffect>);
>+ void add(const AtomString& id, RefPtr<FilterEffect>);
> 
>- RefPtr<FilterEffect> getEffectById(const AtomicString&) const;
>+ RefPtr<FilterEffect> getEffectById(const AtomString&) const;
> FilterEffect* lastEffect() const { return m_lastEffect.get(); }
> 
> void appendEffectToEffectReferences(RefPtr<FilterEffect>&&, RenderObject*);
>@@ -71,8 +71,8 @@ private:
> m_effectReferences.add(effect, FilterEffectSet());
> }
> 
>- HashMap<AtomicString, RefPtr<FilterEffect>> m_builtinEffects;
>- HashMap<AtomicString, RefPtr<FilterEffect>> m_namedEffects;
>+ HashMap<AtomString, RefPtr<FilterEffect>> m_builtinEffects;
>+ HashMap<AtomString, RefPtr<FilterEffect>> m_namedEffects;
> // The value is a list, which contains those filter effects,
> // which depends on the key filter effect.
> HashMap<RefPtr<FilterEffect>, FilterEffectSet> m_effectReferences;
>diff --git a/Source/WebCore/svg/properties/SVGAnimatedPropertyDescription.h b/Source/WebCore/svg/properties/SVGAnimatedPropertyDescription.h
>index f1d9a04b0ff3f61f62c2a9a328363ccae2730b5c..7fa82c618d6bbe4576740ca68503e1842eb9cfce 100644
>--- a/Source/WebCore/svg/properties/SVGAnimatedPropertyDescription.h
>+++ b/Source/WebCore/svg/properties/SVGAnimatedPropertyDescription.h
>@@ -22,7 +22,7 @@
> #pragma once
> 
> #include <wtf/HashMap.h>
>-#include <wtf/text/AtomicString.h>
>+#include <wtf/text/AtomString.h>
> 
> namespace WebCore {
> 
>@@ -47,7 +47,7 @@ struct SVGAnimatedPropertyDescription {
> return m_element == reinterpret_cast<SVGElement*>(-1);
> }
> 
>- SVGAnimatedPropertyDescription(SVGElement* element, const AtomicString& attributeName)
>+ SVGAnimatedPropertyDescription(SVGElement* element, const AtomString& attributeName)
> : m_element(element)
> , m_attributeName(attributeName.impl())
> {
>@@ -61,7 +61,7 @@ struct SVGAnimatedPropertyDescription {
> }
> 
> SVGElement* m_element;
>- AtomicStringImpl* m_attributeName;
>+ AtomStringImpl* m_attributeName;
> };
> 
> struct SVGAnimatedPropertyDescriptionHash {
>diff --git a/Source/WebCore/svg/properties/SVGAnimationAdditiveValueFunctionImpl.cpp b/Source/WebCore/svg/properties/SVGAnimationAdditiveValueFunctionImpl.cpp
>index 1b1cbeb3a5460ec1c8d8480ef70dd7b20609fa78..72b25b5b8cc2fc1e701c7919e3392767c231405d 100644
>--- a/Source/WebCore/svg/properties/SVGAnimationAdditiveValueFunctionImpl.cpp
>+++ b/Source/WebCore/svg/properties/SVGAnimationAdditiveValueFunctionImpl.cpp
>@@ -33,7 +33,7 @@ namespace WebCore {
> 
> Color SVGAnimationColorFunction::colorFromString(SVGElement* targetElement, const String& string)
> {
>- static NeverDestroyed<const AtomicString> currentColor("currentColor", AtomicString::ConstructFromLiteral);
>+ static NeverDestroyed<const AtomString> currentColor("currentColor", AtomString::ConstructFromLiteral);
> 
> if (string != currentColor.get())
> return SVGPropertyTraits<Color>::fromString(string);
>diff --git a/Source/WebCore/svg/properties/SVGPropertyAnimator.h b/Source/WebCore/svg/properties/SVGPropertyAnimator.h
>index f5e8b1bd3041265c49e5a05aa2f729e3f55a58f7..21e883fe244838ff3746869bf11a3df46ff4be2a 100644
>--- a/Source/WebCore/svg/properties/SVGPropertyAnimator.h
>+++ b/Source/WebCore/svg/properties/SVGPropertyAnimator.h
>@@ -72,7 +72,7 @@ protected:
> 
> String adjustForInheritance(SVGElement* targetElement, const String& value) const
> {
>- static NeverDestroyed<const AtomicString> inherit("inherit", AtomicString::ConstructFromLiteral);
>+ static NeverDestroyed<const AtomString> inherit("inherit", AtomString::ConstructFromLiteral);
> return value == inherit ? computeInheritedCSSPropertyValue(targetElement) : value;
> }
> 
>diff --git a/Source/WebCore/testing/InternalSettings.h b/Source/WebCore/testing/InternalSettings.h
>index fa73394d06e8751b3c73d0724aa8c280c50beff5..a04c4021f28c5c3cb194d6352c0c41c56f8d2cf9 100644
>--- a/Source/WebCore/testing/InternalSettings.h
>+++ b/Source/WebCore/testing/InternalSettings.h
>@@ -27,7 +27,7 @@
> #pragma once
> 
> // FIXME (121927): This include should not be needed.
>-#include <wtf/text/AtomicStringHash.h>
>+#include <wtf/text/AtomStringHash.h>
> 
> #include "EditingBehaviorTypes.h"
> #include "ExceptionOr.h"
>diff --git a/Source/WebCore/testing/Internals.cpp b/Source/WebCore/testing/Internals.cpp
>index 22f1065212a0fa5c5c62ea0a5bc09b8d3bd43789..7efc7c4469712f06c734fee2fadc534532047c4a 100644
>--- a/Source/WebCore/testing/Internals.cpp
>+++ b/Source/WebCore/testing/Internals.cpp
>@@ -1053,7 +1053,7 @@ ExceptionOr<bool> Internals::pauseAnimationAtTimeOnElement(const String& animati
> {
> if (pauseTime < 0)
> return Exception { InvalidAccessError };
>- return frame()->animation().pauseAnimationAtTime(element, AtomicString(animationName), pauseTime);
>+ return frame()->animation().pauseAnimationAtTime(element, AtomString(animationName), pauseTime);
> }
> 
> ExceptionOr<bool> Internals::pauseAnimationAtTimeOnPseudoElement(const String& animationName, double pauseTime, Element& element, const String& pseudoId)
>@@ -1068,7 +1068,7 @@ ExceptionOr<bool> Internals::pauseAnimationAtTimeOnPseudoElement(const String& a
> if (!pseudoElement)
> return Exception { InvalidAccessError };
> 
>- return frame()->animation().pauseAnimationAtTime(*pseudoElement, AtomicString(animationName), pauseTime);
>+ return frame()->animation().pauseAnimationAtTime(*pseudoElement, AtomString(animationName), pauseTime);
> }
> 
> ExceptionOr<bool> Internals::pauseTransitionAtTimeOnElement(const String& propertyName, double pauseTime, Element& element)
>@@ -3715,12 +3715,12 @@ void Internals::initializeMockMediaSource()
> MediaPlayerFactorySupport::callRegisterMediaEngine(MockMediaPlayerMediaSource::registerMediaEngine);
> }
> 
>-Vector<String> Internals::bufferedSamplesForTrackID(SourceBuffer& buffer, const AtomicString& trackID)
>+Vector<String> Internals::bufferedSamplesForTrackID(SourceBuffer& buffer, const AtomString& trackID)
> {
> return buffer.bufferedSamplesForTrackID(trackID);
> }
> 
>-Vector<String> Internals::enqueuedSamplesForTrackID(SourceBuffer& buffer, const AtomicString& trackID)
>+Vector<String> Internals::enqueuedSamplesForTrackID(SourceBuffer& buffer, const AtomString& trackID)
> {
> return buffer.enqueuedSamplesForTrackID(trackID);
> }
>diff --git a/Source/WebCore/testing/Internals.h b/Source/WebCore/testing/Internals.h
>index 38e5f7bf1e92c30470dd3fa0ce6ee946b9142917..0c03d68646ae6b4cc42cbe139f0a7c0c645308fc 100644
>--- a/Source/WebCore/testing/Internals.h
>+++ b/Source/WebCore/testing/Internals.h
>@@ -571,8 +571,8 @@ public:
> 
> #if ENABLE(MEDIA_SOURCE)
> WEBCORE_TESTSUPPORT_EXPORT void initializeMockMediaSource();
>- Vector<String> bufferedSamplesForTrackID(SourceBuffer&, const AtomicString&);
>- Vector<String> enqueuedSamplesForTrackID(SourceBuffer&, const AtomicString&);
>+ Vector<String> bufferedSamplesForTrackID(SourceBuffer&, const AtomString&);
>+ Vector<String> enqueuedSamplesForTrackID(SourceBuffer&, const AtomString&);
> void setShouldGenerateTimestamps(SourceBuffer&, bool);
> #endif
> 
>diff --git a/Source/WebCore/testing/MockCDMFactory.cpp b/Source/WebCore/testing/MockCDMFactory.cpp
>index 7d869b4d4a62dbf4f13dd02560742927078ff22a..04fbf274302bcf5e9b8bc174d043e4255daf748a 100644
>--- a/Source/WebCore/testing/MockCDMFactory.cpp
>+++ b/Source/WebCore/testing/MockCDMFactory.cpp
>@@ -108,7 +108,7 @@ MockCDM::MockCDM(WeakPtr<MockCDMFactory> factory)
> {
> }
> 
>-bool MockCDM::supportsInitDataType(const AtomicString& initDataType) const
>+bool MockCDM::supportsInitDataType(const AtomString& initDataType) const
> {
> if (m_factory)
> return m_factory->supportedDataTypes().contains(initDataType);
>@@ -197,7 +197,7 @@ bool MockCDM::supportsSessions() const
> return m_factory && m_factory->supportsSessions();
> }
> 
>-bool MockCDM::supportsInitData(const AtomicString& initDataType, const SharedBuffer& initData) const
>+bool MockCDM::supportsInitData(const AtomString& initDataType, const SharedBuffer& initData) const
> {
> if (!supportsInitDataType(initDataType))
> return false;
>@@ -299,7 +299,7 @@ MockCDMInstanceSession::MockCDMInstanceSession(WeakPtr<MockCDMInstance>&& instan
> {
> }
> 
>-void MockCDMInstanceSession::requestLicense(LicenseType licenseType, const AtomicString& initDataType, Ref<SharedBuffer>&& initData, LicenseCallback&& callback)
>+void MockCDMInstanceSession::requestLicense(LicenseType licenseType, const AtomString& initDataType, Ref<SharedBuffer>&& initData, LicenseCallback&& callback)
> {
> MockCDMFactory* factory = m_instance ? m_instance->factory() : nullptr;
> if (!factory) {
>diff --git a/Source/WebCore/testing/MockCDMFactory.h b/Source/WebCore/testing/MockCDMFactory.h
>index 5cadf28d654a1dd02bdd18a8e88269a77b0400d7..3396cd02ad02dd14e92f1579e27516e6bc3f4298 100644
>--- a/Source/WebCore/testing/MockCDMFactory.h
>+++ b/Source/WebCore/testing/MockCDMFactory.h
>@@ -46,7 +46,7 @@ public:
> static Ref<MockCDMFactory> create() { return adoptRef(*new MockCDMFactory); }
> ~MockCDMFactory();
> 
>- const Vector<AtomicString>& supportedDataTypes() const { return m_supportedDataTypes; }
>+ const Vector<AtomString>& supportedDataTypes() const { return m_supportedDataTypes; }
> void setSupportedDataTypes(Vector<String>&&);
> 
> const Vector<MediaKeySessionType>& supportedSessionTypes() const { return m_supportedSessionTypes; }
>@@ -88,7 +88,7 @@ private:
> 
> MediaKeysRequirement m_distinctiveIdentifiersRequirement { MediaKeysRequirement::Optional };
> MediaKeysRequirement m_persistentStateRequirement { MediaKeysRequirement::Optional };
>- Vector<AtomicString> m_supportedDataTypes;
>+ Vector<AtomString> m_supportedDataTypes;
> Vector<MediaKeySessionType> m_supportedSessionTypes;
> Vector<String> m_supportedRobustness;
> Vector<MediaKeyEncryptionScheme> m_supportedEncryptionSchemes;
>@@ -108,7 +108,7 @@ public:
> private:
> friend class MockCDMInstance;
> 
>- bool supportsInitDataType(const AtomicString&) const final;
>+ bool supportsInitDataType(const AtomString&) const final;
> bool supportsConfiguration(const MediaKeySystemConfiguration&) const final;
> bool supportsConfigurationWithRestrictions(const MediaKeySystemConfiguration&, const MediaKeysRestrictions&) const final;
> bool supportsSessionTypeWithConfiguration(MediaKeySessionType&, const MediaKeySystemConfiguration&) const final;
>@@ -120,7 +120,7 @@ private:
> void loadAndInitialize() final;
> bool supportsServerCertificates() const final;
> bool supportsSessions() const final;
>- bool supportsInitData(const AtomicString&, const SharedBuffer&) const final;
>+ bool supportsInitData(const AtomString&, const SharedBuffer&) const final;
> RefPtr<SharedBuffer> sanitizeResponse(const SharedBuffer&) const final;
> Optional<String> sanitizeSessionId(const String&) const final;
> 
>@@ -155,7 +155,7 @@ public:
> MockCDMInstanceSession(WeakPtr<MockCDMInstance>&&);
> 
> private:
>- void requestLicense(LicenseType, const AtomicString& initDataType, Ref<SharedBuffer>&& initData, LicenseCallback&&) final;
>+ void requestLicense(LicenseType, const AtomString& initDataType, Ref<SharedBuffer>&& initData, LicenseCallback&&) final;
> void updateLicense(const String&, LicenseType, const SharedBuffer&, LicenseUpdateCallback&&) final;
> void loadSession(LicenseType, const String&, const String&, LoadSessionCallback&&) final;
> void closeSession(const String&, CloseSessionCallback&&) final;
>diff --git a/Source/WebCore/workers/Worker.h b/Source/WebCore/workers/Worker.h
>index df192526ce8ff327a746413270789ebfb4f9840b..23c31a0084081ad9a0ee2cb082ef1185fae84954 100644
>--- a/Source/WebCore/workers/Worker.h
>+++ b/Source/WebCore/workers/Worker.h
>@@ -34,7 +34,7 @@
> #include <JavaScriptCore/RuntimeFlags.h>
> #include <wtf/MonotonicTime.h>
> #include <wtf/Optional.h>
>-#include <wtf/text/AtomicStringHash.h>
>+#include <wtf/text/AtomStringHash.h>
> 
> namespace JSC {
> class ExecState;
>diff --git a/Source/WebCore/workers/service/ExtendableEvent.cpp b/Source/WebCore/workers/service/ExtendableEvent.cpp
>index 79679f9a0c3602c30b9b35399ac79ff65bdfd973..4c1bc6f839229a7f733fdf593af52d47a9e018ed 100644
>--- a/Source/WebCore/workers/service/ExtendableEvent.cpp
>+++ b/Source/WebCore/workers/service/ExtendableEvent.cpp
>@@ -34,12 +34,12 @@
> 
> namespace WebCore {
> 
>-ExtendableEvent::ExtendableEvent(const AtomicString& type, const ExtendableEventInit& initializer, IsTrusted isTrusted)
>+ExtendableEvent::ExtendableEvent(const AtomString& type, const ExtendableEventInit& initializer, IsTrusted isTrusted)
> : Event(type, initializer, isTrusted)
> {
> }
> 
>-ExtendableEvent::ExtendableEvent(const AtomicString& type, CanBubble canBubble, IsCancelable cancelable)
>+ExtendableEvent::ExtendableEvent(const AtomString& type, CanBubble canBubble, IsCancelable cancelable)
> : Event(type, canBubble, cancelable)
> {
> }
>diff --git a/Source/WebCore/workers/service/ExtendableEvent.h b/Source/WebCore/workers/service/ExtendableEvent.h
>index baaf13ee60dea90d60c8b1c6e60a48757c45c785..2563c8d7c33bf11ba7a53d292bc3a5d28be57df6 100644
>--- a/Source/WebCore/workers/service/ExtendableEvent.h
>+++ b/Source/WebCore/workers/service/ExtendableEvent.h
>@@ -37,7 +37,7 @@ class DOMPromise;
> 
> class ExtendableEvent : public Event, public CanMakeWeakPtr<ExtendableEvent> {
> public:
>- static Ref<ExtendableEvent> create(const AtomicString& type, const ExtendableEventInit& initializer, IsTrusted isTrusted = IsTrusted::No)
>+ static Ref<ExtendableEvent> create(const AtomString& type, const ExtendableEventInit& initializer, IsTrusted isTrusted = IsTrusted::No)
> {
> return adoptRef(*new ExtendableEvent(type, initializer, isTrusted));
> }
>@@ -52,8 +52,8 @@ public:
> WEBCORE_EXPORT void whenAllExtendLifetimePromisesAreSettled(WTF::Function<void(HashSet<Ref<DOMPromise>>&&)>&&);
> 
> protected:
>- WEBCORE_EXPORT ExtendableEvent(const AtomicString&, const ExtendableEventInit&, IsTrusted);
>- ExtendableEvent(const AtomicString&, CanBubble, IsCancelable);
>+ WEBCORE_EXPORT ExtendableEvent(const AtomString&, const ExtendableEventInit&, IsTrusted);
>+ ExtendableEvent(const AtomString&, CanBubble, IsCancelable);
> 
> void addExtendLifetimePromise(Ref<DOMPromise>&&);
> 
>diff --git a/Source/WebCore/workers/service/ExtendableMessageEvent.cpp b/Source/WebCore/workers/service/ExtendableMessageEvent.cpp
>index 7b05fffc03114f7712323aa300927c7a77e4711f..3dcabcb80c7364dd27852a47e3496dc58bfee2f5 100644
>--- a/Source/WebCore/workers/service/ExtendableMessageEvent.cpp
>+++ b/Source/WebCore/workers/service/ExtendableMessageEvent.cpp
>@@ -37,7 +37,7 @@ Ref<ExtendableMessageEvent> ExtendableMessageEvent::create(Vector<RefPtr<Message
> return adoptRef(*new ExtendableMessageEvent(WTFMove(data), origin, lastEventId, WTFMove(source), WTFMove(ports)));
> }
> 
>-ExtendableMessageEvent::ExtendableMessageEvent(JSC::ExecState& state, const AtomicString& type, const Init& init, IsTrusted isTrusted)
>+ExtendableMessageEvent::ExtendableMessageEvent(JSC::ExecState& state, const AtomString& type, const Init& init, IsTrusted isTrusted)
> : ExtendableEvent(type, init, isTrusted)
> , m_data(SerializedScriptValue::create(state, init.data, SerializationErrorMode::NonThrowing))
> , m_origin(init.origin)
>diff --git a/Source/WebCore/workers/service/ExtendableMessageEvent.h b/Source/WebCore/workers/service/ExtendableMessageEvent.h
>index 4a01a79d27fc77c761f29a8b1df0351f544112f5..34323c8b535ab1e66c869dac44abe85a3f8e67a1 100644
>--- a/Source/WebCore/workers/service/ExtendableMessageEvent.h
>+++ b/Source/WebCore/workers/service/ExtendableMessageEvent.h
>@@ -57,7 +57,7 @@ public:
> Vector<RefPtr<MessagePort>> ports;
> };
> 
>- static Ref<ExtendableMessageEvent> create(JSC::ExecState& state, const AtomicString& type, const Init& initializer, IsTrusted isTrusted = IsTrusted::No)
>+ static Ref<ExtendableMessageEvent> create(JSC::ExecState& state, const AtomString& type, const Init& initializer, IsTrusted isTrusted = IsTrusted::No)
> {
> return adoptRef(*new ExtendableMessageEvent(state, type, initializer, isTrusted));
> }
>@@ -75,7 +75,7 @@ public:
> EventInterface eventInterface() const final { return ExtendableMessageEventInterfaceType; }
> 
> private:
>- ExtendableMessageEvent(JSC::ExecState&, const AtomicString&, const Init&, IsTrusted);
>+ ExtendableMessageEvent(JSC::ExecState&, const AtomString&, const Init&, IsTrusted);
> ExtendableMessageEvent(RefPtr<SerializedScriptValue>&& data, const String& origin, const String& lastEventId, Optional<ExtendableMessageEventSource>&&, Vector<RefPtr<MessagePort>>&&);
> 
> RefPtr<SerializedScriptValue> m_data;
>diff --git a/Source/WebCore/workers/service/FetchEvent.cpp b/Source/WebCore/workers/service/FetchEvent.cpp
>index 7767ac7aabc4fbf6c705ae3e7c0c68eeae797107..1bfe66cb95fb543c2c644061cb19816bc7ba2d11 100644
>--- a/Source/WebCore/workers/service/FetchEvent.cpp
>+++ b/Source/WebCore/workers/service/FetchEvent.cpp
>@@ -40,7 +40,7 @@ Ref<FetchEvent> FetchEvent::createForTesting(ScriptExecutionContext& context)
> return FetchEvent::create("fetch", WTFMove(init), Event::IsTrusted::Yes);
> }
> 
>-FetchEvent::FetchEvent(const AtomicString& type, Init&& initializer, IsTrusted isTrusted)
>+FetchEvent::FetchEvent(const AtomString& type, Init&& initializer, IsTrusted isTrusted)
> : ExtendableEvent(type, initializer, isTrusted)
> , m_request(initializer.request.releaseNonNull())
> , m_clientId(WTFMove(initializer.clientId))
>diff --git a/Source/WebCore/workers/service/FetchEvent.h b/Source/WebCore/workers/service/FetchEvent.h
>index f570b8a0dd4bc386b7b663906740a4a64b42c2f6..e588648efa3e669854614da2249ba5589e51a13c 100644
>--- a/Source/WebCore/workers/service/FetchEvent.h
>+++ b/Source/WebCore/workers/service/FetchEvent.h
>@@ -48,7 +48,7 @@ public:
> 
> WEBCORE_EXPORT static Ref<FetchEvent> createForTesting(ScriptExecutionContext&);
> 
>- static Ref<FetchEvent> create(const AtomicString& type, Init&& initializer, IsTrusted isTrusted = IsTrusted::No)
>+ static Ref<FetchEvent> create(const AtomString& type, Init&& initializer, IsTrusted isTrusted = IsTrusted::No)
> {
> return adoptRef(*new FetchEvent(type, WTFMove(initializer), isTrusted));
> }
>@@ -71,7 +71,7 @@ public:
> static ResourceError createResponseError(const URL&, const String&);
> 
> private:
>- WEBCORE_EXPORT FetchEvent(const AtomicString&, Init&&, IsTrusted);
>+ WEBCORE_EXPORT FetchEvent(const AtomString&, Init&&, IsTrusted);
> 
> void promiseIsSettled();
> void processResponse(Expected<Ref<FetchResponse>, ResourceError>&&);
>diff --git a/Source/WebCore/workers/service/context/ServiceWorkerThread.cpp b/Source/WebCore/workers/service/context/ServiceWorkerThread.cpp
>index f277ea3132a170f7a66b2b4d473e5700460a0b24..08660670a38fcbcbb2728027720a71cd69a84226 100644
>--- a/Source/WebCore/workers/service/context/ServiceWorkerThread.cpp
>+++ b/Source/WebCore/workers/service/context/ServiceWorkerThread.cpp
>@@ -77,7 +77,7 @@ ServiceWorkerThread::ServiceWorkerThread(const ServiceWorkerContextData& data, P
> , m_data(data.isolatedCopy())
> , m_workerObjectProxy(DummyServiceWorkerThreadProxy::shared())
> {
>- AtomicString::init();
>+ AtomString::init();
> }
> 
> ServiceWorkerThread::~ServiceWorkerThread() = default;
>diff --git a/Source/WebCore/worklets/PaintWorkletGlobalScope.cpp b/Source/WebCore/worklets/PaintWorkletGlobalScope.cpp
>index 9aeab97ac54dd1b56c0cef05577d0bdc3a54f856..2b7a2fe3fbb58d4c4ee38fc04b536a3e4e0c77e7 100644
>--- a/Source/WebCore/worklets/PaintWorkletGlobalScope.cpp
>+++ b/Source/WebCore/worklets/PaintWorkletGlobalScope.cpp
>@@ -59,7 +59,7 @@ double PaintWorkletGlobalScope::devicePixelRatio() const
> return responsibleDocument()->domWindow()->devicePixelRatio();
> }
> 
>-PaintWorkletGlobalScope::PaintDefinition::PaintDefinition(const AtomicString& name, JSC::JSObject* paintConstructor, Ref<CSSPaintCallback>&& paintCallback, Vector<String>&& inputProperties, Vector<String>&& inputArguments)
>+PaintWorkletGlobalScope::PaintDefinition::PaintDefinition(const AtomString& name, JSC::JSObject* paintConstructor, Ref<CSSPaintCallback>&& paintCallback, Vector<String>&& inputProperties, Vector<String>&& inputArguments)
> : name(name)
> , paintConstructor(paintConstructor)
> , paintCallback(WTFMove(paintCallback))
>diff --git a/Source/WebCore/worklets/PaintWorkletGlobalScope.h b/Source/WebCore/worklets/PaintWorkletGlobalScope.h
>index fe0eb4c5f652db3c02759fbd97a21bfaabbe0074..96cf1850b0cae3aae9607db134167358b671c1d9 100644
>--- a/Source/WebCore/worklets/PaintWorkletGlobalScope.h
>+++ b/Source/WebCore/worklets/PaintWorkletGlobalScope.h
>@@ -49,9 +49,9 @@ public:
> 
> // All paint definitions must be destroyed before the vm is destroyed, because otherwise they will point to freed memory.
> struct PaintDefinition : public CanMakeWeakPtr<PaintDefinition> {
>- PaintDefinition(const AtomicString& name, JSC::JSObject* paintConstructor, Ref<CSSPaintCallback>&&, Vector<String>&& inputProperties, Vector<String>&& inputArguments);
>+ PaintDefinition(const AtomString& name, JSC::JSObject* paintConstructor, Ref<CSSPaintCallback>&&, Vector<String>&& inputProperties, Vector<String>&& inputArguments);
> 
>- const AtomicString name;
>+ const AtomString name;
> const JSC::JSObject* const paintConstructor;
> const Ref<CSSPaintCallback> paintCallback;
> const Vector<String> inputProperties;
>diff --git a/Source/WebCore/xml/XMLHttpRequest.cpp b/Source/WebCore/xml/XMLHttpRequest.cpp
>index 2cbfbfb0e66f0d085c313d689551f3decf9e77eb..5c6474ff47f6d02adcbda29ecad564f4b46b3028 100644
>--- a/Source/WebCore/xml/XMLHttpRequest.cpp
>+++ b/Source/WebCore/xml/XMLHttpRequest.cpp
>@@ -1079,7 +1079,7 @@ void XMLHttpRequest::dispatchEvent(Event& event)
> EventTarget::dispatchEvent(event);
> }
> 
>-void XMLHttpRequest::dispatchErrorEvents(const AtomicString& type)
>+void XMLHttpRequest::dispatchErrorEvents(const AtomString& type)
> {
> if (!m_uploadComplete) {
> m_uploadComplete = true;
>diff --git a/Source/WebCore/xml/XMLHttpRequest.h b/Source/WebCore/xml/XMLHttpRequest.h
>index 13c86c88212d1699fef3d45e8505ff8f72b99630..d70d3e9c5d489b213e6af97351e4d62b8ff06934 100644
>--- a/Source/WebCore/xml/XMLHttpRequest.h
>+++ b/Source/WebCore/xml/XMLHttpRequest.h
>@@ -184,7 +184,7 @@ private:
> void networkError();
> void abortError();
> 
>- void dispatchErrorEvents(const AtomicString&);
>+ void dispatchErrorEvents(const AtomString&);
> 
> using EventTarget::dispatchEvent;
> void dispatchEvent(Event&) override;
>diff --git a/Source/WebCore/xml/XMLHttpRequestProgressEvent.h b/Source/WebCore/xml/XMLHttpRequestProgressEvent.h
>index c0aeddd2dde129435094b52a0153a752209bef8a..85f807c9e0574d2528a1241f388714a8e9117d1f 100644
>--- a/Source/WebCore/xml/XMLHttpRequestProgressEvent.h
>+++ b/Source/WebCore/xml/XMLHttpRequestProgressEvent.h
>@@ -32,7 +32,7 @@ namespace WebCore {
> 
> class XMLHttpRequestProgressEvent : public ProgressEvent {
> public:
>- static Ref<XMLHttpRequestProgressEvent> create(const AtomicString& type, bool lengthComputable = false, unsigned long long loaded = 0, unsigned long long total = 0)
>+ static Ref<XMLHttpRequestProgressEvent> create(const AtomString& type, bool lengthComputable = false, unsigned long long loaded = 0, unsigned long long total = 0)
> {
> return adoptRef(*new XMLHttpRequestProgressEvent(type, lengthComputable, loaded, total));
> }
>@@ -43,7 +43,7 @@ public:
> EventInterface eventInterface() const override { return XMLHttpRequestProgressEventInterfaceType; }
> 
> private:
>- XMLHttpRequestProgressEvent(const AtomicString& type, bool lengthComputable, unsigned long long loaded, unsigned long long total)
>+ XMLHttpRequestProgressEvent(const AtomString& type, bool lengthComputable, unsigned long long loaded, unsigned long long total)
> : ProgressEvent(type, lengthComputable, loaded, total)
> {
> }
>diff --git a/Source/WebCore/xml/XMLHttpRequestProgressEventThrottle.cpp b/Source/WebCore/xml/XMLHttpRequestProgressEventThrottle.cpp
>index 4a19c479c763c77c36d902fa4eb92fe8006fc169..f8f9f5ee70b2717e88ac5ab0b6e0bba85c85d986 100644
>--- a/Source/WebCore/xml/XMLHttpRequestProgressEventThrottle.cpp
>+++ b/Source/WebCore/xml/XMLHttpRequestProgressEventThrottle.cpp
>@@ -95,7 +95,7 @@ void XMLHttpRequestProgressEventThrottle::dispatchEvent(Event& event)
> m_target->dispatchEvent(event);
> }
> 
>-void XMLHttpRequestProgressEventThrottle::dispatchProgressEvent(const AtomicString& type)
>+void XMLHttpRequestProgressEventThrottle::dispatchProgressEvent(const AtomString& type)
> {
> ASSERT(type == eventNames().loadstartEvent || type == eventNames().progressEvent || type == eventNames().loadEvent || type == eventNames().loadendEvent || type == eventNames().abortEvent || type == eventNames().errorEvent || type == eventNames().timeoutEvent);
> 
>diff --git a/Source/WebCore/xml/XMLHttpRequestProgressEventThrottle.h b/Source/WebCore/xml/XMLHttpRequestProgressEventThrottle.h
>index 553f10398a4c0799d868f651bfc06a49a6d22097..195316c4287f6c0d6ce9d3fb9567a6742532f7ff 100644
>--- a/Source/WebCore/xml/XMLHttpRequestProgressEventThrottle.h
>+++ b/Source/WebCore/xml/XMLHttpRequestProgressEventThrottle.h
>@@ -49,7 +49,7 @@ public:
> 
> void dispatchThrottledProgressEvent(bool lengthComputable, unsigned long long loaded, unsigned long long total);
> void dispatchReadyStateChangeEvent(Event&, ProgressEventAction = DoNotFlushProgressEvent);
>- void dispatchProgressEvent(const AtomicString&);
>+ void dispatchProgressEvent(const AtomString&);
> 
> void suspend();
> void resume();
>diff --git a/Source/WebCore/xml/XMLHttpRequestUpload.cpp b/Source/WebCore/xml/XMLHttpRequestUpload.cpp
>index e92a49f2f51407b4e549f4beaa268f742cbcd6e3..929a34cb76e00cb5130a1f18ae2492151331be71 100644
>--- a/Source/WebCore/xml/XMLHttpRequestUpload.cpp
>+++ b/Source/WebCore/xml/XMLHttpRequestUpload.cpp
>@@ -30,7 +30,7 @@
> #include "XMLHttpRequestProgressEvent.h"
> #include <wtf/Assertions.h>
> #include <wtf/IsoMallocInlines.h>
>-#include <wtf/text/AtomicString.h>
>+#include <wtf/text/AtomString.h>
> 
> namespace WebCore {
> 
>@@ -41,7 +41,7 @@ XMLHttpRequestUpload::XMLHttpRequestUpload(XMLHttpRequest& request)
> {
> }
> 
>-void XMLHttpRequestUpload::dispatchProgressEvent(const AtomicString& type, unsigned long long loaded, unsigned long long total)
>+void XMLHttpRequestUpload::dispatchProgressEvent(const AtomString& type, unsigned long long loaded, unsigned long long total)
> {
> ASSERT(type == eventNames().loadstartEvent || type == eventNames().progressEvent || type == eventNames().loadEvent || type == eventNames().loadendEvent || type == eventNames().abortEvent || type == eventNames().errorEvent || type == eventNames().timeoutEvent);
> 
>diff --git a/Source/WebCore/xml/XMLHttpRequestUpload.h b/Source/WebCore/xml/XMLHttpRequestUpload.h
>index d399fdb7f3bbe8b1deb327959b85511d623a6dd8..d099d2ba2b44a11ca6e48bf29287e9199879edc7 100644
>--- a/Source/WebCore/xml/XMLHttpRequestUpload.h
>+++ b/Source/WebCore/xml/XMLHttpRequestUpload.h
>@@ -38,7 +38,7 @@ public:
> void ref() { m_request.ref(); }
> void deref() { m_request.deref(); }
> 
>- void dispatchProgressEvent(const AtomicString& type, unsigned long long loaded, unsigned long long total);
>+ void dispatchProgressEvent(const AtomString& type, unsigned long long loaded, unsigned long long total);
> 
> private:
> void refEventTarget() final { ref(); }
>diff --git a/Source/WebCore/xml/XMLTreeViewer.cpp b/Source/WebCore/xml/XMLTreeViewer.cpp
>index 93deb8e6d3c4448e1dabe0c7ee2a403002a5e1c3..fe01cc1ff491c367fcad97bfd4d6c4e730f6bda8 100644
>--- a/Source/WebCore/xml/XMLTreeViewer.cpp
>+++ b/Source/WebCore/xml/XMLTreeViewer.cpp
>@@ -57,7 +57,7 @@ void XMLTreeViewer::transformDocumentToTreeView()
> 
> String scriptString = StringImpl::createWithoutCopying(XMLViewer_js, sizeof(XMLViewer_js));
> m_document.frame()->script().evaluate(ScriptSourceCode(scriptString));
>- m_document.frame()->script().evaluate(ScriptSourceCode(AtomicString("prepareWebKitXMLViewer('This XML file does not appear to have any style information associated with it. The document tree is shown below.');")));
>+ m_document.frame()->script().evaluate(ScriptSourceCode(AtomString("prepareWebKitXMLViewer('This XML file does not appear to have any style information associated with it. The document tree is shown below.');")));
> 
> String cssString = StringImpl::createWithoutCopying(XMLViewer_css, sizeof(XMLViewer_css));
> auto text = m_document.createTextNode(cssString);
>diff --git a/Source/WebCore/xml/XPathFunctions.cpp b/Source/WebCore/xml/XPathFunctions.cpp
>index 73534a474f5b1b47639a2cab7cd35d8bac17cc7c..ad7e13c8a194ad56d6234200017cba77fe80b742 100644
>--- a/Source/WebCore/xml/XPathFunctions.cpp
>+++ b/Source/WebCore/xml/XPathFunctions.cpp
>@@ -304,13 +304,13 @@ Value FunPosition::evaluate() const
> return Expression::evaluationContext().position;
> }
> 
>-static AtomicString atomicSubstring(StringBuilder& builder, unsigned start, unsigned length)
>+static AtomString atomicSubstring(StringBuilder& builder, unsigned start, unsigned length)
> {
> ASSERT(start <= builder.length());
> ASSERT(length <= builder.length() - start);
> if (builder.is8Bit())
>- return AtomicString(builder.characters8() + start, length);
>- return AtomicString(builder.characters16() + start, length);
>+ return AtomString(builder.characters8() + start, length);
>+ return AtomString(builder.characters16() + start, length);
> }
> 
> Value FunId::evaluate() const
>@@ -367,7 +367,7 @@ static inline String expandedNameLocalPart(Node* node)
> 
> static inline String expandedName(Node* node)
> {
>- const AtomicString& prefix = node->prefix();
>+ const AtomString& prefix = node->prefix();
> return prefix.isEmpty() ? expandedNameLocalPart(node) : prefix + ":" + expandedNameLocalPart(node);
> }
> 
>diff --git a/Source/WebCore/xml/XPathStep.cpp b/Source/WebCore/xml/XPathStep.cpp
>index 4b55917a371b6aa6c24f2d350fce997d0ed9e9f5..4003cf27a889e2f5745522583c83a4e134885f06 100644
>--- a/Source/WebCore/xml/XPathStep.cpp
>+++ b/Source/WebCore/xml/XPathStep.cpp
>@@ -165,14 +165,14 @@ inline bool nodeMatchesBasicTest(Node& node, Step::Axis axis, const Step::NodeTe
> case Step::NodeTest::CommentNodeTest:
> return node.nodeType() == Node::COMMENT_NODE;
> case Step::NodeTest::ProcessingInstructionNodeTest: {
>- const AtomicString& name = nodeTest.m_data;
>+ const AtomString& name = nodeTest.m_data;
> return node.nodeType() == Node::PROCESSING_INSTRUCTION_NODE && (name.isEmpty() || node.nodeName() == name);
> }
> case Step::NodeTest::AnyNodeTest:
> return true;
> case Step::NodeTest::NameTest: {
>- const AtomicString& name = nodeTest.m_data;
>- const AtomicString& namespaceURI = nodeTest.m_namespaceURI;
>+ const AtomString& name = nodeTest.m_data;
>+ const AtomString& namespaceURI = nodeTest.m_namespaceURI;
> 
> if (axis == Step::AttributeAxis) {
> ASSERT(node.isAttributeNode());
>diff --git a/Source/WebCore/xml/XPathStep.h b/Source/WebCore/xml/XPathStep.h
>index 0e5fd629cda2d70cf499322f9e290714baa256b6..fbfd92e118ff84bf851224603c5fb4660b8ceb10 100644
>--- a/Source/WebCore/xml/XPathStep.h
>+++ b/Source/WebCore/xml/XPathStep.h
>@@ -27,7 +27,7 @@
> #pragma once
> 
> #include <wtf/Vector.h>
>-#include <wtf/text/AtomicString.h>
>+#include <wtf/text/AtomString.h>
> 
> namespace WebCore {
> 
>@@ -55,8 +55,8 @@ public:
> enum Kind { TextNodeTest, CommentNodeTest, ProcessingInstructionNodeTest, AnyNodeTest, NameTest };
> 
> explicit NodeTest(Kind kind) : m_kind(kind) { }
>- NodeTest(Kind kind, const AtomicString& data) : m_kind(kind), m_data(data) { }
>- NodeTest(Kind kind, const AtomicString& data, const AtomicString& namespaceURI) : m_kind(kind), m_data(data), m_namespaceURI(namespaceURI) { }
>+ NodeTest(Kind kind, const AtomString& data) : m_kind(kind), m_data(data) { }
>+ NodeTest(Kind kind, const AtomString& data, const AtomString& namespaceURI) : m_kind(kind), m_data(data), m_namespaceURI(namespaceURI) { }
> 
> private:
> friend class Step;
>@@ -65,8 +65,8 @@ public:
> friend bool nodeMatches(Node&, Axis, const NodeTest&);
> 
> Kind m_kind;
>- AtomicString m_data;
>- AtomicString m_namespaceURI;
>+ AtomString m_data;
>+ AtomString m_namespaceURI;
> Vector<std::unique_ptr<Expression>> m_mergedPredicates;
> };
> 
>diff --git a/Source/WebCore/xml/parser/XMLDocumentParser.h b/Source/WebCore/xml/parser/XMLDocumentParser.h
>index e822c23a0dc8e4c36e30cf3c5b0c76590940f49f..b3d9d93a7ea240e5c546e51cbab03297d3d92fe2 100644
>--- a/Source/WebCore/xml/parser/XMLDocumentParser.h
>+++ b/Source/WebCore/xml/parser/XMLDocumentParser.h
>@@ -32,7 +32,7 @@
> #include <libxml/tree.h>
> #include <libxml/xmlstring.h>
> #include <wtf/HashMap.h>
>-#include <wtf/text/AtomicStringHash.h>
>+#include <wtf/text/AtomStringHash.h>
> #include <wtf/text/CString.h>
> 
> namespace WebCore {
>@@ -180,9 +180,9 @@ private:
> TextPosition m_scriptStartPosition;
> 
> bool m_parsingFragment { false };
>- AtomicString m_defaultNamespaceURI;
>+ AtomString m_defaultNamespaceURI;
> 
>- HashMap<AtomicString, AtomicString> m_prefixToNamespaceMap;
>+ HashMap<AtomString, AtomString> m_prefixToNamespaceMap;
> SegmentedString m_pendingSrc;
> };
> 
>diff --git a/Source/WebCore/xml/parser/XMLDocumentParserLibxml2.cpp b/Source/WebCore/xml/parser/XMLDocumentParserLibxml2.cpp
>index 9dc2cb0963836f0c4aaf8d19c3a13e3d68d81a1a..b93101b8aac4839a39bb54b2b89de898c79b75ab 100644
>--- a/Source/WebCore/xml/parser/XMLDocumentParserLibxml2.cpp
>+++ b/Source/WebCore/xml/parser/XMLDocumentParserLibxml2.cpp
>@@ -673,14 +673,14 @@ static inline String toString(const xmlChar* string)
> return String::fromUTF8(reinterpret_cast<const char*>(string));
> }
> 
>-static inline AtomicString toAtomicString(const xmlChar* string, size_t size)
>+static inline AtomString toAtomString(const xmlChar* string, size_t size)
> {
>- return AtomicString::fromUTF8(reinterpret_cast<const char*>(string), size);
>+ return AtomString::fromUTF8(reinterpret_cast<const char*>(string), size);
> }
> 
>-static inline AtomicString toAtomicString(const xmlChar* string)
>+static inline AtomString toAtomString(const xmlChar* string)
> {
>- return AtomicString::fromUTF8(reinterpret_cast<const char*>(string));
>+ return AtomString::fromUTF8(reinterpret_cast<const char*>(string));
> }
> 
> struct _xmlSAX2Namespace {
>@@ -693,8 +693,8 @@ static inline bool handleNamespaceAttributes(Vector<Attribute>& prefixedAttribut
> {
> xmlSAX2Namespace* namespaces = reinterpret_cast<xmlSAX2Namespace*>(libxmlNamespaces);
> for (int i = 0; i < numNamespaces; i++) {
>- AtomicString namespaceQName = xmlnsAtom();
>- AtomicString namespaceURI = toAtomicString(namespaces[i].uri);
>+ AtomString namespaceQName = xmlnsAtom();
>+ AtomString namespaceURI = toAtomString(namespaces[i].uri);
> if (namespaces[i].prefix)
> namespaceQName = "xmlns:" + toString(namespaces[i].prefix);
> 
>@@ -721,10 +721,10 @@ static inline bool handleElementAttributes(Vector<Attribute>& prefixedAttributes
> xmlSAX2Attributes* attributes = reinterpret_cast<xmlSAX2Attributes*>(libxmlAttributes);
> for (int i = 0; i < numAttributes; i++) {
> int valueLength = static_cast<int>(attributes[i].end - attributes[i].value);
>- AtomicString attrValue = toAtomicString(attributes[i].value, valueLength);
>+ AtomString attrValue = toAtomString(attributes[i].value, valueLength);
> String attrPrefix = toString(attributes[i].prefix);
>- AtomicString attrURI = attrPrefix.isEmpty() ? nullAtom() : toAtomicString(attributes[i].uri);
>- AtomicString attrQName = attrPrefix.isEmpty() ? toAtomicString(attributes[i].localname) : attrPrefix + ":" + toString(attributes[i].localname);
>+ AtomString attrURI = attrPrefix.isEmpty() ? nullAtom() : toAtomString(attributes[i].uri);
>+ AtomString attrQName = attrPrefix.isEmpty() ? toAtomString(attributes[i].localname) : attrPrefix + ":" + toString(attributes[i].localname);
> 
> auto result = Element::parseAttributeName(attrURI, attrQName);
> if (result.hasException())
>@@ -761,9 +761,9 @@ void XMLDocumentParser::startElementNs(const xmlChar* xmlLocalName, const xmlCha
> if (!updateLeafTextNode())
> return;
> 
>- AtomicString localName = toAtomicString(xmlLocalName);
>- AtomicString uri = toAtomicString(xmlURI);
>- AtomicString prefix = toAtomicString(xmlPrefix);
>+ AtomString localName = toAtomString(xmlLocalName);
>+ AtomString uri = toAtomString(xmlURI);
>+ AtomString prefix = toAtomString(xmlPrefix);
> 
> if (m_parsingFragment && uri.isNull()) {
> if (!prefix.isNull())
>diff --git a/Source/WebKit/NetworkProcess/NetworkProcess.cpp b/Source/WebKit/NetworkProcess/NetworkProcess.cpp
>index dd9a1e3a8c5d76d2dd435303b7b8365ccae092e2..f25e7e602d0964652e681f53ab1ef9b4797bf2ef 100644
>--- a/Source/WebKit/NetworkProcess/NetworkProcess.cpp
>+++ b/Source/WebKit/NetworkProcess/NetworkProcess.cpp
>@@ -85,7 +85,7 @@
> #include <wtf/OptionSet.h>
> #include <wtf/ProcessPrivilege.h>
> #include <wtf/RunLoop.h>
>-#include <wtf/text/AtomicString.h>
>+#include <wtf/text/AtomString.h>
> 
> #if ENABLE(SEC_ITEM_SHIM)
> #include "SecItemShim.h"
>@@ -288,7 +288,7 @@ void NetworkProcess::initializeNetworkProcess(NetworkProcessCreationParameters&&
> platformInitializeNetworkProcess(parameters);
> 
> WTF::Thread::setCurrentThreadIsUserInitiated();
>- AtomicString::init();
>+ AtomString::init();
> 
> m_suppressMemoryPressureHandler = parameters.shouldSuppressMemoryPressureHandler;
> if (!m_suppressMemoryPressureHandler) {
>diff --git a/Source/WebKit/NetworkProcess/cache/NetworkCache.cpp b/Source/WebKit/NetworkProcess/cache/NetworkCache.cpp
>index e5e68138ff55efd12743b5fbd66a046ff34ba20b..1310931b4b0af70d8f65ad774d2f4d9abd4701f3 100644
>--- a/Source/WebKit/NetworkProcess/cache/NetworkCache.cpp
>+++ b/Source/WebKit/NetworkProcess/cache/NetworkCache.cpp
>@@ -52,10 +52,10 @@ namespace NetworkCache {
> 
> using namespace FileSystem;
> 
>-static const AtomicString& resourceType()
>+static const AtomString& resourceType()
> {
> ASSERT(WTF::RunLoop::isMain());
>- static NeverDestroyed<const AtomicString> resource("Resource", AtomicString::ConstructFromLiteral);
>+ static NeverDestroyed<const AtomString> resource("Resource", AtomString::ConstructFromLiteral);
> return resource;
> }
> 
>diff --git a/Source/WebKit/NetworkProcess/cache/NetworkCacheSpeculativeLoadManager.cpp b/Source/WebKit/NetworkProcess/cache/NetworkCacheSpeculativeLoadManager.cpp
>index 40ccc5e0c6fa949e36dcab66598f2684b9c6dee8..62f7de5a07ec1f529a6aa3949cbc30be9f6bd610 100644
>--- a/Source/WebKit/NetworkProcess/cache/NetworkCacheSpeculativeLoadManager.cpp
>+++ b/Source/WebKit/NetworkProcess/cache/NetworkCacheSpeculativeLoadManager.cpp
>@@ -73,10 +73,10 @@ static void logSpeculativeLoadingDiagnosticMessage(NetworkProcess& networkProces
> networkProcess.logDiagnosticMessage(frameID.first, WebCore::DiagnosticLoggingKeys::networkCacheKey(), message, WebCore::ShouldSample::Yes);
> }
> 
>-static const AtomicString& subresourcesType()
>+static const AtomString& subresourcesType()
> {
> ASSERT(RunLoop::isMain());
>- static NeverDestroyed<const AtomicString> resource("SubResources", AtomicString::ConstructFromLiteral);
>+ static NeverDestroyed<const AtomString> resource("SubResources", AtomString::ConstructFromLiteral);
> return resource;
> }
> 
>diff --git a/Source/WebKit/Platform/IPC/ArgumentCoders.cpp b/Source/WebKit/Platform/IPC/ArgumentCoders.cpp
>index 02bf4dcd70edb411e8c535a3ab138085b68a1792..56e6639b8e836c03cd8500dbb48188b33c6028e4 100644
>--- a/Source/WebKit/Platform/IPC/ArgumentCoders.cpp
>+++ b/Source/WebKit/Platform/IPC/ArgumentCoders.cpp
>@@ -56,18 +56,18 @@ Optional<WallTime> ArgumentCoder<WallTime>::decode(Decoder& decoder)
> return WallTime::fromRawSeconds(*time);
> }
> 
>-void ArgumentCoder<AtomicString>::encode(Encoder& encoder, const AtomicString& atomicString)
>+void ArgumentCoder<AtomString>::encode(Encoder& encoder, const AtomString& atomString)
> {
>- encoder << atomicString.string();
>+ encoder << atomString.string();
> }
> 
>-bool ArgumentCoder<AtomicString>::decode(Decoder& decoder, AtomicString& atomicString)
>+bool ArgumentCoder<AtomString>::decode(Decoder& decoder, AtomString& atomString)
> {
> String string;
> if (!decoder.decode(string))
> return false;
> 
>- atomicString = string;
>+ atomString = string;
> return true;
> }
> 
>diff --git a/Source/WebKit/Platform/IPC/ArgumentCoders.h b/Source/WebKit/Platform/IPC/ArgumentCoders.h
>index efa2db54b10c5abe6b8f77877aacad82b48356b4..aa3fce67cb92748896b314fb4abb302dea57ffc2 100644
>--- a/Source/WebKit/Platform/IPC/ArgumentCoders.h
>+++ b/Source/WebKit/Platform/IPC/ArgumentCoders.h
>@@ -615,9 +615,9 @@ template<> struct ArgumentCoder<WallTime> {
> static Optional<WallTime> decode(Decoder&);
> };
> 
>-template<> struct ArgumentCoder<AtomicString> {
>- static void encode(Encoder&, const AtomicString&);
>- static bool decode(Decoder&, AtomicString&);
>+template<> struct ArgumentCoder<AtomString> {
>+ static void encode(Encoder&, const AtomString&);
>+ static bool decode(Decoder&, AtomString&);
> };
> 
> template<> struct ArgumentCoder<CString> {
>diff --git a/Source/WebKit/UIProcess/API/APIContentRuleListStore.cpp b/Source/WebKit/UIProcess/API/APIContentRuleListStore.cpp
>index 030657c0fae09c612f3274ad8c661f27175bd895..d409da98b7a6b106b850e00a617efe2db99e2879 100644
>--- a/Source/WebKit/UIProcess/API/APIContentRuleListStore.cpp
>+++ b/Source/WebKit/UIProcess/API/APIContentRuleListStore.cpp
>@@ -467,7 +467,7 @@ void ContentRuleListStore::getAvailableContentRuleListIdentifiers(CompletionHand
> 
> void ContentRuleListStore::compileContentRuleList(const WTF::String& identifier, WTF::String&& json, CompletionHandler<void(RefPtr<API::ContentRuleList>, std::error_code)> completionHandler)
> {
>- AtomicString::init();
>+ AtomString::init();
> WebCore::QualifiedName::init();
> 
> auto parsedRules = WebCore::ContentExtensions::parseRuleList(json);
>diff --git a/Source/WebKit/UIProcess/Downloads/DownloadProxy.messages.in b/Source/WebKit/UIProcess/Downloads/DownloadProxy.messages.in
>index ea56dab1d625dceff3b27097ab8512badcd6a79e..3757f8f128a3181aa4b49221f1e39fdb9f28305c 100644
>--- a/Source/WebKit/UIProcess/Downloads/DownloadProxy.messages.in
>+++ b/Source/WebKit/UIProcess/Downloads/DownloadProxy.messages.in
>@@ -21,7 +21,7 @@
> # OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
> 
> messages -> DownloadProxy {
>- DidStart(WebCore::ResourceRequest request, AtomicString suggestedFilename)
>+ DidStart(WebCore::ResourceRequest request, AtomString suggestedFilename)
> DidReceiveAuthenticationChallenge(WebCore::AuthenticationChallenge challenge, uint64_t challengeID)
> WillSendRequest(WebCore::ResourceRequest redirectRequest, WebCore::ResourceResponse redirectResponse))
> DecideDestinationWithSuggestedFilenameAsync(WebKit::DownloadID downloadID, String suggestedFilename)
>diff --git a/Source/WebKit/UIProcess/RemoteLayerTree/RemoteScrollingCoordinatorProxy.cpp b/Source/WebKit/UIProcess/RemoteLayerTree/RemoteScrollingCoordinatorProxy.cpp
>index 3491383a375797a3ffc2b6d96d5e39cbd264d90f..d59d9c1bdf79cdb7339805cda7788832927e548f 100644
>--- a/Source/WebKit/UIProcess/RemoteLayerTree/RemoteScrollingCoordinatorProxy.cpp
>+++ b/Source/WebKit/UIProcess/RemoteLayerTree/RemoteScrollingCoordinatorProxy.cpp
>@@ -182,7 +182,7 @@ void RemoteScrollingCoordinatorProxy::handleMouseEvent(const WebCore::PlatformMo
> m_scrollingTree->handleMouseEvent(event);
> }
> 
>-TrackingType RemoteScrollingCoordinatorProxy::eventTrackingTypeForPoint(const AtomicString& eventName, IntPoint p) const
>+TrackingType RemoteScrollingCoordinatorProxy::eventTrackingTypeForPoint(const AtomString& eventName, IntPoint p) const
> {
> return m_scrollingTree->eventTrackingTypeForPoint(eventName, p);
> }
>diff --git a/Source/WebKit/UIProcess/RemoteLayerTree/RemoteScrollingCoordinatorProxy.h b/Source/WebKit/UIProcess/RemoteLayerTree/RemoteScrollingCoordinatorProxy.h
>index 35c2ff107fc70b09647f4984d0d5a8d371f1b91d..72a8eac2f7f661d2317c0c5105f39d423a04e3df 100644
>--- a/Source/WebKit/UIProcess/RemoteLayerTree/RemoteScrollingCoordinatorProxy.h
>+++ b/Source/WebKit/UIProcess/RemoteLayerTree/RemoteScrollingCoordinatorProxy.h
>@@ -56,7 +56,7 @@ public:
> void scrollingTreeNodeDidScroll(WebCore::ScrollingNodeID, const WebCore::FloatPoint& newScrollPosition, const Optional<WebCore::FloatPoint>& layoutViewportOrigin, WebCore::ScrollingLayerPositionAction);
> void scrollingTreeNodeRequestsScroll(WebCore::ScrollingNodeID, const WebCore::FloatPoint& scrollPosition, bool representsProgrammaticScroll);
> 
>- WebCore::TrackingType eventTrackingTypeForPoint(const AtomicString& eventName, WebCore::IntPoint) const;
>+ WebCore::TrackingType eventTrackingTypeForPoint(const AtomString& eventName, WebCore::IntPoint) const;
> 
> // Called externally when native views move around.
> void viewportChangedViaDelegatedScrolling(const WebCore::FloatPoint& scrollPosition, const WebCore::FloatRect& layoutViewport, double scale);
>diff --git a/Source/WebKit/UIProcess/WebPageProxy.cpp b/Source/WebKit/UIProcess/WebPageProxy.cpp
>index 303e74fb73af8abfafda0a4b3b0722ab3c771199..38470e544125baf1684e7e0dd533f607ae429eb7 100644
>--- a/Source/WebKit/UIProcess/WebPageProxy.cpp
>+++ b/Source/WebKit/UIProcess/WebPageProxy.cpp
>@@ -2527,7 +2527,7 @@ void WebPageProxy::updateTouchEventTracking(const WebTouchEvent& touchStartEvent
> const EventNames& names = eventNames();
> for (auto& touchPoint : touchStartEvent.touchPoints()) {
> IntPoint location = touchPoint.location();
>- auto updateTrackingType = [this, location](TrackingType& trackingType, const AtomicString& eventName) {
>+ auto updateTrackingType = [this, location](TrackingType& trackingType, const AtomString& eventName) {
> if (trackingType == TrackingType::Synchronous)
> return;
> 
>diff --git a/Source/WebKit/UIProcess/WebPageProxy.h b/Source/WebKit/UIProcess/WebPageProxy.h
>index f54f67fe486ef1899b1328755cda0788f1cdb3da..93374abbb62d07084cadfebdc20f36e17e5ec255 100644
>--- a/Source/WebKit/UIProcess/WebPageProxy.h
>+++ b/Source/WebKit/UIProcess/WebPageProxy.h
>@@ -1786,7 +1786,7 @@ private:
> #endif
> 
> #if PLATFORM(GTK)
>- void getEditorCommandsForKeyEvent(const AtomicString&, Vector<String>&);
>+ void getEditorCommandsForKeyEvent(const AtomString&, Vector<String>&);
> #endif
> 
> #if USE(ATK)
>diff --git a/Source/WebKit/WebProcess/InjectedBundle/InjectedBundleNavigationAction.h b/Source/WebKit/WebProcess/InjectedBundle/InjectedBundleNavigationAction.h
>index 9481bd8d30dccd7eecfbb0a3a897dd8864ea19d9..8e2d6b1a0e66f4315794aefa7fdd647a40cd07fc 100644
>--- a/Source/WebKit/WebProcess/InjectedBundle/InjectedBundleNavigationAction.h
>+++ b/Source/WebKit/WebProcess/InjectedBundle/InjectedBundleNavigationAction.h
>@@ -62,7 +62,7 @@ public:
> 
> bool shouldOpenExternalURLs() const { return m_shouldOpenExternalURLs; }
> bool shouldTryAppLinks() const { return m_shouldTryAppLinks; }
>- AtomicString downloadAttribute() const { return m_downloadAttribute; }
>+ AtomString downloadAttribute() const { return m_downloadAttribute; }
> 
> private:
> InjectedBundleNavigationAction(WebFrame*, const WebCore::NavigationAction&, RefPtr<WebCore::FormState>&&);
>@@ -74,7 +74,7 @@ private:
> WebCore::FloatPoint m_clickLocationInRootViewCoordinates;
> RefPtr<InjectedBundleHitTestResult> m_hitTestResult;
> RefPtr<InjectedBundleNodeHandle> m_formElement;
>- AtomicString m_downloadAttribute;
>+ AtomString m_downloadAttribute;
> bool m_shouldOpenExternalURLs;
> bool m_shouldTryAppLinks;
> };
>diff --git a/Source/WebKit/WebProcess/Plugins/PDF/PDFPlugin.mm b/Source/WebKit/WebProcess/Plugins/PDF/PDFPlugin.mm
>index 1588bd0e1c50798804ce1414ff033275f45c9bca..0c22a6b780171935d1d236f321bd4c437b3ad734 100644
>--- a/Source/WebKit/WebProcess/Plugins/PDF/PDFPlugin.mm
>+++ b/Source/WebKit/WebProcess/Plugins/PDF/PDFPlugin.mm
>@@ -632,7 +632,7 @@ inline PDFPlugin::PDFPlugin(WebFrame& frame)
> if (supportsForms()) {
> Document* document = webFrame()->coreFrame()->document();
> m_annotationContainer = document->createElement(divTag, false);
>- m_annotationContainer->setAttributeWithoutSynchronization(idAttr, AtomicString("annotationContainer", AtomicString::ConstructFromLiteral));
>+ m_annotationContainer->setAttributeWithoutSynchronization(idAttr, AtomString("annotationContainer", AtomString::ConstructFromLiteral));
> 
> auto annotationStyleElement = document->createElement(styleTag, false);
> annotationStyleElement->setTextContent(annotationStyle);
>diff --git a/Source/WebKit/WebProcess/Plugins/PDF/PDFPluginAnnotation.mm b/Source/WebKit/WebProcess/Plugins/PDF/PDFPluginAnnotation.mm
>index 86ddbd9559913d1f3fc404948daafe656e3d682f..81342d350f24a735d8964c81fc1508b60722a15b 100644
>--- a/Source/WebKit/WebProcess/Plugins/PDF/PDFPluginAnnotation.mm
>+++ b/Source/WebKit/WebProcess/Plugins/PDF/PDFPluginAnnotation.mm
>@@ -67,8 +67,8 @@ void PDFPluginAnnotation::attach(Element* parent)
> m_parent = parent;
> m_element = createAnnotationElement();
> 
>- m_element->setAttributeWithoutSynchronization(classAttr, AtomicString("annotation", AtomicString::ConstructFromLiteral));
>- m_element->setAttributeWithoutSynchronization(x_apple_pdf_annotationAttr, AtomicString("true", AtomicString::ConstructFromLiteral));
>+ m_element->setAttributeWithoutSynchronization(classAttr, AtomString("annotation", AtomString::ConstructFromLiteral));
>+ m_element->setAttributeWithoutSynchronization(x_apple_pdf_annotationAttr, AtomString("true", AtomString::ConstructFromLiteral));
> m_element->addEventListener(eventNames().changeEvent, *m_eventListener, false);
> m_element->addEventListener(eventNames().blurEvent, *m_eventListener, false);
> 
>diff --git a/Source/WebKit/WebProcess/Plugins/PDF/PDFPluginChoiceAnnotation.mm b/Source/WebKit/WebProcess/Plugins/PDF/PDFPluginChoiceAnnotation.mm
>index d344bcc3fc6603dd798e7648ae31b46f7598294d..073bb95a677e3f10dbd5ca4914525b45a9d7a757 100644
>--- a/Source/WebKit/WebProcess/Plugins/PDF/PDFPluginChoiceAnnotation.mm
>+++ b/Source/WebKit/WebProcess/Plugins/PDF/PDFPluginChoiceAnnotation.mm
>@@ -88,7 +88,7 @@ Ref<Element> PDFPluginChoiceAnnotation::createAnnotationElement()
> choiceOption->setTextContent(choice);
> 
> if (choice == selectedChoice)
>- choiceOption->setAttributeWithoutSynchronization(selectedAttr, AtomicString("selected", AtomicString::ConstructFromLiteral));
>+ choiceOption->setAttributeWithoutSynchronization(selectedAttr, AtomString("selected", AtomString::ConstructFromLiteral));
> 
> styledElement.appendChild(choiceOption);
> }
>diff --git a/Source/WebKit/WebProcess/WebCoreSupport/WebSearchPopupMenu.cpp b/Source/WebKit/WebProcess/WebCoreSupport/WebSearchPopupMenu.cpp
>index 33d4756eda27861ebcdb33d1c9b591ccc5297df5..d3bd438c71cbf641a4a3e5d41131c3edd577ca80 100644
>--- a/Source/WebKit/WebProcess/WebCoreSupport/WebSearchPopupMenu.cpp
>+++ b/Source/WebKit/WebProcess/WebCoreSupport/WebSearchPopupMenu.cpp
>@@ -27,7 +27,7 @@
> #include "WebPage.h"
> #include "WebPageProxyMessages.h"
> #include "WebProcess.h"
>-#include <wtf/text/AtomicString.h>
>+#include <wtf/text/AtomString.h>
> 
> namespace WebKit {
> using namespace WebCore;
>@@ -47,7 +47,7 @@ PopupMenu* WebSearchPopupMenu::popupMenu()
> return m_popup.get();
> }
> 
>-void WebSearchPopupMenu::saveRecentSearches(const AtomicString& name, const Vector<RecentSearch>& searchItems)
>+void WebSearchPopupMenu::saveRecentSearches(const AtomString& name, const Vector<RecentSearch>& searchItems)
> {
> if (name.isEmpty())
> return;
>@@ -59,7 +59,7 @@ void WebSearchPopupMenu::saveRecentSearches(const AtomicString& name, const Vect
> WebProcess::singleton().parentProcessConnection()->send(Messages::WebPageProxy::SaveRecentSearches(name, searchItems), page->pageID());
> }
> 
>-void WebSearchPopupMenu::loadRecentSearches(const AtomicString& name, Vector<RecentSearch>& resultItems)
>+void WebSearchPopupMenu::loadRecentSearches(const AtomString& name, Vector<RecentSearch>& resultItems)
> {
> if (name.isEmpty())
> return;
>diff --git a/Source/WebKit/WebProcess/WebCoreSupport/WebSearchPopupMenu.h b/Source/WebKit/WebProcess/WebCoreSupport/WebSearchPopupMenu.h
>index 4e5b3b66c61352fea9788de6d292908ffdf123a2..580664515b07ec52a5d23644ea54efc2498bbdc4 100644
>--- a/Source/WebKit/WebProcess/WebCoreSupport/WebSearchPopupMenu.h
>+++ b/Source/WebKit/WebProcess/WebCoreSupport/WebSearchPopupMenu.h
>@@ -31,8 +31,8 @@ public:
> static Ref<WebSearchPopupMenu> create(WebPage*, WebCore::PopupMenuClient*);
> 
> WebCore::PopupMenu* popupMenu() override;
>- void saveRecentSearches(const WTF::AtomicString& name, const Vector<WebCore::RecentSearch>&) override;
>- void loadRecentSearches(const WTF::AtomicString& name, Vector<WebCore::RecentSearch>&) override;
>+ void saveRecentSearches(const WTF::AtomString& name, const Vector<WebCore::RecentSearch>&) override;
>+ void loadRecentSearches(const WTF::AtomString& name, Vector<WebCore::RecentSearch>&) override;
> bool enabled() override;
> 
> private:
>diff --git a/Source/WebKit/WebProcess/WebPage/VisitedLinkTableController.cpp b/Source/WebKit/WebProcess/WebPage/VisitedLinkTableController.cpp
>index ae17cb26225879a88f70bb5789dd505051c865cf..bb1306e299f3f778d9e6525e397002a1819a2acc 100644
>--- a/Source/WebKit/WebProcess/WebPage/VisitedLinkTableController.cpp
>+++ b/Source/WebKit/WebProcess/WebPage/VisitedLinkTableController.cpp
>@@ -70,7 +70,7 @@ VisitedLinkTableController::~VisitedLinkTableController()
> visitedLinkTableControllers().remove(m_identifier);
> }
> 
>-bool VisitedLinkTableController::isLinkVisited(Page&, SharedStringHash linkHash, const URL&, const AtomicString&)
>+bool VisitedLinkTableController::isLinkVisited(Page&, SharedStringHash linkHash, const URL&, const AtomString&)
> {
> return m_visitedLinkTable.contains(linkHash);
> }
>diff --git a/Source/WebKit/WebProcess/WebPage/VisitedLinkTableController.h b/Source/WebKit/WebProcess/WebPage/VisitedLinkTableController.h
>index 17fa8ecca78ba8ac27681653a7d2e7fdd70fe273..6726bcaf2cb5b320ee2e74f67f27636af6495186 100644
>--- a/Source/WebKit/WebProcess/WebPage/VisitedLinkTableController.h
>+++ b/Source/WebKit/WebProcess/WebPage/VisitedLinkTableController.h
>@@ -41,7 +41,7 @@ private:
> explicit VisitedLinkTableController(uint64_t identifier);
> 
> // WebCore::VisitedLinkStore.
>- bool isLinkVisited(WebCore::Page&, WebCore::SharedStringHash, const URL& baseURL, const AtomicString& attributeURL) override;
>+ bool isLinkVisited(WebCore::Page&, WebCore::SharedStringHash, const URL& baseURL, const AtomString& attributeURL) override;
> void addVisitedLink(WebCore::Page&, WebCore::SharedStringHash) override;
> 
> // IPC::MessageReceiver.
>diff --git a/Source/WebKit/WebProcess/WebPage/ios/WebPageIOS.mm b/Source/WebKit/WebProcess/WebPage/ios/WebPageIOS.mm
>index 75d12f541d85760806398dfb52eade97e8c0f3dc..c6dbee9822d5a87fc4fb47766daed56cc548f385 100644
>--- a/Source/WebKit/WebProcess/WebPage/ios/WebPageIOS.mm
>+++ b/Source/WebKit/WebProcess/WebPage/ios/WebPageIOS.mm
>@@ -2906,7 +2906,7 @@ void WebPage::getFocusedElementInformation(FocusedElementInformation& informatio
> else if (element.isURLField())
> information.elementType = InputType::URL;
> else if (element.isText()) {
>- const AtomicString& pattern = element.attributeWithoutSynchronization(HTMLNames::patternAttr);
>+ const AtomString& pattern = element.attributeWithoutSynchronization(HTMLNames::patternAttr);
> if (pattern == "\\d*" || pattern == "[0-9]*")
> information.elementType = InputType::NumberPad;
> else {
>diff --git a/Source/WebKit/WebProcess/WebProcess.h b/Source/WebKit/WebProcess/WebProcess.h
>index 89901cecf0f96fb2288345d57da8aaaf46f4cfb1..d4c01bab1f93da9085b0f2194cd327d4718650b2 100644
>--- a/Source/WebKit/WebProcess/WebProcess.h
>+++ b/Source/WebKit/WebProcess/WebProcess.h
>@@ -52,8 +52,8 @@
> #include <wtf/HashMap.h>
> #include <wtf/HashSet.h>
> #include <wtf/RefCounter.h>
>-#include <wtf/text/AtomicString.h>
>-#include <wtf/text/AtomicStringHash.h>
>+#include <wtf/text/AtomString.h>
>+#include <wtf/text/AtomStringHash.h>
> 
> #if PLATFORM(COCOA)
> #include <dispatch/dispatch.h>
>diff --git a/Source/WebKitLegacy/ios/WebCoreSupport/SearchPopupMenuIOS.cpp b/Source/WebKitLegacy/ios/WebCoreSupport/SearchPopupMenuIOS.cpp
>index 8049b1ccc272c3472599e4942e5006cb8681517a..c01ecbc531c446835ce83482bd8bfbe2ac8834df 100644
>--- a/Source/WebKitLegacy/ios/WebCoreSupport/SearchPopupMenuIOS.cpp
>+++ b/Source/WebKitLegacy/ios/WebCoreSupport/SearchPopupMenuIOS.cpp
>@@ -19,7 +19,7 @@
> 
> #include "SearchPopupMenuIOS.h"
> 
>-#include <wtf/text/AtomicString.h>
>+#include <wtf/text/AtomString.h>
> 
> #if PLATFORM(IOS_FAMILY)
> 
>@@ -35,11 +35,11 @@ PopupMenu* SearchPopupMenuIOS::popupMenu()
> return m_popup.ptr();
> }
> 
>-void SearchPopupMenuIOS::saveRecentSearches(const AtomicString&, const Vector<RecentSearch>& /*searchItems*/)
>+void SearchPopupMenuIOS::saveRecentSearches(const AtomString&, const Vector<RecentSearch>& /*searchItems*/)
> {
> }
> 
>-void SearchPopupMenuIOS::loadRecentSearches(const AtomicString&, Vector<RecentSearch>& /*searchItems*/)
>+void SearchPopupMenuIOS::loadRecentSearches(const AtomString&, Vector<RecentSearch>& /*searchItems*/)
> {
> }
> 
>diff --git a/Source/WebKitLegacy/ios/WebCoreSupport/SearchPopupMenuIOS.h b/Source/WebKitLegacy/ios/WebCoreSupport/SearchPopupMenuIOS.h
>index 0ef44b42a660ae352c8bee69550ab2df0f9534e9..369f8691816ffd0a7717ab94bfd1d6f380fbfcad 100644
>--- a/Source/WebKitLegacy/ios/WebCoreSupport/SearchPopupMenuIOS.h
>+++ b/Source/WebKitLegacy/ios/WebCoreSupport/SearchPopupMenuIOS.h
>@@ -33,8 +33,8 @@ public:
> SearchPopupMenuIOS(WebCore::PopupMenuClient*);
> 
> WebCore::PopupMenu* popupMenu() override;
>- void saveRecentSearches(const AtomicString& name, const Vector<WebCore::RecentSearch>&) override;
>- void loadRecentSearches(const AtomicString& name, Vector<WebCore::RecentSearch>&) override;
>+ void saveRecentSearches(const AtomString& name, const Vector<WebCore::RecentSearch>&) override;
>+ void loadRecentSearches(const AtomString& name, Vector<WebCore::RecentSearch>&) override;
> bool enabled() override;
> 
> private:
>diff --git a/Source/WebKitLegacy/mac/DOM/DOMDocument.mm b/Source/WebKitLegacy/mac/DOM/DOMDocument.mm
>index 7d33c7edbb206f3b6e24d7dcbfda4e123ed285a5..319933f8d67e69893f5b0934985bc5c50860eb6e 100644
>--- a/Source/WebKitLegacy/mac/DOM/DOMDocument.mm
>+++ b/Source/WebKitLegacy/mac/DOM/DOMDocument.mm
>@@ -731,7 +731,7 @@ - (void)webkitExitFullscreen
> - (DOMElement *)getElementById:(NSString *)elementId
> {
> WebCore::JSMainThreadNullState state;
>- return kit(WTF::getPtr(IMPL->getElementById(AtomicString(elementId))));
>+ return kit(WTF::getPtr(IMPL->getElementById(AtomString(elementId))));
> }
> 
> - (DOMElement *)querySelector:(NSString *)selectors
>diff --git a/Source/WebKitLegacy/mac/DOM/DOMDocumentFragment.mm b/Source/WebKitLegacy/mac/DOM/DOMDocumentFragment.mm
>index 2ee2cf84c63948c0002f8a65d8cd669a7679d24c..eb2ec015b950b3a08697f909d8db5fec0d361d4c 100644
>--- a/Source/WebKitLegacy/mac/DOM/DOMDocumentFragment.mm
>+++ b/Source/WebKitLegacy/mac/DOM/DOMDocumentFragment.mm
>@@ -72,7 +72,7 @@ - (unsigned)childElementCount
> - (DOMElement *)getElementById:(NSString *)elementId
> {
> WebCore::JSMainThreadNullState state;
>- return kit(WTF::getPtr(IMPL->getElementById(AtomicString(elementId))));
>+ return kit(WTF::getPtr(IMPL->getElementById(AtomString(elementId))));
> }
> 
> - (DOMElement *)querySelector:(NSString *)selectors
>diff --git a/Source/WebKitLegacy/mac/WebCoreSupport/SearchPopupMenuMac.h b/Source/WebKitLegacy/mac/WebCoreSupport/SearchPopupMenuMac.h
>index 553dc7e491ee36134723755d3090e58c370bda77..1ac17c9cc3e71de21e456b41f416f6880284db77 100644
>--- a/Source/WebKitLegacy/mac/WebCoreSupport/SearchPopupMenuMac.h
>+++ b/Source/WebKitLegacy/mac/WebCoreSupport/SearchPopupMenuMac.h
>@@ -35,8 +35,8 @@ public:
> ~SearchPopupMenuMac();
> 
> WebCore::PopupMenu* popupMenu() override;
>- void saveRecentSearches(const AtomicString& name, const Vector<WebCore::RecentSearch>&) override;
>- void loadRecentSearches(const AtomicString& name, Vector<WebCore::RecentSearch>&) override;
>+ void saveRecentSearches(const AtomString& name, const Vector<WebCore::RecentSearch>&) override;
>+ void loadRecentSearches(const AtomString& name, Vector<WebCore::RecentSearch>&) override;
> bool enabled() override;
> 
> private:
>diff --git a/Source/WebKitLegacy/mac/WebCoreSupport/SearchPopupMenuMac.mm b/Source/WebKitLegacy/mac/WebCoreSupport/SearchPopupMenuMac.mm
>index aed51da904d561b9fef1931a32ffae540e669b76..eefd1d1d86c6d273577e9f41c0d088780b6bfb9d 100644
>--- a/Source/WebKitLegacy/mac/WebCoreSupport/SearchPopupMenuMac.mm
>+++ b/Source/WebKitLegacy/mac/WebCoreSupport/SearchPopupMenuMac.mm
>@@ -21,7 +21,7 @@
> #import "SearchPopupMenuMac.h"
> 
> #include "PopupMenuMac.h"
>-#include <wtf/text/AtomicString.h>
>+#include <wtf/text/AtomString.h>
> 
> SearchPopupMenuMac::SearchPopupMenuMac(WebCore::PopupMenuClient* client)
> : m_popup(adoptRef(new PopupMenuMac(client)))
>@@ -42,12 +42,12 @@ bool SearchPopupMenuMac::enabled()
> return true;
> }
> 
>-void SearchPopupMenuMac::saveRecentSearches(const AtomicString& name, const Vector<WebCore::RecentSearch>& searchItems)
>+void SearchPopupMenuMac::saveRecentSearches(const AtomString& name, const Vector<WebCore::RecentSearch>& searchItems)
> {
> WebCore::saveRecentSearches(name, searchItems);
> }
> 
>-void SearchPopupMenuMac::loadRecentSearches(const AtomicString& name, Vector<WebCore::RecentSearch>& searchItems)
>+void SearchPopupMenuMac::loadRecentSearches(const AtomString& name, Vector<WebCore::RecentSearch>& searchItems)
> {
> searchItems = WebCore::loadRecentSearches(name);
> }
>diff --git a/Source/WebKitLegacy/mac/WebCoreSupport/WebVisitedLinkStore.h b/Source/WebKitLegacy/mac/WebCoreSupport/WebVisitedLinkStore.h
>index 20ee51879455972ab4b03c462ae31f3949ec913d..9050ca8265d561f107263d0b2e110d50e818ee30 100644
>--- a/Source/WebKitLegacy/mac/WebCoreSupport/WebVisitedLinkStore.h
>+++ b/Source/WebKitLegacy/mac/WebCoreSupport/WebVisitedLinkStore.h
>@@ -44,7 +44,7 @@ public:
> private:
> WebVisitedLinkStore();
> 
>- bool isLinkVisited(WebCore::Page&, WebCore::SharedStringHash, const URL& baseURL, const AtomicString& attributeURL) override;
>+ bool isLinkVisited(WebCore::Page&, WebCore::SharedStringHash, const URL& baseURL, const AtomString& attributeURL) override;
> void addVisitedLink(WebCore::Page&, WebCore::SharedStringHash) override;
> 
> void populateVisitedLinksIfNeeded(WebCore::Page&);
>diff --git a/Source/WebKitLegacy/mac/WebCoreSupport/WebVisitedLinkStore.mm b/Source/WebKitLegacy/mac/WebCoreSupport/WebVisitedLinkStore.mm
>index ad3ca278bbd5e4405315280e546d43ba4cc50504..0844b39d3670553a0932271cedb739070a185c8b 100644
>--- a/Source/WebKitLegacy/mac/WebCoreSupport/WebVisitedLinkStore.mm
>+++ b/Source/WebKitLegacy/mac/WebCoreSupport/WebVisitedLinkStore.mm
>@@ -105,7 +105,7 @@ void WebVisitedLinkStore::removeVisitedLink(NSString *urlString)
> invalidateStylesForLink(linkHash);
> }
> 
>-bool WebVisitedLinkStore::isLinkVisited(Page& page, SharedStringHash linkHash, const URL& baseURL, const AtomicString& attributeURL)
>+bool WebVisitedLinkStore::isLinkVisited(Page& page, SharedStringHash linkHash, const URL& baseURL, const AtomString& attributeURL)
> {
> populateVisitedLinksIfNeeded(page);
> 
>diff --git a/Source/WebKitLegacy/mac/WebView/WebHTMLRepresentation.mm b/Source/WebKitLegacy/mac/WebView/WebHTMLRepresentation.mm
>index cc4aa6c9044d1989ba3be084dfcc3fa20f8532f3..76a575acd973c32652c2840a9113fbf0a893f845 100644
>--- a/Source/WebKitLegacy/mac/WebView/WebHTMLRepresentation.mm
>+++ b/Source/WebKitLegacy/mac/WebView/WebHTMLRepresentation.mm
>@@ -285,7 +285,7 @@ - (DOMElement *)elementWithName:(NSString *)name inForm:(DOMElement *)form
> 
> ScriptDisallowedScope::InMainThread scriptDisallowedScope;
> auto& elements = formElement->unsafeAssociatedElements();
>- AtomicString targetName = name;
>+ AtomString targetName = name;
> for (unsigned i = 0; i < elements.size(); i++) {
> FormAssociatedElement& element = *elements[i];
> if (element.name() == targetName)
>diff --git a/Source/WebKitLegacy/win/AccessibleBase.cpp b/Source/WebKitLegacy/win/AccessibleBase.cpp
>index 542477a9e9e0a942d65be0ee2c90b4d2969a6c38..d8391b53f64e811ef9113d82e3df2242dac9543a 100644
>--- a/Source/WebKitLegacy/win/AccessibleBase.cpp
>+++ b/Source/WebKitLegacy/win/AccessibleBase.cpp
>@@ -143,7 +143,7 @@ HRESULT AccessibleBase::get_attribute(_In_ BSTR key, _Out_ VARIANT* value)
> if (!value)
> return E_POINTER;
> 
>- AtomicString keyAtomic(key, ::SysStringLen(key));
>+ AtomString keyAtomic(key, ::SysStringLen(key));
> 
> accessibilityAttributeValue(keyAtomic, value);
> 
>diff --git a/Source/WebKitLegacy/win/AccessibleImage.cpp b/Source/WebKitLegacy/win/AccessibleImage.cpp
>index 5ff52244d9a06c23019dbfa50ed7427ecc88f884..5b666456520ad05d91ddda1bae7ef7fe0c8f585c 100644
>--- a/Source/WebKitLegacy/win/AccessibleImage.cpp
>+++ b/Source/WebKitLegacy/win/AccessibleImage.cpp
>@@ -49,7 +49,7 @@ String AccessibleImage::name() const
> if (!ariaLabel.isEmpty())
> return ariaLabel;
> 
>- const AtomicString& altText = obj.getAttribute(HTMLNames::altAttr);
>+ const AtomString& altText = obj.getAttribute(HTMLNames::altAttr);
> if (!altText.isEmpty())
> return altText;
> 
>diff --git a/Source/WebKitLegacy/win/DOMCoreClasses.cpp b/Source/WebKitLegacy/win/DOMCoreClasses.cpp
>index eada3e6bc55c0017fec9f0ec1958d9c41c77efa1..b6264373d65c89659e07549230a2c11298ee2b19 100644
>--- a/Source/WebKitLegacy/win/DOMCoreClasses.cpp
>+++ b/Source/WebKitLegacy/win/DOMCoreClasses.cpp
>@@ -66,7 +66,7 @@ DEFINE_GUID(IID_DOMElement, 0x3b0c0eff, 0x478b, 0x4b0b, 0x82, 0x90, 0xd2, 0x32,
> // "DOMObject" exists both in the WebCore namespace and unnamespaced in this
> // file, which leads to ambiguities if we say "using namespace WebCore".
> using namespace WebCore::HTMLNames;
>-using WTF::AtomicString;
>+using WTF::AtomString;
> using WebCore::BString;
> using WebCore::Element;
> using WebCore::ExceptionCode;
>@@ -1286,7 +1286,7 @@ HRESULT DOMElement::font(_Out_ WebFontDescription* webFontDescription)
> return E_FAIL;
> 
> auto fontDescription = renderer->style().fontCascade().fontDescription();
>- AtomicString family = fontDescription.firstFamily();
>+ AtomString family = fontDescription.firstFamily();
> 
> // FIXME: This leaks. Delete this whole function to get rid of the leak.
> UChar* familyCharactersBuffer = new UChar[family.length()];
>diff --git a/Source/WebKitLegacy/win/Interfaces/DOMEvents.idl b/Source/WebKitLegacy/win/Interfaces/DOMEvents.idl
>index 6b0130308489f60542a231a8e340e9dadaa21155..5c443268a40723eca62aa713deeb76f1ba265db0 100644
>--- a/Source/WebKitLegacy/win/Interfaces/DOMEvents.idl
>+++ b/Source/WebKitLegacy/win/Interfaces/DOMEvents.idl
>@@ -196,7 +196,7 @@ interface IDOMKeyboardEvent : IDOMUIEvent
> HRESULT getModifierState([in] BSTR keyIdentifierArg, [out, retval] BOOL* result);
> 
> // FIXME: this does not match the version in the DOM spec.
>- //void initKeyboardEvent(AtomicString type, 
>+ //void initKeyboardEvent(AtomString type, 
> // boolean canBubble, 
> // boolean cancelable, 
> // DOMWindow view, 
>@@ -216,7 +216,7 @@ interface IDOMKeyboardEvent : IDOMUIEvent
> //readonly attribute long charCode;
> //HRESULT charCode([out, retval] long* result);
> 
>- //void initKeyboardEvent(AtomicString type, 
>+ //void initKeyboardEvent(AtomString type, 
> // boolean canBubble, 
> // boolean cancelable, 
> // DOMWindow view, 
>@@ -266,7 +266,7 @@ interface IDOMMouseEvent : IDOMUIEvent
> //readonly attribute EventTarget relatedTarget;
> HRESULT relatedTarget([out, retval] IDOMEventTarget** result);
> 
>- //[OldStyleObjC] void initMouseEvent(AtomicString type, 
>+ //[OldStyleObjC] void initMouseEvent(AtomString type, 
> // boolean canBubble, 
> // boolean cancelable, 
> // DOMWindow view, 
>@@ -331,7 +331,7 @@ interface IDOMMutationEvent : IDOMEvent
> //readonly attribute unsigned short attrChange;
> HRESULT attrChange([out, retval] unsigned short* result);
> 
>- //[OldStyleObjC] void initMutationEvent(AtomicString type, 
>+ //[OldStyleObjC] void initMutationEvent(AtomString type, 
> // boolean canBubble, 
> // boolean cancelable, 
> // Node relatedNode, 
>@@ -378,7 +378,7 @@ interface IDOMUIEvent : IDOMEvent
> //readonly attribute long detail;
> HRESULT detail([out, retval] long* result);
> 
>- //[OldStyleObjC] void initUIEvent(AtomicString type, 
>+ //[OldStyleObjC] void initUIEvent(AtomString type, 
> // boolean canBubble, 
> // boolean cancelable, 
> // DOMWindow view, 
>diff --git a/Source/WebKitLegacy/win/WebCoreSupport/WebVisitedLinkStore.cpp b/Source/WebKitLegacy/win/WebCoreSupport/WebVisitedLinkStore.cpp
>index 2a7a7d7e578d45cb73a638b298deda846c790734..2a5e105367a0fff695f80531bc4b5c7b99999d73 100644
>--- a/Source/WebKitLegacy/win/WebCoreSupport/WebVisitedLinkStore.cpp
>+++ b/Source/WebKitLegacy/win/WebCoreSupport/WebVisitedLinkStore.cpp
>@@ -78,7 +78,7 @@ void WebVisitedLinkStore::addVisitedLink(const String& urlString)
> addVisitedLinkHash(computeSharedStringHash(urlString));
> }
> 
>-bool WebVisitedLinkStore::isLinkVisited(Page& page, SharedStringHash linkHash, const URL& baseURL, const AtomicString& attributeURL)
>+bool WebVisitedLinkStore::isLinkVisited(Page& page, SharedStringHash linkHash, const URL& baseURL, const AtomString& attributeURL)
> {
> populateVisitedLinksIfNeeded(page);
> 
>diff --git a/Source/WebKitLegacy/win/WebCoreSupport/WebVisitedLinkStore.h b/Source/WebKitLegacy/win/WebCoreSupport/WebVisitedLinkStore.h
>index 8bede9e2581918320270eab65274a7a906db58a0..cf8c3a8f9b21c3c24f23e94c288cc960695436ef 100644
>--- a/Source/WebKitLegacy/win/WebCoreSupport/WebVisitedLinkStore.h
>+++ b/Source/WebKitLegacy/win/WebCoreSupport/WebVisitedLinkStore.h
>@@ -42,7 +42,7 @@ public:
> private:
> WebVisitedLinkStore();
> 
>- bool isLinkVisited(WebCore::Page&, WebCore::SharedStringHash, const URL& baseURL, const AtomicString& attributeURL) override;
>+ bool isLinkVisited(WebCore::Page&, WebCore::SharedStringHash, const URL& baseURL, const AtomString& attributeURL) override;
> void addVisitedLink(WebCore::Page&, WebCore::SharedStringHash) override;
> 
> void populateVisitedLinksIfNeeded(WebCore::Page&);
>diff --git a/Source/WebKitLegacy/win/WebFrame.cpp b/Source/WebKitLegacy/win/WebFrame.cpp
>index 100d390614b545d11ae2aed6a5115d0cfcf332ab..2224209a3f20629779c07cfee802ff0d0bbc9b91 100644
>--- a/Source/WebKitLegacy/win/WebFrame.cpp
>+++ b/Source/WebKitLegacy/win/WebFrame.cpp
>@@ -731,7 +731,7 @@ HRESULT WebFrame::findFrameNamed(_In_ BSTR name, _COM_Outptr_opt_ IWebFrame** fr
> if (!coreFrame)
> return E_UNEXPECTED;
> 
>- Frame* foundFrame = coreFrame->tree().find(AtomicString(name, SysStringLen(name)), *coreFrame);
>+ Frame* foundFrame = coreFrame->tree().find(AtomString(name, SysStringLen(name)), *coreFrame);
> if (!foundFrame)
> return S_OK;
> 
>@@ -1130,7 +1130,7 @@ HRESULT WebFrame::elementWithName(BSTR name, IDOMElement* form, IDOMElement** el
> 
> HTMLFormElement* formElement = formElementFromDOMElement(form);
> if (formElement) {
>- AtomicString targetName((UChar*)name, SysStringLen(name));
>+ AtomString targetName((UChar*)name, SysStringLen(name));
> for (auto& associatedElement : formElement->copyAssociatedElementsVector()) {
> if (!is<HTMLFormControlElement>(associatedElement.get()))
> continue;
>diff --git a/Source/WebKitLegacy/win/WebKitGraphics.cpp b/Source/WebKitLegacy/win/WebKitGraphics.cpp
>index ad1ab178e42f442bd1c5523ffed6cb8ffe516bf0..875548bc4fa5c62cdb203aca9e1c5cb7be5245ba 100644
>--- a/Source/WebKitLegacy/win/WebKitGraphics.cpp
>+++ b/Source/WebKitLegacy/win/WebKitGraphics.cpp
>@@ -46,7 +46,7 @@ using namespace WebCore;
> 
> static FontCascade makeFont(const WebFontDescription& description)
> {
>- AtomicString::init();
>+ AtomString::init();
> 
> String fontFamilyString(description.family, description.familyLength);
> 
>diff --git a/Source/WebKitLegacy/win/WebMutableURLRequest.cpp b/Source/WebKitLegacy/win/WebMutableURLRequest.cpp
>index 1fe1145aec20088a6fb1fbf98db032c06d09b285..3362379884b3a4855d66c1768453c227e7c74147 100644
>--- a/Source/WebKitLegacy/win/WebMutableURLRequest.cpp
>+++ b/Source/WebKitLegacy/win/WebMutableURLRequest.cpp
>@@ -272,7 +272,7 @@ HRESULT WebMutableURLRequest::isEqual(_In_opt_ IWebURLRequest* other, _Out_ BOOL
> 
> HRESULT WebMutableURLRequest::addValue(_In_ BSTR value, _In_ BSTR field)
> {
>- m_request.addHTTPHeaderField(WTF::AtomicString(value, SysStringLen(value)), String(field, SysStringLen(field)));
>+ m_request.addHTTPHeaderField(WTF::AtomString(value, SysStringLen(value)), String(field, SysStringLen(field)));
> return S_OK;
> }
> 
>diff --git a/Source/WebKitLegacy/win/WebView.cpp b/Source/WebKitLegacy/win/WebView.cpp
>index a89acc000d5ee7b42e717c4e9f36d28cd5ca4a81..d51aa3457145d7fa7ce6161f86093a372dd3da94 100644
>--- a/Source/WebKitLegacy/win/WebView.cpp
>+++ b/Source/WebKitLegacy/win/WebView.cpp
>@@ -255,9 +255,9 @@ WebView* kit(Page* page)
> return static_cast<WebChromeClient&>(page->chrome().client()).webView();
> }
> 
>-static inline AtomicString toAtomicString(BSTR bstr)
>+static inline AtomString toAtomString(BSTR bstr)
> {
>- return AtomicString(bstr, SysStringLen(bstr));
>+ return AtomString(bstr, SysStringLen(bstr));
> }
> 
> static inline String toString(BSTR bstr)
>@@ -5115,7 +5115,7 @@ HRESULT WebView::notifyPreferencesChanged(IWebNotification* notification)
> hr = preferences->cursiveFontFamily(&str);
> if (FAILED(hr))
> return hr;
>- settings.setCursiveFontFamily(toAtomicString(str));
>+ settings.setCursiveFontFamily(toAtomString(str));
> str.clear();
> 
> hr = preferences->defaultFixedFontSize(&size);
>@@ -5137,13 +5137,13 @@ HRESULT WebView::notifyPreferencesChanged(IWebNotification* notification)
> hr = preferences->fantasyFontFamily(&str);
> if (FAILED(hr))
> return hr;
>- settings.setFantasyFontFamily(toAtomicString(str));
>+ settings.setFantasyFontFamily(toAtomString(str));
> str.clear();
> 
> hr = preferences->fixedFontFamily(&str);
> if (FAILED(hr))
> return hr;
>- settings.setFixedFontFamily(toAtomicString(str));
>+ settings.setFixedFontFamily(toAtomString(str));
> str.clear();
> 
> #if ENABLE(VIDEO_TRACK)
>@@ -5175,7 +5175,7 @@ HRESULT WebView::notifyPreferencesChanged(IWebNotification* notification)
> hr = preferences->pictographFontFamily(&str);
> if (FAILED(hr))
> return hr;
>- settings.setPictographFontFamily(toAtomicString(str));
>+ settings.setPictographFontFamily(toAtomString(str));
> str.clear();
> 
> hr = preferences->isJavaEnabled(&enabled);
>@@ -5311,19 +5311,19 @@ HRESULT WebView::notifyPreferencesChanged(IWebNotification* notification)
> hr = preferences->sansSerifFontFamily(&str);
> if (FAILED(hr))
> return hr;
>- settings.setSansSerifFontFamily(toAtomicString(str));
>+ settings.setSansSerifFontFamily(toAtomString(str));
> str.clear();
> 
> hr = preferences->serifFontFamily(&str);
> if (FAILED(hr))
> return hr;
>- settings.setSerifFontFamily(toAtomicString(str));
>+ settings.setSerifFontFamily(toAtomString(str));
> str.clear();
> 
> hr = preferences->standardFontFamily(&str);
> if (FAILED(hr))
> return hr;
>- settings.setStandardFontFamily(toAtomicString(str));
>+ settings.setStandardFontFamily(toAtomString(str));
> str.clear();
> 
> hr = preferences->loadsImagesAutomatically(&enabled);
>diff --git a/Tools/ChangeLog b/Tools/ChangeLog
>index d34482ad33657e9ea22e04eb5d13334b8370c9ad..848e48a66e9b1df7b4003b5dc34e3c2dc953ab8b 100644
>--- a/Tools/ChangeLog
>+++ b/Tools/ChangeLog
>@@ -1,3 +1,15 @@
>+2019-06-15 Darin Adler <darin@apple.com>
>+
>+ Rename AtomicString to AtomString
>+ https://bugs.webkit.org/show_bug.cgi?id=195276
>+
>+ Reviewed by NOBODY (OOPS!).
>+
>+ * many files: Let do-webcore-rename do the renaming.
>+
>+ * Scripts/do-webcore-rename: Updated with a list of all the identifiers
>+ that mention "atomic string" and changed them to instead say "atom string".
>+
> 2019-06-14 Youenn Fablet <youenn@apple.com>
> 
> WebResourceLoadStatisticsStore should not use its network session if invalidated
>diff --git a/Tools/DumpRenderTree/win/AccessibilityControllerWin.cpp b/Tools/DumpRenderTree/win/AccessibilityControllerWin.cpp
>index b414619879955b87870d62c7e4a9e462444e9c99..43aa360d11825ebd325d6a65b01d00d38265291c 100644
>--- a/Tools/DumpRenderTree/win/AccessibilityControllerWin.cpp
>+++ b/Tools/DumpRenderTree/win/AccessibilityControllerWin.cpp
>@@ -40,7 +40,7 @@
> #include <oleacc.h>
> #include <string>
> #include <wtf/Assertions.h>
>-#include <wtf/text/AtomicString.h>
>+#include <wtf/text/AtomString.h>
> 
> AccessibilityController::AccessibilityController() = default;
> 
>diff --git a/Tools/Scripts/do-webcore-rename b/Tools/Scripts/do-webcore-rename
>index 7b7ed396be2206c8fb4f1cff6c69e8dc03725c38..8998f7675e8d4c75e3bfc036185a64302c942bb7 100755
>--- a/Tools/Scripts/do-webcore-rename
>+++ b/Tools/Scripts/do-webcore-rename
>@@ -76,6 +76,8 @@ find(\&wanted, "Source/WTF");
> find(\&wanted, "Source/WebCore");
> find(\&wanted, "Source/WebKitLegacy");
> find(\&wanted, "Source/WebKit");
>+find(\&wanted, "Tools/gdb");
>+find(\&wanted, "Tools/lldb");
> find(\&wanted, "Tools/DumpRenderTree");
> find(\&wanted, "Tools/TestWebKitAPI");
> 
>@@ -100,13 +102,59 @@ sub wanted
> my $isDOMTypeRename = 0;
> my %renames = (
> # Renames go here in the form of:
>- "ConstructorRaisesException" => "ConstructorMayThrowLegacyException",
>- "GetterRaisesException" => "GetterMayThrowLegacyException",
>- "GetterRaisesExceptionWithMessage" => "GetterMayThrowLegacyExceptionWithMessage",
>- "RaisesException" => "MayThrowLegacyException",
>- "RaisesExceptionWithMessage" => "MayThrowLegacyExceptionWithMessage",
>- "SetterRaisesException" => "SetterMayThrowLegacyException",
>- "SetterRaisesExceptionWithMessage" => "SetterMayThrowLegacyExceptionWithMessage",
>+ "AtomicString" => "AtomString",
>+ "AtomicStringCreationFromLiteral" => "AtomStringCreationFromLiteral",
>+ "AtomicStringCreationFromLiteralUniqueness" => "AtomStringCreationFromLiteralUniqueness",
>+ "AtomicStringExistingHash" => "AtomStringExistingHash",
>+ "AtomicStringFromLiteralCannotOverflow" => "AtomStringFromLiteralCannotOverflow",
>+ "AtomicStringFromLiteralNotEmpty" => "AtomStringFromLiteralNotEmpty",
>+ "AtomicStringHash" => "AtomStringHash",
>+ "AtomicStringImpl" => "AtomStringImpl",
>+ "AtomicStringImplCF" => "AtomStringImplCF",
>+ "AtomicStringNumberDouble" => "AtomStringNumberDouble",
>+ "AtomicStringTable" => "AtomStringTable",
>+ "AtomicStringTable" => "AtomStringTable",
>+ "AtomicStringTableLocker" => "AtomStringTableLocker",
>+ "AtomicString_h" => "AtomString_h",
>+ "IDLAtomicStringAdaptor" => "IDLAtomStringAdaptor",
>+ "IDLRequiresExistingAtomicStringAdaptor" => "IDLRequiresExistingAtomStringAdaptor",
>+ "RequiresExistingAtomicString" => "RequiresExistingAtomString",
>+ "StringImplNullSymbolToAtomicString" => "StringImplNullSymbolToAtomString",
>+ "StringImplStaticToAtomicString" => "StringImplStaticToAtomString",
>+ "StringImplSymbolToAtomicString" => "StringImplSymbolToAtomString",
>+ "ToAtomicString" => "ToAtomString",
>+ "ToAtomicStringOnEmpty" => "ToAtomStringOnEmpty",
>+ "TokenAtomicStringInitializer" => "TokenAtomStringInitializer",
>+ "WTFAtomicStringPrinter" => "WTFAtomStringPrinter",
>+ "WTFAtomicString_SummaryProvider" => "WTFAtomString_SummaryProvider",
>+ "atomicString" => "atomString",
>+ "atomicString1" => "atomString1",
>+ "atomicString2" => "atomString2",
>+ "atomicStringTable" => "atomStringTable",
>+ "atomicStringWithTemplate" => "atomStringWithTemplate",
>+ "atomicStrings" => "atomStrings",
>+ "checkCurrentAtomicStringTable" => "checkCurrentAtomStringTable",
>+ "existingAtomicString" => "existingAtomString",
>+ "existingEntryAtomicStringTable" => "existingEntryAtomStringTable",
>+ "getPropertyNameAtomicString" => "getPropertyNameAtomString",
>+ "getValueNameAtomicString" => "getValueNameAtomString",
>+ "isAtomic" => "isAtom",
>+ "isAtomicString" => "isAtomString",
>+ "isInAtomicStringTable" => "isInAtomStringTable",
>+ "m_atomicStringTable" => "m_atomStringTable",
>+ "m_currentAtomicStringTable" => "m_currentAtomStringTable",
>+ "m_defaultAtomicStringTable" => "m_defaultAtomStringTable",
>+ "m_entryAtomicStringTable" => "m_entryAtomStringTable",
>+ "oldAtomicStringTable" => "oldAtomStringTable",
>+ "propertyNameToAtomicString" => "propertyNameToAtomString",
>+ "resolveRopeToAtomicString" => "resolveRopeToAtomString",
>+ "resolveRopeToExistingAtomicString" => "resolveRopeToExistingAtomString",
>+ "setCurrentAtomicStringTable" => "setCurrentAtomStringTable",
>+ "shouldUseAtomicString" => "shouldUseAtomString",
>+ "testAtomicStringNumber" => "testAtomStringNumber",
>+ "toAtomicString" => "toAtomString",
>+ "toExistingAtomicString" => "toExistingAtomString",
>+ "useAtomicString" => "useAtomString",
> );
> 
> my %renamesContemplatedForTheFuture = (
>@@ -219,17 +267,10 @@ for my $file (sort @paths) {
> }
> } else {
> for my $from (@sortedRenameKeys) {
>- $newContents =~ s/\b$from(?!["\w])/$renames{$from}/g; # this " unconfuses Xcode syntax highlighting
>+ $newContents =~ s/\b$from\b/$renames{$from}/g; # this " unconfuses Xcode syntax highlighting
> }
> }
> 
>- # Remove the "virtual" keyword from virtual/override lines.
>- # Should be a no-op but also OK to remove this any time, now that we have done it once.
>- $newContents =~ s/^(\s*(\w+EXPORT\w*\s+)?)virtual ([^{;]+ override\b)/$1$3/mg;
>- $newContents =~ s/^(\s*(\w+EXPORT\w*\s+)?)virtual ([^{;]+ final\b)/$1$3/mg;
>- $newContents =~ s/\boverride\s+final\b/final/g;
>- $newContents =~ s/\bfinal\s+override\b/final/g;
>-
> if ($newContents ne $contents) {
> open FILE, ">", $file or die "Failed to open $file";
> print FILE $newContents;
>diff --git a/Tools/TestWebKitAPI/CMakeLists.txt b/Tools/TestWebKitAPI/CMakeLists.txt
>index c49d97aedc3b1a1ce240468ba837251788a27180..7adb608eeaa611b66b1ed5074a5917d0a0df8548 100644
>--- a/Tools/TestWebKitAPI/CMakeLists.txt
>+++ b/Tools/TestWebKitAPI/CMakeLists.txt
>@@ -24,7 +24,7 @@ set(TestWTF_SOURCES
> Counters.cpp
> TestsController.cpp
> 
>- Tests/WTF/AtomicString.cpp
>+ Tests/WTF/AtomString.cpp
> Tests/WTF/BloomFilter.cpp
> Tests/WTF/CString.cpp
> Tests/WTF/CheckedArithmeticOperations.cpp
>diff --git a/Tools/TestWebKitAPI/TestWebKitAPI.xcodeproj/project.pbxproj b/Tools/TestWebKitAPI/TestWebKitAPI.xcodeproj/project.pbxproj
>index f6069bd88953cc3510b087e1a0e2a2c7dfa40e56..fdbcd968ad33f26db15a4cf4841ed064cd18396c 100644
>--- a/Tools/TestWebKitAPI/TestWebKitAPI.xcodeproj/project.pbxproj
>+++ b/Tools/TestWebKitAPI/TestWebKitAPI.xcodeproj/project.pbxproj
>@@ -406,7 +406,7 @@
> 		7C3DB8E41D12129B00AE8CC3 /* CommandBackForward.mm in Sources */ = {isa = PBXBuildFile; fileRef = 7C3DB8E21D12129B00AE8CC3 /* CommandBackForward.mm */; };
> 		7C417F331D19E14800B8EF53 /* WKWebViewDefaultNavigationDelegate.mm in Sources */ = {isa = PBXBuildFile; fileRef = 7C417F311D19E14800B8EF53 /* WKWebViewDefaultNavigationDelegate.mm */; };
> 		7C486BA11AA12567003F6F9B /* bundle-file.html in Copy Resources */ = {isa = PBXBuildFile; fileRef = 7C486BA01AA1254B003F6F9B /* bundle-file.html */; };
>-		7C83DE991D0A590C00FEBCF3 /* AtomicString.cpp in Sources */ = {isa = PBXBuildFile; fileRef = 26F1B44215CA434F00D1E4BF /* AtomicString.cpp */; };
>+		7C83DE991D0A590C00FEBCF3 /* AtomString.cpp in Sources */ = {isa = PBXBuildFile; fileRef = 26F1B44215CA434F00D1E4BF /* AtomString.cpp */; };
> 		7C83DE9C1D0A590C00FEBCF3 /* BloomFilter.cpp in Sources */ = {isa = PBXBuildFile; fileRef = E40019301ACE9B5C001B0A2A /* BloomFilter.cpp */; };
> 		7C83DEA01D0A590C00FEBCF3 /* CheckedArithmeticOperations.cpp in Sources */ = {isa = PBXBuildFile; fileRef = A7A966DA140ECCC8005EF9B4 /* CheckedArithmeticOperations.cpp */; };
> 		7C83DEA61D0A590C00FEBCF3 /* Counters.cpp in Sources */ = {isa = PBXBuildFile; fileRef = 7C6BBD8B19CEA63000C1F5E0 /* Counters.cpp */; };
>@@ -1461,7 +1461,7 @@
> 		26B2DFF815BDE599004F691D /* HashSet.cpp */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.cpp.cpp; path = HashSet.cpp; sourceTree = "<group>"; };
> 		26DF5A5D15A29BAA003689C2 /* CancelLoadFromResourceLoadDelegate.mm */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.cpp.objcpp; path = CancelLoadFromResourceLoadDelegate.mm; sourceTree = "<group>"; };
> 		26DF5A6115A2A22B003689C2 /* CancelLoadFromResourceLoadDelegate.html */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = text.html; path = CancelLoadFromResourceLoadDelegate.html; sourceTree = "<group>"; };
>-		26F1B44215CA434F00D1E4BF /* AtomicString.cpp */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.cpp.cpp; path = AtomicString.cpp; sourceTree = "<group>"; };
>+		26F1B44215CA434F00D1E4BF /* AtomString.cpp */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.cpp.cpp; path = AtomString.cpp; sourceTree = "<group>"; };
> 		26F1B44315CA434F00D1E4BF /* StringImpl.cpp */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.cpp.cpp; path = StringImpl.cpp; sourceTree = "<group>"; };
> 		26F52EAA182872600023D412 /* Geolocation.cpp */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.cpp.cpp; path = Geolocation.cpp; sourceTree = "<group>"; };
> 		26F52EAC1828820E0023D412 /* geolocationGetCurrentPosition.html */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = text.html; path = geolocationGetCurrentPosition.html; sourceTree = "<group>"; };
>@@ -3392,7 +3392,7 @@
> 				E3C21A7821B25C82003B31A3 /* cocoa */,
> 				7CBBA07519BB8A0900BBF025 /* darwin */,
> 				BC029B1A1486B23800817DA9 /* ns */,
>-				26F1B44215CA434F00D1E4BF /* AtomicString.cpp */,
>+				26F1B44215CA434F00D1E4BF /* AtomString.cpp */,
> 				E40019301ACE9B5C001B0A2A /* BloomFilter.cpp */,
> 				A7A966DA140ECCC8005EF9B4 /* CheckedArithmeticOperations.cpp */,
> 				0F30CB5B1FCE1792004B5323 /* ConcurrentPtrHashSet.cpp */,
>@@ -4010,7 +4010,7 @@
> 			isa = PBXSourcesBuildPhase;
> 			buildActionMask = 2147483647;
> 			files = (
>-				7C83DE991D0A590C00FEBCF3 /* AtomicString.cpp in Sources */,
>+				7C83DE991D0A590C00FEBCF3 /* AtomString.cpp in Sources */,
> 				1ADAD1501D77A9F600212586 /* BlockPtr.mm in Sources */,
> 				7C83DE9C1D0A590C00FEBCF3 /* BloomFilter.cpp in Sources */,
> 				7C83DEA01D0A590C00FEBCF3 /* CheckedArithmeticOperations.cpp in Sources */,
>diff --git a/Tools/TestWebKitAPI/Tests/WTF/AtomString.cpp b/Tools/TestWebKitAPI/Tests/WTF/AtomString.cpp
>new file mode 100644
>index 0000000000000000000000000000000000000000..be74154e388ba7c56461ec96ba7003e1d92b68ea
>--- /dev/null
>+++ b/Tools/TestWebKitAPI/Tests/WTF/AtomString.cpp
>@@ -0,0 +1,113 @@
>+/*
>+ * Copyright (C) 2012-2017 Apple Inc. All rights reserved.
>+ *
>+ * Redistribution and use in source and binary forms, with or without
>+ * modification, are permitted provided that the following conditions
>+ * are met:
>+ * 1. Redistributions of source code must retain the above copyright
>+ * notice, this list of conditions and the following disclaimer.
>+ * 2. Redistributions in binary form must reproduce the above copyright
>+ * notice, this list of conditions and the following disclaimer in the
>+ * documentation and/or other materials provided with the distribution.
>+ *
>+ * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
>+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
>+ * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
>+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
>+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
>+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
>+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
>+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
>+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
>+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
>+ * THE POSSIBILITY OF SUCH DAMAGE.
>+ */
>+
>+#include "config.h"
>+
>+#include <wtf/text/AtomString.h>
>+
>+namespace TestWebKitAPI {
>+
>+TEST(WTF, AtomStringCreationFromLiteral)
>+{
>+ AtomString stringWithTemplate("Template Literal", AtomString::ConstructFromLiteral);
>+ ASSERT_EQ(strlen("Template Literal"), stringWithTemplate.length());
>+ ASSERT_TRUE(stringWithTemplate == "Template Literal");
>+ ASSERT_TRUE(stringWithTemplate.string().is8Bit());
>+
>+ const char* programmaticStringData = "Explicit Size Literal";
>+ AtomString programmaticString(programmaticStringData, strlen(programmaticStringData), AtomString::ConstructFromLiteral);
>+ ASSERT_EQ(strlen(programmaticStringData), programmaticString.length());
>+ ASSERT_TRUE(programmaticString.string().is8Bit());
>+ ASSERT_EQ(programmaticStringData, reinterpret_cast<const char*>(programmaticString.string().characters8()));
>+}
>+
>+TEST(WTF, AtomStringCreationFromLiteralUniqueness)
>+{
>+ AtomString string1("Template Literal", AtomString::ConstructFromLiteral);
>+ AtomString string2("Template Literal", AtomString::ConstructFromLiteral);
>+ ASSERT_EQ(string1.impl(), string2.impl());
>+
>+ AtomString string3("Template Literal");
>+ ASSERT_EQ(string1.impl(), string3.impl());
>+}
>+
>+TEST(WTF, AtomStringExistingHash)
>+{
>+ AtomString string1("Template Literal", AtomString::ConstructFromLiteral);
>+ ASSERT_EQ(string1.existingHash(), string1.impl()->existingHash());
>+ AtomString string2;
>+ ASSERT_EQ(string2.existingHash(), 0u);
>+}
>+
>+static inline const char* testAtomStringNumber(double number)
>+{
>+ static char testBuffer[100] = { };
>+ std::strncpy(testBuffer, AtomString::number(number).string().utf8().data(), 99);
>+ return testBuffer;
>+}
>+
>+TEST(WTF, AtomStringNumberDouble)
>+{
>+ using Limits = std::numeric_limits<double>;
>+
>+ EXPECT_STREQ("Infinity", testAtomStringNumber(Limits::infinity()));
>+ EXPECT_STREQ("-Infinity", testAtomStringNumber(-Limits::infinity()));
>+
>+ EXPECT_STREQ("NaN", testAtomStringNumber(-Limits::quiet_NaN()));
>+
>+ EXPECT_STREQ("0", testAtomStringNumber(0));
>+ EXPECT_STREQ("0", testAtomStringNumber(-0));
>+
>+ EXPECT_STREQ("2.2250738585072014e-308", testAtomStringNumber(Limits::min()));
>+ EXPECT_STREQ("-1.7976931348623157e+308", testAtomStringNumber(Limits::lowest()));
>+ EXPECT_STREQ("1.7976931348623157e+308", testAtomStringNumber(Limits::max()));
>+
>+ EXPECT_STREQ("3.141592653589793", testAtomStringNumber(piDouble));
>+ EXPECT_STREQ("3.1415927410125732", testAtomStringNumber(piFloat));
>+ EXPECT_STREQ("1.5707963267948966", testAtomStringNumber(piOverTwoDouble));
>+ EXPECT_STREQ("1.5707963705062866", testAtomStringNumber(piOverTwoFloat));
>+ EXPECT_STREQ("0.7853981633974483", testAtomStringNumber(piOverFourDouble));
>+ EXPECT_STREQ("0.7853981852531433", testAtomStringNumber(piOverFourFloat));
>+
>+ EXPECT_STREQ("2.718281828459045", testAtomStringNumber(2.71828182845904523536028747135266249775724709369995));
>+
>+ EXPECT_STREQ("299792458", testAtomStringNumber(299792458));
>+
>+ EXPECT_STREQ("1.618033988749895", testAtomStringNumber(1.6180339887498948482));
>+
>+ EXPECT_STREQ("1000", testAtomStringNumber(1e3));
>+ EXPECT_STREQ("10000000000", testAtomStringNumber(1e10));
>+ EXPECT_STREQ("100000000000000000000", testAtomStringNumber(1e20));
>+ EXPECT_STREQ("1e+21", testAtomStringNumber(1e21));
>+ EXPECT_STREQ("1e+30", testAtomStringNumber(1e30));
>+
>+ EXPECT_STREQ("1100", testAtomStringNumber(1.1e3));
>+ EXPECT_STREQ("11000000000", testAtomStringNumber(1.1e10));
>+ EXPECT_STREQ("110000000000000000000", testAtomStringNumber(1.1e20));
>+ EXPECT_STREQ("1.1e+21", testAtomStringNumber(1.1e21));
>+ EXPECT_STREQ("1.1e+30", testAtomStringNumber(1.1e30));
>+}
>+
>+} // namespace TestWebKitAPI
>diff --git a/Tools/TestWebKitAPI/Tests/WTF/AtomicString.cpp b/Tools/TestWebKitAPI/Tests/WTF/AtomicString.cpp
>deleted file mode 100644
>index 08b1f805215361b1c3f2add92b47cae069d97822..0000000000000000000000000000000000000000
>--- a/Tools/TestWebKitAPI/Tests/WTF/AtomicString.cpp
>+++ /dev/null
>@@ -1,113 +0,0 @@
>-/*
>- * Copyright (C) 2012-2017 Apple Inc. All rights reserved.
>- *
>- * Redistribution and use in source and binary forms, with or without
>- * modification, are permitted provided that the following conditions
>- * are met:
>- * 1. Redistributions of source code must retain the above copyright
>- * notice, this list of conditions and the following disclaimer.
>- * 2. Redistributions in binary form must reproduce the above copyright
>- * notice, this list of conditions and the following disclaimer in the
>- * documentation and/or other materials provided with the distribution.
>- *
>- * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
>- * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
>- * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
>- * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
>- * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
>- * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
>- * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
>- * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
>- * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
>- * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
>- * THE POSSIBILITY OF SUCH DAMAGE.
>- */
>-
>-#include "config.h"
>-
>-#include <wtf/text/AtomicString.h>
>-
>-namespace TestWebKitAPI {
>-
>-TEST(WTF, AtomicStringCreationFromLiteral)
>-{
>- AtomicString stringWithTemplate("Template Literal", AtomicString::ConstructFromLiteral);
>- ASSERT_EQ(strlen("Template Literal"), stringWithTemplate.length());
>- ASSERT_TRUE(stringWithTemplate == "Template Literal");
>- ASSERT_TRUE(stringWithTemplate.string().is8Bit());
>-
>- const char* programmaticStringData = "Explicit Size Literal";
>- AtomicString programmaticString(programmaticStringData, strlen(programmaticStringData), AtomicString::ConstructFromLiteral);
>- ASSERT_EQ(strlen(programmaticStringData), programmaticString.length());
>- ASSERT_TRUE(programmaticString.string().is8Bit());
>- ASSERT_EQ(programmaticStringData, reinterpret_cast<const char*>(programmaticString.string().characters8()));
>-}
>-
>-TEST(WTF, AtomicStringCreationFromLiteralUniqueness)
>-{
>- AtomicString string1("Template Literal", AtomicString::ConstructFromLiteral);
>- AtomicString string2("Template Literal", AtomicString::ConstructFromLiteral);
>- ASSERT_EQ(string1.impl(), string2.impl());
>-
>- AtomicString string3("Template Literal");
>- ASSERT_EQ(string1.impl(), string3.impl());
>-}
>-
>-TEST(WTF, AtomicStringExistingHash)
>-{
>- AtomicString string1("Template Literal", AtomicString::ConstructFromLiteral);
>- ASSERT_EQ(string1.existingHash(), string1.impl()->existingHash());
>- AtomicString string2;
>- ASSERT_EQ(string2.existingHash(), 0u);
>-}
>-
>-static inline const char* testAtomicStringNumber(double number)
>-{
>- static char testBuffer[100] = { };
>- std::strncpy(testBuffer, AtomicString::number(number).string().utf8().data(), 99);
>- return testBuffer;
>-}
>-
>-TEST(WTF, AtomicStringNumberDouble)
>-{
>- using Limits = std::numeric_limits<double>;
>-
>- EXPECT_STREQ("Infinity", testAtomicStringNumber(Limits::infinity()));
>- EXPECT_STREQ("-Infinity", testAtomicStringNumber(-Limits::infinity()));
>-
>- EXPECT_STREQ("NaN", testAtomicStringNumber(-Limits::quiet_NaN()));
>-
>- EXPECT_STREQ("0", testAtomicStringNumber(0));
>- EXPECT_STREQ("0", testAtomicStringNumber(-0));
>-
>- EXPECT_STREQ("2.2250738585072014e-308", testAtomicStringNumber(Limits::min()));
>- EXPECT_STREQ("-1.7976931348623157e+308", testAtomicStringNumber(Limits::lowest()));
>- EXPECT_STREQ("1.7976931348623157e+308", testAtomicStringNumber(Limits::max()));
>-
>- EXPECT_STREQ("3.141592653589793", testAtomicStringNumber(piDouble));
>- EXPECT_STREQ("3.1415927410125732", testAtomicStringNumber(piFloat));
>- EXPECT_STREQ("1.5707963267948966", testAtomicStringNumber(piOverTwoDouble));
>- EXPECT_STREQ("1.5707963705062866", testAtomicStringNumber(piOverTwoFloat));
>- EXPECT_STREQ("0.7853981633974483", testAtomicStringNumber(piOverFourDouble));
>- EXPECT_STREQ("0.7853981852531433", testAtomicStringNumber(piOverFourFloat));
>-
>- EXPECT_STREQ("2.718281828459045", testAtomicStringNumber(2.71828182845904523536028747135266249775724709369995));
>-
>- EXPECT_STREQ("299792458", testAtomicStringNumber(299792458));
>-
>- EXPECT_STREQ("1.618033988749895", testAtomicStringNumber(1.6180339887498948482));
>-
>- EXPECT_STREQ("1000", testAtomicStringNumber(1e3));
>- EXPECT_STREQ("10000000000", testAtomicStringNumber(1e10));
>- EXPECT_STREQ("100000000000000000000", testAtomicStringNumber(1e20));
>- EXPECT_STREQ("1e+21", testAtomicStringNumber(1e21));
>- EXPECT_STREQ("1e+30", testAtomicStringNumber(1e30));
>-
>- EXPECT_STREQ("1100", testAtomicStringNumber(1.1e3));
>- EXPECT_STREQ("11000000000", testAtomicStringNumber(1.1e10));
>- EXPECT_STREQ("110000000000000000000", testAtomicStringNumber(1.1e20));
>- EXPECT_STREQ("1.1e+21", testAtomicStringNumber(1.1e21));
>- EXPECT_STREQ("1.1e+30", testAtomicStringNumber(1.1e30));
>-}
>-
>-} // namespace TestWebKitAPI
>diff --git a/Tools/TestWebKitAPI/Tests/WTF/StringBuilder.cpp b/Tools/TestWebKitAPI/Tests/WTF/StringBuilder.cpp
>index 7c9df6cc5da4871d5d4685fadfbb2f2266fe2dd5..ab67ce175da1eb6da8403677d045aea87bf74960 100644
>--- a/Tools/TestWebKitAPI/Tests/WTF/StringBuilder.cpp
>+++ b/Tools/TestWebKitAPI/Tests/WTF/StringBuilder.cpp
>@@ -276,77 +276,77 @@ TEST(StringBuilderTest, CanShrink)
> ASSERT_FALSE(builder.canShrink());
> }
> 
>-TEST(StringBuilderTest, ToAtomicString)
>+TEST(StringBuilderTest, ToAtomString)
> {
> StringBuilder builder;
> builder.append("123");
>- AtomicString atomicString = builder.toAtomicString();
>- ASSERT_EQ(String("123"), atomicString);
>+ AtomString atomString = builder.toAtomString();
>+ ASSERT_EQ(String("123"), atomString);
> 
> builder.reserveCapacity(256);
> ASSERT_TRUE(builder.canShrink());
> for (int i = builder.length(); i < 128; i++)
> builder.append('x');
>- AtomicString atomicString1 = builder.toAtomicString();
>- ASSERT_EQ(128u, atomicString1.length());
>- ASSERT_EQ('x', atomicString1[127]);
>+ AtomString atomString1 = builder.toAtomString();
>+ ASSERT_EQ(128u, atomString1.length());
>+ ASSERT_EQ('x', atomString1[127]);
> 
> // Later change of builder should not affect the atomic string.
> for (int i = builder.length(); i < 256; i++)
> builder.append('x');
>- ASSERT_EQ(128u, atomicString1.length());
>+ ASSERT_EQ(128u, atomString1.length());
> 
> ASSERT_FALSE(builder.canShrink());
> String string = builder.toString();
>- AtomicString atomicString2 = builder.toAtomicString();
>+ AtomString atomString2 = builder.toAtomString();
> // They should share the same StringImpl.
>- ASSERT_EQ(atomicString2.impl(), string.impl());
>+ ASSERT_EQ(atomString2.impl(), string.impl());
> }
> 
>-TEST(StringBuilderTest, ToAtomicStringOnEmpty)
>+TEST(StringBuilderTest, ToAtomStringOnEmpty)
> {
> { // Default constructed.
> StringBuilder builder;
>- AtomicString atomicString = builder.toAtomicString();
>- ASSERT_EQ(emptyAtom(), atomicString);
>+ AtomString atomString = builder.toAtomString();
>+ ASSERT_EQ(emptyAtom(), atomString);
> }
> { // With capacity.
> StringBuilder builder;
> builder.reserveCapacity(64);
>- AtomicString atomicString = builder.toAtomicString();
>- ASSERT_EQ(emptyAtom(), atomicString);
>+ AtomString atomString = builder.toAtomString();
>+ ASSERT_EQ(emptyAtom(), atomString);
> }
>- { // AtomicString constructed from a null string.
>+ { // AtomString constructed from a null string.
> StringBuilder builder;
> builder.append(String());
>- AtomicString atomicString = builder.toAtomicString();
>- ASSERT_EQ(emptyAtom(), atomicString);
>+ AtomString atomString = builder.toAtomString();
>+ ASSERT_EQ(emptyAtom(), atomString);
> }
>- { // AtomicString constructed from an empty string.
>+ { // AtomString constructed from an empty string.
> StringBuilder builder;
> builder.append(emptyString());
>- AtomicString atomicString = builder.toAtomicString();
>- ASSERT_EQ(emptyAtom(), atomicString);
>+ AtomString atomString = builder.toAtomString();
>+ ASSERT_EQ(emptyAtom(), atomString);
> }
>- { // AtomicString constructed from an empty StringBuilder.
>+ { // AtomString constructed from an empty StringBuilder.
> StringBuilder builder;
> StringBuilder emptyBuilder;
> builder.append(emptyBuilder);
>- AtomicString atomicString = builder.toAtomicString();
>- ASSERT_EQ(emptyAtom(), atomicString);
>+ AtomString atomString = builder.toAtomString();
>+ ASSERT_EQ(emptyAtom(), atomString);
> }
>- { // AtomicString constructed from an empty char* string.
>+ { // AtomString constructed from an empty char* string.
> StringBuilder builder;
> builder.append("", 0);
>- AtomicString atomicString = builder.toAtomicString();
>- ASSERT_EQ(emptyAtom(), atomicString);
>+ AtomString atomString = builder.toAtomString();
>+ ASSERT_EQ(emptyAtom(), atomString);
> }
> { // Cleared StringBuilder.
> StringBuilder builder;
> builder.appendLiteral("WebKit");
> builder.clear();
>- AtomicString atomicString = builder.toAtomicString();
>- ASSERT_EQ(emptyAtom(), atomicString);
>+ AtomString atomString = builder.toAtomString();
>+ ASSERT_EQ(emptyAtom(), atomString);
> }
> }
> 
>diff --git a/Tools/TestWebKitAPI/Tests/WTF/StringImpl.cpp b/Tools/TestWebKitAPI/Tests/WTF/StringImpl.cpp
>index 04f9382cd70ed1ba8c05fb8052703ac3b3082bae..c0196e47818767337fc20a6c57c6f11c0b1b8481 100644
>--- a/Tools/TestWebKitAPI/Tests/WTF/StringImpl.cpp
>+++ b/Tools/TestWebKitAPI/Tests/WTF/StringImpl.cpp
>@@ -57,14 +57,14 @@ TEST(WTF, StringImplCreationFromLiteral)
> ASSERT_EQ(stringWithoutLengthLiteral, reinterpret_cast<const char*>(programmaticStringNoLength->characters8()));
> ASSERT_TRUE(programmaticStringNoLength->is8Bit());
> 
>- // AtomicStringImpl from createFromLiteral should use the same underlying string.
>- auto atomicStringWithTemplate = AtomicStringImpl::add(stringWithTemplate.ptr());
>- ASSERT_TRUE(atomicStringWithTemplate->is8Bit());
>- ASSERT_EQ(atomicStringWithTemplate->characters8(), stringWithTemplate->characters8());
>- auto atomicProgrammaticString = AtomicStringImpl::add(programmaticString.ptr());
>+ // AtomStringImpl from createFromLiteral should use the same underlying string.
>+ auto atomStringWithTemplate = AtomStringImpl::add(stringWithTemplate.ptr());
>+ ASSERT_TRUE(atomStringWithTemplate->is8Bit());
>+ ASSERT_EQ(atomStringWithTemplate->characters8(), stringWithTemplate->characters8());
>+ auto atomicProgrammaticString = AtomStringImpl::add(programmaticString.ptr());
> ASSERT_TRUE(atomicProgrammaticString->is8Bit());
> ASSERT_EQ(atomicProgrammaticString->characters8(), programmaticString->characters8());
>- auto atomicProgrammaticStringNoLength = AtomicStringImpl::add(programmaticStringNoLength.ptr());
>+ auto atomicProgrammaticStringNoLength = AtomStringImpl::add(programmaticStringNoLength.ptr());
> ASSERT_TRUE(atomicProgrammaticStringNoLength->is8Bit());
> ASSERT_EQ(atomicProgrammaticStringNoLength->characters8(), programmaticStringNoLength->characters8());
> }
>@@ -533,7 +533,7 @@ TEST(WTF, StringImplCreateNullSymbol)
> ASSERT_TRUE(reference->isSymbol());
> ASSERT_FALSE(reference->isPrivate());
> ASSERT_TRUE(reference->isNullSymbol());
>- ASSERT_FALSE(reference->isAtomic());
>+ ASSERT_FALSE(reference->isAtom());
> ASSERT_EQ(0u, reference->length());
> ASSERT_TRUE(equal(reference.ptr(), ""));
> }
>@@ -545,9 +545,9 @@ TEST(WTF, StringImplCreateSymbol)
> ASSERT_TRUE(reference->isSymbol());
> ASSERT_FALSE(reference->isPrivate());
> ASSERT_FALSE(reference->isNullSymbol());
>- ASSERT_FALSE(reference->isAtomic());
>+ ASSERT_FALSE(reference->isAtom());
> ASSERT_FALSE(original->isSymbol());
>- ASSERT_FALSE(original->isAtomic());
>+ ASSERT_FALSE(original->isAtom());
> ASSERT_EQ(original->length(), reference->length());
> ASSERT_TRUE(equal(reference.ptr(), "original"));
> 
>@@ -556,9 +556,9 @@ TEST(WTF, StringImplCreateSymbol)
> ASSERT_TRUE(emptyReference->isSymbol());
> ASSERT_FALSE(emptyReference->isPrivate());
> ASSERT_FALSE(emptyReference->isNullSymbol());
>- ASSERT_FALSE(emptyReference->isAtomic());
>+ ASSERT_FALSE(emptyReference->isAtom());
> ASSERT_FALSE(empty->isSymbol());
>- ASSERT_TRUE(empty->isAtomic());
>+ ASSERT_TRUE(empty->isAtom());
> ASSERT_EQ(empty->length(), emptyReference->length());
> ASSERT_TRUE(equal(emptyReference.ptr(), ""));
> }
>@@ -570,9 +570,9 @@ TEST(WTF, StringImplCreatePrivateSymbol)
> ASSERT_TRUE(reference->isSymbol());
> ASSERT_TRUE(reference->isPrivate());
> ASSERT_FALSE(reference->isNullSymbol());
>- ASSERT_FALSE(reference->isAtomic());
>+ ASSERT_FALSE(reference->isAtom());
> ASSERT_FALSE(original->isSymbol());
>- ASSERT_FALSE(original->isAtomic());
>+ ASSERT_FALSE(original->isAtom());
> ASSERT_EQ(original->length(), reference->length());
> ASSERT_TRUE(equal(reference.ptr(), "original"));
> 
>@@ -581,80 +581,80 @@ TEST(WTF, StringImplCreatePrivateSymbol)
> ASSERT_TRUE(emptyReference->isSymbol());
> ASSERT_TRUE(emptyReference->isPrivate());
> ASSERT_FALSE(emptyReference->isNullSymbol());
>- ASSERT_FALSE(emptyReference->isAtomic());
>+ ASSERT_FALSE(emptyReference->isAtom());
> ASSERT_FALSE(empty->isSymbol());
>- ASSERT_TRUE(empty->isAtomic());
>+ ASSERT_TRUE(empty->isAtom());
> ASSERT_EQ(empty->length(), emptyReference->length());
> ASSERT_TRUE(equal(emptyReference.ptr(), ""));
> }
> 
>-TEST(WTF, StringImplSymbolToAtomicString)
>+TEST(WTF, StringImplSymbolToAtomString)
> {
> auto original = stringFromUTF8("original");
> auto reference = SymbolImpl::create(original);
> ASSERT_TRUE(reference->isSymbol());
> ASSERT_FALSE(reference->isPrivate());
>- ASSERT_FALSE(reference->isAtomic());
>+ ASSERT_FALSE(reference->isAtom());
> 
>- auto result = AtomicStringImpl::lookUp(reference.ptr());
>+ auto result = AtomStringImpl::lookUp(reference.ptr());
> ASSERT_FALSE(result);
> 
>- auto atomic = AtomicStringImpl::add(reference.ptr());
>- ASSERT_TRUE(atomic->isAtomic());
>+ auto atomic = AtomStringImpl::add(reference.ptr());
>+ ASSERT_TRUE(atomic->isAtom());
> ASSERT_FALSE(atomic->isSymbol());
> ASSERT_TRUE(reference->isSymbol());
>- ASSERT_FALSE(reference->isAtomic());
>+ ASSERT_FALSE(reference->isAtom());
> 
>- auto result2 = AtomicStringImpl::lookUp(reference.ptr());
>+ auto result2 = AtomStringImpl::lookUp(reference.ptr());
> ASSERT_TRUE(result2);
> }
> 
>-TEST(WTF, StringImplNullSymbolToAtomicString)
>+TEST(WTF, StringImplNullSymbolToAtomString)
> {
> auto reference = SymbolImpl::createNullSymbol();
> ASSERT_TRUE(reference->isSymbol());
> ASSERT_FALSE(reference->isPrivate());
>- ASSERT_FALSE(reference->isAtomic());
>+ ASSERT_FALSE(reference->isAtom());
> 
> // Because the substring of the reference is the empty string which is already interned.
>- auto result = AtomicStringImpl::lookUp(reference.ptr());
>+ auto result = AtomStringImpl::lookUp(reference.ptr());
> ASSERT_TRUE(result);
> 
>- auto atomic = AtomicStringImpl::add(reference.ptr());
>- ASSERT_TRUE(atomic->isAtomic());
>+ auto atomic = AtomStringImpl::add(reference.ptr());
>+ ASSERT_TRUE(atomic->isAtom());
> ASSERT_FALSE(atomic->isSymbol());
> ASSERT_TRUE(reference->isSymbol());
>- ASSERT_FALSE(reference->isAtomic());
>+ ASSERT_FALSE(reference->isAtom());
> ASSERT_EQ(atomic.get(), StringImpl::empty());
> 
>- auto result2 = AtomicStringImpl::lookUp(reference.ptr());
>+ auto result2 = AtomStringImpl::lookUp(reference.ptr());
> ASSERT_TRUE(result2);
> }
> 
> static StringImpl::StaticStringImpl staticString {"Cocoa"};
> 
>-TEST(WTF, StringImplStaticToAtomicString)
>+TEST(WTF, StringImplStaticToAtomString)
> {
> StringImpl& original = staticString;
> ASSERT_FALSE(original.isSymbol());
>- ASSERT_FALSE(original.isAtomic());
>+ ASSERT_FALSE(original.isAtom());
> ASSERT_TRUE(original.isStatic());
> 
>- auto result = AtomicStringImpl::lookUp(&original);
>+ auto result = AtomStringImpl::lookUp(&original);
> ASSERT_FALSE(result);
> 
>- auto atomic = AtomicStringImpl::add(&original);
>- ASSERT_TRUE(atomic->isAtomic());
>+ auto atomic = AtomStringImpl::add(&original);
>+ ASSERT_TRUE(atomic->isAtom());
> ASSERT_FALSE(atomic->isSymbol());
> ASSERT_FALSE(atomic->isStatic());
> ASSERT_FALSE(original.isSymbol());
>- ASSERT_FALSE(original.isAtomic());
>+ ASSERT_FALSE(original.isAtom());
> ASSERT_TRUE(original.isStatic());
> 
> ASSERT_TRUE(atomic->is8Bit());
> ASSERT_EQ(atomic->characters8(), original.characters8());
> 
>- auto result2 = AtomicStringImpl::lookUp(&original);
>+ auto result2 = AtomStringImpl::lookUp(&original);
> ASSERT_TRUE(result2);
> ASSERT_EQ(atomic, result2);
> }
>@@ -752,7 +752,7 @@ TEST(WTF, ExternalStringImplCreate8bit)
> ASSERT_TRUE(external->isExternal());
> ASSERT_TRUE(external->is8Bit());
> ASSERT_FALSE(external->isSymbol());
>- ASSERT_FALSE(external->isAtomic());
>+ ASSERT_FALSE(external->isAtom());
> ASSERT_EQ(external->length(), bufferStringLength);
> ASSERT_EQ(external->characters8(), buffer);
> }
>@@ -774,7 +774,7 @@ TEST(WTF, ExternalStringImplCreate16bit)
> ASSERT_TRUE(external->isExternal());
> ASSERT_FALSE(external->is8Bit());
> ASSERT_FALSE(external->isSymbol());
>- ASSERT_FALSE(external->isAtomic());
>+ ASSERT_FALSE(external->isAtom());
> ASSERT_EQ(external->length(), bufferStringLength);
> ASSERT_EQ(external->characters16(), buffer);
> }
>@@ -801,24 +801,24 @@ TEST(WTF, ExternalStringAtomic)
> }); 
> 
> ASSERT_TRUE(external->isExternal());
>- ASSERT_FALSE(external->isAtomic());
>+ ASSERT_FALSE(external->isAtom());
> ASSERT_FALSE(external->isSymbol());
> ASSERT_TRUE(external->is8Bit());
> ASSERT_EQ(external->length(), bufferStringLength);
> ASSERT_EQ(external->characters8(), buffer);
> 
>- auto result = AtomicStringImpl::lookUp(external.ptr());
>+ auto result = AtomStringImpl::lookUp(external.ptr());
> ASSERT_FALSE(result);
> 
>- auto atomic = AtomicStringImpl::add(external.ptr());
>+ auto atomic = AtomStringImpl::add(external.ptr());
> ASSERT_TRUE(atomic->isExternal());
>- ASSERT_TRUE(atomic->isAtomic());
>+ ASSERT_TRUE(atomic->isAtom());
> ASSERT_FALSE(atomic->isSymbol());
> ASSERT_TRUE(atomic->is8Bit());
> ASSERT_EQ(atomic->length(), external->length());
> ASSERT_EQ(atomic->characters8(), external->characters8());
> 
>- auto result2 = AtomicStringImpl::lookUp(external.ptr());
>+ auto result2 = AtomStringImpl::lookUp(external.ptr());
> ASSERT_TRUE(result2);
> ASSERT_EQ(atomic, result2);
> }
>@@ -839,12 +839,12 @@ TEST(WTF, ExternalStringToSymbol)
> 
> ASSERT_TRUE(external->isExternal());
> ASSERT_FALSE(external->isSymbol());
>- ASSERT_FALSE(external->isAtomic());
>+ ASSERT_FALSE(external->isAtom());
> 
> auto symbol = SymbolImpl::create(external);
> ASSERT_FALSE(symbol->isExternal());
> ASSERT_TRUE(symbol->isSymbol());
>- ASSERT_FALSE(symbol->isAtomic());
>+ ASSERT_FALSE(symbol->isAtom());
> ASSERT_FALSE(symbol->isPrivate());
> ASSERT_FALSE(symbol->isNullSymbol());
> ASSERT_EQ(external->length(), symbol->length());
>diff --git a/Tools/TestWebKitAPI/Tests/WTF/StringOperators.cpp b/Tools/TestWebKitAPI/Tests/WTF/StringOperators.cpp
>index 0e3bf98f88214fc47c9b5335f74b06d3e53a296d..4b927a8c9b633c0bbd8836e267088ffdc7cf2ccc 100644
>--- a/Tools/TestWebKitAPI/Tests/WTF/StringOperators.cpp
>+++ b/Tools/TestWebKitAPI/Tests/WTF/StringOperators.cpp
>@@ -45,7 +45,7 @@ namespace TestWebKitAPI {
> TEST(WTF, StringOperators)
> {
> String string("String");
>- AtomicString atomicString("AtomicString");
>+ AtomString atomString("AtomString");
> ASCIILiteral literal { "ASCIILiteral"_s };
> 
> String stringViewBacking { "StringView" };
>@@ -54,25 +54,25 @@ TEST(WTF, StringOperators)
> EXPECT_EQ(0, wtfStringCopyCount);
> 
> EXPECT_N_WTF_STRING_COPIES(2, string + string);
>- EXPECT_N_WTF_STRING_COPIES(2, string + atomicString);
>- EXPECT_N_WTF_STRING_COPIES(2, atomicString + string);
>- EXPECT_N_WTF_STRING_COPIES(2, atomicString + atomicString);
>+ EXPECT_N_WTF_STRING_COPIES(2, string + atomString);
>+ EXPECT_N_WTF_STRING_COPIES(2, atomString + string);
>+ EXPECT_N_WTF_STRING_COPIES(2, atomString + atomString);
> EXPECT_N_WTF_STRING_COPIES(1, stringView + string);
> EXPECT_N_WTF_STRING_COPIES(1, string + stringView);
>- EXPECT_N_WTF_STRING_COPIES(1, stringView + atomicString);
>- EXPECT_N_WTF_STRING_COPIES(1, atomicString + stringView);
>+ EXPECT_N_WTF_STRING_COPIES(1, stringView + atomString);
>+ EXPECT_N_WTF_STRING_COPIES(1, atomString + stringView);
> 
> EXPECT_N_WTF_STRING_COPIES(1, "C string" + string);
> EXPECT_N_WTF_STRING_COPIES(1, string + "C string");
>- EXPECT_N_WTF_STRING_COPIES(1, "C string" + atomicString);
>- EXPECT_N_WTF_STRING_COPIES(1, atomicString + "C string");
>+ EXPECT_N_WTF_STRING_COPIES(1, "C string" + atomString);
>+ EXPECT_N_WTF_STRING_COPIES(1, atomString + "C string");
> EXPECT_N_WTF_STRING_COPIES(0, "C string" + stringView);
> EXPECT_N_WTF_STRING_COPIES(0, stringView + "C string");
> 
> EXPECT_N_WTF_STRING_COPIES(1, literal + string);
> EXPECT_N_WTF_STRING_COPIES(1, string + literal);
>- EXPECT_N_WTF_STRING_COPIES(1, literal + atomicString);
>- EXPECT_N_WTF_STRING_COPIES(1, atomicString + literal);
>+ EXPECT_N_WTF_STRING_COPIES(1, literal + atomString);
>+ EXPECT_N_WTF_STRING_COPIES(1, atomString + literal);
> EXPECT_N_WTF_STRING_COPIES(0, literal + stringView);
> EXPECT_N_WTF_STRING_COPIES(0, stringView + literal);
> 
>@@ -97,12 +97,12 @@ TEST(WTF, StringOperators)
> EXPECT_N_WTF_STRING_COPIES(2, "C string" + (string + literal + string));
> EXPECT_N_WTF_STRING_COPIES(2, ("C string" + string) + (literal + string));
> 
>- EXPECT_N_WTF_STRING_COPIES(2, literal + atomicString + "C string" + atomicString);
>- EXPECT_N_WTF_STRING_COPIES(2, literal + (atomicString + "C string" + atomicString));
>- EXPECT_N_WTF_STRING_COPIES(2, (literal + atomicString) + ("C string" + atomicString));
>- EXPECT_N_WTF_STRING_COPIES(2, "C string" + atomicString + literal + atomicString);
>- EXPECT_N_WTF_STRING_COPIES(2, "C string" + (atomicString + literal + atomicString));
>- EXPECT_N_WTF_STRING_COPIES(2, ("C string" + atomicString) + (literal + atomicString));
>+ EXPECT_N_WTF_STRING_COPIES(2, literal + atomString + "C string" + atomString);
>+ EXPECT_N_WTF_STRING_COPIES(2, literal + (atomString + "C string" + atomString));
>+ EXPECT_N_WTF_STRING_COPIES(2, (literal + atomString) + ("C string" + atomString));
>+ EXPECT_N_WTF_STRING_COPIES(2, "C string" + atomString + literal + atomString);
>+ EXPECT_N_WTF_STRING_COPIES(2, "C string" + (atomString + literal + atomString));
>+ EXPECT_N_WTF_STRING_COPIES(2, ("C string" + atomString) + (literal + atomString));
> 
> EXPECT_N_WTF_STRING_COPIES(0, literal + stringView + "C string" + stringView);
> EXPECT_N_WTF_STRING_COPIES(0, literal + (stringView + "C string" + stringView));
>@@ -111,145 +111,145 @@ TEST(WTF, StringOperators)
> EXPECT_N_WTF_STRING_COPIES(0, "C string" + (stringView + literal + stringView));
> EXPECT_N_WTF_STRING_COPIES(0, ("C string" + stringView) + (literal + stringView));
> 
>- EXPECT_N_WTF_STRING_COPIES(2, literal + atomicString + "C string" + string + literal + stringView);
>- EXPECT_N_WTF_STRING_COPIES(2, literal + (atomicString + "C string" + string + literal + stringView));
>- EXPECT_N_WTF_STRING_COPIES(2, (literal + atomicString) + ("C string" + string) + (literal + stringView));
>- EXPECT_N_WTF_STRING_COPIES(2, "C string" + atomicString + literal + string + literal + stringView);
>- EXPECT_N_WTF_STRING_COPIES(2, "C string" + (atomicString + literal + string + literal + stringView));
>- EXPECT_N_WTF_STRING_COPIES(2, ("C string" + atomicString) + (literal + string) + (literal + stringView));
>-
>- EXPECT_N_WTF_STRING_COPIES(2, literal + atomicString + "C string" + stringView + literal + string);
>- EXPECT_N_WTF_STRING_COPIES(2, literal + (atomicString + "C string" + stringView + literal + string));
>- EXPECT_N_WTF_STRING_COPIES(2, (literal + atomicString) + ("C string" + stringView) + (literal + string));
>- EXPECT_N_WTF_STRING_COPIES(2, "C string" + atomicString + literal + stringView + literal + string);
>- EXPECT_N_WTF_STRING_COPIES(2, "C string" + (atomicString + literal + stringView + literal + string));
>- EXPECT_N_WTF_STRING_COPIES(2, ("C string" + atomicString) + (literal + stringView) + (literal + string));
>-
>- EXPECT_N_WTF_STRING_COPIES(2, literal + string + "C string" + atomicString + literal + stringView);
>- EXPECT_N_WTF_STRING_COPIES(2, literal + (string + "C string" + atomicString + literal + stringView));
>- EXPECT_N_WTF_STRING_COPIES(2, (literal + string) + ("C string" + atomicString) + (literal + stringView));
>- EXPECT_N_WTF_STRING_COPIES(2, "C string" + string + literal + atomicString + literal + stringView);
>- EXPECT_N_WTF_STRING_COPIES(2, "C string" + (string + literal + atomicString + literal + stringView));
>- EXPECT_N_WTF_STRING_COPIES(2, ("C string" + string) + (literal + atomicString) + (literal + stringView));
>-
>- EXPECT_N_WTF_STRING_COPIES(2, literal + string + "C string" + stringView + literal + atomicString);
>- EXPECT_N_WTF_STRING_COPIES(2, literal + (string + "C string" + stringView + literal + atomicString));
>- EXPECT_N_WTF_STRING_COPIES(2, (literal + string) + ("C string" + stringView) + (literal + atomicString));
>- EXPECT_N_WTF_STRING_COPIES(2, "C string" + string + literal + stringView + literal + atomicString);
>- EXPECT_N_WTF_STRING_COPIES(2, "C string" + (string + literal + stringView + literal + atomicString));
>- EXPECT_N_WTF_STRING_COPIES(2, ("C string" + string) + (literal + stringView) + (literal + atomicString));
>-
>- EXPECT_N_WTF_STRING_COPIES(2, literal + stringView + "C string" + atomicString + literal + string);
>- EXPECT_N_WTF_STRING_COPIES(2, literal + (stringView + "C string" + atomicString + literal + string));
>- EXPECT_N_WTF_STRING_COPIES(2, (literal + stringView) + ("C string" + atomicString) + (literal + string));
>- EXPECT_N_WTF_STRING_COPIES(2, "C string" + stringView + literal + atomicString + literal + string);
>- EXPECT_N_WTF_STRING_COPIES(2, "C string" + (stringView + literal + atomicString + literal + string));
>- EXPECT_N_WTF_STRING_COPIES(2, ("C string" + stringView) + (literal + atomicString) + (literal + string));
>-
>- EXPECT_N_WTF_STRING_COPIES(2, literal + stringView + "C string" + string + literal + atomicString);
>- EXPECT_N_WTF_STRING_COPIES(2, literal + (stringView + "C string" + string + literal + atomicString));
>- EXPECT_N_WTF_STRING_COPIES(2, (literal + stringView) + ("C string" + string) + (literal + atomicString));
>- EXPECT_N_WTF_STRING_COPIES(2, "C string" + stringView + literal + string + literal + atomicString);
>- EXPECT_N_WTF_STRING_COPIES(2, "C string" + (stringView + literal + string + literal + atomicString));
>- EXPECT_N_WTF_STRING_COPIES(2, ("C string" + stringView) + (literal + string) + (literal + atomicString));
>-
>- EXPECT_N_WTF_STRING_COPIES(2, "C string" + atomicString + "C string" + atomicString);
>- EXPECT_N_WTF_STRING_COPIES(2, "C string" + (atomicString + "C string" + atomicString));
>- EXPECT_N_WTF_STRING_COPIES(2, ("C string" + atomicString) + ("C string" + atomicString));
>- EXPECT_N_WTF_STRING_COPIES(2, atomicString + "C string" + atomicString + "C string");
>- EXPECT_N_WTF_STRING_COPIES(2, atomicString + ("C string" + atomicString + "C string"));
>- EXPECT_N_WTF_STRING_COPIES(2, (atomicString + "C string") + (atomicString + "C string"));
>-
>- EXPECT_N_WTF_STRING_COPIES(2, literal + atomicString + literal + atomicString);
>- EXPECT_N_WTF_STRING_COPIES(2, literal + (atomicString + literal + atomicString));
>- EXPECT_N_WTF_STRING_COPIES(2, (literal + atomicString) + (literal + atomicString));
>- EXPECT_N_WTF_STRING_COPIES(2, atomicString + literal + atomicString + literal);
>- EXPECT_N_WTF_STRING_COPIES(2, atomicString + (literal + atomicString + literal));
>- EXPECT_N_WTF_STRING_COPIES(2, (atomicString + literal) + (atomicString + literal));
>-
>- EXPECT_N_WTF_STRING_COPIES(2, "C string" + string + "C string" + atomicString + "C string" + stringView);
>- EXPECT_N_WTF_STRING_COPIES(2, "C string" + (string + "C string" + atomicString + "C string" + stringView));
>- EXPECT_N_WTF_STRING_COPIES(2, ("C string" + string) + ("C string" + atomicString) + ("C string" + stringView));
>- EXPECT_N_WTF_STRING_COPIES(2, string + "C string" + atomicString + "C string" + stringView + "C string");
>- EXPECT_N_WTF_STRING_COPIES(2, string + ("C string" + atomicString + "C string" + stringView + "C string"));
>- EXPECT_N_WTF_STRING_COPIES(2, (string + "C string") + (atomicString + "C string") + (stringView + "C string"));
>-
>- EXPECT_N_WTF_STRING_COPIES(2, literal + string + literal + atomicString + literal + stringView);
>- EXPECT_N_WTF_STRING_COPIES(2, literal + (string + literal + atomicString + literal + stringView));
>- EXPECT_N_WTF_STRING_COPIES(2, (literal + string) + (literal + atomicString) + (literal + stringView));
>- EXPECT_N_WTF_STRING_COPIES(2, string + literal + atomicString + literal + stringView + literal);
>- EXPECT_N_WTF_STRING_COPIES(2, string + (literal + atomicString + literal + stringView + literal));
>- EXPECT_N_WTF_STRING_COPIES(2, (string + literal) + (atomicString + literal) + (stringView + literal));
>-
>- EXPECT_N_WTF_STRING_COPIES(2, "C string" + string + "C string" + stringView + "C string" + atomicString);
>- EXPECT_N_WTF_STRING_COPIES(2, "C string" + (string + "C string" + stringView + "C string" + atomicString));
>- EXPECT_N_WTF_STRING_COPIES(2, ("C string" + string) + ("C string" + stringView) + ("C string" + atomicString));
>- EXPECT_N_WTF_STRING_COPIES(2, string + "C string" + stringView + "C string" + atomicString + "C string");
>- EXPECT_N_WTF_STRING_COPIES(2, string + ("C string" + stringView + "C string" + atomicString + "C string"));
>- EXPECT_N_WTF_STRING_COPIES(2, (string + "C string") + (stringView + "C string") + (atomicString + "C string"));
>-
>- EXPECT_N_WTF_STRING_COPIES(2, literal + string + literal + stringView + literal + atomicString);
>- EXPECT_N_WTF_STRING_COPIES(2, literal + (string + literal + stringView + literal + atomicString));
>- EXPECT_N_WTF_STRING_COPIES(2, (literal + string) + (literal + stringView) + (literal + atomicString));
>- EXPECT_N_WTF_STRING_COPIES(2, string + literal + stringView + literal + atomicString + literal);
>- EXPECT_N_WTF_STRING_COPIES(2, string + (literal + stringView + literal + atomicString + literal));
>- EXPECT_N_WTF_STRING_COPIES(2, (string + literal) + (stringView + literal) + (atomicString + literal));
>-
>- EXPECT_N_WTF_STRING_COPIES(2, "C string" + atomicString + "C string" + string + "C string" + stringView);
>- EXPECT_N_WTF_STRING_COPIES(2, "C string" + (atomicString + "C string" + string + "C string" + stringView));
>- EXPECT_N_WTF_STRING_COPIES(2, ("C string" + atomicString) + ("C string" + string) + ("C string" + stringView));
>- EXPECT_N_WTF_STRING_COPIES(2, atomicString + "C string" + string + "C string" + stringView + "C string");
>- EXPECT_N_WTF_STRING_COPIES(2, atomicString + ("C string" + string + "C string" + stringView + "C string"));
>- EXPECT_N_WTF_STRING_COPIES(2, (atomicString + "C string") + (string + "C string") + (stringView + "C string"));
>-
>- EXPECT_N_WTF_STRING_COPIES(2, literal + atomicString + literal + string + literal + stringView);
>- EXPECT_N_WTF_STRING_COPIES(2, literal + (atomicString + literal + string + literal + stringView));
>- EXPECT_N_WTF_STRING_COPIES(2, (literal + atomicString) + (literal + string) + (literal + stringView));
>- EXPECT_N_WTF_STRING_COPIES(2, atomicString + literal + string + literal + stringView + literal);
>- EXPECT_N_WTF_STRING_COPIES(2, atomicString + (literal + string + literal + stringView + literal));
>- EXPECT_N_WTF_STRING_COPIES(2, (atomicString + literal) + (string + literal) + (stringView + literal));
>-
>- EXPECT_N_WTF_STRING_COPIES(2, "C string" + atomicString + "C string" + stringView + "C string" + string);
>- EXPECT_N_WTF_STRING_COPIES(2, "C string" + (atomicString + "C string" + stringView + "C string" + string));
>- EXPECT_N_WTF_STRING_COPIES(2, ("C string" + atomicString) + ("C string" + stringView) + ("C string" + string));
>- EXPECT_N_WTF_STRING_COPIES(2, atomicString + "C string" + stringView + "C string" + string + "C string");
>- EXPECT_N_WTF_STRING_COPIES(2, atomicString + ("C string" + stringView + "C string" + string + "C string"));
>- EXPECT_N_WTF_STRING_COPIES(2, (atomicString + "C string") + (stringView + "C string") + (string + "C string"));
>-
>- EXPECT_N_WTF_STRING_COPIES(2, literal + atomicString + literal + stringView + literal + string);
>- EXPECT_N_WTF_STRING_COPIES(2, literal + (atomicString + literal + stringView + literal + string));
>- EXPECT_N_WTF_STRING_COPIES(2, (literal + atomicString) + (literal + stringView) + (literal + string));
>- EXPECT_N_WTF_STRING_COPIES(2, atomicString + literal + stringView + literal + string + literal);
>- EXPECT_N_WTF_STRING_COPIES(2, atomicString + (literal + stringView + literal + string + literal));
>- EXPECT_N_WTF_STRING_COPIES(2, (atomicString + literal) + (stringView + literal) + (string + literal));
>-
>- EXPECT_N_WTF_STRING_COPIES(2, "C string" + stringView + "C string" + atomicString + "C string" + string);
>- EXPECT_N_WTF_STRING_COPIES(2, "C string" + (stringView + "C string" + atomicString + "C string" + string));
>- EXPECT_N_WTF_STRING_COPIES(2, ("C string" + stringView) + ("C string" + atomicString) + ("C string" + string));
>- EXPECT_N_WTF_STRING_COPIES(2, stringView + "C string" + atomicString + "C string" + string + "C string");
>- EXPECT_N_WTF_STRING_COPIES(2, stringView + ("C string" + atomicString + "C string" + string + "C string"));
>- EXPECT_N_WTF_STRING_COPIES(2, (stringView + "C string") + (atomicString + "C string") + (string + "C string"));
>-
>- EXPECT_N_WTF_STRING_COPIES(2, literal + stringView + literal + atomicString + literal + string);
>- EXPECT_N_WTF_STRING_COPIES(2, literal + (stringView + literal + atomicString + literal + string));
>- EXPECT_N_WTF_STRING_COPIES(2, (literal + stringView) + (literal + atomicString) + (literal + string));
>- EXPECT_N_WTF_STRING_COPIES(2, stringView + literal + atomicString + literal + string + literal);
>- EXPECT_N_WTF_STRING_COPIES(2, stringView + (literal + atomicString + literal + string + literal));
>- EXPECT_N_WTF_STRING_COPIES(2, (stringView + literal) + (atomicString + literal) + (string + literal));
>-
>- EXPECT_N_WTF_STRING_COPIES(2, "C string" + stringView + "C string" + string + "C string" + atomicString);
>- EXPECT_N_WTF_STRING_COPIES(2, "C string" + (stringView + "C string" + string + "C string" + atomicString));
>- EXPECT_N_WTF_STRING_COPIES(2, ("C string" + stringView) + ("C string" + string) + ("C string" + atomicString));
>- EXPECT_N_WTF_STRING_COPIES(2, stringView + "C string" + string + "C string" + atomicString + "C string");
>- EXPECT_N_WTF_STRING_COPIES(2, stringView + ("C string" + string + "C string" + atomicString + "C string"));
>- EXPECT_N_WTF_STRING_COPIES(2, (stringView + "C string") + (string + "C string") + (atomicString + "C string"));
>-
>- EXPECT_N_WTF_STRING_COPIES(2, literal + stringView + literal + string + literal + atomicString);
>- EXPECT_N_WTF_STRING_COPIES(2, literal + (stringView + literal + string + literal + atomicString));
>- EXPECT_N_WTF_STRING_COPIES(2, (literal + stringView) + (literal + string) + (literal + atomicString));
>- EXPECT_N_WTF_STRING_COPIES(2, stringView + literal + string + literal + atomicString + literal);
>- EXPECT_N_WTF_STRING_COPIES(2, stringView + (literal + string + literal + atomicString + literal));
>- EXPECT_N_WTF_STRING_COPIES(2, (stringView + literal) + (string + literal) + (atomicString + literal));
>+ EXPECT_N_WTF_STRING_COPIES(2, literal + atomString + "C string" + string + literal + stringView);
>+ EXPECT_N_WTF_STRING_COPIES(2, literal + (atomString + "C string" + string + literal + stringView));
>+ EXPECT_N_WTF_STRING_COPIES(2, (literal + atomString) + ("C string" + string) + (literal + stringView));
>+ EXPECT_N_WTF_STRING_COPIES(2, "C string" + atomString + literal + string + literal + stringView);
>+ EXPECT_N_WTF_STRING_COPIES(2, "C string" + (atomString + literal + string + literal + stringView));
>+ EXPECT_N_WTF_STRING_COPIES(2, ("C string" + atomString) + (literal + string) + (literal + stringView));
>+
>+ EXPECT_N_WTF_STRING_COPIES(2, literal + atomString + "C string" + stringView + literal + string);
>+ EXPECT_N_WTF_STRING_COPIES(2, literal + (atomString + "C string" + stringView + literal + string));
>+ EXPECT_N_WTF_STRING_COPIES(2, (literal + atomString) + ("C string" + stringView) + (literal + string));
>+ EXPECT_N_WTF_STRING_COPIES(2, "C string" + atomString + literal + stringView + literal + string);
>+ EXPECT_N_WTF_STRING_COPIES(2, "C string" + (atomString + literal + stringView + literal + string));
>+ EXPECT_N_WTF_STRING_COPIES(2, ("C string" + atomString) + (literal + stringView) + (literal + string));
>+
>+ EXPECT_N_WTF_STRING_COPIES(2, literal + string + "C string" + atomString + literal + stringView);
>+ EXPECT_N_WTF_STRING_COPIES(2, literal + (string + "C string" + atomString + literal + stringView));
>+ EXPECT_N_WTF_STRING_COPIES(2, (literal + string) + ("C string" + atomString) + (literal + stringView));
>+ EXPECT_N_WTF_STRING_COPIES(2, "C string" + string + literal + atomString + literal + stringView);
>+ EXPECT_N_WTF_STRING_COPIES(2, "C string" + (string + literal + atomString + literal + stringView));
>+ EXPECT_N_WTF_STRING_COPIES(2, ("C string" + string) + (literal + atomString) + (literal + stringView));
>+
>+ EXPECT_N_WTF_STRING_COPIES(2, literal + string + "C string" + stringView + literal + atomString);
>+ EXPECT_N_WTF_STRING_COPIES(2, literal + (string + "C string" + stringView + literal + atomString));
>+ EXPECT_N_WTF_STRING_COPIES(2, (literal + string) + ("C string" + stringView) + (literal + atomString));
>+ EXPECT_N_WTF_STRING_COPIES(2, "C string" + string + literal + stringView + literal + atomString);
>+ EXPECT_N_WTF_STRING_COPIES(2, "C string" + (string + literal + stringView + literal + atomString));
>+ EXPECT_N_WTF_STRING_COPIES(2, ("C string" + string) + (literal + stringView) + (literal + atomString));
>+
>+ EXPECT_N_WTF_STRING_COPIES(2, literal + stringView + "C string" + atomString + literal + string);
>+ EXPECT_N_WTF_STRING_COPIES(2, literal + (stringView + "C string" + atomString + literal + string));
>+ EXPECT_N_WTF_STRING_COPIES(2, (literal + stringView) + ("C string" + atomString) + (literal + string));
>+ EXPECT_N_WTF_STRING_COPIES(2, "C string" + stringView + literal + atomString + literal + string);
>+ EXPECT_N_WTF_STRING_COPIES(2, "C string" + (stringView + literal + atomString + literal + string));
>+ EXPECT_N_WTF_STRING_COPIES(2, ("C string" + stringView) + (literal + atomString) + (literal + string));
>+
>+ EXPECT_N_WTF_STRING_COPIES(2, literal + stringView + "C string" + string + literal + atomString);
>+ EXPECT_N_WTF_STRING_COPIES(2, literal + (stringView + "C string" + string + literal + atomString));
>+ EXPECT_N_WTF_STRING_COPIES(2, (literal + stringView) + ("C string" + string) + (literal + atomString));
>+ EXPECT_N_WTF_STRING_COPIES(2, "C string" + stringView + literal + string + literal + atomString);
>+ EXPECT_N_WTF_STRING_COPIES(2, "C string" + (stringView + literal + string + literal + atomString));
>+ EXPECT_N_WTF_STRING_COPIES(2, ("C string" + stringView) + (literal + string) + (literal + atomString));
>+
>+ EXPECT_N_WTF_STRING_COPIES(2, "C string" + atomString + "C string" + atomString);
>+ EXPECT_N_WTF_STRING_COPIES(2, "C string" + (atomString + "C string" + atomString));
>+ EXPECT_N_WTF_STRING_COPIES(2, ("C string" + atomString) + ("C string" + atomString));
>+ EXPECT_N_WTF_STRING_COPIES(2, atomString + "C string" + atomString + "C string");
>+ EXPECT_N_WTF_STRING_COPIES(2, atomString + ("C string" + atomString + "C string"));
>+ EXPECT_N_WTF_STRING_COPIES(2, (atomString + "C string") + (atomString + "C string"));
>+
>+ EXPECT_N_WTF_STRING_COPIES(2, literal + atomString + literal + atomString);
>+ EXPECT_N_WTF_STRING_COPIES(2, literal + (atomString + literal + atomString));
>+ EXPECT_N_WTF_STRING_COPIES(2, (literal + atomString) + (literal + atomString));
>+ EXPECT_N_WTF_STRING_COPIES(2, atomString + literal + atomString + literal);
>+ EXPECT_N_WTF_STRING_COPIES(2, atomString + (literal + atomString + literal));
>+ EXPECT_N_WTF_STRING_COPIES(2, (atomString + literal) + (atomString + literal));
>+
>+ EXPECT_N_WTF_STRING_COPIES(2, "C string" + string + "C string" + atomString + "C string" + stringView);
>+ EXPECT_N_WTF_STRING_COPIES(2, "C string" + (string + "C string" + atomString + "C string" + stringView));
>+ EXPECT_N_WTF_STRING_COPIES(2, ("C string" + string) + ("C string" + atomString) + ("C string" + stringView));
>+ EXPECT_N_WTF_STRING_COPIES(2, string + "C string" + atomString + "C string" + stringView + "C string");
>+ EXPECT_N_WTF_STRING_COPIES(2, string + ("C string" + atomString + "C string" + stringView + "C string"));
>+ EXPECT_N_WTF_STRING_COPIES(2, (string + "C string") + (atomString + "C string") + (stringView + "C string"));
>+
>+ EXPECT_N_WTF_STRING_COPIES(2, literal + string + literal + atomString + literal + stringView);
>+ EXPECT_N_WTF_STRING_COPIES(2, literal + (string + literal + atomString + literal + stringView));
>+ EXPECT_N_WTF_STRING_COPIES(2, (literal + string) + (literal + atomString) + (literal + stringView));
>+ EXPECT_N_WTF_STRING_COPIES(2, string + literal + atomString + literal + stringView + literal);
>+ EXPECT_N_WTF_STRING_COPIES(2, string + (literal + atomString + literal + stringView + literal));
>+ EXPECT_N_WTF_STRING_COPIES(2, (string + literal) + (atomString + literal) + (stringView + literal));
>+
>+ EXPECT_N_WTF_STRING_COPIES(2, "C string" + string + "C string" + stringView + "C string" + atomString);
>+ EXPECT_N_WTF_STRING_COPIES(2, "C string" + (string + "C string" + stringView + "C string" + atomString));
>+ EXPECT_N_WTF_STRING_COPIES(2, ("C string" + string) + ("C string" + stringView) + ("C string" + atomString));
>+ EXPECT_N_WTF_STRING_COPIES(2, string + "C string" + stringView + "C string" + atomString + "C string");
>+ EXPECT_N_WTF_STRING_COPIES(2, string + ("C string" + stringView + "C string" + atomString + "C string"));
>+ EXPECT_N_WTF_STRING_COPIES(2, (string + "C string") + (stringView + "C string") + (atomString + "C string"));
>+
>+ EXPECT_N_WTF_STRING_COPIES(2, literal + string + literal + stringView + literal + atomString);
>+ EXPECT_N_WTF_STRING_COPIES(2, literal + (string + literal + stringView + literal + atomString));
>+ EXPECT_N_WTF_STRING_COPIES(2, (literal + string) + (literal + stringView) + (literal + atomString));
>+ EXPECT_N_WTF_STRING_COPIES(2, string + literal + stringView + literal + atomString + literal);
>+ EXPECT_N_WTF_STRING_COPIES(2, string + (literal + stringView + literal + atomString + literal));
>+ EXPECT_N_WTF_STRING_COPIES(2, (string + literal) + (stringView + literal) + (atomString + literal));
>+
>+ EXPECT_N_WTF_STRING_COPIES(2, "C string" + atomString + "C string" + string + "C string" + stringView);
>+ EXPECT_N_WTF_STRING_COPIES(2, "C string" + (atomString + "C string" + string + "C string" + stringView));
>+ EXPECT_N_WTF_STRING_COPIES(2, ("C string" + atomString) + ("C string" + string) + ("C string" + stringView));
>+ EXPECT_N_WTF_STRING_COPIES(2, atomString + "C string" + string + "C string" + stringView + "C string");
>+ EXPECT_N_WTF_STRING_COPIES(2, atomString + ("C string" + string + "C string" + stringView + "C string"));
>+ EXPECT_N_WTF_STRING_COPIES(2, (atomString + "C string") + (string + "C string") + (stringView + "C string"));
>+
>+ EXPECT_N_WTF_STRING_COPIES(2, literal + atomString + literal + string + literal + stringView);
>+ EXPECT_N_WTF_STRING_COPIES(2, literal + (atomString + literal + string + literal + stringView));
>+ EXPECT_N_WTF_STRING_COPIES(2, (literal + atomString) + (literal + string) + (literal + stringView));
>+ EXPECT_N_WTF_STRING_COPIES(2, atomString + literal + string + literal + stringView + literal);
>+ EXPECT_N_WTF_STRING_COPIES(2, atomString + (literal + string + literal + stringView + literal));
>+ EXPECT_N_WTF_STRING_COPIES(2, (atomString + literal) + (string + literal) + (stringView + literal));
>+
>+ EXPECT_N_WTF_STRING_COPIES(2, "C string" + atomString + "C string" + stringView + "C string" + string);
>+ EXPECT_N_WTF_STRING_COPIES(2, "C string" + (atomString + "C string" + stringView + "C string" + string));
>+ EXPECT_N_WTF_STRING_COPIES(2, ("C string" + atomString) + ("C string" + stringView) + ("C string" + string));
>+ EXPECT_N_WTF_STRING_COPIES(2, atomString + "C string" + stringView + "C string" + string + "C string");
>+ EXPECT_N_WTF_STRING_COPIES(2, atomString + ("C string" + stringView + "C string" + string + "C string"));
>+ EXPECT_N_WTF_STRING_COPIES(2, (atomString + "C string") + (stringView + "C string") + (string + "C string"));
>+
>+ EXPECT_N_WTF_STRING_COPIES(2, literal + atomString + literal + stringView + literal + string);
>+ EXPECT_N_WTF_STRING_COPIES(2, literal + (atomString + literal + stringView + literal + string));
>+ EXPECT_N_WTF_STRING_COPIES(2, (literal + atomString) + (literal + stringView) + (literal + string));
>+ EXPECT_N_WTF_STRING_COPIES(2, atomString + literal + stringView + literal + string + literal);
>+ EXPECT_N_WTF_STRING_COPIES(2, atomString + (literal + stringView + literal + string + literal));
>+ EXPECT_N_WTF_STRING_COPIES(2, (atomString + literal) + (stringView + literal) + (string + literal));
>+
>+ EXPECT_N_WTF_STRING_COPIES(2, "C string" + stringView + "C string" + atomString + "C string" + string);
>+ EXPECT_N_WTF_STRING_COPIES(2, "C string" + (stringView + "C string" + atomString + "C string" + string));
>+ EXPECT_N_WTF_STRING_COPIES(2, ("C string" + stringView) + ("C string" + atomString) + ("C string" + string));
>+ EXPECT_N_WTF_STRING_COPIES(2, stringView + "C string" + atomString + "C string" + string + "C string");
>+ EXPECT_N_WTF_STRING_COPIES(2, stringView + ("C string" + atomString + "C string" + string + "C string"));
>+ EXPECT_N_WTF_STRING_COPIES(2, (stringView + "C string") + (atomString + "C string") + (string + "C string"));
>+
>+ EXPECT_N_WTF_STRING_COPIES(2, literal + stringView + literal + atomString + literal + string);
>+ EXPECT_N_WTF_STRING_COPIES(2, literal + (stringView + literal + atomString + literal + string));
>+ EXPECT_N_WTF_STRING_COPIES(2, (literal + stringView) + (literal + atomString) + (literal + string));
>+ EXPECT_N_WTF_STRING_COPIES(2, stringView + literal + atomString + literal + string + literal);
>+ EXPECT_N_WTF_STRING_COPIES(2, stringView + (literal + atomString + literal + string + literal));
>+ EXPECT_N_WTF_STRING_COPIES(2, (stringView + literal) + (atomString + literal) + (string + literal));
>+
>+ EXPECT_N_WTF_STRING_COPIES(2, "C string" + stringView + "C string" + string + "C string" + atomString);
>+ EXPECT_N_WTF_STRING_COPIES(2, "C string" + (stringView + "C string" + string + "C string" + atomString));
>+ EXPECT_N_WTF_STRING_COPIES(2, ("C string" + stringView) + ("C string" + string) + ("C string" + atomString));
>+ EXPECT_N_WTF_STRING_COPIES(2, stringView + "C string" + string + "C string" + atomString + "C string");
>+ EXPECT_N_WTF_STRING_COPIES(2, stringView + ("C string" + string + "C string" + atomString + "C string"));
>+ EXPECT_N_WTF_STRING_COPIES(2, (stringView + "C string") + (string + "C string") + (atomString + "C string"));
>+
>+ EXPECT_N_WTF_STRING_COPIES(2, literal + stringView + literal + string + literal + atomString);
>+ EXPECT_N_WTF_STRING_COPIES(2, literal + (stringView + literal + string + literal + atomString));
>+ EXPECT_N_WTF_STRING_COPIES(2, (literal + stringView) + (literal + string) + (literal + atomString));
>+ EXPECT_N_WTF_STRING_COPIES(2, stringView + literal + string + literal + atomString + literal);
>+ EXPECT_N_WTF_STRING_COPIES(2, stringView + (literal + string + literal + atomString + literal));
>+ EXPECT_N_WTF_STRING_COPIES(2, (stringView + literal) + (string + literal) + (atomString + literal));
> }
> 
> TEST(WTF, ConcatenateCharacterArrayAndEmptyString)
>diff --git a/Tools/TestWebKitAPI/Tests/WebCore/ContentExtensions.cpp b/Tools/TestWebKitAPI/Tests/WebCore/ContentExtensions.cpp
>index 6f915713c141c43b1c11b269b98ca67798d02a97..8e137a80477ff00be9b3592718a23f241693317e 100644
>--- a/Tools/TestWebKitAPI/Tests/WebCore/ContentExtensions.cpp
>+++ b/Tools/TestWebKitAPI/Tests/WebCore/ContentExtensions.cpp
>@@ -217,7 +217,7 @@ static ResourceLoadInfo subResourceRequest(const char* url, const char* mainDocu
> 
> ContentExtensions::ContentExtensionsBackend makeBackend(const char* json)
> {
>- AtomicString::init();
>+ AtomString::init();
> auto extension = InMemoryCompiledContentExtension::create(json);
> ContentExtensions::ContentExtensionsBackend backend;
> backend.addContentExtension("testFilter", WTFMove(extension));
>diff --git a/Tools/TestWebKitAPI/Tests/WebCore/FontCache.cpp b/Tools/TestWebKitAPI/Tests/WebCore/FontCache.cpp
>index 176b4a938d154b19b735281b5264bcf20719db36..7bab1c4e4633c787e5bdbabe46f32b349ea26ea1 100644
>--- a/Tools/TestWebKitAPI/Tests/WebCore/FontCache.cpp
>+++ b/Tools/TestWebKitAPI/Tests/WebCore/FontCache.cpp
>@@ -52,7 +52,7 @@ public:
> 
> static std::unique_ptr<FontPlatformData> createPlatformFont(const char* familyName, float weight, float italic, float stretch, float size)
> {
>- AtomicString familyNameString(familyName);
>+ AtomString familyNameString(familyName);
> FontCascadeDescription description;
> description.setOneFamily(familyNameString);
> description.setWeight(FontSelectionValue(weight));
>diff --git a/Tools/TestWebKitAPI/Tests/WebCore/Logging.cpp b/Tools/TestWebKitAPI/Tests/WebCore/Logging.cpp
>index 2c0af8bdca0778ec432cf47600cbb2a380cc5bd0..655f6cb1edb1e565309b3d568f2b3c1ab936a976 100644
>--- a/Tools/TestWebKitAPI/Tests/WebCore/Logging.cpp
>+++ b/Tools/TestWebKitAPI/Tests/WebCore/Logging.cpp
>@@ -319,10 +319,10 @@ TEST_F(LoggingTest, Logger)
> EXPECT_EQ(0u, output().length());
> 
> logger->setEnabled(this, true);
>- AtomicString string1("AtomicString", AtomicString::ConstructFromLiteral);
>- const AtomicString string2("const AtomicString", AtomicString::ConstructFromLiteral);
>+ AtomString string1("AtomString", AtomString::ConstructFromLiteral);
>+ const AtomString string2("const AtomString", AtomString::ConstructFromLiteral);
> logger->logAlways(TestChannel1, string1, " and ", string2);
>- EXPECT_TRUE(output().contains("AtomicString and const AtomicString", false));
>+ EXPECT_TRUE(output().contains("AtomString and const AtomString", false));
> 
> String string3("String");
> const String string4("const String");
>diff --git a/Tools/TestWebKitAPI/Tests/WebCore/SampleMap.cpp b/Tools/TestWebKitAPI/Tests/WebCore/SampleMap.cpp
>index c797f50f18101091ef2415bbdb4077917eff8123..dbeb3231e13bd50267c34a8ab56f4b9c560251f7 100644
>--- a/Tools/TestWebKitAPI/Tests/WebCore/SampleMap.cpp
>+++ b/Tools/TestWebKitAPI/Tests/WebCore/SampleMap.cpp
>@@ -56,7 +56,7 @@ public:
> MediaTime presentationTime() const final { return m_presentationTime; }
> MediaTime decodeTime() const final { return m_decodeTime; }
> MediaTime duration() const final { return m_duration; }
>- AtomicString trackID() const final { return m_trackID; }
>+ AtomString trackID() const final { return m_trackID; }
> void setTrackID(const String& trackID) final { m_trackID = trackID; }
> size_t sizeInBytes() const final { return m_sizeInBytes; }
> FloatSize presentationSize() const final { return m_presentationSize; }
>@@ -87,7 +87,7 @@ private:
> MediaTime m_decodeTime;
> MediaTime m_duration;
> FloatSize m_presentationSize;
>- AtomicString m_trackID;
>+ AtomString m_trackID;
> size_t m_sizeInBytes { 0 };
> SampleFlags m_flags { None };
> };
>diff --git a/Tools/TestWebKitAPI/TestsController.cpp b/Tools/TestWebKitAPI/TestsController.cpp
>index f227be4b6d081891d4c2521c38ccff45e97c81c9..a58e50e412b7734224bcf579a2e2dae55b4dc454 100644
>--- a/Tools/TestWebKitAPI/TestsController.cpp
>+++ b/Tools/TestWebKitAPI/TestsController.cpp
>@@ -29,7 +29,7 @@
> #include <wtf/MainThread.h>
> #include <wtf/ProcessPrivilege.h>
> #include <wtf/Threading.h>
>-#include <wtf/text/AtomicString.h>
>+#include <wtf/text/AtomString.h>
> 
> namespace TestWebKitAPI {
> 
>@@ -72,7 +72,7 @@ TestsController::TestsController()
> WTF::initializeThreading();
> WTF::initializeMainThread();
> WTF::setProcessPrivileges(allPrivileges());
>- AtomicString::init();
>+ AtomString::init();
> }
> 
> bool TestsController::run(int argc, char** argv)
>diff --git a/Tools/gdb/webkit.py b/Tools/gdb/webkit.py
>index 06de4281e3f33f9bc69e5be3e0a05a091a3a5c83..3ad5d4c861f24088279ccb2b608c6b97a3b1d4ec 100644
>--- a/Tools/gdb/webkit.py
>+++ b/Tools/gdb/webkit.py
>@@ -106,8 +106,8 @@ class LCharStringPrinter(StringPrinter):
> return lstring_to_string(self.val)
> 
> 
>-class WTFAtomicStringPrinter(StringPrinter):
>- "Print a WTF::AtomicString"
>+class WTFAtomStringPrinter(StringPrinter):
>+ "Print a WTF::AtomString"
> def to_string(self):
> return self.val['m_string']
> 
>@@ -294,7 +294,7 @@ class WTFVectorPrinter:
> def add_pretty_printers():
> pretty_printers = (
> (re.compile("^WTF::Vector<.*>$"), WTFVectorPrinter),
>- (re.compile("^WTF::AtomicString$"), WTFAtomicStringPrinter),
>+ (re.compile("^WTF::AtomString$"), WTFAtomStringPrinter),
> (re.compile("^WTF::CString$"), WTFCStringPrinter),
> (re.compile("^WTF::String$"), WTFStringPrinter),
> (re.compile("^WTF::StringImpl$"), WTFStringImplPrinter),
>diff --git a/Tools/lldb/lldb_webkit.py b/Tools/lldb/lldb_webkit.py
>index 8a6c9e47e2130d57b42dcb5784fbcc2aa989e4bb..dbe4f029e251545a2dca9d4cb71ec90c8be1f674 100644
>--- a/Tools/lldb/lldb_webkit.py
>+++ b/Tools/lldb/lldb_webkit.py
>@@ -59,7 +59,7 @@ def __lldb_init_module(debugger, dict):
> debugger.HandleCommand('type summary add --expand -F lldb_webkit.WTFString_SummaryProvider WTF::String')
> debugger.HandleCommand('type summary add --expand -F lldb_webkit.WTFStringImpl_SummaryProvider WTF::StringImpl')
> debugger.HandleCommand('type summary add --expand -F lldb_webkit.WTFStringView_SummaryProvider WTF::StringView')
>- debugger.HandleCommand('type summary add --expand -F lldb_webkit.WTFAtomicString_SummaryProvider WTF::AtomicString')
>+ debugger.HandleCommand('type summary add --expand -F lldb_webkit.WTFAtomString_SummaryProvider WTF::AtomString')
> debugger.HandleCommand('type summary add --expand -F lldb_webkit.WTFVector_SummaryProvider -x "^WTF::Vector<.+>$"')
> debugger.HandleCommand('type summary add --expand -F lldb_webkit.WTFHashTable_SummaryProvider -x "^WTF::HashTable<.+>$"')
> debugger.HandleCommand('type summary add --expand -F lldb_webkit.WTFHashMap_SummaryProvider -x "^WTF::HashMap<.+>$"')
>@@ -124,7 +124,7 @@ def WTFStringView_SummaryProvider(valobj, dict):
> return "{ length = %d, contents = '%s' }" % (provider.get_length(), provider.to_string())
> 
> 
>-def WTFAtomicString_SummaryProvider(valobj, dict):
>+def WTFAtomString_SummaryProvider(valobj, dict):
> return WTFString_SummaryProvider(valobj.GetChildMemberWithName('m_string'), dict)
> 
>

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Attachments on bug 195276: 372205