Attachment 356213 Details for Bug 192193 – Patch

[patch] Patch

bug-192193-20181130115155.patch (text/plain), 73.28 KB, created by Chris Dumez on 2018-11-30 11:51:55 PST

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Creator: Chris Dumez

Created: 2018-11-30 11:51:55 PST

Size: 73.28 KB

patch

obsolete

>Subversion Revision: 238614
>diff --git a/Source/WebCore/ChangeLog b/Source/WebCore/ChangeLog
>index 1f37acd62c1fde9ae11b177c7ec60412bd3c4de9..fecb58e9880e346053ffa82f7819d531623ccbf8 100644
>--- a/Source/WebCore/ChangeLog
>+++ b/Source/WebCore/ChangeLog
>@@ -1,3 +1,116 @@
>+2018-11-29  Chris Dumez  <cdumez@apple.com>
>+
>+        Add initial support for 'Cross-Origin-Opener-Policy' HTTP header
>+        https://bugs.webkit.org/show_bug.cgi?id=192193
>+        <rdar://problem/42013525>
>+
>+        Reviewed by NOBODY (OOPS!).
>+
>+        Add initial support for 'Cross-Origin-Opener-Policy' HTTP header as discussed in:
>+        - https://github.com/whatwg/html/issues/3740
>+
>+        Supported syntax is currently:
>+        Cross-Origin-Opener-Policy: [same-origin | same-site]
>+
>+        When navigating cross-origin (or cross-site) to a document that serves the
>+        'Cross-Origin-Opener-Policy: same-origin' (or 'same-site') header, we create
>+        a new browsing context group to isolate the frame. We do so by:
>+        - Disowning our opener
>+        - Have our openees disown us
>+        - Use a fresh ScriptController / WindowProxy so that existing wrappers keep pointing
>+          to the old window. (note that the old window will become frameless once we've created
>+          the window for the new document and the old window will look closed/frameless from
>+          JS).
>+
>+        Note that isolation can also happen for same-site navigations if the source and
>+        destination have a different Cross-Origin-Opener-Policy header.
>+
>+        In the future, this will allow us to process-swap on such navigation. However, this part
>+        is not implemented yet. For now, this does Web isolation but no process isolation.
>+
>+        Note that support for an additional 'unsafe-allow-outgoing' flag is being discussed upstream
>+        but is not implemented in this patch.
>+
>+        The feature is currently behind an experimental feature flag, off by default.
>+
>+        Test: http/tests/security/Cross-Origin-Opener-Policy/cross-origin-opener-policy-basic.html
>+
>+        * dom/Document.cpp:
>+        (WebCore::Document::initSecurityContext):
>+        Make sure document inherits crossOriginOpenerPolicy from its opener.
>+
>+        (WebCore::Document::crossOriginOpenerPolicy const):
>+        (WebCore::Document::setCrossOriginOpenerPolicy):
>+        * dom/Document.h:
>+        Save crossOriginOpenerPolicy on the document. This is needed to check for policy mismatch
>+        between source and destination when navigating.
>+
>+        * loader/CrossOriginAccessControl.cpp:
>+        (WebCore::isSameSiteURL):
>+        (WebCore::shouldCrossOriginResourcePolicyCancelLoad):
>+        * loader/CrossOriginAccessControl.h:
>+        Move same site check logic out of shouldCrossOriginResourcePolicyCancelLoad() and into
>+        isSameSiteURL() so that it can be reused.
>+
>+        * loader/DocumentLoader.cpp:
>+        (WebCore::DocumentLoader::responseReceived):
>+        When we receive the NetworkResponse, check if the Cross-Origin-Opener-Policy header
>+        is present and ask the FrameLoader to isolate us if necessary.
>+
>+        * loader/PolicyChecker.cpp:
>+        (WebCore::PolicyChecker::checkNavigationPolicy):
>+        * loader/FrameLoader.cpp:
>+        (WebCore::FrameLoader::loadURL):
>+        Move the updating of NavigationAction's openedViaWindowOpenWithOpener / HasOpenedFrames
>+        flags from FrameLoader::loadURL() to PolicyChecker::checkNavigationPolicy() since
>+        NavigationAction objects are created in multiple places and we were failing to set
>+        the flags in other places than loadURL(). This bug was found by one of my new API
>+        tests.
>+
>+        (WebCore::FrameLoader::isolateIfNecessaryDueToCrossOriginOpenerPolicy):
>+        (WebCore::FrameLoader::isolateFromOtherBrowsingContexts):
>+        Isolate the browsing context if directed by the Cross-Origin-Opener-Policy header by:
>+        - Disowning our opener
>+        - Have our openees disown us
>+        - Use a fresh ScriptController / WindowProxy so that existing wrappers keep pointing
>+          to the old window.
>+
>+        * loader/FrameLoader.h:
>+        (WebCore::FrameLoader::hasOpenedFrames const):
>+        Add getter to check if the frame has opened any other frames.
>+
>+        * page/DOMWindow.cpp:
>+        (WebCore::DOMWindow::createWindow):
>+        Pass new boolean to setOpenedViaWindowOpenWithOpener().
>+
>+        * page/AbstractFrame.cpp:
>+        (WebCore::AbstractFrame::resetWindowProxy):
>+        * page/Frame.cpp:
>+        (WebCore::Frame::resetScript):
>+        * page/Frame.h:
>+        Add resetScript() method to reconstruct the ScriptController / WindowProxy. This makes sure that
>+        we get a fresh ScriptController / WindowProxy for the frame when it is navigated and the
>+        'Cross-Origin-Opener-Policy' HTTP header causes isolation. Existing wrappers will keep pointing
>+        to the current window, which will become frameless once with create a window for the new
>+        document.
>+
>+        * page/Page.h:
>+        (WebCore::Page::setOpenedViaWindowOpenWithOpener):
>+        Have setter take a boolean so that the value can be reset.
>+
>+        * page/RuntimeEnabledFeatures.h:
>+        (WebCore::RuntimeEnabledFeatures::setCrossOriginOpenerPolicyEnabled):
>+        (WebCore::RuntimeEnabledFeatures::crossOriginOpenerPolicyEnabled const):
>+        Add RuntimeEnabledFeature for this header, off by default.
>+
>+        * platform/network/HTTPHeaderNames.in:
>+        Add Cross-Origin-Opener-Policy header.
>+
>+        * platform/network/HTTPParsers.cpp:
>+        (WebCore::parseCrossOriginOpenerPolicyHeader):
>+        * platform/network/HTTPParsers.h:
>+        Add utility function for parsing the 'Cross-Origin-Opener-Policy' HTTP header.
>+
> 2018-11-28  Zalan Bujtas  <zalan@apple.com>
> 
>         [LFC][Quirk] Use non-collapsed vertical margin values when the container is stretched to the size of the ICB.
>diff --git a/Source/WebKit/ChangeLog b/Source/WebKit/ChangeLog
>index 80a8fd4e246d464e3eb9ecf3769011d06b67e750..6b6f5746918fc9808567ffadd3f009b0efe95dc1 100644
>--- a/Source/WebKit/ChangeLog
>+++ b/Source/WebKit/ChangeLog
>@@ -1,3 +1,23 @@
>+2018-11-29  Chris Dumez  <cdumez@apple.com>
>+
>+        Add initial support for 'Cross-Origin-Opener-Policy' HTTP header
>+        https://bugs.webkit.org/show_bug.cgi?id=192193
>+        <rdar://problem/42013525>
>+
>+        Reviewed by NOBODY (OOPS!).
>+
>+        Add private API to turn on the feature.
>+
>+        * Shared/WebPreferences.yaml:
>+        * UIProcess/API/C/WKPreferences.cpp:
>+        (WKPreferencesGetCrossOriginOpenerPolicyEnabled):
>+        (WKPreferencesSetCrossOriginOpenerPolicyEnabled):
>+        * UIProcess/API/C/WKPreferencesRef.h:
>+        * UIProcess/API/Cocoa/WKPreferences.mm:
>+        (-[WKPreferences _setCrossOriginOpenerPolicyEnabled:]):
>+        (-[WKPreferences _crossOriginOpenerPolicyEnabled]):
>+        * UIProcess/API/Cocoa/WKPreferencesPrivate.h:
>+
> 2018-11-28  Alexey Proskuryakov  <ap@apple.com>
> 
>         Modernize version checks for same site cookie support
>diff --git a/Source/WebKitLegacy/mac/ChangeLog b/Source/WebKitLegacy/mac/ChangeLog
>index bf46902e7cf0e03fb3313360cabc0fa689bf0789..c249f67463478b1864e7cbfbbf80555dd0beb30c 100644
>--- a/Source/WebKitLegacy/mac/ChangeLog
>+++ b/Source/WebKitLegacy/mac/ChangeLog
>@@ -1,3 +1,22 @@
>+2018-11-29  Chris Dumez  <cdumez@apple.com>
>+
>+        Add initial support for 'Cross-Origin-Opener-Policy' HTTP header
>+        https://bugs.webkit.org/show_bug.cgi?id=192193
>+        <rdar://problem/42013525>
>+
>+        Reviewed by NOBODY (OOPS!).
>+
>+        Add private SPI to turn on the feature.
>+
>+        * WebView/WebPreferenceKeysPrivate.h:
>+        * WebView/WebPreferences.mm:
>+        (+[WebPreferences initialize]):
>+        (-[WebPreferences crossOriginOpenerPolicyEnabled]):
>+        (-[WebPreferences setCrossOriginOpenerPolicyEnabled:]):
>+        * WebView/WebPreferencesPrivate.h:
>+        * WebView/WebView.mm:
>+        (-[WebView _preferencesChanged:]):
>+
> 2018-11-27  Mark Lam  <mark.lam@apple.com>
> 
>         ENABLE_FAST_JIT_PERMISSIONS should be false for iosmac.
>diff --git a/Source/WebCore/dom/Document.cpp b/Source/WebCore/dom/Document.cpp
>index 5c2ff134910960b53920870c68a85d32860183ad..4720249de9d53f2e7761a353c17d92ab261ba4cf 100644
>--- a/Source/WebCore/dom/Document.cpp
>+++ b/Source/WebCore/dom/Document.cpp
>@@ -532,6 +532,7 @@ Document::Document(Frame* frame, const URL& url, unsigned documentClasses, unsig
>     , m_didAssociateFormControlsTimer(*this, &Document::didAssociateFormControlsTimerFired)
>     , m_cookieCacheExpiryTimer(*this, &Document::invalidateDOMCookieCache)
>     , m_socketProvider(page() ? &page()->socketProvider() : nullptr)
>+    , m_crossOriginOpenerPolicy(CrossOriginOpenerPolicy::None)
>     , m_isSynthesized(constructionFlags & Synthesized)
>     , m_isNonRenderedPlaceholder(constructionFlags & NonRenderedPlaceholder)
>     , m_orientationNotifier(currentOrientation(frame))
>@@ -5815,6 +5816,7 @@ void Document::initSecurityContext()
>     // We alias the SecurityOrigins to match Firefox, see Bug 15313
>     // https://bugs.webkit.org/show_bug.cgi?id=15313
>     setSecurityOriginPolicy(ownerFrame->document()->securityOriginPolicy());
>+    setCrossOriginOpenerPolicy(ownerFrame->document()->crossOriginOpenerPolicy());
> }
> 
> bool Document::shouldInheritContentSecurityPolicyFromOwner() const
>@@ -8478,4 +8480,14 @@ void Document::setPaintWorkletGlobalScope(Ref<PaintWorkletGlobalScope>&& scope)
> }
> #endif
> 
>+CrossOriginOpenerPolicy Document::crossOriginOpenerPolicy() const
>+{
>+    return m_crossOriginOpenerPolicy;
>+}
>+
>+void Document::setCrossOriginOpenerPolicy(CrossOriginOpenerPolicy policy)
>+{
>+    m_crossOriginOpenerPolicy = policy;
>+}
>+
> } // namespace WebCore
>diff --git a/Source/WebCore/dom/Document.h b/Source/WebCore/dom/Document.h
>index 559a5be63af393b25e90fb503549f2819e8a773e..1b5dcb707c620d12498ca0a06178c56c50fa021f 100644
>--- a/Source/WebCore/dom/Document.h
>+++ b/Source/WebCore/dom/Document.h
>@@ -206,6 +206,7 @@ enum CollectionType;
> enum class ShouldOpenExternalURLsPolicy : uint8_t;
> 
> enum class RouteSharingPolicy : uint8_t;
>+enum class CrossOriginOpenerPolicy;
> 
> using PlatformDisplayID = uint32_t;
> 
>@@ -1353,6 +1354,9 @@ public:
>     SecurityOrigin& securityOrigin() const { return *SecurityContext::securityOrigin(); }
>     SecurityOrigin& topOrigin() const final { return topDocument().securityOrigin(); }
> 
>+    CrossOriginOpenerPolicy crossOriginOpenerPolicy() const;
>+    void setCrossOriginOpenerPolicy(CrossOriginOpenerPolicy);
>+
>     Ref<FontFaceSet> fonts();
> 
>     void ensurePlugInsInjectedScript(DOMWrapperWorld&);
>@@ -1958,6 +1962,7 @@ private:
>     PageCacheState m_pageCacheState { NotInPageCache };
>     std::optional<ReferrerPolicy> m_referrerPolicy;
>     ReadyState m_readyState { Complete };
>+    CrossOriginOpenerPolicy m_crossOriginOpenerPolicy;
> 
>     MutationObserverOptions m_mutationObserverTypes { 0 };
> 
>diff --git a/Source/WebCore/loader/CrossOriginAccessControl.cpp b/Source/WebCore/loader/CrossOriginAccessControl.cpp
>index 0d26a1faac183574043faa7b4a9ec6d11180b817..87c26eb52501364aff6f7f3492d8c8f2117e45a0 100644
>--- a/Source/WebCore/loader/CrossOriginAccessControl.cpp
>+++ b/Source/WebCore/loader/CrossOriginAccessControl.cpp
>@@ -216,6 +216,17 @@ bool validatePreflightResponse(const ResourceRequest& request, const ResourceRes
>     return true;
> }
> 
>+bool isSameSiteURL(const SecurityOrigin& sourceOrigin, const URL& destinationURL)
>+{
>+    if (sourceOrigin.isUnique())
>+        return false;
>+    if (!registrableDomainsAreEqual(destinationURL, ResourceRequest::partitionName(sourceOrigin.host())))
>+        return false;
>+    if (sourceOrigin.protocol() == "http" && destinationURL.protocolIs("https"))
>+        return false;
>+    return true;
>+}
>+
> static inline bool shouldCrossOriginResourcePolicyCancelLoad(const SecurityOrigin& origin, const ResourceResponse& response)
> {
>     if (origin.canRequest(response.url()))
>@@ -227,13 +238,7 @@ static inline bool shouldCrossOriginResourcePolicyCancelLoad(const SecurityOrigi
>         return true;
> 
>     if (policy == CrossOriginResourcePolicy::SameSite) {
>-        if (origin.isUnique())
>-            return true;
>-#if ENABLE(PUBLIC_SUFFIX_LIST)
>-        if (!registrableDomainsAreEqual(response.url(), ResourceRequest::partitionName(origin.host())))
>-            return true;
>-#endif
>-        if (origin.protocol() == "http" && response.url().protocol() == "https")
>+        if (!isSameSiteURL(origin, response.url()))
>             return true;
>     }
> 
>diff --git a/Source/WebCore/loader/CrossOriginAccessControl.h b/Source/WebCore/loader/CrossOriginAccessControl.h
>index d2b09bd5db5676c01abf823d3f0722a770ea540b..949461709d469d832db55deeea0b99d06da366a1 100644
>--- a/Source/WebCore/loader/CrossOriginAccessControl.h
>+++ b/Source/WebCore/loader/CrossOriginAccessControl.h
>@@ -64,5 +64,6 @@ WEBCORE_EXPORT bool passesAccessControlCheck(const ResourceResponse&, StoredCred
> WEBCORE_EXPORT bool validatePreflightResponse(const ResourceRequest&, const ResourceResponse&, StoredCredentialsPolicy, SecurityOrigin&, String& errorDescription);
> 
> WEBCORE_EXPORT std::optional<ResourceError> validateCrossOriginResourcePolicy(const SecurityOrigin&, const URL&, const ResourceResponse&);
>+WEBCORE_EXPORT bool isSameSiteURL(const SecurityOrigin& sourceOrigin, const URL& destinationURL);
> 
> } // namespace WebCore
>diff --git a/Source/WebCore/loader/DocumentLoader.cpp b/Source/WebCore/loader/DocumentLoader.cpp
>index d851af0ee6ce8e2cbb124630efbd6056a02885b8..5b7fc765e80aea0aea7baa0ae0fb1c09925da1d9 100644
>--- a/Source/WebCore/loader/DocumentLoader.cpp
>+++ b/Source/WebCore/loader/DocumentLoader.cpp
>@@ -788,6 +788,9 @@ void DocumentLoader::responseReceived(const ResourceResponse& response, Completi
>         }
>     }
> 
>+    String crossOriginOpenerPolicy = response.httpHeaderFields().get(HTTPHeaderName::CrossOriginOpenerPolicy);
>+    frameLoader()->isolateIfNecessaryDueToCrossOriginOpenerPolicy(crossOriginOpenerPolicy, response.url());
>+
>     // There is a bug in CFNetwork where callbacks can be dispatched even when loads are deferred.
>     // See <rdar://problem/6304600> for more details.
> #if !USE(CF)
>diff --git a/Source/WebCore/loader/FrameLoader.cpp b/Source/WebCore/loader/FrameLoader.cpp
>index c93cebd1f2c709146825e67899c61fa6703e8547..4039fcbb37b58586e6e0cdb4d64f570b6c11f4cd 100644
>--- a/Source/WebCore/loader/FrameLoader.cpp
>+++ b/Source/WebCore/loader/FrameLoader.cpp
>@@ -46,6 +46,7 @@
> #include "CommonVM.h"
> #include "ContentFilter.h"
> #include "ContentSecurityPolicy.h"
>+#include "CrossOriginAccessControl.h"
> #include "DOMWindow.h"
> #include "DatabaseManager.h"
> #include "DiagnosticLoggingClient.h"
>@@ -102,6 +103,7 @@
> #include "ResourceLoadInfo.h"
> #include "ResourceLoadObserver.h"
> #include "ResourceRequest.h"
>+#include "RuntimeEnabledFeatures.h"
> #include "SVGDocument.h"
> #include "SVGLocatable.h"
> #include "SVGNames.h"
>@@ -755,6 +757,10 @@ void FrameLoader::didBeginDocument(bool dispatch)
>             if (!headerContentLanguage.isEmpty())
>                 m_frame.document()->setContentLanguage(headerContentLanguage);
>         }
>+
>+        String crossOriginOpenerPolicyString = m_documentLoader->response().httpHeaderField(HTTPHeaderName::CrossOriginOpenerPolicy);
>+        if (!crossOriginOpenerPolicyString.isEmpty())
>+            m_frame.document()->setCrossOriginOpenerPolicy(parseCrossOriginOpenerPolicyHeader(crossOriginOpenerPolicyString));
>     }
> 
>     history().restoreDocumentState();
>@@ -1358,9 +1364,6 @@ void FrameLoader::loadURL(FrameLoadRequest&& frameLoadRequest, const String& ref
>         return;
> 
>     NavigationAction action { frameLoadRequest.requester(), request, frameLoadRequest.initiatedByMainFrame(), newLoadType, isFormSubmission, event, frameLoadRequest.shouldOpenExternalURLsPolicy(), frameLoadRequest.downloadAttribute() };
>-    if (m_frame.page() && m_frame.page()->openedViaWindowOpenWithOpener())
>-        action.setOpenedViaWindowOpenWithOpener();
>-    action.setHasOpenedFrames(!m_openedFrames.isEmpty());
>     action.setLockHistory(lockHistory);
>     action.setLockBackForwardList(frameLoadRequest.lockBackForwardList());
> 
>@@ -3519,6 +3522,60 @@ bool FrameLoader::shouldInterruptLoadForXFrameOptions(const String& content, con
>     return false;
> }
> 
>+void FrameLoader::isolateIfNecessaryDueToCrossOriginOpenerPolicy(const String& content, const URL& destinationURL)
>+{
>+    if (!RuntimeEnabledFeatures::sharedFeatures().crossOriginOpenerPolicyEnabled())
>+        return;
>+
>+    if (!m_frame.isMainFrame() || !m_frame.document())
>+        return;
>+
>+    auto policy = parseCrossOriginOpenerPolicyHeader(content);
>+
>+    // No matter their origins, if the source and the destionation disagree on the cross-origin opener policy, then we isolate the destination.
>+    if (policy != m_frame.document()->crossOriginOpenerPolicy()) {
>+        RELEASE_LOG_IF_ALLOWED("isolateIfNecessaryDueToCrossOriginOpenerPolicy: isolating browsing context from any opener / openees due to Cross-Origin-Opener-policy mismatch between source and destination");
>+        isolateFromOtherBrowsingContexts();
>+        return;
>+    }
>+
>+    switch (policy) {
>+    case CrossOriginOpenerPolicy::SameOrigin: {
>+        auto destinationOrigin = SecurityOrigin::create(destinationURL);
>+        if (!destinationOrigin->isSameSchemeHostPort(m_frame.document()->securityOrigin())) {
>+            RELEASE_LOG_IF_ALLOWED("isolateIfNecessaryDueToCrossOriginOpenerPolicy: isolating browsing context from any opener / openees due to Cross-Origin-Opener-policy: same-origin");
>+            isolateFromOtherBrowsingContexts();
>+        }
>+        break;
>+    }
>+    case CrossOriginOpenerPolicy::SameSite:
>+        if (!isSameSiteURL(m_frame.document()->securityOrigin(), destinationURL)) {
>+            RELEASE_LOG_IF_ALLOWED("isolateIfNecessaryDueToCrossOriginOpenerPolicy: isolating browsing context from any opener / openees due to Cross-Origin-Opener-policy: same-site");
>+            isolateFromOtherBrowsingContexts();
>+        }
>+        break;
>+    case CrossOriginOpenerPolicy::None:
>+        break;
>+    }
>+}
>+
>+void FrameLoader::isolateFromOtherBrowsingContexts()
>+{
>+    // Disown opener.
>+    setOpener(nullptr);
>+    if (auto* page = m_frame.page())
>+        page->setOpenedViaWindowOpenWithOpener(false);
>+
>+    // Disconnect from openees.
>+    for (auto& frame : m_openedFrames)
>+        frame->loader().m_opener = nullptr;
>+    m_openedFrames.clear();
>+
>+    // Make sure we use fresh Window proxies. The old window proxies will keep pointing to the old window which will be frameless when
>+    // a new window is created for this frame.
>+    m_frame.resetScript();
>+}
>+
> void FrameLoader::loadProvisionalItemFromCachedPage()
> {
>     DocumentLoader* provisionalLoader = provisionalDocumentLoader();
>diff --git a/Source/WebCore/loader/FrameLoader.h b/Source/WebCore/loader/FrameLoader.h
>index a0bca8edc48a4236dfb168bf209aef08d41eafa5..2eacfd1d34ad352f996cb39457b82ecc49f51de0 100644
>--- a/Source/WebCore/loader/FrameLoader.h
>+++ b/Source/WebCore/loader/FrameLoader.h
>@@ -248,6 +248,7 @@ public:
> 
>     WEBCORE_EXPORT Frame* opener();
>     WEBCORE_EXPORT void setOpener(Frame*);
>+    bool hasOpenedFrames() const { return !m_openedFrames.isEmpty(); }
> 
>     void resetMultipleFormSubmissionProtection();
> 
>@@ -276,6 +277,7 @@ public:
>     void applyUserAgentIfNeeded(ResourceRequest&);
> 
>     bool shouldInterruptLoadForXFrameOptions(const String&, const URL&, unsigned long requestIdentifier);
>+    void isolateIfNecessaryDueToCrossOriginOpenerPolicy(const String&, const URL& destinationURL);
> 
>     void completed();
>     bool allAncestorsAreComplete() const; // including this
>@@ -321,6 +323,8 @@ private:
>         MayNotAttemptCacheOnlyLoadForFormSubmissionItem
>     };
> 
>+    void isolateFromOtherBrowsingContexts();
>+
>     bool allChildrenAreComplete() const; // immediate children, not all descendants
> 
>     void checkTimerFired();
>diff --git a/Source/WebCore/loader/PolicyChecker.cpp b/Source/WebCore/loader/PolicyChecker.cpp
>index 4f90f94b7f1b957d76c6ed3d2762f477227907fa..e61356696af8529a9a6a7135c6bd3706abfba6a5 100644
>--- a/Source/WebCore/loader/PolicyChecker.cpp
>+++ b/Source/WebCore/loader/PolicyChecker.cpp
>@@ -106,6 +106,10 @@ void PolicyChecker::checkNavigationPolicy(ResourceRequest&& request, const Resou
>         loader->setTriggeringAction(NavigationAction { action });
>     }
> 
>+    if (m_frame.page() && m_frame.page()->openedViaWindowOpenWithOpener())
>+        action.setOpenedViaWindowOpenWithOpener();
>+    action.setHasOpenedFrames(m_frame.loader().hasOpenedFrames());
>+
>     // Don't ask more than once for the same request or if we are loading an empty URL.
>     // This avoids confusion on the part of the client.
>     if (equalIgnoringHeaderFields(request, loader->lastCheckedRequest()) || (!request.isNull() && request.url().isEmpty())) {
>diff --git a/Source/WebCore/page/AbstractFrame.cpp b/Source/WebCore/page/AbstractFrame.cpp
>index 594a55e10451bab9e871ee981fb3b62e429552a2..68e63706d78ae184fa34c12d7adcff8613cf8e7f 100644
>--- a/Source/WebCore/page/AbstractFrame.cpp
>+++ b/Source/WebCore/page/AbstractFrame.cpp
>@@ -40,4 +40,10 @@ AbstractFrame::~AbstractFrame()
>     m_windowProxy->detachFromFrame();
> }
> 
>+void AbstractFrame::resetWindowProxy()
>+{
>+    m_windowProxy->detachFromFrame();
>+    m_windowProxy = WindowProxy::create(*this);
>+}
>+
> } // namespace WebCore
>diff --git a/Source/WebCore/page/AbstractFrame.h b/Source/WebCore/page/AbstractFrame.h
>index 995a3612820a6ff414ac0d104edc48924872ff4f..18ba9287cc349c5e8a58888755cbb86586f5c7b8 100644
>--- a/Source/WebCore/page/AbstractFrame.h
>+++ b/Source/WebCore/page/AbstractFrame.h
>@@ -49,6 +49,8 @@ public:
> protected:
>     AbstractFrame();
> 
>+    void resetWindowProxy();
>+
> private:
>     virtual AbstractDOMWindow* virtualWindow() const = 0;
> 
>diff --git a/Source/WebCore/page/DOMWindow.cpp b/Source/WebCore/page/DOMWindow.cpp
>index 368e8bc3363edcc3907fdd0b9723f0cca37b8c8d..114a5700769a0ec261dadd244a799860c9b7f7b1 100644
>--- a/Source/WebCore/page/DOMWindow.cpp
>+++ b/Source/WebCore/page/DOMWindow.cpp
>@@ -2239,7 +2239,7 @@ ExceptionOr<RefPtr<Frame>> DOMWindow::createWindow(const String& urlString, cons
> 
>     if (!windowFeatures.noopener) {
>         newFrame->loader().setOpener(&openerFrame);
>-        newFrame->page()->setOpenedViaWindowOpenWithOpener();
>+        newFrame->page()->setOpenedViaWindowOpenWithOpener(true);
>     }
>     if (created)
>         newFrame->page()->setOpenedByDOM();
>diff --git a/Source/WebCore/page/Frame.cpp b/Source/WebCore/page/Frame.cpp
>index 10d2c4ffd8a2207eaaa2f6ab6b0a51368518e15b..5ff8fbda6789f4a42c214a04eaa471cf4e5ea1e0 100644
>--- a/Source/WebCore/page/Frame.cpp
>+++ b/Source/WebCore/page/Frame.cpp
>@@ -1130,4 +1130,10 @@ void Frame::selfOnlyDeref()
>     deref();
> }
> 
>+void Frame::resetScript()
>+{
>+    resetWindowProxy();
>+    m_script = makeUniqueRef<ScriptController>(*this);
>+}
>+
> } // namespace WebCore
>diff --git a/Source/WebCore/page/Frame.h b/Source/WebCore/page/Frame.h
>index b747fd6c6e4032368c06b7ec87c564008a279d53..1139bffa491f10090e6f32ee4e3e2e4dc18d7fc3 100644
>--- a/Source/WebCore/page/Frame.h
>+++ b/Source/WebCore/page/Frame.h
>@@ -167,6 +167,7 @@ public:
>     const CSSAnimationController& animation() const { return m_animationController; }
>     ScriptController& script() { return m_script; }
>     const ScriptController& script() const { return m_script; }
>+    void resetScript();
>     
>     WEBCORE_EXPORT RenderView* contentRenderer() const; // Root of the render tree for the document contained in this frame.
>     WEBCORE_EXPORT RenderWidget* ownerRenderer() const; // Renderer for the element that contains this frame.
>diff --git a/Source/WebCore/page/Page.h b/Source/WebCore/page/Page.h
>index 3dbe572cd32903d5fcbd6c37e051bceb10723e7e..4344f17dabbfdf8c1a83dc2dce42e6e0fcad97a1 100644
>--- a/Source/WebCore/page/Page.h
>+++ b/Source/WebCore/page/Page.h
>@@ -204,7 +204,7 @@ public:
>     void setOpenedByDOM();
> 
>     bool openedViaWindowOpenWithOpener() const { return m_openedViaWindowOpenWithOpener; }
>-    void setOpenedViaWindowOpenWithOpener() { m_openedViaWindowOpenWithOpener = true; }
>+    void setOpenedViaWindowOpenWithOpener(bool value) { m_openedViaWindowOpenWithOpener = value; }
> 
>     WEBCORE_EXPORT void goToItem(HistoryItem&, FrameLoadType, ShouldTreatAsContinuingLoad);
> 
>diff --git a/Source/WebCore/page/RuntimeEnabledFeatures.h b/Source/WebCore/page/RuntimeEnabledFeatures.h
>index ac795057f545d96e0158d56993ff2051b774afa6..43ff7b0617d20c6d2f9aca580a8e38cc5a5ce906 100644
>--- a/Source/WebCore/page/RuntimeEnabledFeatures.h
>+++ b/Source/WebCore/page/RuntimeEnabledFeatures.h
>@@ -46,6 +46,9 @@ public:
>     void setBlankAnchorTargetImpliesNoOpenerEnabled(bool isEnabled) { m_blankAnchorTargetImpliesNoOpenerEnabled = isEnabled; }
>     bool blankAnchorTargetImpliesNoOpenerEnabled() const { return m_blankAnchorTargetImpliesNoOpenerEnabled; }
> 
>+    void setCrossOriginOpenerPolicyEnabled(bool isEnabled) { m_crossOriginOpenerPolicyEnabled = isEnabled; }
>+    bool crossOriginOpenerPolicyEnabled() const { return m_crossOriginOpenerPolicyEnabled; }
>+
>     void setDisplayContentsEnabled(bool isEnabled) { m_isDisplayContentsEnabled = isEnabled; }
>     bool displayContentsEnabled() const { return m_isDisplayContentsEnabled; }
> 
>@@ -329,6 +332,7 @@ private:
>     RuntimeEnabledFeatures();
> 
>     bool m_blankAnchorTargetImpliesNoOpenerEnabled { true };
>+    bool m_crossOriginOpenerPolicyEnabled { false };
>     bool m_areModernMediaControlsEnabled { false };
>     bool m_isLinkPreloadEnabled { true };
>     bool m_isLinkPrefetchEnabled { false };
>diff --git a/Source/WebCore/platform/network/HTTPHeaderNames.in b/Source/WebCore/platform/network/HTTPHeaderNames.in
>index 47f69040e81b92a2f03f2772436eaa4c62e82bf1..8379aa14c4c02cb8079a5c0f323ec0932c3e843e 100644
>--- a/Source/WebCore/platform/network/HTTPHeaderNames.in
>+++ b/Source/WebCore/platform/network/HTTPHeaderNames.in
>@@ -50,8 +50,8 @@ Content-Type
> Content-Range
> Cookie
> Cookie2
>+Cross-Origin-Opener-Policy
> Cross-Origin-Resource-Policy
>-Cross-Origin-Window-Policy
> Date
> DNT
> Default-Style
>diff --git a/Source/WebCore/platform/network/HTTPParsers.cpp b/Source/WebCore/platform/network/HTTPParsers.cpp
>index 942c7017f4d100d2ac74e04a7336de59a1cabe89..343fc137e629863d15a2f5a6795f008089dc8071 100644
>--- a/Source/WebCore/platform/network/HTTPParsers.cpp
>+++ b/Source/WebCore/platform/network/HTTPParsers.cpp
>@@ -524,6 +524,25 @@ XFrameOptionsDisposition parseXFrameOptionsHeader(const String& header)
>     return result;
> }
> 
>+CrossOriginOpenerPolicy parseCrossOriginOpenerPolicyHeader(StringView header)
>+{
>+    CrossOriginOpenerPolicy policy = CrossOriginOpenerPolicy::None;
>+    header = stripLeadingAndTrailingHTTPSpaces(header);
>+    if (header.isEmpty())
>+        return policy;
>+
>+    // FIXME: for now we ignore any flag that may come after the [same-origin | same-site] value.
>+    auto spaceIndex = header.find(isHTTPSpace, 0);
>+    if (spaceIndex != notFound)
>+        header = header.substring(0, spaceIndex);
>+
>+    if (equalLettersIgnoringASCIICase(header, "same-origin"))
>+        policy = CrossOriginOpenerPolicy::SameOrigin;
>+    else if (equalLettersIgnoringASCIICase(header, "same-site"))
>+        policy = CrossOriginOpenerPolicy::SameSite;
>+    return policy;
>+}
>+
> bool parseRange(const String& range, long long& rangeOffset, long long& rangeEnd, long long& rangeSuffixLength)
> {
>     // The format of "Range" header is defined in RFC 2616 Section 14.35.1.
>diff --git a/Source/WebCore/platform/network/HTTPParsers.h b/Source/WebCore/platform/network/HTTPParsers.h
>index abe739d8e722733c038aefbcefe4e702d422d66b..dab89f07b4b25431f2b087663d9d43581d6fa70f 100644
>--- a/Source/WebCore/platform/network/HTTPParsers.h
>+++ b/Source/WebCore/platform/network/HTTPParsers.h
>@@ -71,6 +71,12 @@ enum class CrossOriginResourcePolicy {
>     Invalid
> };
> 
>+enum class CrossOriginOpenerPolicy {
>+    None,
>+    SameOrigin,
>+    SameSite
>+};
>+
> bool isValidReasonPhrase(const String&);
> bool isValidHTTPHeaderValue(const String&);
> bool isValidAcceptHeaderValue(const String&);
>@@ -85,6 +91,7 @@ void findCharsetInMediaType(const String& mediaType, unsigned int& charsetPos, u
> XSSProtectionDisposition parseXSSProtectionHeader(const String& header, String& failureReason, unsigned& failurePosition, String& reportURL);
> AtomicString extractReasonPhraseFromHTTPStatusLine(const String&);
> WEBCORE_EXPORT XFrameOptionsDisposition parseXFrameOptionsHeader(const String&);
>+CrossOriginOpenerPolicy parseCrossOriginOpenerPolicyHeader(StringView);
> 
> // -1 could be set to one of the return parameters to indicate the value is not specified.
> WEBCORE_EXPORT bool parseRange(const String&, long long& rangeOffset, long long& rangeEnd, long long& rangeSuffixLength);
>diff --git a/Source/WebKit/Shared/WebPreferences.yaml b/Source/WebKit/Shared/WebPreferences.yaml
>index 936452def559294b565faef92acca8118aecc937..660aa247fd4b9473ee7c138e3a2d09c05e3c8b0e 100644
>--- a/Source/WebKit/Shared/WebPreferences.yaml
>+++ b/Source/WebKit/Shared/WebPreferences.yaml
>@@ -6,6 +6,14 @@ BlankAnchorTargetImpliesNoOpenerEnabled:
>    humanReadableDescription: "target=_blank on anchor elements implies rel=noopener"
>    category: experimental
> 
>+CrossOriginOpenerPolicyEnabled:
>+  type: bool
>+  defaultValue: false
>+  webcoreBinding: RuntimeEnabledFeatures
>+  humanReadableName: "Support for Cross-Origin-Opener-Policy HTTP header"
>+  humanReadableDescription: "Support for Cross-Origin-Opener-Policy HTTP header"
>+  category: experimental
>+
> JavaScriptEnabled:
>   type: bool
>   defaultValue: true
>diff --git a/Source/WebKit/UIProcess/API/C/WKPreferences.cpp b/Source/WebKit/UIProcess/API/C/WKPreferences.cpp
>index 823174a29d94997854a07a1a39386179c0a2d8c0..b878d9e75f305f2e4baca909b8690dadf3ba36d5 100644
>--- a/Source/WebKit/UIProcess/API/C/WKPreferences.cpp
>+++ b/Source/WebKit/UIProcess/API/C/WKPreferences.cpp
>@@ -2030,6 +2030,16 @@ bool WKPreferencesGetRestrictedHTTPResponseAccess(WKPreferencesRef preferencesRe
>     return toImpl(preferencesRef)->restrictedHTTPResponseAccess();
> }
> 
>+bool WKPreferencesGetCrossOriginOpenerPolicyEnabled(WKPreferencesRef preferencesRef)
>+{
>+    return toImpl(preferencesRef)->crossOriginOpenerPolicyEnabled();
>+}
>+
>+void WKPreferencesSetCrossOriginOpenerPolicyEnabled(WKPreferencesRef preferencesRef, bool enabled)
>+{
>+    toImpl(preferencesRef)->setCrossOriginOpenerPolicyEnabled(enabled);
>+}
>+
> void WKPreferencesSetServerTimingEnabled(WKPreferencesRef preferencesRef, bool flag)
> {
>     toImpl(preferencesRef)->setServerTimingEnabled(flag);
>diff --git a/Source/WebKit/UIProcess/API/C/WKPreferencesRef.h b/Source/WebKit/UIProcess/API/C/WKPreferencesRef.h
>index 9716693f6d8603481951adea40e65df96857001c..6f20f408ed91390c14f1654e659c928a8af583c6 100644
>--- a/Source/WebKit/UIProcess/API/C/WKPreferencesRef.h
>+++ b/Source/WebKit/UIProcess/API/C/WKPreferencesRef.h
>@@ -320,9 +320,13 @@ WK_EXPORT void WKPreferencesSetMediaCapabilitiesEnabled(WKPreferencesRef prefere
> WK_EXPORT bool WKPreferencesGetRestrictedHTTPResponseAccess(WKPreferencesRef preferencesRef);
> WK_EXPORT void WKPreferencesSetRestrictedHTTPResponseAccess(WKPreferencesRef preferencesRef, bool allow);
> 
>+// Defaults to false.
>+WK_EXPORT bool WKPreferencesGetCrossOriginOpenerPolicyEnabled(WKPreferencesRef preferencesRef);
>+WK_EXPORT void WKPreferencesSetCrossOriginOpenerPolicyEnabled(WKPreferencesRef preferencesRef, bool allow);
>+
> // Defaults to false.
> WK_EXPORT bool WKPreferencesGetCrossOriginResourcePolicyEnabled(WKPreferencesRef preferencesRef);
>-WK_EXPORT void WKPreferencesSetCrossOriginResourcePolicyEnabled(WKPreferencesRef preferencesRef, bool allow);
>+WK_EXPORT void WKPreferencesSetCrossOriginResourcePolicyEnabled(WKPreferencesRef preferencesRef, bool enabled);
> 
> // Defaults to false.
> WK_EXPORT bool WKPreferencesGetProcessSwapOnNavigationEnabled(WKPreferencesRef preferencesRef);
>diff --git a/Source/WebKit/UIProcess/API/Cocoa/WKPreferences.mm b/Source/WebKit/UIProcess/API/Cocoa/WKPreferences.mm
>index eda9c818e66123bc148875afb737eddcb06167bb..9f9053cfcab86a0873fb3fbff98ce944ce63b3e1 100644
>--- a/Source/WebKit/UIProcess/API/Cocoa/WKPreferences.mm
>+++ b/Source/WebKit/UIProcess/API/Cocoa/WKPreferences.mm
>@@ -1346,6 +1346,16 @@ - (BOOL)_webAnimationsCSSIntegrationEnabled
>     return _preferences->webAnimationsCSSIntegrationEnabled();
> }
> 
>+- (void)_setCrossOriginOpenerPolicyEnabled:(BOOL)enabled
>+{
>+    _preferences->setCrossOriginOpenerPolicyEnabled(enabled);
>+}
>+
>+- (BOOL)_crossOriginOpenerPolicyEnabled
>+{
>+    return _preferences->crossOriginOpenerPolicyEnabled();
>+}
>+
> @end
> 
> #endif // WK_API_ENABLED
>diff --git a/Source/WebKit/UIProcess/API/Cocoa/WKPreferencesPrivate.h b/Source/WebKit/UIProcess/API/Cocoa/WKPreferencesPrivate.h
>index 28698bfbe6e9a37c791ebc30d5df05005af28049..078a373547308567a02d6edaf91ae52bd90c93d7 100644
>--- a/Source/WebKit/UIProcess/API/Cocoa/WKPreferencesPrivate.h
>+++ b/Source/WebKit/UIProcess/API/Cocoa/WKPreferencesPrivate.h
>@@ -150,6 +150,7 @@ typedef NS_ENUM(NSInteger, _WKEditableLinkBehavior) {
> @property (nonatomic, setter=_setShouldIgnoreMetaViewport:) BOOL _shouldIgnoreMetaViewport WK_API_AVAILABLE(macos(WK_MAC_TBA), ios(WK_IOS_TBA));
> @property (nonatomic, setter=_setVideoQualityIncludesDisplayCompositingEnabled:) BOOL _videoQualityIncludesDisplayCompositingEnabled WK_API_AVAILABLE(macos(WK_MAC_TBA), ios(WK_IOS_TBA));
> @property (nonatomic, setter=_setWebAnimationsCSSIntegrationEnabled:) BOOL _webAnimationsCSSIntegrationEnabled WK_API_AVAILABLE(macosx(10.14), ios(WK_IOS_TBA));
>+@property (nonatomic, setter=_setCrossOriginOpenerPolicyEnabled:) BOOL _crossOriginOpenerPolicyEnabled WK_API_AVAILABLE(macosx(WK_MAC_TBA), ios(WK_IOS_TBA));
> 
> #if !TARGET_OS_IPHONE
> @property (nonatomic, setter=_setWebGLEnabled:) BOOL _webGLEnabled WK_API_AVAILABLE(macosx(10.13.4));
>diff --git a/Source/WebKitLegacy/mac/WebView/WebPreferenceKeysPrivate.h b/Source/WebKitLegacy/mac/WebView/WebPreferenceKeysPrivate.h
>index b73f6cb6830430fa18124b678520a06c14a4cc80..7d106a4fd912f5d5a761cbbde6137e38f4167a67 100644
>--- a/Source/WebKitLegacy/mac/WebView/WebPreferenceKeysPrivate.h
>+++ b/Source/WebKitLegacy/mac/WebView/WebPreferenceKeysPrivate.h
>@@ -175,6 +175,7 @@
> #define WebKitDataTransferItemsEnabledPreferenceKey @"WebKitDataTransferItemsEnabled"
> #define WebKitCustomPasteboardDataEnabledPreferenceKey @"WebKitCustomPasteboardDataEnabled"
> #define WebKitCacheAPIEnabledPreferenceKey @"WebKitCacheAPIEnabled"
>+#define WebKitCrossOriginOpenerPolicyEnabledPreferenceKey @"WebKitCrossOriginOpenerPolicyEnabled"
> #define WebKitFetchAPIEnabledPreferenceKey @"WebKitFetchAPIEnabled"
> #define WebKitWritableStreamAPIEnabledPreferenceKey @"WebKitWritableStreamAPIEnabled"
> #define WebKitReadableByteStreamAPIEnabledPreferenceKey @"WebKitReadableByteStreamAPIEnabled"
>diff --git a/Source/WebKitLegacy/mac/WebView/WebPreferences.mm b/Source/WebKitLegacy/mac/WebView/WebPreferences.mm
>index 7e1cfc1b1e29b46d6dbd1f33cb44c0b11591517a..3af47a42f84edf6ca9f450bf39b523e2458d882d 100644
>--- a/Source/WebKitLegacy/mac/WebView/WebPreferences.mm
>+++ b/Source/WebKitLegacy/mac/WebView/WebPreferences.mm
>@@ -637,6 +637,7 @@ + (void)initialize
>         [NSNumber numberWithBool:NO], WebKitWebMetalEnabledPreferenceKey,
> #endif
>         [NSNumber numberWithBool:NO], WebKitCacheAPIEnabledPreferenceKey,
>+        [NSNumber numberWithBool:NO], WebKitCrossOriginOpenerPolicyEnabledPreferenceKey,
>         [NSNumber numberWithBool:YES], WebKitFetchAPIEnabledPreferenceKey,
> 
> #if ENABLE(STREAMS_API)
>@@ -3027,6 +3028,16 @@ - (void)setCacheAPIEnabled:(BOOL)flag
>     [self _setBoolValue:flag forKey:WebKitCacheAPIEnabledPreferenceKey];
> }
> 
>+- (BOOL)crossOriginOpenerPolicyEnabled
>+{
>+    return [self _boolValueForKey:WebKitCrossOriginOpenerPolicyEnabledPreferenceKey];
>+}
>+
>+- (void)setCrossOriginOpenerPolicyEnabled:(BOOL)flag
>+{
>+    [self _setBoolValue:flag forKey:WebKitCrossOriginOpenerPolicyEnabledPreferenceKey];
>+}
>+
> - (BOOL)fetchAPIEnabled
> {
>     return [self _boolValueForKey:WebKitFetchAPIEnabledPreferenceKey];
>diff --git a/Source/WebKitLegacy/mac/WebView/WebPreferencesPrivate.h b/Source/WebKitLegacy/mac/WebView/WebPreferencesPrivate.h
>index 20b33429510785e706c1563331209661017a5e56..81605ad09b8f7ed3a6bbc0f6b6a7bb60eb76650e 100644
>--- a/Source/WebKitLegacy/mac/WebView/WebPreferencesPrivate.h
>+++ b/Source/WebKitLegacy/mac/WebView/WebPreferencesPrivate.h
>@@ -543,6 +543,9 @@ extern NSString *WebPreferencesCacheModelChangedInternalNotification WEBKIT_DEPR
> - (BOOL)cacheAPIEnabled;
> - (void)setCacheAPIEnabled:(BOOL)enabled;
> 
>+- (BOOL)crossOriginOpenerPolicyEnabled;
>+- (void)setCrossOriginOpenerPolicyEnabled:(BOOL)enabled;
>+
> - (void)setFetchAPIEnabled:(BOOL)flag;
> - (BOOL)fetchAPIEnabled;
> 
>diff --git a/Source/WebKitLegacy/mac/WebView/WebView.mm b/Source/WebKitLegacy/mac/WebView/WebView.mm
>index 893fa08ccf90658b447bb65bc39bfa359b7be003..b37d85adceb480b4ebe92c01050cc3fb3456e0f0 100644
>--- a/Source/WebKitLegacy/mac/WebView/WebView.mm
>+++ b/Source/WebKitLegacy/mac/WebView/WebView.mm
>@@ -3105,6 +3105,7 @@ - (void)_preferencesChanged:(WebPreferences *)preferences
> 
>     RuntimeEnabledFeatures::sharedFeatures().setCacheAPIEnabled([preferences cacheAPIEnabled]);
>     RuntimeEnabledFeatures::sharedFeatures().setFetchAPIEnabled([preferences fetchAPIEnabled]);
>+    RuntimeEnabledFeatures::sharedFeatures().setCrossOriginOpenerPolicyEnabled([preferences crossOriginOpenerPolicyEnabled]);
> 
> #if ENABLE(STREAMS_API)
>     RuntimeEnabledFeatures::sharedFeatures().setWritableStreamAPIEnabled([preferences writableStreamAPIEnabled]);
>diff --git a/Tools/ChangeLog b/Tools/ChangeLog
>index ecbcd97f30b0fe7ea95b6e4444f24fdff0369756..757cfcab56b8948a92d7999dfde0a77495a256e7 100644
>--- a/Tools/ChangeLog
>+++ b/Tools/ChangeLog
>@@ -1,3 +1,21 @@
>+2018-11-30  Chris Dumez  <cdumez@apple.com>
>+
>+        Add initial support for 'Cross-Origin-Opener-Policy' HTTP header
>+        https://bugs.webkit.org/show_bug.cgi?id=192193
>+        <rdar://problem/42013525>
>+
>+        Reviewed by NOBODY (OOPS!).
>+
>+        Add API test coverage.
>+
>+        * DumpRenderTree/mac/DumpRenderTree.mm:
>+        (enableExperimentalFeatures):
>+        * TestWebKitAPI/Tests/WebKitCocoa/ProcessSwapOnNavigation.mm:
>+        (-[PSONScheme addMappingFromURLString:toHeaders:]):
>+        (-[PSONScheme webView:startURLSchemeTask:]):
>+        * WebKitTestRunner/TestController.cpp:
>+        (WTR::TestController::resetPreferencesToConsistentValues):
>+
> 2018-11-28  Zalan Bujtas  <zalan@apple.com>
> 
>         [LFC][Quirk] Use non-collapsed vertical margin values when the container is stretched to the size of the ICB.
>diff --git a/Tools/DumpRenderTree/mac/DumpRenderTree.mm b/Tools/DumpRenderTree/mac/DumpRenderTree.mm
>index 5de612c59f367c4d094c8fb3178286ed3bdcbff0..15878c66d13cb3f154f701aa4fd18b923eb12f6b 100644
>--- a/Tools/DumpRenderTree/mac/DumpRenderTree.mm
>+++ b/Tools/DumpRenderTree/mac/DumpRenderTree.mm
>@@ -864,6 +864,7 @@ static void enableExperimentalFeatures(WebPreferences* preferences)
>     [preferences setAriaReflectionEnabled:YES];
>     [preferences setVisualViewportAPIEnabled:YES];
>     [preferences setColorFilterEnabled:YES];
>+    [preferences setCrossOriginOpenerPolicyEnabled:YES];
>     [preferences setServerTimingEnabled:YES];
>     [preferences setIntersectionObserverEnabled:YES];
>     preferences.sourceBufferChangeTypeEnabled = YES;
>diff --git a/Tools/TestWebKitAPI/Tests/WebKitCocoa/ProcessSwapOnNavigation.mm b/Tools/TestWebKitAPI/Tests/WebKitCocoa/ProcessSwapOnNavigation.mm
>index f32fae510964deb6b6417e2bc9fdbca0b13cf942..b96ae2829c63879e0b7111ed8d24e45215065901 100644
>--- a/Tools/TestWebKitAPI/Tests/WebKitCocoa/ProcessSwapOnNavigation.mm
>+++ b/Tools/TestWebKitAPI/Tests/WebKitCocoa/ProcessSwapOnNavigation.mm
>@@ -189,6 +189,7 @@ @interface PSONScheme : NSObject <WKURLSchemeHandler> {
>     const char* _bytes;
>     HashMap<String, String> _redirects;
>     HashMap<String, RetainPtr<NSData *>> _dataMappings;
>+    HashMap<String, NSDictionary<NSString *, NSString *> *> _headers;
> }
> - (instancetype)initWithBytes:(const char*)bytes;
> - (void)addRedirectFromURLString:(NSString *)sourceURLString toURLString:(NSString *)destinationURLString;
>@@ -214,6 +215,11 @@ - (void)addMappingFromURLString:(NSString *)urlString toData:(const char*)data
>     _dataMappings.set(urlString, [NSData dataWithBytesNoCopy:(void*)data length:strlen(data) freeWhenDone:NO]);
> }
> 
>+- (void)addMappingFromURLString:(NSString *)urlString toHeaders:(NSDictionary<NSString *, NSString *> *)headers
>+{
>+    _headers.set(urlString, headers);
>+}
>+
> - (void)webView:(WKWebView *)webView startURLSchemeTask:(id <WKURLSchemeTask>)task
> {
>     NSURL *finalURL = task.request.URL;
>@@ -227,7 +233,11 @@ - (void)webView:(WKWebView *)webView startURLSchemeTask:(id <WKURLSchemeTask>)ta
>         [(id<WKURLSchemeTaskPrivate>)task _didPerformRedirection:redirectResponse.get() newRequest:request.get()];
>     }
> 
>-    RetainPtr<NSURLResponse> response = adoptNS([[NSURLResponse alloc] initWithURL:finalURL MIMEType:@"text/html" expectedContentLength:1 textEncodingName:nil]);
>+    NSDictionary<NSString *, NSString *> *headers = _headers.get(task.request.URL.absoluteString);
>+    if (!headers)
>+        headers = @{ @"Content-Type" : @"text/html", };
>+
>+    RetainPtr<NSURLResponse> response = adoptNS([[NSHTTPURLResponse alloc] initWithURL:finalURL statusCode:200 HTTPVersion:@"2.0" headerFields:headers]);
>     [task didReceiveResponse:response.get()];
> 
>     if (auto data = _dataMappings.get([finalURL absoluteString]))
>@@ -335,10 +345,35 @@ window.onload = function() {
> </script>
> )PSONRESOURCE";
> 
>+static const char* windowOpenCrossOriginButSameSiteWithOpenerTestBytes = R"PSONRESOURCE(
>+<script>
>+window.onload = function() {
>+    w = window.open("pson://bugs.webkit.org/main.html");
>+}
>+</script>
>+)PSONRESOURCE";
>+
> static const char* windowOpenCrossSiteWithOpenerTestBytes = R"PSONRESOURCE(
> <script>
> window.onload = function() {
>-    window.open("pson://www.apple.com/main.html");
>+    w = window.open("pson://www.apple.com/main.html");
>+}
>+</script>
>+)PSONRESOURCE";
>+
>+static const char* windowOpenCrossSiteWithOpenerLinkTargetingTestBytes = R"PSONRESOURCE(
>+<a id="testLink" target="foo" href="pson://www.webkit.org/main2.html">Link</a>
>+<script>
>+window.onload = function() {
>+    w = window.open("pson://www.apple.com/main.html", "foo");
>+}
>+</script>
>+)PSONRESOURCE";
>+
>+static const char* windowOpenSameSiteWithOpenerTestBytes = R"PSONRESOURCE(
>+<script>
>+window.onload = function() {
>+    w = window.open("pson://www.webkit.org/main2.html");
> }
> </script>
> )PSONRESOURCE";
>@@ -2973,6 +3008,486 @@ TEST(ProcessSwap, GoBackToSuspendedPageWithMainFrameIDThatIsNotOne)
>     EXPECT_EQ(pid1, pid5);
> }
> 
>+enum class NewWindowShouldBeIsolated { No, Yes };
>+enum class NewWindowOrigin { SameOrigin, CrossOriginButSameSite, CrossSite };
>+void runCrossOriginOpenerPolicyTest(const String& crossOriginOpenerPolicy, NewWindowOrigin newWindowOrigin, NewWindowShouldBeIsolated newWindowShouldBeIsolated)
>+{
>+    auto processPoolConfiguration = adoptNS([[_WKProcessPoolConfiguration alloc] init]);
>+    [processPoolConfiguration setProcessSwapsOnNavigation:YES];
>+    auto processPool = adoptNS([[WKProcessPool alloc] _initWithConfiguration:processPoolConfiguration.get()]);
>+
>+    auto webViewConfiguration = adoptNS([[WKWebViewConfiguration alloc] init]);
>+    [webViewConfiguration setProcessPool:processPool.get()];
>+    auto handler = adoptNS([[PSONScheme alloc] init]);
>+    NSString *destinationURL;
>+    switch (newWindowOrigin) {
>+    case NewWindowOrigin::SameOrigin:
>+        [handler addMappingFromURLString:@"pson://www.webkit.org/main1.html" toData:windowOpenSameSiteWithOpenerTestBytes]; // Opens "pson://www.webkit.org/main2.html".
>+        destinationURL = @"pson://www.webkit.org/main2.html";
>+        break;
>+    case NewWindowOrigin::CrossOriginButSameSite:
>+        [handler addMappingFromURLString:@"pson://www.webkit.org/main1.html" toData:windowOpenCrossOriginButSameSiteWithOpenerTestBytes]; // Opens "pson://bugs.webkit.org/main.html".
>+        destinationURL = @"pson://bugs.webkit.org/main.html";
>+        break;
>+    case NewWindowOrigin::CrossSite:
>+        [handler addMappingFromURLString:@"pson://www.webkit.org/main1.html" toData:windowOpenCrossSiteWithOpenerTestBytes]; // Opens "pson://www.apple.com/main.html".
>+        destinationURL = @"pson://www.apple.com/main.html";
>+        break;
>+    }
>+    [handler addMappingFromURLString:@"pson://www.webkit.org/main1.html" toHeaders:@{ @"Content-Type": @"text/html", @"Cross-Origin-Opener-Policy": (NSString *)crossOriginOpenerPolicy }];
>+    [handler addMappingFromURLString:destinationURL toHeaders:@{ @"Content-Type": @"text/html", @"Cross-Origin-Opener-Policy": (NSString *)crossOriginOpenerPolicy }];
>+
>+    [webViewConfiguration setURLSchemeHandler:handler.get() forURLScheme:@"PSON"];
>+
>+    auto messageHandler = adoptNS([[PSONMessageHandler alloc] init]);
>+    [[webViewConfiguration userContentController] addScriptMessageHandler:messageHandler.get() name:@"pson"];
>+
>+    auto webView = adoptNS([[WKWebView alloc] initWithFrame:NSMakeRect(0, 0, 800, 600) configuration:webViewConfiguration.get()]);
>+    auto navigationDelegate = adoptNS([[PSONNavigationDelegate alloc] init]);
>+    [webView setNavigationDelegate:navigationDelegate.get()];
>+    auto uiDelegate = adoptNS([[PSONUIDelegate alloc] initWithNavigationDelegate:navigationDelegate.get()]);
>+    [webView setUIDelegate:uiDelegate.get()];
>+
>+    [webView configuration].preferences._crossOriginOpenerPolicyEnabled = YES;
>+
>+    NSURLRequest *request = [NSURLRequest requestWithURL:[NSURL URLWithString:@"pson://www.webkit.org/main1.html"]];
>+
>+    [webView loadRequest:request];
>+    TestWebKitAPI::Util::run(&done);
>+    done = false;
>+
>+    TestWebKitAPI::Util::run(&didCreateWebView);
>+    didCreateWebView = false;
>+
>+    TestWebKitAPI::Util::run(&done);
>+    done = false;
>+
>+    // FIXME: We should be able to process-swap when newWindowShouldBeIsolated == NewWindowShouldBeIsolated::Yes.
>+    EXPECT_EQ([webView _webProcessIdentifier], [createdWebView _webProcessIdentifier]);
>+
>+    EXPECT_WK_STREQ(@"pson://www.webkit.org/main1.html", [[webView URL] absoluteString]);
>+    EXPECT_WK_STREQ(destinationURL, [[createdWebView URL] absoluteString]);
>+
>+    [webView evaluateJavaScript:@"w.closed ? 'true' : 'false'" completionHandler: [&] (id closed, NSError *error) {
>+        if (newWindowShouldBeIsolated == NewWindowShouldBeIsolated::Yes)
>+            EXPECT_WK_STREQ(@"true", closed);
>+        else
>+            EXPECT_WK_STREQ(@"false", closed);
>+        done = true;
>+    }];
>+    TestWebKitAPI::Util::run(&done);
>+    done = false;
>+
>+    // New window should not have an opener.
>+    [webView evaluateJavaScript:@"w.opener ? 'true' : 'false'" completionHandler: [&] (id hasOpener, NSError *error) {
>+        if (newWindowShouldBeIsolated == NewWindowShouldBeIsolated::Yes)
>+            EXPECT_WK_STREQ(@"false", hasOpener);
>+        else
>+            EXPECT_WK_STREQ(@"true", hasOpener);
>+        done = true;
>+    }];
>+    TestWebKitAPI::Util::run(&done);
>+    done = false;
>+
>+    [createdWebView evaluateJavaScript:@"window.opener ? 'true' : 'false'" completionHandler: [&] (id hasOpener, NSError *error) {
>+        if (newWindowShouldBeIsolated == NewWindowShouldBeIsolated::Yes)
>+            EXPECT_WK_STREQ(@"false", hasOpener);
>+        else
>+            EXPECT_WK_STREQ(@"true", hasOpener);
>+        done = true;
>+    }];
>+    TestWebKitAPI::Util::run(&done);
>+    done = false;
>+}
>+
>+TEST(ProcessSwap, WindowOpenSameOriginCrossOriginOpenerPolicySameOrigin)
>+{
>+    runCrossOriginOpenerPolicyTest("same-origin", NewWindowOrigin::SameOrigin, NewWindowShouldBeIsolated::No);
>+}
>+
>+TEST(ProcessSwap, WindowOpenCrossOriginOriginCrossOriginOpenerPolicySameOrigin)
>+{
>+    runCrossOriginOpenerPolicyTest("same-origin", NewWindowOrigin::CrossOriginButSameSite, NewWindowShouldBeIsolated::Yes);
>+}
>+
>+TEST(ProcessSwap, WindowOpenCrossSiteOriginCrossOriginOpenerPolicySameOrigin)
>+{
>+    runCrossOriginOpenerPolicyTest("same-origin", NewWindowOrigin::CrossSite, NewWindowShouldBeIsolated::Yes);
>+}
>+
>+TEST(ProcessSwap, WindowOpenSameOriginCrossOriginOpenerPolicySameSite)
>+{
>+    runCrossOriginOpenerPolicyTest("same-site", NewWindowOrigin::SameOrigin, NewWindowShouldBeIsolated::No);
>+}
>+
>+TEST(ProcessSwap, WindowOpenCrossOriginOriginCrossOriginOpenerPolicySameSite)
>+{
>+    runCrossOriginOpenerPolicyTest("same-site", NewWindowOrigin::CrossOriginButSameSite, NewWindowShouldBeIsolated::No);
>+}
>+
>+TEST(ProcessSwap, WindowOpenCrossSiteOriginCrossOriginOpenerPolicySameSite)
>+{
>+    runCrossOriginOpenerPolicyTest("same-site", NewWindowOrigin::CrossSite, NewWindowShouldBeIsolated::Yes);
>+}
>+
>+TEST(ProcessSwap, WindowOpenCrossSiteOriginCrossOriginOpenerPolicySameOriginAllowOutgoing)
>+{
>+    runCrossOriginOpenerPolicyTest("same-origin unsafe-allow-outgoing", NewWindowOrigin::CrossSite, NewWindowShouldBeIsolated::Yes);
>+}
>+
>+static const char* saveOpenerTestBytes = R"PSONRESOURCE(
>+<script>
>+window.onload = function() {
>+    savedOpener = opener;
>+}
>+</script>
>+)PSONRESOURCE";
>+
>+TEST(ProcessSwap, NavigateToWindowWithCrossOriginOpenerPolicy)
>+{
>+    auto processPoolConfiguration = adoptNS([[_WKProcessPoolConfiguration alloc] init]);
>+    [processPoolConfiguration setProcessSwapsOnNavigation:YES];
>+    auto processPool = adoptNS([[WKProcessPool alloc] _initWithConfiguration:processPoolConfiguration.get()]);
>+
>+    auto webViewConfiguration = adoptNS([[WKWebViewConfiguration alloc] init]);
>+    [webViewConfiguration setProcessPool:processPool.get()];
>+    auto handler = adoptNS([[PSONScheme alloc] init]);
>+    [handler addMappingFromURLString:@"pson://www.webkit.org/main1.html" toData:windowOpenSameSiteWithOpenerTestBytes]; // Opens "pson://www.webkit.org/main2.html".
>+    [handler addMappingFromURLString:@"pson://www.webkit.org/main2.html" toData:saveOpenerTestBytes];
>+    [handler addMappingFromURLString:@"pson://www.apple.com/main.html" toHeaders:@{ @"Content-Type": @"text/html", @"Cross-Origin-Opener-Policy": @"same-origin" }];
>+
>+    [webViewConfiguration setURLSchemeHandler:handler.get() forURLScheme:@"PSON"];
>+
>+    auto messageHandler = adoptNS([[PSONMessageHandler alloc] init]);
>+    [[webViewConfiguration userContentController] addScriptMessageHandler:messageHandler.get() name:@"pson"];
>+
>+    auto webView = adoptNS([[WKWebView alloc] initWithFrame:NSMakeRect(0, 0, 800, 600) configuration:webViewConfiguration.get()]);
>+    auto navigationDelegate = adoptNS([[PSONNavigationDelegate alloc] init]);
>+    [webView setNavigationDelegate:navigationDelegate.get()];
>+    auto uiDelegate = adoptNS([[PSONUIDelegate alloc] initWithNavigationDelegate:navigationDelegate.get()]);
>+    [webView setUIDelegate:uiDelegate.get()];
>+
>+    [webView configuration].preferences._crossOriginOpenerPolicyEnabled = YES;
>+
>+    NSURLRequest *request = [NSURLRequest requestWithURL:[NSURL URLWithString:@"pson://www.webkit.org/main1.html"]];
>+
>+    [webView loadRequest:request];
>+    TestWebKitAPI::Util::run(&done);
>+    done = false;
>+
>+    TestWebKitAPI::Util::run(&didCreateWebView);
>+    didCreateWebView = false;
>+
>+    TestWebKitAPI::Util::run(&done);
>+    done = false;
>+
>+    EXPECT_EQ([webView _webProcessIdentifier], [createdWebView _webProcessIdentifier]);
>+    auto webkitPID = [webView _webProcessIdentifier];
>+
>+    EXPECT_WK_STREQ(@"pson://www.webkit.org/main1.html", [[webView URL] absoluteString]);
>+    EXPECT_WK_STREQ(@"pson://www.webkit.org/main2.html", [[createdWebView URL] absoluteString]);
>+
>+    // New window should have an opener.
>+    [createdWebView evaluateJavaScript:@"window.opener ? 'true' : 'false'" completionHandler: [&] (id hasOpener, NSError *error) {
>+        EXPECT_WK_STREQ(@"true", hasOpener);
>+        done = true;
>+    }];
>+    TestWebKitAPI::Util::run(&done);
>+    done = false;
>+
>+    [createdWebView evaluateJavaScript:@"window.opener.closed ? 'true' : 'false'" completionHandler: [&] (id openerIsClosed, NSError *error) {
>+        EXPECT_WK_STREQ(@"false", openerIsClosed);
>+        done = true;
>+    }];
>+    TestWebKitAPI::Util::run(&done);
>+    done = false;
>+
>+    // Navigate cross-origin to a page with 'Cross-Origin-Opener-Policy: same-origin'.
>+    request = [NSURLRequest requestWithURL:[NSURL URLWithString:@"pson://www.apple.com/main.html"]];
>+
>+    [webView loadRequest:request];
>+    TestWebKitAPI::Util::run(&done);
>+    done = false;
>+
>+    EXPECT_WK_STREQ(@"pson://www.apple.com/main.html", [[webView URL] absoluteString]);
>+
>+    // FIXME: we should be able to process-swap in this case.
>+    EXPECT_EQ(webkitPID, [webView _webProcessIdentifier]);
>+
>+    // Auxiliary window should no longer have an opener.
>+    [createdWebView evaluateJavaScript:@"window.opener ? 'true' : 'false'" completionHandler: [&] (id hasOpener, NSError *error) {
>+        EXPECT_WK_STREQ(@"false", hasOpener);
>+        done = true;
>+    }];
>+    TestWebKitAPI::Util::run(&done);
>+    done = false;
>+
>+    // Saved opener should appear closed.
>+    [createdWebView evaluateJavaScript:@"savedOpener.closed ? 'true' : 'false'" completionHandler: [&] (id savedOpenerIsClosed, NSError *error) {
>+        EXPECT_WK_STREQ(@"true", savedOpenerIsClosed);
>+        done = true;
>+    }];
>+    TestWebKitAPI::Util::run(&done);
>+    done = false;
>+
>+    [createdWebView evaluateJavaScript:@"savedOpener.location.href" completionHandler: [&] (id savedOpenerURL, NSError *error) {
>+        EXPECT_WK_STREQ(@"about:blank", savedOpenerURL);
>+        done = true;
>+    }];
>+    TestWebKitAPI::Util::run(&done);
>+    done = false;
>+}
>+
>+// Source has the header, destination does hot.
>+TEST(ProcessSwap, CrossOriginOpenerPolicyMismatchDuringSameOriginNavigation1)
>+{
>+    auto processPoolConfiguration = adoptNS([[_WKProcessPoolConfiguration alloc] init]);
>+    [processPoolConfiguration setProcessSwapsOnNavigation:YES];
>+    auto processPool = adoptNS([[WKProcessPool alloc] _initWithConfiguration:processPoolConfiguration.get()]);
>+
>+    auto webViewConfiguration = adoptNS([[WKWebViewConfiguration alloc] init]);
>+    [webViewConfiguration setProcessPool:processPool.get()];
>+    auto handler = adoptNS([[PSONScheme alloc] init]);
>+    [handler addMappingFromURLString:@"pson://www.webkit.org/main1.html" toData:windowOpenSameSiteWithOpenerTestBytes]; // Opens "pson://www.webkit.org/main2.html".
>+    [handler addMappingFromURLString:@"pson://www.webkit.org/main1.html" toHeaders:@{ @"Content-Type": @"text/html", @"Cross-Origin-Opener-Policy": @"same-origin" }];
>+    [handler addMappingFromURLString:@"pson://www.webkit.org/main2.html" toData:saveOpenerTestBytes];
>+    [handler addMappingFromURLString:@"pson://www.webkit.org/main2.html" toHeaders:@{ @"Content-Type": @"text/html", @"Cross-Origin-Opener-Policy": @"same-origin" }];
>+
>+    [webViewConfiguration setURLSchemeHandler:handler.get() forURLScheme:@"PSON"];
>+
>+    auto messageHandler = adoptNS([[PSONMessageHandler alloc] init]);
>+    [[webViewConfiguration userContentController] addScriptMessageHandler:messageHandler.get() name:@"pson"];
>+
>+    auto webView = adoptNS([[WKWebView alloc] initWithFrame:NSMakeRect(0, 0, 800, 600) configuration:webViewConfiguration.get()]);
>+    auto navigationDelegate = adoptNS([[PSONNavigationDelegate alloc] init]);
>+    [webView setNavigationDelegate:navigationDelegate.get()];
>+    auto uiDelegate = adoptNS([[PSONUIDelegate alloc] initWithNavigationDelegate:navigationDelegate.get()]);
>+    [webView setUIDelegate:uiDelegate.get()];
>+
>+    [webView configuration].preferences._crossOriginOpenerPolicyEnabled = YES;
>+
>+    NSURLRequest *request = [NSURLRequest requestWithURL:[NSURL URLWithString:@"pson://www.webkit.org/main1.html"]];
>+
>+    [webView loadRequest:request];
>+    TestWebKitAPI::Util::run(&done);
>+    done = false;
>+
>+    TestWebKitAPI::Util::run(&didCreateWebView);
>+    didCreateWebView = false;
>+
>+    TestWebKitAPI::Util::run(&done);
>+    done = false;
>+
>+    EXPECT_EQ([webView _webProcessIdentifier], [createdWebView _webProcessIdentifier]);
>+    auto webkitPID = [webView _webProcessIdentifier];
>+
>+    EXPECT_WK_STREQ(@"pson://www.webkit.org/main1.html", [[webView URL] absoluteString]);
>+    EXPECT_WK_STREQ(@"pson://www.webkit.org/main2.html", [[createdWebView URL] absoluteString]);
>+
>+    // New window should have an opener.
>+    [createdWebView evaluateJavaScript:@"window.opener ? 'true' : 'false'" completionHandler: [&] (id hasOpener, NSError *error) {
>+        EXPECT_WK_STREQ(@"true", hasOpener);
>+        done = true;
>+    }];
>+    TestWebKitAPI::Util::run(&done);
>+    done = false;
>+
>+    [createdWebView evaluateJavaScript:@"window.opener.closed ? 'true' : 'false'" completionHandler: [&] (id openerIsClosed, NSError *error) {
>+        EXPECT_WK_STREQ(@"false", openerIsClosed);
>+        done = true;
>+    }];
>+    TestWebKitAPI::Util::run(&done);
>+    done = false;
>+
>+    // Navigate away from page with 'Cross-Origin-Opener-Policy: same-origin'.
>+    request = [NSURLRequest requestWithURL:[NSURL URLWithString:@"pson://www.webkit.org/main3.html"]];
>+
>+    [webView loadRequest:request];
>+    TestWebKitAPI::Util::run(&done);
>+    done = false;
>+
>+    EXPECT_WK_STREQ(@"pson://www.webkit.org/main3.html", [[webView URL] absoluteString]);
>+
>+    // FIXME: we should be able to process-swap in this case.
>+    EXPECT_EQ(webkitPID, [webView _webProcessIdentifier]);
>+
>+    // Auxiliary window should no longer have an opener.
>+    [createdWebView evaluateJavaScript:@"window.opener ? 'true' : 'false'" completionHandler: [&] (id hasOpener, NSError *error) {
>+        EXPECT_WK_STREQ(@"false", hasOpener);
>+        done = true;
>+    }];
>+    TestWebKitAPI::Util::run(&done);
>+    done = false;
>+
>+    // Saved opener should appear closed.
>+    [createdWebView evaluateJavaScript:@"savedOpener.closed ? 'true' : 'false'" completionHandler: [&] (id savedOpenerIsClosed, NSError *error) {
>+        EXPECT_WK_STREQ(@"true", savedOpenerIsClosed);
>+        done = true;
>+    }];
>+    TestWebKitAPI::Util::run(&done);
>+    done = false;
>+
>+    [createdWebView evaluateJavaScript:@"savedOpener.location.href" completionHandler: [&] (id savedOpenerURL, NSError *error) {
>+        EXPECT_WK_STREQ(@"about:blank", savedOpenerURL);
>+        done = true;
>+    }];
>+    TestWebKitAPI::Util::run(&done);
>+    done = false;
>+}
>+
>+// Source does not have the header, destination does.
>+TEST(ProcessSwap, CrossOriginOpenerPolicyMismatchDuringSameOriginNavigation2)
>+{
>+    auto processPoolConfiguration = adoptNS([[_WKProcessPoolConfiguration alloc] init]);
>+    [processPoolConfiguration setProcessSwapsOnNavigation:YES];
>+    auto processPool = adoptNS([[WKProcessPool alloc] _initWithConfiguration:processPoolConfiguration.get()]);
>+
>+    auto webViewConfiguration = adoptNS([[WKWebViewConfiguration alloc] init]);
>+    [webViewConfiguration setProcessPool:processPool.get()];
>+    auto handler = adoptNS([[PSONScheme alloc] init]);
>+    [handler addMappingFromURLString:@"pson://www.webkit.org/main1.html" toData:windowOpenSameSiteWithOpenerTestBytes]; // Opens "pson://www.webkit.org/main2.html".
>+    [handler addMappingFromURLString:@"pson://www.webkit.org/main2.html" toData:saveOpenerTestBytes];
>+    [handler addMappingFromURLString:@"pson://www.webkit.org/main3.html" toHeaders:@{ @"Content-Type": @"text/html", @"Cross-Origin-Opener-Policy": @"same-origin" }];
>+
>+    [webViewConfiguration setURLSchemeHandler:handler.get() forURLScheme:@"PSON"];
>+
>+    auto messageHandler = adoptNS([[PSONMessageHandler alloc] init]);
>+    [[webViewConfiguration userContentController] addScriptMessageHandler:messageHandler.get() name:@"pson"];
>+
>+    auto webView = adoptNS([[WKWebView alloc] initWithFrame:NSMakeRect(0, 0, 800, 600) configuration:webViewConfiguration.get()]);
>+    auto navigationDelegate = adoptNS([[PSONNavigationDelegate alloc] init]);
>+    [webView setNavigationDelegate:navigationDelegate.get()];
>+    auto uiDelegate = adoptNS([[PSONUIDelegate alloc] initWithNavigationDelegate:navigationDelegate.get()]);
>+    [webView setUIDelegate:uiDelegate.get()];
>+
>+    [webView configuration].preferences._crossOriginOpenerPolicyEnabled = YES;
>+
>+    NSURLRequest *request = [NSURLRequest requestWithURL:[NSURL URLWithString:@"pson://www.webkit.org/main1.html"]];
>+
>+    [webView loadRequest:request];
>+    TestWebKitAPI::Util::run(&done);
>+    done = false;
>+
>+    TestWebKitAPI::Util::run(&didCreateWebView);
>+    didCreateWebView = false;
>+
>+    TestWebKitAPI::Util::run(&done);
>+    done = false;
>+
>+    EXPECT_EQ([webView _webProcessIdentifier], [createdWebView _webProcessIdentifier]);
>+    auto webkitPID = [webView _webProcessIdentifier];
>+
>+    EXPECT_WK_STREQ(@"pson://www.webkit.org/main1.html", [[webView URL] absoluteString]);
>+    EXPECT_WK_STREQ(@"pson://www.webkit.org/main2.html", [[createdWebView URL] absoluteString]);
>+
>+    // New window should have an opener.
>+    [createdWebView evaluateJavaScript:@"window.opener ? 'true' : 'false'" completionHandler: [&] (id hasOpener, NSError *error) {
>+        EXPECT_WK_STREQ(@"true", hasOpener);
>+        done = true;
>+    }];
>+    TestWebKitAPI::Util::run(&done);
>+    done = false;
>+
>+    [createdWebView evaluateJavaScript:@"window.opener.closed ? 'true' : 'false'" completionHandler: [&] (id openerIsClosed, NSError *error) {
>+        EXPECT_WK_STREQ(@"false", openerIsClosed);
>+        done = true;
>+    }];
>+    TestWebKitAPI::Util::run(&done);
>+    done = false;
>+
>+    // Navigate away from page with 'Cross-Origin-Opener-Policy: same-origin'.
>+    request = [NSURLRequest requestWithURL:[NSURL URLWithString:@"pson://www.webkit.org/main3.html"]];
>+
>+    [webView loadRequest:request];
>+    TestWebKitAPI::Util::run(&done);
>+    done = false;
>+
>+    EXPECT_WK_STREQ(@"pson://www.webkit.org/main3.html", [[webView URL] absoluteString]);
>+
>+    // FIXME: we should be able to process-swap in this case.
>+    EXPECT_EQ(webkitPID, [webView _webProcessIdentifier]);
>+
>+    // Auxiliary window should no longer have an opener.
>+    [createdWebView evaluateJavaScript:@"window.opener ? 'true' : 'false'" completionHandler: [&] (id hasOpener, NSError *error) {
>+        EXPECT_WK_STREQ(@"false", hasOpener);
>+        done = true;
>+    }];
>+    TestWebKitAPI::Util::run(&done);
>+    done = false;
>+
>+    // Saved opener should appear closed.
>+    [createdWebView evaluateJavaScript:@"savedOpener.closed ? 'true' : 'false'" completionHandler: [&] (id savedOpenerIsClosed, NSError *error) {
>+        EXPECT_WK_STREQ(@"true", savedOpenerIsClosed);
>+        done = true;
>+    }];
>+    TestWebKitAPI::Util::run(&done);
>+    done = false;
>+
>+    [createdWebView evaluateJavaScript:@"savedOpener.location.href" completionHandler: [&] (id savedOpenerURL, NSError *error) {
>+        EXPECT_WK_STREQ(@"about:blank", savedOpenerURL);
>+        done = true;
>+    }];
>+    TestWebKitAPI::Util::run(&done);
>+    done = false;
>+}
>+
>+TEST(ProcessSwap, CrossOriginOpenerPolicyPreventsLinkTargeting)
>+{
>+    auto processPoolConfiguration = adoptNS([[_WKProcessPoolConfiguration alloc] init]);
>+    [processPoolConfiguration setProcessSwapsOnNavigation:YES];
>+    auto processPool = adoptNS([[WKProcessPool alloc] _initWithConfiguration:processPoolConfiguration.get()]);
>+
>+    auto webViewConfiguration = adoptNS([[WKWebViewConfiguration alloc] init]);
>+    [webViewConfiguration setProcessPool:processPool.get()];
>+    auto handler = adoptNS([[PSONScheme alloc] init]);
>+    [handler addMappingFromURLString:@"pson://www.webkit.org/main1.html" toData:windowOpenCrossSiteWithOpenerLinkTargetingTestBytes]; // Opens "pson://www.apple.com/main.html".
>+    [handler addMappingFromURLString:@"pson://www.apple.com/main.html" toHeaders:@{ @"Content-Type": @"text/html", @"Cross-Origin-Opener-Policy": @"same-origin" }];
>+
>+    [webViewConfiguration setURLSchemeHandler:handler.get() forURLScheme:@"PSON"];
>+
>+    auto messageHandler = adoptNS([[PSONMessageHandler alloc] init]);
>+    [[webViewConfiguration userContentController] addScriptMessageHandler:messageHandler.get() name:@"pson"];
>+
>+    auto webView = adoptNS([[WKWebView alloc] initWithFrame:NSMakeRect(0, 0, 800, 600) configuration:webViewConfiguration.get()]);
>+    auto navigationDelegate = adoptNS([[PSONNavigationDelegate alloc] init]);
>+    [webView setNavigationDelegate:navigationDelegate.get()];
>+    auto uiDelegate = adoptNS([[PSONUIDelegate alloc] initWithNavigationDelegate:navigationDelegate.get()]);
>+    [webView setUIDelegate:uiDelegate.get()];
>+
>+    [webView configuration].preferences._crossOriginOpenerPolicyEnabled = YES;
>+
>+    NSURLRequest *request = [NSURLRequest requestWithURL:[NSURL URLWithString:@"pson://www.webkit.org/main1.html"]];
>+
>+    [webView loadRequest:request];
>+    TestWebKitAPI::Util::run(&done);
>+    done = false;
>+
>+    TestWebKitAPI::Util::run(&didCreateWebView);
>+    didCreateWebView = false;
>+
>+    TestWebKitAPI::Util::run(&done);
>+    done = false;
>+
>+    EXPECT_WK_STREQ(@"pson://www.webkit.org/main1.html", [[webView URL] absoluteString]);
>+    EXPECT_WK_STREQ(@"pson://www.apple.com/main.html", [[createdWebView URL] absoluteString]);
>+
>+    RetainPtr<WKWebView> firstCreatedWebView = createdWebView;
>+
>+    // Click the link with target "foo", which matches the name of the new isolated window.
>+    // This should create a new WebView instead of navigating the existing one since they do not belong to the same browsing context group.
>+    [webView evaluateJavaScript:@"testLink.click()" completionHandler:nil];
>+
>+    TestWebKitAPI::Util::run(&didCreateWebView);
>+    didCreateWebView = false;
>+
>+    TestWebKitAPI::Util::run(&done);
>+    done = false;
>+
>+    EXPECT_WK_STREQ(@"pson://www.webkit.org/main1.html", [[webView URL] absoluteString]);
>+    EXPECT_WK_STREQ(@"pson://www.apple.com/main.html", [[firstCreatedWebView URL] absoluteString]);
>+    EXPECT_WK_STREQ(@"pson://www.webkit.org/main2.html", [[createdWebView URL] absoluteString]);
>+}
>+
> #endif // PLATFORM(MAC)
> 
> #endif // WK_API_ENABLED
>diff --git a/Tools/WebKitTestRunner/TestController.cpp b/Tools/WebKitTestRunner/TestController.cpp
>index 56374f70cc0f8e3033f2129ddea0f825f7756ed5..1476ff80f70559d077378d6dfee81f648a7840a3 100644
>--- a/Tools/WebKitTestRunner/TestController.cpp
>+++ b/Tools/WebKitTestRunner/TestController.cpp
>@@ -817,6 +817,7 @@ void TestController::resetPreferencesToConsistentValues(const TestOptions& optio
>     WKPreferencesSetCSSOMViewScrollingAPIEnabled(preferences, true);
>     WKPreferencesSetMediaCapabilitiesEnabled(preferences, true);
> 
>+    WKPreferencesSetCrossOriginOpenerPolicyEnabled(preferences, true);
>     WKPreferencesSetRestrictedHTTPResponseAccess(preferences, true);
> 
>     WKPreferencesSetServerTimingEnabled(preferences, true);
>diff --git a/LayoutTests/ChangeLog b/LayoutTests/ChangeLog
>index e1622f59e1eae2f18c96472fca54305015c3bef2..2fd5ec547956e248eafccaa6522210eb4cc7e617 100644
>--- a/LayoutTests/ChangeLog
>+++ b/LayoutTests/ChangeLog
>@@ -1,3 +1,18 @@
>+2018-11-29  Chris Dumez  <cdumez@apple.com>
>+
>+        Add initial support for 'Cross-Origin-Opener-Policy' HTTP header
>+        https://bugs.webkit.org/show_bug.cgi?id=192193
>+        <rdar://problem/42013525>
>+
>+        Reviewed by NOBODY (OOPS!).
>+
>+        Add layout test coverage.
>+
>+        * http/tests/security/Cross-Origin-Opener-Policy/cross-origin-opener-policy-basic-expected.txt: Added.
>+        * http/tests/security/Cross-Origin-Opener-Policy/cross-origin-opener-policy-basic.html: Added.
>+        * http/tests/security/Cross-Origin-Opener-Policy/resources/serve-cross-origin-opener-policy.cgi: Added.
>+        * platform/win/TestExpectations:
>+
> 2018-11-27  Jiewen Tan  <jiewen_tan@apple.com>
> 
>         Unreviewed, test gardening
>diff --git a/LayoutTests/http/tests/security/Cross-Origin-Opener-Policy/cross-origin-opener-policy-basic-expected.txt b/LayoutTests/http/tests/security/Cross-Origin-Opener-Policy/cross-origin-opener-policy-basic-expected.txt
>new file mode 100644
>index 0000000000000000000000000000000000000000..a25a0211c678473dcfa623e3ecbcc821ef9efa6a
>--- /dev/null
>+++ b/LayoutTests/http/tests/security/Cross-Origin-Opener-Policy/cross-origin-opener-policy-basic-expected.txt
>@@ -0,0 +1,64 @@
>+Tests that 'Cross-Origin-Opener-Policy: same-origin / same-site' isolates openee from opener.
>+
>+On success, you will see a series of "PASS" messages, followed by "TEST COMPLETE".
>+
>+
>+w = window.open('http://localhost:8000/security/Cross-Origin-Opener-Policy/resources/serve-cross-origin-opener-policy.cgi?policy=same-origin', 'same-origin')
>+PASS w.closed is false
>+PASS w.opener is this
>+PASS w.location.href is "about:blank"
>+PASS w.closed became true
>+PASS w.closed is true
>+PASS w.opener is null
>+PASS w.location.href is "about:blank"
>+ w2 = window.open('', 'same-origin')
>+PASS w === w2 is false
>+PASS w2.location.href is "about:blank"
>+w = window.open('http://localhost:8000/security/Cross-Origin-Opener-Policy/resources/serve-cross-origin-opener-policy.cgi?policy=same-site', 'same-site')
>+PASS w.closed is false
>+PASS w.opener is this
>+PASS w.location.href is "about:blank"
>+PASS w.closed became true
>+PASS w.closed is true
>+PASS w.opener is null
>+PASS w.location.href is "about:blank"
>+ w2 = window.open('', 'same-site')
>+PASS w === w2 is false
>+PASS w2.location.href is "about:blank"
>+w = window.open('http://localhost:8000/security/Cross-Origin-Opener-Policy/resources/serve-cross-origin-opener-policy.cgi?policy=same-site%20allow-outgoing', 'same-site%20allow-outgoing')
>+PASS w.closed is false
>+PASS w.opener is this
>+PASS w.location.href is "about:blank"
>+PASS w.closed became true
>+PASS w.closed is true
>+PASS w.opener is null
>+PASS w.location.href is "about:blank"
>+ w2 = window.open('', 'same-site%20allow-outgoing')
>+PASS w === w2 is false
>+PASS w2.location.href is "about:blank"
>+w = window.open('http://localhost:8000/security/Cross-Origin-Opener-Policy/resources/serve-cross-origin-opener-policy.cgi?policy=Same-Origin', 'Same-Origin')
>+PASS w.closed is false
>+PASS w.opener is this
>+PASS w.location.href is "about:blank"
>+PASS w.closed became true
>+PASS w.closed is true
>+PASS w.opener is null
>+PASS w.location.href is "about:blank"
>+ w2 = window.open('', 'Same-Origin')
>+PASS w === w2 is false
>+PASS w2.location.href is "about:blank"
>+w = window.open('http://localhost:8000/security/Cross-Origin-Opener-Policy/resources/serve-cross-origin-opener-policy.cgi?policy=%20%20Same-Site%20%20', '%20%20Same-Site%20%20')
>+PASS w.closed is false
>+PASS w.opener is this
>+PASS w.location.href is "about:blank"
>+PASS w.closed became true
>+PASS w.closed is true
>+PASS w.opener is null
>+PASS w.location.href is "about:blank"
>+ w2 = window.open('', '%20%20Same-Site%20%20')
>+PASS w === w2 is false
>+PASS w2.location.href is "about:blank"
>+PASS successfullyParsed is true
>+
>+TEST COMPLETE
>+
>diff --git a/LayoutTests/http/tests/security/Cross-Origin-Opener-Policy/cross-origin-opener-policy-basic.html b/LayoutTests/http/tests/security/Cross-Origin-Opener-Policy/cross-origin-opener-policy-basic.html
>new file mode 100644
>index 0000000000000000000000000000000000000000..675cfe097f33167f7786c07b5726f04cd6996bc4
>--- /dev/null
>+++ b/LayoutTests/http/tests/security/Cross-Origin-Opener-Policy/cross-origin-opener-policy-basic.html
>@@ -0,0 +1,54 @@
>+<!DOCTYPE html>
>+<html>
>+<head>
>+<script src="/js-test-resources/js-test.js"></script>
>+</head>
>+<body>
>+<script>
>+description("Tests that 'Cross-Origin-Opener-Policy: same-origin / same-site' isolates openee from opener.");
>+jsTestIsAsync = true;
>+
>+if (window.testRunner)
>+    testRunner.setCanOpenWindows();
>+
>+function runCrossOriginOpenerPolicyTest(_headerValue)
>+{
>+    headerValue = encodeURI(_headerValue);
>+    return new Promise(function (resolve) {
>+        evalAndLog("w = window.open('http://localhost:8000/security/Cross-Origin-Opener-Policy/resources/serve-cross-origin-opener-policy.cgi?policy=" + headerValue + "', '" + headerValue + "')");
>+        shouldBeFalse("w.closed");
>+        shouldBe("w.opener", "this");
>+        shouldBeEqualToString("w.location.href", "about:blank");
>+
>+        // w will eventually get closed as the new window is navigated to a page protected by 'Cross-Origin-Opener-Policy: same-site | same-origin'.
>+        shouldBecomeEqual("w.closed", "true", () => {
>+            shouldBeTrue("w.closed");
>+            shouldBeNull("w.opener");
>+            shouldBeEqualToString("w.location.href", "about:blank");
>+
>+            // It should not be possible to look-up the isolated window by name.
>+            evalAndLog(" w2 = window.open('', '" + headerValue + "')");
>+            shouldBeFalse("w === w2");
>+            shouldBeEqualToString("w2.location.href", "about:blank");
>+
>+            resolve();
>+        });
>+    });
>+}
>+
>+onload = () => {
>+    runCrossOriginOpenerPolicyTest("same-origin").then(() => {
>+        runCrossOriginOpenerPolicyTest("same-site").then(() => {
>+            runCrossOriginOpenerPolicyTest("same-site allow-outgoing").then(() => {
>+                runCrossOriginOpenerPolicyTest("Same-Origin").then(() => {
>+                    runCrossOriginOpenerPolicyTest("  Same-Site  ").then(() => {
>+                        finishJSTest();
>+                    });
>+                });
>+            });
>+        });
>+    });
>+};
>+</script>
>+</body>
>+</html>
>diff --git a/LayoutTests/http/tests/security/Cross-Origin-Opener-Policy/resources/serve-cross-origin-opener-policy.cgi b/LayoutTests/http/tests/security/Cross-Origin-Opener-Policy/resources/serve-cross-origin-opener-policy.cgi
>new file mode 100755
>index 0000000000000000000000000000000000000000..76833857b00c200324db689bf125cc0344c8bbe1
>--- /dev/null
>+++ b/LayoutTests/http/tests/security/Cross-Origin-Opener-Policy/resources/serve-cross-origin-opener-policy.cgi
>@@ -0,0 +1,12 @@
>+#!/usr/bin/perl -wT
>+use strict;
>+
>+use CGI qw(:standard);
>+my $query = new CGI;
>+my $policy = $query->param('policy');
>+
>+print "Content-Type: text/html\n";
>+print "Cache-Control: no-cache, no-store\n";
>+print "Cross-Origin-Opener-Policy: $policy\n\n";
>+
>+print "<p>TEST</p>\n";
>diff --git a/LayoutTests/platform/win/TestExpectations b/LayoutTests/platform/win/TestExpectations
>index 85b51380434c977b100285d8b2d41f6fe68c068a..422a5b19811c05b6ec5d6a46be234821383fcc59 100644
>--- a/LayoutTests/platform/win/TestExpectations
>+++ b/LayoutTests/platform/win/TestExpectations
>@@ -4235,6 +4235,9 @@ webkit.org/b/190520 editing/pasteboard/copy-paste-across-shadow-boundaries-with-
> # WebGPU is not supported on Windows
> webgpu [ Skip ]
> 
>+# There is currently no API to enable this feature on Windows.
>+http/tests/security/Cross-Origin-Opener-Policy [ Skip ]
>+
> webkit.org/b/191194 fast/block/basic/inline-content-with-floating-image.html [ Failure ]
> webkit.org/b/191194 fast/block/basic/inline-content-with-floating-images2.html [ Failure ]
> webkit.org/b/191194 fast/dom/inline-event-attributes-release.html [ Failure ]

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Attachments on bug 192193: 356095 | 356103 | 356115 | 356182 | 356185 | 356196 | 356213 | 433910 | 433976 | 434029 | 434047 | 434127 | 434134 | 434136 | 434288 | 434317 | 434433 | 434436 | 434468 | 434660