Attachment 393120 Details for Bug 208802 – Patch

[patch] Patch

bug-208802-20200310140928.patch (text/plain), 68.92 KB, created by cathiechen on 2020-03-09 23:09:33 PDT

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Creator: cathiechen

Created: 2020-03-09 23:09:33 PDT

Size: 68.92 KB

patch

obsolete

>Subversion Revision: 258141
>diff --git a/Source/JavaScriptCore/ChangeLog b/Source/JavaScriptCore/ChangeLog
>index fb31338a10864747a57272bba525da1ba193cd62..d990393bed99d127e78f1b38ff611154a73d93b2 100644
>--- a/Source/JavaScriptCore/ChangeLog
>+++ b/Source/JavaScriptCore/ChangeLog
>@@ -1,3 +1,14 @@
>+2020-03-09  Cathie Chen  <cathiechen@igalia.com>
>+
>+        Add support for overscroll customization parsing
>+        https://bugs.webkit.org/show_bug.cgi?id=208802
>+
>+        Reviewed by NOBODY (OOPS!).
>+
>+        Add ENABLE_OVERSCROLL_CUSTOMIZATION.
>+
>+        * Configurations/FeatureDefines.xcconfig:
>+
> 2020-03-08  Brady Eidson  <beidson@apple.com>
> 
>         Remember completed subranges during incremental PDF loading.
>diff --git a/Source/WebCore/ChangeLog b/Source/WebCore/ChangeLog
>index 5285f9ffd1390702534453c1a848090f13511022..4c1d64e88cb7ebbac31c9c756f66064b3ff37df4 100644
>--- a/Source/WebCore/ChangeLog
>+++ b/Source/WebCore/ChangeLog
>@@ -1,3 +1,20 @@
>+2020-03-09  Cathie Chen  <cathiechen@igalia.com>
>+
>+        Add support for overscroll customization parsing
>+        https://bugs.webkit.org/show_bug.cgi?id=208802
>+
>+        Reviewed by NOBODY (OOPS!).
>+
>+        Parse onoverscroll/scrollend attribute and overscroll/overscroll event name.
>+
>+        * bindings/js/WebCoreBuiltinNames.h:
>+        * dom/EventNames.h:
>+        * dom/GlobalEventHandlers.idl:
>+        * html/HTMLAttributeNames.in:
>+        * html/HTMLElement.cpp:
>+        (WebCore::HTMLElement::createEventHandlerNameMap):
>+        * page/Settings.yaml:
>+
> 2020-03-09  Rob Buis  <rbuis@igalia.com>
> 
>         Rename urlSelected to changeLocation
>diff --git a/Source/WebCore/PAL/ChangeLog b/Source/WebCore/PAL/ChangeLog
>index 1cc336faae667be1314ccce9effe932ddd44b0dd..4a7ce94940c6c256ac5fa0d826aa48bbe1a6854f 100644
>--- a/Source/WebCore/PAL/ChangeLog
>+++ b/Source/WebCore/PAL/ChangeLog
>@@ -1,3 +1,14 @@
>+2020-03-09  Cathie Chen  <cathiechen@igalia.com>
>+
>+        Add support for overscroll customization parsing
>+        https://bugs.webkit.org/show_bug.cgi?id=208802
>+
>+        Reviewed by NOBODY (OOPS!).
>+
>+        Add ENABLE_OVERSCROLL_CUSTOMIZATION.
>+
>+        * Configurations/FeatureDefines.xcconfig:
>+
> 2020-03-08  Per Arne Vollan  <pvollan@apple.com>
> 
>         [iOS] Mapping to UTI from tag and tag class should be performed in the UI process
>diff --git a/Source/WebKit/ChangeLog b/Source/WebKit/ChangeLog
>index 88ae4b2cf8cb5b381b713b9a509d762dd80106bf..6c562608377a50cd5e8cd831943e89929ee88e0f 100644
>--- a/Source/WebKit/ChangeLog
>+++ b/Source/WebKit/ChangeLog
>@@ -1,3 +1,15 @@
>+2020-03-09  Cathie Chen  <cathiechen@igalia.com>
>+
>+        Add support for overscroll customization parsing
>+        https://bugs.webkit.org/show_bug.cgi?id=208802
>+
>+        Reviewed by NOBODY (OOPS!).
>+
>+        Add ENABLE_OVERSCROLL_CUSTOMIZATION.
>+
>+        * Configurations/FeatureDefines.xcconfig:
>+        * Shared/WebPreferences.yaml:
>+
> 2020-03-09  Rob Buis  <rbuis@igalia.com>
> 
>         Rename urlSelected to changeLocation
>diff --git a/Source/WebKitLegacy/mac/ChangeLog b/Source/WebKitLegacy/mac/ChangeLog
>index 132f883e4441caaf95305935f732ae85a6288a7f..faffd2056318132e817e73a5e84d2dcf09cc3ba9 100644
>--- a/Source/WebKitLegacy/mac/ChangeLog
>+++ b/Source/WebKitLegacy/mac/ChangeLog
>@@ -1,3 +1,21 @@
>+2020-03-09  Cathie Chen  <cathiechen@igalia.com>
>+
>+        Add support for overscroll customization parsing
>+        https://bugs.webkit.org/show_bug.cgi?id=208802
>+
>+        Reviewed by NOBODY (OOPS!).
>+
>+        Add overscrollCustomizationEnabled WebPreference setting.
>+
>+        * Configurations/FeatureDefines.xcconfig:
>+        * WebView/WebPreferenceKeysPrivate.h:
>+        * WebView/WebPreferences.mm:
>+        (+[WebPreferences initialize]):
>+        (-[WebPreferences overscrollCustomizationEnabled]):
>+        (-[WebPreferences setOverscrollCustomizationEnabled:]):
>+        * WebView/WebPreferencesPrivate.h:
>+        * WebView/WebView.mm:
>+
> 2020-03-07  Darin Adler  <darin@apple.com>
> 
>         Begin moving off of live ranges for WebKit internals
>diff --git a/Source/WebKitLegacy/win/ChangeLog b/Source/WebKitLegacy/win/ChangeLog
>index 369e17f38075aebb95c1fee2aebf2dba4e3394b7..4f3be03702c17cf874818b1a5191d62ae9b49357 100644
>--- a/Source/WebKitLegacy/win/ChangeLog
>+++ b/Source/WebKitLegacy/win/ChangeLog
>@@ -1,3 +1,22 @@
>+2020-03-09  Cathie Chen  <cathiechen@igalia.com>
>+
>+        Add support for overscroll customization parsing
>+        https://bugs.webkit.org/show_bug.cgi?id=208802
>+
>+        Reviewed by NOBODY (OOPS!).
>+
>+        Add overscrollCustomizationEnabled WebPreference setting.
>+
>+        * Interfaces/IWebPreferencesPrivate.idl:
>+        * WebPreferenceKeysPrivate.h:
>+        * WebPreferences.cpp:
>+        (WebPreferences::initializeDefaultSettings):
>+        (WebPreferences::overscrollCustomizationEnabled):
>+        (WebPreferences::setOverscrollCustomizationEnabled):
>+        * WebPreferences.h:
>+        * WebView.cpp:
>+        (WebView::notifyPreferencesChanged):
>+
> 2020-03-09  Rob Buis  <rbuis@igalia.com>
> 
>         Rename urlSelected to changeLocation
>diff --git a/Source/JavaScriptCore/Configurations/FeatureDefines.xcconfig b/Source/JavaScriptCore/Configurations/FeatureDefines.xcconfig
>index af9c12646c7fab536d8ba3285352119497b4d332..b4855de0c5233d139956a65ce0113150cd9b0d56 100644
>--- a/Source/JavaScriptCore/Configurations/FeatureDefines.xcconfig
>+++ b/Source/JavaScriptCore/Configurations/FeatureDefines.xcconfig
>@@ -301,6 +301,8 @@ ENABLE_OFFSCREEN_CANVAS = ;
> ENABLE_OVERFLOW_SCROLLING_TOUCH = $(ENABLE_OVERFLOW_SCROLLING_TOUCH_$(WK_COCOA_TOUCH));
> ENABLE_OVERFLOW_SCROLLING_TOUCH_cocoatouch = ENABLE_OVERFLOW_SCROLLING_TOUCH;
> 
>+ENABLE_OVERSCROLL_CUSTOMIZATION = ENABLE_OVERSCROLL_CUSTOMIZATION;
>+
> ENABLE_PAYMENT_REQUEST = ENABLE_PAYMENT_REQUEST;
> 
> ENABLE_PICTURE_IN_PICTURE_API = $(ENABLE_PICTURE_IN_PICTURE_API_$(WK_PLATFORM_NAME));
>@@ -430,4 +432,4 @@ ENABLE_WIRELESS_PLAYBACK_TARGET = ENABLE_WIRELESS_PLAYBACK_TARGET;
> 
> ENABLE_XSLT = ENABLE_XSLT;
> 
>-FEATURE_DEFINES = $(ENABLE_3D_TRANSFORMS) $(ENABLE_ACCELERATED_2D_CANVAS) $(ENABLE_ACCESSIBILITY_ISOLATED_TREE) $(ENABLE_APPLE_PAY) $(ENABLE_APPLE_PAY_SESSION_V3) $(ENABLE_APPLE_PAY_SESSION_V4) $(ENABLE_APPLE_PAY_SESSION_V9) $(ENABLE_APPLICATION_MANIFEST) $(ENABLE_ATTACHMENT_ELEMENT) $(ENABLE_AVF_CAPTIONS) $(ENABLE_CACHE_PARTITIONING) $(ENABLE_CHANNEL_MESSAGING) $(ENABLE_CONTENT_FILTERING) $(ENABLE_CSS3_TEXT) $(ENABLE_CSS_BOX_DECORATION_BREAK) $(ENABLE_CSS_COMPOSITING) $(ENABLE_CSS_CONIC_GRADIENTS) $(ENABLE_CSS_IMAGE_RESOLUTION) $(ENABLE_CSS_PAINTING_API) $(ENABLE_CSS_SCROLL_SNAP) $(ENABLE_CSS_SELECTORS_LEVEL4) $(ENABLE_CSS_TRAILING_WORD) $(ENABLE_CSS_TYPED_OM) $(ENABLE_CURSOR_VISIBILITY) $(ENABLE_CUSTOM_SCHEME_HANDLER) $(ENABLE_C_LOOP) $(ENABLE_DARK_MODE_CSS) $(ENABLE_DATACUE_VALUE) $(ENABLE_DATALIST_ELEMENT) $(ENABLE_DATA_INTERACTION) $(ENABLE_DEVICE_ORIENTATION) $(ENABLE_DRAG_SUPPORT) $(ENABLE_ENCRYPTED_MEDIA) $(ENABLE_EXPERIMENTAL_FEATURES) $(ENABLE_FILTERS_LEVEL_2) $(ENABLE_FULLSCREEN_API) $(ENABLE_PICTURE_IN_PICTURE_API) $(ENABLE_GAMEPAD) $(ENABLE_GEOLOCATION) $(ENABLE_GPU_PROCESS) $(ENABLE_INDEXED_DATABASE) $(ENABLE_INDEXED_DATABASE_IN_WORKERS) $(ENABLE_INPUT_TYPE_COLOR) $(ENABLE_INPUT_TYPE_DATE) $(ENABLE_INPUT_TYPE_DATETIMELOCAL) $(ENABLE_INPUT_TYPE_DATETIME_INCOMPLETE) $(ENABLE_INPUT_TYPE_MONTH) $(ENABLE_INPUT_TYPE_TIME) $(ENABLE_INPUT_TYPE_WEEK) $(ENABLE_INSPECTOR_ALTERNATE_DISPATCHERS) $(ENABLE_INSPECTOR_TELEMETRY) $(ENABLE_INTERSECTION_OBSERVER) $(ENABLE_IOS_GESTURE_EVENTS) $(ENABLE_IOS_TOUCH_EVENTS) $(ENABLE_LAYOUT_FORMATTING_CONTEXT) $(ENABLE_LEGACY_CSS_VENDOR_PREFIXES) $(ENABLE_LEGACY_CUSTOM_PROTOCOL_MANAGER) $(ENABLE_LEGACY_ENCRYPTED_MEDIA) $(ENABLE_LETTERPRESS) $(ENABLE_MAC_GESTURE_EVENTS) $(ENABLE_MAC_VIDEO_TOOLBOX) $(ENABLE_MATHML) $(ENABLE_MEDIA_CAPTURE) $(ENABLE_MEDIA_CONTROLS_SCRIPT) $(ENABLE_MEDIA_SESSION) $(ENABLE_MEDIA_SOURCE) $(ENABLE_MEDIA_STATISTICS) $(ENABLE_MEDIA_STREAM) $(ENABLE_MEMORY_SAMPLER) $(ENABLE_METER_ELEMENT) $(ENABLE_MHTML) $(ENABLE_MOUSE_CURSOR_SCALE) $(ENABLE_NAVIGATOR_STANDALONE) $(ENABLE_NETWORK_CACHE_SPECULATIVE_REVALIDATION) $(ENABLE_NETWORK_CACHE_STALE_WHILE_REVALIDATE) $(ENABLE_NOTIFICATIONS) $(ENABLE_OFFSCREEN_CANVAS) $(ENABLE_OVERFLOW_SCROLLING_TOUCH) $(ENABLE_PAYMENT_REQUEST) $(ENABLE_PDFKIT_PLUGIN) $(ENABLE_POINTER_EVENTS) $(ENABLE_POINTER_LOCK) $(ENABLE_PUBLIC_SUFFIX_LIST) $(ENABLE_QUOTA) $(ENABLE_REMOTE_INSPECTOR) $(ENABLE_RESIZE_OBSERVER) $(ENABLE_RESOLUTION_MEDIA_QUERY) $(ENABLE_RESOURCE_LOAD_STATISTICS) $(ENABLE_RESOURCE_USAGE) $(ENABLE_RUBBER_BANDING) $(ENABLE_SANDBOX_EXTENSIONS) $(ENABLE_SERVER_PRECONNECT) $(ENABLE_SERVICE_CONTROLS) $(ENABLE_SERVICE_WORKER) $(ENABLE_SHAREABLE_RESOURCE) $(ENABLE_SPEECH_SYNTHESIS) $(ENABLE_STREAMS_API) $(ENABLE_SVG_FONTS) $(ENABLE_TELEPHONE_NUMBER_DETECTION) $(ENABLE_TEXT_AUTOSIZING) $(ENABLE_TOUCH_EVENTS) $(ENABLE_USERSELECT_ALL) $(ENABLE_USER_MESSAGE_HANDLERS) $(ENABLE_VARIATION_FONTS) $(ENABLE_VIDEO) $(ENABLE_VIDEO_PRESENTATION_MODE) $(ENABLE_VIDEO_TRACK) $(ENABLE_VIDEO_USES_ELEMENT_FULLSCREEN) $(ENABLE_WEBDRIVER_MOUSE_INTERACTIONS) $(ENABLE_WEBDRIVER_KEYBOARD_INTERACTIONS) $(ENABLE_WEBDRIVER_TOUCH_INTERACTIONS) $(ENABLE_WEBGL) $(ENABLE_WEBGL2) $(ENABLE_WEBGPU) $(ENABLE_WEB_API_STATISTICS) $(ENABLE_WEB_AUDIO) $(ENABLE_WEB_AUTHN) $(ENABLE_WEB_CRYPTO) $(ENABLE_WEB_RTC) $(ENABLE_WIRELESS_PLAYBACK_TARGET) $(ENABLE_XSLT);
>+FEATURE_DEFINES = $(ENABLE_3D_TRANSFORMS) $(ENABLE_ACCELERATED_2D_CANVAS) $(ENABLE_ACCESSIBILITY_ISOLATED_TREE) $(ENABLE_APPLE_PAY) $(ENABLE_APPLE_PAY_SESSION_V3) $(ENABLE_APPLE_PAY_SESSION_V4) $(ENABLE_APPLE_PAY_SESSION_V9) $(ENABLE_APPLICATION_MANIFEST) $(ENABLE_ATTACHMENT_ELEMENT) $(ENABLE_AVF_CAPTIONS) $(ENABLE_CACHE_PARTITIONING) $(ENABLE_CHANNEL_MESSAGING) $(ENABLE_CONTENT_FILTERING) $(ENABLE_CSS3_TEXT) $(ENABLE_CSS_BOX_DECORATION_BREAK) $(ENABLE_CSS_COMPOSITING) $(ENABLE_CSS_CONIC_GRADIENTS) $(ENABLE_CSS_IMAGE_RESOLUTION) $(ENABLE_CSS_PAINTING_API) $(ENABLE_CSS_SCROLL_SNAP) $(ENABLE_CSS_SELECTORS_LEVEL4) $(ENABLE_CSS_TRAILING_WORD) $(ENABLE_CSS_TYPED_OM) $(ENABLE_CURSOR_VISIBILITY) $(ENABLE_CUSTOM_SCHEME_HANDLER) $(ENABLE_C_LOOP) $(ENABLE_DARK_MODE_CSS) $(ENABLE_DATACUE_VALUE) $(ENABLE_DATALIST_ELEMENT) $(ENABLE_DATA_INTERACTION) $(ENABLE_DEVICE_ORIENTATION) $(ENABLE_DRAG_SUPPORT) $(ENABLE_ENCRYPTED_MEDIA) $(ENABLE_EXPERIMENTAL_FEATURES) $(ENABLE_FILTERS_LEVEL_2) $(ENABLE_FULLSCREEN_API) $(ENABLE_PICTURE_IN_PICTURE_API) $(ENABLE_GAMEPAD) $(ENABLE_GEOLOCATION) $(ENABLE_GPU_PROCESS) $(ENABLE_INDEXED_DATABASE) $(ENABLE_INDEXED_DATABASE_IN_WORKERS) $(ENABLE_INPUT_TYPE_COLOR) $(ENABLE_INPUT_TYPE_DATE) $(ENABLE_INPUT_TYPE_DATETIMELOCAL) $(ENABLE_INPUT_TYPE_DATETIME_INCOMPLETE) $(ENABLE_INPUT_TYPE_MONTH) $(ENABLE_INPUT_TYPE_TIME) $(ENABLE_INPUT_TYPE_WEEK) $(ENABLE_INSPECTOR_ALTERNATE_DISPATCHERS) $(ENABLE_INSPECTOR_TELEMETRY) $(ENABLE_INTERSECTION_OBSERVER) $(ENABLE_IOS_GESTURE_EVENTS) $(ENABLE_IOS_TOUCH_EVENTS) $(ENABLE_LAYOUT_FORMATTING_CONTEXT) $(ENABLE_LEGACY_CSS_VENDOR_PREFIXES) $(ENABLE_LEGACY_CUSTOM_PROTOCOL_MANAGER) $(ENABLE_LEGACY_ENCRYPTED_MEDIA) $(ENABLE_LETTERPRESS) $(ENABLE_MAC_GESTURE_EVENTS) $(ENABLE_MAC_VIDEO_TOOLBOX) $(ENABLE_MATHML) $(ENABLE_MEDIA_CAPTURE) $(ENABLE_MEDIA_CONTROLS_SCRIPT) $(ENABLE_MEDIA_SESSION) $(ENABLE_MEDIA_SOURCE) $(ENABLE_MEDIA_STATISTICS) $(ENABLE_MEDIA_STREAM) $(ENABLE_MEMORY_SAMPLER) $(ENABLE_METER_ELEMENT) $(ENABLE_MHTML) $(ENABLE_MOUSE_CURSOR_SCALE) $(ENABLE_NAVIGATOR_STANDALONE) $(ENABLE_NETWORK_CACHE_SPECULATIVE_REVALIDATION) $(ENABLE_NETWORK_CACHE_STALE_WHILE_REVALIDATE) $(ENABLE_NOTIFICATIONS) $(ENABLE_OFFSCREEN_CANVAS) $(ENABLE_OVERFLOW_SCROLLING_TOUCH) $(ENABLE_OVERSCROLL_CUSTOMIZATION) $(ENABLE_PAYMENT_REQUEST) $(ENABLE_PDFKIT_PLUGIN) $(ENABLE_POINTER_EVENTS) $(ENABLE_POINTER_LOCK) $(ENABLE_PUBLIC_SUFFIX_LIST) $(ENABLE_QUOTA) $(ENABLE_REMOTE_INSPECTOR) $(ENABLE_RESIZE_OBSERVER) $(ENABLE_RESOLUTION_MEDIA_QUERY) $(ENABLE_RESOURCE_LOAD_STATISTICS) $(ENABLE_RESOURCE_USAGE) $(ENABLE_RUBBER_BANDING) $(ENABLE_SANDBOX_EXTENSIONS) $(ENABLE_SERVER_PRECONNECT) $(ENABLE_SERVICE_CONTROLS) $(ENABLE_SERVICE_WORKER) $(ENABLE_SHAREABLE_RESOURCE) $(ENABLE_SPEECH_SYNTHESIS) $(ENABLE_STREAMS_API) $(ENABLE_SVG_FONTS) $(ENABLE_TELEPHONE_NUMBER_DETECTION) $(ENABLE_TEXT_AUTOSIZING) $(ENABLE_TOUCH_EVENTS) $(ENABLE_USERSELECT_ALL) $(ENABLE_USER_MESSAGE_HANDLERS) $(ENABLE_VARIATION_FONTS) $(ENABLE_VIDEO) $(ENABLE_VIDEO_PRESENTATION_MODE) $(ENABLE_VIDEO_TRACK) $(ENABLE_VIDEO_USES_ELEMENT_FULLSCREEN) $(ENABLE_WEBDRIVER_MOUSE_INTERACTIONS) $(ENABLE_WEBDRIVER_KEYBOARD_INTERACTIONS) $(ENABLE_WEBDRIVER_TOUCH_INTERACTIONS) $(ENABLE_WEBGL) $(ENABLE_WEBGL2) $(ENABLE_WEBGPU) $(ENABLE_WEB_API_STATISTICS) $(ENABLE_WEB_AUDIO) $(ENABLE_WEB_AUTHN) $(ENABLE_WEB_CRYPTO) $(ENABLE_WEB_RTC) $(ENABLE_WIRELESS_PLAYBACK_TARGET) $(ENABLE_XSLT);
>diff --git a/Source/WebCore/Configurations/FeatureDefines.xcconfig b/Source/WebCore/Configurations/FeatureDefines.xcconfig
>index af9c12646c7fab536d8ba3285352119497b4d332..b4855de0c5233d139956a65ce0113150cd9b0d56 100644
>--- a/Source/WebCore/Configurations/FeatureDefines.xcconfig
>+++ b/Source/WebCore/Configurations/FeatureDefines.xcconfig
>@@ -301,6 +301,8 @@ ENABLE_OFFSCREEN_CANVAS = ;
> ENABLE_OVERFLOW_SCROLLING_TOUCH = $(ENABLE_OVERFLOW_SCROLLING_TOUCH_$(WK_COCOA_TOUCH));
> ENABLE_OVERFLOW_SCROLLING_TOUCH_cocoatouch = ENABLE_OVERFLOW_SCROLLING_TOUCH;
> 
>+ENABLE_OVERSCROLL_CUSTOMIZATION = ENABLE_OVERSCROLL_CUSTOMIZATION;
>+
> ENABLE_PAYMENT_REQUEST = ENABLE_PAYMENT_REQUEST;
> 
> ENABLE_PICTURE_IN_PICTURE_API = $(ENABLE_PICTURE_IN_PICTURE_API_$(WK_PLATFORM_NAME));
>@@ -430,4 +432,4 @@ ENABLE_WIRELESS_PLAYBACK_TARGET = ENABLE_WIRELESS_PLAYBACK_TARGET;
> 
> ENABLE_XSLT = ENABLE_XSLT;
> 
>-FEATURE_DEFINES = $(ENABLE_3D_TRANSFORMS) $(ENABLE_ACCELERATED_2D_CANVAS) $(ENABLE_ACCESSIBILITY_ISOLATED_TREE) $(ENABLE_APPLE_PAY) $(ENABLE_APPLE_PAY_SESSION_V3) $(ENABLE_APPLE_PAY_SESSION_V4) $(ENABLE_APPLE_PAY_SESSION_V9) $(ENABLE_APPLICATION_MANIFEST) $(ENABLE_ATTACHMENT_ELEMENT) $(ENABLE_AVF_CAPTIONS) $(ENABLE_CACHE_PARTITIONING) $(ENABLE_CHANNEL_MESSAGING) $(ENABLE_CONTENT_FILTERING) $(ENABLE_CSS3_TEXT) $(ENABLE_CSS_BOX_DECORATION_BREAK) $(ENABLE_CSS_COMPOSITING) $(ENABLE_CSS_CONIC_GRADIENTS) $(ENABLE_CSS_IMAGE_RESOLUTION) $(ENABLE_CSS_PAINTING_API) $(ENABLE_CSS_SCROLL_SNAP) $(ENABLE_CSS_SELECTORS_LEVEL4) $(ENABLE_CSS_TRAILING_WORD) $(ENABLE_CSS_TYPED_OM) $(ENABLE_CURSOR_VISIBILITY) $(ENABLE_CUSTOM_SCHEME_HANDLER) $(ENABLE_C_LOOP) $(ENABLE_DARK_MODE_CSS) $(ENABLE_DATACUE_VALUE) $(ENABLE_DATALIST_ELEMENT) $(ENABLE_DATA_INTERACTION) $(ENABLE_DEVICE_ORIENTATION) $(ENABLE_DRAG_SUPPORT) $(ENABLE_ENCRYPTED_MEDIA) $(ENABLE_EXPERIMENTAL_FEATURES) $(ENABLE_FILTERS_LEVEL_2) $(ENABLE_FULLSCREEN_API) $(ENABLE_PICTURE_IN_PICTURE_API) $(ENABLE_GAMEPAD) $(ENABLE_GEOLOCATION) $(ENABLE_GPU_PROCESS) $(ENABLE_INDEXED_DATABASE) $(ENABLE_INDEXED_DATABASE_IN_WORKERS) $(ENABLE_INPUT_TYPE_COLOR) $(ENABLE_INPUT_TYPE_DATE) $(ENABLE_INPUT_TYPE_DATETIMELOCAL) $(ENABLE_INPUT_TYPE_DATETIME_INCOMPLETE) $(ENABLE_INPUT_TYPE_MONTH) $(ENABLE_INPUT_TYPE_TIME) $(ENABLE_INPUT_TYPE_WEEK) $(ENABLE_INSPECTOR_ALTERNATE_DISPATCHERS) $(ENABLE_INSPECTOR_TELEMETRY) $(ENABLE_INTERSECTION_OBSERVER) $(ENABLE_IOS_GESTURE_EVENTS) $(ENABLE_IOS_TOUCH_EVENTS) $(ENABLE_LAYOUT_FORMATTING_CONTEXT) $(ENABLE_LEGACY_CSS_VENDOR_PREFIXES) $(ENABLE_LEGACY_CUSTOM_PROTOCOL_MANAGER) $(ENABLE_LEGACY_ENCRYPTED_MEDIA) $(ENABLE_LETTERPRESS) $(ENABLE_MAC_GESTURE_EVENTS) $(ENABLE_MAC_VIDEO_TOOLBOX) $(ENABLE_MATHML) $(ENABLE_MEDIA_CAPTURE) $(ENABLE_MEDIA_CONTROLS_SCRIPT) $(ENABLE_MEDIA_SESSION) $(ENABLE_MEDIA_SOURCE) $(ENABLE_MEDIA_STATISTICS) $(ENABLE_MEDIA_STREAM) $(ENABLE_MEMORY_SAMPLER) $(ENABLE_METER_ELEMENT) $(ENABLE_MHTML) $(ENABLE_MOUSE_CURSOR_SCALE) $(ENABLE_NAVIGATOR_STANDALONE) $(ENABLE_NETWORK_CACHE_SPECULATIVE_REVALIDATION) $(ENABLE_NETWORK_CACHE_STALE_WHILE_REVALIDATE) $(ENABLE_NOTIFICATIONS) $(ENABLE_OFFSCREEN_CANVAS) $(ENABLE_OVERFLOW_SCROLLING_TOUCH) $(ENABLE_PAYMENT_REQUEST) $(ENABLE_PDFKIT_PLUGIN) $(ENABLE_POINTER_EVENTS) $(ENABLE_POINTER_LOCK) $(ENABLE_PUBLIC_SUFFIX_LIST) $(ENABLE_QUOTA) $(ENABLE_REMOTE_INSPECTOR) $(ENABLE_RESIZE_OBSERVER) $(ENABLE_RESOLUTION_MEDIA_QUERY) $(ENABLE_RESOURCE_LOAD_STATISTICS) $(ENABLE_RESOURCE_USAGE) $(ENABLE_RUBBER_BANDING) $(ENABLE_SANDBOX_EXTENSIONS) $(ENABLE_SERVER_PRECONNECT) $(ENABLE_SERVICE_CONTROLS) $(ENABLE_SERVICE_WORKER) $(ENABLE_SHAREABLE_RESOURCE) $(ENABLE_SPEECH_SYNTHESIS) $(ENABLE_STREAMS_API) $(ENABLE_SVG_FONTS) $(ENABLE_TELEPHONE_NUMBER_DETECTION) $(ENABLE_TEXT_AUTOSIZING) $(ENABLE_TOUCH_EVENTS) $(ENABLE_USERSELECT_ALL) $(ENABLE_USER_MESSAGE_HANDLERS) $(ENABLE_VARIATION_FONTS) $(ENABLE_VIDEO) $(ENABLE_VIDEO_PRESENTATION_MODE) $(ENABLE_VIDEO_TRACK) $(ENABLE_VIDEO_USES_ELEMENT_FULLSCREEN) $(ENABLE_WEBDRIVER_MOUSE_INTERACTIONS) $(ENABLE_WEBDRIVER_KEYBOARD_INTERACTIONS) $(ENABLE_WEBDRIVER_TOUCH_INTERACTIONS) $(ENABLE_WEBGL) $(ENABLE_WEBGL2) $(ENABLE_WEBGPU) $(ENABLE_WEB_API_STATISTICS) $(ENABLE_WEB_AUDIO) $(ENABLE_WEB_AUTHN) $(ENABLE_WEB_CRYPTO) $(ENABLE_WEB_RTC) $(ENABLE_WIRELESS_PLAYBACK_TARGET) $(ENABLE_XSLT);
>+FEATURE_DEFINES = $(ENABLE_3D_TRANSFORMS) $(ENABLE_ACCELERATED_2D_CANVAS) $(ENABLE_ACCESSIBILITY_ISOLATED_TREE) $(ENABLE_APPLE_PAY) $(ENABLE_APPLE_PAY_SESSION_V3) $(ENABLE_APPLE_PAY_SESSION_V4) $(ENABLE_APPLE_PAY_SESSION_V9) $(ENABLE_APPLICATION_MANIFEST) $(ENABLE_ATTACHMENT_ELEMENT) $(ENABLE_AVF_CAPTIONS) $(ENABLE_CACHE_PARTITIONING) $(ENABLE_CHANNEL_MESSAGING) $(ENABLE_CONTENT_FILTERING) $(ENABLE_CSS3_TEXT) $(ENABLE_CSS_BOX_DECORATION_BREAK) $(ENABLE_CSS_COMPOSITING) $(ENABLE_CSS_CONIC_GRADIENTS) $(ENABLE_CSS_IMAGE_RESOLUTION) $(ENABLE_CSS_PAINTING_API) $(ENABLE_CSS_SCROLL_SNAP) $(ENABLE_CSS_SELECTORS_LEVEL4) $(ENABLE_CSS_TRAILING_WORD) $(ENABLE_CSS_TYPED_OM) $(ENABLE_CURSOR_VISIBILITY) $(ENABLE_CUSTOM_SCHEME_HANDLER) $(ENABLE_C_LOOP) $(ENABLE_DARK_MODE_CSS) $(ENABLE_DATACUE_VALUE) $(ENABLE_DATALIST_ELEMENT) $(ENABLE_DATA_INTERACTION) $(ENABLE_DEVICE_ORIENTATION) $(ENABLE_DRAG_SUPPORT) $(ENABLE_ENCRYPTED_MEDIA) $(ENABLE_EXPERIMENTAL_FEATURES) $(ENABLE_FILTERS_LEVEL_2) $(ENABLE_FULLSCREEN_API) $(ENABLE_PICTURE_IN_PICTURE_API) $(ENABLE_GAMEPAD) $(ENABLE_GEOLOCATION) $(ENABLE_GPU_PROCESS) $(ENABLE_INDEXED_DATABASE) $(ENABLE_INDEXED_DATABASE_IN_WORKERS) $(ENABLE_INPUT_TYPE_COLOR) $(ENABLE_INPUT_TYPE_DATE) $(ENABLE_INPUT_TYPE_DATETIMELOCAL) $(ENABLE_INPUT_TYPE_DATETIME_INCOMPLETE) $(ENABLE_INPUT_TYPE_MONTH) $(ENABLE_INPUT_TYPE_TIME) $(ENABLE_INPUT_TYPE_WEEK) $(ENABLE_INSPECTOR_ALTERNATE_DISPATCHERS) $(ENABLE_INSPECTOR_TELEMETRY) $(ENABLE_INTERSECTION_OBSERVER) $(ENABLE_IOS_GESTURE_EVENTS) $(ENABLE_IOS_TOUCH_EVENTS) $(ENABLE_LAYOUT_FORMATTING_CONTEXT) $(ENABLE_LEGACY_CSS_VENDOR_PREFIXES) $(ENABLE_LEGACY_CUSTOM_PROTOCOL_MANAGER) $(ENABLE_LEGACY_ENCRYPTED_MEDIA) $(ENABLE_LETTERPRESS) $(ENABLE_MAC_GESTURE_EVENTS) $(ENABLE_MAC_VIDEO_TOOLBOX) $(ENABLE_MATHML) $(ENABLE_MEDIA_CAPTURE) $(ENABLE_MEDIA_CONTROLS_SCRIPT) $(ENABLE_MEDIA_SESSION) $(ENABLE_MEDIA_SOURCE) $(ENABLE_MEDIA_STATISTICS) $(ENABLE_MEDIA_STREAM) $(ENABLE_MEMORY_SAMPLER) $(ENABLE_METER_ELEMENT) $(ENABLE_MHTML) $(ENABLE_MOUSE_CURSOR_SCALE) $(ENABLE_NAVIGATOR_STANDALONE) $(ENABLE_NETWORK_CACHE_SPECULATIVE_REVALIDATION) $(ENABLE_NETWORK_CACHE_STALE_WHILE_REVALIDATE) $(ENABLE_NOTIFICATIONS) $(ENABLE_OFFSCREEN_CANVAS) $(ENABLE_OVERFLOW_SCROLLING_TOUCH) $(ENABLE_OVERSCROLL_CUSTOMIZATION) $(ENABLE_PAYMENT_REQUEST) $(ENABLE_PDFKIT_PLUGIN) $(ENABLE_POINTER_EVENTS) $(ENABLE_POINTER_LOCK) $(ENABLE_PUBLIC_SUFFIX_LIST) $(ENABLE_QUOTA) $(ENABLE_REMOTE_INSPECTOR) $(ENABLE_RESIZE_OBSERVER) $(ENABLE_RESOLUTION_MEDIA_QUERY) $(ENABLE_RESOURCE_LOAD_STATISTICS) $(ENABLE_RESOURCE_USAGE) $(ENABLE_RUBBER_BANDING) $(ENABLE_SANDBOX_EXTENSIONS) $(ENABLE_SERVER_PRECONNECT) $(ENABLE_SERVICE_CONTROLS) $(ENABLE_SERVICE_WORKER) $(ENABLE_SHAREABLE_RESOURCE) $(ENABLE_SPEECH_SYNTHESIS) $(ENABLE_STREAMS_API) $(ENABLE_SVG_FONTS) $(ENABLE_TELEPHONE_NUMBER_DETECTION) $(ENABLE_TEXT_AUTOSIZING) $(ENABLE_TOUCH_EVENTS) $(ENABLE_USERSELECT_ALL) $(ENABLE_USER_MESSAGE_HANDLERS) $(ENABLE_VARIATION_FONTS) $(ENABLE_VIDEO) $(ENABLE_VIDEO_PRESENTATION_MODE) $(ENABLE_VIDEO_TRACK) $(ENABLE_VIDEO_USES_ELEMENT_FULLSCREEN) $(ENABLE_WEBDRIVER_MOUSE_INTERACTIONS) $(ENABLE_WEBDRIVER_KEYBOARD_INTERACTIONS) $(ENABLE_WEBDRIVER_TOUCH_INTERACTIONS) $(ENABLE_WEBGL) $(ENABLE_WEBGL2) $(ENABLE_WEBGPU) $(ENABLE_WEB_API_STATISTICS) $(ENABLE_WEB_AUDIO) $(ENABLE_WEB_AUTHN) $(ENABLE_WEB_CRYPTO) $(ENABLE_WEB_RTC) $(ENABLE_WIRELESS_PLAYBACK_TARGET) $(ENABLE_XSLT);
>diff --git a/Source/WebCore/PAL/Configurations/FeatureDefines.xcconfig b/Source/WebCore/PAL/Configurations/FeatureDefines.xcconfig
>index af9c12646c7fab536d8ba3285352119497b4d332..b4855de0c5233d139956a65ce0113150cd9b0d56 100644
>--- a/Source/WebCore/PAL/Configurations/FeatureDefines.xcconfig
>+++ b/Source/WebCore/PAL/Configurations/FeatureDefines.xcconfig
>@@ -301,6 +301,8 @@ ENABLE_OFFSCREEN_CANVAS = ;
> ENABLE_OVERFLOW_SCROLLING_TOUCH = $(ENABLE_OVERFLOW_SCROLLING_TOUCH_$(WK_COCOA_TOUCH));
> ENABLE_OVERFLOW_SCROLLING_TOUCH_cocoatouch = ENABLE_OVERFLOW_SCROLLING_TOUCH;
> 
>+ENABLE_OVERSCROLL_CUSTOMIZATION = ENABLE_OVERSCROLL_CUSTOMIZATION;
>+
> ENABLE_PAYMENT_REQUEST = ENABLE_PAYMENT_REQUEST;
> 
> ENABLE_PICTURE_IN_PICTURE_API = $(ENABLE_PICTURE_IN_PICTURE_API_$(WK_PLATFORM_NAME));
>@@ -430,4 +432,4 @@ ENABLE_WIRELESS_PLAYBACK_TARGET = ENABLE_WIRELESS_PLAYBACK_TARGET;
> 
> ENABLE_XSLT = ENABLE_XSLT;
> 
>-FEATURE_DEFINES = $(ENABLE_3D_TRANSFORMS) $(ENABLE_ACCELERATED_2D_CANVAS) $(ENABLE_ACCESSIBILITY_ISOLATED_TREE) $(ENABLE_APPLE_PAY) $(ENABLE_APPLE_PAY_SESSION_V3) $(ENABLE_APPLE_PAY_SESSION_V4) $(ENABLE_APPLE_PAY_SESSION_V9) $(ENABLE_APPLICATION_MANIFEST) $(ENABLE_ATTACHMENT_ELEMENT) $(ENABLE_AVF_CAPTIONS) $(ENABLE_CACHE_PARTITIONING) $(ENABLE_CHANNEL_MESSAGING) $(ENABLE_CONTENT_FILTERING) $(ENABLE_CSS3_TEXT) $(ENABLE_CSS_BOX_DECORATION_BREAK) $(ENABLE_CSS_COMPOSITING) $(ENABLE_CSS_CONIC_GRADIENTS) $(ENABLE_CSS_IMAGE_RESOLUTION) $(ENABLE_CSS_PAINTING_API) $(ENABLE_CSS_SCROLL_SNAP) $(ENABLE_CSS_SELECTORS_LEVEL4) $(ENABLE_CSS_TRAILING_WORD) $(ENABLE_CSS_TYPED_OM) $(ENABLE_CURSOR_VISIBILITY) $(ENABLE_CUSTOM_SCHEME_HANDLER) $(ENABLE_C_LOOP) $(ENABLE_DARK_MODE_CSS) $(ENABLE_DATACUE_VALUE) $(ENABLE_DATALIST_ELEMENT) $(ENABLE_DATA_INTERACTION) $(ENABLE_DEVICE_ORIENTATION) $(ENABLE_DRAG_SUPPORT) $(ENABLE_ENCRYPTED_MEDIA) $(ENABLE_EXPERIMENTAL_FEATURES) $(ENABLE_FILTERS_LEVEL_2) $(ENABLE_FULLSCREEN_API) $(ENABLE_PICTURE_IN_PICTURE_API) $(ENABLE_GAMEPAD) $(ENABLE_GEOLOCATION) $(ENABLE_GPU_PROCESS) $(ENABLE_INDEXED_DATABASE) $(ENABLE_INDEXED_DATABASE_IN_WORKERS) $(ENABLE_INPUT_TYPE_COLOR) $(ENABLE_INPUT_TYPE_DATE) $(ENABLE_INPUT_TYPE_DATETIMELOCAL) $(ENABLE_INPUT_TYPE_DATETIME_INCOMPLETE) $(ENABLE_INPUT_TYPE_MONTH) $(ENABLE_INPUT_TYPE_TIME) $(ENABLE_INPUT_TYPE_WEEK) $(ENABLE_INSPECTOR_ALTERNATE_DISPATCHERS) $(ENABLE_INSPECTOR_TELEMETRY) $(ENABLE_INTERSECTION_OBSERVER) $(ENABLE_IOS_GESTURE_EVENTS) $(ENABLE_IOS_TOUCH_EVENTS) $(ENABLE_LAYOUT_FORMATTING_CONTEXT) $(ENABLE_LEGACY_CSS_VENDOR_PREFIXES) $(ENABLE_LEGACY_CUSTOM_PROTOCOL_MANAGER) $(ENABLE_LEGACY_ENCRYPTED_MEDIA) $(ENABLE_LETTERPRESS) $(ENABLE_MAC_GESTURE_EVENTS) $(ENABLE_MAC_VIDEO_TOOLBOX) $(ENABLE_MATHML) $(ENABLE_MEDIA_CAPTURE) $(ENABLE_MEDIA_CONTROLS_SCRIPT) $(ENABLE_MEDIA_SESSION) $(ENABLE_MEDIA_SOURCE) $(ENABLE_MEDIA_STATISTICS) $(ENABLE_MEDIA_STREAM) $(ENABLE_MEMORY_SAMPLER) $(ENABLE_METER_ELEMENT) $(ENABLE_MHTML) $(ENABLE_MOUSE_CURSOR_SCALE) $(ENABLE_NAVIGATOR_STANDALONE) $(ENABLE_NETWORK_CACHE_SPECULATIVE_REVALIDATION) $(ENABLE_NETWORK_CACHE_STALE_WHILE_REVALIDATE) $(ENABLE_NOTIFICATIONS) $(ENABLE_OFFSCREEN_CANVAS) $(ENABLE_OVERFLOW_SCROLLING_TOUCH) $(ENABLE_PAYMENT_REQUEST) $(ENABLE_PDFKIT_PLUGIN) $(ENABLE_POINTER_EVENTS) $(ENABLE_POINTER_LOCK) $(ENABLE_PUBLIC_SUFFIX_LIST) $(ENABLE_QUOTA) $(ENABLE_REMOTE_INSPECTOR) $(ENABLE_RESIZE_OBSERVER) $(ENABLE_RESOLUTION_MEDIA_QUERY) $(ENABLE_RESOURCE_LOAD_STATISTICS) $(ENABLE_RESOURCE_USAGE) $(ENABLE_RUBBER_BANDING) $(ENABLE_SANDBOX_EXTENSIONS) $(ENABLE_SERVER_PRECONNECT) $(ENABLE_SERVICE_CONTROLS) $(ENABLE_SERVICE_WORKER) $(ENABLE_SHAREABLE_RESOURCE) $(ENABLE_SPEECH_SYNTHESIS) $(ENABLE_STREAMS_API) $(ENABLE_SVG_FONTS) $(ENABLE_TELEPHONE_NUMBER_DETECTION) $(ENABLE_TEXT_AUTOSIZING) $(ENABLE_TOUCH_EVENTS) $(ENABLE_USERSELECT_ALL) $(ENABLE_USER_MESSAGE_HANDLERS) $(ENABLE_VARIATION_FONTS) $(ENABLE_VIDEO) $(ENABLE_VIDEO_PRESENTATION_MODE) $(ENABLE_VIDEO_TRACK) $(ENABLE_VIDEO_USES_ELEMENT_FULLSCREEN) $(ENABLE_WEBDRIVER_MOUSE_INTERACTIONS) $(ENABLE_WEBDRIVER_KEYBOARD_INTERACTIONS) $(ENABLE_WEBDRIVER_TOUCH_INTERACTIONS) $(ENABLE_WEBGL) $(ENABLE_WEBGL2) $(ENABLE_WEBGPU) $(ENABLE_WEB_API_STATISTICS) $(ENABLE_WEB_AUDIO) $(ENABLE_WEB_AUTHN) $(ENABLE_WEB_CRYPTO) $(ENABLE_WEB_RTC) $(ENABLE_WIRELESS_PLAYBACK_TARGET) $(ENABLE_XSLT);
>+FEATURE_DEFINES = $(ENABLE_3D_TRANSFORMS) $(ENABLE_ACCELERATED_2D_CANVAS) $(ENABLE_ACCESSIBILITY_ISOLATED_TREE) $(ENABLE_APPLE_PAY) $(ENABLE_APPLE_PAY_SESSION_V3) $(ENABLE_APPLE_PAY_SESSION_V4) $(ENABLE_APPLE_PAY_SESSION_V9) $(ENABLE_APPLICATION_MANIFEST) $(ENABLE_ATTACHMENT_ELEMENT) $(ENABLE_AVF_CAPTIONS) $(ENABLE_CACHE_PARTITIONING) $(ENABLE_CHANNEL_MESSAGING) $(ENABLE_CONTENT_FILTERING) $(ENABLE_CSS3_TEXT) $(ENABLE_CSS_BOX_DECORATION_BREAK) $(ENABLE_CSS_COMPOSITING) $(ENABLE_CSS_CONIC_GRADIENTS) $(ENABLE_CSS_IMAGE_RESOLUTION) $(ENABLE_CSS_PAINTING_API) $(ENABLE_CSS_SCROLL_SNAP) $(ENABLE_CSS_SELECTORS_LEVEL4) $(ENABLE_CSS_TRAILING_WORD) $(ENABLE_CSS_TYPED_OM) $(ENABLE_CURSOR_VISIBILITY) $(ENABLE_CUSTOM_SCHEME_HANDLER) $(ENABLE_C_LOOP) $(ENABLE_DARK_MODE_CSS) $(ENABLE_DATACUE_VALUE) $(ENABLE_DATALIST_ELEMENT) $(ENABLE_DATA_INTERACTION) $(ENABLE_DEVICE_ORIENTATION) $(ENABLE_DRAG_SUPPORT) $(ENABLE_ENCRYPTED_MEDIA) $(ENABLE_EXPERIMENTAL_FEATURES) $(ENABLE_FILTERS_LEVEL_2) $(ENABLE_FULLSCREEN_API) $(ENABLE_PICTURE_IN_PICTURE_API) $(ENABLE_GAMEPAD) $(ENABLE_GEOLOCATION) $(ENABLE_GPU_PROCESS) $(ENABLE_INDEXED_DATABASE) $(ENABLE_INDEXED_DATABASE_IN_WORKERS) $(ENABLE_INPUT_TYPE_COLOR) $(ENABLE_INPUT_TYPE_DATE) $(ENABLE_INPUT_TYPE_DATETIMELOCAL) $(ENABLE_INPUT_TYPE_DATETIME_INCOMPLETE) $(ENABLE_INPUT_TYPE_MONTH) $(ENABLE_INPUT_TYPE_TIME) $(ENABLE_INPUT_TYPE_WEEK) $(ENABLE_INSPECTOR_ALTERNATE_DISPATCHERS) $(ENABLE_INSPECTOR_TELEMETRY) $(ENABLE_INTERSECTION_OBSERVER) $(ENABLE_IOS_GESTURE_EVENTS) $(ENABLE_IOS_TOUCH_EVENTS) $(ENABLE_LAYOUT_FORMATTING_CONTEXT) $(ENABLE_LEGACY_CSS_VENDOR_PREFIXES) $(ENABLE_LEGACY_CUSTOM_PROTOCOL_MANAGER) $(ENABLE_LEGACY_ENCRYPTED_MEDIA) $(ENABLE_LETTERPRESS) $(ENABLE_MAC_GESTURE_EVENTS) $(ENABLE_MAC_VIDEO_TOOLBOX) $(ENABLE_MATHML) $(ENABLE_MEDIA_CAPTURE) $(ENABLE_MEDIA_CONTROLS_SCRIPT) $(ENABLE_MEDIA_SESSION) $(ENABLE_MEDIA_SOURCE) $(ENABLE_MEDIA_STATISTICS) $(ENABLE_MEDIA_STREAM) $(ENABLE_MEMORY_SAMPLER) $(ENABLE_METER_ELEMENT) $(ENABLE_MHTML) $(ENABLE_MOUSE_CURSOR_SCALE) $(ENABLE_NAVIGATOR_STANDALONE) $(ENABLE_NETWORK_CACHE_SPECULATIVE_REVALIDATION) $(ENABLE_NETWORK_CACHE_STALE_WHILE_REVALIDATE) $(ENABLE_NOTIFICATIONS) $(ENABLE_OFFSCREEN_CANVAS) $(ENABLE_OVERFLOW_SCROLLING_TOUCH) $(ENABLE_OVERSCROLL_CUSTOMIZATION) $(ENABLE_PAYMENT_REQUEST) $(ENABLE_PDFKIT_PLUGIN) $(ENABLE_POINTER_EVENTS) $(ENABLE_POINTER_LOCK) $(ENABLE_PUBLIC_SUFFIX_LIST) $(ENABLE_QUOTA) $(ENABLE_REMOTE_INSPECTOR) $(ENABLE_RESIZE_OBSERVER) $(ENABLE_RESOLUTION_MEDIA_QUERY) $(ENABLE_RESOURCE_LOAD_STATISTICS) $(ENABLE_RESOURCE_USAGE) $(ENABLE_RUBBER_BANDING) $(ENABLE_SANDBOX_EXTENSIONS) $(ENABLE_SERVER_PRECONNECT) $(ENABLE_SERVICE_CONTROLS) $(ENABLE_SERVICE_WORKER) $(ENABLE_SHAREABLE_RESOURCE) $(ENABLE_SPEECH_SYNTHESIS) $(ENABLE_STREAMS_API) $(ENABLE_SVG_FONTS) $(ENABLE_TELEPHONE_NUMBER_DETECTION) $(ENABLE_TEXT_AUTOSIZING) $(ENABLE_TOUCH_EVENTS) $(ENABLE_USERSELECT_ALL) $(ENABLE_USER_MESSAGE_HANDLERS) $(ENABLE_VARIATION_FONTS) $(ENABLE_VIDEO) $(ENABLE_VIDEO_PRESENTATION_MODE) $(ENABLE_VIDEO_TRACK) $(ENABLE_VIDEO_USES_ELEMENT_FULLSCREEN) $(ENABLE_WEBDRIVER_MOUSE_INTERACTIONS) $(ENABLE_WEBDRIVER_KEYBOARD_INTERACTIONS) $(ENABLE_WEBDRIVER_TOUCH_INTERACTIONS) $(ENABLE_WEBGL) $(ENABLE_WEBGL2) $(ENABLE_WEBGPU) $(ENABLE_WEB_API_STATISTICS) $(ENABLE_WEB_AUDIO) $(ENABLE_WEB_AUTHN) $(ENABLE_WEB_CRYPTO) $(ENABLE_WEB_RTC) $(ENABLE_WIRELESS_PLAYBACK_TARGET) $(ENABLE_XSLT);
>diff --git a/Source/WebCore/bindings/js/WebCoreBuiltinNames.h b/Source/WebCore/bindings/js/WebCoreBuiltinNames.h
>index 44d50b207c538a19792b4f3226afe65287787209..a795f4bb97ec01dbc42f78c4c70f0895a8a8f744 100644
>--- a/Source/WebCore/bindings/js/WebCoreBuiltinNames.h
>+++ b/Source/WebCore/bindings/js/WebCoreBuiltinNames.h
>@@ -285,6 +285,8 @@ namespace WebCore {
>     macro(matchingElementInFlatTree) \
>     macro(mediaStreamTrackConstraints) \
>     macro(openDatabase) \
>+    macro(onoverscroll) \
>+    macro(onscrollend) \
>     macro(ontouchcancel) \
>     macro(ontouchend) \
>     macro(ontouchmove) \
>diff --git a/Source/WebCore/dom/EventNames.h b/Source/WebCore/dom/EventNames.h
>index d4960b9cf751f411422b670841a05b8bd2c71c28..a985201c7c28bc11f6c78317cc747fa3bafc7b98 100644
>--- a/Source/WebCore/dom/EventNames.h
>+++ b/Source/WebCore/dom/EventNames.h
>@@ -190,6 +190,7 @@ namespace WebCore {
>     macro(orientationchange) \
>     macro(overconstrained) \
>     macro(overflowchanged) \
>+    macro(overscroll) \
>     macro(pagehide) \
>     macro(pageshow) \
>     macro(paste) \
>@@ -226,6 +227,7 @@ namespace WebCore {
>     macro(result) \
>     macro(resume) \
>     macro(scroll) \
>+    macro(scrollend) \
>     macro(search) \
>     macro(securitypolicyviolation) \
>     macro(seeked) \
>diff --git a/Source/WebCore/dom/GlobalEventHandlers.idl b/Source/WebCore/dom/GlobalEventHandlers.idl
>index 770aa9c3a7401a03873a7183a7192cee076570b0..6d97001f2453e48efac40f450e170af2c7b559be 100644
>--- a/Source/WebCore/dom/GlobalEventHandlers.idl
>+++ b/Source/WebCore/dom/GlobalEventHandlers.idl
>@@ -132,4 +132,8 @@
>     [NotEnumerable, Conditional=MOUSE_FORCE_EVENTS] attribute EventHandler onwebkitmouseforcedown;
>     [NotEnumerable, Conditional=MOUSE_FORCE_EVENTS] attribute EventHandler onwebkitmouseforcewillbegin;
>     [NotEnumerable, Conditional=MOUSE_FORCE_EVENTS] attribute EventHandler onwebkitmouseforceup;
>+
>+    // Event handlers from Overscroll Customization API (https://wicg.github.io/overscroll-scrollend-events/)
>+    [NotEnumerable, Conditional=OVERSCROLL_CUSTOMIZATION, EnabledBySetting=OverscrollCustomization] attribute EventHandler onoverscroll;
>+    [NotEnumerable, Conditional=OVERSCROLL_CUSTOMIZATION, EnabledBySetting=OverscrollCustomization] attribute EventHandler onscrollend;
> };
>diff --git a/Source/WebCore/html/HTMLAttributeNames.in b/Source/WebCore/html/HTMLAttributeNames.in
>index dcd8378d9541c7a39f83ba6cce841f87df3be3e1..099ffb8225c542fc82a417b5f4b88bdece5bdf53 100644
>--- a/Source/WebCore/html/HTMLAttributeNames.in
>+++ b/Source/WebCore/html/HTMLAttributeNames.in
>@@ -267,6 +267,7 @@ onmousewheel
> ononline
> onoffline
> onorientationchange
>+onoverscroll
> onpagehide
> onpageshow
> onpaste
>@@ -287,6 +288,7 @@ onratechange
> onreset
> onresize
> onscroll
>+onscrollend
> onsearch
> onseeked
> onseeking
>diff --git a/Source/WebCore/html/HTMLElement.cpp b/Source/WebCore/html/HTMLElement.cpp
>index 32ed4ad31bd30ecf4ccc48fb14244a32324e04b8..ae59ac12f8f423ef2a471222cde7d2ec4d0e2323 100644
>--- a/Source/WebCore/html/HTMLElement.cpp
>+++ b/Source/WebCore/html/HTMLElement.cpp
>@@ -284,6 +284,7 @@ HTMLElement::EventHandlerNameMap HTMLElement::createEventHandlerNameMap()
>         &onmouseoverAttr.get(),
>         &onmouseupAttr.get(),
>         &onmousewheelAttr.get(),
>+        &onoverscrollAttr.get(),
>         &onpasteAttr.get(),
>         &onpauseAttr.get(),
>         &onplayAttr.get(),
>@@ -301,6 +302,7 @@ HTMLElement::EventHandlerNameMap HTMLElement::createEventHandlerNameMap()
>         &onresetAttr.get(),
>         &onresizeAttr.get(),
>         &onscrollAttr.get(),
>+        &onscrollendAttr.get(),
>         &onsearchAttr.get(),
>         &onseekedAttr.get(),
>         &onseekingAttr.get(),
>diff --git a/Source/WebCore/page/Settings.yaml b/Source/WebCore/page/Settings.yaml
>index 54380910eaf4700b425b083de5c36da40a4ee615..52207adb60fd38de59fa1771a313ef46ec5795b5 100644
>--- a/Source/WebCore/page/Settings.yaml
>+++ b/Source/WebCore/page/Settings.yaml
>@@ -915,6 +915,10 @@ isLoggedInAPIEnabled:
> enterKeyHintEnabled:
>   initial: false
> 
>+overscrollCustomizationEnabled:
>+  initial: false
>+  conditional: OVERSCROLL_CUSTOMIZATION
>+
> legacyGetUserMediaEnabled:
>   initial: false
>   conditional: MEDIA_STREAM
>diff --git a/Source/WebKit/Configurations/FeatureDefines.xcconfig b/Source/WebKit/Configurations/FeatureDefines.xcconfig
>index af9c12646c7fab536d8ba3285352119497b4d332..b4855de0c5233d139956a65ce0113150cd9b0d56 100644
>--- a/Source/WebKit/Configurations/FeatureDefines.xcconfig
>+++ b/Source/WebKit/Configurations/FeatureDefines.xcconfig
>@@ -301,6 +301,8 @@ ENABLE_OFFSCREEN_CANVAS = ;
> ENABLE_OVERFLOW_SCROLLING_TOUCH = $(ENABLE_OVERFLOW_SCROLLING_TOUCH_$(WK_COCOA_TOUCH));
> ENABLE_OVERFLOW_SCROLLING_TOUCH_cocoatouch = ENABLE_OVERFLOW_SCROLLING_TOUCH;
> 
>+ENABLE_OVERSCROLL_CUSTOMIZATION = ENABLE_OVERSCROLL_CUSTOMIZATION;
>+
> ENABLE_PAYMENT_REQUEST = ENABLE_PAYMENT_REQUEST;
> 
> ENABLE_PICTURE_IN_PICTURE_API = $(ENABLE_PICTURE_IN_PICTURE_API_$(WK_PLATFORM_NAME));
>@@ -430,4 +432,4 @@ ENABLE_WIRELESS_PLAYBACK_TARGET = ENABLE_WIRELESS_PLAYBACK_TARGET;
> 
> ENABLE_XSLT = ENABLE_XSLT;
> 
>-FEATURE_DEFINES = $(ENABLE_3D_TRANSFORMS) $(ENABLE_ACCELERATED_2D_CANVAS) $(ENABLE_ACCESSIBILITY_ISOLATED_TREE) $(ENABLE_APPLE_PAY) $(ENABLE_APPLE_PAY_SESSION_V3) $(ENABLE_APPLE_PAY_SESSION_V4) $(ENABLE_APPLE_PAY_SESSION_V9) $(ENABLE_APPLICATION_MANIFEST) $(ENABLE_ATTACHMENT_ELEMENT) $(ENABLE_AVF_CAPTIONS) $(ENABLE_CACHE_PARTITIONING) $(ENABLE_CHANNEL_MESSAGING) $(ENABLE_CONTENT_FILTERING) $(ENABLE_CSS3_TEXT) $(ENABLE_CSS_BOX_DECORATION_BREAK) $(ENABLE_CSS_COMPOSITING) $(ENABLE_CSS_CONIC_GRADIENTS) $(ENABLE_CSS_IMAGE_RESOLUTION) $(ENABLE_CSS_PAINTING_API) $(ENABLE_CSS_SCROLL_SNAP) $(ENABLE_CSS_SELECTORS_LEVEL4) $(ENABLE_CSS_TRAILING_WORD) $(ENABLE_CSS_TYPED_OM) $(ENABLE_CURSOR_VISIBILITY) $(ENABLE_CUSTOM_SCHEME_HANDLER) $(ENABLE_C_LOOP) $(ENABLE_DARK_MODE_CSS) $(ENABLE_DATACUE_VALUE) $(ENABLE_DATALIST_ELEMENT) $(ENABLE_DATA_INTERACTION) $(ENABLE_DEVICE_ORIENTATION) $(ENABLE_DRAG_SUPPORT) $(ENABLE_ENCRYPTED_MEDIA) $(ENABLE_EXPERIMENTAL_FEATURES) $(ENABLE_FILTERS_LEVEL_2) $(ENABLE_FULLSCREEN_API) $(ENABLE_PICTURE_IN_PICTURE_API) $(ENABLE_GAMEPAD) $(ENABLE_GEOLOCATION) $(ENABLE_GPU_PROCESS) $(ENABLE_INDEXED_DATABASE) $(ENABLE_INDEXED_DATABASE_IN_WORKERS) $(ENABLE_INPUT_TYPE_COLOR) $(ENABLE_INPUT_TYPE_DATE) $(ENABLE_INPUT_TYPE_DATETIMELOCAL) $(ENABLE_INPUT_TYPE_DATETIME_INCOMPLETE) $(ENABLE_INPUT_TYPE_MONTH) $(ENABLE_INPUT_TYPE_TIME) $(ENABLE_INPUT_TYPE_WEEK) $(ENABLE_INSPECTOR_ALTERNATE_DISPATCHERS) $(ENABLE_INSPECTOR_TELEMETRY) $(ENABLE_INTERSECTION_OBSERVER) $(ENABLE_IOS_GESTURE_EVENTS) $(ENABLE_IOS_TOUCH_EVENTS) $(ENABLE_LAYOUT_FORMATTING_CONTEXT) $(ENABLE_LEGACY_CSS_VENDOR_PREFIXES) $(ENABLE_LEGACY_CUSTOM_PROTOCOL_MANAGER) $(ENABLE_LEGACY_ENCRYPTED_MEDIA) $(ENABLE_LETTERPRESS) $(ENABLE_MAC_GESTURE_EVENTS) $(ENABLE_MAC_VIDEO_TOOLBOX) $(ENABLE_MATHML) $(ENABLE_MEDIA_CAPTURE) $(ENABLE_MEDIA_CONTROLS_SCRIPT) $(ENABLE_MEDIA_SESSION) $(ENABLE_MEDIA_SOURCE) $(ENABLE_MEDIA_STATISTICS) $(ENABLE_MEDIA_STREAM) $(ENABLE_MEMORY_SAMPLER) $(ENABLE_METER_ELEMENT) $(ENABLE_MHTML) $(ENABLE_MOUSE_CURSOR_SCALE) $(ENABLE_NAVIGATOR_STANDALONE) $(ENABLE_NETWORK_CACHE_SPECULATIVE_REVALIDATION) $(ENABLE_NETWORK_CACHE_STALE_WHILE_REVALIDATE) $(ENABLE_NOTIFICATIONS) $(ENABLE_OFFSCREEN_CANVAS) $(ENABLE_OVERFLOW_SCROLLING_TOUCH) $(ENABLE_PAYMENT_REQUEST) $(ENABLE_PDFKIT_PLUGIN) $(ENABLE_POINTER_EVENTS) $(ENABLE_POINTER_LOCK) $(ENABLE_PUBLIC_SUFFIX_LIST) $(ENABLE_QUOTA) $(ENABLE_REMOTE_INSPECTOR) $(ENABLE_RESIZE_OBSERVER) $(ENABLE_RESOLUTION_MEDIA_QUERY) $(ENABLE_RESOURCE_LOAD_STATISTICS) $(ENABLE_RESOURCE_USAGE) $(ENABLE_RUBBER_BANDING) $(ENABLE_SANDBOX_EXTENSIONS) $(ENABLE_SERVER_PRECONNECT) $(ENABLE_SERVICE_CONTROLS) $(ENABLE_SERVICE_WORKER) $(ENABLE_SHAREABLE_RESOURCE) $(ENABLE_SPEECH_SYNTHESIS) $(ENABLE_STREAMS_API) $(ENABLE_SVG_FONTS) $(ENABLE_TELEPHONE_NUMBER_DETECTION) $(ENABLE_TEXT_AUTOSIZING) $(ENABLE_TOUCH_EVENTS) $(ENABLE_USERSELECT_ALL) $(ENABLE_USER_MESSAGE_HANDLERS) $(ENABLE_VARIATION_FONTS) $(ENABLE_VIDEO) $(ENABLE_VIDEO_PRESENTATION_MODE) $(ENABLE_VIDEO_TRACK) $(ENABLE_VIDEO_USES_ELEMENT_FULLSCREEN) $(ENABLE_WEBDRIVER_MOUSE_INTERACTIONS) $(ENABLE_WEBDRIVER_KEYBOARD_INTERACTIONS) $(ENABLE_WEBDRIVER_TOUCH_INTERACTIONS) $(ENABLE_WEBGL) $(ENABLE_WEBGL2) $(ENABLE_WEBGPU) $(ENABLE_WEB_API_STATISTICS) $(ENABLE_WEB_AUDIO) $(ENABLE_WEB_AUTHN) $(ENABLE_WEB_CRYPTO) $(ENABLE_WEB_RTC) $(ENABLE_WIRELESS_PLAYBACK_TARGET) $(ENABLE_XSLT);
>+FEATURE_DEFINES = $(ENABLE_3D_TRANSFORMS) $(ENABLE_ACCELERATED_2D_CANVAS) $(ENABLE_ACCESSIBILITY_ISOLATED_TREE) $(ENABLE_APPLE_PAY) $(ENABLE_APPLE_PAY_SESSION_V3) $(ENABLE_APPLE_PAY_SESSION_V4) $(ENABLE_APPLE_PAY_SESSION_V9) $(ENABLE_APPLICATION_MANIFEST) $(ENABLE_ATTACHMENT_ELEMENT) $(ENABLE_AVF_CAPTIONS) $(ENABLE_CACHE_PARTITIONING) $(ENABLE_CHANNEL_MESSAGING) $(ENABLE_CONTENT_FILTERING) $(ENABLE_CSS3_TEXT) $(ENABLE_CSS_BOX_DECORATION_BREAK) $(ENABLE_CSS_COMPOSITING) $(ENABLE_CSS_CONIC_GRADIENTS) $(ENABLE_CSS_IMAGE_RESOLUTION) $(ENABLE_CSS_PAINTING_API) $(ENABLE_CSS_SCROLL_SNAP) $(ENABLE_CSS_SELECTORS_LEVEL4) $(ENABLE_CSS_TRAILING_WORD) $(ENABLE_CSS_TYPED_OM) $(ENABLE_CURSOR_VISIBILITY) $(ENABLE_CUSTOM_SCHEME_HANDLER) $(ENABLE_C_LOOP) $(ENABLE_DARK_MODE_CSS) $(ENABLE_DATACUE_VALUE) $(ENABLE_DATALIST_ELEMENT) $(ENABLE_DATA_INTERACTION) $(ENABLE_DEVICE_ORIENTATION) $(ENABLE_DRAG_SUPPORT) $(ENABLE_ENCRYPTED_MEDIA) $(ENABLE_EXPERIMENTAL_FEATURES) $(ENABLE_FILTERS_LEVEL_2) $(ENABLE_FULLSCREEN_API) $(ENABLE_PICTURE_IN_PICTURE_API) $(ENABLE_GAMEPAD) $(ENABLE_GEOLOCATION) $(ENABLE_GPU_PROCESS) $(ENABLE_INDEXED_DATABASE) $(ENABLE_INDEXED_DATABASE_IN_WORKERS) $(ENABLE_INPUT_TYPE_COLOR) $(ENABLE_INPUT_TYPE_DATE) $(ENABLE_INPUT_TYPE_DATETIMELOCAL) $(ENABLE_INPUT_TYPE_DATETIME_INCOMPLETE) $(ENABLE_INPUT_TYPE_MONTH) $(ENABLE_INPUT_TYPE_TIME) $(ENABLE_INPUT_TYPE_WEEK) $(ENABLE_INSPECTOR_ALTERNATE_DISPATCHERS) $(ENABLE_INSPECTOR_TELEMETRY) $(ENABLE_INTERSECTION_OBSERVER) $(ENABLE_IOS_GESTURE_EVENTS) $(ENABLE_IOS_TOUCH_EVENTS) $(ENABLE_LAYOUT_FORMATTING_CONTEXT) $(ENABLE_LEGACY_CSS_VENDOR_PREFIXES) $(ENABLE_LEGACY_CUSTOM_PROTOCOL_MANAGER) $(ENABLE_LEGACY_ENCRYPTED_MEDIA) $(ENABLE_LETTERPRESS) $(ENABLE_MAC_GESTURE_EVENTS) $(ENABLE_MAC_VIDEO_TOOLBOX) $(ENABLE_MATHML) $(ENABLE_MEDIA_CAPTURE) $(ENABLE_MEDIA_CONTROLS_SCRIPT) $(ENABLE_MEDIA_SESSION) $(ENABLE_MEDIA_SOURCE) $(ENABLE_MEDIA_STATISTICS) $(ENABLE_MEDIA_STREAM) $(ENABLE_MEMORY_SAMPLER) $(ENABLE_METER_ELEMENT) $(ENABLE_MHTML) $(ENABLE_MOUSE_CURSOR_SCALE) $(ENABLE_NAVIGATOR_STANDALONE) $(ENABLE_NETWORK_CACHE_SPECULATIVE_REVALIDATION) $(ENABLE_NETWORK_CACHE_STALE_WHILE_REVALIDATE) $(ENABLE_NOTIFICATIONS) $(ENABLE_OFFSCREEN_CANVAS) $(ENABLE_OVERFLOW_SCROLLING_TOUCH) $(ENABLE_OVERSCROLL_CUSTOMIZATION) $(ENABLE_PAYMENT_REQUEST) $(ENABLE_PDFKIT_PLUGIN) $(ENABLE_POINTER_EVENTS) $(ENABLE_POINTER_LOCK) $(ENABLE_PUBLIC_SUFFIX_LIST) $(ENABLE_QUOTA) $(ENABLE_REMOTE_INSPECTOR) $(ENABLE_RESIZE_OBSERVER) $(ENABLE_RESOLUTION_MEDIA_QUERY) $(ENABLE_RESOURCE_LOAD_STATISTICS) $(ENABLE_RESOURCE_USAGE) $(ENABLE_RUBBER_BANDING) $(ENABLE_SANDBOX_EXTENSIONS) $(ENABLE_SERVER_PRECONNECT) $(ENABLE_SERVICE_CONTROLS) $(ENABLE_SERVICE_WORKER) $(ENABLE_SHAREABLE_RESOURCE) $(ENABLE_SPEECH_SYNTHESIS) $(ENABLE_STREAMS_API) $(ENABLE_SVG_FONTS) $(ENABLE_TELEPHONE_NUMBER_DETECTION) $(ENABLE_TEXT_AUTOSIZING) $(ENABLE_TOUCH_EVENTS) $(ENABLE_USERSELECT_ALL) $(ENABLE_USER_MESSAGE_HANDLERS) $(ENABLE_VARIATION_FONTS) $(ENABLE_VIDEO) $(ENABLE_VIDEO_PRESENTATION_MODE) $(ENABLE_VIDEO_TRACK) $(ENABLE_VIDEO_USES_ELEMENT_FULLSCREEN) $(ENABLE_WEBDRIVER_MOUSE_INTERACTIONS) $(ENABLE_WEBDRIVER_KEYBOARD_INTERACTIONS) $(ENABLE_WEBDRIVER_TOUCH_INTERACTIONS) $(ENABLE_WEBGL) $(ENABLE_WEBGL2) $(ENABLE_WEBGPU) $(ENABLE_WEB_API_STATISTICS) $(ENABLE_WEB_AUDIO) $(ENABLE_WEB_AUTHN) $(ENABLE_WEB_CRYPTO) $(ENABLE_WEB_RTC) $(ENABLE_WIRELESS_PLAYBACK_TARGET) $(ENABLE_XSLT);
>diff --git a/Source/WebKit/Shared/WebPreferences.yaml b/Source/WebKit/Shared/WebPreferences.yaml
>index 9a1561aa5fd6bd69af9952cfb9192871f760485b..bec8551f244fa9f2411ab07e66f1e31dfda4c7ad 100644
>--- a/Source/WebKit/Shared/WebPreferences.yaml
>+++ b/Source/WebKit/Shared/WebPreferences.yaml
>@@ -1561,6 +1561,14 @@ AspectRatioOfImgFromWidthAndHeightEnabled:
>   humanReadableDescription: "Map HTML attributes width/height to the default aspect ratio of <img>"
>   category: experimental
> 
>+OverscrollCustomizationEnabled:
>+  type: bool
>+  defaultValue: false
>+  humanReadableName: "Overscroll customization"
>+  humanReadableDescription: "Enable the onscrollend and scrollend events"
>+  category: experimental
>+  condition: ENABLE(OVERSCROLL_CUSTOMIZATION)
>+
> # For internal features:
> # The type should be boolean.
> # You must provide a humanReadableName and humanReadableDescription for all debug features. They
>diff --git a/Source/WebKitLegacy/mac/Configurations/FeatureDefines.xcconfig b/Source/WebKitLegacy/mac/Configurations/FeatureDefines.xcconfig
>index af9c12646c7fab536d8ba3285352119497b4d332..b4855de0c5233d139956a65ce0113150cd9b0d56 100644
>--- a/Source/WebKitLegacy/mac/Configurations/FeatureDefines.xcconfig
>+++ b/Source/WebKitLegacy/mac/Configurations/FeatureDefines.xcconfig
>@@ -301,6 +301,8 @@ ENABLE_OFFSCREEN_CANVAS = ;
> ENABLE_OVERFLOW_SCROLLING_TOUCH = $(ENABLE_OVERFLOW_SCROLLING_TOUCH_$(WK_COCOA_TOUCH));
> ENABLE_OVERFLOW_SCROLLING_TOUCH_cocoatouch = ENABLE_OVERFLOW_SCROLLING_TOUCH;
> 
>+ENABLE_OVERSCROLL_CUSTOMIZATION = ENABLE_OVERSCROLL_CUSTOMIZATION;
>+
> ENABLE_PAYMENT_REQUEST = ENABLE_PAYMENT_REQUEST;
> 
> ENABLE_PICTURE_IN_PICTURE_API = $(ENABLE_PICTURE_IN_PICTURE_API_$(WK_PLATFORM_NAME));
>@@ -430,4 +432,4 @@ ENABLE_WIRELESS_PLAYBACK_TARGET = ENABLE_WIRELESS_PLAYBACK_TARGET;
> 
> ENABLE_XSLT = ENABLE_XSLT;
> 
>-FEATURE_DEFINES = $(ENABLE_3D_TRANSFORMS) $(ENABLE_ACCELERATED_2D_CANVAS) $(ENABLE_ACCESSIBILITY_ISOLATED_TREE) $(ENABLE_APPLE_PAY) $(ENABLE_APPLE_PAY_SESSION_V3) $(ENABLE_APPLE_PAY_SESSION_V4) $(ENABLE_APPLE_PAY_SESSION_V9) $(ENABLE_APPLICATION_MANIFEST) $(ENABLE_ATTACHMENT_ELEMENT) $(ENABLE_AVF_CAPTIONS) $(ENABLE_CACHE_PARTITIONING) $(ENABLE_CHANNEL_MESSAGING) $(ENABLE_CONTENT_FILTERING) $(ENABLE_CSS3_TEXT) $(ENABLE_CSS_BOX_DECORATION_BREAK) $(ENABLE_CSS_COMPOSITING) $(ENABLE_CSS_CONIC_GRADIENTS) $(ENABLE_CSS_IMAGE_RESOLUTION) $(ENABLE_CSS_PAINTING_API) $(ENABLE_CSS_SCROLL_SNAP) $(ENABLE_CSS_SELECTORS_LEVEL4) $(ENABLE_CSS_TRAILING_WORD) $(ENABLE_CSS_TYPED_OM) $(ENABLE_CURSOR_VISIBILITY) $(ENABLE_CUSTOM_SCHEME_HANDLER) $(ENABLE_C_LOOP) $(ENABLE_DARK_MODE_CSS) $(ENABLE_DATACUE_VALUE) $(ENABLE_DATALIST_ELEMENT) $(ENABLE_DATA_INTERACTION) $(ENABLE_DEVICE_ORIENTATION) $(ENABLE_DRAG_SUPPORT) $(ENABLE_ENCRYPTED_MEDIA) $(ENABLE_EXPERIMENTAL_FEATURES) $(ENABLE_FILTERS_LEVEL_2) $(ENABLE_FULLSCREEN_API) $(ENABLE_PICTURE_IN_PICTURE_API) $(ENABLE_GAMEPAD) $(ENABLE_GEOLOCATION) $(ENABLE_GPU_PROCESS) $(ENABLE_INDEXED_DATABASE) $(ENABLE_INDEXED_DATABASE_IN_WORKERS) $(ENABLE_INPUT_TYPE_COLOR) $(ENABLE_INPUT_TYPE_DATE) $(ENABLE_INPUT_TYPE_DATETIMELOCAL) $(ENABLE_INPUT_TYPE_DATETIME_INCOMPLETE) $(ENABLE_INPUT_TYPE_MONTH) $(ENABLE_INPUT_TYPE_TIME) $(ENABLE_INPUT_TYPE_WEEK) $(ENABLE_INSPECTOR_ALTERNATE_DISPATCHERS) $(ENABLE_INSPECTOR_TELEMETRY) $(ENABLE_INTERSECTION_OBSERVER) $(ENABLE_IOS_GESTURE_EVENTS) $(ENABLE_IOS_TOUCH_EVENTS) $(ENABLE_LAYOUT_FORMATTING_CONTEXT) $(ENABLE_LEGACY_CSS_VENDOR_PREFIXES) $(ENABLE_LEGACY_CUSTOM_PROTOCOL_MANAGER) $(ENABLE_LEGACY_ENCRYPTED_MEDIA) $(ENABLE_LETTERPRESS) $(ENABLE_MAC_GESTURE_EVENTS) $(ENABLE_MAC_VIDEO_TOOLBOX) $(ENABLE_MATHML) $(ENABLE_MEDIA_CAPTURE) $(ENABLE_MEDIA_CONTROLS_SCRIPT) $(ENABLE_MEDIA_SESSION) $(ENABLE_MEDIA_SOURCE) $(ENABLE_MEDIA_STATISTICS) $(ENABLE_MEDIA_STREAM) $(ENABLE_MEMORY_SAMPLER) $(ENABLE_METER_ELEMENT) $(ENABLE_MHTML) $(ENABLE_MOUSE_CURSOR_SCALE) $(ENABLE_NAVIGATOR_STANDALONE) $(ENABLE_NETWORK_CACHE_SPECULATIVE_REVALIDATION) $(ENABLE_NETWORK_CACHE_STALE_WHILE_REVALIDATE) $(ENABLE_NOTIFICATIONS) $(ENABLE_OFFSCREEN_CANVAS) $(ENABLE_OVERFLOW_SCROLLING_TOUCH) $(ENABLE_PAYMENT_REQUEST) $(ENABLE_PDFKIT_PLUGIN) $(ENABLE_POINTER_EVENTS) $(ENABLE_POINTER_LOCK) $(ENABLE_PUBLIC_SUFFIX_LIST) $(ENABLE_QUOTA) $(ENABLE_REMOTE_INSPECTOR) $(ENABLE_RESIZE_OBSERVER) $(ENABLE_RESOLUTION_MEDIA_QUERY) $(ENABLE_RESOURCE_LOAD_STATISTICS) $(ENABLE_RESOURCE_USAGE) $(ENABLE_RUBBER_BANDING) $(ENABLE_SANDBOX_EXTENSIONS) $(ENABLE_SERVER_PRECONNECT) $(ENABLE_SERVICE_CONTROLS) $(ENABLE_SERVICE_WORKER) $(ENABLE_SHAREABLE_RESOURCE) $(ENABLE_SPEECH_SYNTHESIS) $(ENABLE_STREAMS_API) $(ENABLE_SVG_FONTS) $(ENABLE_TELEPHONE_NUMBER_DETECTION) $(ENABLE_TEXT_AUTOSIZING) $(ENABLE_TOUCH_EVENTS) $(ENABLE_USERSELECT_ALL) $(ENABLE_USER_MESSAGE_HANDLERS) $(ENABLE_VARIATION_FONTS) $(ENABLE_VIDEO) $(ENABLE_VIDEO_PRESENTATION_MODE) $(ENABLE_VIDEO_TRACK) $(ENABLE_VIDEO_USES_ELEMENT_FULLSCREEN) $(ENABLE_WEBDRIVER_MOUSE_INTERACTIONS) $(ENABLE_WEBDRIVER_KEYBOARD_INTERACTIONS) $(ENABLE_WEBDRIVER_TOUCH_INTERACTIONS) $(ENABLE_WEBGL) $(ENABLE_WEBGL2) $(ENABLE_WEBGPU) $(ENABLE_WEB_API_STATISTICS) $(ENABLE_WEB_AUDIO) $(ENABLE_WEB_AUTHN) $(ENABLE_WEB_CRYPTO) $(ENABLE_WEB_RTC) $(ENABLE_WIRELESS_PLAYBACK_TARGET) $(ENABLE_XSLT);
>+FEATURE_DEFINES = $(ENABLE_3D_TRANSFORMS) $(ENABLE_ACCELERATED_2D_CANVAS) $(ENABLE_ACCESSIBILITY_ISOLATED_TREE) $(ENABLE_APPLE_PAY) $(ENABLE_APPLE_PAY_SESSION_V3) $(ENABLE_APPLE_PAY_SESSION_V4) $(ENABLE_APPLE_PAY_SESSION_V9) $(ENABLE_APPLICATION_MANIFEST) $(ENABLE_ATTACHMENT_ELEMENT) $(ENABLE_AVF_CAPTIONS) $(ENABLE_CACHE_PARTITIONING) $(ENABLE_CHANNEL_MESSAGING) $(ENABLE_CONTENT_FILTERING) $(ENABLE_CSS3_TEXT) $(ENABLE_CSS_BOX_DECORATION_BREAK) $(ENABLE_CSS_COMPOSITING) $(ENABLE_CSS_CONIC_GRADIENTS) $(ENABLE_CSS_IMAGE_RESOLUTION) $(ENABLE_CSS_PAINTING_API) $(ENABLE_CSS_SCROLL_SNAP) $(ENABLE_CSS_SELECTORS_LEVEL4) $(ENABLE_CSS_TRAILING_WORD) $(ENABLE_CSS_TYPED_OM) $(ENABLE_CURSOR_VISIBILITY) $(ENABLE_CUSTOM_SCHEME_HANDLER) $(ENABLE_C_LOOP) $(ENABLE_DARK_MODE_CSS) $(ENABLE_DATACUE_VALUE) $(ENABLE_DATALIST_ELEMENT) $(ENABLE_DATA_INTERACTION) $(ENABLE_DEVICE_ORIENTATION) $(ENABLE_DRAG_SUPPORT) $(ENABLE_ENCRYPTED_MEDIA) $(ENABLE_EXPERIMENTAL_FEATURES) $(ENABLE_FILTERS_LEVEL_2) $(ENABLE_FULLSCREEN_API) $(ENABLE_PICTURE_IN_PICTURE_API) $(ENABLE_GAMEPAD) $(ENABLE_GEOLOCATION) $(ENABLE_GPU_PROCESS) $(ENABLE_INDEXED_DATABASE) $(ENABLE_INDEXED_DATABASE_IN_WORKERS) $(ENABLE_INPUT_TYPE_COLOR) $(ENABLE_INPUT_TYPE_DATE) $(ENABLE_INPUT_TYPE_DATETIMELOCAL) $(ENABLE_INPUT_TYPE_DATETIME_INCOMPLETE) $(ENABLE_INPUT_TYPE_MONTH) $(ENABLE_INPUT_TYPE_TIME) $(ENABLE_INPUT_TYPE_WEEK) $(ENABLE_INSPECTOR_ALTERNATE_DISPATCHERS) $(ENABLE_INSPECTOR_TELEMETRY) $(ENABLE_INTERSECTION_OBSERVER) $(ENABLE_IOS_GESTURE_EVENTS) $(ENABLE_IOS_TOUCH_EVENTS) $(ENABLE_LAYOUT_FORMATTING_CONTEXT) $(ENABLE_LEGACY_CSS_VENDOR_PREFIXES) $(ENABLE_LEGACY_CUSTOM_PROTOCOL_MANAGER) $(ENABLE_LEGACY_ENCRYPTED_MEDIA) $(ENABLE_LETTERPRESS) $(ENABLE_MAC_GESTURE_EVENTS) $(ENABLE_MAC_VIDEO_TOOLBOX) $(ENABLE_MATHML) $(ENABLE_MEDIA_CAPTURE) $(ENABLE_MEDIA_CONTROLS_SCRIPT) $(ENABLE_MEDIA_SESSION) $(ENABLE_MEDIA_SOURCE) $(ENABLE_MEDIA_STATISTICS) $(ENABLE_MEDIA_STREAM) $(ENABLE_MEMORY_SAMPLER) $(ENABLE_METER_ELEMENT) $(ENABLE_MHTML) $(ENABLE_MOUSE_CURSOR_SCALE) $(ENABLE_NAVIGATOR_STANDALONE) $(ENABLE_NETWORK_CACHE_SPECULATIVE_REVALIDATION) $(ENABLE_NETWORK_CACHE_STALE_WHILE_REVALIDATE) $(ENABLE_NOTIFICATIONS) $(ENABLE_OFFSCREEN_CANVAS) $(ENABLE_OVERFLOW_SCROLLING_TOUCH) $(ENABLE_OVERSCROLL_CUSTOMIZATION) $(ENABLE_PAYMENT_REQUEST) $(ENABLE_PDFKIT_PLUGIN) $(ENABLE_POINTER_EVENTS) $(ENABLE_POINTER_LOCK) $(ENABLE_PUBLIC_SUFFIX_LIST) $(ENABLE_QUOTA) $(ENABLE_REMOTE_INSPECTOR) $(ENABLE_RESIZE_OBSERVER) $(ENABLE_RESOLUTION_MEDIA_QUERY) $(ENABLE_RESOURCE_LOAD_STATISTICS) $(ENABLE_RESOURCE_USAGE) $(ENABLE_RUBBER_BANDING) $(ENABLE_SANDBOX_EXTENSIONS) $(ENABLE_SERVER_PRECONNECT) $(ENABLE_SERVICE_CONTROLS) $(ENABLE_SERVICE_WORKER) $(ENABLE_SHAREABLE_RESOURCE) $(ENABLE_SPEECH_SYNTHESIS) $(ENABLE_STREAMS_API) $(ENABLE_SVG_FONTS) $(ENABLE_TELEPHONE_NUMBER_DETECTION) $(ENABLE_TEXT_AUTOSIZING) $(ENABLE_TOUCH_EVENTS) $(ENABLE_USERSELECT_ALL) $(ENABLE_USER_MESSAGE_HANDLERS) $(ENABLE_VARIATION_FONTS) $(ENABLE_VIDEO) $(ENABLE_VIDEO_PRESENTATION_MODE) $(ENABLE_VIDEO_TRACK) $(ENABLE_VIDEO_USES_ELEMENT_FULLSCREEN) $(ENABLE_WEBDRIVER_MOUSE_INTERACTIONS) $(ENABLE_WEBDRIVER_KEYBOARD_INTERACTIONS) $(ENABLE_WEBDRIVER_TOUCH_INTERACTIONS) $(ENABLE_WEBGL) $(ENABLE_WEBGL2) $(ENABLE_WEBGPU) $(ENABLE_WEB_API_STATISTICS) $(ENABLE_WEB_AUDIO) $(ENABLE_WEB_AUTHN) $(ENABLE_WEB_CRYPTO) $(ENABLE_WEB_RTC) $(ENABLE_WIRELESS_PLAYBACK_TARGET) $(ENABLE_XSLT);
>diff --git a/Source/WebKitLegacy/mac/WebView/WebPreferenceKeysPrivate.h b/Source/WebKitLegacy/mac/WebView/WebPreferenceKeysPrivate.h
>index 966b6c4d395a29382c73620e632fced1f0c3cbe9..40b3fde9c48d788f1a6791b284c9e6c9e50bdc8c 100644
>--- a/Source/WebKitLegacy/mac/WebView/WebPreferenceKeysPrivate.h
>+++ b/Source/WebKitLegacy/mac/WebView/WebPreferenceKeysPrivate.h
>@@ -210,6 +210,7 @@
> #define WebKitCSSShadowPartsEnabledPreferenceKey @"WebKitCSSShadowPartsEnabled"
> #define WebKitLayoutFormattingContextIntegrationEnabledPreferenceKey @"WebKitLayoutFormattingContextIntegrationEnabled"
> #define WebKitWebSQLEnabledPreferenceKey @"WebKitWebSQLEnabled"
>+#define WebKitOverscrollCustomizationEnabledPreferenceKey @"WebKitOverscrollCustomizationEnabled"
> 
> #if !TARGET_OS_IPHONE
> // These are private both because callers should be using the cover methods and because the
>diff --git a/Source/WebKitLegacy/mac/WebView/WebPreferences.mm b/Source/WebKitLegacy/mac/WebView/WebPreferences.mm
>index 33f0316b844c65baa9030bac7806283b78f0feb1..3c35af6f22805d83f328abab50985cca7f057727 100644
>--- a/Source/WebKitLegacy/mac/WebView/WebPreferences.mm
>+++ b/Source/WebKitLegacy/mac/WebView/WebPreferences.mm
>@@ -714,6 +714,9 @@ public:
>         @NO, WebKitAspectRatioOfImgFromWidthAndHeightEnabledPreferenceKey,
>         @NO, WebKitWebSQLEnabledPreferenceKey,
>         @YES, WebKitInternalDebugNeedsInAppBrowserPrivacyQuirksPreferenceKey,
>+#if ENABLE(OVERSCROLL_CUSTOMIZATION)
>+        @NO, WebKitOverscrollCustomizationEnabledPreferenceKey,
>+#endif
>         nil];
> 
> #if !PLATFORM(IOS_FAMILY)
>@@ -3680,6 +3683,16 @@ static NSString *classIBCreatorID = nil;
>     [self _setBoolValue:webSQLEnabled forKey:WebKitWebSQLEnabledPreferenceKey];
> }
> 
>+- (BOOL)overscrollCustomizationEnabled
>+{
>+    return [self _boolValueForKey:WebKitOverscrollCustomizationEnabledPreferenceKey];
>+}
>+
>+- (void)setOverscrollCustomizationEnabled:(BOOL)flag
>+{
>+    [self _setBoolValue:flag forKey:WebKitOverscrollCustomizationEnabledPreferenceKey];
>+}
>+
> @end
> 
> @implementation WebPreferences (WebInternal)
>diff --git a/Source/WebKitLegacy/mac/WebView/WebPreferencesPrivate.h b/Source/WebKitLegacy/mac/WebView/WebPreferencesPrivate.h
>index a84549d4abd1c5d26ddf9bbf3b4de79dd407c18d..57c64b36f1c78a2c28122dc49d5bfac81daabeaf 100644
>--- a/Source/WebKitLegacy/mac/WebView/WebPreferencesPrivate.h
>+++ b/Source/WebKitLegacy/mac/WebView/WebPreferencesPrivate.h
>@@ -688,6 +688,7 @@ extern NSString *WebPreferencesCacheModelChangedInternalNotification WEBKIT_DEPR
> @property (nonatomic) BOOL asyncClipboardAPIEnabled;
> @property (nonatomic) BOOL linkPreloadResponsiveImagesEnabled;
> @property (nonatomic) BOOL aspectRatioOfImgFromWidthAndHeightEnabled;
>+@property (nonatomic) BOOL overscrollCustomizationEnabled;
> 
> #if TARGET_OS_IPHONE
> @property (nonatomic) BOOL quickLookDocumentSavingEnabled;
>diff --git a/Source/WebKitLegacy/mac/WebView/WebView.mm b/Source/WebKitLegacy/mac/WebView/WebView.mm
>index cb3379a7bcddb0f83e0c5db7621aebbc4bccac88..d9c4e972b32f7aaa75a404852ea4b3ef485e7d86 100644
>--- a/Source/WebKitLegacy/mac/WebView/WebView.mm
>+++ b/Source/WebKitLegacy/mac/WebView/WebView.mm
>@@ -3006,6 +3006,9 @@ static bool needsSelfRetainWhileLoadingQuirk()
>     settings.setCSSOMViewScrollingAPIEnabled([preferences CSSOMViewScrollingAPIEnabled]);
>     settings.setCSSOMViewSmoothScrollingEnabled([preferences CSSOMViewSmoothScrollingEnabled]);
>     settings.setMediaContentTypesRequiringHardwareSupport([preferences mediaContentTypesRequiringHardwareSupport]);
>+#if ENABLE(OVERSCROLL_CUSTOMIZATION)
>+    settings.setOverscrollCustomizationEnabled([preferences overscrollCustomizationEnabled]);
>+#endif
> 
>     switch ([preferences storageBlockingPolicy]) {
>     case WebAllowAllStorage:
>diff --git a/Source/WebKitLegacy/win/Interfaces/IWebPreferencesPrivate.idl b/Source/WebKitLegacy/win/Interfaces/IWebPreferencesPrivate.idl
>index dffd94dd86c2ffd706708ac770776ceb030edb49..e8f06a3e750b548b00eea31ae0dba6fcee049fab 100644
>--- a/Source/WebKitLegacy/win/Interfaces/IWebPreferencesPrivate.idl
>+++ b/Source/WebKitLegacy/win/Interfaces/IWebPreferencesPrivate.idl
>@@ -265,4 +265,7 @@ interface IWebPreferencesPrivate8 : IWebPreferencesPrivate7
> {
>     HRESULT allowTopNavigationToDataURLs([out, retval] BOOL* enabled);
>     HRESULT setAllowTopNavigationToDataURLs([in] BOOL enabled);
>+    HRESULT overscrollCustomizationEnabled([out, retval] BOOL*);
>+    HRESULT setOverscrollCustomizationEnabled([in] BOOL enabled);
>+
> }
>diff --git a/Source/WebKitLegacy/win/WebPreferenceKeysPrivate.h b/Source/WebKitLegacy/win/WebPreferenceKeysPrivate.h
>index 17bcf9be18eba8234323d4bd2ca9251fb7b0ff22..d1c9e6701f8fe1dbe2602dbab9827878ffb11290 100644
>--- a/Source/WebKitLegacy/win/WebPreferenceKeysPrivate.h
>+++ b/Source/WebKitLegacy/win/WebPreferenceKeysPrivate.h
>@@ -214,6 +214,7 @@
> #define WebKitServerTimingEnabledPreferenceKey "WebKitServerTimingEnabled"
> 
> #define WebKitCSSOMViewScrollingAPIEnabledPreferenceKey "WebKitCSSOMViewScrollingAPIEnabled"
>+
> #define WebKitCSSOMViewSmoothScrollingEnabledPreferenceKey "WebKitCSSOMViewSmoothScrollingEnabled"
> 
> #define WebKitResizeObserverEnabledPreferenceKey "WebKitResizeObserverEnabled"
>@@ -227,3 +228,5 @@
> #define WebKitAspectRatioOfImgFromWidthAndHeightEnabledPreferenceKey "WebKitAspectRatioOfImgFromWidthAndHeightEnabled"
> 
> #define WebKitWebSQLEnabledPreferenceKey "WebKitWebSQLEnabled"
>+
>+#define WebKitOverscrollCustomizationEnabledPreferenceKey "WebKitOverscrollCustomizationEnabled"
>diff --git a/Source/WebKitLegacy/win/WebPreferences.cpp b/Source/WebKitLegacy/win/WebPreferences.cpp
>index dd29e9236ca8780f875b6160b91e4867ccbccdb8..8e2b8afe90381fe8e475d569fcce7317b731b615 100644
>--- a/Source/WebKitLegacy/win/WebPreferences.cpp
>+++ b/Source/WebKitLegacy/win/WebPreferences.cpp
>@@ -354,6 +354,8 @@ void WebPreferences::initializeDefaultSettings()
> 
>     CFDictionaryAddValue(defaults, CFSTR(WebKitWebSQLEnabledPreferenceKey), kCFBooleanFalse);
> 
>+    CFDictionaryAddValue(defaults, CFSTR(WebKitOverscrollCustomizationEnabledPreferenceKey), kCFBooleanFalse);
>+
>     defaultSettings = defaults;
> #endif
> }
>@@ -2470,6 +2472,20 @@ HRESULT WebPreferences::setWebSQLEnabled(BOOL enabled)
>     return S_OK;
> }
> 
>+HRESULT WebPreferences::overscrollCustomizationEnabled(_Out_ BOOL* enabled)
>+{
>+    if (!enabled)
>+        return E_POINTER;
>+    *enabled = boolValueForKey(WebKitOverscrollCustomizationEnabledPreferenceKey);
>+    return S_OK;
>+}
>+
>+HRESULT WebPreferences::setOverscrollCustomizationEnabled(BOOL enabled)
>+{
>+    setBoolValue(WebKitOverscrollCustomizationEnabledPreferenceKey, enabled);
>+    return S_OK;
>+}
>+
> HRESULT WebPreferences::allowTopNavigationToDataURLs(_Out_ BOOL* allowAccess)
> {
>     if (!allowAccess)
>diff --git a/Source/WebKitLegacy/win/WebPreferences.h b/Source/WebKitLegacy/win/WebPreferences.h
>index a31ba03a825470d81334cdf6438f517f4adf091f..32a7f358f8a6e9d27b412ee3d74100fd9a94693f 100644
>--- a/Source/WebKitLegacy/win/WebPreferences.h
>+++ b/Source/WebKitLegacy/win/WebPreferences.h
>@@ -307,6 +307,8 @@ public:
>     // IWebPreferencesPrivate8
>     virtual HRESULT STDMETHODCALLTYPE allowTopNavigationToDataURLs(_Out_ BOOL*);
>     virtual HRESULT STDMETHODCALLTYPE setAllowTopNavigationToDataURLs(BOOL);
>+    virtual HRESULT STDMETHODCALLTYPE overscrollCustomizationEnabled(_Out_ BOOL*);
>+    virtual HRESULT STDMETHODCALLTYPE setOverscrollCustomizationEnabled(BOOL);
> 
>     // WebPreferences
> 
>diff --git a/Source/WebKitLegacy/win/WebView.cpp b/Source/WebKitLegacy/win/WebView.cpp
>index 23c39974309a98214aa870e59b56b732554384a0..6685bbab38f49e23e7ae2f7a3b34f5fa39a5f142 100644
>--- a/Source/WebKitLegacy/win/WebView.cpp
>+++ b/Source/WebKitLegacy/win/WebView.cpp
>@@ -5669,6 +5669,11 @@ HRESULT WebView::notifyPreferencesChanged(IWebNotification* notification)
>         return hr;
>     settings.setAspectRatioOfImgFromWidthAndHeightEnabled(!!enabled);
> 
>+    hr = prefsPrivate->overscrollCustomizationEnabled(&enabled);
>+    if (FAILED(hr))
>+        return hr;
>+    settings.setOverscrollCustomizationEnabled(!!enabled);
>+
>     return S_OK;
> }
> 
>diff --git a/Source/cmake/WebKitFeatures.cmake b/Source/cmake/WebKitFeatures.cmake
>index a0bbe791ff4e09cfbe5b6ac443e2e7df158d528c..4ea27b5b5e4729a7767a53ce4e3daf626c1cbdd6 100644
>--- a/Source/cmake/WebKitFeatures.cmake
>+++ b/Source/cmake/WebKitFeatures.cmake
>@@ -179,6 +179,7 @@ macro(WEBKIT_OPTION_BEGIN)
>     WEBKIT_OPTION_DEFINE(ENABLE_OFFSCREEN_CANVAS "Toggle OffscreenCanvas support" PRIVATE OFF)
>     WEBKIT_OPTION_DEFINE(ENABLE_ORIENTATION_EVENTS "Toggle Orientation Events support" PRIVATE OFF)
>     WEBKIT_OPTION_DEFINE(ENABLE_OVERFLOW_SCROLLING_TOUCH "Toggle accelerated scrolling support" PRIVATE OFF)
>+    WEBKIT_OPTION_DEFINE(ENABLE_OVERSCROLL_CUSTOMIZATION "Toggle overscroll customization" PRIVATE OFF)
>     WEBKIT_OPTION_DEFINE(ENABLE_PAYMENT_REQUEST "Toggle Payment Request support" PRIVATE OFF)
>     WEBKIT_OPTION_DEFINE(ENABLE_PDFKIT_PLUGIN "Toggle PDFKit plugin support" PRIVATE OFF)
>     WEBKIT_OPTION_DEFINE(ENABLE_POINTER_LOCK "Toggle pointer lock support" PRIVATE OFF)
>diff --git a/Tools/ChangeLog b/Tools/ChangeLog
>index 934c3b2c11c3da640150e542a99cbfc3056fc061..3ddcdf232636fd184a918ceb88fb3fc9dfc4b435 100644
>--- a/Tools/ChangeLog
>+++ b/Tools/ChangeLog
>@@ -1,3 +1,21 @@
>+2020-03-09  Cathie Chen  <cathiechen@igalia.com>
>+
>+        Add support for overscroll customization parsing
>+        https://bugs.webkit.org/show_bug.cgi?id=208802
>+
>+        Reviewed by NOBODY (OOPS!).
>+
>+        Deal with overscrollCustomizationEnabled.
>+
>+        * DumpRenderTree/TestOptions.cpp:
>+        (TestOptions::TestOptions):
>+        * DumpRenderTree/TestOptions.h:
>+        * DumpRenderTree/mac/DumpRenderTree.mm:
>+        (enableExperimentalFeatures):
>+        (setWebPreferencesForTestOptions):
>+        * Scripts/webkitperl/FeatureList.pm:
>+        * TestWebKitAPI/Configurations/FeatureDefines.xcconfig:
>+
> 2020-03-09  Jonathan Bedard  <jbedard@apple.com>
> 
>         resultsdbpy: Add tool to manage resultsdbpy container
>diff --git a/Tools/DumpRenderTree/TestOptions.cpp b/Tools/DumpRenderTree/TestOptions.cpp
>index 290606a2558e8881d36de840cc52da7d349773d8..6469a6e8b8190d6ec1526c2f163632fe5001e27b 100644
>--- a/Tools/DumpRenderTree/TestOptions.cpp
>+++ b/Tools/DumpRenderTree/TestOptions.cpp
>@@ -156,6 +156,8 @@ TestOptions::TestOptions(const std::string& pathOrURL, const std::string& absolu
>             enableAspectRatioOfImgFromWidthAndHeight = parseBooleanTestHeaderValue(value);
>         else if (key == "allowTopNavigationToDataURLs")
>             allowTopNavigationToDataURLs = parseBooleanTestHeaderValue(value);
>+        else if (key == "experimental:OverscrollCustomizationEnabled")
>+            enableOverscrollCustomization = parseBooleanTestHeaderValue(value);
>         pairStart = pairEnd + 1;
>     }
> }
>diff --git a/Tools/DumpRenderTree/TestOptions.h b/Tools/DumpRenderTree/TestOptions.h
>index ae4ba4ad5d67746af03dd6ba803dfa70682a0ecc..7774b41a55c1958d0b77f0bd6e343d5a4f6494a4 100644
>--- a/Tools/DumpRenderTree/TestOptions.h
>+++ b/Tools/DumpRenderTree/TestOptions.h
>@@ -58,6 +58,7 @@ struct TestOptions {
>     bool enableAspectRatioOfImgFromWidthAndHeight { false };
>     bool enableWebSQL { true };
>     bool allowTopNavigationToDataURLs { true };
>+    bool enableOverscrollCustomization { false };
>     std::string jscOptions;
>     std::string additionalSupportedImageTypes;
> 
>diff --git a/Tools/DumpRenderTree/mac/DumpRenderTree.mm b/Tools/DumpRenderTree/mac/DumpRenderTree.mm
>index bfb202ebba566d716d1e3cd713dde504e0b45ec2..a3f613c680f047f40952b957a7077a3500823509 100644
>--- a/Tools/DumpRenderTree/mac/DumpRenderTree.mm
>+++ b/Tools/DumpRenderTree/mac/DumpRenderTree.mm
>@@ -886,6 +886,7 @@ static void enableExperimentalFeatures(WebPreferences* preferences)
>     [preferences setCSSShadowPartsEnabled:YES];
>     [preferences setAspectRatioOfImgFromWidthAndHeightEnabled:YES];
>     [preferences setCSSOMViewSmoothScrollingEnabled:YES];
>+    [preferences setOverscrollCustomizationEnabled:YES];
> }
> 
> // Called before each test.
>@@ -1044,6 +1045,7 @@ static void setWebPreferencesForTestOptions(const TestOptions& options)
>     preferences.layoutFormattingContextIntegrationEnabled = options.layoutFormattingContextIntegrationEnabled;
>     preferences.aspectRatioOfImgFromWidthAndHeightEnabled = options.enableAspectRatioOfImgFromWidthAndHeight;
>     preferences.allowTopNavigationToDataURLs = options.allowTopNavigationToDataURLs;
>+    preferences.overscrollCustomizationEnabled = options.enableOverscrollCustomization;
> }
> 
> // Called once on DumpRenderTree startup.
>diff --git a/Tools/Scripts/webkitperl/FeatureList.pm b/Tools/Scripts/webkitperl/FeatureList.pm
>index b2b53473cd0e4c86c037127a34f4968da5b82fdc..c718956f19242b1ac02275f1dc04ac485e650b48 100644
>--- a/Tools/Scripts/webkitperl/FeatureList.pm
>+++ b/Tools/Scripts/webkitperl/FeatureList.pm
>@@ -136,6 +136,7 @@ my (
>     $notificationsSupport,
>     $offscreenCanvasSupport,
>     $orientationEventsSupport,
>+    $overscrollCustomizationSupport,
>     $paymentRequestSupport,
>     $pdfkitPluginSupport,
>     $pictureInPictureAPISupport,
>@@ -437,6 +438,9 @@ my @features = (
>     { option => "orientation-events", desc => "Toggle Orientation Events support",
>       define => "ENABLE_ORIENTATION_EVENTS", value => \$orientationEventsSupport },
> 
>+    { option => "overscroll-customization", desc => "Enable Overscroll Customization support",
>+      define => "ENABLE_OVERSCROLL_CUSTOMIZATION", value => \$overscrollCustomizationSupport },
>+
>     { option => "payment-request", desc => "Toggle Payment Request support",
>       define => "ENABLE_PAYMENT_REQUEST", value => \$paymentRequestSupport },
> 
>diff --git a/Tools/TestWebKitAPI/Configurations/FeatureDefines.xcconfig b/Tools/TestWebKitAPI/Configurations/FeatureDefines.xcconfig
>index af9c12646c7fab536d8ba3285352119497b4d332..b4855de0c5233d139956a65ce0113150cd9b0d56 100644
>--- a/Tools/TestWebKitAPI/Configurations/FeatureDefines.xcconfig
>+++ b/Tools/TestWebKitAPI/Configurations/FeatureDefines.xcconfig
>@@ -301,6 +301,8 @@ ENABLE_OFFSCREEN_CANVAS = ;
> ENABLE_OVERFLOW_SCROLLING_TOUCH = $(ENABLE_OVERFLOW_SCROLLING_TOUCH_$(WK_COCOA_TOUCH));
> ENABLE_OVERFLOW_SCROLLING_TOUCH_cocoatouch = ENABLE_OVERFLOW_SCROLLING_TOUCH;
> 
>+ENABLE_OVERSCROLL_CUSTOMIZATION = ENABLE_OVERSCROLL_CUSTOMIZATION;
>+
> ENABLE_PAYMENT_REQUEST = ENABLE_PAYMENT_REQUEST;
> 
> ENABLE_PICTURE_IN_PICTURE_API = $(ENABLE_PICTURE_IN_PICTURE_API_$(WK_PLATFORM_NAME));
>@@ -430,4 +432,4 @@ ENABLE_WIRELESS_PLAYBACK_TARGET = ENABLE_WIRELESS_PLAYBACK_TARGET;
> 
> ENABLE_XSLT = ENABLE_XSLT;
> 
>-FEATURE_DEFINES = $(ENABLE_3D_TRANSFORMS) $(ENABLE_ACCELERATED_2D_CANVAS) $(ENABLE_ACCESSIBILITY_ISOLATED_TREE) $(ENABLE_APPLE_PAY) $(ENABLE_APPLE_PAY_SESSION_V3) $(ENABLE_APPLE_PAY_SESSION_V4) $(ENABLE_APPLE_PAY_SESSION_V9) $(ENABLE_APPLICATION_MANIFEST) $(ENABLE_ATTACHMENT_ELEMENT) $(ENABLE_AVF_CAPTIONS) $(ENABLE_CACHE_PARTITIONING) $(ENABLE_CHANNEL_MESSAGING) $(ENABLE_CONTENT_FILTERING) $(ENABLE_CSS3_TEXT) $(ENABLE_CSS_BOX_DECORATION_BREAK) $(ENABLE_CSS_COMPOSITING) $(ENABLE_CSS_CONIC_GRADIENTS) $(ENABLE_CSS_IMAGE_RESOLUTION) $(ENABLE_CSS_PAINTING_API) $(ENABLE_CSS_SCROLL_SNAP) $(ENABLE_CSS_SELECTORS_LEVEL4) $(ENABLE_CSS_TRAILING_WORD) $(ENABLE_CSS_TYPED_OM) $(ENABLE_CURSOR_VISIBILITY) $(ENABLE_CUSTOM_SCHEME_HANDLER) $(ENABLE_C_LOOP) $(ENABLE_DARK_MODE_CSS) $(ENABLE_DATACUE_VALUE) $(ENABLE_DATALIST_ELEMENT) $(ENABLE_DATA_INTERACTION) $(ENABLE_DEVICE_ORIENTATION) $(ENABLE_DRAG_SUPPORT) $(ENABLE_ENCRYPTED_MEDIA) $(ENABLE_EXPERIMENTAL_FEATURES) $(ENABLE_FILTERS_LEVEL_2) $(ENABLE_FULLSCREEN_API) $(ENABLE_PICTURE_IN_PICTURE_API) $(ENABLE_GAMEPAD) $(ENABLE_GEOLOCATION) $(ENABLE_GPU_PROCESS) $(ENABLE_INDEXED_DATABASE) $(ENABLE_INDEXED_DATABASE_IN_WORKERS) $(ENABLE_INPUT_TYPE_COLOR) $(ENABLE_INPUT_TYPE_DATE) $(ENABLE_INPUT_TYPE_DATETIMELOCAL) $(ENABLE_INPUT_TYPE_DATETIME_INCOMPLETE) $(ENABLE_INPUT_TYPE_MONTH) $(ENABLE_INPUT_TYPE_TIME) $(ENABLE_INPUT_TYPE_WEEK) $(ENABLE_INSPECTOR_ALTERNATE_DISPATCHERS) $(ENABLE_INSPECTOR_TELEMETRY) $(ENABLE_INTERSECTION_OBSERVER) $(ENABLE_IOS_GESTURE_EVENTS) $(ENABLE_IOS_TOUCH_EVENTS) $(ENABLE_LAYOUT_FORMATTING_CONTEXT) $(ENABLE_LEGACY_CSS_VENDOR_PREFIXES) $(ENABLE_LEGACY_CUSTOM_PROTOCOL_MANAGER) $(ENABLE_LEGACY_ENCRYPTED_MEDIA) $(ENABLE_LETTERPRESS) $(ENABLE_MAC_GESTURE_EVENTS) $(ENABLE_MAC_VIDEO_TOOLBOX) $(ENABLE_MATHML) $(ENABLE_MEDIA_CAPTURE) $(ENABLE_MEDIA_CONTROLS_SCRIPT) $(ENABLE_MEDIA_SESSION) $(ENABLE_MEDIA_SOURCE) $(ENABLE_MEDIA_STATISTICS) $(ENABLE_MEDIA_STREAM) $(ENABLE_MEMORY_SAMPLER) $(ENABLE_METER_ELEMENT) $(ENABLE_MHTML) $(ENABLE_MOUSE_CURSOR_SCALE) $(ENABLE_NAVIGATOR_STANDALONE) $(ENABLE_NETWORK_CACHE_SPECULATIVE_REVALIDATION) $(ENABLE_NETWORK_CACHE_STALE_WHILE_REVALIDATE) $(ENABLE_NOTIFICATIONS) $(ENABLE_OFFSCREEN_CANVAS) $(ENABLE_OVERFLOW_SCROLLING_TOUCH) $(ENABLE_PAYMENT_REQUEST) $(ENABLE_PDFKIT_PLUGIN) $(ENABLE_POINTER_EVENTS) $(ENABLE_POINTER_LOCK) $(ENABLE_PUBLIC_SUFFIX_LIST) $(ENABLE_QUOTA) $(ENABLE_REMOTE_INSPECTOR) $(ENABLE_RESIZE_OBSERVER) $(ENABLE_RESOLUTION_MEDIA_QUERY) $(ENABLE_RESOURCE_LOAD_STATISTICS) $(ENABLE_RESOURCE_USAGE) $(ENABLE_RUBBER_BANDING) $(ENABLE_SANDBOX_EXTENSIONS) $(ENABLE_SERVER_PRECONNECT) $(ENABLE_SERVICE_CONTROLS) $(ENABLE_SERVICE_WORKER) $(ENABLE_SHAREABLE_RESOURCE) $(ENABLE_SPEECH_SYNTHESIS) $(ENABLE_STREAMS_API) $(ENABLE_SVG_FONTS) $(ENABLE_TELEPHONE_NUMBER_DETECTION) $(ENABLE_TEXT_AUTOSIZING) $(ENABLE_TOUCH_EVENTS) $(ENABLE_USERSELECT_ALL) $(ENABLE_USER_MESSAGE_HANDLERS) $(ENABLE_VARIATION_FONTS) $(ENABLE_VIDEO) $(ENABLE_VIDEO_PRESENTATION_MODE) $(ENABLE_VIDEO_TRACK) $(ENABLE_VIDEO_USES_ELEMENT_FULLSCREEN) $(ENABLE_WEBDRIVER_MOUSE_INTERACTIONS) $(ENABLE_WEBDRIVER_KEYBOARD_INTERACTIONS) $(ENABLE_WEBDRIVER_TOUCH_INTERACTIONS) $(ENABLE_WEBGL) $(ENABLE_WEBGL2) $(ENABLE_WEBGPU) $(ENABLE_WEB_API_STATISTICS) $(ENABLE_WEB_AUDIO) $(ENABLE_WEB_AUTHN) $(ENABLE_WEB_CRYPTO) $(ENABLE_WEB_RTC) $(ENABLE_WIRELESS_PLAYBACK_TARGET) $(ENABLE_XSLT);
>+FEATURE_DEFINES = $(ENABLE_3D_TRANSFORMS) $(ENABLE_ACCELERATED_2D_CANVAS) $(ENABLE_ACCESSIBILITY_ISOLATED_TREE) $(ENABLE_APPLE_PAY) $(ENABLE_APPLE_PAY_SESSION_V3) $(ENABLE_APPLE_PAY_SESSION_V4) $(ENABLE_APPLE_PAY_SESSION_V9) $(ENABLE_APPLICATION_MANIFEST) $(ENABLE_ATTACHMENT_ELEMENT) $(ENABLE_AVF_CAPTIONS) $(ENABLE_CACHE_PARTITIONING) $(ENABLE_CHANNEL_MESSAGING) $(ENABLE_CONTENT_FILTERING) $(ENABLE_CSS3_TEXT) $(ENABLE_CSS_BOX_DECORATION_BREAK) $(ENABLE_CSS_COMPOSITING) $(ENABLE_CSS_CONIC_GRADIENTS) $(ENABLE_CSS_IMAGE_RESOLUTION) $(ENABLE_CSS_PAINTING_API) $(ENABLE_CSS_SCROLL_SNAP) $(ENABLE_CSS_SELECTORS_LEVEL4) $(ENABLE_CSS_TRAILING_WORD) $(ENABLE_CSS_TYPED_OM) $(ENABLE_CURSOR_VISIBILITY) $(ENABLE_CUSTOM_SCHEME_HANDLER) $(ENABLE_C_LOOP) $(ENABLE_DARK_MODE_CSS) $(ENABLE_DATACUE_VALUE) $(ENABLE_DATALIST_ELEMENT) $(ENABLE_DATA_INTERACTION) $(ENABLE_DEVICE_ORIENTATION) $(ENABLE_DRAG_SUPPORT) $(ENABLE_ENCRYPTED_MEDIA) $(ENABLE_EXPERIMENTAL_FEATURES) $(ENABLE_FILTERS_LEVEL_2) $(ENABLE_FULLSCREEN_API) $(ENABLE_PICTURE_IN_PICTURE_API) $(ENABLE_GAMEPAD) $(ENABLE_GEOLOCATION) $(ENABLE_GPU_PROCESS) $(ENABLE_INDEXED_DATABASE) $(ENABLE_INDEXED_DATABASE_IN_WORKERS) $(ENABLE_INPUT_TYPE_COLOR) $(ENABLE_INPUT_TYPE_DATE) $(ENABLE_INPUT_TYPE_DATETIMELOCAL) $(ENABLE_INPUT_TYPE_DATETIME_INCOMPLETE) $(ENABLE_INPUT_TYPE_MONTH) $(ENABLE_INPUT_TYPE_TIME) $(ENABLE_INPUT_TYPE_WEEK) $(ENABLE_INSPECTOR_ALTERNATE_DISPATCHERS) $(ENABLE_INSPECTOR_TELEMETRY) $(ENABLE_INTERSECTION_OBSERVER) $(ENABLE_IOS_GESTURE_EVENTS) $(ENABLE_IOS_TOUCH_EVENTS) $(ENABLE_LAYOUT_FORMATTING_CONTEXT) $(ENABLE_LEGACY_CSS_VENDOR_PREFIXES) $(ENABLE_LEGACY_CUSTOM_PROTOCOL_MANAGER) $(ENABLE_LEGACY_ENCRYPTED_MEDIA) $(ENABLE_LETTERPRESS) $(ENABLE_MAC_GESTURE_EVENTS) $(ENABLE_MAC_VIDEO_TOOLBOX) $(ENABLE_MATHML) $(ENABLE_MEDIA_CAPTURE) $(ENABLE_MEDIA_CONTROLS_SCRIPT) $(ENABLE_MEDIA_SESSION) $(ENABLE_MEDIA_SOURCE) $(ENABLE_MEDIA_STATISTICS) $(ENABLE_MEDIA_STREAM) $(ENABLE_MEMORY_SAMPLER) $(ENABLE_METER_ELEMENT) $(ENABLE_MHTML) $(ENABLE_MOUSE_CURSOR_SCALE) $(ENABLE_NAVIGATOR_STANDALONE) $(ENABLE_NETWORK_CACHE_SPECULATIVE_REVALIDATION) $(ENABLE_NETWORK_CACHE_STALE_WHILE_REVALIDATE) $(ENABLE_NOTIFICATIONS) $(ENABLE_OFFSCREEN_CANVAS) $(ENABLE_OVERFLOW_SCROLLING_TOUCH) $(ENABLE_OVERSCROLL_CUSTOMIZATION) $(ENABLE_PAYMENT_REQUEST) $(ENABLE_PDFKIT_PLUGIN) $(ENABLE_POINTER_EVENTS) $(ENABLE_POINTER_LOCK) $(ENABLE_PUBLIC_SUFFIX_LIST) $(ENABLE_QUOTA) $(ENABLE_REMOTE_INSPECTOR) $(ENABLE_RESIZE_OBSERVER) $(ENABLE_RESOLUTION_MEDIA_QUERY) $(ENABLE_RESOURCE_LOAD_STATISTICS) $(ENABLE_RESOURCE_USAGE) $(ENABLE_RUBBER_BANDING) $(ENABLE_SANDBOX_EXTENSIONS) $(ENABLE_SERVER_PRECONNECT) $(ENABLE_SERVICE_CONTROLS) $(ENABLE_SERVICE_WORKER) $(ENABLE_SHAREABLE_RESOURCE) $(ENABLE_SPEECH_SYNTHESIS) $(ENABLE_STREAMS_API) $(ENABLE_SVG_FONTS) $(ENABLE_TELEPHONE_NUMBER_DETECTION) $(ENABLE_TEXT_AUTOSIZING) $(ENABLE_TOUCH_EVENTS) $(ENABLE_USERSELECT_ALL) $(ENABLE_USER_MESSAGE_HANDLERS) $(ENABLE_VARIATION_FONTS) $(ENABLE_VIDEO) $(ENABLE_VIDEO_PRESENTATION_MODE) $(ENABLE_VIDEO_TRACK) $(ENABLE_VIDEO_USES_ELEMENT_FULLSCREEN) $(ENABLE_WEBDRIVER_MOUSE_INTERACTIONS) $(ENABLE_WEBDRIVER_KEYBOARD_INTERACTIONS) $(ENABLE_WEBDRIVER_TOUCH_INTERACTIONS) $(ENABLE_WEBGL) $(ENABLE_WEBGL2) $(ENABLE_WEBGPU) $(ENABLE_WEB_API_STATISTICS) $(ENABLE_WEB_AUDIO) $(ENABLE_WEB_AUTHN) $(ENABLE_WEB_CRYPTO) $(ENABLE_WEB_RTC) $(ENABLE_WIRELESS_PLAYBACK_TARGET) $(ENABLE_XSLT);
>diff --git a/ChangeLog b/ChangeLog
>index 8f85012360492053fd033adc5dd6d8dd1b17a9dd..dd03326c4c03a222da14c054b6b8b428e275db71 100644
>--- a/ChangeLog
>+++ b/ChangeLog
>@@ -1,3 +1,14 @@
>+2020-03-09  Cathie Chen  <cathiechen@igalia.com>
>+
>+        Add support for overscroll customization parsing
>+        https://bugs.webkit.org/show_bug.cgi?id=208802
>+
>+        Reviewed by NOBODY (OOPS!).
>+
>+        Add ENABLE_OVERSCROLL_CUSTOMIZATION which is off by default.
>+
>+        * Source/cmake/WebKitFeatures.cmake:
>+
> 2020-03-03  Fujii Hironori  <fujii.hironori@gmail.com>
> 
>         [Curl] Add TLS debugging feature to log encryption keys

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Attachments on bug 208802: 393035 | 393036 | 393120 | 393122 | 393124 | 393384 | 393388 | 396050