Attachment 352356 Details for Bug 190499 – Patch

[patch] Patch

bug-190499-20181015121509.patch (text/plain), 75.12 KB, created by Timothy Hatcher on 2018-10-15 12:15:10 PDT

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Creator: Timothy Hatcher

Created: 2018-10-15 12:15:10 PDT

Size: 75.12 KB

patch

obsolete

>Subversion Revision: 237009
>diff --git a/Source/JavaScriptCore/ChangeLog b/Source/JavaScriptCore/ChangeLog
>index 7deabbc9e8d7898585375ea36339b314d3cbb7e6..b70a5ddfb47bc7714bdd13e259e16ff468d016ce 100644
>--- a/Source/JavaScriptCore/ChangeLog
>+++ b/Source/JavaScriptCore/ChangeLog
>@@ -1,3 +1,13 @@
>+2018-10-11  Timothy Hatcher  <timothy@apple.com>
>+
>+        Add support for prefers-color-scheme media query
>+        https://bugs.webkit.org/show_bug.cgi?id=190499
>+        rdar://problem/45212025
>+
>+        Reviewed by Dean Jackson.
>+
>+        * Configurations/FeatureDefines.xcconfig: Added ENABLE_DARK_MODE_CSS.
>+
> 2018-10-10  Yusuke Suzuki  <yusukesuzuki@slowstart.org>
> 
>         [JSC] Rename createXXX to tryCreateXXX if it can return RefPtr
>diff --git a/Source/WTF/ChangeLog b/Source/WTF/ChangeLog
>index 9def95f96ab6ae1cbd9c0103b2de483acba87453..797be2d1e24613ab049e4bf57ab31f53c7156d43 100644
>--- a/Source/WTF/ChangeLog
>+++ b/Source/WTF/ChangeLog
>@@ -1,3 +1,13 @@
>+2018-10-11  Timothy Hatcher  <timothy@apple.com>
>+
>+        Add support for prefers-color-scheme media query
>+        https://bugs.webkit.org/show_bug.cgi?id=190499
>+        rdar://problem/45212025
>+
>+        Reviewed by Dean Jackson.
>+
>+        * wtf/FeatureDefines.h: Added ENABLE_DARK_MODE_CSS.
>+
> 2018-10-09  Mark Lam  <mark.lam@apple.com>
> 
>         StringTypeAdapter constructor is not properly enforcing String::MaxLength.
>diff --git a/Source/WebCore/ChangeLog b/Source/WebCore/ChangeLog
>index 553b7098d755730d3a1aa59d1f9ecdfa2c3de5f6..9bfd14b63bead89e0c2e32d0c0218bd4c3c9e4cd 100644
>--- a/Source/WebCore/ChangeLog
>+++ b/Source/WebCore/ChangeLog
>@@ -1,3 +1,29 @@
>+2018-10-11  Timothy Hatcher  <timothy@apple.com>
>+
>+        Add support for prefers-color-scheme media query
>+        https://bugs.webkit.org/show_bug.cgi?id=190499
>+        rdar://problem/45212025
>+
>+        Reviewed by Dean Jackson.
>+
>+        Test: css-dark-mode/prefers-color-scheme.html
>+
>+        * Configurations/FeatureDefines.xcconfig: Added ENABLE_DARK_MODE_CSS.
>+        * css/CSSValueKeywords.in: Added light and dark.
>+        * css/MediaFeatureNames.h: Added prefers-color-scheme.
>+        * css/MediaQueryEvaluator.cpp:
>+        (WebCore::prefersColorSchemeEvaluate): Added.
>+        * css/MediaQueryExpression.cpp:
>+        (WebCore::featureWithValidIdent): Added prefers-color-scheme.
>+        * page/RuntimeEnabledFeatures.h:
>+        (WebCore::RuntimeEnabledFeatures::setDarkModeCSSEnabled): Added.
>+        (WebCore::RuntimeEnabledFeatures::darkModeCSSEnabled const): Added.
>+        * testing/InternalSettings.cpp:
>+        (WebCore::InternalSettings::resetToConsistentState): Reset setUseDarkAppearance.
>+        (WebCore::InternalSettings::setUseDarkAppearance): Added.
>+        * testing/InternalSettings.h: Added setUseDarkAppearance.
>+        * testing/InternalSettings.idl: Ditto.
>+
> 2018-10-10  Yusuke Suzuki  <yusukesuzuki@slowstart.org>
> 
>         [JSC] Rename createXXX to tryCreateXXX if it can return RefPtr
>diff --git a/Source/WebCore/PAL/ChangeLog b/Source/WebCore/PAL/ChangeLog
>index 650f653d19c3bdbcdda29a459ffcdedd04324971..abddb64ff3561359a47680651bd876ded0e94ced 100644
>--- a/Source/WebCore/PAL/ChangeLog
>+++ b/Source/WebCore/PAL/ChangeLog
>@@ -1,3 +1,13 @@
>+2018-10-11  Timothy Hatcher  <timothy@apple.com>
>+
>+        Add support for prefers-color-scheme media query
>+        https://bugs.webkit.org/show_bug.cgi?id=190499
>+        rdar://problem/45212025
>+
>+        Reviewed by Dean Jackson.
>+
>+        * Configurations/FeatureDefines.xcconfig: Added ENABLE_DARK_MODE_CSS.
>+
> 2018-10-08  Wenson Hsieh  <wenson_hsieh@apple.com>
> 
>         [Cocoa] [WK2] Add support for text alignment and text lists in font attributes
>diff --git a/Source/WebKit/ChangeLog b/Source/WebKit/ChangeLog
>index 25b345db55055b29914801d258ce4381f02ad427..a424d9dd998a2b53fbe68173c6c30aa80a600d78 100644
>--- a/Source/WebKit/ChangeLog
>+++ b/Source/WebKit/ChangeLog
>@@ -1,3 +1,14 @@
>+2018-10-11  Timothy Hatcher  <timothy@apple.com>
>+
>+        Add support for prefers-color-scheme media query
>+        https://bugs.webkit.org/show_bug.cgi?id=190499
>+        rdar://problem/45212025
>+
>+        Reviewed by Dean Jackson.
>+
>+        * Configurations/FeatureDefines.xcconfig: Added ENABLE_DARK_MODE_CSS.
>+        * Shared/WebPreferences.yaml: Added DarkModeCSSEnabled as experimental.
>+
> 2018-10-10  Yusuke Suzuki  <yusukesuzuki@slowstart.org>
> 
>         [JSC] Rename createXXX to tryCreateXXX if it can return RefPtr
>diff --git a/Source/WebKitLegacy/mac/ChangeLog b/Source/WebKitLegacy/mac/ChangeLog
>index 42c526466747a8f771eb3295931f5909dfd53106..0df7417e6e9f1c149e42c10e2edf2ee4a5b0e3f3 100644
>--- a/Source/WebKitLegacy/mac/ChangeLog
>+++ b/Source/WebKitLegacy/mac/ChangeLog
>@@ -1,3 +1,13 @@
>+2018-10-11  Timothy Hatcher  <timothy@apple.com>
>+
>+        Add support for prefers-color-scheme media query
>+        https://bugs.webkit.org/show_bug.cgi?id=190499
>+        rdar://problem/45212025
>+
>+        Reviewed by Dean Jackson.
>+
>+        * Configurations/FeatureDefines.xcconfig: Added ENABLE_DARK_MODE_CSS.
>+
> 2018-10-10  Yusuke Suzuki  <yusukesuzuki@slowstart.org>
> 
>         [JSC] Rename createXXX to tryCreateXXX if it can return RefPtr
>diff --git a/Source/JavaScriptCore/Configurations/FeatureDefines.xcconfig b/Source/JavaScriptCore/Configurations/FeatureDefines.xcconfig
>index 689ed00bdb0f5e59abefa77265c0d4f2a249733b..78c7ec233c02487088f4ac09d3dee2e4ca248807 100644
>--- a/Source/JavaScriptCore/Configurations/FeatureDefines.xcconfig
>+++ b/Source/JavaScriptCore/Configurations/FeatureDefines.xcconfig
>@@ -96,6 +96,10 @@ ENABLE_CURSOR_VISIBILITY = ENABLE_CURSOR_VISIBILITY;
> 
> ENABLE_CUSTOM_SCHEME_HANDLER = ;
> 
>+ENABLE_DARK_MODE_CSS = $(ENABLE_DARK_MODE_CSS_$(WK_PLATFORM_NAME));
>+ENABLE_DARK_MODE_CSS_macosx = $(ENABLE_DARK_MODE_CSS$(WK_MACOS_1014));
>+ENABLE_DARK_MODE_CSS_MACOS_SINCE_1014 = ENABLE_DARK_MODE_CSS;
>+
> ENABLE_DASHBOARD_SUPPORT = $(ENABLE_DASHBOARD_SUPPORT_$(WK_PLATFORM_NAME));
> ENABLE_DASHBOARD_SUPPORT_macosx = ENABLE_DASHBOARD_SUPPORT;
> 
>@@ -372,4 +376,4 @@ ENABLE_WIRELESS_PLAYBACK_TARGET = ENABLE_WIRELESS_PLAYBACK_TARGET;
> 
> ENABLE_XSLT = ENABLE_XSLT;
> 
>-FEATURE_DEFINES = $(ENABLE_3D_TRANSFORMS) $(ENABLE_ACCELERATED_2D_CANVAS) $(ENABLE_ACCELERATED_OVERFLOW_SCROLLING) $(ENABLE_APPLE_PAY) $(ENABLE_APPLE_PAY_SESSION_V3) $(ENABLE_APPLE_PAY_SESSION_V4) $(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_DEVICE_ADAPTATION) $(ENABLE_CSS_IMAGE_ORIENTATION) $(ENABLE_CSS_IMAGE_RESOLUTION) $(ENABLE_CSS_SCROLL_SNAP) $(ENABLE_CSS_SELECTORS_LEVEL4) $(ENABLE_CSS_TRAILING_WORD) $(ENABLE_CURSOR_VISIBILITY) $(ENABLE_CUSTOM_SCHEME_HANDLER) $(ENABLE_DASHBOARD_SUPPORT) $(ENABLE_DATA_INTERACTION) $(ENABLE_DATACUE_VALUE) $(ENABLE_DATALIST_ELEMENT) $(ENABLE_DEVICE_ORIENTATION) $(ENABLE_DRAG_SUPPORT) $(ENABLE_ENCRYPTED_MEDIA) $(ENABLE_EXPERIMENTAL_FEATURES) $(ENABLE_FAST_JIT_PERMISSIONS) $(ENABLE_FILTERS_LEVEL_2) $(ENABLE_FTL_JIT) $(ENABLE_FULLSCREEN_API) $(ENABLE_GAMEPAD) $(ENABLE_GEOLOCATION) $(ENABLE_ICONDATABASE) $(ENABLE_INDEXED_DATABASE) $(ENABLE_INDEXED_DATABASE_IN_WORKERS) $(ENABLE_INPUT_TYPE_COLOR) $(ENABLE_INPUT_TYPE_DATE) $(ENABLE_INPUT_TYPE_DATETIME_INCOMPLETE) $(ENABLE_INPUT_TYPE_DATETIMELOCAL) $(ENABLE_INPUT_TYPE_MONTH) $(ENABLE_INPUT_TYPE_TIME) $(ENABLE_INPUT_TYPE_WEEK) $(ENABLE_INTERSECTION_OBSERVER) $(ENABLE_INTL) $(ENABLE_IOS_GESTURE_EVENTS) $(ENABLE_IOS_TOUCH_EVENTS) $(ENABLE_JIT) $(ENABLE_JS_ASYNC_ITERATION) $(ENABLE_KEYBOARD_CODE_ATTRIBUTE) $(ENABLE_KEYBOARD_KEY_ATTRIBUTE) $(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_METER_ELEMENT) $(ENABLE_MHTML) $(ENABLE_MOUSE_CURSOR_SCALE) $(ENABLE_NAVIGATOR_CONTENT_UTILS) $(ENABLE_NAVIGATOR_STANDALONE) $(ENABLE_NOTIFICATIONS) $(ENABLE_PAYMENT_REQUEST) $(ENABLE_PDFKIT_PLUGIN) $(ENABLE_POINTER_LOCK) $(ENABLE_PUBLIC_SUFFIX_LIST) $(ENABLE_QUOTA) $(ENABLE_REMOTE_INSPECTOR) $(ENABLE_RESOLUTION_MEDIA_QUERY) $(ENABLE_RESOURCE_USAGE) $(ENABLE_RUBBER_BANDING) $(ENABLE_SERVICE_CONTROLS) $(ENABLE_SERVICE_WORKER) $(ENABLE_SPEECH_SYNTHESIS) $(ENABLE_STREAMS_API) $(ENABLE_SUBTLE_CRYPTO) $(ENABLE_SVG_FONTS) $(ENABLE_TELEPHONE_NUMBER_DETECTION) $(ENABLE_TEXT_AUTOSIZING) $(ENABLE_TOUCH_EVENTS) $(ENABLE_USER_MESSAGE_HANDLERS) $(ENABLE_USERSELECT_ALL) $(ENABLE_VARIATION_FONTS) $(ENABLE_VIDEO) $(ENABLE_VIDEO_PRESENTATION_MODE) $(ENABLE_VIDEO_TRACK) $(ENABLE_VIDEO_USES_ELEMENT_FULLSCREEN) $(ENABLE_WEB_AUDIO) $(ENABLE_WEB_AUTHN) $(ENABLE_WEB_RTC) $(ENABLE_WEBASSEMBLY) $(ENABLE_WEBASSEMBLY_STREAMING_API) $(ENABLE_WEBGL) $(ENABLE_WEBGL2) $(ENABLE_WEBMETAL) $(ENABLE_WIRELESS_PLAYBACK_TARGET) $(ENABLE_XSLT);
>+FEATURE_DEFINES = $(ENABLE_3D_TRANSFORMS) $(ENABLE_ACCELERATED_2D_CANVAS) $(ENABLE_ACCELERATED_OVERFLOW_SCROLLING) $(ENABLE_APPLE_PAY) $(ENABLE_APPLE_PAY_SESSION_V3) $(ENABLE_APPLE_PAY_SESSION_V4) $(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_DEVICE_ADAPTATION) $(ENABLE_CSS_IMAGE_ORIENTATION) $(ENABLE_CSS_IMAGE_RESOLUTION) $(ENABLE_CSS_SCROLL_SNAP) $(ENABLE_CSS_SELECTORS_LEVEL4) $(ENABLE_CSS_TRAILING_WORD) $(ENABLE_CURSOR_VISIBILITY) $(ENABLE_CUSTOM_SCHEME_HANDLER) $(ENABLE_DARK_MODE_CSS) $(ENABLE_DASHBOARD_SUPPORT) $(ENABLE_DATA_INTERACTION) $(ENABLE_DATACUE_VALUE) $(ENABLE_DATALIST_ELEMENT) $(ENABLE_DEVICE_ORIENTATION) $(ENABLE_DRAG_SUPPORT) $(ENABLE_ENCRYPTED_MEDIA) $(ENABLE_EXPERIMENTAL_FEATURES) $(ENABLE_FAST_JIT_PERMISSIONS) $(ENABLE_FILTERS_LEVEL_2) $(ENABLE_FTL_JIT) $(ENABLE_FULLSCREEN_API) $(ENABLE_GAMEPAD) $(ENABLE_GEOLOCATION) $(ENABLE_ICONDATABASE) $(ENABLE_INDEXED_DATABASE) $(ENABLE_INDEXED_DATABASE_IN_WORKERS) $(ENABLE_INPUT_TYPE_COLOR) $(ENABLE_INPUT_TYPE_DATE) $(ENABLE_INPUT_TYPE_DATETIME_INCOMPLETE) $(ENABLE_INPUT_TYPE_DATETIMELOCAL) $(ENABLE_INPUT_TYPE_MONTH) $(ENABLE_INPUT_TYPE_TIME) $(ENABLE_INPUT_TYPE_WEEK) $(ENABLE_INTERSECTION_OBSERVER) $(ENABLE_INTL) $(ENABLE_IOS_GESTURE_EVENTS) $(ENABLE_IOS_TOUCH_EVENTS) $(ENABLE_JIT) $(ENABLE_JS_ASYNC_ITERATION) $(ENABLE_KEYBOARD_CODE_ATTRIBUTE) $(ENABLE_KEYBOARD_KEY_ATTRIBUTE) $(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_METER_ELEMENT) $(ENABLE_MHTML) $(ENABLE_MOUSE_CURSOR_SCALE) $(ENABLE_NAVIGATOR_CONTENT_UTILS) $(ENABLE_NAVIGATOR_STANDALONE) $(ENABLE_NOTIFICATIONS) $(ENABLE_PAYMENT_REQUEST) $(ENABLE_PDFKIT_PLUGIN) $(ENABLE_POINTER_LOCK) $(ENABLE_PUBLIC_SUFFIX_LIST) $(ENABLE_QUOTA) $(ENABLE_REMOTE_INSPECTOR) $(ENABLE_RESOLUTION_MEDIA_QUERY) $(ENABLE_RESOURCE_USAGE) $(ENABLE_RUBBER_BANDING) $(ENABLE_SERVICE_CONTROLS) $(ENABLE_SERVICE_WORKER) $(ENABLE_SPEECH_SYNTHESIS) $(ENABLE_STREAMS_API) $(ENABLE_SUBTLE_CRYPTO) $(ENABLE_SVG_FONTS) $(ENABLE_TELEPHONE_NUMBER_DETECTION) $(ENABLE_TEXT_AUTOSIZING) $(ENABLE_TOUCH_EVENTS) $(ENABLE_USER_MESSAGE_HANDLERS) $(ENABLE_USERSELECT_ALL) $(ENABLE_VARIATION_FONTS) $(ENABLE_VIDEO) $(ENABLE_VIDEO_PRESENTATION_MODE) $(ENABLE_VIDEO_TRACK) $(ENABLE_VIDEO_USES_ELEMENT_FULLSCREEN) $(ENABLE_WEB_AUDIO) $(ENABLE_WEB_AUTHN) $(ENABLE_WEB_RTC) $(ENABLE_WEBASSEMBLY) $(ENABLE_WEBASSEMBLY_STREAMING_API) $(ENABLE_WEBGL) $(ENABLE_WEBGL2) $(ENABLE_WEBMETAL) $(ENABLE_WIRELESS_PLAYBACK_TARGET) $(ENABLE_XSLT);
>diff --git a/Source/WTF/wtf/FeatureDefines.h b/Source/WTF/wtf/FeatureDefines.h
>index d47ad8f152362c8e58b8a65a9e8933c20331a7a1..78a850a1a31c8d64efd3a599ada0be605536232a 100644
>--- a/Source/WTF/wtf/FeatureDefines.h
>+++ b/Source/WTF/wtf/FeatureDefines.h
>@@ -409,6 +409,10 @@ the public iOS SDK. See <https://webkit.org/b/179167>. */
> #define ENABLE_CUSTOM_SCHEME_HANDLER 0
> #endif
> 
>+#if !defined(ENABLE_DARK_MODE_CSS)
>+#define ENABLE_DARK_MODE_CSS 0
>+#endif
>+
> #if !defined(ENABLE_DASHBOARD_SUPPORT)
> #define ENABLE_DASHBOARD_SUPPORT 0
> #endif
>diff --git a/Source/WebCore/Configurations/FeatureDefines.xcconfig b/Source/WebCore/Configurations/FeatureDefines.xcconfig
>index 689ed00bdb0f5e59abefa77265c0d4f2a249733b..78c7ec233c02487088f4ac09d3dee2e4ca248807 100644
>--- a/Source/WebCore/Configurations/FeatureDefines.xcconfig
>+++ b/Source/WebCore/Configurations/FeatureDefines.xcconfig
>@@ -96,6 +96,10 @@ ENABLE_CURSOR_VISIBILITY = ENABLE_CURSOR_VISIBILITY;
> 
> ENABLE_CUSTOM_SCHEME_HANDLER = ;
> 
>+ENABLE_DARK_MODE_CSS = $(ENABLE_DARK_MODE_CSS_$(WK_PLATFORM_NAME));
>+ENABLE_DARK_MODE_CSS_macosx = $(ENABLE_DARK_MODE_CSS$(WK_MACOS_1014));
>+ENABLE_DARK_MODE_CSS_MACOS_SINCE_1014 = ENABLE_DARK_MODE_CSS;
>+
> ENABLE_DASHBOARD_SUPPORT = $(ENABLE_DASHBOARD_SUPPORT_$(WK_PLATFORM_NAME));
> ENABLE_DASHBOARD_SUPPORT_macosx = ENABLE_DASHBOARD_SUPPORT;
> 
>@@ -372,4 +376,4 @@ ENABLE_WIRELESS_PLAYBACK_TARGET = ENABLE_WIRELESS_PLAYBACK_TARGET;
> 
> ENABLE_XSLT = ENABLE_XSLT;
> 
>-FEATURE_DEFINES = $(ENABLE_3D_TRANSFORMS) $(ENABLE_ACCELERATED_2D_CANVAS) $(ENABLE_ACCELERATED_OVERFLOW_SCROLLING) $(ENABLE_APPLE_PAY) $(ENABLE_APPLE_PAY_SESSION_V3) $(ENABLE_APPLE_PAY_SESSION_V4) $(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_DEVICE_ADAPTATION) $(ENABLE_CSS_IMAGE_ORIENTATION) $(ENABLE_CSS_IMAGE_RESOLUTION) $(ENABLE_CSS_SCROLL_SNAP) $(ENABLE_CSS_SELECTORS_LEVEL4) $(ENABLE_CSS_TRAILING_WORD) $(ENABLE_CURSOR_VISIBILITY) $(ENABLE_CUSTOM_SCHEME_HANDLER) $(ENABLE_DASHBOARD_SUPPORT) $(ENABLE_DATA_INTERACTION) $(ENABLE_DATACUE_VALUE) $(ENABLE_DATALIST_ELEMENT) $(ENABLE_DEVICE_ORIENTATION) $(ENABLE_DRAG_SUPPORT) $(ENABLE_ENCRYPTED_MEDIA) $(ENABLE_EXPERIMENTAL_FEATURES) $(ENABLE_FAST_JIT_PERMISSIONS) $(ENABLE_FILTERS_LEVEL_2) $(ENABLE_FTL_JIT) $(ENABLE_FULLSCREEN_API) $(ENABLE_GAMEPAD) $(ENABLE_GEOLOCATION) $(ENABLE_ICONDATABASE) $(ENABLE_INDEXED_DATABASE) $(ENABLE_INDEXED_DATABASE_IN_WORKERS) $(ENABLE_INPUT_TYPE_COLOR) $(ENABLE_INPUT_TYPE_DATE) $(ENABLE_INPUT_TYPE_DATETIME_INCOMPLETE) $(ENABLE_INPUT_TYPE_DATETIMELOCAL) $(ENABLE_INPUT_TYPE_MONTH) $(ENABLE_INPUT_TYPE_TIME) $(ENABLE_INPUT_TYPE_WEEK) $(ENABLE_INTERSECTION_OBSERVER) $(ENABLE_INTL) $(ENABLE_IOS_GESTURE_EVENTS) $(ENABLE_IOS_TOUCH_EVENTS) $(ENABLE_JIT) $(ENABLE_JS_ASYNC_ITERATION) $(ENABLE_KEYBOARD_CODE_ATTRIBUTE) $(ENABLE_KEYBOARD_KEY_ATTRIBUTE) $(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_METER_ELEMENT) $(ENABLE_MHTML) $(ENABLE_MOUSE_CURSOR_SCALE) $(ENABLE_NAVIGATOR_CONTENT_UTILS) $(ENABLE_NAVIGATOR_STANDALONE) $(ENABLE_NOTIFICATIONS) $(ENABLE_PAYMENT_REQUEST) $(ENABLE_PDFKIT_PLUGIN) $(ENABLE_POINTER_LOCK) $(ENABLE_PUBLIC_SUFFIX_LIST) $(ENABLE_QUOTA) $(ENABLE_REMOTE_INSPECTOR) $(ENABLE_RESOLUTION_MEDIA_QUERY) $(ENABLE_RESOURCE_USAGE) $(ENABLE_RUBBER_BANDING) $(ENABLE_SERVICE_CONTROLS) $(ENABLE_SERVICE_WORKER) $(ENABLE_SPEECH_SYNTHESIS) $(ENABLE_STREAMS_API) $(ENABLE_SUBTLE_CRYPTO) $(ENABLE_SVG_FONTS) $(ENABLE_TELEPHONE_NUMBER_DETECTION) $(ENABLE_TEXT_AUTOSIZING) $(ENABLE_TOUCH_EVENTS) $(ENABLE_USER_MESSAGE_HANDLERS) $(ENABLE_USERSELECT_ALL) $(ENABLE_VARIATION_FONTS) $(ENABLE_VIDEO) $(ENABLE_VIDEO_PRESENTATION_MODE) $(ENABLE_VIDEO_TRACK) $(ENABLE_VIDEO_USES_ELEMENT_FULLSCREEN) $(ENABLE_WEB_AUDIO) $(ENABLE_WEB_AUTHN) $(ENABLE_WEB_RTC) $(ENABLE_WEBASSEMBLY) $(ENABLE_WEBASSEMBLY_STREAMING_API) $(ENABLE_WEBGL) $(ENABLE_WEBGL2) $(ENABLE_WEBMETAL) $(ENABLE_WIRELESS_PLAYBACK_TARGET) $(ENABLE_XSLT);
>+FEATURE_DEFINES = $(ENABLE_3D_TRANSFORMS) $(ENABLE_ACCELERATED_2D_CANVAS) $(ENABLE_ACCELERATED_OVERFLOW_SCROLLING) $(ENABLE_APPLE_PAY) $(ENABLE_APPLE_PAY_SESSION_V3) $(ENABLE_APPLE_PAY_SESSION_V4) $(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_DEVICE_ADAPTATION) $(ENABLE_CSS_IMAGE_ORIENTATION) $(ENABLE_CSS_IMAGE_RESOLUTION) $(ENABLE_CSS_SCROLL_SNAP) $(ENABLE_CSS_SELECTORS_LEVEL4) $(ENABLE_CSS_TRAILING_WORD) $(ENABLE_CURSOR_VISIBILITY) $(ENABLE_CUSTOM_SCHEME_HANDLER) $(ENABLE_DARK_MODE_CSS) $(ENABLE_DASHBOARD_SUPPORT) $(ENABLE_DATA_INTERACTION) $(ENABLE_DATACUE_VALUE) $(ENABLE_DATALIST_ELEMENT) $(ENABLE_DEVICE_ORIENTATION) $(ENABLE_DRAG_SUPPORT) $(ENABLE_ENCRYPTED_MEDIA) $(ENABLE_EXPERIMENTAL_FEATURES) $(ENABLE_FAST_JIT_PERMISSIONS) $(ENABLE_FILTERS_LEVEL_2) $(ENABLE_FTL_JIT) $(ENABLE_FULLSCREEN_API) $(ENABLE_GAMEPAD) $(ENABLE_GEOLOCATION) $(ENABLE_ICONDATABASE) $(ENABLE_INDEXED_DATABASE) $(ENABLE_INDEXED_DATABASE_IN_WORKERS) $(ENABLE_INPUT_TYPE_COLOR) $(ENABLE_INPUT_TYPE_DATE) $(ENABLE_INPUT_TYPE_DATETIME_INCOMPLETE) $(ENABLE_INPUT_TYPE_DATETIMELOCAL) $(ENABLE_INPUT_TYPE_MONTH) $(ENABLE_INPUT_TYPE_TIME) $(ENABLE_INPUT_TYPE_WEEK) $(ENABLE_INTERSECTION_OBSERVER) $(ENABLE_INTL) $(ENABLE_IOS_GESTURE_EVENTS) $(ENABLE_IOS_TOUCH_EVENTS) $(ENABLE_JIT) $(ENABLE_JS_ASYNC_ITERATION) $(ENABLE_KEYBOARD_CODE_ATTRIBUTE) $(ENABLE_KEYBOARD_KEY_ATTRIBUTE) $(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_METER_ELEMENT) $(ENABLE_MHTML) $(ENABLE_MOUSE_CURSOR_SCALE) $(ENABLE_NAVIGATOR_CONTENT_UTILS) $(ENABLE_NAVIGATOR_STANDALONE) $(ENABLE_NOTIFICATIONS) $(ENABLE_PAYMENT_REQUEST) $(ENABLE_PDFKIT_PLUGIN) $(ENABLE_POINTER_LOCK) $(ENABLE_PUBLIC_SUFFIX_LIST) $(ENABLE_QUOTA) $(ENABLE_REMOTE_INSPECTOR) $(ENABLE_RESOLUTION_MEDIA_QUERY) $(ENABLE_RESOURCE_USAGE) $(ENABLE_RUBBER_BANDING) $(ENABLE_SERVICE_CONTROLS) $(ENABLE_SERVICE_WORKER) $(ENABLE_SPEECH_SYNTHESIS) $(ENABLE_STREAMS_API) $(ENABLE_SUBTLE_CRYPTO) $(ENABLE_SVG_FONTS) $(ENABLE_TELEPHONE_NUMBER_DETECTION) $(ENABLE_TEXT_AUTOSIZING) $(ENABLE_TOUCH_EVENTS) $(ENABLE_USER_MESSAGE_HANDLERS) $(ENABLE_USERSELECT_ALL) $(ENABLE_VARIATION_FONTS) $(ENABLE_VIDEO) $(ENABLE_VIDEO_PRESENTATION_MODE) $(ENABLE_VIDEO_TRACK) $(ENABLE_VIDEO_USES_ELEMENT_FULLSCREEN) $(ENABLE_WEB_AUDIO) $(ENABLE_WEB_AUTHN) $(ENABLE_WEB_RTC) $(ENABLE_WEBASSEMBLY) $(ENABLE_WEBASSEMBLY_STREAMING_API) $(ENABLE_WEBGL) $(ENABLE_WEBGL2) $(ENABLE_WEBMETAL) $(ENABLE_WIRELESS_PLAYBACK_TARGET) $(ENABLE_XSLT);
>diff --git a/Source/WebCore/PAL/Configurations/FeatureDefines.xcconfig b/Source/WebCore/PAL/Configurations/FeatureDefines.xcconfig
>index 689ed00bdb0f5e59abefa77265c0d4f2a249733b..78c7ec233c02487088f4ac09d3dee2e4ca248807 100644
>--- a/Source/WebCore/PAL/Configurations/FeatureDefines.xcconfig
>+++ b/Source/WebCore/PAL/Configurations/FeatureDefines.xcconfig
>@@ -96,6 +96,10 @@ ENABLE_CURSOR_VISIBILITY = ENABLE_CURSOR_VISIBILITY;
> 
> ENABLE_CUSTOM_SCHEME_HANDLER = ;
> 
>+ENABLE_DARK_MODE_CSS = $(ENABLE_DARK_MODE_CSS_$(WK_PLATFORM_NAME));
>+ENABLE_DARK_MODE_CSS_macosx = $(ENABLE_DARK_MODE_CSS$(WK_MACOS_1014));
>+ENABLE_DARK_MODE_CSS_MACOS_SINCE_1014 = ENABLE_DARK_MODE_CSS;
>+
> ENABLE_DASHBOARD_SUPPORT = $(ENABLE_DASHBOARD_SUPPORT_$(WK_PLATFORM_NAME));
> ENABLE_DASHBOARD_SUPPORT_macosx = ENABLE_DASHBOARD_SUPPORT;
> 
>@@ -372,4 +376,4 @@ ENABLE_WIRELESS_PLAYBACK_TARGET = ENABLE_WIRELESS_PLAYBACK_TARGET;
> 
> ENABLE_XSLT = ENABLE_XSLT;
> 
>-FEATURE_DEFINES = $(ENABLE_3D_TRANSFORMS) $(ENABLE_ACCELERATED_2D_CANVAS) $(ENABLE_ACCELERATED_OVERFLOW_SCROLLING) $(ENABLE_APPLE_PAY) $(ENABLE_APPLE_PAY_SESSION_V3) $(ENABLE_APPLE_PAY_SESSION_V4) $(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_DEVICE_ADAPTATION) $(ENABLE_CSS_IMAGE_ORIENTATION) $(ENABLE_CSS_IMAGE_RESOLUTION) $(ENABLE_CSS_SCROLL_SNAP) $(ENABLE_CSS_SELECTORS_LEVEL4) $(ENABLE_CSS_TRAILING_WORD) $(ENABLE_CURSOR_VISIBILITY) $(ENABLE_CUSTOM_SCHEME_HANDLER) $(ENABLE_DASHBOARD_SUPPORT) $(ENABLE_DATA_INTERACTION) $(ENABLE_DATACUE_VALUE) $(ENABLE_DATALIST_ELEMENT) $(ENABLE_DEVICE_ORIENTATION) $(ENABLE_DRAG_SUPPORT) $(ENABLE_ENCRYPTED_MEDIA) $(ENABLE_EXPERIMENTAL_FEATURES) $(ENABLE_FAST_JIT_PERMISSIONS) $(ENABLE_FILTERS_LEVEL_2) $(ENABLE_FTL_JIT) $(ENABLE_FULLSCREEN_API) $(ENABLE_GAMEPAD) $(ENABLE_GEOLOCATION) $(ENABLE_ICONDATABASE) $(ENABLE_INDEXED_DATABASE) $(ENABLE_INDEXED_DATABASE_IN_WORKERS) $(ENABLE_INPUT_TYPE_COLOR) $(ENABLE_INPUT_TYPE_DATE) $(ENABLE_INPUT_TYPE_DATETIME_INCOMPLETE) $(ENABLE_INPUT_TYPE_DATETIMELOCAL) $(ENABLE_INPUT_TYPE_MONTH) $(ENABLE_INPUT_TYPE_TIME) $(ENABLE_INPUT_TYPE_WEEK) $(ENABLE_INTERSECTION_OBSERVER) $(ENABLE_INTL) $(ENABLE_IOS_GESTURE_EVENTS) $(ENABLE_IOS_TOUCH_EVENTS) $(ENABLE_JIT) $(ENABLE_JS_ASYNC_ITERATION) $(ENABLE_KEYBOARD_CODE_ATTRIBUTE) $(ENABLE_KEYBOARD_KEY_ATTRIBUTE) $(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_METER_ELEMENT) $(ENABLE_MHTML) $(ENABLE_MOUSE_CURSOR_SCALE) $(ENABLE_NAVIGATOR_CONTENT_UTILS) $(ENABLE_NAVIGATOR_STANDALONE) $(ENABLE_NOTIFICATIONS) $(ENABLE_PAYMENT_REQUEST) $(ENABLE_PDFKIT_PLUGIN) $(ENABLE_POINTER_LOCK) $(ENABLE_PUBLIC_SUFFIX_LIST) $(ENABLE_QUOTA) $(ENABLE_REMOTE_INSPECTOR) $(ENABLE_RESOLUTION_MEDIA_QUERY) $(ENABLE_RESOURCE_USAGE) $(ENABLE_RUBBER_BANDING) $(ENABLE_SERVICE_CONTROLS) $(ENABLE_SERVICE_WORKER) $(ENABLE_SPEECH_SYNTHESIS) $(ENABLE_STREAMS_API) $(ENABLE_SUBTLE_CRYPTO) $(ENABLE_SVG_FONTS) $(ENABLE_TELEPHONE_NUMBER_DETECTION) $(ENABLE_TEXT_AUTOSIZING) $(ENABLE_TOUCH_EVENTS) $(ENABLE_USER_MESSAGE_HANDLERS) $(ENABLE_USERSELECT_ALL) $(ENABLE_VARIATION_FONTS) $(ENABLE_VIDEO) $(ENABLE_VIDEO_PRESENTATION_MODE) $(ENABLE_VIDEO_TRACK) $(ENABLE_VIDEO_USES_ELEMENT_FULLSCREEN) $(ENABLE_WEB_AUDIO) $(ENABLE_WEB_AUTHN) $(ENABLE_WEB_RTC) $(ENABLE_WEBASSEMBLY) $(ENABLE_WEBASSEMBLY_STREAMING_API) $(ENABLE_WEBGL) $(ENABLE_WEBGL2) $(ENABLE_WEBMETAL) $(ENABLE_WIRELESS_PLAYBACK_TARGET) $(ENABLE_XSLT);
>+FEATURE_DEFINES = $(ENABLE_3D_TRANSFORMS) $(ENABLE_ACCELERATED_2D_CANVAS) $(ENABLE_ACCELERATED_OVERFLOW_SCROLLING) $(ENABLE_APPLE_PAY) $(ENABLE_APPLE_PAY_SESSION_V3) $(ENABLE_APPLE_PAY_SESSION_V4) $(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_DEVICE_ADAPTATION) $(ENABLE_CSS_IMAGE_ORIENTATION) $(ENABLE_CSS_IMAGE_RESOLUTION) $(ENABLE_CSS_SCROLL_SNAP) $(ENABLE_CSS_SELECTORS_LEVEL4) $(ENABLE_CSS_TRAILING_WORD) $(ENABLE_CURSOR_VISIBILITY) $(ENABLE_CUSTOM_SCHEME_HANDLER) $(ENABLE_DARK_MODE_CSS) $(ENABLE_DASHBOARD_SUPPORT) $(ENABLE_DATA_INTERACTION) $(ENABLE_DATACUE_VALUE) $(ENABLE_DATALIST_ELEMENT) $(ENABLE_DEVICE_ORIENTATION) $(ENABLE_DRAG_SUPPORT) $(ENABLE_ENCRYPTED_MEDIA) $(ENABLE_EXPERIMENTAL_FEATURES) $(ENABLE_FAST_JIT_PERMISSIONS) $(ENABLE_FILTERS_LEVEL_2) $(ENABLE_FTL_JIT) $(ENABLE_FULLSCREEN_API) $(ENABLE_GAMEPAD) $(ENABLE_GEOLOCATION) $(ENABLE_ICONDATABASE) $(ENABLE_INDEXED_DATABASE) $(ENABLE_INDEXED_DATABASE_IN_WORKERS) $(ENABLE_INPUT_TYPE_COLOR) $(ENABLE_INPUT_TYPE_DATE) $(ENABLE_INPUT_TYPE_DATETIME_INCOMPLETE) $(ENABLE_INPUT_TYPE_DATETIMELOCAL) $(ENABLE_INPUT_TYPE_MONTH) $(ENABLE_INPUT_TYPE_TIME) $(ENABLE_INPUT_TYPE_WEEK) $(ENABLE_INTERSECTION_OBSERVER) $(ENABLE_INTL) $(ENABLE_IOS_GESTURE_EVENTS) $(ENABLE_IOS_TOUCH_EVENTS) $(ENABLE_JIT) $(ENABLE_JS_ASYNC_ITERATION) $(ENABLE_KEYBOARD_CODE_ATTRIBUTE) $(ENABLE_KEYBOARD_KEY_ATTRIBUTE) $(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_METER_ELEMENT) $(ENABLE_MHTML) $(ENABLE_MOUSE_CURSOR_SCALE) $(ENABLE_NAVIGATOR_CONTENT_UTILS) $(ENABLE_NAVIGATOR_STANDALONE) $(ENABLE_NOTIFICATIONS) $(ENABLE_PAYMENT_REQUEST) $(ENABLE_PDFKIT_PLUGIN) $(ENABLE_POINTER_LOCK) $(ENABLE_PUBLIC_SUFFIX_LIST) $(ENABLE_QUOTA) $(ENABLE_REMOTE_INSPECTOR) $(ENABLE_RESOLUTION_MEDIA_QUERY) $(ENABLE_RESOURCE_USAGE) $(ENABLE_RUBBER_BANDING) $(ENABLE_SERVICE_CONTROLS) $(ENABLE_SERVICE_WORKER) $(ENABLE_SPEECH_SYNTHESIS) $(ENABLE_STREAMS_API) $(ENABLE_SUBTLE_CRYPTO) $(ENABLE_SVG_FONTS) $(ENABLE_TELEPHONE_NUMBER_DETECTION) $(ENABLE_TEXT_AUTOSIZING) $(ENABLE_TOUCH_EVENTS) $(ENABLE_USER_MESSAGE_HANDLERS) $(ENABLE_USERSELECT_ALL) $(ENABLE_VARIATION_FONTS) $(ENABLE_VIDEO) $(ENABLE_VIDEO_PRESENTATION_MODE) $(ENABLE_VIDEO_TRACK) $(ENABLE_VIDEO_USES_ELEMENT_FULLSCREEN) $(ENABLE_WEB_AUDIO) $(ENABLE_WEB_AUTHN) $(ENABLE_WEB_RTC) $(ENABLE_WEBASSEMBLY) $(ENABLE_WEBASSEMBLY_STREAMING_API) $(ENABLE_WEBGL) $(ENABLE_WEBGL2) $(ENABLE_WEBMETAL) $(ENABLE_WIRELESS_PLAYBACK_TARGET) $(ENABLE_XSLT);
>diff --git a/Source/WebCore/css/CSSValueKeywords.in b/Source/WebCore/css/CSSValueKeywords.in
>index ce0649df3bd090a5aaff249688c5925e805187a6..d133b6d3765ee6b4749f5e9cc7808a4f48e2c64a 100644
>--- a/Source/WebCore/css/CSSValueKeywords.in
>+++ b/Source/WebCore/css/CSSValueKeywords.in
>@@ -1376,6 +1376,13 @@ prefers
> reduce
> no-preference
> 
>+#if defined(ENABLE_DARK_MODE_CSS) && ENABLE_DARK_MODE_CSS
>+// prefers-color-scheme
>+light
>+dark
>+// no-preference
>+#endif
>+
> // auto-repeat
> auto-fill
> auto-fit
>diff --git a/Source/WebCore/css/MediaFeatureNames.h b/Source/WebCore/css/MediaFeatureNames.h
>index 81a66802a914ce0a6035ba24ababea8bb10c6621..6b56455562f68f9b4fb2c59ebff002578eff43fa 100644
>--- a/Source/WebCore/css/MediaFeatureNames.h
>+++ b/Source/WebCore/css/MediaFeatureNames.h
>@@ -29,6 +29,12 @@
> #define CSS_MEDIAQUERY_DISPLAY_MODE(macro)
> #endif
> 
>+#if ENABLE(DARK_MODE_CSS)
>+#define CSS_MEDIAQUERY_PREFERS_COLOR_SCHEME(macro) macro(prefersColorScheme, "prefers-color-scheme")
>+#else
>+#define CSS_MEDIAQUERY_PREFERS_COLOR_SCHEME(macro)
>+#endif
>+
> #define CSS_MEDIAQUERY_NAMES_FOR_EACH_MEDIAFEATURE(macro) \
>     macro(animation, "-webkit-animation") \
>     macro(anyHover, "any-hover") \
>@@ -79,6 +85,7 @@
>     macro(videoPlayableInline, "-webkit-video-playable-inline") \
>     macro(width, "width") \
>     CSS_MEDIAQUERY_DISPLAY_MODE(macro) \
>+    CSS_MEDIAQUERY_PREFERS_COLOR_SCHEME(macro) \
> 
> // end of macro
> 
>diff --git a/Source/WebCore/css/MediaQueryEvaluator.cpp b/Source/WebCore/css/MediaQueryEvaluator.cpp
>index 0fb9e997430c70d9610c3d9fe19c09af9066af81..5e72143d721a5b7edc6fd1dce896fa16955258a9 100644
>--- a/Source/WebCore/css/MediaQueryEvaluator.cpp
>+++ b/Source/WebCore/css/MediaQueryEvaluator.cpp
>@@ -45,6 +45,7 @@
> #include "PlatformScreen.h"
> #include "RenderStyle.h"
> #include "RenderView.h"
>+#include "RuntimeEnabledFeatures.h"
> #include "Settings.h"
> #include "StyleResolver.h"
> #include "Theme.h"
>@@ -712,7 +713,7 @@ static bool anyPointerEvaluate(CSSValue* value, const CSSToLengthConversionData&
> {
>     return pointerEvaluate(value, cssToLengthConversionData, frame, prefix);
> }
>-    
>+
> static bool prefersDarkInterfaceEvaluate(CSSValue* value, const CSSToLengthConversionData&, Frame& frame, MediaFeaturePrefix)
> {
>     bool prefersDarkInterface = false;
>@@ -726,6 +727,30 @@ static bool prefersDarkInterfaceEvaluate(CSSValue* value, const CSSToLengthConve
>     return downcast<CSSPrimitiveValue>(*value).valueID() == (prefersDarkInterface ? CSSValuePrefers : CSSValueNoPreference);
> }
> 
>+#if ENABLE(DARK_MODE_CSS)
>+static bool prefersColorSchemeEvaluate(CSSValue* value, const CSSToLengthConversionData&, Frame& frame, MediaFeaturePrefix)
>+{
>+    ASSERT(RuntimeEnabledFeatures::sharedFeatures().darkModeCSSEnabled());
>+
>+    if (!is<CSSPrimitiveValue>(value))
>+        return false;
>+
>+    auto keyword = downcast<CSSPrimitiveValue>(*value).valueID();
>+    bool useDarkAppearance = frame.page()->useDarkAppearance();
>+
>+    switch (keyword) {
>+    case CSSValueNoPreference:
>+        return true;
>+    case CSSValueDark:
>+        return useDarkAppearance;
>+    case CSSValueLight:
>+        return !useDarkAppearance;
>+    default:
>+        return false;
>+    }
>+}
>+#endif
>+
> static bool prefersReducedMotionEvaluate(CSSValue* value, const CSSToLengthConversionData&, Frame& frame, MediaFeaturePrefix)
> {
>     bool userPrefersReducedMotion = false;
>diff --git a/Source/WebCore/css/MediaQueryExpression.cpp b/Source/WebCore/css/MediaQueryExpression.cpp
>index 617cb6a0cd0239a4f0dafd037b4dc367ada143fa..92087e4d82b8c5aa8f1832f3a03e70dc00175afd 100644
>--- a/Source/WebCore/css/MediaQueryExpression.cpp
>+++ b/Source/WebCore/css/MediaQueryExpression.cpp
>@@ -33,6 +33,7 @@
> #include "CSSPropertyParserHelpers.h"
> #include "MediaFeatureNames.h"
> #include "MediaQueryParserContext.h"
>+#include "RuntimeEnabledFeatures.h"
> #include <wtf/text/TextStream.h>
> #include <wtf/text/StringBuilder.h>
> 
>@@ -52,6 +53,9 @@ static inline bool featureWithValidIdent(const AtomicString& mediaFeature, const
>     || mediaFeature == MediaFeatureNames::pointer
> #if ENABLE(APPLICATION_MANIFEST)
>     || mediaFeature == MediaFeatureNames::displayMode
>+#endif
>+#if ENABLE(DARK_MODE_CSS)
>+    || (mediaFeature == MediaFeatureNames::prefersColorScheme && RuntimeEnabledFeatures::sharedFeatures().darkModeCSSEnabled())
> #endif
>     || mediaFeature == MediaFeatureNames::prefersReducedMotion
>     || (mediaFeature == MediaFeatureNames::prefersDarkInterface && (context.useSystemAppearance || isUASheetBehavior(context.mode)));
>diff --git a/Source/WebCore/page/RuntimeEnabledFeatures.h b/Source/WebCore/page/RuntimeEnabledFeatures.h
>index 120f2e3ff00df9dbc777c6be186f4e51a3b599bd..b7e347d3f6fe276b8eb609f9df27dfe2aba3c804 100644
>--- a/Source/WebCore/page/RuntimeEnabledFeatures.h
>+++ b/Source/WebCore/page/RuntimeEnabledFeatures.h
>@@ -81,6 +81,11 @@ public:
>     void setDirectoryUploadEnabled(bool isEnabled) { m_isDirectoryUploadEnabled = isEnabled; }
>     bool directoryUploadEnabled() const { return m_isDirectoryUploadEnabled; }
> 
>+#if ENABLE(DARK_MODE_CSS)
>+    void setDarkModeCSSEnabled(bool isEnabled) { m_isDarkModeCSSEnabled = isEnabled; }
>+    bool darkModeCSSEnabled() const { return m_isDarkModeCSSEnabled; }
>+#endif
>+
>     void setDataTransferItemsEnabled(bool areEnabled) { m_areDataTransferItemsEnabled = areEnabled; }
>     bool dataTransferItemsEnabled() const { return m_areDataTransferItemsEnabled; }
> 
>@@ -346,6 +351,10 @@ private:
>     bool m_isAttachmentElementEnabled { false };
> #endif
> 
>+#if ENABLE(DARK_MODE_CSS)
>+    bool m_isDarkModeCSSEnabled { false };
>+#endif
>+
> #if ENABLE(INDEXED_DATABASE_IN_WORKERS)
>     bool m_isIndexedDBWorkersEnabled { true };
> #endif
>diff --git a/Source/WebCore/testing/InternalSettings.cpp b/Source/WebCore/testing/InternalSettings.cpp
>index bd1fa311216bc2f0f3401f1ddb0df646af86eb86..e7ce18ba6e2bd9b88d402e1ceb1c21ab34b728e7 100644
>--- a/Source/WebCore/testing/InternalSettings.cpp
>+++ b/Source/WebCore/testing/InternalSettings.cpp
>@@ -286,6 +286,7 @@ void InternalSettings::resetToConsistentState()
>     m_page->setPageScaleFactor(1, { 0, 0 });
>     m_page->mainFrame().setPageAndTextZoomFactors(1, 1);
>     m_page->setCanStartMedia(true);
>+    m_page->setUseDarkAppearance(false);
> 
>     settings().setForcePendingWebGLPolicy(false);
> #if ENABLE(WIRELESS_PLAYBACK_TARGET)
>@@ -526,6 +527,14 @@ ExceptionOr<bool> InternalSettings::shouldDisplayTrackKind(const String& kind)
> #endif
> }
> 
>+ExceptionOr<void> InternalSettings::setUseDarkAppearance(bool useDarkAppearance)
>+{
>+    if (!m_page)
>+        return Exception { InvalidAccessError };
>+    m_page->setUseDarkAppearance(useDarkAppearance);
>+    return { };
>+}
>+
> ExceptionOr<void> InternalSettings::setStorageBlockingPolicy(const String& mode)
> {
>     if (!m_page)
>diff --git a/Source/WebCore/testing/InternalSettings.h b/Source/WebCore/testing/InternalSettings.h
>index 35567f87cfe0454d9f4e6f512c615f7230577b97..6cc7c6074e397c19eb1d81ef65c11807f56cb542 100644
>--- a/Source/WebCore/testing/InternalSettings.h
>+++ b/Source/WebCore/testing/InternalSettings.h
>@@ -72,6 +72,7 @@ public:
>     ExceptionOr<void> setPDFImageCachingPolicy(const String&);
>     ExceptionOr<void> setShouldDisplayTrackKind(const String& kind, bool enabled);
>     ExceptionOr<bool> shouldDisplayTrackKind(const String& kind);
>+    ExceptionOr<void> setUseDarkAppearance(bool);
>     ExceptionOr<void> setStorageBlockingPolicy(const String&);
>     ExceptionOr<void> setImagesEnabled(bool);
>     ExceptionOr<void> setMinimumTimerInterval(double intervalInSeconds);
>diff --git a/Source/WebCore/testing/InternalSettings.idl b/Source/WebCore/testing/InternalSettings.idl
>index 51eb2460510d6c2a02bcbbb31625a2cfbcfeed04..bbd8165ebe937c426ee0b96a28360fd3748a316d 100644
>--- a/Source/WebCore/testing/InternalSettings.idl
>+++ b/Source/WebCore/testing/InternalSettings.idl
>@@ -71,6 +71,7 @@ enum FontLoadTimingOverride { "Block", "Swap", "Failure" };
>     [MayThrowException] void setPreferMIMETypeForImages(boolean preferMimeTypeForImage);
> 
>     // Other switches
>+    [MayThrowException] void setUseDarkAppearance(boolean enabled);
>     [MayThrowException] void setStorageBlockingPolicy(DOMString policy);
>     [MayThrowException] void setImagesEnabled(boolean enabled);
>     [MayThrowException] void setPDFImageCachingPolicy(DOMString policy);
>diff --git a/Source/WebKit/Configurations/FeatureDefines.xcconfig b/Source/WebKit/Configurations/FeatureDefines.xcconfig
>index 689ed00bdb0f5e59abefa77265c0d4f2a249733b..78c7ec233c02487088f4ac09d3dee2e4ca248807 100644
>--- a/Source/WebKit/Configurations/FeatureDefines.xcconfig
>+++ b/Source/WebKit/Configurations/FeatureDefines.xcconfig
>@@ -96,6 +96,10 @@ ENABLE_CURSOR_VISIBILITY = ENABLE_CURSOR_VISIBILITY;
> 
> ENABLE_CUSTOM_SCHEME_HANDLER = ;
> 
>+ENABLE_DARK_MODE_CSS = $(ENABLE_DARK_MODE_CSS_$(WK_PLATFORM_NAME));
>+ENABLE_DARK_MODE_CSS_macosx = $(ENABLE_DARK_MODE_CSS$(WK_MACOS_1014));
>+ENABLE_DARK_MODE_CSS_MACOS_SINCE_1014 = ENABLE_DARK_MODE_CSS;
>+
> ENABLE_DASHBOARD_SUPPORT = $(ENABLE_DASHBOARD_SUPPORT_$(WK_PLATFORM_NAME));
> ENABLE_DASHBOARD_SUPPORT_macosx = ENABLE_DASHBOARD_SUPPORT;
> 
>@@ -372,4 +376,4 @@ ENABLE_WIRELESS_PLAYBACK_TARGET = ENABLE_WIRELESS_PLAYBACK_TARGET;
> 
> ENABLE_XSLT = ENABLE_XSLT;
> 
>-FEATURE_DEFINES = $(ENABLE_3D_TRANSFORMS) $(ENABLE_ACCELERATED_2D_CANVAS) $(ENABLE_ACCELERATED_OVERFLOW_SCROLLING) $(ENABLE_APPLE_PAY) $(ENABLE_APPLE_PAY_SESSION_V3) $(ENABLE_APPLE_PAY_SESSION_V4) $(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_DEVICE_ADAPTATION) $(ENABLE_CSS_IMAGE_ORIENTATION) $(ENABLE_CSS_IMAGE_RESOLUTION) $(ENABLE_CSS_SCROLL_SNAP) $(ENABLE_CSS_SELECTORS_LEVEL4) $(ENABLE_CSS_TRAILING_WORD) $(ENABLE_CURSOR_VISIBILITY) $(ENABLE_CUSTOM_SCHEME_HANDLER) $(ENABLE_DASHBOARD_SUPPORT) $(ENABLE_DATA_INTERACTION) $(ENABLE_DATACUE_VALUE) $(ENABLE_DATALIST_ELEMENT) $(ENABLE_DEVICE_ORIENTATION) $(ENABLE_DRAG_SUPPORT) $(ENABLE_ENCRYPTED_MEDIA) $(ENABLE_EXPERIMENTAL_FEATURES) $(ENABLE_FAST_JIT_PERMISSIONS) $(ENABLE_FILTERS_LEVEL_2) $(ENABLE_FTL_JIT) $(ENABLE_FULLSCREEN_API) $(ENABLE_GAMEPAD) $(ENABLE_GEOLOCATION) $(ENABLE_ICONDATABASE) $(ENABLE_INDEXED_DATABASE) $(ENABLE_INDEXED_DATABASE_IN_WORKERS) $(ENABLE_INPUT_TYPE_COLOR) $(ENABLE_INPUT_TYPE_DATE) $(ENABLE_INPUT_TYPE_DATETIME_INCOMPLETE) $(ENABLE_INPUT_TYPE_DATETIMELOCAL) $(ENABLE_INPUT_TYPE_MONTH) $(ENABLE_INPUT_TYPE_TIME) $(ENABLE_INPUT_TYPE_WEEK) $(ENABLE_INTERSECTION_OBSERVER) $(ENABLE_INTL) $(ENABLE_IOS_GESTURE_EVENTS) $(ENABLE_IOS_TOUCH_EVENTS) $(ENABLE_JIT) $(ENABLE_JS_ASYNC_ITERATION) $(ENABLE_KEYBOARD_CODE_ATTRIBUTE) $(ENABLE_KEYBOARD_KEY_ATTRIBUTE) $(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_METER_ELEMENT) $(ENABLE_MHTML) $(ENABLE_MOUSE_CURSOR_SCALE) $(ENABLE_NAVIGATOR_CONTENT_UTILS) $(ENABLE_NAVIGATOR_STANDALONE) $(ENABLE_NOTIFICATIONS) $(ENABLE_PAYMENT_REQUEST) $(ENABLE_PDFKIT_PLUGIN) $(ENABLE_POINTER_LOCK) $(ENABLE_PUBLIC_SUFFIX_LIST) $(ENABLE_QUOTA) $(ENABLE_REMOTE_INSPECTOR) $(ENABLE_RESOLUTION_MEDIA_QUERY) $(ENABLE_RESOURCE_USAGE) $(ENABLE_RUBBER_BANDING) $(ENABLE_SERVICE_CONTROLS) $(ENABLE_SERVICE_WORKER) $(ENABLE_SPEECH_SYNTHESIS) $(ENABLE_STREAMS_API) $(ENABLE_SUBTLE_CRYPTO) $(ENABLE_SVG_FONTS) $(ENABLE_TELEPHONE_NUMBER_DETECTION) $(ENABLE_TEXT_AUTOSIZING) $(ENABLE_TOUCH_EVENTS) $(ENABLE_USER_MESSAGE_HANDLERS) $(ENABLE_USERSELECT_ALL) $(ENABLE_VARIATION_FONTS) $(ENABLE_VIDEO) $(ENABLE_VIDEO_PRESENTATION_MODE) $(ENABLE_VIDEO_TRACK) $(ENABLE_VIDEO_USES_ELEMENT_FULLSCREEN) $(ENABLE_WEB_AUDIO) $(ENABLE_WEB_AUTHN) $(ENABLE_WEB_RTC) $(ENABLE_WEBASSEMBLY) $(ENABLE_WEBASSEMBLY_STREAMING_API) $(ENABLE_WEBGL) $(ENABLE_WEBGL2) $(ENABLE_WEBMETAL) $(ENABLE_WIRELESS_PLAYBACK_TARGET) $(ENABLE_XSLT);
>+FEATURE_DEFINES = $(ENABLE_3D_TRANSFORMS) $(ENABLE_ACCELERATED_2D_CANVAS) $(ENABLE_ACCELERATED_OVERFLOW_SCROLLING) $(ENABLE_APPLE_PAY) $(ENABLE_APPLE_PAY_SESSION_V3) $(ENABLE_APPLE_PAY_SESSION_V4) $(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_DEVICE_ADAPTATION) $(ENABLE_CSS_IMAGE_ORIENTATION) $(ENABLE_CSS_IMAGE_RESOLUTION) $(ENABLE_CSS_SCROLL_SNAP) $(ENABLE_CSS_SELECTORS_LEVEL4) $(ENABLE_CSS_TRAILING_WORD) $(ENABLE_CURSOR_VISIBILITY) $(ENABLE_CUSTOM_SCHEME_HANDLER) $(ENABLE_DARK_MODE_CSS) $(ENABLE_DASHBOARD_SUPPORT) $(ENABLE_DATA_INTERACTION) $(ENABLE_DATACUE_VALUE) $(ENABLE_DATALIST_ELEMENT) $(ENABLE_DEVICE_ORIENTATION) $(ENABLE_DRAG_SUPPORT) $(ENABLE_ENCRYPTED_MEDIA) $(ENABLE_EXPERIMENTAL_FEATURES) $(ENABLE_FAST_JIT_PERMISSIONS) $(ENABLE_FILTERS_LEVEL_2) $(ENABLE_FTL_JIT) $(ENABLE_FULLSCREEN_API) $(ENABLE_GAMEPAD) $(ENABLE_GEOLOCATION) $(ENABLE_ICONDATABASE) $(ENABLE_INDEXED_DATABASE) $(ENABLE_INDEXED_DATABASE_IN_WORKERS) $(ENABLE_INPUT_TYPE_COLOR) $(ENABLE_INPUT_TYPE_DATE) $(ENABLE_INPUT_TYPE_DATETIME_INCOMPLETE) $(ENABLE_INPUT_TYPE_DATETIMELOCAL) $(ENABLE_INPUT_TYPE_MONTH) $(ENABLE_INPUT_TYPE_TIME) $(ENABLE_INPUT_TYPE_WEEK) $(ENABLE_INTERSECTION_OBSERVER) $(ENABLE_INTL) $(ENABLE_IOS_GESTURE_EVENTS) $(ENABLE_IOS_TOUCH_EVENTS) $(ENABLE_JIT) $(ENABLE_JS_ASYNC_ITERATION) $(ENABLE_KEYBOARD_CODE_ATTRIBUTE) $(ENABLE_KEYBOARD_KEY_ATTRIBUTE) $(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_METER_ELEMENT) $(ENABLE_MHTML) $(ENABLE_MOUSE_CURSOR_SCALE) $(ENABLE_NAVIGATOR_CONTENT_UTILS) $(ENABLE_NAVIGATOR_STANDALONE) $(ENABLE_NOTIFICATIONS) $(ENABLE_PAYMENT_REQUEST) $(ENABLE_PDFKIT_PLUGIN) $(ENABLE_POINTER_LOCK) $(ENABLE_PUBLIC_SUFFIX_LIST) $(ENABLE_QUOTA) $(ENABLE_REMOTE_INSPECTOR) $(ENABLE_RESOLUTION_MEDIA_QUERY) $(ENABLE_RESOURCE_USAGE) $(ENABLE_RUBBER_BANDING) $(ENABLE_SERVICE_CONTROLS) $(ENABLE_SERVICE_WORKER) $(ENABLE_SPEECH_SYNTHESIS) $(ENABLE_STREAMS_API) $(ENABLE_SUBTLE_CRYPTO) $(ENABLE_SVG_FONTS) $(ENABLE_TELEPHONE_NUMBER_DETECTION) $(ENABLE_TEXT_AUTOSIZING) $(ENABLE_TOUCH_EVENTS) $(ENABLE_USER_MESSAGE_HANDLERS) $(ENABLE_USERSELECT_ALL) $(ENABLE_VARIATION_FONTS) $(ENABLE_VIDEO) $(ENABLE_VIDEO_PRESENTATION_MODE) $(ENABLE_VIDEO_TRACK) $(ENABLE_VIDEO_USES_ELEMENT_FULLSCREEN) $(ENABLE_WEB_AUDIO) $(ENABLE_WEB_AUTHN) $(ENABLE_WEB_RTC) $(ENABLE_WEBASSEMBLY) $(ENABLE_WEBASSEMBLY_STREAMING_API) $(ENABLE_WEBGL) $(ENABLE_WEBGL2) $(ENABLE_WEBMETAL) $(ENABLE_WIRELESS_PLAYBACK_TARGET) $(ENABLE_XSLT);
>diff --git a/Source/WebKit/Shared/WebPreferences.yaml b/Source/WebKit/Shared/WebPreferences.yaml
>index 756498b31b4c4a6c09530f7d6f757ef1f10de539..0201787ecff4200dbd27e19093c2f1425a6a62bf 100644
>--- a/Source/WebKit/Shared/WebPreferences.yaml
>+++ b/Source/WebKit/Shared/WebPreferences.yaml
>@@ -1281,6 +1281,15 @@ CSSCustomPropertiesAndValuesEnabled:
>   webcoreBinding: RuntimeEnabledFeatures
>   category: experimental
> 
>+DarkModeCSSEnabled:
>+  type: bool
>+  defaultValue: DEFAULT_EXPERIMENTAL_FEATURES_ENABLED
>+  humanReadableName: "Dark Mode CSS Support"
>+  humanReadableDescription: "Enable Dark Mode CSS Support"
>+  webcoreBinding: RuntimeEnabledFeatures
>+  category: experimental
>+  condition: ENABLE(DARK_MODE_CSS)
>+
> # 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 689ed00bdb0f5e59abefa77265c0d4f2a249733b..78c7ec233c02487088f4ac09d3dee2e4ca248807 100644
>--- a/Source/WebKitLegacy/mac/Configurations/FeatureDefines.xcconfig
>+++ b/Source/WebKitLegacy/mac/Configurations/FeatureDefines.xcconfig
>@@ -96,6 +96,10 @@ ENABLE_CURSOR_VISIBILITY = ENABLE_CURSOR_VISIBILITY;
> 
> ENABLE_CUSTOM_SCHEME_HANDLER = ;
> 
>+ENABLE_DARK_MODE_CSS = $(ENABLE_DARK_MODE_CSS_$(WK_PLATFORM_NAME));
>+ENABLE_DARK_MODE_CSS_macosx = $(ENABLE_DARK_MODE_CSS$(WK_MACOS_1014));
>+ENABLE_DARK_MODE_CSS_MACOS_SINCE_1014 = ENABLE_DARK_MODE_CSS;
>+
> ENABLE_DASHBOARD_SUPPORT = $(ENABLE_DASHBOARD_SUPPORT_$(WK_PLATFORM_NAME));
> ENABLE_DASHBOARD_SUPPORT_macosx = ENABLE_DASHBOARD_SUPPORT;
> 
>@@ -372,4 +376,4 @@ ENABLE_WIRELESS_PLAYBACK_TARGET = ENABLE_WIRELESS_PLAYBACK_TARGET;
> 
> ENABLE_XSLT = ENABLE_XSLT;
> 
>-FEATURE_DEFINES = $(ENABLE_3D_TRANSFORMS) $(ENABLE_ACCELERATED_2D_CANVAS) $(ENABLE_ACCELERATED_OVERFLOW_SCROLLING) $(ENABLE_APPLE_PAY) $(ENABLE_APPLE_PAY_SESSION_V3) $(ENABLE_APPLE_PAY_SESSION_V4) $(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_DEVICE_ADAPTATION) $(ENABLE_CSS_IMAGE_ORIENTATION) $(ENABLE_CSS_IMAGE_RESOLUTION) $(ENABLE_CSS_SCROLL_SNAP) $(ENABLE_CSS_SELECTORS_LEVEL4) $(ENABLE_CSS_TRAILING_WORD) $(ENABLE_CURSOR_VISIBILITY) $(ENABLE_CUSTOM_SCHEME_HANDLER) $(ENABLE_DASHBOARD_SUPPORT) $(ENABLE_DATA_INTERACTION) $(ENABLE_DATACUE_VALUE) $(ENABLE_DATALIST_ELEMENT) $(ENABLE_DEVICE_ORIENTATION) $(ENABLE_DRAG_SUPPORT) $(ENABLE_ENCRYPTED_MEDIA) $(ENABLE_EXPERIMENTAL_FEATURES) $(ENABLE_FAST_JIT_PERMISSIONS) $(ENABLE_FILTERS_LEVEL_2) $(ENABLE_FTL_JIT) $(ENABLE_FULLSCREEN_API) $(ENABLE_GAMEPAD) $(ENABLE_GEOLOCATION) $(ENABLE_ICONDATABASE) $(ENABLE_INDEXED_DATABASE) $(ENABLE_INDEXED_DATABASE_IN_WORKERS) $(ENABLE_INPUT_TYPE_COLOR) $(ENABLE_INPUT_TYPE_DATE) $(ENABLE_INPUT_TYPE_DATETIME_INCOMPLETE) $(ENABLE_INPUT_TYPE_DATETIMELOCAL) $(ENABLE_INPUT_TYPE_MONTH) $(ENABLE_INPUT_TYPE_TIME) $(ENABLE_INPUT_TYPE_WEEK) $(ENABLE_INTERSECTION_OBSERVER) $(ENABLE_INTL) $(ENABLE_IOS_GESTURE_EVENTS) $(ENABLE_IOS_TOUCH_EVENTS) $(ENABLE_JIT) $(ENABLE_JS_ASYNC_ITERATION) $(ENABLE_KEYBOARD_CODE_ATTRIBUTE) $(ENABLE_KEYBOARD_KEY_ATTRIBUTE) $(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_METER_ELEMENT) $(ENABLE_MHTML) $(ENABLE_MOUSE_CURSOR_SCALE) $(ENABLE_NAVIGATOR_CONTENT_UTILS) $(ENABLE_NAVIGATOR_STANDALONE) $(ENABLE_NOTIFICATIONS) $(ENABLE_PAYMENT_REQUEST) $(ENABLE_PDFKIT_PLUGIN) $(ENABLE_POINTER_LOCK) $(ENABLE_PUBLIC_SUFFIX_LIST) $(ENABLE_QUOTA) $(ENABLE_REMOTE_INSPECTOR) $(ENABLE_RESOLUTION_MEDIA_QUERY) $(ENABLE_RESOURCE_USAGE) $(ENABLE_RUBBER_BANDING) $(ENABLE_SERVICE_CONTROLS) $(ENABLE_SERVICE_WORKER) $(ENABLE_SPEECH_SYNTHESIS) $(ENABLE_STREAMS_API) $(ENABLE_SUBTLE_CRYPTO) $(ENABLE_SVG_FONTS) $(ENABLE_TELEPHONE_NUMBER_DETECTION) $(ENABLE_TEXT_AUTOSIZING) $(ENABLE_TOUCH_EVENTS) $(ENABLE_USER_MESSAGE_HANDLERS) $(ENABLE_USERSELECT_ALL) $(ENABLE_VARIATION_FONTS) $(ENABLE_VIDEO) $(ENABLE_VIDEO_PRESENTATION_MODE) $(ENABLE_VIDEO_TRACK) $(ENABLE_VIDEO_USES_ELEMENT_FULLSCREEN) $(ENABLE_WEB_AUDIO) $(ENABLE_WEB_AUTHN) $(ENABLE_WEB_RTC) $(ENABLE_WEBASSEMBLY) $(ENABLE_WEBASSEMBLY_STREAMING_API) $(ENABLE_WEBGL) $(ENABLE_WEBGL2) $(ENABLE_WEBMETAL) $(ENABLE_WIRELESS_PLAYBACK_TARGET) $(ENABLE_XSLT);
>+FEATURE_DEFINES = $(ENABLE_3D_TRANSFORMS) $(ENABLE_ACCELERATED_2D_CANVAS) $(ENABLE_ACCELERATED_OVERFLOW_SCROLLING) $(ENABLE_APPLE_PAY) $(ENABLE_APPLE_PAY_SESSION_V3) $(ENABLE_APPLE_PAY_SESSION_V4) $(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_DEVICE_ADAPTATION) $(ENABLE_CSS_IMAGE_ORIENTATION) $(ENABLE_CSS_IMAGE_RESOLUTION) $(ENABLE_CSS_SCROLL_SNAP) $(ENABLE_CSS_SELECTORS_LEVEL4) $(ENABLE_CSS_TRAILING_WORD) $(ENABLE_CURSOR_VISIBILITY) $(ENABLE_CUSTOM_SCHEME_HANDLER) $(ENABLE_DARK_MODE_CSS) $(ENABLE_DASHBOARD_SUPPORT) $(ENABLE_DATA_INTERACTION) $(ENABLE_DATACUE_VALUE) $(ENABLE_DATALIST_ELEMENT) $(ENABLE_DEVICE_ORIENTATION) $(ENABLE_DRAG_SUPPORT) $(ENABLE_ENCRYPTED_MEDIA) $(ENABLE_EXPERIMENTAL_FEATURES) $(ENABLE_FAST_JIT_PERMISSIONS) $(ENABLE_FILTERS_LEVEL_2) $(ENABLE_FTL_JIT) $(ENABLE_FULLSCREEN_API) $(ENABLE_GAMEPAD) $(ENABLE_GEOLOCATION) $(ENABLE_ICONDATABASE) $(ENABLE_INDEXED_DATABASE) $(ENABLE_INDEXED_DATABASE_IN_WORKERS) $(ENABLE_INPUT_TYPE_COLOR) $(ENABLE_INPUT_TYPE_DATE) $(ENABLE_INPUT_TYPE_DATETIME_INCOMPLETE) $(ENABLE_INPUT_TYPE_DATETIMELOCAL) $(ENABLE_INPUT_TYPE_MONTH) $(ENABLE_INPUT_TYPE_TIME) $(ENABLE_INPUT_TYPE_WEEK) $(ENABLE_INTERSECTION_OBSERVER) $(ENABLE_INTL) $(ENABLE_IOS_GESTURE_EVENTS) $(ENABLE_IOS_TOUCH_EVENTS) $(ENABLE_JIT) $(ENABLE_JS_ASYNC_ITERATION) $(ENABLE_KEYBOARD_CODE_ATTRIBUTE) $(ENABLE_KEYBOARD_KEY_ATTRIBUTE) $(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_METER_ELEMENT) $(ENABLE_MHTML) $(ENABLE_MOUSE_CURSOR_SCALE) $(ENABLE_NAVIGATOR_CONTENT_UTILS) $(ENABLE_NAVIGATOR_STANDALONE) $(ENABLE_NOTIFICATIONS) $(ENABLE_PAYMENT_REQUEST) $(ENABLE_PDFKIT_PLUGIN) $(ENABLE_POINTER_LOCK) $(ENABLE_PUBLIC_SUFFIX_LIST) $(ENABLE_QUOTA) $(ENABLE_REMOTE_INSPECTOR) $(ENABLE_RESOLUTION_MEDIA_QUERY) $(ENABLE_RESOURCE_USAGE) $(ENABLE_RUBBER_BANDING) $(ENABLE_SERVICE_CONTROLS) $(ENABLE_SERVICE_WORKER) $(ENABLE_SPEECH_SYNTHESIS) $(ENABLE_STREAMS_API) $(ENABLE_SUBTLE_CRYPTO) $(ENABLE_SVG_FONTS) $(ENABLE_TELEPHONE_NUMBER_DETECTION) $(ENABLE_TEXT_AUTOSIZING) $(ENABLE_TOUCH_EVENTS) $(ENABLE_USER_MESSAGE_HANDLERS) $(ENABLE_USERSELECT_ALL) $(ENABLE_VARIATION_FONTS) $(ENABLE_VIDEO) $(ENABLE_VIDEO_PRESENTATION_MODE) $(ENABLE_VIDEO_TRACK) $(ENABLE_VIDEO_USES_ELEMENT_FULLSCREEN) $(ENABLE_WEB_AUDIO) $(ENABLE_WEB_AUTHN) $(ENABLE_WEB_RTC) $(ENABLE_WEBASSEMBLY) $(ENABLE_WEBASSEMBLY_STREAMING_API) $(ENABLE_WEBGL) $(ENABLE_WEBGL2) $(ENABLE_WEBMETAL) $(ENABLE_WIRELESS_PLAYBACK_TARGET) $(ENABLE_XSLT);
>diff --git a/Source/cmake/tools/vsprops/FeatureDefines.props b/Source/cmake/tools/vsprops/FeatureDefines.props
>index 4d42faa9b553eda66fecd06dd1c9cf312ceef149..a53ee89220c3723f0e6cc26e0c1137b1e818b474 100644
>--- a/Source/cmake/tools/vsprops/FeatureDefines.props
>+++ b/Source/cmake/tools/vsprops/FeatureDefines.props
>@@ -1,4 +1,4 @@
>-ï»¿<?xml version="1.0" encoding="utf-8"?>
>+<?xml version="1.0" encoding="utf-8"?>
> <Project DefaultTargets="Build" ToolsVersion="4.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
>   <PropertyGroup Label="UserMacros">
>     <ENABLE_3D_TRANSFORMS>ENABLE_3D_TRANSFORMS</ENABLE_3D_TRANSFORMS>
>@@ -17,6 +17,7 @@
>     <ENABLE_CSS_TRANSFORMS_ANIMATIONS_TRANSITIONS_UNPREFIXED>ENABLE_CSS_TRANSFORMS_ANIMATIONS_TRANSITIONS_UNPREFIXED</ENABLE_CSS_TRANSFORMS_ANIMATIONS_TRANSITIONS_UNPREFIXED>
>     <ENABLE_CURSOR_VISIBILITY>ENABLE_CURSOR_VISIBILITY</ENABLE_CURSOR_VISIBILITY>
>     <ENABLE_CUSTOM_SCHEME_HANDLER />
>+    <ENABLE_DARK_MODE_CSS />
>     <ENABLE_DATAGRID />
>     <ENABLE_DATALIST_ELEMENT />
>     <ENABLE_DEVICE_ORIENTATION />
>@@ -76,7 +77,7 @@
>   </PropertyGroup>
>   <ItemDefinitionGroup>
>     <ClCompile>
>-      <PreprocessorDefinitions>$(ENABLE_3D_TRANSFORMS);$(ENABLE_ACCELERATED_2D_CANVAS);$(ENABLE_ACCELERATED_OVERFLOW_SCROLLING);$(ENABLE_ATTACHMENT_ELEMENT);$(ENABLE_CHANNEL_MESSAGING);$(ENABLE_CSS3_CONDITIONAL_RULES);$(ENABLE_CSS_IMAGE_SET);$(ENABLE_CSS3_TEXT);$(ENABLE_CSS_BOX_DECORATION_BREAK);$(ENABLE_CSS_SHADERS);$(ENABLE_CSS_COMPOSITING);$(ENABLE_CSS_SELECTORS_LEVEL4);$(ENABLE_CSS_SHAPE_INSIDE);$(ENABLE_CSS_TRANSFORMS_ANIMATIONS_TRANSITIONS_UNPREFIXED);$(ENABLE_CURSOR_VISIBILITY);$(ENABLE_CUSTOM_SCHEME_HANDLER);$(ENABLE_DATAGRID);$(ENABLE_DATALIST_ELEMENT);$(ENABLE_DEVICE_ORIENTATION);$(ENABLE_DIRECTORY_UPLOAD);$(ENABLE_ENCRYPTED_MEDIA);$(ENABLE_FETCH_API);$(ENABLE_FILE_SYSTEM);$(ENABLE_FULLSCREEN_API);$(ENABLE_GAMEPAD);$(ENABLE_GEOLOCATION);$(ENABLE_HIGH_DPI_CANVAS);$(ENABLE_ICONDATABASE);$(ENABLE_INDEXED_DATABASE);$(ENABLE_INPUT_TYPE_COLOR);$(ENABLE_INPUT_SPEECH);$(ENABLE_INPUT_TYPE_DATE);$(ENABLE_INPUT_TYPE_DATETIME_INCOMPLETE);$(ENABLE_INPUT_TYPE_DATETIMELOCAL);$(ENABLE_INPUT_TYPE_MONTH);$(ENABLE_INPUT_TYPE_TIME);$(ENABLE_INPUT_TYPE_WEEK);$(ENABLE_INTL);$(ENABLE_LEGACY_CSS_VENDOR_PREFIXES);$(ENABLE_LEGACY_ENCRYPTED_MEDIA);$(ENABLE_LINK_PRERENDER);$(ENABLE_MATHML);$(ENABLE_METER_ELEMENT);$(ENABLE_MICRODATA);$(ENABLE_MOUSE_CURSOR_SCALE);$(ENABLE_NOTIFICATIONS);$(ENABLE_QUOTA);$(ENABLE_NAVIGATOR_CONTENT_UTILS);$(ENABLE_STREAMS_API);$(ENABLE_SCRIPTED_SPEECH);$(ENABLE_SHARED_WORKERS);$(ENABLE_MEDIA_CONTROLS_SCRIPT);$(ENABLE_MEDIA_SOURCE);$(ENABLE_MEDIA_STATISTICS);$(ENABLE_SQL_DATABASE);$(ENABLE_STYLE_SCOPED);$(ENABLE_SUBPIXEL_LAYOUT);$(ENABLE_SVG_DOM_OBJC_BINDINGS);$(ENABLE_SVG_FONTS);$(ENABLE_VIDEO);$(ENABLE_VIDEO_TRACK);$(ENABLE_WEB_AUDIO);$(ENABLE_WEBGL);$(ENABLE_WEBGPU);$(ENABLE_WEBVTT_REGIONS);$(ENABLE_XHR_TIMEOUT);$(ENABLE_XSLT);%(PreprocessorDefinitions)</PreprocessorDefinitions>
>+      <PreprocessorDefinitions>$(ENABLE_3D_TRANSFORMS);$(ENABLE_ACCELERATED_2D_CANVAS);$(ENABLE_ACCELERATED_OVERFLOW_SCROLLING);$(ENABLE_ATTACHMENT_ELEMENT);$(ENABLE_CHANNEL_MESSAGING);$(ENABLE_CSS3_CONDITIONAL_RULES);$(ENABLE_CSS_IMAGE_SET);$(ENABLE_CSS3_TEXT);$(ENABLE_CSS_BOX_DECORATION_BREAK);$(ENABLE_CSS_SHADERS);$(ENABLE_CSS_COMPOSITING);$(ENABLE_CSS_SELECTORS_LEVEL4);$(ENABLE_CSS_SHAPE_INSIDE);$(ENABLE_CSS_TRANSFORMS_ANIMATIONS_TRANSITIONS_UNPREFIXED);$(ENABLE_CURSOR_VISIBILITY);$(ENABLE_CUSTOM_SCHEME_HANDLER);$(ENABLE_DARK_MODE_CSS);$(ENABLE_DATAGRID);$(ENABLE_DATALIST_ELEMENT);$(ENABLE_DEVICE_ORIENTATION);$(ENABLE_DIRECTORY_UPLOAD);$(ENABLE_ENCRYPTED_MEDIA);$(ENABLE_FETCH_API);$(ENABLE_FILE_SYSTEM);$(ENABLE_FULLSCREEN_API);$(ENABLE_GAMEPAD);$(ENABLE_GEOLOCATION);$(ENABLE_HIGH_DPI_CANVAS);$(ENABLE_ICONDATABASE);$(ENABLE_INDEXED_DATABASE);$(ENABLE_INPUT_TYPE_COLOR);$(ENABLE_INPUT_SPEECH);$(ENABLE_INPUT_TYPE_DATE);$(ENABLE_INPUT_TYPE_DATETIME_INCOMPLETE);$(ENABLE_INPUT_TYPE_DATETIMELOCAL);$(ENABLE_INPUT_TYPE_MONTH);$(ENABLE_INPUT_TYPE_TIME);$(ENABLE_INPUT_TYPE_WEEK);$(ENABLE_INTL);$(ENABLE_LEGACY_CSS_VENDOR_PREFIXES);$(ENABLE_LEGACY_ENCRYPTED_MEDIA);$(ENABLE_LINK_PRERENDER);$(ENABLE_MATHML);$(ENABLE_METER_ELEMENT);$(ENABLE_MICRODATA);$(ENABLE_MOUSE_CURSOR_SCALE);$(ENABLE_NOTIFICATIONS);$(ENABLE_QUOTA);$(ENABLE_NAVIGATOR_CONTENT_UTILS);$(ENABLE_STREAMS_API);$(ENABLE_SCRIPTED_SPEECH);$(ENABLE_SHARED_WORKERS);$(ENABLE_MEDIA_CONTROLS_SCRIPT);$(ENABLE_MEDIA_SOURCE);$(ENABLE_MEDIA_STATISTICS);$(ENABLE_SQL_DATABASE);$(ENABLE_STYLE_SCOPED);$(ENABLE_SUBPIXEL_LAYOUT);$(ENABLE_SVG_DOM_OBJC_BINDINGS);$(ENABLE_SVG_FONTS);$(ENABLE_VIDEO);$(ENABLE_VIDEO_TRACK);$(ENABLE_WEB_AUDIO);$(ENABLE_WEBGL);$(ENABLE_WEBGPU);$(ENABLE_WEBVTT_REGIONS);$(ENABLE_XHR_TIMEOUT);$(ENABLE_XSLT);%(PreprocessorDefinitions)</PreprocessorDefinitions>
>     </ClCompile>
>   </ItemDefinitionGroup>
>   <ItemGroup>
>@@ -144,6 +145,10 @@
>       <Value>$(ENABLE_CUSTOM_SCHEME_HANDLER)</Value>
>       <EnvironmentVariable>true</EnvironmentVariable>
>     </BuildMacro>
>+    <BuildMacro Include="ENABLE_DARK_MODE_CSS">
>+      <Value>$(ENABLE_DARK_MODE_CSS)</Value>
>+      <EnvironmentVariable>true</EnvironmentVariable>
>+    </BuildMacro>
>     <BuildMacro Include="ENABLE_DATAGRID">
>       <Value>$(ENABLE_DATAGRID)</Value>
>       <EnvironmentVariable>true</EnvironmentVariable>
>diff --git a/Source/cmake/tools/vsprops/FeatureDefinesCairo.props b/Source/cmake/tools/vsprops/FeatureDefinesCairo.props
>index 113aade5c8f864cf7a807e97a105fd233b79a90f..e350159da523bca7040adf296d9d20e07880171b 100644
>--- a/Source/cmake/tools/vsprops/FeatureDefinesCairo.props
>+++ b/Source/cmake/tools/vsprops/FeatureDefinesCairo.props
>@@ -1,4 +1,4 @@
>-ï»¿<?xml version="1.0" encoding="utf-8"?>
>+<?xml version="1.0" encoding="utf-8"?>
> <Project DefaultTargets="Build" ToolsVersion="4.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
>   <PropertyGroup Label="UserMacros">
>     <ENABLE_3D_TRANSFORMS>ENABLE_3D_TRANSFORMS</ENABLE_3D_TRANSFORMS>
>@@ -17,6 +17,7 @@
>     <ENABLE_CSS_TRANSFORMS_ANIMATIONS_TRANSITIONS_UNPREFIXED>ENABLE_CSS_TRANSFORMS_ANIMATIONS_TRANSITIONS_UNPREFIXED</ENABLE_CSS_TRANSFORMS_ANIMATIONS_TRANSITIONS_UNPREFIXED>
>     <ENABLE_CURSOR_VISIBILITY>ENABLE_CURSOR_VISIBILITY</ENABLE_CURSOR_VISIBILITY>
>     <ENABLE_CUSTOM_SCHEME_HANDLER />
>+    <ENABLE_DARK_MODE_CSS />
>     <ENABLE_DATAGRID />
>     <ENABLE_DATALIST_ELEMENT />
>     <ENABLE_DEVICE_ORIENTATION />
>@@ -75,7 +76,7 @@
>   </PropertyGroup>
>   <ItemDefinitionGroup>
>     <ClCompile>
>-      <PreprocessorDefinitions>$(ENABLE_3D_TRANSFORMS);$(ENABLE_ACCELERATED_2D_CANVAS);$(ENABLE_ACCELERATED_OVERFLOW_SCROLLING);$(ENABLE_ATTACHMENT_ELEMENT);$(ENABLE_CHANNEL_MESSAGING);$(ENABLE_CSS3_CONDITIONAL_RULES);$(ENABLE_CSS_IMAGE_SET);$(ENABLE_CSS3_TEXT);$(ENABLE_CSS_BOX_DECORATION_BREAK);$(ENABLE_CSS_SHADERS);$(ENABLE_CSS_COMPOSITING);$(ENABLE_CSS_SELECTORS_LEVEL4);$(ENABLE_CSS_SHAPE_INSIDE);$(ENABLE_CSS_TRANSFORMS_ANIMATIONS_TRANSITIONS_UNPREFIXED);$(ENABLE_CURSOR_VISIBILITY);$(ENABLE_CUSTOM_SCHEME_HANDLER);$(ENABLE_DATAGRID);$(ENABLE_DATALIST_ELEMENT);$(ENABLE_DEVICE_ORIENTATION);$(ENABLE_DIRECTORY_UPLOAD);$(ENABLE_ENCRYPTED_MEDIA);$(ENABLE_FETCH_API);$(ENABLE_FILE_SYSTEM);$(ENABLE_FULLSCREEN_API);$(ENABLE_GAMEPAD);$(ENABLE_GEOLOCATION);$(ENABLE_HIGH_DPI_CANVAS);$(ENABLE_ICONDATABASE);$(ENABLE_INDEXED_DATABASE);$(ENABLE_INPUT_TYPE_COLOR);$(ENABLE_INPUT_SPEECH);$(ENABLE_INPUT_TYPE_DATE);$(ENABLE_INPUT_TYPE_DATETIME_INCOMPLETE);$(ENABLE_INPUT_TYPE_DATETIMELOCAL);$(ENABLE_INPUT_TYPE_MONTH);$(ENABLE_INPUT_TYPE_TIME);$(ENABLE_INPUT_TYPE_WEEK);$(ENABLE_INTL);$(ENABLE_LEGACY_CSS_VENDOR_PREFIXES);$(ENABLE_LEGACY_ENCRYPTED_MEDIA);$(ENABLE_LINK_PRERENDER);$(ENABLE_MATHML);$(ENABLE_METER_ELEMENT);$(ENABLE_MICRODATA);$(ENABLE_MOUSE_CURSOR_SCALE);$(ENABLE_NOTIFICATIONS);$(ENABLE_QUOTA);$(ENABLE_NAVIGATOR_CONTENT_UTILS);$(ENABLE_SCRIPTED_SPEECH);$(ENABLE_SHARED_WORKERS);$(ENABLE_MEDIA_CONTROLS_SCRIPT);$(ENABLE_MEDIA_SOURCE);$(ENABLE_MEDIA_STATISTICS);$(ENABLE_SQL_DATABASE);$(ENABLE_STYLE_SCOPED);$(ENABLE_SUBPIXEL_LAYOUT);$(ENABLE_SVG_DOM_OBJC_BINDINGS);$(ENABLE_SVG_FONTS);$(ENABLE_VIDEO);$(ENABLE_VIDEO_TRACK);$(ENABLE_WEB_AUDIO);$(ENABLE_WEBGL);$(ENABLE_WEBVTT_REGIONS);$(ENABLE_XHR_TIMEOUT);$(ENABLE_XSLT);%(PreprocessorDefinitions)</PreprocessorDefinitions>
>+      <PreprocessorDefinitions>$(ENABLE_3D_TRANSFORMS);$(ENABLE_ACCELERATED_2D_CANVAS);$(ENABLE_ACCELERATED_OVERFLOW_SCROLLING);$(ENABLE_ATTACHMENT_ELEMENT);$(ENABLE_CHANNEL_MESSAGING);$(ENABLE_CSS3_CONDITIONAL_RULES);$(ENABLE_CSS_IMAGE_SET);$(ENABLE_CSS3_TEXT);$(ENABLE_CSS_BOX_DECORATION_BREAK);$(ENABLE_CSS_SHADERS);$(ENABLE_CSS_COMPOSITING);$(ENABLE_CSS_SELECTORS_LEVEL4);$(ENABLE_CSS_SHAPE_INSIDE);$(ENABLE_CSS_TRANSFORMS_ANIMATIONS_TRANSITIONS_UNPREFIXED);$(ENABLE_CURSOR_VISIBILITY);$(ENABLE_CUSTOM_SCHEME_HANDLER);$(ENABLE_DARK_MODE_CSS);$(ENABLE_DATAGRID);$(ENABLE_DATALIST_ELEMENT);$(ENABLE_DEVICE_ORIENTATION);$(ENABLE_DIRECTORY_UPLOAD);$(ENABLE_ENCRYPTED_MEDIA);$(ENABLE_FETCH_API);$(ENABLE_FILE_SYSTEM);$(ENABLE_FULLSCREEN_API);$(ENABLE_GAMEPAD);$(ENABLE_GEOLOCATION);$(ENABLE_HIGH_DPI_CANVAS);$(ENABLE_ICONDATABASE);$(ENABLE_INDEXED_DATABASE);$(ENABLE_INPUT_TYPE_COLOR);$(ENABLE_INPUT_SPEECH);$(ENABLE_INPUT_TYPE_DATE);$(ENABLE_INPUT_TYPE_DATETIME_INCOMPLETE);$(ENABLE_INPUT_TYPE_DATETIMELOCAL);$(ENABLE_INPUT_TYPE_MONTH);$(ENABLE_INPUT_TYPE_TIME);$(ENABLE_INPUT_TYPE_WEEK);$(ENABLE_INTL);$(ENABLE_LEGACY_CSS_VENDOR_PREFIXES);$(ENABLE_LEGACY_ENCRYPTED_MEDIA);$(ENABLE_LINK_PRERENDER);$(ENABLE_MATHML);$(ENABLE_METER_ELEMENT);$(ENABLE_MICRODATA);$(ENABLE_MOUSE_CURSOR_SCALE);$(ENABLE_NOTIFICATIONS);$(ENABLE_QUOTA);$(ENABLE_NAVIGATOR_CONTENT_UTILS);$(ENABLE_SCRIPTED_SPEECH);$(ENABLE_SHARED_WORKERS);$(ENABLE_MEDIA_CONTROLS_SCRIPT);$(ENABLE_MEDIA_SOURCE);$(ENABLE_MEDIA_STATISTICS);$(ENABLE_SQL_DATABASE);$(ENABLE_STYLE_SCOPED);$(ENABLE_SUBPIXEL_LAYOUT);$(ENABLE_SVG_DOM_OBJC_BINDINGS);$(ENABLE_SVG_FONTS);$(ENABLE_VIDEO);$(ENABLE_VIDEO_TRACK);$(ENABLE_WEB_AUDIO);$(ENABLE_WEBGL);$(ENABLE_WEBVTT_REGIONS);$(ENABLE_XHR_TIMEOUT);$(ENABLE_XSLT);%(PreprocessorDefinitions)</PreprocessorDefinitions>
>     </ClCompile>
>   </ItemDefinitionGroup>
>   <ItemGroup>
>@@ -143,6 +144,10 @@
>       <Value>$(ENABLE_CUSTOM_SCHEME_HANDLER)</Value>
>       <EnvironmentVariable>true</EnvironmentVariable>
>     </BuildMacro>
>+    <BuildMacro Include="ENABLE_DARK_MODE_CSS">
>+      <Value>$(ENABLE_DARK_MODE_CSS)</Value>
>+      <EnvironmentVariable>true</EnvironmentVariable>
>+    </BuildMacro>
>     <BuildMacro Include="ENABLE_DATAGRID">
>       <Value>$(ENABLE_DATAGRID)</Value>
>       <EnvironmentVariable>true</EnvironmentVariable>
>diff --git a/Tools/ChangeLog b/Tools/ChangeLog
>index 02d2bf7133c65e284d8201c793634f0a43624f5a..d84a186e92fe7de95194fa7188fd6b7fb47ed1ea 100644
>--- a/Tools/ChangeLog
>+++ b/Tools/ChangeLog
>@@ -1,3 +1,14 @@
>+2018-10-11  Timothy Hatcher  <timothy@apple.com>
>+
>+        Add support for prefers-color-scheme media query
>+        https://bugs.webkit.org/show_bug.cgi?id=190499
>+        rdar://problem/45212025
>+
>+        Reviewed by Dean Jackson.
>+
>+        * Scripts/webkitperl/FeatureList.pm: Added ENABLE_DARK_MODE_CSS as dark-mode-css.
>+        * TestWebKitAPI/Configurations/FeatureDefines.xcconfig: Added ENABLE_DARK_MODE_CSS.
>+
> 2018-10-10  Yusuke Suzuki  <yusukesuzuki@slowstart.org>
> 
>         [JSC] Rename createXXX to tryCreateXXX if it can return RefPtr
>diff --git a/Tools/Scripts/webkitperl/FeatureList.pm b/Tools/Scripts/webkitperl/FeatureList.pm
>index 6c9060d020db27cc47e4d6ebc2080a5c7b1c8490..73e9310eb0262ddf33a873f1193b16c89b7ea305 100644
>--- a/Tools/Scripts/webkitperl/FeatureList.pm
>+++ b/Tools/Scripts/webkitperl/FeatureList.pm
>@@ -65,6 +65,7 @@ my (
>     $customElementsSupport,
>     $customSchemeHandlerSupport,
>     $dataTransferItemsSupport,
>+    $darkModeCSSSupport,
>     $datalistElementSupport,
>     $deviceOrientationSupport,
>     $dom4EventsConstructor,
>@@ -184,6 +185,9 @@ my @features = (
>     { option => "custom-scheme-handler", desc => "Toggle Custom Scheme Handler support",
>       define => "ENABLE_CUSTOM_SCHEME_HANDLER", value => \$customSchemeHandlerSupport },
> 
>+    { option => "dark-mode-css", desc => "Toggle Dark Mode CSS support",
>+      define => "ENABLE_DARK_MODE_CSS", value => \$darkModeCSSSupport },
>+
>     { option => "data-transfer-items", desc => "Toggle Data Transfer Items support",
>       define => "ENABLE_DATA_TRANSFER_ITEMS", value => \$dataTransferItemsSupport },
> 
>diff --git a/Tools/TestWebKitAPI/Configurations/FeatureDefines.xcconfig b/Tools/TestWebKitAPI/Configurations/FeatureDefines.xcconfig
>index 689ed00bdb0f5e59abefa77265c0d4f2a249733b..78c7ec233c02487088f4ac09d3dee2e4ca248807 100644
>--- a/Tools/TestWebKitAPI/Configurations/FeatureDefines.xcconfig
>+++ b/Tools/TestWebKitAPI/Configurations/FeatureDefines.xcconfig
>@@ -96,6 +96,10 @@ ENABLE_CURSOR_VISIBILITY = ENABLE_CURSOR_VISIBILITY;
> 
> ENABLE_CUSTOM_SCHEME_HANDLER = ;
> 
>+ENABLE_DARK_MODE_CSS = $(ENABLE_DARK_MODE_CSS_$(WK_PLATFORM_NAME));
>+ENABLE_DARK_MODE_CSS_macosx = $(ENABLE_DARK_MODE_CSS$(WK_MACOS_1014));
>+ENABLE_DARK_MODE_CSS_MACOS_SINCE_1014 = ENABLE_DARK_MODE_CSS;
>+
> ENABLE_DASHBOARD_SUPPORT = $(ENABLE_DASHBOARD_SUPPORT_$(WK_PLATFORM_NAME));
> ENABLE_DASHBOARD_SUPPORT_macosx = ENABLE_DASHBOARD_SUPPORT;
> 
>@@ -372,4 +376,4 @@ ENABLE_WIRELESS_PLAYBACK_TARGET = ENABLE_WIRELESS_PLAYBACK_TARGET;
> 
> ENABLE_XSLT = ENABLE_XSLT;
> 
>-FEATURE_DEFINES = $(ENABLE_3D_TRANSFORMS) $(ENABLE_ACCELERATED_2D_CANVAS) $(ENABLE_ACCELERATED_OVERFLOW_SCROLLING) $(ENABLE_APPLE_PAY) $(ENABLE_APPLE_PAY_SESSION_V3) $(ENABLE_APPLE_PAY_SESSION_V4) $(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_DEVICE_ADAPTATION) $(ENABLE_CSS_IMAGE_ORIENTATION) $(ENABLE_CSS_IMAGE_RESOLUTION) $(ENABLE_CSS_SCROLL_SNAP) $(ENABLE_CSS_SELECTORS_LEVEL4) $(ENABLE_CSS_TRAILING_WORD) $(ENABLE_CURSOR_VISIBILITY) $(ENABLE_CUSTOM_SCHEME_HANDLER) $(ENABLE_DASHBOARD_SUPPORT) $(ENABLE_DATA_INTERACTION) $(ENABLE_DATACUE_VALUE) $(ENABLE_DATALIST_ELEMENT) $(ENABLE_DEVICE_ORIENTATION) $(ENABLE_DRAG_SUPPORT) $(ENABLE_ENCRYPTED_MEDIA) $(ENABLE_EXPERIMENTAL_FEATURES) $(ENABLE_FAST_JIT_PERMISSIONS) $(ENABLE_FILTERS_LEVEL_2) $(ENABLE_FTL_JIT) $(ENABLE_FULLSCREEN_API) $(ENABLE_GAMEPAD) $(ENABLE_GEOLOCATION) $(ENABLE_ICONDATABASE) $(ENABLE_INDEXED_DATABASE) $(ENABLE_INDEXED_DATABASE_IN_WORKERS) $(ENABLE_INPUT_TYPE_COLOR) $(ENABLE_INPUT_TYPE_DATE) $(ENABLE_INPUT_TYPE_DATETIME_INCOMPLETE) $(ENABLE_INPUT_TYPE_DATETIMELOCAL) $(ENABLE_INPUT_TYPE_MONTH) $(ENABLE_INPUT_TYPE_TIME) $(ENABLE_INPUT_TYPE_WEEK) $(ENABLE_INTERSECTION_OBSERVER) $(ENABLE_INTL) $(ENABLE_IOS_GESTURE_EVENTS) $(ENABLE_IOS_TOUCH_EVENTS) $(ENABLE_JIT) $(ENABLE_JS_ASYNC_ITERATION) $(ENABLE_KEYBOARD_CODE_ATTRIBUTE) $(ENABLE_KEYBOARD_KEY_ATTRIBUTE) $(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_METER_ELEMENT) $(ENABLE_MHTML) $(ENABLE_MOUSE_CURSOR_SCALE) $(ENABLE_NAVIGATOR_CONTENT_UTILS) $(ENABLE_NAVIGATOR_STANDALONE) $(ENABLE_NOTIFICATIONS) $(ENABLE_PAYMENT_REQUEST) $(ENABLE_PDFKIT_PLUGIN) $(ENABLE_POINTER_LOCK) $(ENABLE_PUBLIC_SUFFIX_LIST) $(ENABLE_QUOTA) $(ENABLE_REMOTE_INSPECTOR) $(ENABLE_RESOLUTION_MEDIA_QUERY) $(ENABLE_RESOURCE_USAGE) $(ENABLE_RUBBER_BANDING) $(ENABLE_SERVICE_CONTROLS) $(ENABLE_SERVICE_WORKER) $(ENABLE_SPEECH_SYNTHESIS) $(ENABLE_STREAMS_API) $(ENABLE_SUBTLE_CRYPTO) $(ENABLE_SVG_FONTS) $(ENABLE_TELEPHONE_NUMBER_DETECTION) $(ENABLE_TEXT_AUTOSIZING) $(ENABLE_TOUCH_EVENTS) $(ENABLE_USER_MESSAGE_HANDLERS) $(ENABLE_USERSELECT_ALL) $(ENABLE_VARIATION_FONTS) $(ENABLE_VIDEO) $(ENABLE_VIDEO_PRESENTATION_MODE) $(ENABLE_VIDEO_TRACK) $(ENABLE_VIDEO_USES_ELEMENT_FULLSCREEN) $(ENABLE_WEB_AUDIO) $(ENABLE_WEB_AUTHN) $(ENABLE_WEB_RTC) $(ENABLE_WEBASSEMBLY) $(ENABLE_WEBASSEMBLY_STREAMING_API) $(ENABLE_WEBGL) $(ENABLE_WEBGL2) $(ENABLE_WEBMETAL) $(ENABLE_WIRELESS_PLAYBACK_TARGET) $(ENABLE_XSLT);
>+FEATURE_DEFINES = $(ENABLE_3D_TRANSFORMS) $(ENABLE_ACCELERATED_2D_CANVAS) $(ENABLE_ACCELERATED_OVERFLOW_SCROLLING) $(ENABLE_APPLE_PAY) $(ENABLE_APPLE_PAY_SESSION_V3) $(ENABLE_APPLE_PAY_SESSION_V4) $(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_DEVICE_ADAPTATION) $(ENABLE_CSS_IMAGE_ORIENTATION) $(ENABLE_CSS_IMAGE_RESOLUTION) $(ENABLE_CSS_SCROLL_SNAP) $(ENABLE_CSS_SELECTORS_LEVEL4) $(ENABLE_CSS_TRAILING_WORD) $(ENABLE_CURSOR_VISIBILITY) $(ENABLE_CUSTOM_SCHEME_HANDLER) $(ENABLE_DARK_MODE_CSS) $(ENABLE_DASHBOARD_SUPPORT) $(ENABLE_DATA_INTERACTION) $(ENABLE_DATACUE_VALUE) $(ENABLE_DATALIST_ELEMENT) $(ENABLE_DEVICE_ORIENTATION) $(ENABLE_DRAG_SUPPORT) $(ENABLE_ENCRYPTED_MEDIA) $(ENABLE_EXPERIMENTAL_FEATURES) $(ENABLE_FAST_JIT_PERMISSIONS) $(ENABLE_FILTERS_LEVEL_2) $(ENABLE_FTL_JIT) $(ENABLE_FULLSCREEN_API) $(ENABLE_GAMEPAD) $(ENABLE_GEOLOCATION) $(ENABLE_ICONDATABASE) $(ENABLE_INDEXED_DATABASE) $(ENABLE_INDEXED_DATABASE_IN_WORKERS) $(ENABLE_INPUT_TYPE_COLOR) $(ENABLE_INPUT_TYPE_DATE) $(ENABLE_INPUT_TYPE_DATETIME_INCOMPLETE) $(ENABLE_INPUT_TYPE_DATETIMELOCAL) $(ENABLE_INPUT_TYPE_MONTH) $(ENABLE_INPUT_TYPE_TIME) $(ENABLE_INPUT_TYPE_WEEK) $(ENABLE_INTERSECTION_OBSERVER) $(ENABLE_INTL) $(ENABLE_IOS_GESTURE_EVENTS) $(ENABLE_IOS_TOUCH_EVENTS) $(ENABLE_JIT) $(ENABLE_JS_ASYNC_ITERATION) $(ENABLE_KEYBOARD_CODE_ATTRIBUTE) $(ENABLE_KEYBOARD_KEY_ATTRIBUTE) $(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_METER_ELEMENT) $(ENABLE_MHTML) $(ENABLE_MOUSE_CURSOR_SCALE) $(ENABLE_NAVIGATOR_CONTENT_UTILS) $(ENABLE_NAVIGATOR_STANDALONE) $(ENABLE_NOTIFICATIONS) $(ENABLE_PAYMENT_REQUEST) $(ENABLE_PDFKIT_PLUGIN) $(ENABLE_POINTER_LOCK) $(ENABLE_PUBLIC_SUFFIX_LIST) $(ENABLE_QUOTA) $(ENABLE_REMOTE_INSPECTOR) $(ENABLE_RESOLUTION_MEDIA_QUERY) $(ENABLE_RESOURCE_USAGE) $(ENABLE_RUBBER_BANDING) $(ENABLE_SERVICE_CONTROLS) $(ENABLE_SERVICE_WORKER) $(ENABLE_SPEECH_SYNTHESIS) $(ENABLE_STREAMS_API) $(ENABLE_SUBTLE_CRYPTO) $(ENABLE_SVG_FONTS) $(ENABLE_TELEPHONE_NUMBER_DETECTION) $(ENABLE_TEXT_AUTOSIZING) $(ENABLE_TOUCH_EVENTS) $(ENABLE_USER_MESSAGE_HANDLERS) $(ENABLE_USERSELECT_ALL) $(ENABLE_VARIATION_FONTS) $(ENABLE_VIDEO) $(ENABLE_VIDEO_PRESENTATION_MODE) $(ENABLE_VIDEO_TRACK) $(ENABLE_VIDEO_USES_ELEMENT_FULLSCREEN) $(ENABLE_WEB_AUDIO) $(ENABLE_WEB_AUTHN) $(ENABLE_WEB_RTC) $(ENABLE_WEBASSEMBLY) $(ENABLE_WEBASSEMBLY_STREAMING_API) $(ENABLE_WEBGL) $(ENABLE_WEBGL2) $(ENABLE_WEBMETAL) $(ENABLE_WIRELESS_PLAYBACK_TARGET) $(ENABLE_XSLT);
>diff --git a/LayoutTests/ChangeLog b/LayoutTests/ChangeLog
>index c2e5a48743337f83fdbabc76153ce1e3e36bd0fb..9ba4657ae17239e3a67d24bd0c07fdc079eeed92 100644
>--- a/LayoutTests/ChangeLog
>+++ b/LayoutTests/ChangeLog
>@@ -1,3 +1,20 @@
>+2018-10-11  Timothy Hatcher  <timothy@apple.com>
>+
>+        Add support for prefers-color-scheme media query
>+        https://bugs.webkit.org/show_bug.cgi?id=190499
>+        rdar://problem/45212025
>+
>+        Reviewed by Dean Jackson.
>+
>+        * css-dark-mode/prefers-color-scheme-expected.txt: Added.
>+        * css-dark-mode/prefers-color-scheme.html: Added.
>+        * platform/gtk/TestExpectations: Skip css-dark-mode.
>+        * platform/ios/TestExpectations: Skip css-dark-mode.
>+        * platform/mac-wk1/TestExpectations: Skip css-dark-mode.
>+        * platform/win/TestExpectations: Skip css-dark-mode.
>+        * platform/wincairo/TestExpectations: Skip css-dark-mode.
>+        * platform/wpe/TestExpectations: Skip css-dark-mode.
>+
> 2018-10-09  Antoine Quint  <graouts@apple.com>
> 
>         Remove the frames() timing function
>diff --git a/LayoutTests/css-dark-mode/prefers-color-scheme-expected.txt b/LayoutTests/css-dark-mode/prefers-color-scheme-expected.txt
>new file mode 100644
>index 0000000000000000000000000000000000000000..75c21741be9f64a50a2f6dd39964800ff07dbfac
>--- /dev/null
>+++ b/LayoutTests/css-dark-mode/prefers-color-scheme-expected.txt
>@@ -0,0 +1,5 @@
>+
>+PASS Element colors are correct in light color scheme 
>+PASS Dark color scheme enabled 
>+PASS Element colors are correct in dark color scheme 
>+
>diff --git a/LayoutTests/css-dark-mode/prefers-color-scheme.html b/LayoutTests/css-dark-mode/prefers-color-scheme.html
>new file mode 100644
>index 0000000000000000000000000000000000000000..542cf5e40d268352b833f72df25c43678139450c
>--- /dev/null
>+++ b/LayoutTests/css-dark-mode/prefers-color-scheme.html
>@@ -0,0 +1,68 @@
>+<!DOCTYPE html>
>+
>+
>+
>+<script src="../resources/testharness.js"></script>
>+<script src="../resources/testharnessreport.js"></script>
>+
>+<style>
>+#test1 {
>+    background-color: red;
>+    color: text;
>+}
>+
>+@media (prefers-color-scheme: light) {
>+    #test1 {
>+        background-color: lime;
>+    }
>+}
>+
>+@media (prefers-color-scheme: dark) {
>+    #test1 {
>+        background-color: blue;
>+    }
>+}
>+
>+@media (prefers-color-scheme: foo) {
>+    /* This is invalid and should not apply. */
>+    #test1 {
>+        background-color: yellow;
>+    }
>+}
>+
>+@media (prefers-color-scheme) {
>+    /* This is invalid and should not apply. */
>+    #test1 {
>+        background-color: orange;
>+    }
>+}
>+</style>
>+
>+<div id="test1"></div>
>+
>+<script>
>+function test_prop(id, prop, expected) {
>+    assert_equals(window.getComputedStyle(document.getElementById(id)).getPropertyValue(prop).trim(), expected);
>+}
>+
>+test(function() {
>+    // Styled background-color in media query should be lime green.
>+    test_prop("test1", "background-color", "rgb(0, 255, 0)");
>+
>+    // The semantic text color should be black.
>+    test_prop("test1", "color", "rgb(0, 0, 0)");
>+}, "Element colors are correct in light color scheme");
>+
>+test(function() {
>+    if (window.internals)
>+        internals.settings.setUseDarkAppearance(true);
>+}, "Dark color scheme enabled");
>+
>+test(function() {
>+    // Styled background-color in media query should be blue.
>+    test_prop("test1", "background-color", "rgb(0, 0, 255)");
>+
>+    // The semantic text color should be black, and not change.
>+    test_prop("test1", "color", "rgb(0, 0, 0)");
>+}, "Element colors are correct in dark color scheme");
>+</script>
>diff --git a/LayoutTests/platform/gtk/TestExpectations b/LayoutTests/platform/gtk/TestExpectations
>index 9a9c425263d20875537dfdd9c1d15bf2be40e0be..95de659fd639d6d6180f616ce2283a6f569c68d4 100644
>--- a/LayoutTests/platform/gtk/TestExpectations
>+++ b/LayoutTests/platform/gtk/TestExpectations
>@@ -768,6 +768,9 @@ Bug(GTK) plugins/quicktime-plugin-replacement.html [ Skip ]
> # ENABLE(CSS_SCROLL_SNAP) is disabled.
> css3/scroll-snap [ Skip ]
> 
>+# ENABLE(DARK_MODE_CSS) is disabled.
>+css-dark-mode [ Skip ]
>+
> # ENABLE(WEBVTT_REGIONS) is disabled
> webkit.org/b/109570 media/track/regions-webvtt [ Skip ]
> webkit.org/b/109570 media/track/w3c [ Skip ]
>diff --git a/LayoutTests/platform/ios/TestExpectations b/LayoutTests/platform/ios/TestExpectations
>index eecf511d86e7577d766923792bff30408b38c86b..1163a7808b77837d5e0b0e8ecddc32a4fe43ed93 100644
>--- a/LayoutTests/platform/ios/TestExpectations
>+++ b/LayoutTests/platform/ios/TestExpectations
>@@ -1117,6 +1117,9 @@ fast/viewport/ios/viewport-fit-cover.html [ Pass ]
> fast/viewport/ios/viewport-fit-auto.html [ Pass ]
> fast/css/variables/env/ios [ Pass ]
> 
>+# Dark mode not supported on iOS
>+css-dark-mode [ Skip ]
>+
> ###
> # Known failures
> ##
>@@ -3205,4 +3208,4 @@ quicklook/pages.html [ ImageOnlyFailure ]
> compositing/contents-scale/non-decomposable-matrix.html [ ImageOnlyFailure ]
> 
> # <rdar://problem/41546970> REGRESSION: LayoutTest media/media-fullscreen-loop-inline.html is a flaky timeout
>-media/media-fullscreen-loop-inline.html [ Pass Timeout ]
>\ No newline at end of file
>+media/media-fullscreen-loop-inline.html [ Pass Timeout ]
>diff --git a/LayoutTests/platform/mac-wk1/TestExpectations b/LayoutTests/platform/mac-wk1/TestExpectations
>index 6c4bdfb751f382c8c1207f9bd31c7d942ee5183f..8579c685dd83e141aebda59250868a1e440dc068 100644
>--- a/LayoutTests/platform/mac-wk1/TestExpectations
>+++ b/LayoutTests/platform/mac-wk1/TestExpectations
>@@ -631,6 +631,7 @@ webkit.org/b/188070 imported/w3c/web-platform-tests/streams/piping/error-propaga
> # Not supported on WK1
> imported/w3c/web-platform-tests/css/css-properties-values-api/ [ Skip ]
> css-custom-properties-api [ Skip ]
>+css-dark-mode [ Skip ]
> 
> webkit.org/b/189908 imported/w3c/web-platform-tests/resource-timing/resource_timing.worker.html [ Failure ]
> 
>diff --git a/LayoutTests/platform/win/TestExpectations b/LayoutTests/platform/win/TestExpectations
>index 55bd124baefbc0803307b42e96384cc126bfeabb..d23329dd770f54210b77434876fa1617f36b656c 100644
>--- a/LayoutTests/platform/win/TestExpectations
>+++ b/LayoutTests/platform/win/TestExpectations
>@@ -149,6 +149,9 @@ svg/custom/manually-parsed-embedded-svg-allowed-in-dashboard.html [ Skip ]
> svg/custom/svg-allowed-in-dashboard-object.html [ Skip ]
> mathml/mathml-in-dashboard.html [ Skip ]
> 
>+# Dark mode not supported on Windows
>+css-dark-mode [ Skip ]
>+
> # TODO Accelerated overflow scrolling (ENABLE_ACCELERATED_OVERFLOW_SCROLLING) is not enabled.
> fast/repaint/overflow-scroll-touch-repaint.html [ Skip ]
> 
>diff --git a/LayoutTests/platform/wincairo/TestExpectations b/LayoutTests/platform/wincairo/TestExpectations
>index e6b5050a5803a330ae2a06692c6001e1dbef9a31..b9a4cd60d95cda344b5665ecfa05c5404196f35c 100644
>--- a/LayoutTests/platform/wincairo/TestExpectations
>+++ b/LayoutTests/platform/wincairo/TestExpectations
>@@ -1467,6 +1467,9 @@ fast/css/sticky/sticky-top.html [ Pass ImageOnlyFailure ]
> 
> css-custom-properties-api/ [ Failure ImageOnlyFailure ]
> 
>+# Dark mode not supported on Windows
>+css-dark-mode [ Skip ]
>+
> ################################################################################
> #################            End CSS Issues              #######################
> ################################################################################
>diff --git a/LayoutTests/platform/wpe/TestExpectations b/LayoutTests/platform/wpe/TestExpectations
>index 70aa5a67585b41ac5e63a0693b8a43344e12d906..46e0663e9ceaffd0672307cd288c5936048de022 100644
>--- a/LayoutTests/platform/wpe/TestExpectations
>+++ b/LayoutTests/platform/wpe/TestExpectations
>@@ -181,6 +181,9 @@ fast/events/touch/gesture/long-press-on-draggable-element-triggers-drag.html [ S
> fast/events/touch/gesture/resources/drag-inside-iframe2.html [ Skip ]
> fast/events/touch/gesture/resources/drag-inside-nested-iframes3.html [ Skip ]
> 
>+# ENABLE_DARK_MODE_CSS is OFF in WPE.
>+css-dark-mode [ Skip ]
>+
> # Tests below are copied from wk2 expectations, because we've marked
> #  as passing the whole fast/events directory.
>

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Attachments on bug 190499: 352111 | 352192 | 352356 | 352360 | 352375 | 352378