Ship Forced Colors Mode

Set the ForcedColors flag to 'stable' and update test expectations.
This includes the launch of the 'forced-colors' media query and
the 'forced-color-adjust' CSS property.

Intent-to-ship:
https://groups.google.com/a/chromium.org/g/blink-dev/c/hkjRPJ1-Ruk

Note: There is an open blocking bug for this feature. It is blocked
on a spec issue, but this should be resolved next week, and I will
make sure the resulting fix gets backported to the correct release.
https://bugs.chromium.org/p/chromium/issues/detail?id=1166392

Bug: 970285,1148418
Change-Id: I7eeedf57f1dc66a6935ab153d166ea9718b27e8c
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2630827Reviewed-by: Chris Harrelson <chrishtr@chromium.org>
Reviewed-by: Scott Violet <sky@chromium.org>
Commit-Queue: Alison Maher <almaher@microsoft.com>
Cr-Commit-Position: refs/heads/master@{#844097}

third_party/blink/renderer/platform/runtime_enabled_features.json5

@@ -922,9 +922,7 @@
     // For simulating Android's overlay fullscreen video in web tests on Linux.
     {
       name: "ForcedColors",
-      // No status because this blink runtime feature doesn't work by itself.
-      // It's controlled by the corresponding Chromium feature which needs to
-      // be enabled to make the whole feature work.
+      status: "stable",
     },
     {
       name: "ForceDeferScriptIntervention",

third_party/blink/web_tests/VirtualTestSuites

@@ -566,11 +566,6 @@
     "args": ["--disable-features=SameSiteByDefaultCookies",
              "--disable-features=CookiesWithoutSameSiteMustBeSecure"]
   },
-  {
-    "prefix": "forced-colors",
-    "bases": ["external/wpt/css/css-forced-color-adjust"],
-    "args": ["--enable-blink-features=ForcedColors"]
-  },
   {
     "prefix": "forced-high-contrast-colors",
     "bases": ["external/wpt/forced-colors-mode",

third_party/blink/web_tests/external/wpt/css/css-forced-color-adjust/inheritance-expected.txt

-This is a testharness.js-based test.
-FAIL Property forced-color-adjust has initial value auto assert_true: forced-color-adjust doesn't seem to be supported in the computed style expected true got false
-FAIL Property forced-color-adjust inherits assert_true: forced-color-adjust doesn't seem to be supported in the computed style expected true got false
-Harness: the test ran to completion.
-

third_party/blink/web_tests/external/wpt/css/css-forced-color-adjust/parsing/forced-color-adjust-computed-expected.txt

-This is a testharness.js-based test.
-FAIL Property forced-color-adjust value 'auto' assert_true: forced-color-adjust doesn't seem to be supported in the computed style expected true got false
-FAIL Property forced-color-adjust value 'none' assert_true: forced-color-adjust doesn't seem to be supported in the computed style expected true got false
-Harness: the test ran to completion.
-

third_party/blink/web_tests/external/wpt/css/css-forced-color-adjust/parsing/forced-color-adjust-valid-expected.txt

-This is a testharness.js-based test.
-FAIL e.style['forced-color-adjust'] = "none" should set the property value assert_not_equals: property should be set got disallowed value ""
-FAIL e.style['forced-color-adjust'] = "auto" should set the property value assert_not_equals: property should be set got disallowed value ""
-Harness: the test ran to completion.
-

third_party/blink/web_tests/external/wpt/css/mediaqueries/forced-colors-expected.txt

-This is a testharness.js-based test.
-FAIL Should be parseable in a CSS stylesheet: '(forced-colors)' assert_true: expected true got false
-FAIL Should be parseable in a CSS stylesheet: '(forced-colors: none)' assert_true: expected true got false
-FAIL Should be parseable in a CSS stylesheet: '(forced-colors: active)' assert_true: expected true got false
-PASS Should not be parseable in a CSS stylesheet: '(forced-colors: 0)'
-PASS Should not be parseable in a CSS stylesheet: '(forced-colors: no-preference)'
-PASS Should not be parseable in a CSS stylesheet: '(forced-colors: 10px)'
-PASS Should not be parseable in a CSS stylesheet: '(forced-colors: active 0)'
-PASS Should not be parseable in a CSS stylesheet: '(forced-colors: none active)'
-PASS Should not be parseable in a CSS stylesheet: '(forced-colors: active/none)'
-FAIL Should be parseable in JS: '(forced-colors)' assert_true: expected true got false
-FAIL Should be parseable in JS: '(forced-colors: none)' assert_true: expected true got false
-FAIL Should be parseable in JS: '(forced-colors: active)' assert_true: expected true got false
-PASS Should not be parseable in JS: '(forced-colors: 0)'
-PASS Should not be parseable in JS: '(forced-colors: no-preference)'
-PASS Should not be parseable in JS: '(forced-colors: 10px)'
-PASS Should not be parseable in JS: '(forced-colors: active 0)'
-PASS Should not be parseable in JS: '(forced-colors: none active)'
-PASS Should not be parseable in JS: '(forced-colors: active/none)'
-FAIL Check that none evaluates to false in the boolean context assert_equals: expected true but got false
-Harness: the test ran to completion.
-

third_party/blink/web_tests/virtual/forced-colors/README.md

-This directory is for testing Forced Colors mode implementation.

third_party/blink/web_tests/virtual/forced-colors/external/wpt/css/css-forced-color-adjust/README.txt

-This directory is for testing Forced Colors mode implementation.

third_party/blink/web_tests/virtual/forced-colors/external/wpt/css/css-forced-color-adjust/inheritance-expected.txt

-This is a testharness.js-based test.
-PASS Property forced-color-adjust has initial value auto
-PASS Property forced-color-adjust inherits
-Harness: the test ran to completion.
-

third_party/blink/web_tests/virtual/forced-colors/external/wpt/css/css-forced-color-adjust/parsing/forced-color-adjust-computed-expected.txt

-This is a testharness.js-based test.
-PASS Property forced-color-adjust value 'auto'
-PASS Property forced-color-adjust value 'none'
-Harness: the test ran to completion.
-

third_party/blink/web_tests/virtual/forced-colors/external/wpt/css/css-forced-color-adjust/parsing/forced-color-adjust-valid-expected.txt

-This is a testharness.js-based test.
-PASS e.style['forced-color-adjust'] = "none" should set the property value
-PASS e.style['forced-color-adjust'] = "auto" should set the property value
-Harness: the test ran to completion.
-

third_party/blink/web_tests/virtual/stable/webexposed/css-properties-as-js-properties-expected.txt

@@ -173,6 +173,7 @@ fontVariantLigatures
 fontVariantNumeric
 fontVariationSettings
 fontWeight
+forcedColorAdjust
 gap
 getPropertyPriority
 getPropertyValue

third_party/blink/web_tests/virtual/stable/webexposed/css-property-listing-expected.txt

@@ -190,6 +190,7 @@ All changes to this list should go through Blink's feature review process: http:
     font-variant-numeric
     font-variation-settings
     font-weight
+    forced-color-adjust
     grid-auto-columns
     grid-auto-flow
     grid-auto-rows

third_party/blink/web_tests/webexposed/css-properties-as-js-properties-expected.txt

@@ -180,6 +180,7 @@ fontVariantLigatures
 fontVariantNumeric
 fontVariationSettings
 fontWeight
+forcedColorAdjust
 gap
 getPropertyPriority
 getPropertyValue

third_party/blink/web_tests/webexposed/css-property-listing-expected.txt

@@ -192,6 +192,7 @@ All changes to this list should go through Blink's feature review process: http:
     font-variant-numeric
     font-variation-settings
     font-weight
+    forced-color-adjust
     grid-auto-columns
     grid-auto-flow
     grid-auto-rows

ui/base/ui_base_features.cc

@@ -164,7 +164,7 @@ const base::Feature kDirectManipulationStylus = {
 
 // Enables forced colors mode for web content.
 const base::Feature kForcedColors{"ForcedColors",
-                                  base::FEATURE_DISABLED_BY_DEFAULT};
+                                  base::FEATURE_ENABLED_BY_DEFAULT};
 
 bool IsForcedColorsEnabled() {
   static const bool forced_colors_enabled =