[Controls Refresh] Update the default dark background color on Chromium

This CL changes the default background color for pages with the <meta name="color-scheme" content="light dark"> tag.

Bug: 1094649
Change-Id: I80afe70345a99daa4de47a54c704e46c267ebec0
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2271520
Commit-Queue: Sam Sebree <sasebree@microsoft.com>
Reviewed-by: Mason Freed <masonfreed@chromium.org>
Cr-Commit-Position: refs/heads/master@{#784152}

third_party/blink/renderer/core/css/style_engine.cc

@@ -2187,7 +2187,7 @@ void StyleEngine::UpdateForcedBackgroundColor() {
 
 Color StyleEngine::ColorAdjustBackgroundColor() const {
   if (use_dark_background_ && forced_colors_ == ForcedColors::kNone)
-    return Color::kBlack;
+    return Color(0x12, 0x12, 0x12);
 
   DCHECK(forced_colors_ != ForcedColors::kNone);
   return ForcedBackgroundColor();

third_party/blink/renderer/core/css/style_engine_test.cc

@@ -2167,7 +2167,8 @@ TEST_F(StyleEngineTest, ColorSchemeBaseBackgroundChange) {
       CSSPropertyID::kColorScheme, "dark");
   UpdateAllLifecyclePhases();
 
-  EXPECT_EQ(Color::kBlack, GetDocument().View()->BaseBackgroundColor());
+  EXPECT_EQ(Color(0x12, 0x12, 0x12),
+            GetDocument().View()->BaseBackgroundColor());
 
   color_scheme_helper.SetForcedColors(GetDocument(), ForcedColors::kActive);
   UpdateAllLifecyclePhases();

third_party/blink/renderer/core/exported/web_view_test.cc

@@ -583,13 +583,13 @@ TEST_F(WebViewTest, SetBaseBackgroundColorWithColorScheme) {
 
   color_scheme_helper.SetPreferredColorScheme(PreferredColorScheme::kDark);
   UpdateAllLifecyclePhases();
-  EXPECT_EQ(Color::kBlack, frame_view->BaseBackgroundColor());
+  EXPECT_EQ(Color(0x12, 0x12, 0x12), frame_view->BaseBackgroundColor());
 
   // Don't let dark color-scheme override a transparent background.
   web_view->SetBaseBackgroundColor(SK_ColorTRANSPARENT);
   EXPECT_EQ(Color::kTransparent, frame_view->BaseBackgroundColor());
   web_view->SetBaseBackgroundColor(SK_ColorBLUE);
-  EXPECT_EQ(Color::kBlack, frame_view->BaseBackgroundColor());
+  EXPECT_EQ(Color(0x12, 0x12, 0x12), frame_view->BaseBackgroundColor());
 
   color_scheme_helper.SetForcedColors(*(web_view->GetPage()),
                                       ForcedColors::kActive);
@@ -602,7 +602,7 @@ TEST_F(WebViewTest, SetBaseBackgroundColorWithColorScheme) {
   color_scheme_helper.SetForcedColors(*(web_view->GetPage()),
                                       ForcedColors::kNone);
   UpdateAllLifecyclePhases();
-  EXPECT_EQ(Color::kBlack, frame_view->BaseBackgroundColor());
+  EXPECT_EQ(Color(0x12, 0x12, 0x12), frame_view->BaseBackgroundColor());
 
   color_scheme_helper.SetPreferredColorScheme(PreferredColorScheme::kLight);
   UpdateAllLifecyclePhases();