Enable prominent dark mode active tab by default.

Bug: 1004871
Change-Id: I5f656464715fafd5e29a86594418b8e5433bd143
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1836218
Commit-Queue: Peter Kasting <pkasting@chromium.org>
Reviewed-by: Peter Kasting <pkasting@chromium.org>
Cr-Commit-Position: refs/heads/master@{#702557}

chrome/browser/themes/theme_properties.cc

@@ -157,7 +157,7 @@ base::Optional<SkColor> GetIncognitoColor(int id) {
       return gfx::kGoogleGrey900;
     case ThemeProperties::COLOR_BOOKMARK_TEXT:
     case ThemeProperties::COLOR_TAB_TEXT:
-      return gfx::kGoogleGrey100;
+      return SK_ColorWHITE;
     case ThemeProperties::COLOR_NTP_TEXT:
       return gfx::kGoogleGrey200;
     case ThemeProperties::COLOR_BACKGROUND_TAB_TEXT:

chrome/browser/ui/ui_features.cc

@@ -67,7 +67,7 @@ const base::Feature kTabOutlinesInLowContrastThemes{
 // Enables a more prominent active tab title in dark mode to aid with
 // accessibility.
 const base::Feature kProminentDarkModeActiveTabTitle{
-    "ProminentDarkModeActiveTabTitle", base::FEATURE_DISABLED_BY_DEFAULT};
+    "ProminentDarkModeActiveTabTitle", base::FEATURE_ENABLED_BY_DEFAULT};
 
 // Enables a web-based separator that's only used for performance testing. See
 // https://crbug.com/993502.