Add support for setting web theme preference in cast

Bug: b/156272300
Test: None
Change-Id: I19bf284742e8ad98ec6854754aa39cc83632318c
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2199704
Commit-Queue: Albert Chaulk <achaulk@chromium.org>
Reviewed-by: Daniel Nicoara <dnicoara@chromium.org>
Cr-Commit-Position: refs/heads/master@{#770644}

chromecast/base/pref_names.cc

@@ -51,5 +51,8 @@ const char kStabilityRendererHangCount[] =
 const char kStabilitySystemUncleanShutdownCount[] =
     "user_experience_metrics.stability.system_unclean_shutdowns";
 
+// Current web color scheme. See blink::PreferredColorScheme.
+const char kWebColorScheme[] = "web-color-scheme";
+
 }  // namespace prefs
 }  // namespace chromecast

chromecast/base/pref_names.h

@@ -19,6 +19,7 @@ extern const char kStabilityRendererCrashCount[];
 extern const char kStabilityRendererFailedLaunchCount[];
 extern const char kStabilityRendererHangCount[];
 extern const char kStabilitySystemUncleanShutdownCount[];
+extern const char kWebColorScheme[];
 
 }  // namespace prefs
 }  // namespace chromecast

chromecast/browser/cast_content_browser_client.cc

@@ -26,6 +26,7 @@
 #include "chromecast/base/cast_features.h"
 #include "chromecast/base/cast_paths.h"
 #include "chromecast/base/chromecast_switches.h"
+#include "chromecast/base/pref_names.h"
 #include "chromecast/browser/application_media_info_manager.h"
 #include "chromecast/browser/browser_buildflags.h"
 #include "chromecast/browser/cast_browser_context.h"
@@ -57,6 +58,7 @@
 #include "chromecast/media/service/cast_renderer.h"
 #include "chromecast/media/service/mojom/video_geometry_setter.mojom.h"
 #include "chromecast/public/media/media_pipeline_backend.h"
+#include "components/prefs/pref_service.h"
 #include "content/public/browser/browser_task_traits.h"
 #include "content/public/browser/browser_thread.h"
 #include "content/public/browser/certificate_request_result_type.h"
@@ -548,6 +550,10 @@ void CastContentBrowserClient::OverrideWebkitPrefs(
       prefs->databases_enabled = true;
     }
   }
+
+  prefs->preferred_color_scheme = static_cast<blink::PreferredColorScheme>(
+      CastBrowserProcess::GetInstance()->pref_service()->GetInteger(
+          prefs::kWebColorScheme));
 }
 
 std::string CastContentBrowserClient::GetApplicationLocale() {

chromecast/browser/pref_service_helper.cc

@@ -57,6 +57,7 @@ std::unique_ptr<PrefService> PrefServiceHelper::CreatePrefService(
   registry->RegisterBooleanPref(prefs::kOptInStats, true);
   registry->RegisterListPref(prefs::kActiveDCSExperiments);
   registry->RegisterDictionaryPref(prefs::kLatestDCSFeatures);
+  registry->RegisterIntegerPref(prefs::kWebColorScheme, 0);
 
   cdm::MediaDrmStorageImpl::RegisterProfilePrefs(registry);