Reland "[Chromecast] Use base::FeatureList to control features."

chromecast/base/pref_names.cc

Index: chromecast/base/pref_names.cc
diff --git a/chromecast/base/pref_names.cc b/chromecast/base/pref_names.cc
index 237f133663f7ce5b241bd0c87607e210981d9c4e..9ef0f0618a81ebea93d26de8711a3fe27c514144 100644
--- a/chromecast/base/pref_names.cc
+++ b/chromecast/base/pref_names.cc
@@ -7,6 +7,9 @@
 namespace chromecast {
 namespace prefs {
 
+// List of experiments enabled by DCS. For metrics purposes only.
+const char kActiveDCSExperiments[] = "experiments.ids";
+
 // Boolean which specifies if remote debugging is enabled
 const char kEnableRemoteDebugging[] = "enable_remote_debugging";
 
@@ -14,6 +17,9 @@ const char kEnableRemoteDebugging[] = "enable_remote_debugging";
 // due to bug b/9487011.
 const char kMetricsIsNewClientID[] = "user_experience_metrics.is_new_client_id";
 
+// Dictionary of remotely-enabled features from the latest DCS config fetch.
+const char kLatestDCSFeatures[] = "experiments.features";
+
 // Whether or not to report metrics and crashes.
 const char kOptInStats[] = "opt-in.stats";