[Media Router] Add cloud services preferences.

chrome/common/pref_names.cc

Index: chrome/common/pref_names.cc
diff --git a/chrome/common/pref_names.cc b/chrome/common/pref_names.cc
index 30030244db364be3f00caefa9b378c3836259937..a9f60db6b2bc57202e9216734211220126448fde 100644
--- a/chrome/common/pref_names.cc
+++ b/chrome/common/pref_names.cc
@@ -2162,6 +2162,15 @@ const char kClickedUpdateMenuItem[] = "omaha.clicked_update_menu_item";
 #endif
 
 #if defined(ENABLE_MEDIA_ROUTER)
+#if defined(GOOGLE_CHROME_BUILD)
+// Whether or not the user has explicitly set the cloud services preference
+// through the first run flow.
+const char kMediaRouterCloudServicesPrefSet[] =
+    "media_router.cloudservices.prefset";
+// Whether or not the user has enabled cloud services with Media Router.
+const char kMediaRouterEnableCloudServices[] =
+    "media_router.cloudservices.enabled";
+#endif  // defined(GOOGLE_CHROME_BUILD)
 // Whether or not the Media Router first run flow has been acknowledged by the
 // user.
 const char kMediaRouterFirstRunFlowAcknowledged[] =