[GCM] Stop/restart GCM when the state is forced off/on

chrome/browser/services/gcm/gcm_profile_service.h

Index: chrome/browser/services/gcm/gcm_profile_service.h
diff --git a/chrome/browser/services/gcm/gcm_profile_service.h b/chrome/browser/services/gcm/gcm_profile_service.h
index a516d710c221b435ef35a4b3d2460d3a87abcc92..6f53ffaae45cbfaf04aa1f7050b945a4b389a903 100644
--- a/chrome/browser/services/gcm/gcm_profile_service.h
+++ b/chrome/browser/services/gcm/gcm_profile_service.h
@@ -74,6 +74,10 @@ class GCMProfileService : public BrowserContextKeyedService,
 
   void Initialize(scoped_ptr<GCMClientFactory> gcm_client_factory);
 
+  void Start();
+
+  void Stop();
+
   // Registers |sender_id| for an app. A registration ID will be returned by
   // the GCM server.
   // |app_id|: application ID.
@@ -128,6 +132,10 @@ class GCMProfileService : public BrowserContextKeyedService,
   // the profile was signed in.
   void EnsureLoaded();
 
+  // Remove cached or persisted data when GCM service is stopped.
+  void RemoveCachedData();
+  void RemovePersistedData();
+
   // Checks out of GCM when the profile has been signed out. This will erase
   // all the cached and persisted data.
   void CheckOut();