[GCM] Adding basic G-services handling

google_apis/gcm/engine/gcm_store_impl.h

Index: google_apis/gcm/engine/gcm_store_impl.h
diff --git a/google_apis/gcm/engine/gcm_store_impl.h b/google_apis/gcm/engine/gcm_store_impl.h
index 971367a8bf01960fad72894a6f4dc453a99f0c0c..c7886dd1b4120df6de82db03b3415a17803e4efb 100644
--- a/google_apis/gcm/engine/gcm_store_impl.h
+++ b/google_apis/gcm/engine/gcm_store_impl.h
@@ -74,6 +74,13 @@ class GCM_EXPORT GCMStoreImpl : public GCMStore {
   virtual void RemoveOutgoingMessages(const PersistentIdList& persistent_ids,
                                       const UpdateCallback& callback) OVERRIDE;
 
+  // GService Settings handling.
+  virtual void UpdateGServicesSettings(
+      const std::vector<std::string>& settings_to_remove,
+      const std::map<std::string, std::string>& settings_to_add,
+      const base::Time& last_checkin_time,
+      const UpdateCallback& callback) OVERRIDE;
+
  private:
   typedef std::map<std::string, int> AppIdToMessageCountMap;