[GCM] Adding handling of heartbeat intervals to the GCM store.

google_apis/gcm/engine/gcm_store.h

Index: google_apis/gcm/engine/gcm_store.h
diff --git a/google_apis/gcm/engine/gcm_store.h b/google_apis/gcm/engine/gcm_store.h
index 9bad954b669aaf40ba1639100055887149c2fc3f..0cbb0857243840637279f8104781527316953221 100644
--- a/google_apis/gcm/engine/gcm_store.h
+++ b/google_apis/gcm/engine/gcm_store.h
@@ -56,6 +56,7 @@ class GCM_EXPORT GCMStore {
     std::set<std::string> last_checkin_accounts;
     AccountMappings account_mappings;
     base::Time last_token_fetch_time;
+    std::map<std::string, int> heartbeat_intervals;
   };
 
   typedef std::vector<std::string> PersistentIdList;
@@ -133,6 +134,13 @@ class GCM_EXPORT GCMStore {
   virtual void SetLastTokenFetchTime(const base::Time& time,
                                      const UpdateCallback& callback) = 0;
 
+  // Sets the custom client heartbeat interval for a specified scope.
+  virtual void AddHeartbeatInterval(const std::string& scope,
+                                    int interval_ms,
+                                    const UpdateCallback& callback) = 0;
+  virtual void RemoveHeartbeatInterval(const std::string& scope,
+                                       const UpdateCallback& callback) = 0;
+
  private:
   DISALLOW_COPY_AND_ASSIGN(GCMStore);
 };