[GCM] Fixing the client interval interaction with heartbeat ack

google_apis/gcm/engine/heartbeat_manager.h

Index: google_apis/gcm/engine/heartbeat_manager.h
diff --git a/google_apis/gcm/engine/heartbeat_manager.h b/google_apis/gcm/engine/heartbeat_manager.h
index fe3bba680a5b78baac7c5a99639c9a3b8fa6610a..b8efe0374c0e2bfa0b350fcb9d0264fef8b76f1d 100644
--- a/google_apis/gcm/engine/heartbeat_manager.h
+++ b/google_apis/gcm/engine/heartbeat_manager.h
@@ -91,6 +91,9 @@ class GCM_EXPORT HeartbeatManager : public base::PowerObserver {
   // Restarts the heartbeat timer.
   void RestartTimer();
 
+  // Calculates and sets the current heartbeat interval.
+  void UpdateHeartbeatInterval();
+
   // Calculates default heartbeat interval, depending on current network.
   int GetDefaultHeartbeatInterval();