Link GCM heartbeat with wake on wifi preference

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 a0a186ef9d464eed6711aca6fd84dd01c2930e63..0addf90100e5d964d455c075e8cd3cd04a4c7325 100644
--- a/google_apis/gcm/engine/heartbeat_manager.h
+++ b/google_apis/gcm/engine/heartbeat_manager.h
@@ -25,7 +25,7 @@ namespace gcm {
 // receipt/failures and triggering reconnection as necessary.
 class GCM_EXPORT HeartbeatManager {
  public:
-  explicit HeartbeatManager(scoped_ptr<base::Timer> heartbeat_timer);
+  HeartbeatManager();
   ~HeartbeatManager();
 
   // Start the heartbeat logic.
@@ -52,6 +52,9 @@ class GCM_EXPORT HeartbeatManager {
   // pending.
   base::TimeTicks GetNextHeartbeatTime() const;
 
+  // Updates the timer used for scheduling heartbeats.
+  void UpdateHeartbeatTimer(scoped_ptr<base::Timer> timer);
+
  protected:
   // Helper method to send heartbeat on timer trigger.
   void OnHeartbeatTriggered();