[GCM] Be more aggressive about triggering heartbeats when waking from sleep

google_apis/gcm/engine/heartbeat_manager.h

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef GOOGLE_APIS_GCM_ENGINE_HEARTBEAT_MANAGER_H_
 #define GOOGLE_APIS_GCM_ENGINE_HEARTBEAT_MANAGER_H_
 
 #include "base/callback.h"
 #include "base/logging.h"
 #include "base/memory/scoped_ptr.h"
@@ skipping 43 matching lines @@
   // Returns the next scheduled heartbeat time. A null time means
   // no heartbeat is pending. If non-null and less than the
   // current time (in ticks), the heartbeat has been triggered and an ack is
   // pending.
   base::TimeTicks GetNextHeartbeatTime() const;
 
   // Updates the timer used for scheduling heartbeats.
   void UpdateHeartbeatTimer(scoped_ptr<base::Timer> timer);
 
   // base::PowerObserver override.
+  void OnSuspend() override;
   void OnResume() override;
 
   // Maximum and minimum of the custom client interval that can be requested,
   // calculated based on the network conditions.
   int GetMaxClientHeartbeatIntervalMs();
   int GetMinClientHeartbeatIntervalMs();
 
   // Sets, gets and validates the custom client interval. If the interval is
   // less than the current custom heartbeat interval, the connection will be
   // reset to update the receiving server.
@@ skipping 33 matching lines @@
   // The most recent server-provided heartbeat interval (0 if none has been
   // provided).
   int server_interval_ms_;
 
   // Custom interval requested by the client.
   int client_interval_ms_;
 
   // Timer for triggering heartbeats.
   scoped_ptr<base::Timer> heartbeat_timer_;
 
+  // Time at which the machine was last suspended.
+  base::Time suspend_time_;
+
   // Callbacks for interacting with the the connection.
   base::Closure send_heartbeat_callback_;
   ReconnectCallback trigger_reconnect_callback_;
 
   base::WeakPtrFactory<HeartbeatManager> weak_ptr_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(HeartbeatManager);
 };
 
 }  // namespace gcm
 
 #endif  // GOOGLE_APIS_GCM_ENGINE_HEARTBEAT_MANAGER_H_