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      1 // Copyright 2013 The Chromium Authors. All rights reserved.
      2 // Use of this source code is governed by a BSD-style license that can be
      3 // found in the LICENSE file.
      4 
      5 #ifndef CONTENT_BROWSER_POWER_MONITOR_MESSAGE_BROADCASTER_H_
      6 #define CONTENT_BROWSER_POWER_MONITOR_MESSAGE_BROADCASTER_H_
      7 
      8 #include "base/basictypes.h"
      9 #include "base/memory/ref_counted.h"
     10 #include "base/power_monitor/power_observer.h"
     11 #include "content/common/content_export.h"
     12 #include "content/public/browser/browser_thread.h"
     13 
     14 namespace IPC {
     15   class Sender;
     16 }
     17 
     18 namespace content {
     19 
     20 // A class used to monitor the power state change and communicate it to child
     21 // processes via IPC.
     22 class CONTENT_EXPORT PowerMonitorMessageBroadcaster
     23     : public base::PowerObserver {
     24  public:
     25   explicit PowerMonitorMessageBroadcaster(IPC::Sender* sender);
     26   virtual ~PowerMonitorMessageBroadcaster();
     27 
     28   // Implement PowerObserver.
     29   virtual void OnPowerStateChange(bool on_battery_power) OVERRIDE;
     30   virtual void OnSuspend() OVERRIDE;
     31   virtual void OnResume() OVERRIDE;
     32 
     33  private:
     34   IPC::Sender* sender_;
     35 
     36   DISALLOW_COPY_AND_ASSIGN(PowerMonitorMessageBroadcaster);
     37 };
     38 
     39 }  // namespace base
     40 
     41 #endif  // CONTENT_BROWSER_POWER_MONITOR_MESSAGE_BROADCASTER_H_