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      1 // Copyright (c) 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_CHILD_POWER_MONITOR_BROADCAST_SOURCE_H_
      6 #define CONTENT_CHILD_POWER_MONITOR_BROADCAST_SOURCE_H_
      7 
      8 #include "base/power_monitor/power_monitor_source.h"
      9 #include "content/common/content_export.h"
     10 #include "ipc/ipc_channel.h"
     11 #include "ipc/ipc_channel_proxy.h"
     12 
     13 namespace content {
     14 
     15 class PowerMessageFilter;
     16 
     17 // Receives Power Monitor IPC messages sent from the browser process and relays
     18 // them to the PowerMonitor of the current process.
     19 class CONTENT_EXPORT PowerMonitorBroadcastSource :
     20     public base::PowerMonitorSource {
     21  public:
     22   explicit PowerMonitorBroadcastSource();
     23   virtual ~PowerMonitorBroadcastSource();
     24 
     25   IPC::ChannelProxy::MessageFilter* GetMessageFilter();
     26 
     27  private:
     28   friend class PowerMessageFilter;
     29 
     30   virtual bool IsOnBatteryPowerImpl() OVERRIDE;
     31 
     32   void OnPowerStateChange(bool on_battery_power);
     33   void OnSuspend();
     34   void OnResume();
     35 
     36   bool last_reported_battery_power_state_;
     37   scoped_refptr<PowerMessageFilter> message_filter_;
     38 
     39   DISALLOW_COPY_AND_ASSIGN(PowerMonitorBroadcastSource);
     40 };
     41 
     42 }  // namespace content
     43 
     44 #endif  // CONTENT_CHILD_POWER_MONITOR_MESSAGE_FILTER_H_
     45