SystemMonitor refactoring: move power state monitor into a separate class called PowerMonitor

content/browser/browser_main_loop.h

 // Copyright (c) 2012 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 CONTENT_BROWSER_BROWSER_MAIN_LOOP_H_
 #define CONTENT_BROWSER_BROWSER_MAIN_LOOP_H_
 
 #include "base/basictypes.h"
 #include "base/memory/scoped_ptr.h"
 #include "content/browser/browser_process_sub_thread.h"
 
 class BrowserOnlineStateObserver;
 class CommandLine;
 class HighResolutionTimerManager;
 class MessageLoop;
 class SystemMessageWindowWin;
 
 namespace base {
+class PowerMonitor;
 class SystemMonitor;
 }
 
 namespace media {
 class AudioManager;
 }
 
 namespace media_stream {
 class MediaStreamManager;
 }
@@ skipping 62 matching lines @@
 
   void MainMessageLoopRun();
 
   // Members initialized on construction ---------------------------------------
   const content::MainFunctionParams& parameters_;
   const CommandLine& parsed_command_line_;
   int result_code_;
 
   // Members initialized in |MainMessageLoopStart()| ---------------------------
   scoped_ptr<MessageLoop> main_message_loop_;
+  scoped_ptr<base::PowerMonitor> power_monitor_;
   scoped_ptr<base::SystemMonitor> system_monitor_;
   scoped_ptr<HighResolutionTimerManager> hi_res_timer_manager_;
   scoped_ptr<net::NetworkChangeNotifier> network_change_notifier_;
   scoped_ptr<media::AudioManager> audio_manager_;
   scoped_ptr<media_stream::MediaStreamManager> media_stream_manager_;
   // Per-process listener for online state changes.
   scoped_ptr<BrowserOnlineStateObserver> online_state_observer_;
 #if defined(OS_WIN)
   scoped_ptr<SystemMessageWindowWin> system_message_window_;
 #elif defined(OS_LINUX)
@@ skipping 24 matching lines @@
   scoped_ptr<BrowserProcessSubThread> process_launcher_thread_;
   scoped_ptr<BrowserProcessSubThread> cache_thread_;
   scoped_ptr<BrowserProcessSubThread> io_thread_;
 
   DISALLOW_COPY_AND_ASSIGN(BrowserMainLoop);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_BROWSER_MAIN_LOOP_H_