Adds power state suspend/resume messages to the webrtc native log.

content/browser/renderer_host/media/media_stream_manager.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.
 
 // MediaStreamManager is used to open/enumerate media capture devices (video
 // supported now). Call flow:
 // 1. GenerateStream is called when a render process wants to use a capture
 //    device.
 // 2. MediaStreamManager will ask MediaStreamUIController for permission to
 //    use devices and for which device to use.
@@ skipping 13 matching lines @@
 #define CONTENT_BROWSER_RENDERER_HOST_MEDIA_MEDIA_STREAM_MANAGER_H_
 
 #include <map>
 #include <set>
 #include <string>
 
 #include "base/basictypes.h"
 #include "base/memory/ref_counted.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/message_loop/message_loop.h"
+#include "base/power_monitor/power_observer.h"
 #include "base/system_monitor/system_monitor.h"
 #include "content/browser/renderer_host/media/media_stream_provider.h"
 #include "content/common/content_export.h"
 #include "content/common/media/media_stream_options.h"
 #include "content/public/browser/media_request_state.h"
 #include "content/public/browser/resource_context.h"
 
 namespace media {
 class AudioManager;
 }
 
 namespace content {
 
 class AudioInputDeviceManager;
 class FakeMediaStreamUIProxy;
 class MediaStreamDeviceSettings;
 class MediaStreamRequester;
 class MediaStreamUIProxy;
 class VideoCaptureManager;
 
 // MediaStreamManager is used to generate and close new media devices, not to
 // start the media flow. The classes requesting new media streams are answered
 // using MediaStreamRequester.
 class CONTENT_EXPORT MediaStreamManager
     : public MediaStreamProviderListener,
       public base::MessageLoop::DestructionObserver,
+      public base::PowerObserver,
       public base::SystemMonitor::DevicesChangedObserver {
  public:
   // Callback to deliver the result of a media request.
   typedef base::Callback<void(const MediaStreamDevices& devices,
                               scoped_ptr<MediaStreamUIProxy> ui)>
       MediaRequestResponseCallback;
 
   explicit MediaStreamManager(media::AudioManager* audio_manager);
   virtual ~MediaStreamManager();
 
@@ skipping 115 matching lines @@
   // Sends log messages to the render process hosts whose corresponding render
   // processes are making device requests, to be used by the
   // webrtcLoggingPrivate API if requested.
   void AddLogMessageOnIOThread(const std::string& message);
 
   // Adds |message| to native logs for outstanding device requests, for use by
   // render processes hosts whose corresponding render processes are requesting
   // logging from webrtcLoggingPrivate API. Safe to call from any thread.
   static void SendMessageToNativeLog(const std::string& message);
 
+  // base::PowerObserver overrides.
+  virtual void OnSuspend() OVERRIDE;
+  virtual void OnResume() OVERRIDE;
+
  protected:
   // Used for testing.
   MediaStreamManager();
 
  private:
   // Contains all data needed to keep track of requests.
   class DeviceRequest;
 
   // Cache enumerated device list.
   struct EnumerationCache {
@@ skipping 169 matching lines @@
 
   bool use_fake_ui_;
   scoped_ptr<FakeMediaStreamUIProxy> fake_ui_;
 
   DISALLOW_COPY_AND_ASSIGN(MediaStreamManager);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_RENDERER_HOST_MEDIA_MEDIA_STREAM_MANAGER_H_