Add support for switching the audio output device for HTMLMediaElements.

content/renderer/media/webmediaplayer_ms.h

 // Copyright 2013 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_RENDERER_MEDIA_WEBMEDIAPLAYER_MS_H_
 #define CONTENT_RENDERER_MEDIA_WEBMEDIAPLAYER_MS_H_
 
 #include "base/memory/ref_counted.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/memory/weak_ptr.h"
 #include "base/synchronization/lock.h"
 #include "base/threading/thread_checker.h"
 #include "cc/layers/video_frame_provider.h"
 #include "media/blink/skcanvas_video_renderer.h"
 #include "skia/ext/platform_canvas.h"
 #include "third_party/WebKit/public/platform/WebMediaPlayer.h"
+#include "third_party/WebKit/public/platform/WebSetAudioOutputDeviceRequest.h"
 #include "url/gurl.h"
 
 namespace blink {
 class WebFrame;
 class WebGraphicsContext3D;
 class WebMediaPlayerClient;
 }
 
 namespace media {
 class MediaLog;
@@ skipping 41 matching lines @@
                     const blink::WebURL& url,
                     CORSMode cors_mode);
 
   // Playback controls.
   virtual void play();
   virtual void pause();
   virtual bool supportsSave() const;
   virtual void seek(double seconds);
   virtual void setRate(double rate);
   virtual void setVolume(double volume);
+  virtual void setAudioOutputDevice(
+      const blink::WebSetAudioOutputDeviceRequest& request);
   virtual void setPreload(blink::WebMediaPlayer::Preload preload);
   virtual blink::WebTimeRanges buffered() const;
   virtual blink::WebTimeRanges seekable() const;
 
   // Methods for painting.
   virtual void paint(blink::WebCanvas* canvas,
                      const blink::WebRect& rect,
                      unsigned char alpha,
                      SkXfermode::Mode mode);
 
@@ skipping 61 matching lines @@
   void OnSourceError();
 
   // Helpers that set the network/ready state and notifies the client if
   // they've changed.
   void SetNetworkState(blink::WebMediaPlayer::NetworkState state);
   void SetReadyState(blink::WebMediaPlayer::ReadyState state);
 
   // Getter method to |client_|.
   blink::WebMediaPlayerClient* GetClient();
 
-  blink::WebFrame* frame_;
+  static void PrepareFinishSetAudioOutputRequest(
+      WebMediaPlayerMS* media_player,
+      const scoped_refptr<base::SingleThreadTaskRunner> task_runner,
+      blink::WebSetAudioOutputDeviceRequest* request,
+      int result);
+  void FinishSetAudioOutputRequest(
+        blink::WebSetAudioOutputDeviceRequest *request,
+        int result);
+
+    blink::WebFrame* frame_;
 
   blink::WebMediaPlayer::NetworkState network_state_;
   blink::WebMediaPlayer::ReadyState ready_state_;
 
   blink::WebTimeRanges buffered_;
 
   float volume_;
 
-  // Used for DCHECKs to ensure methods calls executed in the correct thread.
-  base::ThreadChecker thread_checker_;
+  // Task runner for posting tasks on Chrome's main thread. Also used
+  // for DCHECKs so methods calls won't execute in the wrong thread.
+  const scoped_refptr<base::SingleThreadTaskRunner> main_task_runner_;
 
   blink::WebMediaPlayerClient* client_;
 
   base::WeakPtr<media::WebMediaPlayerDelegate> delegate_;
 
   // Specify content:: to disambiguate from cc::.
   scoped_refptr<content::VideoFrameProvider> video_frame_provider_;
   bool paused_;
 
   // |current_frame_| is updated only on main thread. The object it holds
@@ skipping 27 matching lines @@
   scoped_refptr<media::MediaLog> media_log_;
 
   scoped_ptr<MediaStreamRendererFactory> renderer_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(WebMediaPlayerMS);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_RENDERER_MEDIA_WEBMEDIAPLAYER_MS_H_