Use a shared thread for media operations.

webkit/mocks/test_media_stream_client.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.
 
 // TestMediaStreamClient is an implementation of webkit_media::MediaStreamClient
 // and used with WebKit::WebUserMediaClientMock to provide corresponding video
 // decoder to media pipeline.
 
 #ifndef WEBKIT_MOCKS_TEST_MEDIA_STREAM_CLIENT_H_
 #define WEBKIT_MOCKS_TEST_MEDIA_STREAM_CLIENT_H_
 
 #include "base/callback_forward.h"
-#include "third_party/WebKit/Source/Platform/chromium/public/WebURL.h"
 #include "webkit/media/media_stream_client.h"
 
-namespace WebKit {
-class WebFrame;
-class WebMediaPlayer;
-class WebMediaPlayerClient;
-}
-
 namespace webkit_media {
 class MediaStreamAudioRenderer;
-class MediaStreamClient;
 }
 
 namespace webkit_glue {
 
-// This is used by WebFrameClient::createMediaPlayer().
-WebKit::WebMediaPlayer* CreateMediaPlayer(
-    WebKit::WebFrame* frame,
-    const WebKit::WebURL& url,
-    WebKit::WebMediaPlayerClient* client,
-    webkit_media::MediaStreamClient* media_stream_client);
-
 class TestMediaStreamClient : public webkit_media::MediaStreamClient {
  public:
   TestMediaStreamClient();
   virtual ~TestMediaStreamClient();
 
   // Implement webkit_media::MediaStreamClient.
   virtual bool IsMediaStream(const GURL& url) OVERRIDE;
   virtual scoped_refptr<webkit_media::VideoFrameProvider> GetVideoFrameProvider(
       const GURL& url,
       const base::Closure& error_cb,
       const webkit_media::VideoFrameProvider::RepaintCB& repaint_cb) OVERRIDE;
   virtual scoped_refptr<webkit_media::MediaStreamAudioRenderer>
       GetAudioRenderer(const GURL& url) OVERRIDE;
 };
 
 }  // namespace webkit_glue
 
 #endif  // WEBKIT_MOCKS_TEST_MEDIA_STREAM_CLIENT_H_