WebMediaPlayerImpl needs to own the audio source provider.

chrome/renderer/prerender/prerender_webmediaplayer.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 CHROME_RENDERER_PRERENDER_PRERENDER_WEBMEDIAPLAYER_H_
 #define CHROME_RENDERER_PRERENDER_PRERENDER_WEBMEDIAPLAYER_H_
 #pragma once
 
 #include "base/memory/scoped_ptr.h"
 #include "base/memory/weak_ptr.h"
 #include "content/public/renderer/render_view_observer.h"
+#include "media/base/audio_renderer_sink.h"
 #include "webkit/media/webmediaplayer_impl.h"
 
 namespace webkit_media {
 class MediaStreamClient;
 class WebMediaPlayerDelegate;
 }
 
 namespace prerender {
 
 // Substitute for WebMediaPlayerImpl to be used in prerendered pages. Defers
 // the loading of the media till the prerendered page is swapped in.
 class PrerenderWebMediaPlayer
     : public content::RenderViewObserver,
       public webkit_media::WebMediaPlayerImpl {
  public:
   PrerenderWebMediaPlayer(
       content::RenderView* render_view,
       WebKit::WebFrame* frame,
       WebKit::WebMediaPlayerClient* client,
       base::WeakPtr<webkit_media::WebMediaPlayerDelegate> delegate,
       media::FilterCollection* collection,
       WebKit::WebAudioSourceProvider* audio_source_provider,
+      media::AudioRendererSink* audio_renderer_sink,
       media::MessageLoopFactory* message_loop_factory,
       webkit_media::MediaStreamClient* media_stream_client,
       media::MediaLog* media_log);
   virtual ~PrerenderWebMediaPlayer();
 
   // WebMediaPlayerImpl methods:
   virtual void load(const WebKit::WebURL& url, CORSMode cors_mode) OVERRIDE;
   virtual void cancelLoad() OVERRIDE;
 
  private:
   // RenderViewObserver method:
   virtual bool OnMessageReceived(const IPC::Message& message) OVERRIDE;
 
   void OnSetIsPrerendering(bool is_prerendering);
 
   bool is_prerendering_;
   bool url_loaded_;
   scoped_ptr<WebKit::WebURL> url_to_load_;
   CORSMode cors_mode_;
 
   DISALLOW_COPY_AND_ASSIGN(PrerenderWebMediaPlayer);
 };
 
 }  // namespace prerender
 
 #endif  // CHROME_RENDERER_PRERENDER_PRERENDER_WEBMEDIAPLAYER_H_