Part 1: Plumb render view ID to render host

content/renderer/render_view_impl.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_RENDERER_RENDER_VIEW_IMPL_H_
 #define CONTENT_RENDERER_RENDER_VIEW_IMPL_H_
 
 #include <deque>
 #include <map>
 #include <set>
@@ skipping 495 matching lines @@
       const WebKit::WebPluginParams& params);
   virtual WebKit::WebSharedWorker* createSharedWorker(
       WebKit::WebFrame* frame, const WebKit::WebURL& url,
       const WebKit::WebString& name, unsigned long long documentId);
   virtual WebKit::WebMediaPlayer* createMediaPlayer(
       WebKit::WebFrame* frame,
       WebKit::WebMediaPlayerClient* client);
   virtual WebKit::WebApplicationCacheHost* createApplicationCacheHost(
       WebKit::WebFrame* frame,
       WebKit::WebApplicationCacheHostClient* client);
+  virtual WebKit::WebAudioDevice* createAudioDevice(
+      size_t bufferSize,
+      unsigned numberOfChannels,
+      double sampleRate,
+      WebKit::WebAudioDevice::RenderCallback* callback) OVERRIDE;
   virtual WebKit::WebCookieJar* cookieJar(WebKit::WebFrame* frame);
   virtual void frameDetached(WebKit::WebFrame* frame);
   virtual void willClose(WebKit::WebFrame* frame);
   virtual void loadURLExternally(WebKit::WebFrame* frame,
                                  const WebKit::WebURLRequest& request,
                                  WebKit::WebNavigationPolicy policy);
   virtual void loadURLExternally(WebKit::WebFrame* frame,
                                  const WebKit::WebURLRequest& request,
                                  WebKit::WebNavigationPolicy policy,
                                  const WebKit::WebString& suggested_name);
@@ skipping 903 matching lines @@
   // bunch of stuff, you should probably create a helper class and put your
   // data and methods on that to avoid bloating RenderView more.  You can
   // use the Observer interface to filter IPC messages and receive frame change
   // notifications.
   // ---------------------------------------------------------------------------
 
   DISALLOW_COPY_AND_ASSIGN(RenderViewImpl);
 };
 
 #endif  // CONTENT_RENDERER_RENDER_VIEW_IMPL_H_