Create AudioRendererHost in BrowserRenderProcessHost and hook with ResourceMessageFilter

chrome/browser/renderer_host/browser_render_process_host.h

 // Copyright (c) 2006-2008 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_BROWSER_RENDERER_HOST_BROWSER_RENDER_PROCESS_HOST_H_
 #define CHROME_BROWSER_RENDERER_HOST_BROWSER_RENDER_PROCESS_HOST_H_
 
 #include "build/build_config.h"
 
 #include <string>
 
 #include "base/process.h"
 #include "base/ref_counted.h"
 #include "base/scoped_ptr.h"
 #include "base/shared_memory.h"
+#include "chrome/browser/renderer_host/audio_renderer_host.h"
 #include "chrome/browser/renderer_host/render_process_host.h"
 #include "chrome/common/notification_observer.h"
 #include "webkit/glue/cache_manager.h"
 
 class CommandLine;
 class GURL;
 class PrefService;
 class RenderWidgetHelper;
 class WebContents;
 
@@ skipping 103 matching lines @@
   // backgrounded.
   int32 visible_widgets_;
 
   // Does this process have backgrounded priority.
   bool backgrounded_;
 
   // Used to allow a RenderWidgetHost to intercept various messages on the
   // IO thread.
   scoped_refptr<RenderWidgetHelper> widget_helper_;
 
+  // The host of audio renderers in the renderer process.
+  scoped_refptr<AudioRendererHost> audio_renderer_host_;
+
   DISALLOW_COPY_AND_ASSIGN(BrowserRenderProcessHost);
 };
 
 // Generates a unique channel name for a child renderer/plugin process.
 // The "instance" pointer value is baked into the channel id.
 std::wstring GenerateRandomChannelID(void* instance);
 
 #endif  // CHROME_BROWSER_RENDERER_HOST_BROWSER_RENDER_PROCESS_HOST_H_