Make BrowserMessageFilter not derive from IPC::ChannelProxy::MessageFilter. This allows us to hide …

content/browser/renderer_host/media/audio_input_renderer_host.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.
 //
 // AudioInputRendererHost serves audio related requests from audio capturer
 // which lives inside the render process and provide access to audio hardware.
 //
 // Create stream sequence (AudioInputController = AIC):
 //
 // AudioInputHostMsg_CreateStream -> OnCreateStream -> AIC::CreateLowLatency ->
@@ skipping 61 matching lines @@
   virtual void OnCreated(media::AudioInputController* controller) OVERRIDE;
   virtual void OnRecording(media::AudioInputController* controller) OVERRIDE;
   virtual void OnError(media::AudioInputController* controller) OVERRIDE;
   virtual void OnData(media::AudioInputController* controller,
                       const uint8* data,
                       uint32 size) OVERRIDE;
 
  private:
   // TODO(henrika): extend test suite (compare AudioRenderHost)
   friend class BrowserThread;
+  friend class TestAudioInputRendererHost;
   friend class base::DeleteHelper<AudioInputRendererHost>;
 
   struct AudioEntry;
   typedef std::map<int, AudioEntry*> AudioEntryMap;
 
   virtual ~AudioInputRendererHost();
 
   // Methods called on IO thread ----------------------------------------------
 
   // Audio related IPC message handlers.
@@ skipping 66 matching lines @@
 
   // Raw pointer of the UserInputMonitor.
   media::UserInputMonitor* user_input_monitor_;
 
   DISALLOW_COPY_AND_ASSIGN(AudioInputRendererHost);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_RENDERER_HOST_MEDIA_AUDIO_INPUT_RENDERER_HOST_H_