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

content/browser/renderer_host/media/audio_input_renderer_host.cc

 // 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.
 
 #include "content/browser/renderer_host/media/audio_input_renderer_host.h"
 
 #include "base/bind.h"
 #include "base/memory/shared_memory.h"
 #include "base/metrics/histogram.h"
 #include "base/process/process.h"
@@ skipping 45 matching lines @@
     : audio_manager_(audio_manager),
       media_stream_manager_(media_stream_manager),
       audio_mirroring_manager_(audio_mirroring_manager),
       user_input_monitor_(user_input_monitor) {}
 
 AudioInputRendererHost::~AudioInputRendererHost() {
   DCHECK(audio_entries_.empty());
 }
 
 void AudioInputRendererHost::OnChannelClosing() {
-  BrowserMessageFilter::OnChannelClosing();
-
   // Since the IPC channel is gone, close all requested audio streams.
   DeleteEntries();
 }
 
 void AudioInputRendererHost::OnDestruct() const {
   BrowserThread::DeleteOnIOThread::Destruct(this);
 }
 
 void AudioInputRendererHost::OnCreated(
     media::AudioInputController* controller) {
@@ skipping 324 matching lines @@
   // TODO(hclam): Implement a faster look up method.
   for (AudioEntryMap::iterator i = audio_entries_.begin();
        i != audio_entries_.end(); ++i) {
     if (controller == i->second->controller.get())
       return i->second;
   }
   return NULL;
 }
 
 }  // namespace content