Move BrowserMessageFilter to public, and into content namespace.

content/browser/renderer_host/media/audio_renderer_host.cc

 // Copyright (c) 2011 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_renderer_host.h"
 
 #include "base/bind.h"
 #include "base/metrics/histogram.h"
 #include "base/process.h"
 #include "base/shared_memory.h"
 #include "content/browser/renderer_host/media/audio_common.h"
 #include "content/browser/renderer_host/media/audio_sync_reader.h"
 #include "content/browser/renderer_host/media/media_observer.h"
 #include "content/browser/resource_context.h"
 #include "content/common/media/audio_messages.h"
 #include "media/audio/audio_util.h"
 #include "ipc/ipc_logging.h"
 
+using content::BrowserMessageFilter;
 using content::BrowserThread;
 
 AudioRendererHost::AudioEntry::AudioEntry()
     : stream_id(0),
       pending_buffer_request(false),
       pending_close(false) {
 }
 
 AudioRendererHost::AudioEntry::~AudioEntry() {}
 
@@ skipping 435 matching lines @@
   }
   return NULL;
 }
 
 MediaObserver* AudioRendererHost::media_observer() {
   DCHECK(BrowserThread::CurrentlyOn(BrowserThread::IO));
   if (!media_observer_)
     media_observer_ = resource_context_->media_observer();
   return media_observer_;
 }