Switch OnMoreData() to use AudioBus.

media/audio/audio_device_thread.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 "media/audio/audio_device_thread.h"
 
 #include <algorithm>
 
 #include "base/bind.h"
 #include "base/logging.h"
@@ skipping 174 matching lines @@
                     samples_per_ms_),
       shared_memory_(memory, false),
       memory_length_(memory_length) {
   CHECK_NE(bytes_per_ms_, 0);  // Catch division by zero early.
   CHECK_NE(samples_per_ms_, 0);
 }
 
 AudioDeviceThread::Callback::~Callback() {}
 
 void AudioDeviceThread::Callback::InitializeOnAudioThread() {
-  DCHECK(!audio_bus_.get());
-
   MapSharedMemory();
   DCHECK(shared_memory_.memory() != NULL);
-
-  // TODO(dalecurtis): Instead of creating a new AudioBus and memcpy'ing into
-  // the shared memory we should wrap the shared memory.
-  audio_bus_ = AudioBus::Create(audio_parameters_);
 }
 
 }  // namespace media.