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 179 matching lines @@
 }
 
 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_);
+  DCHECK_EQ(memory_length_,
+            media::AudioBus::CalculateMemorySize(audio_parameters_));
+  audio_bus_ = AudioBus::WrapMemory(audio_parameters_, shared_memory_.memory());
 }
 
 }  // namespace media.