Remove extra memcpys from AudioPullFifo.

content/renderer/media/webrtc_local_audio_renderer.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/renderer/media/webrtc_local_audio_renderer.h"
 
 #include "base/debug/trace_event.h"
 #include "base/logging.h"
 #include "base/message_loop_proxy.h"
 #include "base/synchronization/lock.h"
 #include "content/renderer/media/audio_device_factory.h"
 #include "content/renderer/media/webrtc_audio_capturer.h"
 #include "media/audio/audio_output_device.h"
 #include "media/base/audio_bus.h"
+#include "media/base/audio_fifo.h"
 
 namespace content {
 
 // media::AudioRendererSink::RenderCallback implementation
 int WebRtcLocalAudioRenderer::Render(
     media::AudioBus* audio_bus, int audio_delay_milliseconds) {
   base::AutoLock auto_lock(thread_lock_);
 
   if (!playing_) {
     audio_bus->Zero();
@@ skipping 192 matching lines @@
   if (!sink_)
     return base::TimeDelta();
   return total_render_time();
 }
 
 bool WebRtcLocalAudioRenderer::IsLocalRenderer() const {
   return true;
 }
 
 }  // namespace content