Land Henrik's patch: http://codereview.chromium.org/6721027/

content/renderer/renderer_webaudiodevice_impl.cc

 // Copyright (c) 2010 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/renderer_webaudiodevice_impl.h"
 
 using WebKit::WebAudioDevice;
 using WebKit::WebVector;
 
 RendererWebAudioDeviceImpl::RendererWebAudioDeviceImpl(size_t buffer_size,
     int channels, double sample_rate, WebAudioDevice::RenderCallback* callback)
     : client_callback_(callback) {
-  audio_device_.reset(
-      new AudioDevice(buffer_size, channels, sample_rate, this));
+  audio_device_ = new AudioDevice(buffer_size, channels, sample_rate, this);
 }
 
 RendererWebAudioDeviceImpl::~RendererWebAudioDeviceImpl() {
   stop();
 }
 
 void RendererWebAudioDeviceImpl::start() {
   audio_device_->Start();
 }
 
 void RendererWebAudioDeviceImpl::stop() {
   audio_device_->Stop();
 }
 
-double RendererWebAudioDeviceImpl::sampleRate()
-{
+double RendererWebAudioDeviceImpl::sampleRate() {
   return 44100.0;
 }
 
 void RendererWebAudioDeviceImpl::Render(const std::vector<float*>& audio_data,
-                                size_t number_of_frames) {
+                                size_t number_of_frames,
+                                size_t audio_delay_milliseconds) {
   // Make the client callback to get rendered audio.
   DCHECK(client_callback_);
   if (client_callback_) {
     // Wrap the pointers using WebVector.
     WebVector<float*> web_audio_data(audio_data.size());
     for (size_t i = 0; i < audio_data.size(); ++i)
       web_audio_data[i] = audio_data[i];
 
     client_callback_->render(web_audio_data, number_of_frames);
   }
 }