Allow audio system to handle synchronized low-latency audio I/O

content/renderer/pepper/pepper_platform_audio_output_impl.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/pepper/pepper_platform_audio_output_impl.h"
 
 #include "base/bind.h"
 #include "base/logging.h"
 #include "base/message_loop_proxy.h"
 #include "build/build_config.h"
@@ skipping 126 matching lines @@
   ChildProcess::current()->io_message_loop()->PostTask(
       FROM_HERE,
       base::Bind(&PepperPlatformAudioOutputImpl::InitializeOnIOThread,
                  this, params));
   return true;
 }
 
 void PepperPlatformAudioOutputImpl::InitializeOnIOThread(
     const media::AudioParameters& params) {
   stream_id_ = ipc_->AddDelegate(this);
-  ipc_->CreateStream(stream_id_, params);
+  ipc_->CreateStream(stream_id_, params, 0);
 }
 
 void PepperPlatformAudioOutputImpl::StartPlaybackOnIOThread() {
   if (stream_id_)
     ipc_->PlayStream(stream_id_);
 }
 
 void PepperPlatformAudioOutputImpl::StopPlaybackOnIOThread() {
   if (stream_id_)
     ipc_->PauseStream(stream_id_);
 }
 
 void PepperPlatformAudioOutputImpl::ShutDownOnIOThread() {
   // Make sure we don't call shutdown more than once.
   if (!stream_id_)
     return;
 
   ipc_->CloseStream(stream_id_);
   ipc_->RemoveDelegate(stream_id_);
   stream_id_ = 0;
 
   Release();  // Release for the delegate, balances out the reference taken in
               // PepperPluginDelegateImpl::CreateAudio.
 }
 
 }  // namespace content