Require use of AudioBus::create() to avoid ref-counting issues

Source/modules/webaudio/OfflineAudioDestinationNode.cpp

 /*
  * Copyright (C) 2011, Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1.  Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2.  Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
@@ skipping 28 matching lines @@
 namespace WebCore {
     
 const size_t renderQuantumSize = 128;    
 
 OfflineAudioDestinationNode::OfflineAudioDestinationNode(AudioContext* context, AudioBuffer* renderTarget)
     : AudioDestinationNode(context, renderTarget->sampleRate())
     , m_renderTarget(renderTarget)
     , m_renderThread(0)
     , m_startedRendering(false)
 {
-    m_renderBus = adoptRef(new AudioBus(renderTarget->numberOfChannels(), renderQuantumSize));
+    m_renderBus = AudioBus::create(renderTarget->numberOfChannels(), renderQuantumSize);
 }
 
 OfflineAudioDestinationNode::~OfflineAudioDestinationNode()
 {
     uninitialize();
 }
 
 void OfflineAudioDestinationNode::initialize()
 {
     if (isInitialized())
@@ skipping 101 matching lines @@
 }
 
 void OfflineAudioDestinationNode::notifyComplete()
 {
     context()->fireCompletionEvent();
 }
 
 } // namespace WebCore
 
 #endif // ENABLE(WEB_AUDIO)