Merge 96020 - OfflineAudioDestinationNode must wait for thread completion in uninitialize()

Source/WebCore/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 51 matching lines @@
         return;
 
     AudioNode::initialize();
 }
 
 void OfflineAudioDestinationNode::uninitialize()
 {
     if (!isInitialized())
         return;
 
+    if (m_renderThread) {
+        waitForThreadCompletion(m_renderThread, 0);
+        m_renderThread = 0;
+    }
+
     AudioNode::uninitialize();
 }
 
 void OfflineAudioDestinationNode::startRendering()
 {
     ASSERT(isMainThread());
     ASSERT(m_renderTarget.get());
     if (!m_renderTarget.get())
         return;
     
@@ skipping 78 matching lines @@
 }
 
 void OfflineAudioDestinationNode::notifyComplete()
 {
     context()->fireCompletionEvent();
 }
 
 } // namespace WebCore
 
 #endif // ENABLE(WEB_AUDIO)