Implement suspend() and resume() for OfflineAudioContext

Source/modules/webaudio/AudioDestinationNode.cpp

 /*
  * Copyright (C) 2010, 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 77 matching lines @@
     context()->deferredTaskHandler().processAutomaticPullNodes(numberOfFrames);
 
     // Let the context take care of any business at the end of each render quantum.
     context()->handlePostRenderTasks();
 
     // Advance current sample-frame.
     size_t newSampleFrame = m_currentSampleFrame + numberOfFrames;
     releaseStore(&m_currentSampleFrame, newSampleFrame);
 }
 
+WebThread* AudioDestinationHandler::offlineRenderThread()
+{
+    ASSERT(context()->isOfflineContext());

[haraken, 2015/06/30 07:41:50]

ASSERT_NOT_REACHED() would be better.

[hongchan, 2015/06/30 18:52:10]

Done.

+    return nullptr;
+}
+
 // ----------------------------------------------------------------
 
 AudioDestinationNode::AudioDestinationNode(AudioContext& context)
     : AudioNode(context)
 {
 }
 
 AudioDestinationHandler& AudioDestinationNode::audioDestinationHandler() const
 {
     return static_cast<AudioDestinationHandler&>(handler());
 }
 
 unsigned long AudioDestinationNode::maxChannelCount() const
 {
     return audioDestinationHandler().maxChannelCount();
 }
 
 } // namespace blink
 
 #endif // ENABLE(WEB_AUDIO)