Split "Online" and "Offline" AudioContext processing

Source/modules/webaudio/ConvolverNode.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 109 matching lines @@
 
     // Wrap the AudioBuffer by an AudioBus. It's an efficient pointer set and not a memcpy().
     // This memory is simply used in the Reverb constructor and no reference to it is kept for later use in that class.
     RefPtr<AudioBus> bufferBus = AudioBus::create(numberOfChannels, bufferLength, false);
     for (unsigned i = 0; i < numberOfChannels; ++i)
         bufferBus->setChannelMemory(i, buffer->getChannelData(i)->data(), bufferLength);
 
     bufferBus->setSampleRate(buffer->sampleRate());
 
     // Create the reverb with the given impulse response.
-    bool useBackgroundThreads = !context()->isOfflineContext();
-    OwnPtr<Reverb> reverb = adoptPtr(new Reverb(bufferBus.get(), ProcessingSizeInFrames, MaxFFTSize, 2, useBackgroundThreads, m_normalize));
+    OwnPtr<Reverb> reverb = adoptPtr(new Reverb(bufferBus.get(), ProcessingSizeInFrames, MaxFFTSize, 2, context() && context()->hasRealtimeConstraint(), m_normalize));
 
     {
         // Synchronize with process().
         MutexLocker locker(m_processLock);
         m_reverb = reverb.release();
         m_buffer = buffer;
     }
 }
 
 AudioBuffer* ConvolverHandler::buffer()
@@ skipping 56 matching lines @@
 }
 
 void ConvolverNode::setNormalize(bool normalize)
 {
     convolverHandler().setNormalize(normalize);
 }
 
 } // namespace blink
 
 #endif // ENABLE(WEB_AUDIO)