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

Source/core/platform/audio/AudioPullFIFO.cpp

 /*
  * Copyright (C) 2012 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
@@ skipping 20 matching lines @@
 #if ENABLE(WEB_AUDIO)
 
 #include "core/platform/audio/AudioPullFIFO.h"
 
 namespace WebCore {
 
 AudioPullFIFO::AudioPullFIFO(AudioSourceProvider& audioProvider, unsigned numberOfChannels, size_t fifoLength, size_t providerSize)
     : m_provider(audioProvider)
     , m_fifo(numberOfChannels, fifoLength)
     , m_providerSize(providerSize)
-    , m_tempBus(numberOfChannels, providerSize)
+    , m_tempBus(AudioBus::create(numberOfChannels, providerSize))
 {
 }
 
 void AudioPullFIFO::consume(AudioBus* destination, size_t framesToConsume)
 {
     if (!destination)
         return;
 
     if (framesToConsume > m_fifo.framesInFifo()) {
         // We don't have enough data in the FIFO to fulfill the request. Ask for more data.
         fillBuffer(framesToConsume - m_fifo.framesInFifo());
     }
 
     m_fifo.consume(destination, framesToConsume);
 }
 
 void AudioPullFIFO::fillBuffer(size_t numberOfFrames)
 {
     // Keep asking the provider to give us data until we have received at least |numberOfFrames| of
     // data. Stuff the data into the FIFO.
     size_t framesProvided = 0;
 
     while (framesProvided < numberOfFrames) {
-        m_provider.provideInput(&m_tempBus, m_providerSize);
+        m_provider.provideInput(m_tempBus.get(), m_providerSize);
 
-        m_fifo.push(&m_tempBus);
+        m_fifo.push(m_tempBus.get());
 
         framesProvided += m_providerSize;
     }
 }
 
 } // namespace WebCore
 
 #endif // ENABLE(WEB_AUDIO)