Ensure that ArrayBuffers actively being used by the Web Audio API cannot be neutered

Source/modules/webaudio/AudioBuffer.h

 /*
  * 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
@@ skipping 37 matching lines @@
     // Returns 0 if data is not a valid audio file.
     static PassRefPtr<AudioBuffer> createFromAudioFileData(const void* data, size_t dataSize, bool mixToMono, float sampleRate);
 
     // Format
     size_t length() const { return m_length; }
     double duration() const { return length() / sampleRate(); }
     float sampleRate() const { return m_sampleRate; }
 
     // Channel data access
     unsigned numberOfChannels() const { return m_channels.size(); }
-    Float32Array* getChannelData(unsigned channelIndex, ExceptionState&);
+    PassRefPtr<Float32Array> getChannelData(unsigned channelIndex, ExceptionState&);
     Float32Array* getChannelData(unsigned channelIndex);
     void zero();
 
     // Scalar gain
     double gain() const { return m_gain; }
     void setGain(double gain) { m_gain = gain; }
 
     // Because an AudioBuffer has a JavaScript wrapper, which will be garbage collected, it may take awhile for this object to be deleted.
     // releaseMemory() can be called when the AudioContext goes away, so we can release the memory earlier than when the garbage collection happens.
     // Careful! Only call this when the page unloads, after the AudioContext is no longer processing.
     void releaseMemory();
     
 protected:
     AudioBuffer(unsigned numberOfChannels, size_t numberOfFrames, float sampleRate);
     explicit AudioBuffer(AudioBus*);
 
     double m_gain; // scalar gain
     float m_sampleRate;
     size_t m_length;
 
     Vector<RefPtr<Float32Array> > m_channels;
 };
 
 } // namespace WebCore
 
 #endif // AudioBuffer_h