Get rid of custom bindings for AudioBufferSourceNode.buffer setter

Source/modules/webaudio/AudioBufferSourceNode.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
  *    notice, this list of conditions and the following disclaimer in the
@@ skipping 34 matching lines @@
 class AudioBufferSourceNode : public AudioScheduledSourceNode {
 public:
     static PassRefPtr<AudioBufferSourceNode> create(AudioContext*, float sampleRate);
 
     virtual ~AudioBufferSourceNode();
 
     // AudioNode
     virtual void process(size_t framesToProcess);
     virtual void reset();
 
-    // setBuffer() is called on the main thread.  This is the buffer we use for playback.
-    // returns true on success.
-    bool setBuffer(AudioBuffer*);
+    // setBuffer() is called on the main thread. This is the buffer we use for playback.
+    void setBuffer(AudioBuffer*, ExceptionState&);
     AudioBuffer* buffer() { return m_buffer.get(); }
 
     // numberOfChannels() returns the number of output channels.  This value equals the number of channels from the buffer.
     // If a new buffer is set with a different number of channels, then this value will dynamically change.
     unsigned numberOfChannels();
 
     // Play-state
     void startGrain(double when, double grainOffset);
     void startGrain(double when, double grainOffset, double grainDuration);
 
@@ skipping 71 matching lines @@
     // the pitch rate. We manually manage ref-counting because we want to use RefTypeConnection.
     PannerNode* m_pannerNode;
 
     // This synchronizes process() with setBuffer() which can cause dynamic channel count changes.
     mutable Mutex m_processLock;
 };
 
 } // namespace WebCore
 
 #endif // AudioBufferSourceNode_h