Web Audio: Rename AudioParam class to AudioParamHandler.

Source/modules/webaudio/AudioNodeOutput.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 78 matching lines @@
     // updateRenderingState() is called in the audio thread at the start or end of the render quantum to handle any recent changes to the graph state.
     // It must be called with the context's graph lock.
     void updateRenderingState();
 
 private:
     AudioNodeOutput(AudioNode*, unsigned numberOfChannels);
 
     Member<AudioNode> m_node;
 
     friend class AudioNodeInput;
-    friend class AudioParam;
+    friend class AudioParamHandler;
 
     // These are called from AudioNodeInput.
     // They must be called with the context's graph lock.
     void addInput(AudioNodeInput&);
     void removeInput(AudioNodeInput&);
     void addParam(AudioParam&);
     void removeParam(AudioParam&);
 
     // fanOutCount() is the number of AudioNodeInputs that we're connected to.
     // This method should not be called in audio thread rendering code, instead renderingFanOutCount() should be used.
@@ skipping 47 matching lines @@
     // These value should only be changed at the very start or end of the rendering quantum.
     unsigned m_renderingFanOutCount;
     unsigned m_renderingParamFanOutCount;
 
     HeapHashSet<Member<AudioParam>> m_params;
 };
 
 } // namespace blink
 
 #endif // AudioNodeOutput_h