Make IDL Callbacks non-refcounted by default

Source/modules/webaudio/AudioContext.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 343 matching lines @@
             SyntaxError,
             ExceptionMessages::failedToConstruct(
                 "AudioBuffer",
                 "invalid audio data in ArrayBuffer."));
         return 0;
     }
 
     return audioBuffer;
 }
 
-void AudioContext::decodeAudioData(ArrayBuffer* audioData, PassRefPtr<AudioBufferCallback> successCallback, PassRefPtr<AudioBufferCallback> errorCallback, ExceptionState& exceptionState)
+void AudioContext::decodeAudioData(ArrayBuffer* audioData, PassOwnPtr<AudioBufferCallback> successCallback, PassOwnPtr<AudioBufferCallback> errorCallback, ExceptionState& exceptionState)
 {
     if (!audioData) {
         exceptionState.throwDOMException(
             SyntaxError,
             ExceptionMessages::failedToExecute(
                 "decodeAudioData",
                 "AudioContext",
                 "invalid ArrayBuffer for audioData."));
         return;
     }
@@ skipping 727 matching lines @@
 }
 
 void AudioContext::decrementActiveSourceCount()
 {
     atomicDecrement(&m_activeSourceCount);
 }
 
 } // namespace WebCore
 
 #endif // ENABLE(WEB_AUDIO)