WebAudio: Use references instead of pointers in AudioNodeInput and AudioNodeOutput.

Source/modules/webaudio/AudioParam.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
@@ skipping 157 matching lines @@
 {
     ASSERT(context()->isGraphOwner());
 
     ASSERT(output);
     if (!output)
         return;
 
     if (m_outputs.contains(output))
         return;
 
-    output->addParam(this);
+    output->addParam(*this);
     m_outputs.add(output);
     changedOutputs();
 }
 
 void AudioParam::disconnect(AudioNodeOutput* output)
 {
     ASSERT(context()->isGraphOwner());
 
     ASSERT(output);
     if (!output)
         return;
 
     if (m_outputs.contains(output)) {
         m_outputs.remove(output);
         changedOutputs();
-        output->removeParam(this);
+        output->removeParam(*this);
     }
 }
 
 } // namespace WebCore
 
 #endif // ENABLE(WEB_AUDIO)