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

Source/modules/webaudio/AudioNode.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 127 matching lines @@
 {
     m_nodeType = type;
 
 #if DEBUG_AUDIONODE_REFERENCES
     ++s_nodeCount[type];
 #endif
 }
 
 void AudioNode::addInput()
 {
-    m_inputs.append(AudioNodeInput::create(this));
+    m_inputs.append(AudioNodeInput::create(*this));
 }
 
 void AudioNode::addOutput(PassOwnPtr<AudioNodeOutput> output)
 {
     m_outputs.append(output);
 }
 
 AudioNodeInput* AudioNode::input(unsigned i)
 {
     if (i < m_inputs.size())
@@ skipping 36 matching lines @@
     }
 
     if (context() != destination->context()) {
         exceptionState.throwDOMException(
             SyntaxError,
             "cannot connect to a destination belonging to a different audio context.");
         return;
     }
 
     AudioNodeInput* input = destination->input(inputIndex);
-    AudioNodeOutput* output = this->output(outputIndex);
-    input->connect(output);
+    input->connect(*output(outputIndex));
 
     // Let context know that a connection has been made.
     context()->incrementConnectionCount();
 }
 
 void AudioNode::connect(AudioParam* param, unsigned outputIndex, ExceptionState& exceptionState)
 {
     ASSERT(isMainThread());
     AudioContext::AutoLocker locker(context());
 
@@ skipping 379 matching lines @@
     // it cannot be reattached. Therefore, the reference count
     // will not go above zero again.
     ASSERT(m_keepAlive);
     m_keepAlive = nullptr;
 }
 #endif
 
 } // namespace WebCore
 
 #endif // ENABLE(WEB_AUDIO)