WebAudio: Remove AudioNode::RefType.

Source/modules/webaudio/AudioNodeOutput.h

Index: Source/modules/webaudio/AudioNodeOutput.h
diff --git a/Source/modules/webaudio/AudioNodeOutput.h b/Source/modules/webaudio/AudioNodeOutput.h
index ade9c1c3350dbced00ad39f28ee870d246e7d95e..dee91da57fb29367a85ce70fb8fc6b0c2a2be4d4 100644
--- a/Source/modules/webaudio/AudioNodeOutput.h
+++ b/Source/modules/webaudio/AudioNodeOutput.h
@@ -136,6 +136,11 @@ private:
 
     HashSet<AudioNodeInput*> m_inputs;
     typedef HashSet<AudioNodeInput*>::iterator InputsIterator;
+    // The content of m_inputNodes should be synchronized with m_inputs.
+    // This RefPtr makes the node graph. We need to call AudioNode::
+    // wasConnected() after ref(), and call AudioNode::willBeDisconnected()
+    // before deref().
+    HashSet<RefPtr<AudioNode> > m_inputNodes;

[Raymond Toy, 2014/07/09 22:10:34]

What is this hash table for? Why is this needed now?

And m_inputNodes MUST be synchronized with m_inputs, right?

[tkent, 2014/07/10 08:07:42]

This holds connection references, and replaces manual ref()/deref().

Yes, MUST.

     bool m_isEnabled;
 
     // For the purposes of rendering, keeps track of the number of inputs and AudioParams we're connected to.