Implement IIRFilter node for WebAudio.

third_party/WebKit/Source/modules/webaudio/AudioNode.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 70 matching lines @@
         NodeTypePanner,
         NodeTypeStereoPanner,
         NodeTypeConvolver,
         NodeTypeDelay,
         NodeTypeGain,
         NodeTypeChannelSplitter,
         NodeTypeChannelMerger,
         NodeTypeAnalyser,
         NodeTypeDynamicsCompressor,
         NodeTypeWaveShaper,
+        NodeTypeIIRFilter,
         NodeTypeEnd
     };
 
     AudioHandler(NodeType, AudioNode&, float sampleRate);
     virtual ~AudioHandler();
     // dispose() is called when the owner AudioNode is about to be
     // destructed. This must be called in the main thread, and while the graph
     // lock is held.
     // Do not release resources used by an audio rendering thread in dispose().
     virtual void dispose();
@@ skipping 229 matching lines @@
     HeapVector<Member<HeapHashSet<Member<AudioNode>>>> m_connectedNodes;
     // Represents audio node graph with Oilpan references. N-th HeapHashSet
     // represents a set of AudioParam objects connected to this AudioNode's N-th
     // output.
     HeapVector<Member<HeapHashSet<Member<AudioParam>>>> m_connectedParams;
 };
 
 } // namespace blink
 
 #endif // AudioNode_h