Web Audio: Unapply Oilpan to AudioSummingJunction.

Source/modules/webaudio/AudioNodeInput.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 21 matching lines @@
 
 namespace blink {
 
 class AudioNode;
 class AudioNodeOutput;
 
 // An AudioNodeInput represents an input to an AudioNode and can be connected from one or more AudioNodeOutputs.
 // In the case of multiple connections, the input will act as a unity-gain summing junction, mixing all the outputs.
 // The number of channels of the input's bus is the maximum of the number of channels of all its connections.
 
-class AudioNodeInput final : public AudioSummingJunction {
+class AudioNodeInput final : public GarbageCollectedFinalized<AudioNodeInput>, public AudioSummingJunction {
 public:
     static AudioNodeInput* create(AudioNode&);
+    DECLARE_TRACE();
 
     // AudioSummingJunction
-    DECLARE_VIRTUAL_TRACE();
     virtual void didUpdate() override;
 
     // Can be called from any thread.
     AudioNode& node() const { return *m_node; }
 
     // Must be called with the context's graph lock.
     void connect(AudioNodeOutput&);
     void disconnect(AudioNodeOutput&);
 
     // disable() will take the output out of the active connections list and set aside in a disabled list.
@@ skipping 36 matching lines @@
     // Called from context's audio thread.
     AudioBus* internalSummingBus();
     void sumAllConnections(AudioBus* summingBus, size_t framesToProcess);
 
     RefPtr<AudioBus> m_internalSummingBus;
 };
 
 } // namespace blink
 
 #endif // AudioNodeInput_h