Enable Oilpan by default for webaudio/

Source/modules/webaudio/ConvolverNode.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 20 matching lines @@
 #include "wtf/ThreadingPrimitives.h"
 
 namespace blink {
 
 class AudioBuffer;
 class ExceptionState;
 class Reverb;
 
 class ConvolverNode FINAL : public AudioNode {
 public:
-    static PassRefPtrWillBeRawPtr<ConvolverNode> create(AudioContext* context, float sampleRate)
+    static ConvolverNode* create(AudioContext* context, float sampleRate)
     {
-        return adoptRefWillBeNoop(new ConvolverNode(context, sampleRate));
+        return adoptRefCountedGarbageCollectedWillBeNoop(new ConvolverNode(context, sampleRate));
     }
 
     virtual ~ConvolverNode();
 
     // AudioNode
     virtual void dispose() OVERRIDE;
     virtual void process(size_t framesToProcess) OVERRIDE;
     virtual void initialize() OVERRIDE;
     virtual void uninitialize() OVERRIDE;
 
     // Impulse responses
     void setBuffer(AudioBuffer*, ExceptionState&);
     AudioBuffer* buffer();
 
     bool normalize() const { return m_normalize; }
     void setNormalize(bool normalize) { m_normalize = normalize; }
 
     virtual void trace(Visitor*) OVERRIDE;
 
 private:
     ConvolverNode(AudioContext*, float sampleRate);
 
     virtual double tailTime() const OVERRIDE;
     virtual double latencyTime() const OVERRIDE;
 
     OwnPtr<Reverb> m_reverb;
-    RefPtrWillBeMember<AudioBuffer> m_buffer;
+    Member<AudioBuffer> m_buffer;
 
     // This synchronizes dynamic changes to the convolution impulse response with process().
     mutable Mutex m_processLock;
 
     // Normalize the impulse response or not. Must default to true.
     bool m_normalize;
 };
 
 } // namespace blink
 
 #endif // ConvolverNode_h