Enable Oilpan by default for webaudio/

Source/modules/webaudio/AnalyserNode.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 17 matching lines @@
 #include "modules/webaudio/AudioBasicInspectorNode.h"
 #include "modules/webaudio/RealtimeAnalyser.h"
 #include "wtf/Forward.h"
 
 namespace blink {
 
 class ExceptionState;
 
 class AnalyserNode FINAL : public AudioBasicInspectorNode {
 public:
-    static PassRefPtrWillBeRawPtr<AnalyserNode> create(AudioContext* context, float sampleRate)
+    static AnalyserNode* create(AudioContext* context, float sampleRate)
     {
-        return adoptRefWillBeNoop(new AnalyserNode(context, sampleRate));
+        return adoptRefCountedGarbageCollectedWillBeNoop(new AnalyserNode(context, sampleRate));
     }
 
     virtual ~AnalyserNode();
 
     // AudioNode
     virtual void dispose() OVERRIDE;
     virtual void process(size_t framesToProcess) OVERRIDE;
 
     // Javascript bindings
     unsigned fftSize() const { return m_analyser.fftSize(); }
@@ skipping 19 matching lines @@
     virtual double latencyTime() const OVERRIDE { return 0; }
 
     AnalyserNode(AudioContext*, float sampleRate);
 
     RealtimeAnalyser m_analyser;
 };
 
 } // namespace blink
 
 #endif // AnalyserNode_h