Enable Oilpan by default for webaudio/

Source/modules/webaudio/OscillatorNode.h

 /*
  * Copyright (C) 2012, 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 34 matching lines @@
     // The waveform type.
     // These must be defined as in the .idl file.
     enum {
         SINE = 0,
         SQUARE = 1,
         SAWTOOTH = 2,
         TRIANGLE = 3,
         CUSTOM = 4
     };
 
-    static PassRefPtrWillBeRawPtr<OscillatorNode> create(AudioContext*, float sampleRate);
+    static OscillatorNode* create(AudioContext*, float sampleRate);
 
     virtual ~OscillatorNode();
 
     // AudioNode
     virtual void dispose() OVERRIDE;
     virtual void process(size_t framesToProcess) OVERRIDE;
 
     String type() const;
 
     void setType(const String&);
@@ skipping 12 matching lines @@
 
     // Returns true if there are sample-accurate timeline parameter changes.
     bool calculateSampleAccuratePhaseIncrements(size_t framesToProcess);
 
     virtual bool propagatesSilence() const OVERRIDE;
 
     // One of the waveform types defined in the enum.
     unsigned short m_type;
 
     // Frequency value in Hertz.
-    RefPtrWillBeMember<AudioParam> m_frequency;
+    Member<AudioParam> m_frequency;
 
     // Detune value (deviating from the frequency) in Cents.
-    RefPtrWillBeMember<AudioParam> m_detune;
+    Member<AudioParam> m_detune;
 
     bool m_firstRender;
 
     // m_virtualReadIndex is a sample-frame index into our buffer representing the current playback position.
     // Since it's floating-point, it has sub-sample accuracy.
     double m_virtualReadIndex;
 
     // This synchronizes process().
     mutable Mutex m_processLock;
 
     // Stores sample-accurate values calculated according to frequency and detune.
     AudioFloatArray m_phaseIncrements;
     AudioFloatArray m_detuneValues;
 
-    RefPtrWillBeMember<PeriodicWave> m_periodicWave;
+    Member<PeriodicWave> m_periodicWave;
 };
 
 } // namespace blink
 
 #endif // OscillatorNode_h