Move webaudio to oilpan

Source/modules/webaudio/AudioBuffer.h

Index: Source/modules/webaudio/AudioBuffer.h
diff --git a/Source/modules/webaudio/AudioBuffer.h b/Source/modules/webaudio/AudioBuffer.h
index a7627bed7c57625d07a046809c4665ad74a56381..bb2bd7ea1b63c05dc79bbcb078343ef96532baca 100644
--- a/Source/modules/webaudio/AudioBuffer.h
+++ b/Source/modules/webaudio/AudioBuffer.h
@@ -41,12 +41,14 @@ namespace WebCore {
 class AudioBus;
 class ExceptionState;
 
-class AudioBuffer : public ScriptWrappable, public RefCounted<AudioBuffer> {
+class AudioBuffer : public RefCountedWillBeGarbageCollectedFinalized<AudioBuffer>, public ScriptWrappable {
 public:
-    static PassRefPtr<AudioBuffer> create(unsigned numberOfChannels, size_t numberOfFrames, float sampleRate);
+    static PassRefPtrWillBeRawPtr<AudioBuffer> create(unsigned numberOfChannels, size_t numberOfFrames, float sampleRate);
 
     // Returns 0 if data is not a valid audio file.
-    static PassRefPtr<AudioBuffer> createFromAudioFileData(const void* data, size_t dataSize, bool mixToMono, float sampleRate);
+    static PassRefPtrWillBeRawPtr<AudioBuffer> createFromAudioFileData(const void* data, size_t dataSize, bool mixToMono, float sampleRate);
+
+    static PassRefPtrWillBeRawPtr<AudioBuffer> createFromAudioBus(AudioBus*);
 
     // Format
     size_t length() const { return m_length; }
@@ -61,6 +63,9 @@ public:
 
     static float minAllowedSampleRate();
     static float maxAllowedSampleRate();
+
+    void trace(Visitor*) { }

[Ken Russell (switch to Gerrit), 2014/05/07 22:07:20]

Just confirming -- it isn't necessary to do anything with the m_channels array?
Each element is still a RefPtr, and none of those objects are exposed directly
to JavaScript, even via getChannelData.

[haraken, 2014/05/08 00:52:09]

m_channels is not on heap, so we don't need to trace it. We just need to trace
on-heap things such as Member and HeapVector.

We'll move Float32Array to the heap at some point and trace it.

+
 protected:
     AudioBuffer(unsigned numberOfChannels, size_t numberOfFrames, float sampleRate);
     explicit AudioBuffer(AudioBus*);