Revert of Move DOMArrayBuffer, DOMArrayBufferViews and DataView to the heap.

third_party/WebKit/Source/modules/webaudio/AudioBuffer.h

Index: third_party/WebKit/Source/modules/webaudio/AudioBuffer.h
diff --git a/third_party/WebKit/Source/modules/webaudio/AudioBuffer.h b/third_party/WebKit/Source/modules/webaudio/AudioBuffer.h
index ec8ebfec369b2810b906c095e0348c53ef109a01..06f0519cc8fa715cc772b2f5d01e17cc6da0f9ba 100644
--- a/third_party/WebKit/Source/modules/webaudio/AudioBuffer.h
+++ b/third_party/WebKit/Source/modules/webaudio/AudioBuffer.h
@@ -60,7 +60,7 @@
 
     // Channel data access
     unsigned numberOfChannels() const { return m_channels.size(); }
-    DOMFloat32Array* getChannelData(unsigned channelIndex, ExceptionState&);
+    PassRefPtr<DOMFloat32Array> getChannelData(unsigned channelIndex, ExceptionState&);
     DOMFloat32Array* getChannelData(unsigned channelIndex);
     void copyFromChannel(DOMFloat32Array*, long channelNumber, ExceptionState&);
     void copyFromChannel(DOMFloat32Array*, long channelNumber, unsigned long startInChannel, ExceptionState&);
@@ -69,13 +69,10 @@
 
     void zero();
 
-    DEFINE_INLINE_TRACE()
-    {
-        visitor->trace(m_channels);
-    }
+    DEFINE_INLINE_TRACE() { }
 
 private:
-    static DOMFloat32Array* createFloat32ArrayOrNull(size_t length);
+    static PassRefPtr<DOMFloat32Array> createFloat32ArrayOrNull(size_t length);
 
 protected:
     AudioBuffer(unsigned numberOfChannels, size_t numberOfFrames, float sampleRate);
@@ -85,7 +82,7 @@
     float m_sampleRate;
     size_t m_length;
 
-    HeapVector<Member<DOMFloat32Array>> m_channels;
+    Vector<RefPtr<DOMFloat32Array>> m_channels;
 };
 
 } // namespace blink