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

third_party/WebKit/Source/modules/webmidi/MIDIMessageEvent.h

Index: third_party/WebKit/Source/modules/webmidi/MIDIMessageEvent.h
diff --git a/third_party/WebKit/Source/modules/webmidi/MIDIMessageEvent.h b/third_party/WebKit/Source/modules/webmidi/MIDIMessageEvent.h
index b8f036b8e4a843a8ff8c9a5a10becb70a2860cb5..d2c871dd9b076ce9d64a0e665b0a15bfd4c5ae6a 100644
--- a/third_party/WebKit/Source/modules/webmidi/MIDIMessageEvent.h
+++ b/third_party/WebKit/Source/modules/webmidi/MIDIMessageEvent.h
@@ -46,7 +46,7 @@
         return new MIDIMessageEvent();
     }
 
-    static MIDIMessageEvent* create(double receivedTime, DOMUint8Array* data)
+    static MIDIMessageEvent* create(double receivedTime, PassRefPtr<DOMUint8Array> data)
     {
         return new MIDIMessageEvent(receivedTime, data);
     }
@@ -57,21 +57,17 @@
     }
 
     double receivedTime() { return m_receivedTime; }
-    DOMUint8Array* data() { return m_data; }
+    PassRefPtr<DOMUint8Array> data() { return m_data; }
 
     const AtomicString& interfaceName() const override { return EventNames::MIDIMessageEvent; }
 
-    DEFINE_INLINE_VIRTUAL_TRACE()
-    {
-        visitor->trace(m_data);
-        Event::trace(visitor);
-    }
+    DEFINE_INLINE_VIRTUAL_TRACE() { Event::trace(visitor); }
 
 private:
     MIDIMessageEvent()
         : m_receivedTime(0) { }
 
-    MIDIMessageEvent(double receivedTime, DOMUint8Array* data)
+    MIDIMessageEvent(double receivedTime, PassRefPtr<DOMUint8Array> data)
         : Event(EventTypeNames::midimessage, true, false)
         , m_receivedTime(receivedTime)
         , m_data(data) { }
@@ -79,7 +75,7 @@
     MIDIMessageEvent(const AtomicString& type, const MIDIMessageEventInit& initializer);
 
     double m_receivedTime;
-    Member<DOMUint8Array> m_data;
+    RefPtr<DOMUint8Array> m_data;
 };
 
 } // namespace blink