Oilpan: Allocate all EventTarget derived types on the manged heap.

Source/modules/webmidi/MIDIPort.h

 /*
  * Copyright (C) 2013 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:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 25 matching lines @@
 #include "platform/heap/Handle.h"
 #include "wtf/RefCounted.h"
 #include "wtf/RefPtr.h"
 #include "wtf/Vector.h"
 
 namespace WebCore {
 
 class MIDIAccess;
 
 class MIDIPort : public RefCountedWillBeRefCountedGarbageCollected<MIDIPort>, public ScriptWrappable, public EventTargetWithInlineData {
-    DEFINE_EVENT_TARGET_REFCOUNTING(RefCountedWillBeRefCountedGarbageCollected<MIDIPort>);
+    REFCOUNTED_EVENT_TARGET(MIDIPort);
+    WILL_BE_USING_GARBAGE_COLLECTED_MIXIN(MIDIPort);
 public:
     enum MIDIPortTypeCode {
         MIDIPortTypeInput,
         MIDIPortTypeOutput
     };
 
     virtual ~MIDIPort() { }
 
     String id() const { return m_id; }
     String manufacturer() const { return m_manufacturer; }
     String name() const { return m_name; }
     String type() const;
     String version() const { return m_version; }
 
     MIDIAccess* midiAccess() const { return m_access; }
 
-    virtual void trace(Visitor*);
+    virtual void trace(Visitor*) OVERRIDE;
 
     DEFINE_ATTRIBUTE_EVENT_LISTENER(disconnect);
 
     // EventTarget
     virtual const AtomicString& interfaceName() const OVERRIDE { return EventTargetNames::MIDIPort; }
     virtual ExecutionContext* executionContext() const OVERRIDE FINAL;
 
 protected:
     MIDIPort(MIDIAccess*, const String& id, const String& manufacturer, const String& name, MIDIPortTypeCode, const String& version);
 
 private:
     String m_id;
     String m_manufacturer;
     String m_name;
     MIDIPortTypeCode m_type;
     String m_version;
     RawPtrWillBeMember<MIDIAccess> m_access;
 };
 
 } // namespace WebCore
 
 #endif // MIDIPort_h