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

Source/modules/webmidi/MIDIAccess.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 34 matching lines @@
 #include "platform/heap/Handle.h"
 #include "wtf/RefCounted.h"
 #include "wtf/RefPtr.h"
 #include "wtf/WeakPtr.h"
 
 namespace WebCore {
 
 class ExecutionContext;
 
 class MIDIAccess FINAL : public RefCountedWillBeRefCountedGarbageCollected<MIDIAccess>, public ScriptWrappable, public ActiveDOMObject, public EventTargetWithInlineData, public MIDIAccessorClient {
-    DEFINE_EVENT_TARGET_REFCOUNTING(RefCountedWillBeRefCountedGarbageCollected<MIDIAccess>);
+    REFCOUNTED_EVENT_TARGET(MIDIAccess);
+    WILL_BE_USING_GARBAGE_COLLECTED_MIXIN(MIDIAccess);
 public:
     virtual ~MIDIAccess();
     // Returns a promise object that will be resolved with this MIDIAccess.
     static ScriptPromise request(const MIDIOptions&, ScriptState*);
 
     MIDIInputVector inputs() const { return m_inputs; }
     MIDIOutputVector outputs() const { return m_outputs; }
 
     DEFINE_ATTRIBUTE_EVENT_LISTENER(connect);
     DEFINE_ATTRIBUTE_EVENT_LISTENER(disconnect);
@@ skipping 11 matching lines @@
 
     // MIDIAccessorClient
     virtual void didAddInputPort(const String& id, const String& manufacturer, const String& name, const String& version) OVERRIDE;
     virtual void didAddOutputPort(const String& id, const String& manufacturer, const String& name, const String& version) OVERRIDE;
     virtual void didStartSession(bool success, const String& error, const String& message) OVERRIDE;
     virtual void didReceiveMIDIData(unsigned portIndex, const unsigned char* data, size_t length, double timeStamp) OVERRIDE;
 
     // |timeStampInMilliseconds| is in the same time coordinate system as performance.now().
     void sendMIDIData(unsigned portIndex, const unsigned char* data, size_t length, double timeStampInMilliseconds);
 
-    void trace(Visitor*);
+    virtual void trace(Visitor*) OVERRIDE;
 
 private:
     class PostAction;
     enum State {
         Requesting,
         Resolved,
         Stopped,
     };
 
     MIDIAccess(const MIDIOptions&, ExecutionContext*);
@@ skipping 10 matching lines @@
     MIDIOutputVector m_outputs;
     OwnPtr<MIDIAccessor> m_accessor;
     MIDIOptions m_options;
     bool m_sysexEnabled;
     RefPtr<ScriptPromiseResolverWithContext> m_resolver;
 };
 
 } // namespace WebCore
 
 #endif // MIDIAccess_h