Oilpan: Remove ref counting from EventTarget and all uses of Pass/RefPtr<EventTarget>.

Source/core/html/ime/InputMethodContext.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 @@
 class ExecutionContext;
 class InputMethodController;
 class Node;
 
 class InputMethodContext FINAL : public NoBaseWillBeRefCountedGarbageCollected<InputMethodContext>, public ScriptWrappable, public EventTargetWithInlineData {
     WILL_BE_USING_GARBAGE_COLLECTED_MIXIN(InputMethodContext);
 public:
     static PassOwnPtrWillBeRawPtr<InputMethodContext> create(HTMLElement*);
     virtual ~InputMethodContext();
 
-#if ENABLE(OILPAN)
-    using RefCountedGarbageCollected<InputMethodContext>::ref;
-    using RefCountedGarbageCollected<InputMethodContext>::deref;
-#else
+#if !ENABLE(OILPAN)
     void ref() { m_element->ref(); }
     void deref() { m_element->deref(); }
 #endif
 
     String locale() const;
     HTMLElement* target() const;
     unsigned compositionStartOffset();
     unsigned compositionEndOffset();
     void confirmComposition();
 
@@ skipping 14 matching lines @@
     void dispatchCandidateWindowHideEvent();
 
     virtual void trace(Visitor*) OVERRIDE;
 
 private:
     InputMethodContext(HTMLElement*);
     bool hasFocus() const;
     CompositionUnderline selectedSegment() const;
     InputMethodController& inputMethodController() const;
 
+#if !ENABLE(OILPAN)
     virtual void refEventTarget() OVERRIDE { ref(); }
     virtual void derefEventTarget() OVERRIDE { deref(); }
+#endif
 
     RawPtrWillBeMember<HTMLElement> m_element;
     Vector<unsigned> m_segments;
 };
 
 } // namespace WebCore
 
 #endif // InputMethodContext_h