Oilpan: Replace most of RefPtrs for Event objects with oilpan's transition types

Source/core/events/GestureEvent.cpp

 /*
  * Copyright (C) 2012 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 copyright
  *    notice, this list of conditions and the following disclaimer in the
@@ skipping 81 matching lines @@
     , m_deltaX(deltaX)
     , m_deltaY(deltaY)
 {
 }
 
 void GestureEvent::trace(Visitor* visitor)
 {
     MouseRelatedEvent::trace(visitor);
 }
 
-GestureEventDispatchMediator::GestureEventDispatchMediator(PassRefPtr<GestureEvent> gestureEvent)
+GestureEventDispatchMediator::GestureEventDispatchMediator(PassRefPtrWillBeRawPtr<GestureEvent> gestureEvent)
     : EventDispatchMediator(gestureEvent)
 {
 }
 
 GestureEvent* GestureEventDispatchMediator::event() const
 {
     return toGestureEvent(EventDispatchMediator::event());
 }
 
 bool GestureEventDispatchMediator::dispatchEvent(EventDispatcher* dispatcher) const
 {
     dispatcher->dispatch();
     ASSERT(!event()->defaultPrevented());
     return event()->defaultHandled() || event()->defaultPrevented();
 }
 
 } // namespace WebCore