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

Source/core/events/EventDispatcher.cpp

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  *           (C) 2001 Dirk Mueller (mueller@kde.org)
  * Copyright (C) 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011 Apple Inc. All rights reserved.
  * Copyright (C) 2008 Nokia Corporation and/or its subsidiary(-ies)
  * Copyright (C) 2009 Torch Mobile Inc. All rights reserved. (http://www.torchmobile.com/)
  * Copyright (C) 2011 Google Inc. All rights reserved.
  *
  * This library is free software; you can redistribute it and/or
@@ skipping 31 matching lines @@
 bool EventDispatcher::dispatchEvent(Node* node, PassRefPtr<EventDispatchMediator> mediator)
 {
     TRACE_EVENT0("webkit", "EventDispatcher::dispatchEvent");
     ASSERT(!NoEventDispatchAssertion::isEventDispatchForbidden());
     if (!mediator->event())
         return true;
     EventDispatcher dispatcher(node, mediator->event());
     return mediator->dispatchEvent(&dispatcher);
 }
 
-EventDispatcher::EventDispatcher(Node* node, PassRefPtr<Event> event)
+EventDispatcher::EventDispatcher(Node* node, PassRefPtrWillBeRawPtr<Event> event)
     : m_node(node)
     , m_event(event)
 #ifndef NDEBUG
     , m_eventDispatched(false)
 #endif
 {
     ASSERT(node);
     ASSERT(m_event.get());
     ASSERT(!m_event->type().isNull()); // JavaScript code can create an event with an empty name, but not null.
     m_view = node->document().view();
@@ skipping 156 matching lines @@
         }
     }
 }
 
 const NodeEventContext* EventDispatcher::topNodeEventContext()
 {
     return m_event->eventPath().isEmpty() ? 0 : &m_event->eventPath().last();
 }
 
 }