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

Source/core/frame/DOMWindow.cpp

 /*
  * Copyright (C) 2006, 2007, 2008, 2010 Apple Inc. All rights reserved.
  * Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies)
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
@@ skipping 424 matching lines @@
     if (!m_eventQueue)
         return;
     event->setTarget(this);
     m_eventQueue->enqueueEvent(event);
 }
 
 void DOMWindow::enqueueDocumentEvent(PassRefPtrWillBeRawPtr<Event> event)
 {
     if (!m_eventQueue)
         return;
-    event->setTarget(m_document);
+    event->setTarget(m_document.get());
     m_eventQueue->enqueueEvent(event);
 }
 
 void DOMWindow::dispatchWindowLoadEvent()
 {
     ASSERT(!NoEventDispatchAssertion::isEventDispatchForbidden());
     dispatchLoadEvent();
 }
 
 void DOMWindow::documentWasClosed()
@@ skipping 1146 matching lines @@
     // the DOM.
     FrameOwner* owner = m_frame ? m_frame->owner() : 0;
     if (owner)
         owner->dispatchLoad();
 
     TRACE_EVENT_INSTANT1(TRACE_DISABLED_BY_DEFAULT("devtools.timeline"), "MarkLoad", "data", InspectorMarkLoadEvent::data(frame()));
     // FIXME(361045): remove InspectorInstrumentation calls once DevTools Timeline migrates to tracing.
     InspectorInstrumentation::loadEventFired(frame());
 }
 
-bool DOMWindow::dispatchEvent(PassRefPtrWillBeRawPtr<Event> prpEvent, PassRefPtr<EventTarget> prpTarget)
+bool DOMWindow::dispatchEvent(PassRefPtrWillBeRawPtr<Event> prpEvent, PassRefPtrWillBeRawPtr<EventTarget> prpTarget)
 {
     ASSERT(!NoEventDispatchAssertion::isEventDispatchForbidden());
 
-    RefPtr<EventTarget> protect = this;
+    RefPtrWillBeRawPtr<EventTarget> protect(this);
     RefPtrWillBeRawPtr<Event> event = prpEvent;
 
     event->setTarget(prpTarget ? prpTarget : this);
     event->setCurrentTarget(this);
     event->setEventPhase(Event::AT_TARGET);
 
     TRACE_EVENT1(TRACE_DISABLED_BY_DEFAULT("devtools.timeline"), "EventDispatch", "type", event->type().ascii());
     // FIXME(361045): remove InspectorInstrumentation calls once DevTools Timeline migrates to tracing.
     InspectorInstrumentationCookie cookie = InspectorInstrumentation::willDispatchEventOnWindow(frame(), *event, this);
 
@@ skipping 290 matching lines @@
     visitor->trace(m_sessionStorage);
     visitor->trace(m_localStorage);
     visitor->trace(m_applicationCache);
     visitor->trace(m_performance);
     visitor->trace(m_css);
     WillBeHeapSupplementable<DOMWindow>::trace(visitor);
     EventTargetWithInlineData::trace(visitor);
 }
 
 } // namespace WebCore