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

Source/core/events/EventTarget.cpp

Index: Source/core/events/EventTarget.cpp
diff --git a/Source/core/events/EventTarget.cpp b/Source/core/events/EventTarget.cpp
index 7243a6ec75f6ddac686223fc914fde927cfc83a2..e91bdbb8f1517f2ee9422d73aae5da75e45d643c 100644
--- a/Source/core/events/EventTarget.cpp
+++ b/Source/core/events/EventTarget.cpp
@@ -153,7 +153,7 @@ bool EventTarget::clearAttributeEventListener(const AtomicString& eventType)
     return removeEventListener(eventType, listener, false);
 }
 
-bool EventTarget::dispatchEvent(PassRefPtr<Event> event, ExceptionState& exceptionState)
+bool EventTarget::dispatchEvent(PassRefPtrWillBeRawPtr<Event> event, ExceptionState& exceptionState)
 {
     if (!event) {
         exceptionState.throwDOMException(InvalidStateError, "The event provided is null.");
@@ -174,7 +174,7 @@ bool EventTarget::dispatchEvent(PassRefPtr<Event> event, ExceptionState& excepti
     return dispatchEvent(event);
 }
 
-bool EventTarget::dispatchEvent(PassRefPtr<Event> event)
+bool EventTarget::dispatchEvent(PassRefPtrWillBeRawPtr<Event> event)
 {
     event->setTarget(this);
     event->setCurrentTarget(this);