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

Source/core/events/KeyboardEvent.cpp

Index: Source/core/events/KeyboardEvent.cpp
diff --git a/Source/core/events/KeyboardEvent.cpp b/Source/core/events/KeyboardEvent.cpp
index fbcf2f9a820ad559d191093a91f99c981d99f9eb..1a18c41664a4db6bec3f80eee23a14b9ccdaafaf 100644
--- a/Source/core/events/KeyboardEvent.cpp
+++ b/Source/core/events/KeyboardEvent.cpp
@@ -221,12 +221,12 @@ void KeyboardEvent::trace(Visitor* visitor)
     UIEventWithKeyState::trace(visitor);
 }
 
-PassRefPtr<KeyboardEventDispatchMediator> KeyboardEventDispatchMediator::create(PassRefPtr<KeyboardEvent> event)
+PassRefPtr<KeyboardEventDispatchMediator> KeyboardEventDispatchMediator::create(PassRefPtrWillBeRawPtr<KeyboardEvent> event)
 {
     return adoptRef(new KeyboardEventDispatchMediator(event));
 }
 
-KeyboardEventDispatchMediator::KeyboardEventDispatchMediator(PassRefPtr<KeyboardEvent> event)
+KeyboardEventDispatchMediator::KeyboardEventDispatchMediator(PassRefPtrWillBeRawPtr<KeyboardEvent> event)
     : EventDispatchMediator(event)
 {
 }