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

Source/core/events/GestureEvent.h

Index: Source/core/events/GestureEvent.h
diff --git a/Source/core/events/GestureEvent.h b/Source/core/events/GestureEvent.h
index 0047edb24fdaa636b18c0416499b9237cc15112c..86f5a5d470a087bf5f2a2efbb1417d46bf1d871f 100644
--- a/Source/core/events/GestureEvent.h
+++ b/Source/core/events/GestureEvent.h
@@ -57,13 +57,13 @@ private:
 
 class GestureEventDispatchMediator FINAL : public EventDispatchMediator {
 public:
-    static PassRefPtr<GestureEventDispatchMediator> create(PassRefPtr<GestureEvent> gestureEvent)
+    static PassRefPtr<GestureEventDispatchMediator> create(PassRefPtrWillBeRawPtr<GestureEvent> gestureEvent)
     {
         return adoptRef(new GestureEventDispatchMediator(gestureEvent));
     }
 
 private:
-    explicit GestureEventDispatchMediator(PassRefPtr<GestureEvent>);
+    explicit GestureEventDispatchMediator(PassRefPtrWillBeRawPtr<GestureEvent>);
 
     GestureEvent* event() const;