Remove tons of OILPAN.

sky/engine/core/events/KeyboardEvent.cpp

Index: sky/engine/core/events/KeyboardEvent.cpp
diff --git a/sky/engine/core/events/KeyboardEvent.cpp b/sky/engine/core/events/KeyboardEvent.cpp
index ba756779dfdacca9f5b7f2b3cae3a5898a7128fd..99822ee86ecb30bd062d5f64d68920dc0f2b2a2a 100644
--- a/sky/engine/core/events/KeyboardEvent.cpp
+++ b/sky/engine/core/events/KeyboardEvent.cpp
@@ -207,11 +207,6 @@ int KeyboardEvent::which() const
     return keyCode();
 }
 
-void KeyboardEvent::trace(Visitor* visitor)
-{
-    UIEventWithKeyState::trace(visitor);
-}
-
 PassRefPtr<KeyboardEventDispatchMediator> KeyboardEventDispatchMediator::create(PassRefPtr<KeyboardEvent> event)
 {
     return adoptRef(new KeyboardEventDispatchMediator(event));