Remove tons of OILPAN.

sky/engine/core/events/GestureEvent.h

Index: sky/engine/core/events/GestureEvent.h
diff --git a/sky/engine/core/events/GestureEvent.h b/sky/engine/core/events/GestureEvent.h
index 0ac314cba49e0c28eb24f9f0af79c2c1ce323826..9ba35da318549062f097d8c966554963e38a8db2 100644
--- a/sky/engine/core/events/GestureEvent.h
+++ b/sky/engine/core/events/GestureEvent.h
@@ -45,8 +45,6 @@ public:
     float deltaX() const { return m_deltaX; }
     float deltaY() const { return m_deltaY; }
 
-    virtual void trace(Visitor*) override;
-
 private:
     GestureEvent();
     GestureEvent(const AtomicString& type, PassRefPtr<AbstractView>, int screenX, int screenY, int clientX, int clientY, bool ctrlKey, bool altKey, bool shiftKey, bool metaKey, float deltaX, float deltaY);