Remove tons of OILPAN.

sky/engine/core/animation/Keyframe.h

Index: sky/engine/core/animation/Keyframe.h
diff --git a/sky/engine/core/animation/Keyframe.h b/sky/engine/core/animation/Keyframe.h
index 38ee1c4e584cf19a3c5d40d73a9908de5ca98c48..b54f4a32d8194a35e2c4f8d293e71252f9b4c6e1 100644
--- a/sky/engine/core/animation/Keyframe.h
+++ b/sky/engine/core/animation/Keyframe.h
@@ -48,8 +48,6 @@ public:
     virtual bool isAnimatableValueKeyframe() const { return false; }
     virtual bool isStringKeyframe() const { return false; }
 
-    virtual void trace(Visitor*) { }
-
     class PropertySpecificKeyframe {
     public:
         virtual ~PropertySpecificKeyframe() { }
@@ -66,8 +64,6 @@ public:
         virtual PassOwnPtr<PropertySpecificKeyframe> neutralKeyframe(double offset, PassRefPtr<TimingFunction> easing) const = 0;
         virtual PassRefPtr<Interpolation> createInterpolation(CSSPropertyID, blink::Keyframe::PropertySpecificKeyframe* end, Element*) const = 0;
 
-        virtual void trace(Visitor*) { }
-
     protected:
         PropertySpecificKeyframe(double offset, PassRefPtr<TimingFunction> easing, AnimationEffect::CompositeOperation);