Remove tons of OILPAN.

sky/engine/core/animation/animatable/AnimatableLengthBoxAndBool.cpp

 /*
  * Copyright (C) 2013 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 40 matching lines @@
     }
     return defaultInterpolateTo(this, value, fraction);
 }
 
 bool AnimatableLengthBoxAndBool::equalTo(const AnimatableValue* value) const
 {
     const AnimatableLengthBoxAndBool* lengthBox = toAnimatableLengthBoxAndBool(value);
     return box()->equals(lengthBox->box()) && flag() == lengthBox->flag();
 }
 
-void AnimatableLengthBoxAndBool::trace(Visitor* visitor)
-{
-    visitor->trace(m_box);
-    AnimatableValue::trace(visitor);
 }
-
-}