Remove tons of OILPAN.

sky/engine/core/animation/LegacyStyleInterpolation.h

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef LegacyStyleInterpolation_h
 #define LegacyStyleInterpolation_h
 
 #include "core/animation/StyleInterpolation.h"
 #include "core/css/resolver/AnimatedStyleBuilder.h"
 
@@ skipping 10 matching lines @@
     {
         AnimatedStyleBuilder::applyProperty(m_id, state, currentValue().get());
     }
 
     virtual bool isLegacyStyleInterpolation() const override final { return true; }
     PassRefPtr<AnimatableValue> currentValue() const
     {
         return toInterpolableAnimatableValue(m_cachedValue.get())->value();
     }
 
-    virtual void trace(Visitor* visitor) override
-    {
-        StyleInterpolation::trace(visitor);
-    }
-
 private:
     LegacyStyleInterpolation(PassOwnPtr<InterpolableValue> start, PassOwnPtr<InterpolableValue> end, CSSPropertyID id)
         : StyleInterpolation(start, end, id)
     {
     }
 };
 
 DEFINE_TYPE_CASTS(LegacyStyleInterpolation, Interpolation, value, value->isLegacyStyleInterpolation(), value.isLegacyStyleInterpolation());
 
 }
 
 #endif