Remove tons of OILPAN.

sky/engine/core/animation/LengthStyleInterpolation.cpp

 // 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.
 
 #include "config.h"
 #include "core/animation/LengthStyleInterpolation.h"
 
 #include "core/css/CSSCalculationValue.h"
 #include "core/css/resolver/StyleBuilder.h"
 
@@ skipping 83 matching lines @@
     default:
         return CSSPrimitiveValue::create(CSSCalcValue::create(constructCalcExpression(nullptr, listValue, 0), range));
     }
 }
 
 void LengthStyleInterpolation::apply(StyleResolverState& state) const
 {
     StyleBuilder::applyProperty(m_id, state, interpolableValueToLength(m_cachedValue.get(), m_range).get());
 }
 
-void LengthStyleInterpolation::trace(Visitor* visitor)
-{
-    StyleInterpolation::trace(visitor);
 }
-
-}