Oilpan: Unship oilpan from temporary animation objects

Source/core/animation/ImageStyleInterpolation.cpp

 // Copyright 2015 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/ImageStyleInterpolation.h"
 
 #include "core/css/resolver/StyleBuilder.h"
 
 
@@ skipping 14 matching lines @@
     if (cachedValue >= 1.0) {
         StyleBuilder::applyProperty(m_id, state, m_finalImage.get());
         return;
     }
     RefPtrWillBeRawPtr<CSSCrossfadeValue> crossfadeValue = CSSCrossfadeValue::create(m_initialImage, m_finalImage);
     crossfadeValue->setPercentage(CSSPrimitiveValue::create(cachedValue, CSSPrimitiveValue::UnitType::Number));
 
     StyleBuilder::applyProperty(m_id, state, crossfadeValue.get());
 }
 
-DEFINE_TRACE(ImageStyleInterpolation)
-{
-    visitor->trace(m_initialImage);
-    visitor->trace(m_finalImage);
-    StyleInterpolation::trace(visitor);
-}
-
 } // namespace blink