Add ComputedStyle constructor and getter to InterpolationEnvironment

third_party/WebKit/Source/core/animation/CSSImageListInterpolationType.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 "core/animation/CSSImageListInterpolationType.h"
 
 #include "core/animation/CSSImageInterpolationType.h"
 #include "core/animation/ImageListPropertyFunctions.h"
 #include "core/animation/ListInterpolationFunctions.h"
 #include "core/css/CSSPrimitiveValue.h"
@@ skipping 112 matching lines @@
 }
 
 PairwiseInterpolationValue CSSImageListInterpolationType::maybeMergeSingles(InterpolationValue&& start, InterpolationValue&& end) const
 {
     return ListInterpolationFunctions::maybeMergeSingles(std::move(start), std::move(end), CSSImageInterpolationType::staticMergeSingleConversions);
 }
 
 InterpolationValue CSSImageListInterpolationType::maybeConvertUnderlyingValue(const InterpolationEnvironment& environment) const
 {
     StyleImageList underlyingImageList;
-    ImageListPropertyFunctions::getImageList(cssProperty(), *environment.state().style(), underlyingImageList);
+    ImageListPropertyFunctions::getImageList(cssProperty(), environment.style(), underlyingImageList);
     return maybeConvertStyleImageList(underlyingImageList);
 }
 
 void CSSImageListInterpolationType::composite(UnderlyingValueOwner& underlyingValueOwner, double underlyingFraction, const InterpolationValue& value, double interpolationFraction) const
 {
     underlyingValueOwner.set(*this, value);
 }
 
 void CSSImageListInterpolationType::apply(const InterpolableValue& interpolableValue, const NonInterpolableValue* nonInterpolableValue, InterpolationEnvironment& environment) const
 {
     const InterpolableList& interpolableList = toInterpolableList(interpolableValue);
     const size_t length = interpolableList.length();
     ASSERT(length > 0);
     const NonInterpolableList& nonInterpolableList = toNonInterpolableList(*nonInterpolableValue);
     ASSERT(nonInterpolableList.length() == length);
     StyleImageList imageList(length);
     for (size_t i = 0; i < length; i++)
         imageList[i] = CSSImageInterpolationType::resolveStyleImage(cssProperty(), *interpolableList.get(i), nonInterpolableList.get(i), environment.state());
-    ImageListPropertyFunctions::setImageList(cssProperty(), *environment.state().style(), imageList);
+    ImageListPropertyFunctions::setImageList(cssProperty(), environment.style(), imageList);
 }
 
 } // namespace blink