Add ComputedStyle constructor and getter to InterpolationEnvironment

third_party/WebKit/Source/core/animation/CSSColorInterpolationType.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/CSSColorInterpolationType.h"
 
 #include "core/animation/ColorPropertyFunctions.h"
 #include "core/css/CSSColorValue.h"
 #include "core/css/resolver/StyleResolverState.h"
 #include "core/layout/LayoutTheme.h"
@@ skipping 191 matching lines @@
 {
     std::unique_ptr<InterpolableList> colorPair = InterpolableList::create(InterpolableColorPairIndexCount);
     colorPair->set(Unvisited, createInterpolableColor(unvisitedColor));
     colorPair->set(Visited, createInterpolableColor(visitedColor));
     return InterpolationValue(std::move(colorPair));
 }
 
 InterpolationValue CSSColorInterpolationType::maybeConvertUnderlyingValue(const InterpolationEnvironment& environment) const
 {
     return convertStyleColorPair(
-        ColorPropertyFunctions::getUnvisitedColor(cssProperty(), *environment.state().style()),
-        ColorPropertyFunctions::getVisitedColor(cssProperty(), *environment.state().style()));
+        ColorPropertyFunctions::getUnvisitedColor(cssProperty(), environment.style()),
+        ColorPropertyFunctions::getVisitedColor(cssProperty(), environment.style()));
 }
 
 void CSSColorInterpolationType::apply(const InterpolableValue& interpolableValue, const NonInterpolableValue*, InterpolationEnvironment& environment) const
 {
     const InterpolableList& colorPair = toInterpolableList(interpolableValue);
     ASSERT(colorPair.length() == InterpolableColorPairIndexCount);
-    ColorPropertyFunctions::setUnvisitedColor(cssProperty(), *environment.state().style(),
+    ColorPropertyFunctions::setUnvisitedColor(cssProperty(), environment.style(),
         resolveInterpolableColor(*colorPair.get(Unvisited), environment.state(), false, cssProperty() == CSSPropertyTextDecorationColor));
-    ColorPropertyFunctions::setVisitedColor(cssProperty(), *environment.state().style(),
+    ColorPropertyFunctions::setVisitedColor(cssProperty(), environment.style(),
         resolveInterpolableColor(*colorPair.get(Visited), environment.state(), true, cssProperty() == CSSPropertyTextDecorationColor));
 }
 
 } // namespace blink