Add ComputedStyle constructor and getter to InterpolationEnvironment

third_party/WebKit/Source/core/animation/CSSMotionRotationInterpolationType.cpp

 // Copyright 2016 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/CSSMotionRotationInterpolationType.h"
 
 #include "core/css/resolver/StyleBuilderConverter.h"
 #include "core/style/StyleMotionRotation.h"
 #include "wtf/PtrUtil.h"
 #include <memory>
@@ skipping 106 matching lines @@
     if (startType != endType)
         return nullptr;
     return PairwiseInterpolationValue(
         std::move(start.interpolableValue),
         std::move(end.interpolableValue),
         start.nonInterpolableValue.release());
 }
 
 InterpolationValue CSSMotionRotationInterpolationType::maybeConvertUnderlyingValue(const InterpolationEnvironment& environment) const
 {
-    return convertMotionRotation(environment.state().style()->motionRotation());
+    return convertMotionRotation(environment.style().motionRotation());
 }
 
 void CSSMotionRotationInterpolationType::composite(UnderlyingValueOwner& underlyingValueOwner, double underlyingFraction, const InterpolationValue& value, double interpolationFraction) const
 {
     const MotionRotationType& underlyingType = toCSSMotionRotationNonInterpolableValue(*underlyingValueOwner.value().nonInterpolableValue).rotationType();
     const MotionRotationType& rotationType = toCSSMotionRotationNonInterpolableValue(*value.nonInterpolableValue).rotationType();
     if (underlyingType == rotationType)
         underlyingValueOwner.mutableValue().interpolableValue->scaleAndAdd(underlyingFraction, *value.interpolableValue);
     else
         underlyingValueOwner.set(*this, value);
 }
 
 void CSSMotionRotationInterpolationType::apply(const InterpolableValue& interpolableValue, const NonInterpolableValue* nonInterpolableValue, InterpolationEnvironment& environment) const
 {
-    environment.state().style()->setMotionRotation(StyleMotionRotation(
+    environment.style().setMotionRotation(StyleMotionRotation(
         toInterpolableNumber(interpolableValue).value(),
         toCSSMotionRotationNonInterpolableValue(*nonInterpolableValue).rotationType()));
 }
 
 } // namespace blink