Add ComputedStyle constructor and getter to InterpolationEnvironment

third_party/WebKit/Source/core/animation/CSSNumberInterpolationType.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/CSSNumberInterpolationType.h"
 
 #include "core/animation/NumberPropertyFunctions.h"
 #include "core/css/resolver/StyleBuilder.h"
 #include "core/css/resolver/StyleResolverState.h"
 #include "wtf/PtrUtil.h"
@@ skipping 58 matching lines @@
 InterpolationValue CSSNumberInterpolationType::maybeConvertValue(const CSSValue& value, const StyleResolverState&, ConversionCheckers&) const
 {
     if (!value.isPrimitiveValue() || !toCSSPrimitiveValue(value).isNumber())
         return nullptr;
     return createNumberValue(toCSSPrimitiveValue(value).getDoubleValue());
 }
 
 InterpolationValue CSSNumberInterpolationType::maybeConvertUnderlyingValue(const InterpolationEnvironment& environment) const
 {
     double underlyingNumber;
-    if (!NumberPropertyFunctions::getNumber(cssProperty(), *environment.state().style(), underlyingNumber))
+    if (!NumberPropertyFunctions::getNumber(cssProperty(), environment.style(), underlyingNumber))
         return nullptr;
     return createNumberValue(underlyingNumber);
 }
 
 void CSSNumberInterpolationType::apply(const InterpolableValue& interpolableValue, const NonInterpolableValue*, InterpolationEnvironment& environment) const
 {
     double clampedNumber = NumberPropertyFunctions::clampNumber(cssProperty(), toInterpolableNumber(interpolableValue).value());
-    if (!NumberPropertyFunctions::setNumber(cssProperty(), *environment.state().style(), clampedNumber))
+    if (!NumberPropertyFunctions::setNumber(cssProperty(), environment.style(), clampedNumber))
         StyleBuilder::applyProperty(cssProperty(), environment.state(), *CSSPrimitiveValue::create(clampedNumber, CSSPrimitiveValue::UnitType::Number));
 }
 
 } // namespace blink