Add ComputedStyle constructor and getter to InterpolationEnvironment

third_party/WebKit/Source/core/animation/CSSFontSizeInterpolationType.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/CSSFontSizeInterpolationType.h"
 
 #include "core/animation/CSSLengthInterpolationType.h"
 #include "core/css/CSSPrimitiveValue.h"
 #include "core/css/resolver/StyleResolverState.h"
 #include "platform/LengthFunctions.h"
@@ skipping 93 matching lines @@
         return InterpolationValue(std::move(result));
 
     if (!value.isPrimitiveValue() || !toCSSPrimitiveValue(value).isValueID())
         return nullptr;
 
     return maybeConvertKeyword(toCSSPrimitiveValue(value).getValueID(), state, conversionCheckers);
 }
 
 InterpolationValue CSSFontSizeInterpolationType::maybeConvertUnderlyingValue(const InterpolationEnvironment& environment) const
 {
-    return convertFontSize(environment.state().style()->specifiedFontSize());
+    return convertFontSize(environment.style().specifiedFontSize());
 }
 
 void CSSFontSizeInterpolationType::apply(const InterpolableValue& interpolableValue, const NonInterpolableValue*, InterpolationEnvironment& environment) const
 {
     const FontDescription& parentFont = environment.state().parentFontDescription();
     Length fontSizeLength = CSSLengthInterpolationType::resolveInterpolableLength(interpolableValue, nullptr, environment.state().fontSizeConversionData(), ValueRangeNonNegative);
     float fontSize = floatValueForLength(fontSizeLength, parentFont.getSize().value);
     environment.state().fontBuilder().setSize(FontDescription::Size(0, fontSize, !fontSizeLength.hasPercent() || parentFont.isAbsoluteSize()));
 }
 
 } // namespace blink