Use ShadowData in DropShadowFilterOperation

third_party/WebKit/Source/core/animation/ShadowInterpolationFunctions.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/ShadowInterpolationFunctions.h"
 
 #include "core/animation/CSSColorInterpolationType.h"
 #include "core/animation/InterpolationValue.h"
 #include "core/animation/LengthInterpolationFunctions.h"
 #include "core/animation/NonInterpolableValue.h"
@@ skipping 128 matching lines @@
                           CSSColorInterpolationType::createInterpolableColor(
                               StyleColor::currentColor()));
   }
 
   return InterpolationValue(std::move(interpolableList),
                             ShadowNonInterpolableValue::create(style));
 }
 
 std::unique_ptr<InterpolableValue>
 ShadowInterpolationFunctions::createNeutralInterpolableValue() {
-  return convertShadowData(ShadowData(FloatPoint(0, 0), 0, 0, Normal,
-                                      StyleColor(Color::transparent)),
-                           1)
-      .interpolableValue;
+  return convertShadowData(ShadowData::neutralValue(), 1).interpolableValue;
 }
 
 void ShadowInterpolationFunctions::composite(
     std::unique_ptr<InterpolableValue>& underlyingInterpolableValue,
     RefPtr<NonInterpolableValue>& underlyingNonInterpolableValue,
     double underlyingFraction,
     const InterpolableValue& interpolableValue,
     const NonInterpolableValue* nonInterpolableValue) {
   DCHECK(nonInterpolableValuesAreCompatible(
       underlyingNonInterpolableValue.get(), nonInterpolableValue));
@@ skipping 27 matching lines @@
   DCHECK(shadowX.isFixed() && shadowY.isFixed() && shadowBlur.isFixed() &&
          shadowSpread.isFixed());
   return ShadowData(FloatPoint(shadowX.value(), shadowY.value()),
                     shadowBlur.value(), shadowSpread.value(),
                     shadowNonInterpolableValue.style(),
                     CSSColorInterpolationType::resolveInterpolableColor(
                         *interpolableList.get(ShadowColor), state));
 }
 
 }  // namespace blink