Perf Tryjob: CSSValue refactor step 1

Source/core/animation/css/CSSAnimations.cpp

Index: Source/core/animation/css/CSSAnimations.cpp
diff --git a/Source/core/animation/css/CSSAnimations.cpp b/Source/core/animation/css/CSSAnimations.cpp
index 6da98317900972a5c96556a83a1be4be1b707f59..540997c9fd5a40d2f9bd02b1f3d4f8d418add5ce 100644
--- a/Source/core/animation/css/CSSAnimations.cpp
+++ b/Source/core/animation/css/CSSAnimations.cpp
@@ -89,14 +89,14 @@ static PassRefPtrWillBeRawPtr<StringKeyframeEffectModel> createKeyframeEffectMod
             CSSPropertyID property = properties.propertyAt(j).id();
             specifiedPropertiesForUseCounter.add(property);
             if (property == CSSPropertyAnimationTimingFunction) {
-                CSSValue* value = properties.propertyAt(j).value();
+                CSSValue value = properties.propertyAt(j).value();
                 RefPtr<TimingFunction> timingFunction;
-                if (value->isInheritedValue() && parentStyle->animations()) {
+                if (value.isInheritedValue() && parentStyle->animations()) {
                     timingFunction = parentStyle->animations()->timingFunctionList()[0];
-                } else if (value->isValueList()) {
-                    timingFunction = CSSToStyleMap::mapAnimationTimingFunction(toCSSValueList(value)->item(0));
+                } else if (value.isValueList()) {
+                    timingFunction = CSSToStyleMap::mapAnimationTimingFunction(toCSSValueList(value).item(0));
                 } else {
-                    ASSERT(value->isCSSWideKeyword());
+                    ASSERT(value.isCSSWideKeyword());
                     timingFunction = CSSTimingData::initialTimingFunction();
                 }
                 keyframe->setEasing(timingFunction.release());