CSSValue Immediates: Change CSSValue to an object instead of a pointer

Source/core/css/resolver/StyleResolver.h

Index: Source/core/css/resolver/StyleResolver.h
diff --git a/Source/core/css/resolver/StyleResolver.h b/Source/core/css/resolver/StyleResolver.h
index b65a58b6f95b2bab8831842c89f306f227d3390c..3e6b61084b0492ce5c6c4a2ffe89a3edc143dade 100644
--- a/Source/core/css/resolver/StyleResolver.h
+++ b/Source/core/css/resolver/StyleResolver.h
@@ -94,8 +94,8 @@ public:
     PassRefPtr<ComputedStyle> styleForElement(Element*, const ComputedStyle* parentStyle = 0, StyleSharingBehavior = AllowStyleSharing,
         RuleMatchingBehavior = MatchAllRules);
 
-    static PassRefPtrWillBeRawPtr<AnimatableValue> createAnimatableValueSnapshot(Element&, const ComputedStyle* baseStyle, CSSPropertyID, CSSValue*);
-    static PassRefPtrWillBeRawPtr<AnimatableValue> createAnimatableValueSnapshot(StyleResolverState&, CSSPropertyID, CSSValue*);
+    static PassRefPtrWillBeRawPtr<AnimatableValue> createAnimatableValueSnapshot(Element&, const ComputedStyle* baseStyle, CSSPropertyID, NullableCSSValue);
+    static PassRefPtrWillBeRawPtr<AnimatableValue> createAnimatableValueSnapshot(StyleResolverState&, CSSPropertyID, NullableCSSValue);
 
     PassRefPtr<ComputedStyle> pseudoStyleForElement(Element*, const PseudoStyleRequest&, const ComputedStyle* parentStyle);
 
@@ -217,7 +217,7 @@ private:
     template <CSSPropertyPriority priority>
     void applyAnimatedProperties(StyleResolverState&, const WillBeHeapHashMap<PropertyHandle, RefPtrWillBeMember<Interpolation>>&);
     template <CSSPropertyPriority priority>
-    void applyAllProperty(StyleResolverState&, CSSValue*, bool inheritedOnly);
+    void applyAllProperty(StyleResolverState&, CSSValue, bool inheritedOnly);
 
     bool pseudoStyleForElementInternal(Element&, const PseudoStyleRequest&, const ComputedStyle* parentStyle, StyleResolverState&);