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

Source/core/css/PropertySetCSSStyleDeclaration.cpp

Index: Source/core/css/PropertySetCSSStyleDeclaration.cpp
diff --git a/Source/core/css/PropertySetCSSStyleDeclaration.cpp b/Source/core/css/PropertySetCSSStyleDeclaration.cpp
index ec18cbeeedac2e5c18277bd4792c62e5b8d8e21a..9299dfe6b903b7eb44bcb461cf93665fca64bb58 100644
--- a/Source/core/css/PropertySetCSSStyleDeclaration.cpp
+++ b/Source/core/css/PropertySetCSSStyleDeclaration.cpp
@@ -239,7 +239,7 @@ String AbstractPropertySetCSSStyleDeclaration::removeProperty(const String& prop
     return result;
 }
 
-PassRefPtrWillBeRawPtr<CSSValue> AbstractPropertySetCSSStyleDeclaration::getPropertyCSSValueInternal(CSSPropertyID propertyID)
+NullableCSSValue AbstractPropertySetCSSStyleDeclaration::getPropertyCSSValueInternal(CSSPropertyID propertyID)
 {
     return propertySet().getPropertyCSSValue(propertyID);
 }
@@ -273,7 +273,7 @@ PassRefPtrWillBeRawPtr<MutableStylePropertySet> AbstractPropertySetCSSStyleDecla
     return propertySet().mutableCopy();
 }
 
-bool AbstractPropertySetCSSStyleDeclaration::cssPropertyMatches(CSSPropertyID propertyID, const CSSValue* propertyValue) const
+bool AbstractPropertySetCSSStyleDeclaration::cssPropertyMatches(CSSPropertyID propertyID, const CSSValue propertyValue) const
 {
     return propertySet().propertyMatches(propertyID, propertyValue);
 }