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 7a08cc4379af51ce5efab254dea6af283211028c..027d15869cf285e5bd501e7eb9ebd7e183fe1cb6 100644
--- a/Source/core/css/PropertySetCSSStyleDeclaration.cpp
+++ b/Source/core/css/PropertySetCSSStyleDeclaration.cpp
@@ -236,7 +236,7 @@ String AbstractPropertySetCSSStyleDeclaration::removeProperty(const String& prop
     return result;
 }
 
-PassRefPtrWillBeRawPtr<CSSValue> AbstractPropertySetCSSStyleDeclaration::getPropertyCSSValueInternal(CSSPropertyID propertyID)
+NullableCSSValue AbstractPropertySetCSSStyleDeclaration::getPropertyCSSValueInternal(CSSPropertyID propertyID)
 {
     return propertySet().getPropertyCSSValue(propertyID);
 }
@@ -265,7 +265,7 @@ StyleSheetContents* AbstractPropertySetCSSStyleDeclaration::contextStyleSheet()
     return cssStyleSheet ? cssStyleSheet->contents() : 0;
 }
 
-bool AbstractPropertySetCSSStyleDeclaration::cssPropertyMatches(CSSPropertyID propertyID, const CSSValue* propertyValue) const
+bool AbstractPropertySetCSSStyleDeclaration::cssPropertyMatches(CSSPropertyID propertyID, const CSSValue propertyValue) const
 {
     return propertySet().propertyMatches(propertyID, propertyValue);
 }