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

Source/core/css/CSSValuePool.cpp

Index: Source/core/css/CSSValuePool.cpp
diff --git a/Source/core/css/CSSValuePool.cpp b/Source/core/css/CSSValuePool.cpp
index 2a5f672eafab70f7a3c9e97ec4dbe5336a98a53d..11443cca94ffb76270666ac8a9d64fe3dc2b582f 100644
--- a/Source/core/css/CSSValuePool.cpp
+++ b/Source/core/css/CSSValuePool.cpp
@@ -143,9 +143,9 @@ PassRefPtrWillBeRawPtr<CSSValueList> CSSValuePool::createFontFaceValue(const Ato
 
     RefPtrWillBeMember<CSSValueList>& value = m_fontFaceValueCache.add(string, nullptr).storedValue->value;
     if (!value) {
-        RefPtrWillBeRawPtr<CSSValue> parsedValue = CSSParser::parseSingleValue(CSSPropertyFontFamily, string);
+        NullableCSSValue parsedValue = CSSParser::parseSingleValue(CSSPropertyFontFamily, string);
         if (parsedValue && parsedValue->isValueList())
-            value = toCSSValueList(parsedValue.get());
+            value = toCSSValueList(parsedValue);
     }
     return value;
 }