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

Source/core/css/parser/SizesCalcParserTest.cpp

Index: Source/core/css/parser/SizesCalcParserTest.cpp
diff --git a/Source/core/css/parser/SizesCalcParserTest.cpp b/Source/core/css/parser/SizesCalcParserTest.cpp
index 8fcd90c3831bf3428a2614d03ca48db1636ef6c0..b1edc32076b1e26d8347bff71bffd663ecfd34e1 100644
--- a/Source/core/css/parser/SizesCalcParserTest.cpp
+++ b/Source/core/css/parser/SizesCalcParserTest.cpp
@@ -33,8 +33,8 @@ static void verifyCSSCalc(String text, double value, bool valid, unsigned fontSi
 {
     CSSLengthArray lengthArray;
     initLengthArray(lengthArray);
-    RefPtrWillBeRawPtr<CSSValue> cssValue = CSSParser::parseSingleValue(CSSPropertyLeft, text);
-    CSSPrimitiveValue* primitiveValue = toCSSPrimitiveValue(cssValue.get());
+    NullableCSSValue cssValue = CSSParser::parseSingleValue(CSSPropertyLeft, text);
+    CSSPrimitiveValue* primitiveValue = toCSSPrimitiveValue(cssValue);
     if (primitiveValue)
         primitiveValue->accumulateLengthArray(lengthArray);
     else