CSSValue Immediates: Make CSSPrimitiveValue a container

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 b1edc32076b1e26d8347bff71bffd663ecfd34e1..beab3a2692e49d4544c90f24dcc144986d1bee1a 100644
--- a/Source/core/css/parser/SizesCalcParserTest.cpp
+++ b/Source/core/css/parser/SizesCalcParserTest.cpp
@@ -34,9 +34,8 @@ static void verifyCSSCalc(String text, double value, bool valid, unsigned fontSi
     CSSLengthArray lengthArray;
     initLengthArray(lengthArray);
     NullableCSSValue cssValue = CSSParser::parseSingleValue(CSSPropertyLeft, text);
-    CSSPrimitiveValue* primitiveValue = toCSSPrimitiveValue(cssValue);
-    if (primitiveValue)
-        primitiveValue->accumulateLengthArray(lengthArray);
+    if (cssValue)
+        toCSSPrimitiveValue(*cssValue).accumulateLengthArray(lengthArray);
     else
         ASSERT_EQ(valid, false);
     float length = lengthArray.at(CSSPrimitiveValue::UnitTypePixels);