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

Source/core/css/CSSCalculationValue.h

Index: Source/core/css/CSSCalculationValue.h
diff --git a/Source/core/css/CSSCalculationValue.h b/Source/core/css/CSSCalculationValue.h
index d79754fa29c1999f12111c0e4a917e21ad1a8a4c..36e79da4b45cfa9dd66060db53014f20b0614845 100644
--- a/Source/core/css/CSSCalculationValue.h
+++ b/Source/core/css/CSSCalculationValue.h
@@ -101,7 +101,7 @@ protected:
     bool m_isInteger;
 };
 
-class CORE_EXPORT CSSCalcValue : public CSSValue {
+class CORE_EXPORT CSSCalcValue : public CSSValueObject {
 public:
     static PassRefPtrWillBeRawPtr<CSSCalcValue> create(CSSParserValueList*, ValueRange);
     static PassRefPtrWillBeRawPtr<CSSCalcValue> create(PassRefPtrWillBeRawPtr<CSSCalcExpressionNode>, ValueRange = ValueRangeAll);
@@ -132,7 +132,7 @@ public:
 
 private:
     CSSCalcValue(PassRefPtrWillBeRawPtr<CSSCalcExpressionNode> expression, ValueRange range)
-        : CSSValue(CalculationClass)
+        : CSSValueObject(CalculationClass)
         , m_expression(expression)
         , m_nonNegative(range == ValueRangeNonNegative)
     {