CSSValue Immediates: Replace CSSPrimitiveValue usage with const references

Source/core/css/parser/CSSPropertyParser.h

Index: Source/core/css/parser/CSSPropertyParser.h
diff --git a/Source/core/css/parser/CSSPropertyParser.h b/Source/core/css/parser/CSSPropertyParser.h
index 11d42e32612f18e2fa6c3caa8de9ca0fb2672c9c..d236738a4d4a9acfb21826d6505ed8895b16e314 100644
--- a/Source/core/css/parser/CSSPropertyParser.h
+++ b/Source/core/css/parser/CSSPropertyParser.h
@@ -92,7 +92,7 @@ private:
 
     KURL completeURL(const String& url) const;
 
-    void addProperty(CSSPropertyID, CSSValue, bool important, bool implicit = false);
+    void addProperty(CSSPropertyID, const CSSValue&, bool important, bool implicit = false);
     void rollbackLastProperties(int num);
     void addExpandedPropertyForValue(CSSPropertyID propId, CSSValue, bool);
 
@@ -115,8 +115,8 @@ private:
     void parse2ValuesFillPosition(CSSParserValueList*, NullableCSSValue&, NullableCSSValue&, Units = FUnknown);
     bool isPotentialPositionValue(CSSParserValue*);
     void parseFillPosition(CSSParserValueList*, NullableCSSValue&, NullableCSSValue&, Units = FUnknown);
-    void parse3ValuesFillPosition(CSSParserValueList*, NullableCSSValue&, NullableCSSValue&, CSSPrimitiveValue, CSSPrimitiveValue);
-    void parse4ValuesFillPosition(CSSParserValueList*, NullableCSSValue&, NullableCSSValue&, CSSPrimitiveValue, CSSPrimitiveValue);
+    void parse3ValuesFillPosition(CSSParserValueList*, NullableCSSValue&, NullableCSSValue&, const CSSPrimitiveValue&, const CSSPrimitiveValue&);
+    void parse4ValuesFillPosition(CSSParserValueList*, NullableCSSValue&, NullableCSSValue&, const CSSPrimitiveValue&, const CSSPrimitiveValue&);
 
     void parseFillRepeat(NullableCSSValue&, NullableCSSValue&);
     NullableCSSValue parseFillSize(CSSPropertyID);
@@ -124,7 +124,7 @@ private:
     bool parseFillProperty(CSSPropertyID propId, CSSPropertyID& propId1, CSSPropertyID& propId2, NullableCSSValue&, NullableCSSValue&);
     bool parseFillShorthand(CSSPropertyID, const CSSPropertyID* properties, int numProperties, bool important);
 
-    void addFillValue(NullableCSSValue& lval, CSSValue rval);
+    void addFillValue(NullableCSSValue& lval, const CSSValue& rval);
 
     NullableCSSValue parseAnimationDelay();
     NullableCSSValue parseAnimationDirection();
@@ -361,7 +361,7 @@ private:
 
     bool parseDeprecatedGradientColorStop(CSSParserValue*, CSSGradientColorStop&);
 
-    void commitBorderImageProperty(CSSPropertyID, NullableCSSValue, bool important);
+    void commitBorderImageProperty(CSSPropertyID, const NullableCSSValue&, bool important);
 
     NullableCSSValue parseScrollSnapPoints();
     NullableCSSValue parseScrollSnapDestination();