CSS Custom Properties (Variables)

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 c7b5775968e452e28660760aa2a5ba77a98b2cc6..7b9ba8f0bfc566f08244bdc7d5709dfd5de9374a 100644
--- a/Source/core/css/parser/CSSPropertyParser.h
+++ b/Source/core/css/parser/CSSPropertyParser.h
@@ -76,6 +76,8 @@ public:
 
     static bool isSystemColor(int id);
 
+    static bool isVariableReference(CSSParserValue*);
+
 private:
     CSSPropertyParser(CSSParserValueList*, const CSSParserContext&,
         WillBeHeapVector<CSSProperty, 256>&, StyleRule::Type);
@@ -272,6 +274,7 @@ private:
     PassRefPtrWillBeRawPtr<CSSPrimitiveValue> createPrimitiveNumericValue(CSSParserValue*);
     PassRefPtrWillBeRawPtr<CSSPrimitiveValue> createPrimitiveStringValue(CSSParserValue*);
     PassRefPtrWillBeRawPtr<CSSPrimitiveValue> createPrimitiveCustomIdentValue(CSSParserValue*);
+    PassRefPtrWillBeRawPtr<CSSPrimitiveValue> createPrimitiveVariableReferenceValue(CSSParserValue*);
 
     PassRefPtrWillBeRawPtr<CSSValue> createCSSImageValueWithReferrer(const String& rawValue, const KURL&);