[CSS Grid Layout] Update named grid lines syntax to the last version of the specs

Source/core/css/CSSParserValues.h

Index: Source/core/css/CSSParserValues.h
diff --git a/Source/core/css/CSSParserValues.h b/Source/core/css/CSSParserValues.h
index 0aafa37c1bb65a0b27ce6fe0737e42508a1ae197..6655f5ad8bc42f1668a19c0c3577d1fdd97842fe 100644
--- a/Source/core/css/CSSParserValues.h
+++ b/Source/core/css/CSSParserValues.h
@@ -141,16 +141,19 @@ struct CSSParserValue {
         int iValue;
         CSSParserString string;
         CSSParserFunction* function;
+        CSSParserValueList* valueList;
     };
     enum {
-        Operator = 0x100000,
-        Function = 0x100001,
-        Q_EMS    = 0x100002
+        Operator  = 0x100000,
+        Function  = 0x100001,
+        ValueList = 0x100002,
+        Q_EMS     = 0x100003,
     };
     int unit;
 
     inline void setFromNumber(double value, int unit = CSSPrimitiveValue::CSS_NUMBER);
     inline void setFromFunction(CSSParserFunction*);
+    inline void setFromValueList(PassOwnPtr<CSSParserValueList>);
 
     PassRefPtr<CSSValue> createCSSValue();
 };
@@ -265,6 +268,13 @@ inline void CSSParserValue::setFromFunction(CSSParserFunction* function)
     unit = Function;
 }
 
+inline void CSSParserValue::setFromValueList(PassOwnPtr<CSSParserValueList> valueList)
+{
+    id = CSSValueInvalid;
+    this->valueList = valueList.leakPtr();
+    unit = ValueList;
+}
+
 }
 
 #endif