[CSSGridLayout] Switch from parentheses to brackets for grid line names

Source/core/css/parser/CSSPropertyParser.cpp

Index: Source/core/css/parser/CSSPropertyParser.cpp
diff --git a/Source/core/css/parser/CSSPropertyParser.cpp b/Source/core/css/parser/CSSPropertyParser.cpp
index 119ea6bf959ffa64c81bf48d7c10d1bf913d9a73..9e55d7a13c03abd3f622adea1e1180b8e9e89afa 100644
--- a/Source/core/css/parser/CSSPropertyParser.cpp
+++ b/Source/core/css/parser/CSSPropertyParser.cpp
@@ -3443,27 +3443,26 @@ bool CSSPropertyParser::parseSingleGridAreaLonghand(RefPtrWillBeRawPtr<CSSValue>
 
 void CSSPropertyParser::maybeParseGridLineNames(CSSParserValueList& inputList, CSSValueList& valueList, CSSGridLineNamesValue* previousNamedAreaTrailingLineNames)
 {
-    if (!inputList.current() || inputList.current()->unit != CSSParserValue::ValueList)
+    if (!inputList.current() || inputList.current()->unit != CSSParserValue::Operator || inputList.current()->iValue != '[')
         return;
 
-    CSSParserValueList* identList = inputList.current()->valueList;
-    if (!identList->size()) {
-        inputList.next();
-        return;
-    }
-
-    // Need to ensure the identList is at the heading index, since the parserList might have been rewound.
-    identList->setCurrentIndex(0);
+    // Skip '['
+    inputList.next();
 
     RefPtrWillBeRawPtr<CSSGridLineNamesValue> lineNames = previousNamedAreaTrailingLineNames;
     if (!lineNames)
         lineNames = CSSGridLineNamesValue::create();
-    while (CSSParserValue* identValue = identList->current()) {
+
+    while (CSSParserValue* identValue = inputList.current()) {
+        if (identValue->unit == CSSParserValue::Operator && identValue->iValue == ']')
+            break;
+
         if (identValue->unit != CSSPrimitiveValue::CSS_IDENT)
             return;
+
         RefPtrWillBeRawPtr<CSSPrimitiveValue> lineName = createPrimitiveCustomIdentValue(identValue);
         lineNames->append(lineName.release());
-        identList->next();
+        inputList.next();
     }
     if (!previousNamedAreaTrailingLineNames)
         valueList.append(lineNames.release());