Improve named grid areas parsing

third_party/WebKit/Source/core/css/parser/CSSParserIdioms.h

 /*
  * Copyright (C) 2013 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 24 matching lines @@
 
 namespace blink {
 
 // Space characters as defined by the CSS specification.
 // http://www.w3.org/TR/css3-syntax/#whitespace
 inline bool isCSSSpace(UChar c)
 {
     return c == ' ' || c == '\t' || c == '\n';
 }
 
+// http://dev.w3.org/csswg/css-syntax/#name-start-code-point
+template <typename CharacterType>
+bool isNameStartCodePoint(CharacterType c)
+{
+    return isASCIIAlpha(c) || c == '_' || !isASCII(c);
+}
+
+// http://dev.w3.org/csswg/css-syntax/#name-code-point
+template <typename CharacterType>
+bool isNameCodePoint(CharacterType c)
+{
+    return isNameStartCodePoint(c) || isASCIIDigit(c) || c == '-';
+}
+
 }
 
 #endif