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

Source/core/css/CSSValue.h

 /*
  * (C) 1999-2003 Lars Knoll (knoll@kde.org)
  * Copyright (C) 2004, 2005, 2006, 2007, 2008 Apple Inc. All rights reserved.
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Library General Public
  * License as published by the Free Software Foundation; either
  * version 2 of the License, or (at your option) any later version.
  *
  * This library is distributed in the hope that it will be useful,
@@ skipping 87 matching lines @@
     bool isFilterValue() const { return m_classType == CSSFilterClass; }
     bool isArrayFunctionValue() const { return m_classType == CSSArrayFunctionValueClass; }
     bool isMixFunctionValue() const { return m_classType == CSSMixFunctionValueClass; }
     bool isShaderValue() const { return m_classType == CSSShaderClass; }
     bool isVariableValue() const { return m_classType == VariableClass; }
     bool isGridTemplateValue() const { return m_classType == GridTemplateClass; }
     bool isSVGColor() const { return m_classType == SVGColorClass || m_classType == SVGPaintClass; }
     bool isSVGPaint() const { return m_classType == SVGPaintClass; }
     bool isSVGDocumentValue() const { return m_classType == CSSSVGDocumentClass; }
     bool isUnicodeRangeValue() const { return m_classType == UnicodeRangeClass; }
+    bool isGridLineNamesValue() const { return m_classType == GridLineNamesClass; }
 
     bool isCSSOMSafe() const { return m_isCSSOMSafe; }
     bool isSubtypeExposedToCSSOM() const
     {
         return isPrimitiveValue() || isSVGColor() || isValueList();
     }
 
     PassRefPtr<CSSValue> cloneForCSSOM() const;
 
     void addSubresourceStyleURLs(ListHashSet<KURL>&, const StyleSheetContents*) const;
@@ skipping 47 matching lines @@
         SVGPaintClass,
         CSSSVGDocumentClass,
 
         // List class types must appear after ValueListClass.
         ValueListClass,
         ImageSetClass,
         CSSFilterClass,
         CSSArrayFunctionValueClass,
         CSSMixFunctionValueClass,
         CSSTransformClass,
+        GridLineNamesClass,
         // Do not append non-list class types here.
     };
 
     static const size_t ValueListSeparatorBits = 2;
     enum ValueListSeparator {
         SpaceSeparator,
         CommaSeparator,
         SlashSeparator
     };
 
@@ skipping 57 matching lines @@
 {
     return first ? second && first->equals(*second) : !second;
 }
 
 #define DEFINE_CSS_VALUE_TYPE_CASTS(thisType, predicate) \
     DEFINE_TYPE_CASTS(thisType, CSSValue, value, value->predicate, value.predicate)
 
 } // namespace WebCore
 
 #endif // CSSValue_h