[CSS Grid Layout] Implementation of the grid shorthand.

Source/core/css/CSSComputedStyleDeclaration.cpp

 /*
  * Copyright (C) 2004 Zack Rusin <zack@kde.org>
  * Copyright (C) 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012 Apple Inc. All rights reserved.
  * Copyright (C) 2007 Alexey Proskuryakov <ap@webkit.org>
  * Copyright (C) 2007 Nicholas Shanks <webkit@nickshanks.com>
  * Copyright (C) 2011 Sencha, Inc. All rights reserved.
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Lesser General Public
  * License as published by the Free Software Foundation; either
@@ skipping 1967 matching lines @@
         case CSSPropertyGridRowEnd:
             return valueForGridPosition(style->gridRowEnd());
         case CSSPropertyGridColumn:
             return valuesForGridShorthand(gridColumnShorthand());
         case CSSPropertyGridRow:
             return valuesForGridShorthand(gridRowShorthand());
         case CSSPropertyGridArea:
             return valuesForGridShorthand(gridAreaShorthand());
         case CSSPropertyGridTemplate:
             return valuesForGridShorthand(gridTemplateShorthand());
+        case CSSPropertyGrid:
+            return valuesForGridShorthand(gridShorthand());
         case CSSPropertyGridTemplateAreas:
             if (!style->namedGridAreaRowCount()) {
                 ASSERT(!style->namedGridAreaColumnCount());
                 return cssValuePool().createIdentifierValue(CSSValueNone);
             }
 
             return CSSGridTemplateAreasValue::create(style->namedGridArea(), style->namedGridAreaRowCount(), style->namedGridAreaColumnCount());
 
         case CSSPropertyHeight:
             if (renderer) {
@@ skipping 1052 matching lines @@
     static const CSSPropertyID propertiesAfterSlashSeperator[3] = { CSSPropertyBackgroundSize, CSSPropertyBackgroundOrigin,
                                                                     CSSPropertyBackgroundClip };
 
     RefPtrWillBeRawPtr<CSSValueList> list = CSSValueList::createSlashSeparated();
     list->append(valuesForShorthandProperty(StylePropertyShorthand(CSSPropertyBackground, propertiesBeforeSlashSeperator, WTF_ARRAY_LENGTH(propertiesBeforeSlashSeperator))));
     list->append(valuesForShorthandProperty(StylePropertyShorthand(CSSPropertyBackground, propertiesAfterSlashSeperator, WTF_ARRAY_LENGTH(propertiesAfterSlashSeperator))));
     return list.release();
 }
 
 } // namespace WebCore