[CSS Grid Layout] Update grid-auto-flow to the new syntax

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 1942 matching lines @@
             if (!featureSettings || !featureSettings->size())
                 return cssValuePool().createIdentifierValue(CSSValueNormal);
             RefPtrWillBeRawPtr<CSSValueList> list = CSSValueList::createCommaSeparated();
             for (unsigned i = 0; i < featureSettings->size(); ++i) {
                 const FontFeature& feature = featureSettings->at(i);
                 RefPtrWillBeRawPtr<CSSFontFeatureValue> featureValue = CSSFontFeatureValue::create(feature.tag(), feature.value());
                 list->append(featureValue.release());
             }
             return list.release();
         }
-        case CSSPropertyGridAutoFlow:
-            return cssValuePool().createValue(style->gridAutoFlow());
+        case CSSPropertyGridAutoFlow: {
+            RefPtrWillBeRawPtr<CSSValueList> list = CSSValueList::createSpaceSeparated();
+            switch (style->gridAutoFlow()) {
+            case AutoFlowRow:
+            case AutoFlowRowDense:
+                list->append(cssValuePool().createIdentifierValue(CSSValueRow));
+                break;
+            case AutoFlowColumn:
+            case AutoFlowColumnDense:
+                list->append(cssValuePool().createIdentifierValue(CSSValueColumn));
+                break;
+            case AutoFlowStackRow:
+            case AutoFlowStackColumn:
+                list->append(cssValuePool().createIdentifierValue(CSSValueStack));
+                break;
+            default:
+                ASSERT_NOT_REACHED();
+            }
 
+            switch (style->gridAutoFlow()) {
+            case AutoFlowRowDense:
+            case AutoFlowColumnDense:
+                list->append(cssValuePool().createIdentifierValue(CSSValueDense));
+                break;
+            case AutoFlowStackRow:
+                list->append(cssValuePool().createIdentifierValue(CSSValueRow));
+                break;
+            case AutoFlowStackColumn:
+                list->append(cssValuePool().createIdentifierValue(CSSValueColumn));
+                break;
+            default:
+                // Do nothing.
+                break;
+            }
+
+            return list.release();
+        }
         // Specs mention that getComputedStyle() should return the used value of the property instead of the computed
         // one for grid-definition-{rows|columns} but not for the grid-auto-{rows|columns} as things like
         // grid-auto-columns: 2fr; cannot be resolved to a value in pixels as the '2fr' means very different things
         // depending on the size of the explicit grid or the number of implicit tracks added to the grid. See
         // http://lists.w3.org/Archives/Public/www-style/2013Nov/0014.html
         case CSSPropertyGridAutoColumns:
             return specifiedValueForGridTrackSize(style->gridAutoColumns(), *style);
         case CSSPropertyGridAutoRows:
             return specifiedValueForGridTrackSize(style->gridAutoRows(), *style);
 
@@ skipping 1086 matching lines @@
     return list.release();
 }
 
 void CSSComputedStyleDeclaration::trace(Visitor* visitor)
 {
     visitor->trace(m_node);
     CSSStyleDeclaration::trace(visitor);
 }
 
 } // namespace WebCore