Add support for the column-fill property.

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 1889 matching lines @@
         case CSSPropertyColor:
             return cssValuePool().createColorValue(m_allowVisitedStyle ? style->visitedDependentColor(CSSPropertyColor).rgb() : style->color().rgb());
         case CSSPropertyWebkitPrintColorAdjust:
             return cssValuePool().createValue(style->printColorAdjust());
         case CSSPropertyWebkitColumnAxis:
             return cssValuePool().createValue(style->columnAxis());
         case CSSPropertyWebkitColumnCount:
             if (style->hasAutoColumnCount())
                 return cssValuePool().createIdentifierValue(CSSValueAuto);
             return cssValuePool().createValue(style->columnCount(), CSSPrimitiveValue::CSS_NUMBER);
+        case CSSPropertyWebkitColumnFill:
+            return cssValuePool().createValue(style->columnFill());
         case CSSPropertyWebkitColumnGap:
             if (style->hasNormalColumnGap())
                 return cssValuePool().createIdentifierValue(CSSValueNormal);
             return zoomAdjustedPixelValue(style->columnGap(), style.get());
         case CSSPropertyWebkitColumnProgression:
             return cssValuePool().createValue(style->columnProgression());
         case CSSPropertyWebkitColumnRuleColor:
             return m_allowVisitedStyle ? cssValuePool().createColorValue(style->visitedDependentColor(CSSPropertyOutlineColor).rgb()) : currentColorOrValidColor(style.get(), style->columnRuleColor());
         case CSSPropertyWebkitColumnRuleStyle:
             return cssValuePool().createValue(style->columnRuleStyle());
@@ skipping 1309 matching lines @@
     static const CSSPropertyID propertiesAfterSlashSeperator[3] = { CSSPropertyBackgroundSize, CSSPropertyBackgroundOrigin,
                                                                     CSSPropertyBackgroundClip };
 
     RefPtr<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