Implement 'scroll-behavior' parsing

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 157 matching lines @@
     CSSPropertyPaddingLeft,
     CSSPropertyPaddingRight,
     CSSPropertyPaddingTop,
     CSSPropertyPageBreakAfter,
     CSSPropertyPageBreakBefore,
     CSSPropertyPageBreakInside,
     CSSPropertyPointerEvents,
     CSSPropertyPosition,
     CSSPropertyResize,
     CSSPropertyRight,
+    CSSPropertyScrollBehavior,
     CSSPropertySpeak,
     CSSPropertyTableLayout,
     CSSPropertyTabSize,
     CSSPropertyTextAlign,
     CSSPropertyTextAlignLast,
     CSSPropertyTextDecoration,
     CSSPropertyTextDecorationLine,
     CSSPropertyTextDecorationStyle,
     CSSPropertyTextDecorationColor,
     CSSPropertyTextJustify,
@@ skipping 1962 matching lines @@
             if (pageBreak == PBALWAYS)
                 return 0;
             return cssValuePool().createValue(style->pageBreakInside());
         }
         case CSSPropertyPosition:
             return cssValuePool().createValue(style->position());
         case CSSPropertyRight:
             return valueForPositionOffset(*style, CSSPropertyRight, renderer);
         case CSSPropertyWebkitRubyPosition:
             return cssValuePool().createValue(style->rubyPosition());
+        case CSSPropertyScrollBehavior:
+            return cssValuePool().createValue(style->scrollBehavior());
         case CSSPropertyTableLayout:
             return cssValuePool().createValue(style->tableLayout());
         case CSSPropertyTextAlign:
             return cssValuePool().createValue(style->textAlign());
         case CSSPropertyTextAlignLast:
             return cssValuePool().createValue(style->textAlignLast());
         case CSSPropertyTextDecoration:
             return valuesForShorthandProperty(textDecorationShorthand());
         case CSSPropertyTextDecorationLine:
             return renderTextDecorationFlagsToCSSValue(style->textDecoration());
@@ skipping 974 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