Make pseudo-classes selector queries work on DocumentFragment

Source/core/css/resolver/SharedStyleFinder.cpp

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 2004-2005 Allan Sandfeld Jensen (kde@carewolf.com)
  * Copyright (C) 2006, 2007 Nicholas Shanks (webkit@nickshanks.com)
  * Copyright (C) 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 Apple Inc. All rights reserved.
  * Copyright (C) 2007 Alexey Proskuryakov <ap@webkit.org>
  * Copyright (C) 2007, 2008 Eric Seidel <eric@webkit.org>
  * Copyright (C) 2008, 2009 Torch Mobile Inc. All rights reserved. (http://www.torchmobile.com/)
  * Copyright (c) 2011, Code Aurora Forum. All rights reserved.
  * Copyright (C) Research In Motion Limited 2011. All rights reserved.
@@ skipping 319 matching lines @@
         INCREMENT_STYLE_STATS_COUNTER(m_styleResolver, sharedStyleRejectedBySiblingRules);
         return 0;
     }
 
     if (matchesRuleSet(m_uncommonAttributeRuleSet)) {
         INCREMENT_STYLE_STATS_COUNTER(m_styleResolver, sharedStyleRejectedByUncommonAttributeRules);
         return 0;
     }
 
     // Tracking child index requires unique style for each node. This may get set by the sibling rule match above.
-    if (!element().parentElementOrShadowRoot()->childrenSupportStyleSharing()) {
+    if (!element().parentElementOrDocumentFragment()->childrenSupportStyleSharing()) {

[esprehn, 2014/05/08 05:25:11]

This also doesn't make sense, we can't style share in a DocumentFragment. It's
never attached.

[Inactive, 2014/05/08 13:17:36]

Done.

         INCREMENT_STYLE_STATS_COUNTER(m_styleResolver, sharedStyleRejectedByParent);
         return 0;
     }
 
     return shareElement->renderStyle();
 }
 
 }