Make pseudo-classes selector queries work on DocumentFragment

Source/core/dom/ContainerNode.cpp

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  *           (C) 2001 Dirk Mueller (mueller@kde.org)
  * Copyright (C) 2004, 2005, 2006, 2007, 2008, 2009 Apple Inc. All rights reserved.
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Library General Public
  * License as published by the Free Software Foundation; either
  * version 2 of the License, or (at your option) any later version.
@@ skipping 1016 matching lines @@
     return rareData()->hasRestyleFlag(mask);
 }
 
 bool ContainerNode::hasRestyleFlagsInternal() const
 {
     return rareData()->hasRestyleFlags();
 }
 
 void ContainerNode::setRestyleFlag(DynamicRestyleFlags mask)
 {
-    ASSERT(isElementNode() || isShadowRoot());
+    ASSERT(isElementNode() || isDocumentFragment());

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

This is wrong, we shouldn't set restyle flags in a DocumentFragment that's not a
ShadowRoot.

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

Done.

     ensureRareData().setRestyleFlag(mask);
 }
 
 void ContainerNode::checkForChildrenAdjacentRuleChanges()
 {
     bool hasDirectAdjacentRules = childrenAffectedByDirectAdjacentRules();
     bool hasIndirectAdjacentRules = childrenAffectedByIndirectAdjacentRules();
 
     if (!hasDirectAdjacentRules && !hasIndirectAdjacentRules)
         return;
@@ skipping 164 matching lines @@
         return true;
 
     if (node->isElementNode() && toElement(node)->shadow())
         return true;
 
     return false;
 }
 #endif
 
 } // namespace WebCore