Oilpan: cleanup based on review comments after removal of TreeShared.

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 468 matching lines @@
 
     ASSERT(oldChild.parentNode() == this);
 
     if (!oldChild.needsAttach())
         oldChild.detach();
 
     if (nextChild)
         nextChild->setPreviousSibling(previousChild);
     if (previousChild)
         previousChild->setNextSibling(nextChild);
-    if (m_firstChild == &oldChild)
+    if (m_firstChild == oldChild)
         m_firstChild = nextChild;
-    if (m_lastChild == &oldChild)
+    if (m_lastChild == oldChild)
         m_lastChild = previousChild;
 
     oldChild.setPreviousSibling(0);
     oldChild.setNextSibling(0);
     oldChild.setParentOrShadowHostNode(0);
 
     document().adoptIfNeeded(oldChild);
 }
 
 void ContainerNode::parserRemoveChild(Node& oldChild)
@@ skipping 710 matching lines @@
         return true;
 
     if (node->isElementNode() && toElement(node)->shadow())
         return true;
 
     return false;
 }
 #endif
 
 } // namespace WebCore