Remove the concept of document.documentElement

sky/engine/core/dom/Position.cpp

 /*
  * Copyright (C) 2004, 2005, 2006, 2009 Apple Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
@@ skipping 398 matching lines @@
 
     return nextPosition.isNotNull() && !nextPosition.deprecatedNode()->hasEditableStyle()
         && prevPosition.isNotNull() && !prevPosition.deprecatedNode()->hasEditableStyle();
 }
 
 Node* Position::parentEditingBoundary() const
 {
     if (!m_anchorNode)
         return 0;
 
-    Node* documentElement = m_anchorNode->document().documentElement();
-    if (!documentElement)
-        return 0;
-
+    // FIXME: Why does this look at parentNode?
     Node* boundary = m_anchorNode.get();
-    while (boundary != documentElement && boundary->nonShadowBoundaryParentNode() && m_anchorNode->hasEditableStyle() == boundary->parentNode()->hasEditableStyle())
+    while (boundary->nonShadowBoundaryParentNode()
+           && boundary->nonShadowBoundaryParentNode()->isElementNode()
+           && m_anchorNode->hasEditableStyle() == boundary->parentNode()->hasEditableStyle())
         boundary = boundary->nonShadowBoundaryParentNode();
 
     return boundary;
 }
 
-
 bool Position::atStartOfTree() const
 {
     if (isNull())
         return true;
     return !deprecatedNode()->parentNode() && m_offset <= 0;
 }
 
 bool Position::atEndOfTree() const
 {
     if (isNull())
@@ skipping 794 matching lines @@
     pos.showTreeForThis();
 }
 
 void showTree(const blink::Position* pos)
 {
     if (pos)
         pos->showTreeForThis();
 }
 
 #endif