Remove the concept of document.documentElement

sky/engine/core/editing/htmlediting.cpp

 /*
  * Copyright (C) 2004, 2005, 2006, 2007 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 819 matching lines @@
     if (visiblePosition.isNull())
         return 0;
 
     Position p(visiblePosition.deepEquivalent());
     Document& document = *p.document();
     ShadowRoot* shadowRoot = p.anchorNode()->containingShadowRoot();
 
     if (shadowRoot)
         scope = shadowRoot;
     else
-        scope = document.documentElement();
+        scope = &document;
 
     RefPtr<Range> range = Range::create(document, firstPositionInNode(scope.get()), p.parentAnchoredEquivalent());
 
     return TextIterator::rangeLength(range.get(), true);
 }
 
 VisiblePosition visiblePositionForIndex(int index, ContainerNode* scope)
 {
     if (!scope)
         return VisiblePosition();
@@ skipping 74 matching lines @@
     // if the selection starts just before a paragraph break, skip over it
     if (isEndOfParagraph(visiblePosition))
         return visiblePosition.next().deepEquivalent().downstream();
 
     // otherwise, make sure to be at the start of the first selected node,
     // instead of possibly at the end of the last node before the selection
     return visiblePosition.deepEquivalent().downstream();
 }
 
 } // namespace blink