Have Position deal with more references

Source/core/dom/PositionIterator.cpp

 /*
  * Copyright (C) 2007, 2008 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 22 matching lines @@
 namespace WebCore {
 
 using namespace HTMLNames;
 
 PositionIterator::operator Position() const
 {
     if (m_nodeAfterPositionInAnchor) {
         ASSERT(m_nodeAfterPositionInAnchor->parentNode() == m_anchorNode);
         // FIXME: This check is inadaquete because any ancestor could be ignored by editing
         if (editingIgnoresContent(m_nodeAfterPositionInAnchor->parentNode()))
-            return positionBeforeNode(m_anchorNode);
+            return positionBeforeNode(*m_anchorNode);
         return positionInParentBeforeNode(*m_nodeAfterPositionInAnchor);
     }
     if (m_anchorNode->hasChildren())
         return lastPositionInOrAfterNode(m_anchorNode);
     return createLegacyEditingPosition(m_anchorNode, m_offsetInAnchor);
 }
 
 void PositionIterator::increment()
 {
     if (!m_anchorNode)
         return;
 
     if (m_nodeAfterPositionInAnchor) {
         m_anchorNode = m_nodeAfterPositionInAnchor;
         m_nodeAfterPositionInAnchor = m_anchorNode->firstChild();
         m_offsetInAnchor = 0;
         return;
     }
 
     if (!m_anchorNode->hasChildren() && m_offsetInAnchor < lastOffsetForEditing(m_anchorNode))
-        m_offsetInAnchor = Position::uncheckedNextOffset(m_anchorNode, m_offsetInAnchor);
+        m_offsetInAnchor = Position::uncheckedNextOffset(*m_anchorNode, m_offsetInAnchor);
     else {
         m_nodeAfterPositionInAnchor = m_anchorNode;
         m_anchorNode = m_nodeAfterPositionInAnchor->parentNode();
         m_nodeAfterPositionInAnchor = m_nodeAfterPositionInAnchor->nextSibling();
         m_offsetInAnchor = 0;
     }
 }
 
 void PositionIterator::decrement()
 {
@@ skipping 11 matching lines @@
             m_offsetInAnchor = 0;
         }
         return;
     }
 
     if (m_anchorNode->hasChildren()) {
         m_anchorNode = m_anchorNode->lastChild();
         m_offsetInAnchor = m_anchorNode->hasChildren()? 0: lastOffsetForEditing(m_anchorNode);
     } else {
         if (m_offsetInAnchor)
-            m_offsetInAnchor = Position::uncheckedPreviousOffset(m_anchorNode, m_offsetInAnchor);
+            m_offsetInAnchor = Position::uncheckedPreviousOffset(*m_anchorNode, m_offsetInAnchor);
         else {
             m_nodeAfterPositionInAnchor = m_anchorNode;
             m_anchorNode = m_anchorNode->parentNode();
         }
     }
 }
 
 bool PositionIterator::atStart() const
 {
     if (!m_anchorNode)
@@ skipping 56 matching lines @@
             if (!Position::hasRenderedNonAnonymousDescendantsWithHeight(renderer))
                 return atStartOfNode() && !Position::nodeIsUserSelectNone(m_anchorNode);
             return m_anchorNode->rendererIsEditable() && !Position::nodeIsUserSelectNone(m_anchorNode) && Position(*this).atEditingBoundary();
         }
     }
 
     return false;
 }
 
 } // namespace WebCore