Have positionInParentBeforeNode() / positionInParentAfterNode() take a reference

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 23 matching lines @@
 
 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 positionInParentBeforeNode(m_nodeAfterPositionInAnchor);
+        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;
@@ skipping 108 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