Have positionInParentBeforeNode() / positionInParentAfterNode() take a reference

Source/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 192 matching lines @@
 // Neighbor-anchored positions are invalid DOM positions, so they need to be
 // fixed up before handing them off to the Range object.
 Position Position::parentAnchoredEquivalent() const
 {
     if (!m_anchorNode)
         return Position();
 
     // FIXME: This should only be necessary for legacy positions, but is also needed for positions before and after Tables
     if (m_offset <= 0 && (m_anchorType != PositionIsAfterAnchor && m_anchorType != PositionIsAfterChildren)) {
         if (m_anchorNode->parentNode() && (editingIgnoresContent(m_anchorNode.get()) || isRenderedTableElement(m_anchorNode.get())))
-            return positionInParentBeforeNode(m_anchorNode.get());
+            return positionInParentBeforeNode(*m_anchorNode);
         return Position(m_anchorNode.get(), 0, PositionIsOffsetInAnchor);
     }
     if (!m_anchorNode->offsetInCharacters()
         && (m_anchorType == PositionIsAfterAnchor || m_anchorType == PositionIsAfterChildren || static_cast<unsigned>(m_offset) == m_anchorNode->countChildren())
         && (editingIgnoresContent(m_anchorNode.get()) || isRenderedTableElement(m_anchorNode.get()))
         && containerNode()) {
-        return positionInParentAfterNode(m_anchorNode.get());
+        return positionInParentAfterNode(*m_anchorNode);
     }
 
     return Position(containerNode(), computeOffsetInContainerNode(), PositionIsOffsetInAnchor);
 }
 
 Node* Position::computeNodeBeforePosition() const
 {
     if (!m_anchorNode)
         return 0;
 
@@ skipping 1156 matching lines @@
     pos.showTreeForThis();
 }
 
 void showTree(const WebCore::Position* pos)
 {
     if (pos)
         pos->showTreeForThis();
 }
 
 #endif