Oilpan: add Element/Node Member fields to stack allocated objects.

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 60 matching lines @@
 }
 
 void PositionIterator::decrement()
 {
     if (!m_anchorNode)
         return;
 
     if (m_nodeAfterPositionInAnchor) {
         m_anchorNode = m_nodeAfterPositionInAnchor->previousSibling();
         if (m_anchorNode) {
-            m_nodeAfterPositionInAnchor = 0;
+            m_nodeAfterPositionInAnchor = nullptr;
             m_offsetInAnchor = m_anchorNode->hasChildren() ? 0 : lastOffsetForEditing(m_anchorNode);
         } else {
             m_nodeAfterPositionInAnchor = m_nodeAfterPositionInAnchor->parentNode();
             m_anchorNode = m_nodeAfterPositionInAnchor->parentNode();
             m_offsetInAnchor = 0;
         }
         return;
     }
 
     if (m_anchorNode->hasChildren()) {
@@ skipping 81 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