Have ElementTraversal / NodeTraversal's next() methods take a reference

Source/core/editing/TextIterator.cpp

 /*
  * Copyright (C) 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2012 Apple Inc. All rights reserved.
  * Copyright (C) 2005 Alexey Proskuryakov.
  *
  * 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
@@ skipping 368 matching lines @@
             }
         }
 
         // find a new current node to handle in depth-first manner,
         // calling exitNode() as we come back thru a parent node
         Node* next = m_handledChildren ? 0 : m_node->firstChild();
         m_offset = 0;
         if (!next) {
             next = m_node->nextSibling();
             if (!next) {
-                bool pastEnd = NodeTraversal::next(m_node) == m_pastEndNode;
+                bool pastEnd = NodeTraversal::next(*m_node) == m_pastEndNode;
                 Node* parentNode = m_node->parentOrShadowHostNode();
                 while (!next && parentNode) {
                     if ((pastEnd && parentNode == m_endContainer) || m_endContainer->isDescendantOf(parentNode))
                         return;
                     bool haveRenderer = m_node->renderer();
                     m_node = parentNode;
                     m_fullyClippedStack.pop();
                     parentNode = m_node->parentOrShadowHostNode();
                     if (haveRenderer)
                         exitNode();
@@ skipping 1925 matching lines @@
         if (!matchLength)
             return collapsedToBoundary(range, !(options & Backwards));
     }
 
     // Then, find the document position of the start and the end of the text.
     CharacterIterator computeRangeIterator(range, TextIteratorEntersTextControls);
     return characterSubrange(computeRangeIterator, matchStart, matchLength);
 }
 
 }