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

Source/core/editing/Editor.cpp

 /*
  * Copyright (C) 2006, 2007, 2008, 2011 Apple Inc. All rights reserved.
  * Copyright (C) 2008 Nokia Corporation and/or its subsidiary(-ies)
  *
  * 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 960 matching lines @@
 void Editor::simplifyMarkup(Node* startNode, Node* endNode)
 {
     if (!startNode)
         return;
     if (endNode) {
         if (startNode->document() != endNode->document())
             return;
         // check if start node is before endNode
         Node* node = startNode;
         while (node && node != endNode)
-            node = NodeTraversal::next(node);
+            node = NodeTraversal::next(*node);
         if (!node)
             return;
     }
 
     ASSERT(m_frame.document());
-    SimplifyMarkupCommand::create(*m_frame.document(), startNode, endNode ? NodeTraversal::next(endNode) : 0)->apply();
+    SimplifyMarkupCommand::create(*m_frame.document(), startNode, endNode ? NodeTraversal::next(*endNode) : 0)->apply();
 }
 
 void Editor::copyImage(const HitTestResult& result)
 {
     KURL url = result.absoluteLinkURL();
     if (url.isEmpty())
         url = result.absoluteImageURL();
 
     Pasteboard::generalPasteboard()->writeImage(result.innerNonSharedNode(), url, result.altDisplayString());
 }
@@ skipping 349 matching lines @@
     return spellChecker().isContinuousSpellCheckingEnabled();
 }
 
 void Editor::toggleOverwriteModeEnabled()
 {
     m_overwriteModeEnabled = !m_overwriteModeEnabled;
     frame().selection().setShouldShowBlockCursor(m_overwriteModeEnabled);
 }
 
 } // namespace WebCore