Make rendersInDifferentPosition() to work with AfterAnchor and AfterChildren positions properly

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 1036 matching lines @@
         return false;
 
     if (layoutObject->style()->visibility() != VISIBLE
         || posLayoutObject->style()->visibility() != VISIBLE)
         return false;
 
     if (anchorNode() == pos.anchorNode()) {
         if (isHTMLBRElement(*anchorNode()))
             return false;
 
-        if (m_offset == pos.deprecatedEditingOffset())
+        if (deprecatedEditingOffset() == pos.deprecatedEditingOffset())
             return false;
 
         if (!anchorNode()->isTextNode() && !pos.anchorNode()->isTextNode()) {
-            if (m_offset != pos.deprecatedEditingOffset())
+            if (deprecatedEditingOffset() != pos.deprecatedEditingOffset())
                 return true;
         }
     }
 
     if (isHTMLBRElement(*anchorNode()) && pos.isCandidate())
         return true;
 
     if (isHTMLBRElement(*pos.anchorNode()) && isCandidate())
         return true;
 
@@ skipping 452 matching lines @@
 
 void showTree(const blink::Position* pos)
 {
     if (pos)
         pos->showTreeForThis();
     else
         fprintf(stderr, "Cannot showTree for (nil)\n");
 }
 
 #endif