Get rid of redundant member function PositionAlgorithm<Strategy>::{upstream,downstream}

Source/core/editing/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 449 matching lines @@
 bool PositionAlgorithm<Strategy>::atEndOfTree() const
 {
     if (isNull())
         return true;
     // TODO(yosin) We should use |Strategy::lastOffsetForEditing()| instead of
     // DOM tree version.
     return !Strategy::parent(*anchorNode()) && m_offset >= EditingStrategy::lastOffsetForEditing(anchorNode());
 }
 
 template <typename Strategy>
-PositionAlgorithm<Strategy> PositionAlgorithm<Strategy>::upstream(EditingBoundaryCrossingRule rule) const
-{
-    return mostBackwardCaretPosition(*this, rule);
-}
-
-template <typename Strategy>
-PositionAlgorithm<Strategy> PositionAlgorithm<Strategy>::downstream(EditingBoundaryCrossingRule rule) const
-{
-    return mostForwardCaretPosition(*this, rule);
-}
-
-template <typename Strategy>
 void PositionAlgorithm<Strategy>::debugPosition(const char* msg) const
 {
     static const char* const anchorTypes[] = {
         "OffsetInAnchor",
         "BeforeAnchor",
         "AfterAnchor",
         "BeforeChildren",
         "AfterChildren",
         "Invalid",
     };
@@ skipping 162 matching lines @@
 
 void showTree(const blink::Position* pos)
 {
     if (pos)
         pos->showTreeForThis();
     else
         fprintf(stderr, "Cannot showTree for (nil)\n");
 }
 
 #endif