Removing "using" delclarations that import names from the STL library.

Source/core/accessibility/AXTableColumn.cpp

 /*
  * Copyright (C) 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
@@ skipping 15 matching lines @@
  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
 #include "config.h"
 #include "core/accessibility/AXTableColumn.h"
 
 #include "core/accessibility/AXObjectCache.h"
 #include "core/accessibility/AXTableCell.h"
 #include "core/rendering/RenderTableCell.h"
 
-using namespace std;
 
 namespace WebCore {
 
 using namespace HTMLNames;
 
 AXTableColumn::AXTableColumn()
 {
 }
 
 AXTableColumn::~AXTableColumn()
@@ skipping 129 matching lines @@
         // make sure the last one isn't the same as this one (rowspan cells)
         if (m_children.size() > 0 && m_children.last() == cell)
             continue;
 
         m_children.append(cell);
         m_columnRect.unite(cell->elementRect());
     }
 }
 
 } // namespace WebCore