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

Source/core/accessibility/AXTableCell.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 14 matching lines @@
  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
 #include "config.h"
 #include "core/accessibility/AXTableCell.h"
 
 #include "core/accessibility/AXObjectCache.h"
 #include "core/rendering/RenderTableCell.h"
 
-using namespace std;
 
 namespace WebCore {
 
 using namespace HTMLNames;
 
 AXTableCell::AXTableCell(RenderObject* renderer)
     : AXRenderObject(renderer)
 {
 }
 
@@ skipping 123 matching lines @@
         return 0;
 
     Node* cellElement = headerCell->node();
     if (!cellElement || !cellElement->hasTagName(thTag))
         return 0;
 
     return axObjectCache()->getOrCreate(headerCell);
 }
 
 } // namespace WebCore