Removing using declarations that import names in the C++ Standard library.

Source/core/html/HTMLMapElement.cpp

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  * Copyright (C) 2004, 2005, 2006, 2007, 2010 Apple Inc. All rights reserved.
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Library General Public
  * License as published by the Free Software Foundation; either
  * version 2 of the License, or (at your option) any later version.
  *
@@ skipping 12 matching lines @@
 #include "core/html/HTMLMapElement.h"
 
 #include "HTMLNames.h"
 #include "core/dom/Document.h"
 #include "core/dom/ElementTraversal.h"
 #include "core/html/HTMLAreaElement.h"
 #include "core/html/HTMLCollection.h"
 #include "core/html/HTMLImageElement.h"
 #include "core/rendering/HitTestResult.h"
 
-using namespace std;
-
 namespace WebCore {
 
 using namespace HTMLNames;
 
 inline HTMLMapElement::HTMLMapElement(Document& document)
     : HTMLElement(mapTag, document)
 {
     ScriptWrappable::init(this);
 }
 
@@ skipping 79 matching lines @@
 }
 
 void HTMLMapElement::removedFrom(ContainerNode* insertionPoint)
 {
     if (insertionPoint->inDocument())
         treeScope().removeImageMap(this);
     HTMLElement::removedFrom(insertionPoint);
 }
 
 }