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

Source/core/editing/markup.cpp

 /*
  * Copyright (C) 2004, 2005, 2006, 2007, 2008, 2009 Apple Inc. All rights reserved.
  * Copyright (C) 2008, 2009, 2010, 2011 Google Inc. All rights reserved.
  * Copyright (C) 2011 Igalia S.L.
  * Copyright (C) 2011 Motorola Mobility. 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
@@ skipping 42 matching lines @@
 #include "core/frame/LocalFrame.h"
 #include "core/html/HTMLBodyElement.h"
 #include "core/html/HTMLElement.h"
 #include "core/html/HTMLTableCellElement.h"
 #include "core/html/HTMLTextFormControlElement.h"
 #include "core/rendering/RenderObject.h"
 #include "platform/weborigin/KURL.h"
 #include "wtf/StdLibExtras.h"
 #include "wtf/text/StringBuilder.h"
 
+using namespace std;
+
 namespace WebCore {
 
 using namespace HTMLNames;
 
 static bool propertyMissingOrEqualToNone(StylePropertySet*, CSSPropertyID);
 
 class AttributeChange {
     ALLOW_ONLY_INLINE_ALLOCATION();
 public:
     AttributeChange()
@@ skipping 1004 matching lines @@
         return;
 
     RefPtrWillBeRawPtr<Text> textNode = toText(node.get());
     RefPtrWillBeRawPtr<Text> textNext = toText(next);
     textNode->appendData(textNext->data());
     if (textNext->parentNode()) // Might have been removed by mutation event.
         textNext->remove(exceptionState);
 }
 
 }