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

Source/core/html/HTMLSourceElement.cpp

 /*
  * Copyright (C) 2007, 2008, 2010 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 14 matching lines @@
 
 #include "config.h"
 #include "core/html/HTMLSourceElement.h"
 
 #include "HTMLNames.h"
 #include "core/events/EventSender.h"
 #include "core/html/HTMLMediaElement.h"
 #include "core/html/HTMLPictureElement.h"
 #include "platform/Logging.h"
 
-using namespace std;
-
 namespace WebCore {
 
 using namespace HTMLNames;
 
 static SourceEventSender& sourceErrorEventSender()
 {
     DEFINE_STATIC_LOCAL(SourceEventSender, sharedErrorEventSender, (EventTypeNames::error));
     return sharedErrorEventSender;
 }
 
@@ skipping 77 matching lines @@
 {
     HTMLElement::parseAttribute(name, value);
     if (name == srcsetAttr || name == sizesAttr || name == mediaAttr || name == typeAttr) {
         Element* parent = parentElement();
         if (isHTMLPictureElement(parent))
             toHTMLPictureElement(parent)->sourceOrMediaChanged();
     }
 }
 
 }