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

Source/core/rendering/RenderPart.cpp

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 2000 Simon Hausmann <hausmann@kde.org>
  *           (C) 2000 Stefan Schimanski (1Stein@gmx.de)
  * Copyright (C) 2004, 2005, 2006, 2009 Apple Inc. All rights reserved.
  * Copyright (C) Research In Motion Limited 2011. 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
@@ skipping 16 matching lines @@
 
 #include "core/frame/FrameView.h"
 #include "core/frame/LocalFrame.h"
 #include "core/html/HTMLFrameElementBase.h"
 #include "core/plugins/PluginView.h"
 #include "core/rendering/HitTestResult.h"
 #include "core/rendering/RenderLayer.h"
 #include "core/rendering/RenderView.h"
 #include "core/rendering/svg/RenderSVGRoot.h"
 
-using namespace std;
-
 namespace WebCore {
 
 RenderPart::RenderPart(Element* node)
     : RenderWidget(node)
 {
     setInline(false);
 }
 
 RenderPart::~RenderPart()
 {
@@ skipping 81 matching lines @@
 }
 
 CompositingReasons RenderPart::additionalCompositingReasons(CompositingTriggerFlags) const
 {
     if (requiresAcceleratedCompositing())
         return CompositingReasonIFrame;
     return CompositingReasonNone;
 }
 
 }