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

Source/core/frame/LocalFrame.cpp

 /*
  * Copyright (C) 1998, 1999 Torben Weis <weis@kde.org>
  *                     1999 Lars Knoll <knoll@kde.org>
  *                     1999 Antti Koivisto <koivisto@kde.org>
  *                     2000 Simon Hausmann <hausmann@kde.org>
  *                     2000 Stefan Schimanski <1Stein@gmx.de>
  *                     2001 George Staikos <staikos@kde.org>
  * Copyright (C) 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011 Apple Inc. All rights reserved.
  * Copyright (C) 2005 Alexey Proskuryakov <ap@nypop.com>
  * Copyright (C) 2008 Nokia Corporation and/or its subsidiary(-ies)
@@ skipping 48 matching lines @@
 #include "core/rendering/RenderView.h"
 #include "core/rendering/compositing/RenderLayerCompositor.h"
 #include "core/svg/SVGDocumentExtensions.h"
 #include "platform/DragImage.h"
 #include "platform/graphics/GraphicsContext.h"
 #include "platform/graphics/ImageBuffer.h"
 #include "platform/text/TextStream.h"
 #include "wtf/PassOwnPtr.h"
 #include "wtf/StdLibExtras.h"
 
+using namespace std;
+
 namespace WebCore {
 
 using namespace HTMLNames;
 
 static inline float parentPageZoomFactor(LocalFrame* frame)
 {
     Frame* parent = frame->tree().parent();
     if (!parent || !parent->isLocalFrame())
         return 1;
     return toLocalFrame(parent)->pageZoomFactor();
@@ skipping 137 matching lines @@
     return document()->printing() && (!tree().parent() || !tree().parent()->isLocalFrame() || !toLocalFrame(tree().parent())->document()->printing());
 }
 
 FloatSize LocalFrame::resizePageRectsKeepingRatio(const FloatSize& originalSize, const FloatSize& expectedSize)
 {
     FloatSize resultSize;
     if (!contentRenderer())
         return FloatSize();
 
     if (contentRenderer()->style()->isHorizontalWritingMode()) {
-        ASSERT(fabs(originalSize.width()) > std::numeric_limits<float>::epsilon());
+        ASSERT(fabs(originalSize.width()) > numeric_limits<float>::epsilon());
         float ratio = originalSize.height() / originalSize.width();
         resultSize.setWidth(floorf(expectedSize.width()));
         resultSize.setHeight(floorf(resultSize.width() * ratio));
     } else {
-        ASSERT(fabs(originalSize.height()) > std::numeric_limits<float>::epsilon());
+        ASSERT(fabs(originalSize.height()) > numeric_limits<float>::epsilon());
         float ratio = originalSize.width() / originalSize.height();
         resultSize.setHeight(floorf(expectedSize.height()));
         resultSize.setWidth(floorf(resultSize.height() * ratio));
     }
     return resultSize;
 }
 
 void LocalFrame::setDOMWindow(PassRefPtrWillBeRawPtr<DOMWindow> domWindow)
 {
     InspectorInstrumentation::frameWindowDiscarded(this, m_domWindow.get());
@@ skipping 412 matching lines @@
 LocalFrame* LocalFrame::localFrameRoot()
 {
     LocalFrame* curFrame = this;
     while (curFrame && curFrame->tree().parent() && curFrame->tree().parent()->isLocalFrame())
         curFrame = toLocalFrame(curFrame->tree().parent());
 
     return curFrame;
 }
 
 } // namespace WebCore