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

Source/web/WebPluginScrollbarImpl.cpp

 /*
  * Copyright (C) 2012 Google 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 23 matching lines @@
 #include "public/platform/WebCanvas.h"
 #include "public/platform/WebRect.h"
 #include "public/platform/WebVector.h"
 #include "public/web/WebInputEvent.h"
 #include "public/web/WebPluginScrollbarClient.h"
 #include "web/ScrollbarGroup.h"
 #include "web/WebInputEventConversion.h"
 #include "web/WebPluginContainerImpl.h"
 #include "web/WebViewImpl.h"
 
-using namespace std;
 using namespace WebCore;
 
 namespace blink {
 
 WebPluginScrollbar* WebPluginScrollbar::createForPlugin(Orientation orientation,
                                                         WebPluginContainer* pluginContainer,
                                                         WebPluginScrollbarClient* client)
 {
     WebPluginContainerImpl* plugin = toWebPluginContainerImpl(pluginContainer);
     return new WebPluginScrollbarImpl(orientation, plugin->scrollbarGroup(), client);
@@ skipping 35 matching lines @@
     webrect.x += m_scrollbar->x();
     webrect.y += m_scrollbar->y();
     m_client->invalidateScrollbarRect(this, webrect);
 }
 
 void WebPluginScrollbarImpl::getTickmarks(Vector<IntRect>& tickmarks) const
 {
     WebVector<WebRect> ticks;
     m_client->getTickmarks(const_cast<WebPluginScrollbarImpl*>(this), &ticks);
     tickmarks.resize(ticks.size());
-    for (size_t i = 0; i < ticks.size(); ++i)
+    for (std::size_t i = 0; i < ticks.size(); ++i)
         tickmarks[i] = ticks[i];
 }
 
 IntPoint WebPluginScrollbarImpl::convertFromContainingViewToScrollbar(const IntPoint& parentPoint) const
 {
     IntPoint offset(parentPoint.x() - m_scrollbar->x(), parentPoint.y() - m_scrollbar->y());
     return m_scrollbar->Widget::convertFromContainingView(offset);
 }
 
 void WebPluginScrollbarImpl::scrollbarStyleChanged()
@@ skipping 254 matching lines @@
     WebCore::ScrollDirection scrollDirection;
     WebCore::ScrollGranularity scrollGranularity;
     if (WebViewImpl::mapKeyCodeForScroll(keyCode, &scrollDirection, &scrollGranularity)) {
         // Will return false if scroll direction wasn't compatible with this scrollbar.
         return m_group->scroll(scrollDirection, scrollGranularity);
     }
     return false;
 }
 
 } // namespace blink