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

Source/web/WebPagePopupImpl.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:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 34 matching lines @@
 #include "core/page/PagePopupClient.h"
 #include "platform/TraceEvent.h"
 #include "public/platform/WebCursorInfo.h"
 #include "public/web/WebViewClient.h"
 #include "public/web/WebWidgetClient.h"
 #include "web/WebInputEventConversion.h"
 #include "web/WebSettingsImpl.h"
 #include "web/WebViewImpl.h"
 
 using namespace WebCore;
-using namespace std;
 
 namespace blink {
 
 class PagePopupChromeClient : public EmptyChromeClient {
     WTF_MAKE_NONCOPYABLE(PagePopupChromeClient);
     WTF_MAKE_FAST_ALLOCATED;
 
 public:
     explicit PagePopupChromeClient(WebPagePopupImpl* popup)
         : m_popup(popup)
@@ skipping 337 matching lines @@
     // A WebPagePopupImpl instance usually has two references.
     //  - One owned by the instance itself. It represents the visible widget.
     //  - One owned by a WebViewImpl. It's released when the WebViewImpl ask the
     //    WebPagePopupImpl to close.
     // We need them because the closing operation is asynchronous and the widget
     // can be closed while the WebViewImpl is unaware of it.
     return adoptRef(new WebPagePopupImpl(client)).leakRef();
 }
 
 } // namespace blink