Cleanup namespace usage in Source/web/Web[I-Z]*.cpp

Source/web/WebMediaDevicesRequest.cpp

 /*
  * Copyright (C) 2014 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 19 matching lines @@
 #include "core/dom/Document.h"
 #include "modules/mediastream/MediaDevicesRequest.h"
 #include "platform/weborigin/SecurityOrigin.h"
 #include "public/platform/WebMediaDeviceInfo.h"
 #include "public/platform/WebString.h"
 #include "public/platform/WebVector.h"
 #include "public/web/WebDocument.h"
 #include "public/web/WebSecurityOrigin.h"
 #include "wtf/Vector.h"
 
-using namespace blink;
-
 namespace blink {
 
 WebMediaDevicesRequest::WebMediaDevicesRequest(MediaDevicesRequest* request)
     : m_private(request)
 {
 }
 
 void WebMediaDevicesRequest::reset()
 {
     m_private.reset();
@@ skipping 33 matching lines @@
 {
     m_private = other.m_private;
 }
 
 WebMediaDevicesRequest::operator MediaDevicesRequest*() const
 {
     return m_private.get();
 }
 
 } // namespace blink