Cleanup namespace usage in Source/web/Web[A-H]*.cpp

Source/web/WebElementCollection.cpp

 /*
  * Copyright (C) 2009 Google Inc. All rights reserved.
  * Copyright (C) 2014 Samsung Electronics. 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.
@@ skipping 19 matching lines @@
  */
 
 #include "config.h"
 #include "public/web/WebElementCollection.h"
 
 #include "core/dom/Element.h"
 #include "core/html/HTMLCollection.h"
 #include "public/web/WebElement.h"
 #include "wtf/PassRefPtr.h"
 
-using namespace blink;
-
 namespace blink {
 
 void WebElementCollection::reset()
 {
     m_private.reset();
 }
 
 void WebElementCollection::assign(const WebElementCollection& other)
 {
     m_private = other.m_private;
@@ skipping 23 matching lines @@
     return WebElement(element);
 }
 
 WebElement WebElementCollection::firstItem() const
 {
     m_current = 0;
     return nextItem();
 }
 
 } // namespace blink