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

Source/web/WebInputElement.cpp

 /*
  * Copyright (C) 2009 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 25 matching lines @@
 #include "core/dom/shadow/ShadowRoot.h"
 #include "core/html/HTMLDataListElement.h"
 #include "core/html/HTMLInputElement.h"
 #include "core/html/shadow/ShadowElementNames.h"
 #include "core/html/shadow/TextControlInnerElements.h"
 #include "platform/RuntimeEnabledFeatures.h"
 #include "public/platform/WebString.h"
 #include "public/web/WebElementCollection.h"
 #include "wtf/PassRefPtr.h"
 
-using namespace blink;
-
 namespace blink {
 
 bool WebInputElement::isTextField() const
 {
     return constUnwrap<HTMLInputElement>()->isTextField();
 }
 
 bool WebInputElement::isText() const
 {
     return constUnwrap<HTMLInputElement>()->isText();
@@ skipping 103 matching lines @@
 }
 
 WebInputElement* toWebInputElement(WebElement* webElement)
 {
     if (!isHTMLInputElement(*webElement->unwrap<Element>()))
         return 0;
 
     return static_cast<WebInputElement*>(webElement);
 }
 } // namespace blink