Rewrite references to "wtf/" to "platform/wtf/" in web.

third_party/WebKit/Source/web/WebMetaElement.cpp

 // Copyright 2015 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "public/web/WebMetaElement.h"
 
 #include "core/HTMLNames.h"
 #include "core/html/HTMLMetaElement.h"
+#include "platform/wtf/PassRefPtr.h"
 #include "public/platform/WebString.h"
-#include "wtf/PassRefPtr.h"
 
 namespace blink {
 
 WebString WebMetaElement::computeEncoding() const {
   return String(constUnwrap<HTMLMetaElement>()->computeEncoding().name());
 }
 
 WebMetaElement::WebMetaElement(HTMLMetaElement* element)
     : WebElement(element) {}
 
 DEFINE_WEB_NODE_TYPE_CASTS(WebMetaElement,
                            isHTMLMetaElement(constUnwrap<Node>()));
 
 WebMetaElement& WebMetaElement::operator=(HTMLMetaElement* element) {
   m_private = element;
   return *this;
 }
 
 WebMetaElement::operator HTMLMetaElement*() const {
   return toHTMLMetaElement(m_private.get());
 }
 
 }  // namespace blink