Replace string16 with base::string16.

chrome/browser/autocomplete/history_provider_util.cc

 // Copyright (c) 2012 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 "chrome/browser/autocomplete/history_provider_util.h"
 
 #include "base/logging.h"
 
 namespace history {
 
 HistoryMatch::HistoryMatch()
     : url_info(),
-      input_location(string16::npos),
+      input_location(base::string16::npos),
       match_in_scheme(false),
       innermost_match(true),
       promoted(false) {
 }
 
 HistoryMatch::HistoryMatch(const URLRow& url_info,
                            size_t input_location,
                            bool match_in_scheme,
                            bool innermost_match)
     : url_info(url_info),
       input_location(input_location),
       match_in_scheme(match_in_scheme),
       innermost_match(innermost_match),
       promoted(false) {
 }
 
 bool HistoryMatch::EqualsGURL(const HistoryMatch& h, const GURL& url) {
   return h.url_info.url() == url;
 }
 
 bool HistoryMatch::IsHostOnly() const {
   const GURL& gurl = url_info.url();
   DCHECK(gurl.is_valid());
   return (!gurl.has_path() || (gurl.path() == "/")) && !gurl.has_query() &&
       !gurl.has_ref();
 }
 
 }  // namespace history