Remove unneeded uses of base/ref_counted.h.

chrome/browser/autocomplete/history_url_provider.h

 // Copyright (c) 2006-2008 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.
 
 #ifndef CHROME_BROWSER_AUTOCOMPLETE_HISTORY_URL_PROVIDER_H_
 #define CHROME_BROWSER_AUTOCOMPLETE_HISTORY_URL_PROVIDER_H_
 
 #include <map>
 #include <vector>
 #include <deque>
 
-#include "base/ref_counted.h"
 #include "chrome/browser/autocomplete/autocomplete.h"
 #include "chrome/browser/history/history_database.h"
 #include "chrome/browser/profile.h"
 
 class HistoryService;
 class MessageLoop;
 
 namespace history {
 
 class HistoryBackend;
@@ skipping 361 matching lines @@
   const Prefixes prefixes_;
 
   // Params for the current query.  The provider should not free this directly;
   // instead, it is passed as a parameter through the history backend, and the
   // parameter itself is freed once it's no longer needed.  The only reason we
   // keep this member is so we can set the cancel bit on it.
   HistoryURLProviderParams* params_;
 };
 
 #endif  // CHROME_BROWSER_AUTOCOMPLETE_HISTORY_URL_PROVIDER_H_