Attempt four at landing the "histogram.h removed from message_loop.h" patch.

chrome/browser/autocomplete/search_provider.h

 // Copyright (c) 2010 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.
 //
 // This file contains the Search autocomplete provider.  This provider is
 // responsible for all non-keyword autocomplete entries that start with
 // "Search <engine> for ...", including searching for the current input string,
 // search history, and search suggestions.  An instance of it gets created and
 // managed by the autocomplete controller.
 //
 // For more information on the autocomplete system in general, including how
 // the autocomplete controller and autocomplete providers work, see
 // chrome/browser/autocomplete.h.
 
 #ifndef CHROME_BROWSER_AUTOCOMPLETE_SEARCH_PROVIDER_H_
 #define CHROME_BROWSER_AUTOCOMPLETE_SEARCH_PROVIDER_H_
 
 #include <map>
 #include <string>
 #include <vector>
 
+#include "base/scoped_ptr.h"
 #include "chrome/browser/autocomplete/autocomplete.h"
 #include "chrome/browser/cancelable_request.h"
 #include "chrome/browser/history/history_types.h"
 #include "chrome/browser/search_engines/template_url.h"
 #include "chrome/common/net/url_fetcher.h"
 
 class Profile;
 class Value;
 
 // Autocomplete provider for searches and suggestions from a search engine.
@@ skipping 286 matching lines @@
   NavigationResults keyword_navigation_results_;
   NavigationResults default_navigation_results_;
 
   // Whether suggest_results_ is valid.
   bool have_suggest_results_;
 
   DISALLOW_COPY_AND_ASSIGN(SearchProvider);
 };
 
 #endif  // CHROME_BROWSER_AUTOCOMPLETE_SEARCH_PROVIDER_H_