Fix profile resetter Omaha request:

chrome/browser/profile_resetter/brandcode_config_fetcher.h

 // Copyright 2013 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_PROFILE_RESETTER_BRANDCODE_CONFIG_FETCHER_H_
 #define CHROME_BROWSER_PROFILE_RESETTER_BRANDCODE_CONFIG_FETCHER_H_
 
 #include <memory>
+#include <string>
 #include <utility>
 
 #include "base/callback.h"
 #include "base/macros.h"
 #include "base/timer/timer.h"
 #include "net/url_request/url_fetcher_delegate.h"
 
 class BrandcodedDefaultSettings;
 class GURL;
 
@@ skipping 33 matching lines @@
   // Helper to fetch the online config file.
   std::unique_ptr<net::URLFetcher> config_fetcher_;
 
   // Fetched settings.
   std::unique_ptr<BrandcodedDefaultSettings> default_settings_;
 
   DISALLOW_COPY_AND_ASSIGN(BrandcodeConfigFetcher);
 };
 
 #endif  // CHROME_BROWSER_PROFILE_RESETTER_BRANDCODE_CONFIG_FETCHER_H_