Use a direct include of strings headers in chrome/browser/chromeos/.

chrome/browser/chromeos/customization_document.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/chromeos/customization_document.h"
 
 #include "base/bind.h"
 #include "base/bind_helpers.h"
 #include "base/file_util.h"
 #include "base/files/file_path.h"
 #include "base/json/json_reader.h"
 #include "base/logging.h"
 #include "base/prefs/pref_registry_simple.h"
 #include "base/prefs/pref_service.h"
-#include "base/string_util.h"
+#include "base/strings/string_util.h"
 #include "base/strings/utf_string_conversions.h"
 #include "base/time.h"
 #include "chrome/browser/browser_process.h"
 #include "chrome/browser/chromeos/login/wizard_controller.h"
 #include "chrome/browser/chromeos/system/statistics_provider.h"
 #include "chrome/browser/profiles/profile_manager.h"
 #include "chromeos/network/network_state.h"
 #include "chromeos/network/network_state_handler.h"
 #include "content/public/browser/browser_thread.h"
 #include "net/url_request/url_fetcher.h"
@@ skipping 312 matching lines @@
       locale, kAppContentAttr, kInitialStartPageAttr);
 }
 
 std::string ServicesCustomizationDocument::GetSupportPage(
     const std::string& locale) const {
   return GetLocaleSpecificString(
       locale, kAppContentAttr, kSupportPageAttr);
 }
 
 }  // namespace chromeos