Add a lock to the managed user settings page and require authentication for unlocking.

chrome/browser/resources/options/options_bundle.js

 // 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.
 //
 // This file exists to aggregate all of the javascript used by the
 // settings page into a single file which will be flattened and served
 // as a single resource.
 <include src="preferences.js"></include>
 <include src="options_bubble.js"></include>
 <include src="controlled_setting.js"></include>
@@ skipping 55 matching lines @@
 <include src="clear_browser_data_overlay.js"></include>
 <include src="confirm_dialog.js"></include>
 <include src="content_settings.js"></include>
 <include src="content_settings2.js"></include>
 <include src="content_settings_exceptions_area.js"></include>
 <include src="content_settings_ui.js"></include>
 <include src="cookies_list.js"></include>
 <include src="cookies_view.js"></include>
 <include src="factory_reset_overlay.js"></include>
 <include src="managed_user_settings.js"></include>
+<include src="managed_user_set_passphrase.js"></include>
 <include src="font_settings.js"></include>
 <include src="handler_options.js"></include>
 <include src="handler_options_list.js"></include>
 <include src="home_page_overlay.js"></include>
 <include src="import_data_overlay.js"></include>
 <include src="language_add_language_overlay.js"></include>
 <if expr="not is_macosx">
   <include src="language_dictionary_overlay_word_list.js"></include>
   <include src="language_dictionary_overlay.js"></include>
 </if>
 <include src="language_list.js"></include>
 <include src="language_options.js"></include>
 <include src="manage_profile_overlay.js"></include>
 <include src="media_galleries_list.js"></include>
 <include src="media_galleries_manager_overlay.js"></include>
 <include src="options_focus_manager.js"></include>
 <include src="password_manager.js"></include>
 <include src="password_manager_list.js"></include>
 <include src="profiles_icon_grid.js"></include>
 <include src="search_engine_manager.js"></include>
 <include src="search_engine_manager_engine_list.js"></include>
 <include src="search_page.js"></include>
 <include src="startup_overlay.js"></include>
 <include src="../sync_setup_overlay.js"></include>
 <include src="../uber/uber_utils.js"></include>
 <include src="options.js"></include>
 <if expr="pp_ifdef('enable_settings_app')">
   <include src="options_settings_app.js"></include>
 </if>