Replace Manage Languages with dialog and dropdown item

chrome/browser/resources/settings/route.js

 // Copyright 2016 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.
 
 cr.define('settings', function() {
   /**
    * Class for navigable routes. May only be instantiated within this file.
    * @constructor
    * @param {string} path
    * @private
@@ skipping 156 matching lines @@
   r.BLUETOOTH_PAIR_DEVICE =
       r.BLUETOOTH_ADD_DEVICE.createChild('bluetoothPairDevice');
 </if>
 
   r.PASSWORDS = r.ADVANCED.createSection('/passwords', 'passwordsAndForms');
   r.AUTOFILL = r.PASSWORDS.createChild('/autofill');
   r.MANAGE_PASSWORDS = r.PASSWORDS.createChild('/managePasswords');
 
   r.LANGUAGES = r.ADVANCED.createSection('/languages', 'languages');
   r.LANGUAGES_DETAIL = r.LANGUAGES.createChild('edit');
-  r.MANAGE_LANGUAGES = r.LANGUAGES.createChild('/manageLanguages');
 <if expr="chromeos">
   r.INPUT_METHODS = r.LANGUAGES.createChild('/inputMethods');
 </if>
 <if expr="not is_macosx">
   r.EDIT_DICTIONARY = r.LANGUAGES.createChild('/editDictionary');
 </if>
 
   r.DOWNLOADS = r.ADVANCED.createSection('/downloadsDirectory', 'downloads');
 
   r.PRINTING = r.ADVANCED.createSection('/printing', 'printing');
@@ skipping 153 matching lines @@
     Route: Route,
     RouteObserverBehavior: RouteObserverBehavior,
     getRouteForPath: getRouteForPath,
     initializeRouteFromUrl: initializeRouteFromUrl,
     getCurrentRoute: getCurrentRoute,
     getQueryParameters: getQueryParameters,
     navigateTo: navigateTo,
     navigateToPreviousRoute: navigateToPreviousRoute,
   };
 });