ChromeOS OOBE: Add ARIA-labels for OOBE screens.

chrome/browser/resources/chromeos/login/oobe_screen_network.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.
 
 /**
  * @fileoverview Oobe network screen implementation.
  */
 
 login.createScreen('NetworkScreen', 'connect', function() {
   var USER_ACTION_CONTINUE_BUTTON_CLICKED = 'continue';
@@ skipping 25 matching lines @@
       Oobe.setupSelect($('timezone-select'),
                        loadTimeData.getValue('timezoneList'),
                        this.onTimezoneSelected_.bind(this));
 
       // ---------- Welcome screen
       var welcomeScreen = $('oobe-welcome-md');
       welcomeScreen.screen = this;
 
       var languageList = loadTimeData.getValue('languageList');
       welcomeScreen.languages = languageList;
-      welcomeScreen.currentLanguage = Oobe.getSelectedTitle(languageList);
 
       var inputMethodsList = loadTimeData.getValue('inputMethodsList');
       welcomeScreen.keyboards = inputMethodsList;
 
       var timezoneList = loadTimeData.getValue('timezoneList');
       welcomeScreen.timezones = timezoneList;
 
       welcomeScreen.highlightStrength =
           loadTimeData.getValue('highlightStrength');
       // -------------------------
@@ skipping 120 matching lines @@
      */
     setMDMode_: function() {
       var useMDOobe = (loadTimeData.getString('newOobeUI') == 'on');
 
       $('oobe-connect').hidden = useMDOobe;
       $('oobe-welcome-md').hidden = !useMDOobe;
 
       if (useMDOobe) {
         var welcomeScreen = $('oobe-welcome-md');
         var languageList = loadTimeData.getValue('languageList');
-        welcomeScreen.currentLanguage = Oobe.getSelectedTitle(languageList);
         welcomeScreen.languages = languageList;
 
         welcomeScreen.keyboards = loadTimeData.getValue('inputMethodsList');
         welcomeScreen.enabled = true;
 
         var timezoneList = loadTimeData.getValue('timezoneList');
         welcomeScreen.timezones = timezoneList;
 
         welcomeScreen.highlightStrength =
             loadTimeData.getValue('highlightStrength');
       }
     },
   };
 });