Convert alert() to notification bar.

chrome/browser/resources/options/chromeos_language_options.js

 // Copyright (c) 2010 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.
 
 // TODO(kochi): Generalize the notification as a component and put it
 // in js/cr/ui/notification.js .
 
 cr.define('options', function() {
 
   const OptionsPage = options.OptionsPage;
@@ skipping 394 matching lines @@
 
     /**
      * Handles remove button's click event.
      * @param {Event} e Click event.
      */
     handleRemoveButtonClick_: function(e) {
       var languageOptionsList = $('language-options-list');
       var languageCode = languageOptionsList.getSelectedLanguageCode();
       // Don't allow removing the language if it's as UI language.
       if (languageCode == templateData.currentUiLanguageCode) {
-        // TODO(satorux): Show the message in a nicer way. See above.
-        alert(localStrings.getString('this_language_is_currently_in_use'));
+        this.showNotification_(
+            localStrings.getString('this_language_is_currently_in_use'),
+            localStrings.getString('ok_button'));
         return;
       }
       // Disable input methods associated with |languageCode|.
       // Don't allow removing the language if cerntain conditions are met.
       // See removePreloadEnginesByLanguageCode_() for details.
       if (!this.removePreloadEnginesByLanguageCode_(languageCode)) {
         this.showNotification_(
             localStrings.getString('please_add_another_language'),
             localStrings.getString('ok_button'));
         return;
@@ skipping 195 matching lines @@
     $('language-options-ui-language-button').style.display = 'none';
     $('language-options-ui-notification-bar').style.display = 'block';
   };
 
   // Export
   return {
     LanguageOptions: LanguageOptions
   };
 
 });