Remove virtual keyboard support.

chrome/browser/resources/options2/language_options.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.
 
 // TODO(kochi): Generalize the notification as a component and put it
 // in js/cr/ui/notification.js .
 
 cr.define('options', function() {
   /** @const */ var OptionsPage = options.OptionsPage;
   /** @const */ var LanguageList = options.LanguageList;
@@ skipping 100 matching lines @@
         }
       }
 
       if (cr.isChromeOS) {
         $('language-options-ui-restart-button').onclick =
             chrome.send.bind(chrome, 'uiLanguageRestart');
       }
 
       $('language-confirm').onclick =
           OptionsPage.closeOverlay.bind(OptionsPage);
-
-      // Listen to user clicks on the "Change touch keyboard settings..."
-      // button (if it exists).
-      var virtualKeyboardButton = $('language-options-virtual-keyboard');
-      if (virtualKeyboardButton) {
-        // TODO(yusukes): would be better to hide the button if no virtual
-        // keyboard is registered.
-        virtualKeyboardButton.onclick = function(e) {
-          OptionsPage.navigateToPage('virtualKeyboards');
-        };
-      }
     },
 
     // The preference is a boolean that enables/disables spell checking.
     enableSpellCheckPref: 'browser.enable_spellchecking',
     // The preference is a CSV string that describes preload engines
     // (i.e. active input methods).
     preloadEnginesPref: 'settings.language.preload_engines',
     // The list of preload engines, like ['mozc', 'pinyin'].
     preloadEngines_: [],
     // The preference is a string that describes the spell check
@@ skipping 711 matching lines @@
     // only take effect after restart.
     showMutuallyExclusiveNodes([$('language-options-ui-language-button'),
                                 $('language-options-ui-notification-bar')], 1);
   };
 
   // Export
   return {
     LanguageOptions: LanguageOptions
   };
 });