Replace TOUCH_UI condition in WebUI with dynamic flag.

chrome/browser/resources/options/language_options.js

 // Copyright (c) 2011 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;
   const LanguageList = options.LanguageList;
@@ skipping 59 matching lines @@
         // the URL hash (ex. lang_add=ja).  Used for automated testing.
         var match = document.location.hash.match(/\blang_add=([\w-]+)/);
         if (match) {
           var addLanguageCode = match[1];
           $('language-options-list').addLanguage(addLanguageCode);
         } else {
           OptionsPage.navigateToPage('addLanguage');
         }
       };
 
-      if (cr.isChromeOS && !cr.isTouch) {
+      if (cr.isChromeOS) {
         // Listen to user clicks on the add language list.
         var addLanguageList = $('add-language-overlay-language-list');
         addLanguageList.addEventListener('click',
             this.handleAddLanguageListClick_.bind(this));
       } else {
         // Listen to add language dialog ok button.
         var addLanguageOkButton = $('add-language-overlay-ok-button');
         addLanguageOkButton.addEventListener('click',
             this.handleAddLanguageOkButtonClick_.bind(this));
 
-        // Listen to user clicks on the "Change touch keyboard settings..."
-        // button.
-        if (cr.isChromeOS && cr.isTouch) {
-          var virtualKeyboardButton = $('language-options-virtual-keyboard');
-          // TODO(yusukes): would be better to hide the button if no virtual
-          // keyboard is registered.
-          virtualKeyboardButton.onclick = function(e) {
-            OptionsPage.navigateToPage('virtualKeyboards');
-          };
-        } else {
-          // Show experimental features if enabled.
-          if (templateData.experimentalSpellCheckFeatures == 'true')
-            $('auto-spell-correction-option').hidden = false;
-        }
-      }
+        // Show experimental features if enabled.
+        if (templateData.experimentalSpellCheckFeatures == 'true')
+          $('auto-spell-correction-option').hidden = false;
 
-      if(!cr.isChromeOS) {
         // Handle spell check enable/disable.
         Preferences.getInstance().addEventListener(this.enableSpellCheckPref,
             this.updateEnableSpellCheck_.bind(this));
       }
+
+      // 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 682 matching lines @@
   LanguageOptions.uiLanguageSaved = function() {
     $('language-options-ui-language-button').style.display = 'none';
     $('language-options-ui-notification-bar').style.display = 'block';
   };
 
   // Export
   return {
     LanguageOptions: LanguageOptions
   };
 });