Move handling of dialog preferences to Preferences class

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 611 matching lines @@
 
     /**
      * Handles spellCheckLanguageButton click.
      * @param {Event} e Click event.
      * @private
      */
     handleSpellCheckLanguageButtonClick_: function(e) {
       var languageCode = e.target.languageCode;
       // Save the preference.
       Preferences.setStringPref(this.spellCheckDictionaryPref,
-                                languageCode);
+                                languageCode,
+                                true);
       chrome.send('spellCheckLanguageChange', [languageCode]);
     },
 
     /**
      * Checks whether it's possible to remove the language specified by
      * languageCode and returns true if possible. This function returns false
      * if the removal causes the number of preload engines to be zero.
      *
      * @param {string} languageCode Language code (ex. "fr").
      * @return {boolean} Returns true on success.
@@ skipping 40 matching lines @@
       // engines to be zero.
       return (newPreloadEngines.length > 0);
     },
 
     /**
      * Saves the preload engines preference.
      * @private
      */
     savePreloadEnginesPref_: function() {
       Preferences.setStringPref(this.preloadEnginesPref,
-                                this.preloadEngines_.join(','));
+                                this.preloadEngines_.join(','),
+                                true);
     },
 
     /**
      * Updates the checkboxes in the input method list from the preload
      * engines preference.
      * @private
      */
     updateCheckboxesFromPreloadEngines_: function() {
       // Convert the list into a dictonary for simpler lookup.
       var dictionary = {};
@@ skipping 147 matching lines @@
     // only take effect after restart.
     showMutuallyExclusiveNodes([$('language-options-ui-language-button'),
                                 $('language-options-ui-notification-bar')], 1);
   };
 
   // Export
   return {
     LanguageOptions: LanguageOptions
   };
 });