options: Remove a bunch of useless:

chrome/browser/resources/options/import_data_overlay.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.
 
 cr.define('options', function() {
   var OptionsPage = options.OptionsPage;
 
   /**
    * ImportDataOverlay class
    * Encapsulated handling of the 'Import Data' overlay page.
    * @class
    */
   function ImportDataOverlay() {
     OptionsPage.call(this,
                      'importData',
                      loadTimeData.getString('importDataOverlayTabTitle'),
                      'import-data-overlay');
   }
 
   cr.addSingletonGetter(ImportDataOverlay);
 
   ImportDataOverlay.prototype = {
     // Inherit from OptionsPage.
     __proto__: OptionsPage.prototype,
 
-    /**
-     * Initialize the page.
-     */
+    /** @override */
     initializePage: function() {
       // Call base class implementation to start preference initialization.
       OptionsPage.prototype.initializePage.call(this);
 
       var self = this;
       var checkboxes =
           document.querySelectorAll('#import-checkboxes input[type=checkbox]');
       for (var i = 0; i < checkboxes.length; i++) {
         checkboxes[i].onchange = function() {
           self.validateCommitButton_();
@@ skipping 226 matching lines @@
     ImportDataOverlay.getInstance().validateCommitButton_();
 
     OptionsPage.navigateToPage('importData');
   };
 
   // Export
   return {
     ImportDataOverlay: ImportDataOverlay
   };
 });