options: Remove a bunch of useless:

chrome/browser/resources/options/alert_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;
 
   /**
    * AlertOverlay class
    * Encapsulated handling of a generic alert.
    * @class
    */
   function AlertOverlay() {
     OptionsPage.call(this, 'alertOverlay', '', 'alertOverlay');
   }
 
   cr.addSingletonGetter(AlertOverlay);
 
   AlertOverlay.prototype = {
     // Inherit AlertOverlay from OptionsPage.
     __proto__: OptionsPage.prototype,
 
     /**
      * Whether the page can be shown. Used to make sure the page is only
      * shown via AlertOverlay.Show(), and not via the address bar.
      * @private
      */
     canShow_: false,
 
-    /**
-     * Initialize the page.
-     */
+    /** @override */
     initializePage: function() {
       // Call base class implementation to start preference initialization.
       OptionsPage.prototype.initializePage.call(this);
 
       var self = this;
       $('alertOverlayOk').onclick = function(event) {
         self.handleOK_();
       };
 
       $('alertOverlayCancel').onclick = function(event) {
@@ skipping 28 matching lines @@
      */
     handleCancel_: function() {
       OptionsPage.closeOverlay();
       if (this.cancelCallback != undefined) {
         this.cancelCallback.call();
       }
     },
 
     /**
      * The page is getting hidden. Don't let it be shown again.
+     * @override
      */
     willHidePage: function() {
       canShow_ = false;
     },
 
     /** @override */
     canShowPage: function() {
       return this.canShow_;
     },
   };
@@ skipping 52 matching lines @@
     // Intentionally don't show the URL in the location bar as we don't want
     // people trying to navigate here by hand.
     OptionsPage.showPageByName('alertOverlay', false);
   };
 
   // Export
   return {
     AlertOverlay: AlertOverlay
   };
 });