Typecheck chrome://help using CompilerPass.java, everything except dependency to options

chrome/browser/resources/help/help_page.js

 // Copyright 2014 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('help', function() {
   var Page = cr.ui.pageManager.Page;
   var PageManager = cr.ui.pageManager.PageManager;
 
   /**
    * Encapsulated handling of the About page. Called 'help' internally to avoid
@@ skipping 169 matching lines @@
      * @private
      */
     toggleMoreInfo_: function() {
       var moreInfo = $('more-info-container');
       this.setMoreInfoVisible_(!moreInfo.classList.contains('visible'));
     },
 
     /**
      * Assigns |method| to the onclick property of |el| if |el| exists.
      * @param {HTMLElement} el The element on which to set the click handler.
-     * @param {function} method The click handler.
+     * @param {Function} method The click handler.
      * @private
      */
     maybeSetOnClick_: function(el, method) {
       if (el)
         el.onclick = method;
     },
 
     /**
      * @param {string} state The state of the update.
      * private
@@ skipping 354 matching lines @@
 
   HelpPage.updateChannelChangePageContainerVisibility = function() {
     HelpPage.getInstance().updateChannelChangePageContainerVisibility_();
   };
 
   // Export
   return {
     HelpPage: HelpPage
   };
 });