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

ui/webui/resources/js/cr/ui/page_manager/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('cr.ui.pageManager', function() {
   var PageManager = cr.ui.pageManager.PageManager;
 
   /**
    * Base class for pages that can be shown and hidden by PageManager. Each Page
    * is like a node in a forest, corresponding to a particular div. At any
    * point, one root Page is visible, and any visible Page can show a child Page
    * as an overlay. The host of the root Page(s) should provide a container div
    * for each nested level to enforce the stack order of overlays.
    * @constructor
    * @param {string} name Page name.
    * @param {string} title Page title, used for history.
    * @param {string} pageDivName ID of the div corresponding to the page.
-   * @extends {EventTarget}

[Dan Beam, 2014/08/13 22:20:08]

this needs to match with the __proto__ line

[Vitaly Pavlenko, 2014/08/14 00:01:02]

Done.

    */
   function Page(name, title, pageDivName) {
     this.name = name;
     this.title = title;
     this.pageDivName = pageDivName;
     this.pageDiv = $(this.pageDivName);
     // |pageDiv.page| is set to the page object (this) when the page is visible
     // to track which page is being shown when multiple pages can share the same
     // underlying div.
     this.pageDiv.page = null;
     this.tab = null;
     this.lastFocusedElement = null;
   }
 
   Page.prototype = {
     __proto__: cr.EventTarget.prototype,
 
     /**
      * The parent page of this page, or null for root pages.
-     * @type {Page}
+     * @type {cr.ui.pageManager.Page}
      */
     parentPage: null,
 
     /**
      * The section on the parent page that is associated with this page.
      * Can be null.
      * @type {Element}
      */
     associatedSection: null,
 
@@ skipping 187 matching lines @@
         // -webkit-transition is 200ms. Let's wait for 400ms.
         ensureTransitionEndEvent(container, 400);
       }
 
       if (visible) {
         container.hidden = false;
         pageDiv.hidden = false;
         pageDiv.page = this;
         // NOTE: This is a hacky way to force the container to layout which
         // will allow us to trigger the webkit transition.
+        /** @suppress {uselessCode} */
         container.scrollTop;
 
         this.pageDiv.removeAttribute('aria-hidden');
         if (this.parentPage) {
           this.parentPage.pageDiv.parentElement.setAttribute('aria-hidden',
                                                              true);
         }
         container.classList.remove('transparent');
         PageManager.onPageVisibilityChanged(this);
       } else {
@@ skipping 22 matching lines @@
         PageManager.onPageVisibilityChanged(this);
       }
     },
   };
 
   // Export
   return {
     Page: Page
   };
 });