Guest mode page visibility patch set 11, minus dom.flush(), w/ overscroll fix

chrome/browser/resources/settings/downloads_page/downloads_page.js

 // Copyright 2015 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.
 
 /**
  * @fileoverview
  * 'settings-downloads-page' is the settings page containing downloads
  * settings.
  *
  * Example:
  *
  *    <iron-animated-pages>
  *      <settings-downloads-page prefs="{{prefs}}">
  *      </settings-downloads-page>
  *      ... other pages ...
  *    </iron-animated-pages>
  */
 Polymer({
   is: 'settings-downloads-page',
 
   properties: {
     /**
      * Preferences state.
      */
     prefs: {
       type: Object,
       notify: true,
     },
+
+    /**
+     * Dictionary defining page visibility.
+     * @type {!DownloadsPageVisibility}
+     */
+    pageVisibility: Object,
   },
 
   /** @private */
   selectDownloadLocation_: function() {
     chrome.send('selectDownloadLocation');
   },
 });