MD Settings: move appeal into flow to unhide Advanced toggle

chrome/browser/resources/settings/settings_ui/settings_ui.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-ui' implements the UI for the Settings page.
  *
  * Example:
  *
  *    <settings-ui prefs="{{prefs}}"></settings-ui>
  */
 Polymer({
   is: 'settings-ui',
 
   properties: {
     /**
      * Preferences state.
      * @type {?CrSettingsPrefsElement}
      */
     prefs: Object,
 
     /** @type {?settings.DirectionDelegate} */
     directionDelegate: {
       observer: 'directionDelegateChanged_',
       type: Object,
     },
+
+    appealClosed_: {
+      type: Boolean,
+      value: function() {
+        return !!(sessionStorage.appealClosed_ || localStorage.appealClosed_);
+      },
+    },
   },
 
   listeners: {
     'sideNav.iron-activate': 'onIronActivate_',
   },
 
+  /** @private */
+  onCloseAppealTap_: function() {
+    sessionStorage.appealClosed_ = this.appealClosed_ = true;
+  },
+
   /**
    * @param {Event} event
    * @private
    */
   onIronActivate_: function(event) {
     if (event.detail.item.id != 'advancedPage')
       this.$$('app-drawer').close();
   },
 
   /** @private */
   onMenuButtonTap_: function() {
     this.$$('app-drawer').toggle();
   },
 
   /** @private */
   directionDelegateChanged_: function() {
     this.$$('app-drawer').align = this.directionDelegate.isRtl() ?
         'right' : 'left';
   },
 });