MD Settings: fix double-tap to hide advanced bug

chrome/test/data/webui/settings/settings_ui_browsertest.js

 // Copyright 2016 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 Suite of tests for the Settings layout. */
 
 GEN_INCLUDE(['settings_page_browsertest.js']);
 
 /**
  * @constructor
@@ skipping 14 matching lines @@
 GEN('#define MAYBE_All All');
 GEN('#endif');
 
 TEST_F('SettingsUIBrowserTest', 'MAYBE_All', function() {
   suite('settings-ui', function() {
     var toolbar;
     var ui;
 
     suiteSetup(function() {
       ui = assert(document.querySelector('settings-ui'));
+      ui.$.drawerTemplate.restamp = true;
+    });
+
+    setup(function() {
+      ui.$.drawerTemplate.if = false;
+      Polymer.dom.flush();
     });
 
     test('basic', function() {
       toolbar = assert(ui.$$('cr-toolbar'));
       assertTrue(toolbar.showMenu);
     });
 
     test('app drawer', function(done) {
       assertEquals(null, ui.$$('settings-menu'));
       var drawer = assert(ui.$$('app-drawer'));
@@ skipping 22 matching lines @@
       // Click away from the drawer.
       MockInteractions.tap(drawer.$.scrim);
       Polymer.Base.async(function() {
         // Drawer is closed, but menu is still stamped so its contents remain
         // visible as the drawer slides out.
         assertFalse(drawer.opened);
         assertTrue(!!ui.$$('settings-menu'));
         done();
       });
     });
+
+    test('advanced UIs stay in sync', function() {
+      var main = ui.$$('settings-main');
+      assertTrue(!!main);
+
+      assertFalse(!!ui.$$('settings-menu'));
+      assertFalse(ui.advancedOpened_);
+      assertFalse(main.advancedToggleExpanded);
+
+      main.advancedToggleExpanded = true;
+      Polymer.dom.flush();
+
+      assertFalse(!!ui.$$('settings-menu'));
+      assertTrue(ui.advancedOpened_);
+      assertTrue(main.advancedToggleExpanded);
+
+      ui.$.drawerTemplate.if = true;
+      Polymer.dom.flush();
+
+      var menu = ui.$$('settings-menu');
+      assertTrue(!!menu);
+      assertTrue(menu.advancedOpened);
+
+      MockInteractions.tap(menu.$$('#advancedPage .menu-trigger'));
+      Polymer.dom.flush();
+
+      // Check that all values are updated in unison.
+      assertFalse(menu.advancedOpened);
+      assertFalse(ui.advancedOpened_);
+      assertFalse(main.advancedToggleExpanded);
+    });
   });
 
   mocha.run();
 });