Create implementation of the side panel using a dialog.

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 29 matching lines @@
       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'));
+      var drawer = ui.$.drawer;
       assertFalse(drawer.opened);
 
       // Slide the drawer partway open. (These events are copied from Polymer's
       // app-drawer tests.)
       drawer.fire('track', {state: 'start'});
       drawer.fire('track', {state: 'track', dx: 10, ddx: 10});
       drawer.fire('track', {state: 'end', dx: 10, ddx: 0});
 
       // Menu is rendered asynchronously, but the drawer stays closed.
       Polymer.dom.flush();
       assertFalse(drawer.opened);
       assertTrue(!!ui.$$('settings-menu'));
 
       // Slide most of the way open.
       drawer.fire('track', {state: 'start'});
       drawer.fire('track', {state: 'track', dx: 200, ddx: 200});
       drawer.fire('track', {state: 'end', dx: 200, ddx: 0});
 
       // Drawer is shown.
       Polymer.dom.flush();
       assertTrue(drawer.opened);
 
       // Click away from the drawer.
-      MockInteractions.tap(drawer.$.scrim);
+      // MockInteractions don't expose a way to click at a specific location.
+      var midScreen = MockInteractions.middleOfNode(ui);
+      drawer.$.contentContainer.dispatchEvent(new MouseEvent('click', {
+        'bubbles': true,
+        'concelable': true,
+        'clientX': midScreen.x,
+        'clientY': midScreen.y,
+      }));
       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() {
@@ skipping 46 matching lines @@
       var searchField = /** @type {CrToolbarSearchFieldElement} */ (
           toolbar.getSearchField());
       var value = 'GOOG';
       searchField.setValue(value);
       assertEquals(value, settings.getQueryParameters().get('search'));
     });
   });
 
   mocha.run();
 });