MD WebUI: Pull 'X selected' toolbar overlay from History into shared element

chrome/test/data/webui/md_history/history_supervised_user_test.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.
 
 suite('history-list supervised-user', function() {
   var app;
   var historyList;
   var toolbar;
   var TEST_HISTORY_RESULTS;
 
@@ skipping 20 matching lines @@
     });
   });
 
   test('deletion disabled for supervised user', function() {
     // Make sure that removeVisits is not being called.
     registerMessageCallback('removeVisits', this, function (toBeRemoved) {
       assertNotReached();
     });
 
     historyList.historyData_[0].selected = true;
-    toolbar.onDeleteTap_();
+    toolbar.deleteSelectedItems();
   });
 
   test('remove history menu button disabled', function() {
     var listContainer = app.$['history'];
     listContainer.$.sharedMenu.get();
     assertTrue(listContainer.$$('#menuRemoveButton').hidden);
   });
 });