MD Extensions: Show messages for no extensions, and for no search results

chrome/test/data/webui/extensions/extension_manager_test.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 Suite of tests for extension-sidebar. */
 cr.define('extension_manager_tests', function() {
   /** @enum {string} */
   var TestNames = {
     ItemOrder: 'item order',
     ItemListVisibility: 'item list visibility',
@@ skipping 60 matching lines @@
         expectEquals(6, manager.extensions.length);
         expectEquals(betaUnpacked.id, manager.extensions[0].id);
         expectEquals(gammaUnpacked.id, manager.extensions[1].id);
         expectEquals(aaFromStore.id, manager.extensions[2].id);
         expectEquals(AaFromStore.id, manager.extensions[3].id);
         expectEquals(aAFromStore.id, manager.extensions[4].id);
         expectEquals(alphaFromStore.id, manager.extensions[5].id);
       });
 
       test(assert(TestNames.ItemListVisibility), function() {
-        var testVisible = extension_test_util.testVisible.bind(null, manager);
         var extension = getDataByName(manager.extensions, 'My extension 1');
 
         var listHasItemWithName = function(name) {
           return !!manager.$['items-list'].items.find(function(el) {
             return el.name == name;
           });
         };
 
         expectEquals(manager.extensions, manager.$['items-list'].items);
-        testVisible('#items-list', true);
         expectTrue(listHasItemWithName('My extension 1'));
 
         manager.removeItem(extension);
         Polymer.dom.flush();
-        testVisible('#items-list', false);
         expectFalse(listHasItemWithName('My extension 1'));
 
         manager.addItem(extension);
         Polymer.dom.flush();
-        testVisible('#items-list', true);
         expectTrue(listHasItemWithName('My extension 1'));
       });
 
       test(assert(TestNames.ShowItems), function() {
         var sectionHasItemWithName = function(section, name) {
           return !!manager[section].find(function(el) {
             return el.name == name;
           });
         };
 
@@ skipping 90 matching lines @@
 
       });
     });
   }
 
   return {
     registerTests: registerTests,
     TestNames: TestNames,
   };
 });