[MD Extensions]: Fix sidebar icons

chrome/test/data/webui/extensions/extension_detail_view_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.
 
 /** @fileoverview Suite of tests for extensions-detail-view. */
 cr.define('extension_detail_view_tests', function() {
   /** @enum {string} */
   var TestNames = {
     Layout: 'layout',
     ClickableElements: 'clickable elements',
@@ skipping 31 matching lines @@
         });
         mockDelegate = new extension_test_util.MockItemDelegate();
         item = new extensions.DetailView();
         item.set('data', extensionData);
         item.set('delegate', mockDelegate);
         document.body.appendChild(item);
       });
 
       test(assert(TestNames.Layout), function() {
         Polymer.dom.flush();
+
+        extension_test_util.testIronIcons(item);
+
         var testIsVisible = extension_test_util.isVisible.bind(null, item);
         expectTrue(testIsVisible('#close-button'));
         expectTrue(testIsVisible('#open-in-webstore'));
         expectTrue(testIsVisible('#options'));
 
         // Check the checkboxes visibility and state. They should be visible
         // only if the associated option is enabled, and checked if the
         // associated option is active.
         var accessOptions = [
           {key: 'incognitoAccess', id: '#allow-incognito'},
@@ skipping 36 matching lines @@
             [extensionData.id, true]);
       });
     });
   }
 
   return {
     registerTests: registerTests,
     TestNames: TestNames,
   };
 });