Convert Event#keyIdentifier (deprecated) to Event#key

ui/file_manager/file_manager/foreground/js/ui/actions_submenu_unittest.html

Index: ui/file_manager/file_manager/foreground/js/ui/actions_submenu_unittest.html
diff --git a/ui/file_manager/file_manager/foreground/js/ui/actions_submenu_unittest.html b/ui/file_manager/file_manager/foreground/js/ui/actions_submenu_unittest.html
index 025b7459a4cfea97f78d8cb1130773df0ebae2e5..0f3313abf1cfe6633348fcb17eb0017fa1f10982 100644
--- a/ui/file_manager/file_manager/foreground/js/ui/actions_submenu_unittest.html
+++ b/ui/file_manager/file_manager/foreground/js/ui/actions_submenu_unittest.html
@@ -4,6 +4,14 @@
   -- found in the LICENSE file.
   -->
 
+<script>
+function queryRequiredElement(selectors, opt_context) {
+  var element = (opt_context || document).querySelector(selectors);
+  return assertInstanceof(element, HTMLElement,
+                          'Missing required element: ' + selectors);
+}
+</script>
+
 <command id="share" label="Share"></command>
 <command id="toggle-pinned" label="Toggle pinned"></command>
 <command id="create-folder-shortcut" label="Create folder shortcut"></command>
@@ -20,7 +28,6 @@
 <script src="../../../../../../ui/webui/resources/js/cr/ui/command.js"></script>
 <script src="../../../../../../ui/webui/resources/js/cr/ui/menu_item.js"></script>
 <script src="../../../../../../ui/webui/resources/js/cr/ui/menu.js"></script>
-<script src="../../../../../../ui/webui/resources/js/util.js"></script>
 <script src="../../../common/js/util.js"></script>
 <script src="../actions_model.js"></script>
 <script src="../mock_actions_model.js"></script>