Make |context| passed to queryRequiredElement optional

ui/file_manager/file_manager/common/js/util.js

 // Copyright (c) 2012 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.
 
 /**
  * Namespace for utility functions.
  */
 var util = {};
 
 /**
@@ skipping 257 matching lines @@
 /**
  * Obtains the element that should exist, decorates it with given type, and
  * returns it.
  * @param {string} query Query for the element.
  * @param {function(new: T, ...)} type Type used to decorate.
  * @private
  * @template T
  * @return {!T} Decorated element.
  */
 util.queryDecoratedElement = function(query, type) {
-  var element = queryRequiredElement(document, query);
+  var element = queryRequiredElement(query);
   cr.ui.decorate(element, type);
   return element;
 };
 
 /**
  * Updates the app state.
  *
  * @param {?string} currentDirectoryURL Currently opened directory as an URL.
  *     If null the value is left unchanged.
  * @param {?string} selectionURL Currently selected entry as an URL. If null the
@@ skipping 780 matching lines @@
  * @return {!Promise} A promise which can be rejected by timeout.
  */
 util.timeoutPromise = function(promise, ms, opt_message) {
   return Promise.race([
     promise,
     util.delay(ms).then(function() {
       throw new Error(opt_message || 'Operation timed out.');
     })
   ]);
 };