Replace own callback handling with Promises.

ui/webui/resources/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.
 
 <include src="assert.js">
 
 /**
  * The global object.
  * @type {!Object}
  * @const
@@ skipping 389 matching lines @@
  * |maxLength|.
  * @param {string} original The original string.
  * @param {number} maxLength The maximum length allowed for the string.
  * @return {string} The original string if its length does not exceed
  *     |maxLength|. Otherwise the first |maxLength| - 3 characters with '...'
  *     appended.
  */
 function elide(original, maxLength) {
   if (original.length <= maxLength)
     return original;
-  return original.substring(0, maxLength - 3) + '...';
+  return original.substring(0, maxLength - 3) + '\u2026';

[Bernhard Bauer, 2014/01/10 13:52:08]

Now that you use a single character for the ellipsis, you can make the string
longer.

It also might be nice to add a test that verifies that the length of the elided
string increases monotonically with the length of the original string (which
doesn't happen right now).

[Adrian Kuegel, 2014/01/10 16:52:01]

Done.
I added a few more cases to the test which checks elision for the
managed_user_create_confirm dialog.

 }