ui/webui/resources/css/throbber.css

/* 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. */

.throbber {
  background: url('chrome://resources/images/throbber.svg') no-repeat;
  display: inline-block;
  height: 16px;
  width: 16px;
}