chrome/browser/resources/extensions_infobar.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. */

/**
 * The following style rules affect Extension Infobars.
 */

body {
  background: -webkit-linear-gradient(#E9E9E9, #DADADA);
  font-family: Segoe UI, Tahoma;
  font-size: 11px;
  height: 36px; /* Infobars are limited to 36-72px */
  margin: 0;
  overflow: hidden;
}