ui/file_manager/audio_player/elements/audio_player.css

/* Copyright 2014 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. */

control-panel {
  border-top: 1px solid rgba(0, 0, 0, 0.1);
  bottom: 0;
  left: 0;
  margin-bottom: 8px;
  position: fixed;
  right: 0;
}