chromium/third_party/blink/renderer/modules/media_controls/resources/mediaControls_Android.css

/* Copyright 2019 The Chromium Authors
   Use of this source code is governed by a BSD-style license that can be
   found in the LICENSE file.*/

@namespace "http://www.w3.org/1999/xhtml";

/* Rules in this and other mediaControls*.css files override rules from html.css
   and other UA sheets regardless of specificity. See comment in
   StyleResolver::MatchUARules(). */

/* On Android, we always want the slider thumb to appear. */
video::-webkit-media-controls input[pseudo="-webkit-media-controls-timeline" i]::-webkit-slider-thumb,
audio::-webkit-media-controls input[pseudo="-webkit-media-controls-timeline" i]::-webkit-slider-thumb {
  opacity: 1;
}