chrome/browser/resources/task_scheduler_internals/index.css

/* Copyright 2016 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. */

table {
  border: 1px solid black;
  border-collapse: collapse;
}

td,
th {
  border: 1px solid black;
  padding: 5px;
  text-align: center;
}