webui: make 0 into 0ms when it's a <time>.

chrome/browser/resources/extensions/extensions.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. */
 
 html.loading * {
-  transition-duration: 0 !important;
+  transition-duration: 0ms !important;
 }
 
 html:not(.focus-outline-visible)
 :enabled:focus:-webkit-any(input[type='checkbox'], input[type='radio']) {
   /* Cancel border-color for :focus specified in widgets.css. */
   border-color: rgba(0, 0, 0, 0.25);
 }
 
 .no-scroll {
   overflow-y: hidden;
@@ skipping 389 matching lines @@
 /* Sideload Wipeout */
 
 .sideload-wipeout-learn-more {
   text-decoration: none;
 }
 
 .sideload-wipeout-banner .page-banner-text {
   -webkit-padding-start: 8px;
   background-image: none;
 }