Clean-up: Change chrome/browser's CSS time units from s to ms.

chrome/browser/resources/shared/css/dialogs.css

 /*
  * Copyright (c) 2011 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.
  */
 
 .cr-dialog-container {
   position: absolute;
   -webkit-user-select: none;
   top: 0;
   left: 0;
   height: 100%;
   width: 100%;
 
   background: -webkit-radial-gradient(rgba(127, 127, 127, 0.5),
                                       rgba(127, 127, 127, 0.5) 35%,
                                       rgba(0, 0, 0, 0.7));
   opacity: 0;
-  -webkit-transition: opacity 0.25s linear;
+  -webkit-transition: opacity 250ms linear;
   overflow: hidden;
 
   z-index: 9999;
 }
 
 .cr-dialog-frame {
   position: absolute;
   display: -webkit-box;
   -webkit-box-orient: vertical;
   -webkit-box-shadow: 5px 5px 5px rgba(100, 100, 100, 0.5);
 
-  -webkit-transition-duration:  0.25s;
+  -webkit-transition-duration: 250ms;
   -webkit-transition-property: none;
 
   min-width: 25%;
   max-width: 75%;
   border: 1px #aaa solid;
   border-radius: 2px;
   background-color: white;
   padding: 15px;
 }
 
 .cr-dialog-text {
   padding-bottom: 10px;
 }
 
 .cr-dialog-frame input {
   -webkit-box-sizing: border-box;
   width: 100%;
 }
 
 .cr-dialog-buttons {
   display: -webkit-box;
   -webkit-box-orient: horizontal;
   padding-top: 10px;
   -webkit-box-pack: end;
 }