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

chrome/browser/resources/set_as_default_browser.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. */
 
 /* The main (outer) container. */
 #metro-setup-outer-container {
   -webkit-box-align: center;
   -webkit-box-orient: vertical;
   -webkit-box-pack: start;
   -webkit-transition: 200ms opacity;
@@ skipping 77 matching lines @@
   border-radius: 2px;
   display: inline-block;
   font-size: 13px;
   height: 32px;
   line-height: 27px;
   margin-top: 0;
   min-width: 80px;
 }
 
 #metro-action-box button:hover {
-  -webkit-transition: all 0;
+  -webkit-transition: all 0ms;
   box-shadow: 0 1px 1px rgba(0, 0, 0, 0.1);
 }
 
 #metro-action-box button:focus {
   box-shadow: inset 0 0 0 1px white;
   outline: none;
   z-index: 4 !important;
 }
 
 #metro-action-box button:active,
@@ skipping 41 matching lines @@
   margin: 1px;
   text-align: center;
 }
 
 #chrome-logo-box {
   bottom: 30px;
   position: absolute;
   text-align: center;
   width: 100%;
 }