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

chrome/browser/resources/ntp4/new_tab.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 {
   /* It's necessary to put this here instead of in body in order to get the
      background-size of 100% to work properly */
   height: 100%;
   overflow: hidden;
 }
@@ skipping 281 matching lines @@
 }
 
 #login-status-dismiss {
   min-width: 6em;
 }
 
 /* Trash. *********************************************************************/
 
 #trash {
   -webkit-padding-start: 10px;
-  -webkit-transition: top 200ms, opacity 0;
-  -webkit-transition-delay: 0, 200ms;
+  -webkit-transition: top 200ms, opacity 0ms;
+  -webkit-transition-delay: 0ms, 200ms;
   color: #222;
   height: 100%;
   opacity: 0;
   position: absolute;
   right: 0;
   top: 50px;
   width: auto;
 }
 
 html[dir='rtl'] #trash {
   left: 0;
   right: auto;
 }
 
 #footer.showing-trash-mode #trash {
-  -webkit-transition-delay: 0, 0;
-  -webkit-transition-duration: 0, 200ms;
+  -webkit-transition-delay: 0ms, 0ms;
+  -webkit-transition-duration: 0ms, 200ms;
   opacity: 0.75;
   top: 0;
 }
 
 #footer.showing-trash-mode #trash.drag-target {
   opacity: 1;
 }
 
 #trash > .trash-text {
   -webkit-padding-end: 7px;
@@ skipping 95 matching lines @@
 }
 
 /* Show the separator only if one of the menus is visible. */
 .footer-menu-button:not([hidden]) ~ #chrome-web-store-link:not([hidden])
                                   ~ #vertical-separator {
   display: inline-block;
 }
 
 /* In trash mode, hide the menus and web store link. */
 #footer.showing-trash-mode .menu-container {
-  -webkit-transition-delay: 0;
+  -webkit-transition-delay: 0ms;
   opacity: 0;
   visibility: hidden;
 }
 
 #footer .menu-container {
   -webkit-align-items: center;
   -webkit-flex-direction: row;
   -webkit-justify-content: flex-end;
   /* Put menus in a box so the order can easily be swapped. */
   display: -webkit-flex;
@@ skipping 15 matching lines @@
   padding: 0;
 }
 
 .other-sessions-promo-message:only-child {
   display: block;
 }
 
 .other-sessions-promo-message p {
   margin: 0;
 }