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

chrome/browser/resources/ntp4/recently_closed.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.
  */
 
 #recently-closed-menu-button {
   background: none;
   border: 0;
   color: #7F7F7F;
   cursor: pointer;
   display: block;
   font-size: 9pt;
   font-weight: bold;
   /* The padding increases the clickable area. */
   padding-bottom: 8px;
   padding-top: 8px;
   -webkit-appearance: none;
-  -webkit-transition: opacity 0.2s;
-  -webkit-transition-delay: 0.1s;
+  -webkit-transition: opacity 200ms;
+  -webkit-transition-delay: 100ms;
 }
 
 /* Reserve space for the menu button even when it's hidden. */
 #recently-closed-menu-button.invisible,
 #footer.showing-trash-mode #recently-closed-menu-button {
   visibility: hidden;
 }
 
 #footer.showing-trash-mode #recently-closed-menu-button {
   opacity: 0;
@@ skipping 51 matching lines @@
   color: hsl(213, 90%, 24%) !important;
 }
 
 .disclosure-triangle {
   background-color: #7F7F7F;
   display: inline-block;
   height: 9px;
   width: 9px;
   -webkit-mask-image: url('images/disclosure_triangle_mask.png');
 }