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

chrome/browser/resources/ntp4/bookmarks_page.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.
  */
 
 /* Bookmark Tiles ************************************************************/
 
 .bookmark {
   display: -webkit-box;
   position: absolute;
   -webkit-box-orient: vertical;
 }
 
 .bookmark-fills-parent {
   bottom: 0;
   display: -webkit-box;
   left: 0;
   position: absolute;
   right: 0;
   top: 0;
 }
 
 .bookmark.removable .close-button {
   display: block;
   opacity: 0;
   position: absolute;
   right: 0;
   top: 0;
   z-index: 5;
-  -webkit-transition: opacity 0.15s;
+  -webkit-transition: opacity 150ms;
 }
 
 .bookmark .close-button {
   display: none;
 }
 
 html[dir=rtl] .bookmark .close-button {
   left: 0;
   right: auto;
 }
 
 .bookmark:hover .close-button {
   opacity: 1;
-  -webkit-transition-delay: 0.5s;
+  -webkit-transition-delay: 500ms;
 }
 
 .bookmark .favicon {
   background: no-repeat 5% 90%;
 }
 
 .bookmark .color-stripe {
   border-bottom-left-radius: 3px 3px;
   border-bottom-right-radius: 3px 3px;
   /* Matches height of title. */
@@ skipping 20 matching lines @@
 
 .bookmark .button {
   cursor: pointer;
   background-color: rgba(0, 0, 0, 0.15);
   border: 1px solid transparent;
   border-radius: 5px;
   bottom: 70px;
   position: relative;
   z-index: 5;
   -webkit-box-flex: 1;
-  -webkit-transition: background-color .15s;  
+  -webkit-transition: background-color 150ms;
 }
 
 .bookmark:hover .button {
   background-color: rgba(0, 0, 0, 0.3);
 }
 
 .bookmark .button-frame {
   background-color: #fff;
   border-radius: 5px;
 }
@@ skipping 73 matching lines @@
   margin: 0px -70px;
   text-align: end;
 }
 
 .bookmarks-import-data-link-wrapper {
   left: 0;
   position: absolute;
   right: 0;
   top: 33%;
 }