Search & replace of -webkit-box-shadow -> box-shadow

remoting/webapp/menu_button.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.
  */
 
 .menu-button {
   position: relative;
 }
 
 .menu-button button + ul {
   visibility: hidden;
   position: absolute;
   top: 22px;
   left: 1px;
 }
 
 .menu-button button.active + ul {
   visibility: visible;
 }
 
 .menu-button button.active {
   background-color: #EEE;
   background-image: -webkit-gradient(linear, left top, left bottom,
                                      from(#EEE), to(#E0E0E0));
-  -webkit-box-shadow: inset 0px 1px 2px rgba(0, 0, 0, 0.1);
+  box-shadow: inset 0px 1px 2px rgba(0, 0, 0, 0.1);
   border: 1px solid #CCC;
   color: #333;
 }
 
 .menu-button button .kd-disclosureindicator {
   vertical-align: middle;
   margin-left: 7px;
   opacity: .8;
 }
 
 .menu-button ul {
   padding: 0;
   margin: 0;
   list-style-type: none;
   background: white;
   outline: 1px solid rgba(0, 0, 0, 0.2);
   padding: 0 0 6px;
-  -webkit-box-shadow: 0px 2px 4px rgba(0, 0, 0, 0.2);
+  box-shadow: 0px 2px 4px rgba(0, 0, 0, 0.2);
   z-index: 1;
 }
 
 .menu-button li {
   padding: 6px 44px 6px 30px;
   white-space: nowrap;
 }
 
 .menu-button li:hover {
   background-color: #EEE;
 }
 
 .menu-button li.menu-separator {
   border-top: 1px solid #EBEBEB;
   margin-top: 9px;
   margin-bottom: 10px;
   padding: 0;
 }
 
 .menu-button li.selected {
   background-image: url('tick.webp');
   background-position: left center;
   background-repeat: no-repeat;
 }