chromeos: Improve version label on login screen.

chrome/browser/resources/chromeos/login/oobe.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.
  *
  * This is the stylesheet used by the Out of the box experience (OOBE) flow,
  * sign in and lock screens.
  */
 
 html,
 body {
@@ skipping 1265 matching lines @@
 .error-message-padding {
   margin-bottom: 10px;
 }
 
 html[dir=rtl] .error-message {
   background-position: right top;
 }
 
 #version-labels {
   -webkit-transition: all 500ms linear;
-  color: #999;
+  color: #fff;
   font-size: 11px;
   margin: 10px;
-  opacity: 1.0;
   text-align: end;
-  text-shadow: 0 1px 1px #fff;
+  text-shadow:
+      0 0 4px rgba(0,0,0,.6),
+      0 1px 2px rgba(0,0,0,.8),
+      0 -1px 2px rgba(0,0,0,1);
 }
 
 #offline-network-control {
   margin-left: 60px;
 }
 
 #notification-area {
   color: #666;
   position: absolute;
   text-align: center;
@@ skipping 20 matching lines @@
   width: 100%;
 }
 
 .background-initial {
   opacity: 0;
 }
 
 .background-final {
   opacity: 1;
 }