[ChromeOS] Use oauth's segmented spinner for sign-in loading UI.

chrome/browser/resources/chromeos/login/oobe.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.
  *
  * This is the stylesheet used by the Out of the box experience (OOBE) flow.
  */
 
 html,
 body {
   height: 100%;
@@ skipping 559 matching lines @@
   text-align: left;
   vertical-align: top;
 }
 
 #oauth-enroll-error-retry {
   color: -webkit-link;
   cursor: pointer;
   text-decoration: underline;
 }
 
-@-webkit-keyframes oauth-enroll-spinner {
-  /* There are 13 animation steps, the numbers below space them evenly. Note
-   * that a steps(13) declaration produces off-by-one offsets for some frames,
-   * so for best results we specify positions explicity and use step-end. */
-  0%           { background-position: 286px 0px; }
-  7.6923076%   { background-position: 264px 0px; }
-  15.3846153%  { background-position: 242px 0px; }
-  23.0769230%  { background-position: 220px 0px; }
-  30.7692307%  { background-position: 198px 0px; }
-  38.4615384%  { background-position: 176px 0px; }
-  46.1538461%  { background-position: 154px 0px; }
-  53.8461538%  { background-position: 132px 0px; }
-  61.5384615%  { background-position: 110px 0px; }
-  69.2307692%  { background-position: 88px  0px; }
-  76.9230769%  { background-position: 66px  0px; }
-  84.6153846%  { background-position: 44px  0px; }
-  92.3076923%  { background-position: 22px  0px; }
-  100.0000000% { background-position: 0px   0px; }
-}
-
-.oauth-enroll-spinner {
-  -webkit-animation: oauth-enroll-spinner 1s step-end infinite;
-  background-image: url('chrome://theme/IDR_SPINNER');
-  height: 22px;
-  width: 22px;
-}
-
 #close-button.visible {
   display: inline-block;
 }
 
 #bubble {
   -webkit-transition: 0.25s opacity;
 }
 
 #login-header-bar {
   padding: 8px;
@@ skipping 192 matching lines @@
 }
 
 #version-labels {
   -webkit-transition: all .5s linear;
   bottom: 10px;
   color: #999;
   font-size: 11px;
   left: 10px;
   opacity: 1.0;
   position: absolute;
+  right: 10px;
   text-shadow: 0 1px 1px #fff;
 }
 
 .dropdown-overlay {
   bottom: 0;
   left: 0;
   position: fixed;
   right: 0;
   top: 0;
   z-index: 5;
 }