Gaia loading screen changed to align with new Sync screen UI.

chrome/browser/resources/chromeos/login/screen_gaia_signin.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.
  */
 
 #gaia-signin {
   height: 609px; /* Should be the same as #user-image.loading min-heigth. */
   padding: 70px 17px 69px;    /* Screen has no controls. */
   width: 722px; /* Should be the same as #user-image.loading width. */
 }
 
 #gaia-signin:not(.full-width).no-right-panel {
   width: 522px;
 }
 
 .new-gaia-flow #gaia-signin {
   padding: 0 0 0;
   width: 522px;
 }
 
+.new-gaia-flow .throbber {
+  display: none;
+}
+
+throbber-notice {
+  display: none;
+}
+
+.new-gaia-flow throbber-notice {
+  display: block;
+}
+
 #gaia-signin.full-width {
   padding: 75px 0 0;
 }
 
 #signin-right {
   -webkit-margin-start: 30px;
   margin-top: 80px;
   top: 60px;
   width: 200px;
 }
@@ skipping 31 matching lines @@
 
 html[dir=rtl] #close-button-item {
   left: 15px;
   right: auto;
 }
 
 .loading #close-button-item {
   background-image: url(chrome://theme/IDR_LOGIN_CLOSE_BUTTTON_ON_WHITE);
 }
 
+.loading.auth-completed #close-button-item {
+  display: none;
+}
+
 #close-button-item:disabled {
   background-image: url(chrome://theme/IDR_LOGIN_CLOSE_BUTTTON_MASKED);
 }
 
 #back-button-item {
   background: transparent none;
   background-image: url(chrome://theme/IDR_LOGIN_BACK_BUTTTON);
   background-position: center;
   background-repeat: no-repeat;
   height: 18px;
@@ skipping 137 matching lines @@
   left: 0;
   position: absolute;
   right: 0;
   text-align: center;
   top: 50px;
 }
 
 #saml-notice-message {
   margin: 0 auto;
 }