Refresh button for FrE and recovery modes added to enrollment screen.

chrome/browser/resources/chromeos/login/oobe_screen_oauth_enrollment_webview.css

 /* Copyright 2015 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.
  */
 
 #oauth-enrollment {
   height: 528px;
   padding: 0;
   width: 448px;
 }
@@ skipping 61 matching lines @@
 .oauth-enroll-link {
   color: rgb(17, 85, 204);
   cursor: pointer;
   text-decoration: none;
 }
 
 .oauth-enroll-button {
   display: none;
 }
 
+#oauth-enroll-back-button,
+#oauth-enrollment.saml #oauth-enroll-back-button {
+  display: none;
+}
+
+.oauth-enroll-state-signin #oauth-enroll-back-button {
+  display: inline;
+}
+
 .oauth-enroll-state-signin.mode-manual #oauth-enroll-cancel-button,
-.oauth-enroll-state-signin #oauth-enroll-back-button,
+.oauth-enroll-state-signin.mode-forced #oauth-enroll-refresh-button,
+.oauth-enroll-state-signin.mode-recovery #oauth-enroll-refresh-button,
 .oauth-enroll-state-working.mode-manual #oauth-enroll-cancel-button,
-.oauth-enroll-state-working #oauth-enroll-back-button,
+.oauth-enroll-state-working.mode-forced #oauth-enroll-refresh-button,
+.oauth-enroll-stain-working.mode-recovery #oauth-enroll-refresh-button,
 .oauth-enroll-state-error.mode-manual #oauth-enroll-cancel-button,
 .oauth-enroll-state-error.mode-manual #oauth-enroll-done-button,
-.oauth-enroll-state-error #oauth-enroll-back-button,
 .oauth-enroll-state-success #oauth-enroll-done-button {
   display: inline;
 }
 
 #oobe.oauth-enrollment #header-oauth-enrollment {
   display: block;
 }
 
 #oauth-saml-notice-container {
   -webkit-margin-start: 19px;
@@ skipping 17 matching lines @@
   display: none;
 }
 
 #oauth-saml-notice-message {
   color: rgb(106, 106, 106);
   font-size: 13px;
   margin: 0 auto;
 }
 
 #oauth-enroll-cancel-button,
-#oauth-enroll-back-button {
+#oauth-enroll-back-button,
+#oauth-enroll-refresh-button {
   position: absolute;
   top: 10px;
+  z-index: 1;
 }
 
-#oauth-enroll-cancel-button {
+#oauth-enroll-cancel-button,
+#oauth-enroll-refresh-button {
   color: rgba(0, 0, 0, .54);
   right: 10px;
 }
 
-html[dir=rtl] #oauth-enroll-cancel-button {
+html[dir=rtl] #oauth-enroll-cancel-button,
+html[dir=rtl] #oauth-enroll-refresh-button {
   left: 10px;
   right: auto;
 }
 
-#oauth-enrollment.saml #oauth-enroll-cancel-button {
+#oauth-enrollment.saml #oauth-enroll-cancel-button,
+#oauth-enrollment.saml #oauth-enroll-refresh-button {
   color: rgba(0, 0, 0, .54);
 }
 
 .oauth-enroll-state-signin #oauth-enroll-cancel-button,
-.oauth-enroll-state-working #oauth-enroll-cancel-button {
+.oauth-enroll-state-working #oauth-enroll-cancel-button,
+.oauth-enroll-state-signin #oauth-enroll-refresh-button,
+.oauth-enroll-state-working #oauth-enroll-refresh-button {
   color: white;
 }
 
 #oauth-enroll-back-button {
   color: white;
   left: 10px;
 }
 
 html[dir=rtl] #oauth-enroll-back-button {
   -webkit-transform: scaleX(-1);
   left: auto;
   right: 10px;
 }
 
 #oauth-enrollment.saml #oauth-enroll-back-button {
   display: none;
 }
 
 #oauth-enroll-attribute-prompt-message {
   color: black;
 }
+