Hide warning sign for Active Directory pods

ui/login/account_picker/user_pod_row.css

 /* Copyright 2014 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 user pods row of account picker UI.
  */
 
 podrow {
   /* Temporarily disabled because animation interferes with updating screen's
    size. */
@@ skipping 211 matching lines @@
   white-space: nowrap;
 }
 
 .learn-more-container,
 .auth-container,
 .password-entry-container,
 .reauth-hint-container {
   display: none;
 }
 
+.pod[is-active-directory] .reauth-warning {
+  display: none;
+}
+
 .pod[auth-type='offlinePassword'].focused .password-entry-container,
 .pod[auth-type='forceOfflinePassword'].focused .password-entry-container {
   display: flex;
   flex: auto;
 }
 
 .password-container {
   flex: auto;
 }
 
@@ skipping 742 matching lines @@
   -webkit-animation: ellipsis-component2 1.5s infinite;
 }
 
 @-webkit-keyframes ellipsis-component2 {
   0% { opacity: 0; }
   25% { opacity: 0; }
   50% { opacity: 0; }
   75% { opacity: 1; }
   100% { opacity: 0; }
 }