Add remove non-device-owner user removal confirmation

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 652 matching lines @@
 
 .action-box-remove-user-warning-table-numbers {
   color: #757575;
   text-align: end;
 }
 
 /* Hide dialog elements not in a correct category. Only combinations currently
    in use are included here. */
 .pod.legacy-supervised .non-sync,
 .pod.legacy-supervised .action-box-remove-user-warning-text,
+.pod.legacy-supervised .action-box-remove-non-owner-user-warning-text,
 .pod:not(.legacy-supervised)
     .action-box-remove-legacy-supervised-user-warning-text,
 .pod.synced .non-sync,
 .pod.has-no-stats .has-stats {
   display: none;
 }
 
 .user-type-bubble {
   background-color: white;
   border: 1px solid lightgray;
@@ skipping 224 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; }
 }