ChromeOS: Show the new POD RE-AUTH ICON when users needs to re-auth

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 149 matching lines @@
   overflow: hidden;
   padding: 0 6px;
   text-align: center;
   text-overflow: ellipsis;
   white-space: nowrap;
 }
 
 .learn-more-container,
 .auth-container,
 .password-entry-container,
-.signin-button-container {
+.reauth-hint-container {
   display: none;
 }
 
 .pod[auth-type='offlinePassword'].focused .password-entry-container,
 .pod[auth-type='forceOfflinePassword'].focused .password-entry-container {
   display: flex;
   flex: auto;
 }
 
 .password-container {
@@ skipping 164 matching lines @@
 
 .custom-icon-container {
   display: flex;
   flex: none;
   flex-direction: column;
   height: 40px;
   justify-content: center;
   width: 40px;
 }
 
-.pod[auth-type='onlineSignIn'] .signin-button-container,
 .launch-app-button-container {
   display: block;
   flex: auto;
   text-align: center;
 }
 
-.signin-button,
 .launch-app-button {
   display: inline;
   margin-top: 6px !important;
   max-width: 100%;
   overflow: hidden;
   text-overflow: ellipsis;
 }
 
+.pod[auth-type='onlineSignIn'] .reauth-hint-container {
+  display: flex;
+  margin-top: 8px;
+  width: 100%;
+  justify-content: center;
+}
+
+.reauth-hint-container .reauth-warning {
+  color: #f4b400;
+  display: inline-flex;
+}
+
+.reauth-hint-container .reauth-name-hint {
+  align-self: center;
+  color: #565656;
+  font-size: 16px;
+  outline: none;
+  overflow: hidden;
+  padding: 0 6px;
+  text-align: center;
+  text-overflow: ellipsis;
+  white-space: nowrap;
+}
+
 .action-box-area,
 .user-type-icon-area {
   background-color: white;
   border-radius: 2px;
   position: absolute;
   top: 0;
 }
 
 .action-box-area {
   opacity: 0;
@@ skipping 379 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; }
 }