Add fingerprint UI in user pod

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 397 matching lines @@
 }
 
 .interactive-custom-icon {
   cursor: pointer;
 }
 
 .pod[auth-type='onlineSignIn'] .custom-icon-container {
   display: none;
 }
 
+.fingerprint-icon-container,
 .custom-icon-container {
   display: flex;
   flex: none;
   flex-direction: column;
   height: 43px;
   width: 27px;
 }
 
 .launch-app-button-container {
   display: block;
@@ skipping 119 matching lines @@
 
 .user-type-icon-area.policy .user-type-icon-image {
   background-image: url(../../webui/resources/images/business.svg);
   background-size: 18px;
 }
 
 .user-type-icon-area.app .user-type-icon-image {
   background-image: url(chrome://theme/IDR_KIOSK_APP_USER_POD_ICON);
 }
 
+.fingerprint-icon-container.hidden {
+  display: none;
+}
+
+.fingerprint-icon-container.default .fingerprint-icon-image {
+  background-image: url(../../webui/resources/images/fingerprint_default.svg);
+}
+
+.fingerprint-icon-container.default:hover .fingerprint-icon-image {
+  background-image: url(../../webui/resources/images/fingerprint_signin.svg);
+}
+
+.fingerprint-icon-container.signin .fingerprint-icon-image {
+  background-image: url(../../webui/resources/images/fingerprint_signin.svg);
+}
+
+.fingerprint-icon-container.failed .fingerprint-icon-image {
+  background-image: url(../../webui/resources/images/fingerprint_failed.svg);
+}
+
+.pod input[type='password'].hidden::-webkit-input-placeholder {
+  color: grey;
+}
+
+.pod input[type='password'].default::-webkit-input-placeholder {
+  color: grey;
+}
+
+.pod input[type='password'].signin::-webkit-input-placeholder {
+  color: var(--google-blue-500);
+}
+
+.pod input[type='password'].failed::-webkit-input-placeholder {
+  color: var(--google-red-500);
+}
+
 .action-box-menu {
   display: none;
   z-index: 6;
 }
 
 .action-box-area.active ~ .action-box-menu {
   background-color: white;
   border: 1px solid lightgray;
   border-radius: 2px;
   display: flex;
@@ skipping 420 matching lines @@
   animation: ellipsis-component2 1.5s infinite;
 }
 
 @keyframes ellipsis-component2 {
   0% { opacity: 0; }
   25% { opacity: 0; }
   50% { opacity: 0; }
   75% { opacity: 1; }
   100% { opacity: 0; }
 }