When pin-keyboard comes up the input element is of focus.

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 167 matching lines @@
 
 .pod.focused:not(.multiprofiles-policy-applied) .auth-container {
   background-color: white;
   position: absolute;
   top: 160px;
   width: 160px;
 }
 
 .auth-container.pin-disabled {
   opacity: 1;
-  transition: opacity 200ms ease-in-out 180ms,
-              visibility 200ms ease-in-out 180ms;
+  transition: opacity 200ms ease-in-out 180ms;
   visibility: visible;
 }
 
 .auth-container.pin-enabled {
   opacity: 0;
   transition: none;
   visibility: hidden;
 }
 
 .name-container {
@@ skipping 688 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; }
 }