Fix handling for click that brings lock screen app to foreground

ui/login/account_picker/md_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 209 matching lines @@
 }
 
 .auth-container,
 .password-entry-container,
 .reauth-hint-container {
   display: none;
 }
 
 .input-line {
   display: none;
+  height: 1px;
   opacity: 0.34;
   position: absolute;
   stroke: #FFFFFF;
   stroke-width: 1px;
   top: 40px;
 }
 
 .input-present .input-line {
   opacity: 1;
 }
@@ skipping 886 matching lines @@
 .small-pod.extra-small .small-pod-name {
   left: 76px;
   padding: 16px 0;
   width: 190px;
 }
 
 @keyframes switch-image {
   from { transform: rotate3d(0, 1, 0, 90deg); }
   to { transform: none; }
 }