Replace -webkit-transform with transform in Chrome UI

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 484 matching lines @@
 
 .action-box-area.active ~ .action-box-menu:not(.menu-moved-up) {
   top: 18px;
 }
 
 .action-box-area.active ~ .action-box-menu.menu-moved-up {
   bottom: 207px;
 }
 
 .action-box-area.menu-moved-up {
-  -webkit-transform: rotate(180deg);
+  transform: rotate(180deg);
 }
 
 html[dir=rtl] .action-box-area.active ~ .action-box-menu {
   left: 5px;
   right: auto;
 }
 
 .action-box-menu-title {
   color: #757575;
   display: flex;
@@ skipping 299 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; }
 }