Reduce usage of webkit CSS prefixes in chrome/browser/resources

chrome/browser/resources/uber/uber_frame.css

 /* Copyright (c) 2012 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. */
 
 html:not(.focus-outline-visible) :focus {
   outline: none;
 }
 
 body {
   overflow: hidden;
   padding-top: 20px;
 }
 
 html.changing-content body {
-  -webkit-transition: -webkit-transform 100ms;
+  transition: transform 100ms;
 }
 
 h1 {
   -webkit-margin-start: 23px;
   color: rgb(92, 97, 102);
   margin-bottom: 1em;
   /* This value must match the top padding of the uber page header. */
   margin-top: 21px;
 }
 
@@ skipping 35 matching lines @@
   padding: 0;
 }
 
 .selected > button {
   color: rgb(70, 78, 90);
 }
 
 html[guestMode='true'] .hide-in-guest {
   display: none;
 }