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

chrome/browser/resources/options/sync_setup_overlay.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. */
 
 /* TODO(jhawkins): Organize these by page. */
 
 #sync-setup-overlay * h4 {
   margin: 15px 0 5px;
 }
 
@@ skipping 193 matching lines @@
 #learn-more-link {
   float: right;
 }
 
 html[dir='rtl'] #learn-more-link {
   float: left;
 }
 
 #customize-link,
 #use-default-link {
-  -webkit-transition: opacity 250ms;
+  transition: opacity 250ms;
 }