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

chrome/browser/resources/chromeos/wallpaper_manager/css/wallpaper_manager.css

 /* Copyright (c) 2013 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 {
   height: 100%;
 }
 
 body {
   -webkit-app-region: drag;
@@ skipping 42 matching lines @@
 #categories-list {
   -webkit-box-orient: horizontal;
   display: -webkit-box;
   height: 54px;
   outline: none;
   width: 100%;
 }
 
 #categories-list > li {
   -webkit-box-align: center;
-  -webkit-transition: border-top 130ms ease;
   -webkit-user-select: none;
   border-top: 4px solid transparent;
   color: #777;
   display: -webkit-box;
   height: 50px;
+  transition: border-top 130ms ease;
 }
 
 #categories-list:not([disabled]) > li:hover {
   border-top-color: rgba(255, 255, 255, 0.4);
   cursor: pointer;
 }
 
 #categories-list > li[selected] {
   color: rgb(70, 78, 90);
   cursor: default;
@@ skipping 21 matching lines @@
 
 #window-close-button {
   background-image: url(../images/ui/close-white.png);
 }
 
 #window-close-button:hover {
   background-image: url(../images/ui/close-white-hover.png);
 }
 
 #bar {
-  -webkit-transition: left 130ms ease-in-out;
   background-color: #eee;
   height: 4px;
   position: absolute;
   top: 0;
+  transition: left 130ms ease-in-out;
 }
 
 .dialog-main {
   display: flex;
   flex: 1;
 }
 
 #category-container {
   flex: 1;
   position: relative;
@@ skipping 155 matching lines @@
 
 .progress-bar {
   background-color: rgba(255, 255, 255, 0.7);
   height: 6px;
   position: absolute;
   top: 62px;
   width: 100%;
 }
 
 .progress-track {
-  -webkit-transition: width 1ms linear;
   background-color: rgb(66, 129, 244);
   height: 100%;
+  transition: width 1ms linear;
   width: 0;
 }
 
 .overlay-container {
   -webkit-box-align: center;
   -webkit-box-orient: vertical;
   -webkit-box-pack: center;
   background-color: rgba(25, 25, 25, 0.25);
   bottom: 0;
   display: -webkit-box;
@@ skipping 65 matching lines @@
   margin-right: 4px;
   opacity: 0.7;
   position: relative;
   top: 4px;
   width: 17px;
 }
 
 #surprise-me #checkbox.checked {
   background-image: url(../images/ui/checkbox_checked.png);
 }