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

chrome/browser/resources/net_internals/timeline_view.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. */
 
 #timeline-view-selection-div {
   display: inline-block;
   overflow-y: auto;
 }
 
 #timeline-view-selection-toggle {
   background-color: #fff;
   background-image: url(chrome://resources/images/select.png);
   border: none;
   height: 8px;
   padding: none;
   width: 19px;
 }
 
 .timeline-view-rotateleft {
-  -webkit-transform: rotate(90deg);
+  transform: rotate(90deg);
 }
 
 .timeline-view-rotateright {
-  -webkit-transform: rotate(270deg);
+  transform: rotate(270deg);
 }
 
 #timeline-view-selection-div ul {
   margin-top: 0;
   padding-left: 10px;
 }
 
 #timeline-view-selection-div li {
   list-style: none;
   white-space: nowrap;
@@ skipping 50 matching lines @@
 }
 
 #timeline-view-scrollbar-div {
   overflow-x: scroll;
   overflow-y: hidden;
 }
 
 #timeline-view-scrollbar-inner-div {
   height: 1px;
 }