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

chrome/browser/resources/ntp4/apps_page.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. */
 
 .app {
   outline: none;
   position: absolute;
   text-align: center;
 }
 
 .app-contents {
-  -webkit-transition: -webkit-transform 100ms;
+  transition: transform 100ms;
 }
 
 .app-contents:active:not(.suppress-active),
 .app:not(.click-focus):focus .app-contents:not(.suppress-active),
 .drag-representation:not(.placing) .app-contents {
-  -webkit-transform: scale(1.1);
+  transform: scale(1.1);
 }
 
 /* Don't animate the initial scaling.  */
 .app-contents:active:not(.suppress-active),
 /* Active gets applied right before .suppress-active, so to avoid flicker
  * we need to make the scale go back to normal without an animation. */
 .app-contents.suppress-active {
-  -webkit-transition-duration: 0ms;
+  transition-duration: 0ms;
 }
 
 .app-contents > span {
   display: block;
   overflow: hidden;
   text-overflow: ellipsis;
   white-space: nowrap;
 }
 
 .app-img-container {
@@ skipping 116 matching lines @@
   background-image: -webkit-linear-gradient(
       top, rgb(77, 144, 254), rgb(53, 122, 232));
   border: 1px solid rgb(47, 91, 183);
 }
 
 #app-launcher-promo > img {
   bottom: 0;
   position: absolute;
   right: 30px;
 }