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

chrome/browser/resources/print_preview/common/search_bubble.css

 /* Copyright 2014 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. */
 
 /* Container for the elements that make up the search bubble. */
 .search-bubble {
   left: 0;
   margin-top: 5px;
   pointer-events: none;
   position: absolute;
@@ skipping 22 matching lines @@
   content: '';
   left: -1px;
   position: absolute;
   right: -1px;
   top: -1px;
   z-index: -2;
 }
 
 /* Provides the arrow which points at the anchor element. */
 .search-bubble-innards::after {
-  -webkit-transform: rotate(45deg);
   background: linear-gradient(-45deg, rgb(251, 255, 181),
                                       rgb(255, 248, 172) 50%,
                                       rgba(255, 248, 172, 0));
   border: 1px solid rgb(220, 198, 72);
   border-bottom-color: transparent;
   border-right-color: transparent;
   content: '';
   height: 12px;
   left: 53px;
   position: absolute;
   top: -7px;
+  transform: rotate(45deg);
   width: 12px;
   z-index: -1;
 }
 
 .search-bubble-wrapper {
   position: relative;
 }