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

chrome/browser/resources/local_ntp/most_visited_single.js

Index: chrome/browser/resources/local_ntp/most_visited_single.js
diff --git a/chrome/browser/resources/local_ntp/most_visited_single.js b/chrome/browser/resources/local_ntp/most_visited_single.js
index 45db544b506c8f7b4c3c1909eab0df4d564f2043..47e3f672780a9606c1c0fb9c2155b5182ffbb860 100644
--- a/chrome/browser/resources/local_ntp/most_visited_single.js
+++ b/chrome/browser/resources/local_ntp/most_visited_single.js
@@ -260,7 +260,7 @@ var showTiles = function() {
     old.removeAttribute('id');
     old.classList.add('mv-tiles-old');
     old.style.opacity = 0.0;
-    cur.addEventListener('webkitTransitionEnd', function(ev) {
+    cur.addEventListener('transitionend', function(ev) {
       if (ev.target === cur) {
         removeAllOldTiles();
       }
@@ -329,7 +329,7 @@ var addTile = function(args) {
  */
 var blacklistTile = function(tile) {
   tile.classList.add('blacklisted');
-  tile.addEventListener('webkitTransitionEnd', function(ev) {
+  tile.addEventListener('transitionend', function(ev) {
     if (ev.propertyName != 'width') return;
 
     window.parent.postMessage({cmd: 'tileBlacklisted',