Remove webkit prefixes for CSS Animation in chrome/ styles

chrome/browser/resources/ntp4/tile_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. */
 
 .tile-page {
   -webkit-box-orient: vertical;
   display: -webkit-box;
   height: 100%;
   position: relative;
   width: 100%;
@@ skipping 109 matching lines @@
 }
 
 .hovering-on-trash {
   opacity: 0.6;
 }
 
 .animating-tile-page .top-margin {
   -webkit-transition: margin-bottom 200ms;
 }
 
-@-webkit-keyframes bounce {
+@keyframes bounce {
   0% {
     transform: scale(0, 0);
   }
 
   60% {
     transform: scale(1.2, 1.2);
   }
 
   100% {
     transform: scale(1, 1);
   }
 }
 
 .tile > .new-tile-contents {
-  -webkit-animation: bounce 500ms ease-in-out;
+  animation: bounce 500ms ease-in-out;
 }
 
-@-webkit-keyframes blipout {
+@keyframes blipout {
   0% {
     transform: scale(1, 1);
   }
 
   60% {
-    -webkit-animation-timing-function: ease-in;
+    animation-timing-function: ease-in;
     opacity: 1;
     transform: scale(1.3, 0.02);
   }
 
   90% {
     opacity: 0.7;
     transform: scale(0.3, 0.02);
   }
 
   100% {
-    -webkit-animation-timing-function: linear;
+    animation-timing-function: linear;
     opacity: 0;
     transform: scale(0.3, 0.02);
   }
 }
 
 .tile > .removing-tile-contents {
-  -webkit-animation: blipout 300ms;
-  -webkit-animation-fill-mode: forwards;
+  animation: blipout 300ms;
+  animation-fill-mode: forwards;
   pointer-events: none;
 }
 
 .tile-page:not(.selected-card) * {
   -webkit-transition: none !important;
 }
 
 /** Scrollbars ****************************************************************/
 
 .tile-page-content::-webkit-scrollbar {
   width: 13px;
 }
 
 .tile-page-content::-webkit-scrollbar-button {
   display: none;
 }