Remove webkit prefixes for CSS Animation in chrome/ styles

chrome/browser/resources/local_ntp/local_ntp.css

 /* Copyright 2015 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. */
 
 /* TODO: Need to discuss with NTP folks before we remove font-family from the
  * body tag. */
 body {
   background-attachment: fixed !important;
   cursor: default;
   font-family: arial, sans-serif;
@@ skipping 118 matching lines @@
   top: 5px;
   visibility: hidden;
   width: 1px;
 }
 
 html[dir=rtl] #cursor {
   left: auto;
   right: 9px;
 }
 
-@-webkit-keyframes blink {
+@keyframes blink {
   0% {
     opacity: 1;
   }
   61.55% {
     opacity: 0;
   }
 }
 
 body.fakebox-drag-focused #fakebox-text,
 body.fakebox-focused #fakebox-text {
   visibility: hidden;
 }
 
 body.fakebox-drag-focused #cursor {
   visibility: inherit;
 }
 
 body.fakebox-focused #cursor {
-  -webkit-animation: blink 1.3s step-end infinite;
+  animation: blink 1.3s step-end infinite;
   visibility: inherit;
 }
 
 #most-visited {
   -webkit-user-select: none;
   margin-top: 64px;
   text-align: -webkit-center;
 }
 
 /* Non-Google pages have no Fakebox, so don't need top margin. */
@@ skipping 107 matching lines @@
   left: 8px;
   right: auto;
   text-align: right;
 }
 
 #mv-single {
   border: none;
   height: 100%;
   width: 100%;
 }