Remove webkit prefixes for transform and perspective in chrome/ styles

chrome/test/data/perf/frame_rate/head.js

 // Copyright (c) 2011 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.
 
 /**
  * @fileoverview  Perform various "gestures" and calculate average frame rate.
  * "Gestures" are recorded scrolling behaviors in terms of time (ms) and
  * absolute positions.
  *
  * How to run a single gesture:
@@ skipping 396 matching lines @@
         __t_last = __get_time();
     }
   }, document.body);
 }
 
 function __start_recording() {
   __start(__advance_gesture_recording);
 }
 
 function __make_body_composited() {
-  document.body.style.webkitTransform = "translateZ(0)";
+  document.body.style.transform = "translateZ(0)";
 }
 
 function __start(gesture_function) {
   if (__running)
     return;
   // Attempt to create a gesture function from a string name.
   if (typeof gesture_function == "string") {
     if (!__gestures[gesture_function]) {
       if (!__gesture_library[gesture_function])
         throw new Error("Unrecognized gesture name");
@@ skipping 56 matching lines @@
 
 function __reset() {
   __running = false;
   __running_all = false;
   document.title = __old_title;
   document.body.scrollTop = 0;
   __init_stats();
 }
 
 function __force_compositor() {
-  document.body.style.webkitTransform = "translateZ(0)";
+  document.body.style.transform = "translateZ(0)";
 }