Revert 86568 - Add initial framework for performance tests that measure frame rate.

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

Index: chrome/test/data/perf/frame_rate/head.js
===================================================================
--- chrome/test/data/perf/frame_rate/head.js	(revision 86571)
+++ chrome/test/data/perf/frame_rate/head.js	(working copy)
@@ -1,100 +0,0 @@
-// 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.
-
-var __running = false;
-var __old_title = "";
-var __scroll_by = 300;
-var __raf;
-
-var __t_last;
-var __t_est;
-var __t_est_total;
-var __t_est_squared_total;
-var __t_count;
-
-function __init_stats() {
-  __t_last = undefined;
-  __t_est = undefined;
-  __t_est_total = 0;
-  __t_est_squared_total = 0;
-  __t_count = 0;
-}
-__init_stats();
-
-function __calc_results() {
-  var M = __t_est_total / __t_count;
-  var X = __t_est_squared_total / __t_count;
-  var V = X - M * M;
-  var S = Math.sqrt(V);
-
-  var R = new Object();
-  R.mean = 1000.0 / M;
-  R.sigma = R.mean - 1000.0 / (M + S);
-  return R;
-}
-
-function __scroll_down() {
-  var y = window.scrollY;
-  window.scrollBy(0, __scroll_by);
-  if (window.scrollY == y)
-    __stop();
-}
-
-function __update_fps() {
-  var t_now = new Date().getTime();
-  if (window.__t_last) {
-    var t_delta = t_now - __t_last;
-    if (window.__t_est) {
-      __t_est = (0.1 * __t_est) + (0.9 * t_delta);  // low-pass filter
-    } else {
-      __t_est = t_delta;
-    }
-    var fps = 1000.0 / __t_est;
-    document.title = "FPS: " + (fps | 0);
-
-    __t_est_total += t_delta;
-    __t_est_squared_total += t_delta * t_delta;
-    __t_count++;
-  }
-  __t_last = t_now;
-}
-
-function __sched_update() {
-  if (!__raf) {
-    if ("webkitRequestAnimationFrame" in window)
-      __raf = webkitRequestAnimationFrame;
-    else if ("mozRequestAnimationFrame" in window)
-      __raf = mozRequestAnimationFrame;
-  }
-  __raf(function() {
-    if (!__running)
-      return;
-    __update_fps();
-    __scroll_down();
-    __sched_update();
-  });
-}
-
-function __start() {
-  if (__running)
-    return;
-  __old_title = document.title;
-  __running = true;
-  __sched_update();
-}
-
-function __stop() {
-  __running = false;
-  document.title = __old_title;
-}
-
-function __reset() {
-  __stop();
-  document.body.scrollTop = 0;
-  __init_stats();
-}
-
-function __force_compositor() {
-  document.body.style.webkitTransform = "translateZ(0)";
-}