Remove obsolete v8_benchmark. It was replaced with Octane on the perf bots.

chrome/test/perf/v8_benchmark_uitest.js

-/*
-  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.
-*/
-
-// Automation utilities for running the V8 Benchmark as a UI test.
-
-function Automation() {
-  this.score = '';
-  this.results = {};
-}
-
-Automation.prototype.SetDone = function() {
-  console.log("score: " + this.GetScore());
-  for (var result in this.results) {
-    if (this.results.hasOwnProperty(result))
-      console.log(result + ": " + this.results[result]);
-  }
-  document.cookie = '__done=1; path=/';
-};
-
-Automation.prototype.SetScore = function (score) {
-  this.score = score;
-};
-
-Automation.prototype.GetScore = function() {
-  return this.score;
-};
-
-Automation.prototype.AddResult = function(name, result) {
-  this.results[name] = result;
-};
-
-Automation.prototype.GetResults = function() {
-  return this.results;
-};
-
-automation = new Automation();