Add a sketch of a test_perf script

sky/tools/tester/test_harness.cc

-// Copyright 2014 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.
-
-#include "sky/tools/tester/test_harness.h"
-
-#include "base/bind.h"
-#include "base/message_loop/message_loop.h"
-#include <iostream>
-
-namespace sky {
-namespace tester {
-namespace {
-
-std::string WaitForURL() {
-  std::string url;
-  std::cin >> url;
-  return url;
-}
-
-}  // namespace
-
-TestHarness::TestHarness(mojo::View* container)
-    : container_(container),
-      weak_ptr_factory_(this) {
-  std::cout << "#READY\n";
-  std::cout.flush();
-}
-
-TestHarness::~TestHarness() {
-}
-
-void TestHarness::ScheduleRun() {
-  base::MessageLoop::current()->PostTask(FROM_HERE,
-      base::Bind(&TestHarness::Run, weak_ptr_factory_.GetWeakPtr()));
-}
-
-void TestHarness::Run() {
-  DCHECK(!test_runner_);
-  test_runner_.reset(new TestRunner(this, container_, WaitForURL()));
-}
-
-void TestHarness::OnTestComplete() {
-  test_runner_.reset();
-  ScheduleRun();
-}
-
-}  // namespace tester
-}  // namespace sky