Add a sketch of a test_perf script

sky/tools/tester/test_harness.h

-// 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.
-
-#ifndef SKY_TOOLS_TESTER_TEST_HARNESS_H_
-#define SKY_TOOLS_TESTER_TEST_HARNESS_H_
-
-#include "base/memory/weak_ptr.h"
-#include "sky/tools/tester/test_runner.h"
-
-namespace mojo{
-class View;
-}
-
-namespace sky {
-namespace tester {
-
-class TestHarness : public TestRunnerClient {
- public:
-  explicit TestHarness(mojo::View* container);
-  virtual ~TestHarness();
-
-  void ScheduleRun();
-
- private:
-  void Run();
-  void OnTestComplete() override;
-
-  mojo::View* container_;
-  scoped_ptr<TestRunner> test_runner_;
-  base::WeakPtrFactory<TestHarness> weak_ptr_factory_;
-
-  MOJO_DISALLOW_COPY_AND_ASSIGN(TestHarness);
-};
-
-}  // namespace tester
-}  // namespace sky
-
-#endif  // SKY_TOOLS_TESTER_TEST_HARNESS_H_