Revert of Switch telemetry over to use typ to run the unit tests.

tools/perf/run_tests

 #!/usr/bin/env python
 # Copyright 2013 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.
 
 """This script runs unit tests of the code in the perf directory.
 
 This script DOES NOT run benchmarks. run_benchmark does that.
 """
 
 import os
-import subprocess
 import sys
 
+sys.path.append(os.path.join(os.path.dirname(__file__), os.pardir, 'telemetry'))
+
+from telemetry.unittest import gtest_progress_reporter
+from telemetry.unittest import run_tests
+
 
 if __name__ == '__main__':
-  perf_dir = os.path.dirname(os.path.realpath(__file__))
-  telemetry_dir = os.path.realpath(os.path.join(perf_dir, '..', 'telemetry'))
-
-  env = os.environ.copy()
-  if 'PYTHONPATH' in env:
-    env['PYTHONPATH'] = env['PYTHONPATH'] + os.pathsep + telemetry_dir
-  else:
-    env['PYTHONPATH'] = telemetry_dir
-
-  path_to_run_tests = os.path.join(telemetry_dir, 'telemetry', 'unittest',
-                                   'run_tests.py')
-  argv = ['--top-level-dir', perf_dir] + sys.argv[1:]
-  sys.exit(subprocess.call([sys.executable, path_to_run_tests] + argv,
-                           env=env))
+  base_dir = os.path.dirname(os.path.realpath(__file__))
+  progress_reporters = [
+      gtest_progress_reporter.GTestProgressReporter(sys.stdout)]
+  run_tests.config = run_tests.Config(base_dir, [base_dir], progress_reporters)
+  sys.exit(run_tests.RunTestsCommand.main())