Revert of Reland "Switch telemetry over to use typ to run the unit tests." (patchset #1 id:1 of https://codereview.chromium.org/707453002/)

Reason for revert:
This seems to return with 0 exit code when tests are failing, see e.g. http://build.chromium.org/p/chromium.mac/builders/Mac10.9%20Tests%20%28dbg%29/builds/18/steps/telemetry_perf_unittests/logs/stdio . Previous build was correctly reporting the steps as failed (http://build.chromium.org/p/chromium.mac/buildstatus?builder=Mac10.9%20Tests%20%28dbg%29&number=17).

Original issue's description:
> Reland "Switch telemetry over to use typ to run the unit tests."
>
> Original review: https://codereview.chromium.org/659293003
>
> Using typ allows us to run the tests in parallel and share
> the logic for parsing the results and uploading them to the
> flakiness dashboard with other python test steps.
>
> TBR=dtu@chromium.org, tonyg@chromium.org, nduca@chromium.org, dpranke@chromium.org
> BUG=402172, 388256
>
> Committed: https://chromium.googlesource.com/chromium/src/+/fc4a811ffe26653019e2213947146a721620e0fc

TBR=dpranke@chromium.org,dtu@chromium.org,nduca@chromium.org,tonyg@chromium.org
NOTREECHECKS=true
NOTRY=true
BUG=402172, 388256

Review URL: https://codereview.chromium.org/708483002

Cr-Commit-Position: refs/heads/master@{#302804}

1 files changed, 9 insertions, 14 deletions

diff --git a/tools/perf/run_tests b/tools/perf/run_tests
index 1ebfe32..6497020 100755
--- a/tools/perf/run_tests
+++ b/tools/perf/run_tests
@@ -9,22 +9,17 @@ 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'))
 
-if __name__ == '__main__':
-  perf_dir = os.path.dirname(os.path.realpath(__file__))
-  telemetry_dir = os.path.realpath(os.path.join(perf_dir, '..', 'telemetry'))
+from telemetry.unittest import gtest_progress_reporter
+from telemetry.unittest import run_tests
 
-  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))
+if __name__ == '__main__':
+  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())