headless: Don't run tests during the build

testing/scripts/headless_python_unittests.py

 #!/usr/bin/env python
-# Copyright 2015 The Chromium Authors. All rights reserved.
+# Copyright 2016 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.
 
 import json
 import os
 import sys
 
 
 import common
 
 
 def main_run(args):
-  filter_tests = []
-  if args.filter_file:
-    filter_tests = json.load(args.filter_file)
+  typ_path = os.path.abspath(os.path.join(
+      os.path.dirname(__file__), os.path.pardir, os.path.pardir,
+      'third_party', 'typ'))
+  _AddToPathIfNeeded(typ_path)
+  import typ
 
+  top_level_dir = os.path.join(common.SRC_DIR, 'headless', 'lib', 'browser')
   with common.temporary_file() as tempfile_path:
-    rc = common.run_runtest(args, [
-        '--test-type', 'telemetry_gpu_unittests',
-        '--run-python-script',
-        os.path.join(common.SRC_DIR,
-                     'content', 'test', 'gpu', 'run_unittests.py'),
-        '--retry-limit', '3',
-        '--write-full-results-to', tempfile_path,
-    ] + filter_tests)
+    rc = typ.main(
+        argv=[],
+        top_level_dir=top_level_dir,
+        write_full_results_to=tempfile_path,
+        coverage_source=[top_level_dir])
 
     with open(tempfile_path) as f:
       results = json.load(f)
 
   parsed_results = common.parse_common_test_results(results, test_separator='.')
   failures = parsed_results['unexpected_failures']
 
   json.dump({
       'valid': bool(rc <= common.MAX_FAILURES_EXIT_STATUS and
                    ((rc == 0) or failures)),
       'failures': failures.keys(),
   }, args.output)
 
   return rc
 
 
 def main_compile_targets(args):
   json.dump([], args.output)
 
 
+def _AddToPathIfNeeded(path):
+  if path not in sys.path:
+    sys.path.insert(0, path)
+
+
 if __name__ == '__main__':
   funcs = {
     'run': main_run,
     'compile_targets': main_compile_targets,
   }
   sys.exit(common.run_script(sys.argv[1:], funcs))