Adding check for team and component tags in owners files.

tools/checkteamtags/run_tests

Index: tools/checkteamtags/run_tests
diff --git a/tools/checkteamtags/run_tests b/tools/checkteamtags/run_tests
new file mode 100755
index 0000000000000000000000000000000000000000..62040289ecdec19db7170ba2442e14abd7a51ca4
--- /dev/null
+++ b/tools/checkteamtags/run_tests
@@ -0,0 +1,41 @@
+#!/usr/bin/env python
+# Copyright 2017 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.
+
+"""Runs all tests in all unit test modules in this directory."""
+
+import os
+import sys
+import unittest
+import logging
+
+SRC = os.path.join(os.path.dirname(__file__), os.path.pardir, os.path.pardir)
+
+
+def main():
+  if 'full-log' in sys.argv:
+    # Configure logging to show line numbers and logging level
+    fmt = '%(module)s:%(lineno)d - %(levelname)s: %(message)s'
+    logging.basicConfig(level=logging.DEBUG, stream=sys.stdout, format=fmt)
+  elif 'no-log' in sys.argv:
+    # Only WARN and above are shown, to standard error. (This is the logging
+    # module default config, hence we do nothing here)
+    pass
+  else:
+    # Behave as before. Make logging.info mimic print behavior
+    fmt = '%(message)s'
+    logging.basicConfig(level=logging.INFO, stream=sys.stdout, format=fmt)
+
+  suite = unittest.TestSuite()
+  loader = unittest.TestLoader()
+  script_dir = os.path.dirname(__file__)
+  suite.addTests(loader.discover(start_dir=script_dir, pattern='*_test.py'))
+
+  print 'Running unit tests in %s...' % os.path.abspath(script_dir)
+  result = unittest.TextTestRunner(verbosity=1).run(suite)
+  return 0 if result.wasSuccessful() else 1
+
+
+if __name__ == '__main__':
+  sys.exit(main())