Check format of OWNERS files in PRESUBMIT and PanProjectChecks.

Bug: 789773
Change-Id: Iaa721c9971d1834dd796a9cd28a28a83b6482e05
Reviewed-on: https://chromium-review.googlesource.com/1019975
Reviewed-by: Dirk Pranke <dpranke@chromium.org>
Commit-Queue: Edward Lesmes <ehmaldonado@chromium.org>
diff --git a/PRESUBMIT.py b/PRESUBMIT.py
index 13a2428..8c4de46 100644
--- a/PRESUBMIT.py
+++ b/PRESUBMIT.py
@@ -56,6 +56,8 @@
 def CommonChecks(input_api, output_api, tests_to_black_list):
   results = []
   results.extend(input_api.canned_checks.CheckOwners(input_api, output_api))
+  results.extend(input_api.canned_checks.CheckOwnersFormat(
+      input_api, output_api))
   # TODO(maruel): Make sure at least one file is modified first.
   # TODO(maruel): If only tests are modified, only run them.
   tests = DepotToolsPylint(input_api, output_api)