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>

PRESUBMIT.py

@@ -56,6 +56,8 @@ def DepotToolsPylint(input_api, output_api):
 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)

presubmit_canned_checks.py

@@ -1013,6 +1013,10 @@ def PanProjectChecks(input_api, output_api,
         print "  %s took a long time: %dms" % (snapshot_memory[1], delta_ms)
     snapshot_memory[:] = (dt2, msg)
 
+  snapshot("checking owners files format")
+  results.extend(input_api.canned_checks.CheckOwnersFormat(
+      input_api, output_api))
+
   if owners_check:
     snapshot("checking owners")
     results.extend(input_api.canned_checks.CheckOwners(