presubmit: GerritAccessor has project field, not repo field

Change-Id: I712c39a6171e11cf65d8663ef4ee1333911931df
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/tools/depot_tools/+/2776158
Auto-Submit: Edward Lesmes <ehmaldonado@chromium.org>
Reviewed-by: Sky Malice <skym@chromium.org>
Reviewed-by: Gavin Mak <gavinmak@google.com>
Commit-Queue: Gavin Mak <gavinmak@google.com>

presubmit_support.py

@@ -470,7 +470,7 @@ class GerritAccessor(object):
   def IsCodeOwnersEnabledOnRepo(self):
     if self.code_owners_enabled is None:
       self.code_owners_enabled = gerrit_util.IsCodeOwnersEnabledOnRepo(
-          self.host, self.repo)
+          self.host, self.project)
     return self.code_owners_enabled