Simplify notify behavior in git-cl

Change-Id: I872658970c04cdadda2b0eaffd95e10717c09493
Reviewed-on: https://chromium-review.googlesource.com/575009
Reviewed-by: Andrii Shyshkalov <tandrii@chromium.org>
Commit-Queue: Aaron Gable <agable@chromium.org>

gerrit_util.py

@@ -717,7 +717,7 @@ def SetReview(host, change, msg=None, labels=None, notify=None, ready=None):
     body['message'] = msg
   if labels:
     body['labels'] = labels
-  if notify:
+  if notify is not None:
     body['notify'] = 'ALL' if notify else 'NONE'
   if ready:
     body['ready'] = True

git_cl.py

@@ -3117,7 +3117,7 @@ class _GerritChangelistImpl(_ChangelistCodereviewBase):
       print('Adding self-LGTM (Code-Review +1) because of TBRs.')
       gerrit_util.SetReview(
           self._GetGerritHost(), self.GetIssue(),
-          labels={'Code-Review': 1}, notify=bool(options.send_mail))
+          msg='Self-approving for TBR', labels={'Code-Review': 1})
 
     return 0
 
@@ -3202,11 +3202,10 @@ class _GerritChangelistImpl(_ChangelistCodereviewBase):
         _CQState.DRY_RUN: 1,
         _CQState.COMMIT:  2,
     }
-    kwargs = {'labels': {'Commit-Queue': vote_map[new_state]}}
-    if new_state == _CQState.DRY_RUN:
-      # Don't spam everybody reviewer/owner.
-      kwargs['notify'] = False
-    gerrit_util.SetReview(self._GetGerritHost(), self.GetIssue(), **kwargs)
+    labels = {'Commit-Queue': vote_map[new_state]}
+    notify = False if new_state == _CQState.DRY_RUN else None
+    gerrit_util.SetReview(self._GetGerritHost(), self.GetIssue(),
+                          labels=labels, notify=notify)
 
   def CannotTriggerTryJobReason(self):
     try:

tests/git_cl_test.py

@@ -623,8 +623,8 @@ class TestGitCl(TestCase):
               lambda h, i, reviewers, ccs, notify: self._mocked_call(
                   'AddReviewers', h, i, reviewers, ccs, notify))
     self.mock(git_cl.gerrit_util, 'SetReview',
-              lambda h, i, labels, notify: self._mocked_call(
-                  'SetReview', h, i, labels, notify))
+              lambda h, i, msg=None, labels=None, notify=None:
+                  self._mocked_call('SetReview', h, i, msg, labels, notify))
     self.mock(git_cl.gerrit_util.GceAuthenticator, 'is_gce',
               classmethod(lambda _: False))
     self.mock(git_cl, 'DieWithError',
@@ -1605,7 +1605,8 @@ class TestGitCl(TestCase):
     if tbr:
       calls += [
         (('SetReview', 'chromium-review.googlesource.com',
-          123456 if squash else None, {'Code-Review': 1}, notify), ''),
+          123456 if squash else None, 'Self-approving for TBR',
+          {'Code-Review': 1}, None), ''),
       ]
     calls += cls._git_post_upload_calls()
     return calls