Reland of Add CC_LIST and --cc to Gerrit issues via API to be similar to CCs in Rietveld

tests/git_cl_test.py

Index: tests/git_cl_test.py
diff --git a/tests/git_cl_test.py b/tests/git_cl_test.py
index 1bb517e38223773a78a2e63fbeba80e6c5ecfbc9..2985d36c6e1eb6c5a96d7600814ff5d1ee472967 100755
--- a/tests/git_cl_test.py
+++ b/tests/git_cl_test.py
@@ -884,7 +884,6 @@ class TestGitCl(TestCase):
     calls += [
         ((['git', 'rev-list',
             expected_upstream_ref + '..' + ref_to_push],), ''),
-        ((['git', 'config', 'rietveld.cc'],), '')
         ]
 
     notify_suffix = 'notify=%s' % ('ALL' if notify else 'NONE')
@@ -893,9 +892,6 @@ class TestGitCl(TestCase):
     else:
       ref_suffix = '%' + notify_suffix
 
-    # Add cc from watch list.
-    ref_suffix += ',cc=joe@example.com'
-
     if reviewers:
       ref_suffix += ',' + ','.join('r=%s' % email
                                    for email in sorted(reviewers))
@@ -925,6 +921,12 @@ class TestGitCl(TestCase):
           ((['git', 'config', 'branch.master.gerritsquashhash',
              'abcdef0123456789'],), ''),
       ]
+    calls += [
+        ((['git', 'config', 'rietveld.cc'],), ''),
+        ((['AddReviewers', 'chromium-review.googlesource.com',
+           123456 if squash else None,
+          ['joe@example.com'], False],), ''),
+    ]
     calls += cls._git_post_upload_calls()
     return calls
 
@@ -958,6 +960,9 @@ class TestGitCl(TestCase):
     self.mock(git_cl.gclient_utils, 'RunEditor',
               lambda *_, **__: self._mocked_call(['RunEditor']))
     self.mock(git_cl, 'DownloadGerritHook', self._mocked_call)
+    self.mock(git_cl.gerrit_util, 'AddReviewers',
+              lambda h, i, add, is_reviewer: self._mocked_call(
+                  ['AddReviewers', h, i, add, is_reviewer]))
 
     self.calls = self._gerrit_base_calls(issue=issue)
     self.calls += self._gerrit_upload_calls(