Gerrit git cl: do per CL check for Gerrit, not repo-wide.

tests/git_cl_test.py

 #!/usr/bin/env python
 # Copyright (c) 2012 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 """Unit tests for git_cl.py."""
 
 import os
 import StringIO
 import stat
@@ skipping 766 matching lines @@
             'test3 test2',    # test2 -> test3
             'test3.1 test2',  # test2 -> test3.1
             'test4 test3',    # test3 -> test4
             'test5 test4',    # test4 -> test5
             'test6 test0',    # test0 -> test6
             'test7',          # test7
         ]
         return '\n'.join(branch_deps)
     self.mock(git_cl, 'RunGit', mock_run_git)
 
-    git_cl.settings = git_cl.Settings()
-    self.mock(git_cl.settings, 'GetIsGerrit', lambda: False)
-
     class RecordCalls:
       times_called = 0
     record_calls = RecordCalls()
     def mock_CMDupload(*args, **_kwargs):
       record_calls.times_called += 1
       return 0
     self.mock(git_cl, 'CMDupload', mock_CMDupload)
 
     self.calls = [
         (('[Press enter to continue or ctrl-C to quit]',), ''),
       ]
 
     class MockChangelist():
       def __init__(self):
         pass
       def GetBranch(self):
         return 'test1'
       def GetIssue(self):
         return '123'
       def GetPatchset(self):
         return '1001'
+      def IsGerrit(self):
+        return False
 
     ret = git_cl.upload_branch_deps(MockChangelist(), [])
     # CMDupload should have been called 5 times because of 5 dependent branches.
     self.assertEquals(5, record_calls.times_called)
     self.assertEquals(0, ret)
 
   def test_gerrit_change_id(self):
     self.calls = [
         ((['git', 'write-tree'], ),
           'hashtree'),
@@ skipping 139 matching lines @@
     self.calls += [
       ((['git', 'apply', '--index', '-p0', '--3way'],), '',
        subprocess2.CalledProcessError(1, '', '', '', '')),
     ]
     self.assertNotEqual(git_cl.main(['patch', '123456']), 0)
 
 if __name__ == '__main__':
   git_cl.logging.basicConfig(
       level=git_cl.logging.DEBUG if '-v' in sys.argv else git_cl.logging.ERROR)
   unittest.main()