Gerrit git cl: make it work with minimal file.

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 90647a713a04f1fe2930a6c784871ca75f615c55..8ef92d301b8eb864e2ee31eb5584d295c8473fcf 100755
--- a/tests/git_cl_test.py
+++ b/tests/git_cl_test.py
@@ -328,6 +328,30 @@ class TestGitCl(TestCase):
       raise result
     return result
 
+  def test_LoadCodereviewSettingsFromFile_gerrit(self):
+    codereview_file = StringIO.StringIO('GERRIT_HOST: true')
+    self.calls = [
+      ((['git', 'config', '--unset-all', 'rietveld.cc'],), CERR1),
+      ((['git', 'config', '--unset-all', 'rietveld.private'],), CERR1),
+      ((['git', 'config', '--unset-all', 'rietveld.tree-status-url'],), CERR1),
+      ((['git', 'config', '--unset-all', 'rietveld.viewvc-url'],), CERR1),
+      ((['git', 'config', '--unset-all', 'rietveld.bug-prefix'],), CERR1),
+      ((['git', 'config', '--unset-all', 'rietveld.cpplint-regex'],), CERR1),
+      ((['git', 'config', '--unset-all', 'rietveld.force-https-commit-url'],),
+        CERR1),
+      ((['git', 'config', '--unset-all', 'rietveld.cpplint-ignore-regex'],),
+        CERR1),
+      ((['git', 'config', '--unset-all', 'rietveld.project'],), CERR1),
+      ((['git', 'config', '--unset-all', 'rietveld.pending-ref-prefix'],),
+        CERR1),
+      ((['git', 'config', '--unset-all', 'rietveld.git-number-footer'],),
+        CERR1),
+      ((['git', 'config', '--unset-all', 'rietveld.run-post-upload-hook'],),
+        CERR1),
+      ((['git', 'config', 'gerrit.host', 'true'],), ''),
+    ]
+    self.assertIsNone(git_cl.LoadCodereviewSettingsFromFile(codereview_file))
+
   @classmethod
   def _is_gerrit_calls(cls, gerrit=False):
     return [((['git', 'config', 'rietveld.autoupdate'],), ''),