Implement git cl lint.

Review URL: https://codereview.chromium.org/134223010

git-svn-id: svn://svn.chromium.org/chrome/trunk/tools/depot_tools@256289 0039d316-1c4b-4281-b951-d872f2087c98
diff --git a/tests/git_cl_test.py b/tests/git_cl_test.py
index 1be5290..e5caec5 100755
--- a/tests/git_cl_test.py
+++ b/tests/git_cl_test.py
@@ -674,6 +674,10 @@
            'rietveld.viewvc-url'],), ''),
         ((['git', 'config', '--unset-all',
            'rietveld.bug-prefix'],), ''),
+        ((['git', 'config', '--unset-all',
+           'rietveld.cpplint-regex'],), ''),
+        ((['git', 'config', '--unset-all',
+           'rietveld.cpplint-ignore-regex'],), ''),
         ((['git', 'config', 'gerrit.host',
            'gerrit.chromium.org'],), ''),
         # DownloadHooks(False)