Allow overriding base-url in git-cl.

This is useful if git-cl has no way to find out the original svn repo's url
and the user does not wish to configure git-svn and fetch the repository.

Review URL: http://codereview.chromium.org/9969099

git-svn-id: svn://svn.chromium.org/chrome/trunk/tools/depot_tools@130372 0039d316-1c4b-4281-b951-d872f2087c98
diff --git a/tests/git_cl_test.py b/tests/git_cl_test.py
index 5f3394f..29e5cc5 100755
--- a/tests/git_cl_test.py
+++ b/tests/git_cl_test.py
@@ -123,6 +123,7 @@
   def _git_upload_calls():
     return [
       ((['git', 'config', 'rietveld.cc'],), ''),
+      ((['git', 'config', 'branch.master.base-url'],), ''),
       ((['git', 'config', '--get-regexp', '^svn-remote\\.'],),
         (('', None), 0)),
       ((['git', 'rev-parse', '--show-cdup'],), ''),