Otherwise, the output was:
  fatal: Needed a single revision
  invalid upstream origin

R=szager@chromium.org
BUG=
TEST=


Review URL: https://chromiumcodereview.appspot.com/10784045

git-svn-id: svn://svn.chromium.org/chrome/trunk/tools/depot_tools@147064 0039d316-1c4b-4281-b951-d872f2087c98