This may not make sense in practice but is necessary for testing. Add regression test.

TBR=msb
TEST=smoke test
BUG=23328

Review URL: http://codereview.chromium.org/2238004

git-svn-id: svn://svn.chromium.org/chrome/trunk/tools/depot_tools@48317 0039d316-1c4b-4281-b951-d872f2087c98