cros_mark_as_stable.py was updated on Sep 8, but the unit test was not updated
to match. This patch fixes the unit test.
BUG=chromium-os:7586
TEST=Ran unit test.
Change-Id: I283ef33e172a95efc41b4090dc4f67c9d84dd9a3
Review URL: http://codereview.chromium.org/3682003
Code was changed to add a CR. Fix tests to accomodate.
BUG=5258
TEST=Unittests pass again.
Change-Id: Iacdbffb14d14f60a43883db3ee12b99a5eeb9f65
Review URL: http://codereview.chromium.org/3014045