mozilla-b2g/gaia — pull request #21209 by tkundu (2014-07-01 04:34:18+00:00)
Title: Return early if lockScreen.unlock or lockScreen.lock is undefined.

It fixes gaia_test.py screen lock/unlock issue.
Reference bugid: 1031029

Change-Id: I7b1e5a373e041cf45911f51f5be021cd5856b88b