mozilla-b2g/gaia — pull request #4048 by timdream (2012-08-28 21:14:59+00:00)
Title: Lock screen: use setProperty() and removeProperty()

Fix #3871.

Lessen learned from bz in https://bugzilla.mozilla.org/show_bug.cgi?id=786105

* Use empty string instead of 'null' to unset a CSS property.
* Or, use `removeProperty()` which is even better.

I suspect other part of Gaia is also broken because of this Gecko behavior change. I will write an e-mail to dev-gaia for that.