mozilla-b2g/gaia — pull request #10139 by es92 (2013-05-31 23:30:32+00:00)
Title: Bug 865750 - multilevel_visibility_monitor.js

[Bugzilla](https://bugzilla.mozilla.org/show_bug.cgi?id=865750)

A rewrite of visibility_monitor.js able to monitor nodes at any depth, not just direct children.