mozilla-b2g/gaia — pull request #2931 by evelynhung (2012-07-28 01:22:12+00:00)
Title: Generalize all settings synchronization between apps.

Now there are some settings needs to be synced between System app and Settings app.
To generalize all settings instead of registering a callback function for each of them, this way will monitor all checkbox and progress bar settings from System app, and set them back to the UI of Setting app.