It landed in https://github.com/crosswalk-project/crosswalk/pull/1142.

Tip: an easy way to get some context on a directory is looking at the history restricted only to that directory, e.g. `git log dbus/`.

At the moment it have two things: DBusManager (which basically creates a dbus thread for us), and PropertyExporter which is a helper to implement `org.freedesktop.DBus.Properties` interface we are going to use later.

It's completely unrelated to glib. It is also not a wrapper, are extra classes that work together with `src/dbus`.