Owen W. Taylor 95d9a95b2b Add meta_ui_window_is_dummy()
For reasons related to interaction between the GTK+ CSS code and the
frame sync protocol, the dummy GtkWindow that MetaUI creates to track
theme properties has to be mapped and have MetaWindow associated with it.
Add a private function so that the test framework can filter this out.

https://bugzilla.gnome.org/show_bug.cgi?id=736505
2014-09-12 11:00:55 -04:00
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