
When we don't have GLX_OML_sync_control, we still can set the frame presentation time, but we always use the system monotonic time, so return that from get_clock_time(). https://bugzilla.gnome.org/show_bug.cgi?id=779039
When we don't have GLX_OML_sync_control, we still can set the frame presentation time, but we always use the system monotonic time, so return that from get_clock_time(). https://bugzilla.gnome.org/show_bug.cgi?id=779039