Make sure the a11y hierarchy under an AtkPlug is generated when embedding.
Make sure the a11y hierarchy under an AtkPlug is generated when embedding.

It should be enough to retrieve some info about the children, in the
socket adaptor's handler for the "Embedded" D-Bus method. Asking for
the number of the plug's children seems to be a good candidate.

https://bugzilla.gnome.org/show_bug.cgi?id=663876

GNOME/at-spi2-core,GNOME/at-spi2-core,Distrotech/at-spi2-atk,GNOME/at-spi2-core,GNOME/at-spi2-atk,Distrotech/at-spi2-atk