gdk/backend: Use the context creation hooks
gdk/backend: Use the context creation hooks

Same as it has happened to the X11 backend.

GNOME/clutter,heysion/clutter-clone,djdeath/clutter,collects/clutter,heysion/clutter-clone,heysion/clutter-clone,jigpu/clutter,jigpu/clutter,jigpu/clutter,Distrotech/clutter,Distrotech/clutter,Distrotech/clutter,GNOME/clutter,djdeath/clutter,jigpu/clutter,Distrotech/clutter,ebassi/clutter,djdeath/clutter,kerrickstaley/clutter-vala,collects/clutter,djdeath/clutter-multithreaded,kerrickstaley/clutter-vala,collects/clutter,jigpu/clutter,djdeath/clutter-android,ebassi/clutter,djdeath/clutter,heysion/clutter-clone,collects/clutter,ebassi/clutter,djdeath/clutter-multithreaded,djdeath/clutter-android,Distrotech/clutter,djdeath/clutter,heysion/clutter-clone,ebassi/clutter,kerrickstaley/clutter-vala,djdeath/clutter-android,GNOME/clutter,djdeath/clutter-multithreaded,jigpu/clutter,kerrickstaley/clutter-vala,collects/clutter,djdeath/clutter-multithreaded,djdeath/clutter-android,djdeath/clutter-android,GNOME/clutter,GNOME/clutter,Distrotech/clutter,djdeath/clutter,ebassi/clutter