Comment 18 for bug 331564

Ok, I understand your points, but I would have preferred the other way because:
- no code duplication
- the notification are better integrated into the compositing
animations (so they follow the configuration of animations)
If a user chooses metacity instead of compiz, this means (maybe?) that
he wants less animations. And so is if he disables the compiz
animation plugin.
This is my point of view.

Thank you!