- add pseudo-classes for :-moz-type-unsupported and :-moz-has-handlerref (and a
content state for the former)
- make nsObjectLoadingContent return the right content state
- Add an XBL binding that gets instantiated for broken plugins
- Make it themable
- Remove a lot of now-unused code in nsObjectFrame
- Fixes pluginfinder.
r+sr=bz, r=mconnor
