I think we may need to do this before unprefixing IndexedDB to get the dictionary behavior right :-/
In any case, it will be nice to ditch the XPCOM interfaces.
We realized we can fake what we need for unprefixing.
We should be able to close this bug once the fix for bug 832883 appears on m-c.
Bug 832883 is fixed. This bug is closed. \o/