Per Maciej: othermaciej: new methods should be added to a renamed interface that inherits from the original, like IWebUIDelegate2 othermaciej: and the framework should explicitly check whether that interface is implemented before calling them
Created attachment 34622 [details] refactoring of interfaces
Created attachment 34624 [details] refactoring of interfaces no tabs this time in my ChangeLog
I've added aroben and bdash in case they want to review and/or land the fix themselves, otherwise if someone reviews it I can land it tomorrow when someone is around to babysit the Safari build to make sure this fixes it.
Comment on attachment 34624 [details] refactoring of interfaces r=me, thanks for fixing, and sorry for overlooking this.
Landed with some style fix-ups in r47084.