Comment 118 for bug 908508

I encountered the same question while building firefox11.0 and patches here seem like to be the right answer.
But when I checked the latest patch,which is modified on 2012-03-06 08:11 PST, by Landry Breuil,I found this patch can hardly match souce code in js/src of FF11.0.
I wonder that if the patch only support for FF10.0 or that I have checked out the wrong version patch?
By the way, can anyone tell me how to use the patch here?Each time I used it ,I just copy the code of the patch down and then manually compared it with the js/src. which takes a rather long time and you know,I am just irritated by that.
Any useful suggestions would be appreciated,thx!