jonathantneal/diveintohtml5 — pull request #5 by myakura (2011-10-12 18:13:24+00:00)
Title: remove UNKNOWN_ERROR

https://github.com/myakura/diveintohtml5/blob/master/geolocation.html#L144 says:

> The code property will be one of [snip]
> * UNKNOWN_ERROR (0) if anything else goes wrong.

However, UNKNOWN_ERROR was removed from the specification long time ago.
http://www.w3.org/2009/11/02-geolocation-minutes.html

And Gecko and WebKit already removed their impls to match the spec.
http://hg.mozilla.org/mozilla-central/rev/c3924062e8bc
http://trac.webkit.org/changeset/50605

So I don't think there's any need to mention about the constant.