Things are now filtered based on capabilities.
Created attachment 192910 [details]
Comment on attachment 192910 [details]
FWIW, this was not added for compatibility reasons. It was added to give WebKit clients (non-browsers) control over what panels to show (hide). I don't think anyone has been using it for a while though, so it is fine to remove. We don't honor it in Safari's Web Inspector either.
I actually added it back in 2009 with your blessing :) Since then we upstreamed our work and aligned things. I meant to say that similar things (timeline, etc.) should be controlled using capabilities.
Committed r145717: <http://trac.webkit.org/changeset/145717>