WebKit implements <a ping>, but not <area ping>, as also specified by HTML5.
HTMLAreaElement is a subclass of HTMLAnchorElement, and I think it should inherit ping attribute support. I just did a quick test on Chrome 19, and <area ping> seemed to work as intended.
We don't have any layout test coverage, though, so we should add some.
> HTMLAreaElement is a subclass of HTMLAnchorElement
Ah, I didn't realize this. Good news!
Created attachment 260640 [details]
Created attachment 260650 [details]
This patch depends on the patch for bug #148828
Committed r199822: <http://trac.webkit.org/changeset/199822>