<a ping> can't be enabled in WK2 http://trac.webkit.org/changeset/73312 attempted to enable it but missed pushing the bit into WebCore::Settings in the WebProcess. A few more layout tests can be enabled now, too. In radar as <rdar://problem/10924993>
Created attachment 129150 [details] Patch v1
http://trac.webkit.org/changeset/109055