Currently we are not painting outlines for tables.
Created attachment 84241 [details]
note that table row outlines does not look supported in IE, opera and firefox draws it incorrectly (try adding a outline to tr in layouttest and try in firefox, you will see incorrect table row and table cell outline overlap). in our code, we do look to paint cell directly without calling rendertablerow paint. So, leaving my patch for checking table outlines and table cell outlines only.
Comment on attachment 84241 [details]
Committed r80040: <http://trac.webkit.org/changeset/80040>
*** Bug 41030 has been marked as a duplicate of this bug. ***
See also: bug 35813, bug 18179.
Yeah this 2 liner outline fix has to be added to a couple of Render* classes. I discovered this while fixing one of the security bugs. Also, rendering outline for table rows and columns is tricky because of the overlap problem in certain scenarios. bug 57439 on iframe should be easy enough (try adding these 2 lines to RenderWidget::paint(PaintInfo& paintInfo, int tx, int ty))