The following tests should be using dumpAsMarkup
Turned out that editing/undo/redo-style.html doesn't need to be converted since it's already a dumpAsText test and the output doesn't rely on the DOM or a subtree.
Created attachment 62489 [details]
converts the tests.
Landed as http://trac.webkit.org/changeset/64013. Thank you for the responsive review, Darin.