Only HTML documents are currently handled by DOMPatchSupport. Upstreaming https://code.google.com/p/chromium/issues/detail?id=222184
Created attachment 195050 [details] Patch
Comment on attachment 195050 [details] Patch Clearing flags on attachment: 195050 Committed r146897: <http://trac.webkit.org/changeset/146897>
All reviewed patches have been landed. Closing bug.