DumpRenderTree/qt/DumpRenderTreeQt.cpp calls QWebSettings::enablePersistentStorage which sets up and enables all HTML5 persistent data. All the other calls for setting the persistent path or enabling the persistent feature are redundant and potential source of problems (as it was with bug 34713).
Created attachment 48845 [details] proposed patch
Comment on attachment 48845 [details] proposed patch OK.
Comment on attachment 48845 [details] proposed patch Clearing flags on attachment: 48845 Committed r55013: <http://trac.webkit.org/changeset/55013>
All reviewed patches have been landed. Closing bug.