Use ElementTraversal in SelectorDataList::execute https://bugs.webkit.org/show_bug.cgi?id=116131 Reviewed by Darin Adler. Use ElementTraversal::firstWithin and ElementTraversal::next to simplify the code. * dom/SelectorQuery.cpp: (WebCore::SelectorDataList::execute): git-svn-id: http://svn.webkit.org/repository/webkit/trunk@150099 268f45cc-cd09-0410-ab3c-d52691b4dbfc