Enhance content attribute reflection for URL attributes, including adding a non-empty option
Created attachment 61174 [details] Patch
Committed r63057: <http://trac.webkit.org/changeset/63057>
Revision r63057 cherry-picked into qtwebkit-2.2 with commit 8e7daed <http://gitorious.org/webkit/qtwebkit/commit/8e7daed>