SSIA. http://html5-demos.appspot.com/static/css/sticky.html
Created attachment 271416 [details] WIP patch
https://github.com/shivamidow/webkit/commit/7d38d75707a9340d6c9c2ae9d8a16e6d8e2493d5
*** This bug has been marked as a duplicate of bug 184961 ***