Before accessing the computed style for populating 'font' property of CanvasRenderingContext2D we have to make sure we have a up-to-date computed style to avoid any stale reference.
Created attachment 237945 [details] Patch
Please take a look, thank you.
Here is the jsfiddle test: http://jsfiddle.net/j424ygda/
Friendly ping!
Comment on attachment 237945 [details] Patch Clearing flags on attachment: 237945 Committed r173591: <http://trac.webkit.org/changeset/173591>
All reviewed patches have been landed. Closing bug.