fast/overflow/overflow-focus-ring.html seems double-drawn on ToT I'm testing with r43332. I ran the pixel tests just now and fast/overflow/overflow-focus-ring.html, the ring seems double drawn.
Looks like the same thing that's happened to the textarea I'm typing in right now.
Created attachment 30161 [details] Do not paint a self-painting layer's outline in paintLayer()
Comment on attachment 30161 [details] Do not paint a self-painting layer's outline in paintLayer() r=me
Fixed in <http://trac.webkit.org/projects/webkit/changeset/43458>.