[webkit-reviews] review requested: [Bug 112457] Determine background visibility at layout time : [Attachment 193412] patch 2

[bugzilla-daemon at webkit.org]

Antti Koivisto <koivisto at iki.fi> has asked  for review:
Bug 112457: Determine background visibility at layout time
https://bugs.webkit.org/show_bug.cgi?id=112457

Attachment 193412: patch 2
https://bugs.webkit.org/attachment.cgi?id=193412&action=review

------- Additional Comments from Antti Koivisto <koivisto at iki.fi>
Re-check the visibility on repaint-only style change. Add a test.