[webkit-reviews] review requested: [Bug 15023] REGRESSION (r21113-r21143): JavaScript tooltip rendering bug : [Attachment 16042] Cache layers' repaint rects when they turn visible

[bugzilla-daemon at webkit.org]

mitz at webkit.org has asked  for review:
Bug 15023: REGRESSION (r21113-r21143): JavaScript tooltip rendering bug
http://bugs.webkit.org/show_bug.cgi?id=15023

Attachment 16042: Cache layers' repaint rects when they turn visible
http://bugs.webkit.org/attachment.cgi?id=16042&action=edit

------- Additional Comments from mitz at webkit.org
Includes repaint test