[webkit-reviews] review requested: [Bug 65030] Avoiding painting backgrounds if they are fully obscures by an object's foreground : [Attachment 101774] Patch

[bugzilla-daemon at webkit.org]

Simon Fraser (smfr) <simon.fraser at apple.com> has asked	for review:
Bug 65030: Avoiding painting backgrounds if they are fully obscures by an
object's foreground
https://bugs.webkit.org/show_bug.cgi?id=65030

Attachment 101774: Patch
https://bugs.webkit.org/attachment.cgi?id=101774&action=review