[webkit-reviews] review requested: [Bug 107734] Introduce the "stacking container" concept. : [Attachment 184307] Patch

[bugzilla-daemon at webkit.org]

vollick at chromium.org has asked	for review:
Bug 107734: Introduce the "stacking container" concept.
https://bugs.webkit.org/show_bug.cgi?id=107734

Attachment 184307: Patch
https://bugs.webkit.org/attachment.cgi?id=184307&action=review