[webkit-reviews] review requested: [Bug 78186] Avoid compositing invisible fixed positioned elements : [Attachment 126202] patch for preview (missing test)

[bugzilla-daemon at webkit.org]

Xianzhu Wang <wangxianzhu at chromium.org> has asked  for review:
Bug 78186: Avoid compositing invisible fixed positioned elements
https://bugs.webkit.org/show_bug.cgi?id=78186

Attachment 126202: patch for preview (missing test)
https://bugs.webkit.org/attachment.cgi?id=126202&action=review