[webkit-reviews] review requested: [Bug 59775] Mask placement on composited layer is incorrect sometimes : [Attachment 91634] Patch

[bugzilla-daemon at webkit.org]

Simon Fraser (smfr) <simon.fraser at apple.com> has asked	for review:
Bug 59775: Mask placement on composited layer is incorrect sometimes
https://bugs.webkit.org/show_bug.cgi?id=59775

Attachment 91634: Patch
https://bugs.webkit.org/attachment.cgi?id=91634&action=review