[webkit-reviews] review requested: [Bug 129414] Fix two assertions/crashes in compositing code : [Attachment 225333] Patch

[bugzilla-daemon at webkit.org]

Simon Fraser (smfr) <simon.fraser at apple.com> has asked	for review:
Bug 129414: Fix two assertions/crashes in compositing code
https://bugs.webkit.org/show_bug.cgi?id=129414

Attachment 225333: Patch
https://bugs.webkit.org/attachment.cgi?id=225333&action=review