[webkit-reviews] review requested: [Bug 161528] Add validations for a synchronously constructed custom element : [Attachment 287731] Patch

[bugzilla-daemon at webkit.org]

Ryosuke Niwa <rniwa at webkit.org> has asked  for review:
Bug 161528: Add validations for a synchronously constructed custom element
https://bugs.webkit.org/show_bug.cgi?id=161528

Attachment 287731: Patch

https://bugs.webkit.org/attachment.cgi?id=287731&action=review