[webkit-reviews] review requested: [Bug 91290] Support an event propagation across seamless iframes. : [Attachment 168866] Sync with ToT

[bugzilla-daemon at webkit.org]

Hayato Ito <hayato at chromium.org> has asked  for review:
Bug 91290: Support an event propagation across seamless iframes.
https://bugs.webkit.org/show_bug.cgi?id=91290

Attachment 168866: Sync with ToT
https://bugs.webkit.org/attachment.cgi?id=168866&action=review