[webkit-reviews] review requested: [Bug 162627] Second parameter to MutationObserver.observe() should be optional : [Attachment 289990] Patch

[bugzilla-daemon at webkit.org]

Chris Dumez <cdumez at apple.com> has asked  for review:
Bug 162627: Second parameter to MutationObserver.observe() should be optional
https://bugs.webkit.org/show_bug.cgi?id=162627

Attachment 289990: Patch

https://bugs.webkit.org/attachment.cgi?id=289990&action=review