[webkit-reviews] review requested: [Bug 200819] [ContentChangeObserver] Add ContentChangeObserver::elementDidBecomeHidden : [Attachment 376511] Patch

[bugzilla-daemon at webkit.org]

zalan <zalan at apple.com> has asked  for review:
Bug 200819: [ContentChangeObserver] Add
ContentChangeObserver::elementDidBecomeHidden
https://bugs.webkit.org/show_bug.cgi?id=200819

Attachment 376511: Patch

https://bugs.webkit.org/attachment.cgi?id=376511&action=review