[webkit-reviews] review requested: [Bug 93661] MutationObservers should not create circular, leaky references : [Attachment 161050] Patch

[bugzilla-daemon at webkit.org]

Elliott Sprehn <esprehn at chromium.org> has asked  for review:
Bug 93661: MutationObservers should not create circular, leaky references
https://bugs.webkit.org/show_bug.cgi?id=93661

Attachment 161050: Patch
https://bugs.webkit.org/attachment.cgi?id=161050&action=review

------- Additional Comments from Elliott Sprehn <esprehn at chromium.org>
Fix cicular references and dropped wrappers. This patch is rather big since it
introduces new primitives for doing this abstractly which should also benefit
UndoManager and future APIs. Im not sure how to write tests for this, does
someone have an example of tests for leaks?