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[Bug 19402] MutationObservers: When appending a record to the queue the last item needs to be replaced if it represents the same mutation and the new record has an oldValue

From: <bugzilla@jessica.w3.org>
Date: Fri, 09 Nov 2012 12:12:15 +0000
To: public-webapps-bugzilla@w3.org
Message-ID: <bug-19402-2532-RZGWorTAo6@http.www.w3.org/Bugs/Public/>
https://www.w3.org/Bugs/Public/show_bug.cgi?id=19402

--- Comment #5 from Adam Klein <adamk@chromium.org> ---
(In reply to comment #4)
> I would like some review first before committing this. I merged the various
> queue algorithms into one and I believe I have addressed the problem, but
> I'm not confident: http://html5.org/temp/mo-queue.html

Looks good to me, assuming that this doesn't regress the recent change to make
removedNodes and addedNodes non-nullable on MutationRecord by only setting them
if passed in (I'm not clear on how WebIDL works there).

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