[Bug 21969] [Custom]: add attributeChangedCallback to the set of prototype callbacks

https://www.w3.org/Bugs/Public/show_bug.cgi?id=21969

--- Comment #4 from Olli Pettay <bugs@pettay.fi> ---
sync mutation observing has the risk of bringing back the problems
mutation events have.

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Received on Wednesday, 8 May 2013 17:27:37 UTC