[Bug 19463] MutationRecord added/removedNodes could return empty array, not null

https://www.w3.org/Bugs/Public/show_bug.cgi?id=19463

Adam Klein <adamk@chromium.org> changed:

           What    |Removed                     |Added
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                 CC|                            |adamk@chromium.org

--- Comment #2 from Adam Klein <adamk@chromium.org> ---
(In reply to comment #1)
> Sorry WebKit for not catching this sooner. Olli is right, they should never
> have been allowed to be null to begin with.

Luckily WebKit already had these empty for type = 'childList'; I'd hope that
there's not much code that looks at added/removed nodes for non-childList
records. Just curious, what's the advantage of having those non-null on
attributes/characterData records?

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