[geometry] JSON serialization of a DOMRectList

[zcorpan]

#186 adds back DOMRectList.

See https://www.w3.org/Bugs/Public/show_bug.cgi?id=27428 - consider specifying toJSON/ serializer as an array.

cc @bzbarsky @cdumez @hwanseung

[tobie]

So you should just define your own toJSON operation that returns sequence<DOMRect>.

[dirkschulze]

Beside the stated use case in the referenced Bugzilla issue there is not much interest it seems. My suggestion would be to either close this issue or defer it to level 2 of Geometry Interfaces.

[annevk]

Closing this seems reasonable to me. In general we don't define toJSON unless there's a compelling use case.

[zcorpan]

OK with me to close this.