Ehsan pointed out that we didn't send out the "intent to implement" for Houdini paint.
(In reply to Milan Sreckovic [:milan] from comment #1)
> Ehsan pointed out that we didn't send out the "intent to implement" for
> Houdini paint.
I'll get that sorted. Thanks!
This API got released with Chrome 65:
Mass bug change to replace various 'parity' whiteboard flags with the new canonical keywords. (See bug 1443764 comment 13.)