Use Undefined for enums when it's explicitly defined.

[lokokung]

No description provided.

[kainino0x]

For some others we just set the default to undefined in the yml:

webgpu-headers/webgpu.yml

Line 2541 in c51643d

default: undefined

That's a bit simpler IMO, would it work here?

[lokokung]

That would work, yes, but that is harder to maintain atm since ensuring that we include the default values in those cases is hard. The change will ensure that even if we forget to include the default value, that we will use undefined.

I can also update the existing ones to add the default, but I think that doing it programmatically will be more future-proof.

[kainino0x]

SG, one comment then.

[kainino0x]

Also it would be nice to remove the default: undefined lines that aren't needed anymore.

[kainino0x]

LGTM!