[css-background] Two more computed/animatable nits

Fantasai,

The computed value for border-top-left-radius et.al. has two values, so
the animatable line should say ‘as a simple list of length, percentage or
calc’.

And I had a question earlier [1, point 4] about whether computed values
should fill in optional values. There are a few properties in backgrounds
and borders with <something>{1,X} values where the computed value is 'as
specified'. The computed value of the border-top-left-radius property
actually fills in the implicit value if only one is specified - should
they all?

background-size
border-image-slice
border-image-width

border-image-outset

border-image-repeat


Thanks,

Alan