[css-flexbox] Using "preferred size" in initial layout, rather than max-content size

In Flexbox layout step 2.E (section 9.2), we do layout on the flex
items, treating "auto" as max-content.  I think we actually want to
treat it as "preferred size".  If you've got a multicol flex item with
a specified column size and count, you want to return the product of
those properties, not the max-content size of the multicol.

This has no effect on most things, since most layout modes don't have
a preferred size, so it defaults to max-content instead.

~TJ

Received on Wednesday, 27 August 2014 07:28:59 UTC