style: Three-value position syntax uses calc() as its computed value representation.

This restores the previous behavior of using calc().

Note that background-position / object-position, which test this, weren't
hitting the assertion because they use another codepath.

I didn't add more extensive tests for this because it's well tested for those
two properties, and because this is legacy anyway, see the comment in the test.

I did add the assertion to the codepath those two properties hit.

Differential Revision: https://phabricator.services.mozilla.com/D16176

0 files changed, 0 insertions, 0 deletions