The spec says out-of-range values should not be rejected during parsing. Instead, they should be clamped during computing. Per discussion with emilio, we may want to put the minimum number into struct Number and force properties to call a specific method when computing, so that we remember to clamp them when needed.

This is probably another good one for nox.

Pushed by ecoal95@gmail.com: https://hg.mozilla.org/integration/autoland/rev/ed31f3ce742d Update test expectations. r=emilio