Restyle hints for visited

Extend restyle hints to check additional cases for visited.

If we are sensitive to visitedness and the visited state changed, we force a
restyle here.  Matching doesn't depend on the actual visited state at all, so we
can't look at matching results to decide what to do for this case.

This also updates the snapshot version of `match_non_ts_pseudo_class` to check
the relevant link instead of the element state, just like we do when matching
with regular Gecko elements.

There's also a separate case of a visited-dependent selector when other state or
attributes change.  For this, we need to cover both types of matching we use
when cascading values.  If there is a relevant link, then we also matched in
visited mode.  Match again in this mode to ensure this also matches.  Note that
we never actually match directly against the element's true visited state at
all, since that would expose us to timing attacks.  The matching process only
considers the relevant link state and visited handling mode when deciding if
visited matches.

MozReview-Commit-ID: CVGquetQ2VW

0 files changed, 0 insertions, 0 deletions