style: Track the visited-handling-mode on the MatchingContext.

Instead of on the stack.

This fixes bugs where we're not passing the value around correctly, like from
::-moz-any.

This is a fix for https://bugzilla.mozilla.org/show_bug.cgi?id=1431539.

components/layout_thread/dom_wrapper.rs

@@ -713,7 +713,6 @@ impl<'le> ::selectors::Element for ServoLayoutElement<'le> {
         &self,
         pseudo_class: &NonTSPseudoClass,
         _: &mut MatchingContext<Self::Impl>,
-        _: VisitedHandlingMode,
         _: &mut F,
     ) -> bool
     where
@@ -1221,7 +1220,6 @@ impl<'le> ::selectors::Element for ServoThreadSafeLayoutElement<'le> {
         &self,
         _: &NonTSPseudoClass,
         _: &mut MatchingContext<Self::Impl>,
-        _: VisitedHandlingMode,
         _: &mut F,
     ) -> bool
     where