Callum Law dae2f4df0d LibWeb: Clear rule caches before setting parent rule/stylesheet ...

In a later commit the caches to clear will be stored against a document
so the rule will require still having reference to that document to
clear it.

Also take this opportunity to mark `set_parent_style_sheet` as
`MUST_UPCALL`

2026-03-20 16:08:32 -05:00

2.5 KiB

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