Josh Matthews c1bddb3801 script: Use snapshot of navigation target when navigating. (#43807) ...

This set of changes introduces a type matching the spec's "target
snapshot params" and uses it as part of determining the origin of new
documents. This has a side benefit of making our sandbox flag
determination more accurate, which leads to a bunch of sandboxing tests
passing as well as some new failures due to spec confusion about
origins.

Testing: Many new passing tests.
Part of the long road to #43149

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Signed-off-by: Josh Matthews <josh@joshmatthews.net>

2026-04-01 04:45:12 +00:00

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