Aliaksandr Kalenik 4a140b740c LibWeb: Early return if document doesn't have navigable in container ...

...navigable shared attribute processing steps.

After e095bf3a5f
https://wpt.live/html/rendering/pixel-length-attributes.html ends up in
this function with null navigable, which leads to crash while executing
steps. Adding early return in case iframe's document doesn't have a
navigable is enough to make the test pass again.

This commit doesn't import the WPT test, because it's already imported
and we have it disabled since it takes too much time on CI.

2025-09-08 12:12:23 +02:00

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