Tim Ledbetter 163b8a69e3 LibWeb: Assert that nodes share shadow-including root in BP calculation ...

Previously, it was assumed that nodes must share the same root, prior
to the calculation of their relative boundary point positions. This is
no longer the case, since `Selection.setBaseAndExtent()` now accepts
anchor and focus nodes that may be in different shadow trees.

2024-12-03 15:31:41 +01:00

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