[Blink] Propagate lang attribute changes to child elements #49297
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It is not possible for elements to know if the lang attribute has
changed for one of its ancestors. This change propagates lang attribute
updates down the tree.
The Permission Element listens to this change and updates the text
accordingly.
Bug: 374677445
Change-Id: Ic41c90a13f3fbb1faecc8298993bc74cb185137e
Reviewed-on: https://chromium-review.googlesource.com/6003767
WPT-Export-Revision: 3e22200e8e534a14ca43b1de321e02d622deadfa