:host::part() should only match with part and rule in the same tree
Bug: 432289354
Change-Id: I2ec026f2d9718a0c021aaef6ad7aa1c7d27cc946
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/6780977
Reviewed-by: Daniil Sakhapov <sakhapov@chromium.org>
Commit-Queue: Rune Lillesveen <futhark@chromium.org>
Cr-Commit-Position: refs/heads/main@{#1491938}
