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This test verifies that the candidate SiteInstance is not used for a
cross origin redirect, that would lead to have a SiteInstance hosting
a crossOriginIsolated page with an incorrect top level origin as
initially registered.

Bug: 1107814
Change-Id: If52fef13528ca8d2f8dcf8af04b6510462072f43
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2396379
Commit-Queue: Arthur Hemery <ahemery@chromium.org>
Reviewed-by: Arthur Sonzogni <arthursonzogni@chromium.org>
Cr-Commit-Position: refs/heads/master@{#804894}