[client hints] Apply Feature Policy on 3rd party iframe navigations #19464
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Feature Policy control over Client Hints in 3rd party contexts
currently only works (behind a flag) for subresources.
This CL applies that control also over 3rd party iframe
navigation requests. On top of that, in order to make this testable
with WPTs, this CL also adds a ContentShell persistency layer for
Client Hints.
Bug: 989898
Binary-Size: Virtual ForTesting method
Change-Id: I17ce2af93c9b2f9a3f10972b6b4e0ed8161f9381
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1728577
Reviewed-by: Jochen Eisinger <jochen@chromium.org>
Reviewed-by: Mike West <mkwst@chromium.org>
Reviewed-by: Colin Blundell <blundell@chromium.org>
Reviewed-by: Arthur Sonzogni <arthursonzogni@chromium.org>
Reviewed-by: Peter Kasting <pkasting@chromium.org>
Reviewed-by: Andrey Kosyakov <caseq@chromium.org>
Reviewed-by: Tarun Bansal <tbansal@chromium.org>
Commit-Queue: Yoav Weiss <yoavweiss@chromium.org>
Cr-Commit-Position: refs/heads/master@{#713469}