We need to reanchor our MV2 deprecation impact checker override. Let's take this opportunity to override it via the supplied `kExtensionManifestV2ExceptionListParam` feature param, to align closer with upstream expectations. Since it's tough to set a feature param to a dynamically computed string, we simply override its use and tack the Brave extensions on to the end of the computed list. Chromium changes: https://chromium.googlesource.com/chromium/src/+/5a8164b4d1bf0ff26deddb937644573572abfca1 commit 5a8164b4d1bf0ff26deddb937644573572abfca1 Author: Victor Hugo Vianna Silva <victorvianna@google.com> Date: Tue Jan 13 07:50:35 2026 -0800 Migrate base::Contains() to std::ranges::contains() in chrome base::Contains() is an alias to std::ranges::contains() since crrev.com/c/7415207, so this CL has no behavior change. Bug: 470391351 Change-Id: I54167f0b41faa77ff6d965f626506724c7384e33 Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/7456066 Commit-Queue: Victor Vianna <victorvianna@google.com> Reviewed-by: Boris Sazonov <bsazonov@chromium.org> Cr-Commit-Position: refs/heads/main@{#1568407}