Chromium changes: https://chromium.googlesource.com/chromium/src/+/2d803238f4a71a73decc73a5ec682070f1401750 commit 2d803238f4a71a73decc73a5ec682070f1401750 Author: Calder Kitagawa <ckitagawa@chromium.org> Date: Tue Apr 28 18:00:59 2026 -0700 [IA] Move optional button to LocationBar - Create an OptionalButtonCoordinator in LocationBarCoordinator for phones only. - Add logic to show/hide new optional button dynamically. - Update ToolbarPhone to proxy calls into LocationBar except on the NTP. On the NTP the identity disk is still presented in the optional button. Will refactor post-launch. Bug: 491511644 Change-Id: I81a485c1fa93420c661984523cb0367f737d87be Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/7793280 Reviewed-by: Shakti Sahu <shaktisahu@chromium.org> Commit-Queue: Calder Kitagawa <ckitagawa@chromium.org> Reviewed-by: Sky Malice <skym@chromium.org> Cr-Commit-Position: refs/heads/main@{#1622145}