GitLab

Moves AppNavigation protocol implementation to SceneController.

Bug: none
Change-Id: I41732781203fae618ce5b5651a1f3be47576a816
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2002521Reviewed-by: Mark Cogan <marq@chromium.org>
Commit-Queue: Stepan Khapugin <stkhapugin@chromium.org>
Cr-Commit-Position: refs/heads/master@{#732858}