[iOS] Add the Youtube Incognito toast

This CL adds the toast to learn more about the incognito when the
youtube incognito sheet was presented in the past.

Bug: 374935531
Change-Id: I58a257027fb2bb8e442d53631d04bc0a40c13b5c
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/6157805
Reviewed-by: Sylvain Defresne <sdefresne@chromium.org>
Commit-Queue: Elmehdi Rahmaoui <erahmaoui@google.com>
Cr-Commit-Position: refs/heads/main@{#1405988}
NOKEYCHECK=True
GitOrigin-RevId: cd44952c9ecf9b161f76c17c818f8a1045119f44
2 files changed
tree: 248d87bd0082dbc037d0c76a9245fd107d4332a3
  1. build/
  2. chrome/
  3. components/
  4. google_internal/
  5. intents/
  6. net/
  7. public/
  8. testing/
  9. third_party/
  10. tools/
  11. web/
  12. web_view/
  13. .swift-format
  14. BUILD.gn
  15. COMMON_METADATA
  16. DEPS
  17. DIR_METADATA
  18. features.gni
  19. OWNERS
  20. PRESUBMIT.py
  21. PRESUBMIT_test.py
  22. README.md
README.md

This directory holds code related to Chrome for iOS. See this document for a description of the structure underneath this directory.