[Messaging] Rename DIRTY_TAB_GROUP_REMOVED to TOMBSTONED

This CL renames the PersistentNotificationType::DIRTY_TAB_GROUP_REMOVED
to PersistentNotificationType::TOMBSTONED. The corresponding DirtyType
was renamed to kTombstoned. TOMBSTONED will be used for all kinds of
removed entities which is currently removed tabs and tab groups.
The front-end will need to query for tombstoned entries via
`GetMessages` and subsequently filter by CollaborationEvent type to find
the appropriate messages.

Bug: 395074987
Change-Id: Ibf6fcd37b2b7ec9e7428cdde69d7e677ba3c403c
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/6242146
Reviewed-by: Louis Romero <lpromero@google.com>
Reviewed-by: Calder Kitagawa <ckitagawa@chromium.org>
Reviewed-by: Yuheng Huang <yuhengh@chromium.org>
Commit-Queue: Shakti Sahu <shaktisahu@chromium.org>
Cr-Commit-Position: refs/heads/main@{#1417367}
NOKEYCHECK=True
GitOrigin-RevId: ff4ae2fdbfc27a3b224bd79f422c3e4b1bcf1cbd
2 files changed
tree: 87a3b051cce9bdcd8b860cbbdbad894db95fc593
  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.