[iOS] Fixes tab group ghost stroke

Sets the group cell as collapsed when dragged to reduce the stroke of
the ghost cell.

Demo:
https://drive.google.com/file/d/1oMoD41pb884LQQpiOTwyTR8aZ9bLHAxd/view?usp=drive_link&resourcekey=0-vrrTGtdmloIRqn29wI8WHA

Bug: 394790544
Change-Id: I4bd0c85084e0519d121dd629eae7b53377d1c944
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/6239933
Commit-Queue: Ewann Pellé <ewannpv@chromium.org>
Reviewed-by: Quentin Pubert <qpubert@google.com>
Cr-Commit-Position: refs/heads/main@{#1416744}
NOKEYCHECK=True
GitOrigin-RevId: a0a727a7e83bd7037ad66f720870dec887b37c0a
1 file changed
tree: 9e73727fc1026d8b3928fb3b234f443be69244bd
  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.