[TabStripCollection] Integrate collection related changes to contents data.

Bug: b/346418430
Change-Id: I62fd6af3f004c3b3af1fbf8620388c8a19196c63
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/5617593


Reviewed-by: Eshwar Stalin <estalin@chromium.org>
Commit-Queue: Shibalik Mohapatra <shibalik@chromium.org>
Code-Coverage: findit-for-me@appspot.gserviceaccount.com <findit-for-me@appspot.gserviceaccount.com>
Cr-Commit-Position: refs/heads/main@{#1313136}