Add download IPH and row promos to list of referral methods

Bug: 328652037
Change-Id: I5c5f7bef2654c1bb0d0835cecadb8f7b2edeb189
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/5354014


Reviewed-by: Javier Castro <jacastro@chromium.org>
Commit-Queue: Awad Osman <awado@google.com>
Cr-Commit-Position: refs/heads/main@{#1270567}