GitLab

Refactors infinite feed triggering by moving the conditional logic in
the VC. Logs an action when user reached the bottom of the current feed,
requesting a new set of articles.

Bug: 1085419, 1122409
Change-Id: I99c734aaa5912e1d82e2330ec200593648fa8153
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2363219Reviewed-by: Sergio Collazos <sczs@chromium.org>
Commit-Queue: Adam Trudeau-Arcaro <adamta@google.com>
Cr-Commit-Position: refs/heads/master@{#803117}