[autofill] Pin preview font-family to a system font

(Merge to M74)

Bug: 916838
Change-Id: I4e874105262f2e15a11a7a18a7afd204e5827400
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1423109
Reviewed-by: Fabio Tirelo <ftirelo@chromium.org>
Reviewed-by: Koji Ishii <kojii@chromium.org>
Commit-Queue: Roger McFarlane <rogerm@chromium.org>
Cr-Original-Commit-Position: refs/heads/master@{#640884}(cherry picked from commit 0bd10e13a008389ec14bbe7cc95f17d82ea151c1)
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1544309
Reviewed-by: Roger McFarlane <rogerm@chromium.org>
Cr-Commit-Position: refs/branch-heads/3729@{#512}
Cr-Branched-From: d4a8972e30b604f090aeda5dfff68386ae656267-refs/heads/master@{#638880}
2 files changed