[Chrome Autofill] Reset |should_request_name_from_user_| on consecutive save offers

Bug: 848955
Change-Id: I685ff122d8ab0a8b8a529e7d381442e7ac5d9838
Reviewed-on: https://chromium-review.googlesource.com/1140679
Commit-Queue: Jared Saul <jsaul@google.com>
Commit-Queue: Sebastien Seguin-Gagnon <sebsg@chromium.org>
Reviewed-by: Sebastien Seguin-Gagnon <sebsg@chromium.org>
Cr-Commit-Position: refs/heads/master@{#575734}
3 files changed