[signin][mice] Update credentials when Chrome-Connected header has email

Bug: 938554
Change-Id: Iffcefb818c8400ae482442e3e7240d58a79db75d
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1517701
Commit-Queue: David Roger <droger@chromium.org>
Reviewed-by: Boris Sazonov <bsazonov@chromium.org>
Cr-Commit-Position: refs/heads/master@{#640347}
4 files changed