device/fido/mac: add browsing data deletion interface

This adds the DeleteWebAuthnCredentials method which deletes WebAuthn
credentials that have been created under a given browser profile and in
a given time interval.

Bug: 678128
Change-Id: I7f7b54b099c8d5cd622c70d16a510cf16f8948e6
Reviewed-on: https://chromium-review.googlesource.com/1123627
Commit-Queue: Martin Kreichgauer <martinkr@google.com>
Reviewed-by: Robert Sesek <rsesek@chromium.org>
Reviewed-by: Jan Wilken Dörrie <jdoerrie@chromium.org>
Cr-Commit-Position: refs/heads/master@{#573431}
8 files changed