[ios] add presaving calls to password generation

Bug: 886583
Change-Id: I28e56d75def275ec05b5425be85282d1f11fffe2
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1480458
Commit-Queue: David Jean <djean@chromium.org>
Reviewed-by: Vadym Doroshenko <dvadym@chromium.org>
Cr-Commit-Position: refs/heads/master@{#637647}
4 files changed