GitLab

Due to not completed investigation about Nigori's not migrated to
keystore following histograms were extended until 2020-02-01:

Sync.EncryptEverythingWhenCryptographerNotReady
Sync.ShouldTriggerMigrationAfterMigration
Sync.IsNigoriMigratedAfterMigration
Sync.NigoriMigrationTrigger
Sync.NigoriMigrationAttemptedBeforeNotMigrated
Sync.NigoriMigrationReason

Bug: 944831, 995518, 995517, 995510, 995487
Change-Id: I89e834d31a1d41b37f1f070f537d15ae73ee0f18
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1829351
Auto-Submit: Maksim Moskvitin <mmoskvitin@google.com>
Reviewed-by: Mikel Astiz <mastiz@chromium.org>
Reviewed-by: Steven Holte <holte@chromium.org>
Commit-Queue: Steven Holte <holte@chromium.org>
Cr-Commit-Position: refs/heads/master@{#702676}