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This change extends several Password Manager histograms.

R=chromium-metrics-reviews@google.com

Fixed: 1165113
Change-Id: If442fb40bd477aa860a658441c7c433b6d156a6f
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2636154
Commit-Queue: Mark Pearson <mpearson@chromium.org>
Reviewed-by: Mark Pearson <mpearson@chromium.org>
Reviewed-by: Michael Lippautz <mlippautz@chromium.org>
Auto-Submit: Jan Wilken Dörrie <jdoerrie@chromium.org>
Cr-Commit-Position: refs/heads/master@{#844819}