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These histograms have nothing to do with components/sync, they were
mistakenly added to the sync histograms file.

Bug: None
Change-Id: I5d22799a2a4c20534db04de3ff8531cef781a38e
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2590036
Auto-Submit: Victor Vianna <victorvianna@google.com>
Commit-Queue: Robert Kaplow <rkaplow@chromium.org>
Reviewed-by: Robert Kaplow <rkaplow@chromium.org>
Cr-Commit-Position: refs/heads/master@{#837107}