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Having these histograms is an important reminder that, on many platforms,
these things take on the order of hundreds of milliseconds shortly after
startup, likely making slow slower as a user is trying to interact with
it.

Bug: 871495
Change-Id: Iab792bb11446a8258865562937b8f8b9b81fe4a1
Reviewed-on: https://chromium-review.googlesource.com/1170132
Commit-Queue: Mark Pearson <mpearson@chromium.org>
Reviewed-by: Ilya Sherman <isherman@chromium.org>
Reviewed-by: Siddhartha S <ssid@chromium.org>
Cr-Commit-Position: refs/heads/master@{#582314}