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Updates the expires_after attribute for 176 histograms that show
frequent access in the past 90 days.  These are the 80% most
frequently used histograms over that time that do not already have a date later
than or within 60 days of 2020-06-28.

Change-Id: I5d6f7e168319cfc3e1a2822f7371cc807b916271
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1981500
Commit-Queue: Brian White <bcwhite@chromium.org>
Reviewed-by: Brian White <bcwhite@chromium.org>
Cr-Commit-Position: refs/heads/master@{#727925}