Delay expiry of frequently used histograms.

Updates the expires_after attribute for 152 histograms that show
frequent access in the past 90 days.  These are the 94% most
frequently used histograms over that time that do not already
have a date later than or within 60 days of 2021-01-18.

TBR=chromium-metrics-reviews@google.com

Change-Id: I59bf7c95315cb6f8b39f1c63a72561ec06f07b59
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2488223


Reviewed-by: Chrome Metrics Logs <chrome-metrics-team+robot@google.com>
Commit-Queue: Chrome Metrics Logs <chrome-metrics-team+robot@google.com>
Cr-Commit-Position: refs/heads/master@{#819077}