GitLab

Delay expiry of histograms causing alerts.

Updates the expires_after attribute for 32 histograms that have
been used to generate alerts in the past 90 days and do not already have
a date later than or within 60 days of 2020-12-20.

TBR=chromium-metrics-reviews@google.com

Change-Id: Idd7bda836d27f35b773cd0b7f6cdafbb0891513a
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2261053Reviewed-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@{#781421}