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We're still using all metrics for the local search service and auto
screen brightness, which are nearing expiry. This extends them all
to 2021-06-30.

Bug: 1139968, 1139969, 1139970, 1139971, 1139972, 1139973, 1139974, 1139975, 1139976, 1139977, 1139978, 1139979, 1139980, 1139981, 1139991
Change-Id: Iae29437854b38d99e450c48ea6b8f8d783c58d28
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2485994Reviewed-by: Jia Meng <jiameng@chromium.org>
Commit-Queue: Tony Yeoman <tby@chromium.org>
Cr-Commit-Position: refs/heads/master@{#818709}