GitLab

Update expiry of PageLoad.HeavyAds.ComputedTypeWithThresholdNoise and
PageLoad.HeavyAds.InterventionType as they are still used to measure
impact of heavy ad intervention.

PageLoad.HeavyAds.ComputedType2 is no longer needed and is obsoleted.

Bug: 1160766,1160767,1160768
Change-Id: I5bdc902b7fee7915741d80110dc64c3c2ecde933
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2638104Reviewed-by: Josh Karlin <jkarlin@chromium.org>
Reviewed-by: Ilya Sherman <isherman@chromium.org>
Commit-Queue: John Delaney <johnidel@chromium.org>
Cr-Commit-Position: refs/heads/master@{#845269}