GitLab

This is recorded in addition to the histogram so that we can use the user action sequencing dashboard to see what users do on the chrome://extensions page, and use the histogram to see which messaging is most effective.

Design Doc: http://go/extensionscheckupmetrics

Bug: 1034541
Change-Id: I490eeec2a666e7fac094f7ac0872540c50c0dc8d
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2031534Reviewed-by: Moe Ahmadi <mahmadi@chromium.org>
Reviewed-by: Devlin <rdevlin.cronin@chromium.org>
Reviewed-by: Ilya Sherman <isherman@chromium.org>
Commit-Queue: Archana Simha <archanasimha@chromium.org>
Cr-Commit-Position: refs/heads/master@{#739093}