GitLab

This is a reland of ea06ab2f.

Original CL:
> Showing the uninstall survey is a brand-specific behavior. This CL
> introduces a new setup/brand_behaviors.h file that declares various
> operations that vary by brand. DoPostUninstallOperations and
> GetDistributionData (its helper function) both reside in brand-specific
> implementation files that are selected at build time.
>
> This also allowed moving the uninstall metrics code from installer/util
> into installer/setup where it really belongs.
>
> I have also taken the liberty to gently modernize some of the moved
> code.
>
> BUG=879568
>
> Change-Id: I25d9c205d46ffb14454193fcc28ae5803502bf29
> Reviewed-on: https://chromium-review.googlesource.com/1200862
> Reviewed-by: Robert Sesek <rsesek@chromium.org>
> Reviewed-by: Brian White <bcwhite@chromium.org>
> Reviewed-by: Samuel Huang <huangs@chromium.org>
> Commit-Queue: Greg Thompson <grt@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#588537}
> (cherry picked from commit ea06ab2f)

BUG=879568
TBR=rsesek@chromium.org,bcwhite@chromium.org,huangs@chromium.org

Change-Id: I089f50e1a24d447936bb034bddc9cba5ee0afa7f
Reviewed-on: https://chromium-review.googlesource.com/1206431
Commit-Queue: Greg Thompson <grt@chromium.org>
Reviewed-by: Greg Thompson <grt@chromium.org>
Cr-Commit-Position: refs/heads/master@{#588817}