GitLab

* For DlpRulesManager the variables are replaced by
base::MakeFixedFlatMap
* For DlpContentManager the variable is replaced by std::array

Bug: 1151356
Change-Id: Ibd38634040743e78178932c4bb368f99af22be72
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2550832Reviewed-by: Aya Elsayed <ayaelattar@chromium.org>
Reviewed-by: Sergey Poromov <poromov@chromium.org>
Commit-Queue: Nikita Podguzov <nikitapodguzov@chromium.org>
Cr-Commit-Position: refs/heads/master@{#830163}