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This reverts commit 66d17ca7.

Reason for revert: This test fails in official builds:
https://uberchromegw.corp.google.com/i/official.desktop.continuous/builders/win%20trunk/builds/86110

Original change's description:
> Make the ThirdPartyModulesBlocking feature work on all Windows versions
> 
> Change-Id: I0118d26fe9b7f11f2608dd66c10418e210393733
> Reviewed-on: https://chromium-review.googlesource.com/1083842
> Commit-Queue: Patrick Monette <pmonette@chromium.org>
> Reviewed-by: Greg Thompson <grt@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#566516}

TBR=pmonette@chromium.org,grt@chromium.org

# Not skipping CQ checks because original CL landed > 1 day ago.

Change-Id: Ide1a33af76247dd31b82aa3d49916fe2ec1859a4
Reviewed-on: https://chromium-review.googlesource.com/1099698Reviewed-by: Reid Kleckner <rnk@chromium.org>
Commit-Queue: Reid Kleckner <rnk@chromium.org>
Cr-Commit-Position: refs/heads/master@{#566996}