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This reverts commit 1a291df2.

Reason for revert: Some issues with Windows

Original change's description:
> Re-enable PredictionManager browser tests on Win/Mac/CrOS
>
> And fix init issue on ChromeOS for sign in profiles
>
> Change-Id: I26b87d58f2eae2afecf67685690312a8aed70c60
> Bug: 1146151
> Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2625157
> Reviewed-by: Michael Crouse <mcrouse@chromium.org>
> Commit-Queue: Sophie Chang <sophiechang@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#843176}

TBR=sophiechang@chromium.org,mcrouse@chromium.org,chromium-scoped@luci-project-accounts.iam.gserviceaccount.com

Change-Id: I4cb2f29850ebfe025ff9d3d016e2c1c31f4471de
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Bug: 1146151
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2626981Reviewed-by: Sophie Chang <sophiechang@chromium.org>
Commit-Queue: Sophie Chang <sophiechang@chromium.org>
Cr-Commit-Position: refs/heads/master@{#843259}