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This reverts commit 2e452bbf.

Reason for revert: https://crbug.com/1000251 is fixed. 

Original change's description:
> [Sheriff] Disable BookmarkBarInvisibleOnShutdown on Linux
> 
> TBR=weidongg@chromium.org
> 
> Bug: 1000251
> Change-Id: I8e3372766ab9e560c9f47f7c2f8292ebc8af644c
> Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1782637
> Reviewed-by: Jan Wilken Dörrie <jdoerrie@chromium.org>
> Commit-Queue: Jan Wilken Dörrie <jdoerrie@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#692666}

TBR=jdoerrie@chromium.org,weidongg@chromium.org

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

Bug: 1000251
Change-Id: Id9af5a221f5ca04873ce30737c2a9be58afd9fb3
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1844854Reviewed-by: kylechar <kylechar@chromium.org>
Reviewed-by: Jan Wilken Dörrie <jdoerrie@chromium.org>
Commit-Queue: kylechar <kylechar@chromium.org>
Cr-Commit-Position: refs/heads/master@{#703303}