GitLab

This reverts commit 3132a551.

Reason for revert:

Findit (https://goo.gl/kROfz5) identified CL at revision 838729 as the
culprit for flakes in the build cycles as shown on:
https://analysis.chromium.org/p/chromium/flake-portal/analysis/culprit?key=ag9zfmZpbmRpdC1mb3ItbWVyQwsSDEZsYWtlQ3VscHJpdCIxY2hyb21pdW0vMzEzMmE1NTFiZTUzNGNiMTJlZTlkYzA1ZjdkOWRlYzZlMDMzZmIzMQw

Sample Failed Build: https://ci.chromium.org/b/8860248290928956432

Sample Failed Step: bf_cache_browser_tests

Sample Flaky Test: OptimizationGuideKeyedServiceBrowserTest.CheckForBlocklistFilter

Original change's description:
> Fix sequence checker dcheck assumptions for optimization guide filters
> 
> The bloom filter and optimization filter can get destructed on
> background thread when a new component comes in after initial load
> 
> Bug: 1160660
> Change-Id: Ia1dd5925d7513391148b677fb3e75b818a9fa190
> Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2600040
> Reviewed-by: Michael Crouse <mcrouse@chromium.org>
> Commit-Queue: Sophie Chang <sophiechang@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#838729}


Change-Id: If61e0c71d69fd4d7ef865229c986bd890ea66527
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Bug: 1160660
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2600537
Cr-Commit-Position: refs/heads/master@{#838781}