GitLab

This reverts commit 5f47f6e7.

Reason for revert: Reverting some CLs that are suspect for causing
flakiness in the tests

Original change's description:
> [Sync] Support FCM Invalidations in Sync browser tests
> 
> Change-Id: I43de31210a0e52a39f2b0017e08994ccf1207714
> Bug: 985287
> Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1745997
> Commit-Queue: Mohamed Amir Yosef <mamir@chromium.org>
> Reviewed-by: Marc Treib <treib@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#689571}

TBR=treib@chromium.org,mamir@chromium.org

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

Bug: 985287
Change-Id: Idacca73b390e5fe88fa5a658991c5e3f9c611cab
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1774924Reviewed-by: Mohamed Amir Yosef <mamir@chromium.org>
Commit-Queue: Mohamed Amir Yosef <mamir@chromium.org>
Cr-Commit-Position: refs/heads/master@{#691572}