Revert "[Sync] Deprecate BookmarkData in SyncEntity and remove related code"

This reverts commit 4a0cf6516ff4f2a8249f479979b8f284c1eab1ee.

Reason for revert: this CL accidentally readded chrome/test/data/vr/* which was moved in https://chromium.googlesource.com/chromium/src/+/a9ced4c437fa8451fd9d2ca7e2c125242e0494d4

Original change's description:
> [Sync] Deprecate BookmarkData in SyncEntity and remove related code
> 
> Bug: 860643
> Change-Id: Ic472b0d4a182cb70fce2a035197897cdb9e609c2
> Reviewed-on: https://chromium-review.googlesource.com/1127791
> Commit-Queue: Mohamed Amir Yosef <mamir@chromium.org>
> Reviewed-by: Mikel Astiz <mastiz@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#575221}

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

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

Bug: 860643
Change-Id: Iba22f9fd1319bf1f3076332858562a3e92070a5b
Reviewed-on: https://chromium-review.googlesource.com/1141624
Reviewed-by: Mohamed Amir Yosef <mamir@chromium.org>
Reviewed-by: Mikel Astiz <mastiz@chromium.org>
Commit-Queue: Mohamed Amir Yosef <mamir@chromium.org>
Cr-Commit-Position: refs/heads/master@{#575980}
11 files changed