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This reverts commit 57e175db.

Reason for revert: Seems to break presubmit due to missing OWNERS file

Original change's description:
> Remove HoldingSpacePresenter.
> 
> No longer needed given evolution of feature requirements.
> 
> Bug: 1112469
> Change-Id: Ic31d2a02fcc624ddc101447f68089cfff9bd2660
> Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2377535
> Reviewed-by: Toni Baržić <tbarzic@chromium.org>
> Commit-Queue: David Black <dmblack@google.com>
> Cr-Commit-Position: refs/heads/master@{#801857}

TBR=tbarzic@chromium.org,dmblack@google.com

Change-Id: I6c7b1254e9af0ae662b8afc7d37db50dff5c312d
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Bug: 1112469
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2377654Reviewed-by: David Black <dmblack@google.com>
Commit-Queue: David Black <dmblack@google.com>
Cr-Commit-Position: refs/heads/master@{#801885}