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This reverts commit 74dbe648.

Reason for revert: suspected of making TabSearchAppTest.All flaky
see crbug.com/1148009

Original change's description:
> Tab Search: Infinite list component
>
> A list component that renders DOM items on demand based on the viewable
> scroll area and user navigation and scrolling interactions. Provides a
> performance gain for use cases where users have several dozens of items
> that should be available while scrolling the list by deferring scripting
> and rendering costs until necessary to fill the current scroll view.
>
> Bug: 1099917
> Change-Id: Ib22c0edf5ebc5febe3d8d6d4f7d8ac319e9bd0a2
> Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2503401
> Commit-Queue: Roman Arora <romanarora@google.com>
> Reviewed-by: Thomas Lukaszewicz <tluk@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#826287}

TBR=tluk@chromium.org,romanarora@chromium.org,romanarora@google.com

Change-Id: I5bb4c3d348ad739d2d503522dc84d8654c21f117
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Bug: 1099917
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2532987Reviewed-by: Evan Stade <estade@chromium.org>
Commit-Queue: Evan Stade <estade@chromium.org>
Cr-Commit-Position: refs/heads/master@{#826439}