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This is a reland of 6ea86d08

The issue was the network condition checks which are now override by
a switch for these tests (see cl/2284978).

Original change's description:
> [LiteVideo] Do not attempt LiteVideos on Reloads/Forward-Back.
>
> This change prevents LiteVideos from being attempted when the
> navigation is a reload or forward-back page transition. It also
> adds an entry for host of the navigation to the user blocklist to
> allow users to soft opt-out of the optimization if they reload
> frequently on a host.
>
> A future change will clear the blocklist when the browser history
> is wiped.
>
> Bug: 1096796
> Change-Id: I687d4c9cd0844d7475f6a3baedacebcf73a48845
> Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2276681
> Commit-Queue: Michael Crouse <mcrouse@chromium.org>
> Commit-Queue: Tarun Bansal <tbansal@chromium.org>
> Auto-Submit: Michael Crouse <mcrouse@chromium.org>
> Reviewed-by: Tarun Bansal <tbansal@chromium.org>
> Reviewed-by: Sophie Chang <sophiechang@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#786127}

TBR=tbansal@chromium.org

Bug: 1096796
Change-Id: I5164e510bfb06fc97e45ab9c82c482dc25529e1d
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2287380Reviewed-by: Michael Crouse <mcrouse@chromium.org>
Commit-Queue: Michael Crouse <mcrouse@chromium.org>
Cr-Commit-Position: refs/heads/master@{#786432}