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This is a reland of 621bb15a

Original change's description:
> Switch webview bots to google devices.
> 
> Bug: 814405
> Change-Id: I217f731c39f9ad0576ce98236c7c7dc78cf71dd4
> Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1592874
> Commit-Queue: Andrew Luo <aluo@chromium.org>
> Reviewed-by: John Budorick <jbudorick@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#663371}

Bug: 814405
Change-Id: I94d5ea313108a0105a8658daae4f20c320beba9a
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1632901Reviewed-by: Ben Pastene <bpastene@chromium.org>
Commit-Queue: Andrew Luo <aluo@chromium.org>
Cr-Commit-Position: refs/heads/master@{#664612}