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This is a reland of 022c5b0e.
Consumers of WebEngine have been prepared for a soft transition, and
runners_integration_tests.test-cmx is now updated.

Original change's description:
> [fuchsia] Migrate to fuchsia.net.interfaces/State
>
> Fixed: fuchsia:21155
> Change-Id: I85b388be33d4c9697ba866cf11a143493b2b3239
> Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2380329
> Reviewed-by: Robert Sesek <rsesek@chromium.org>
> Reviewed-by: Adam Langley <agl@chromium.org>
> Reviewed-by: Sergey Volk <servolk@chromium.org>
> Reviewed-by: Wez <wez@chromium.org>
> Commit-Queue: Marina Ciocea <marinaciocea@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#828229}

TBR=servolk@chromium.org

Change-Id: I7c63e2ab88ce8b087411de97bc4ee2eceebc7c3a
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2554857
Commit-Queue: Marina Ciocea <marinaciocea@chromium.org>
Reviewed-by: David Dorwin <ddorwin@chromium.org>
Reviewed-by: Robert Sesek <rsesek@chromium.org>
Reviewed-by: Wez <wez@chromium.org>
Reviewed-by: Marina Ciocea <marinaciocea@chromium.org>
Reviewed-by: Adam Langley <agl@chromium.org>
Cr-Commit-Position: refs/heads/master@{#833397}