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This is a reland of 29499d24

Updated browser test to run in web_app_info mode. Other browser tests
were updated right before the original change landed, so this is the
only test that started failing to compile.

Original change's description:
> Convert scanning app to system web app (SWA)
>
> The SWA uses a temporary icon and is hidden behind a feature flag that
> is disabled by default.
>
> Bug: 1059779
> Change-Id: I9cee9b2de42a49285a8ee5ba2877d6394a7ca5b2
> Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2348539
> Commit-Queue: Jesse Schettler <jschettler@chromium.org>
> Reviewed-by: Jimmy Gong <jimmyxgong@chromium.org>
> Reviewed-by: Giovanni Ortuño Urquidi <ortuno@chromium.org>
> Reviewed-by: Kyle Horimoto <khorimoto@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#798367}

TBR=jimmyxgong@chromium.org,khorimoto@chromium.org,ortuno@chromium.org

Bug: 1059779
Change-Id: Iaef801d9a30fea6ed68342c81f28d917f77dc297
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2358689Reviewed-by: Jesse Schettler <jschettler@chromium.org>
Commit-Queue: Jesse Schettler <jschettler@chromium.org>
Cr-Commit-Position: refs/heads/master@{#798423}