Bug 1678465 [wpt PR 26579] - FontAccess: Chrome UI for a chooser, a=testonly

Bug 1678465 [wpt PR 26579] - FontAccess: Chrome UI for a chooser, a=testonly

Automatic update from web-platform-tests
FontAccess: Chrome UI for a chooser

This CL implements a Chrome UI that allows users to pick one or more
fonts, resulting from a request originating from a Blink API call.

This change implements a multi-select chooser that offers the option to
"import" fonts to sites as well as the ability to cancel. It is
implemented as a permission bubble initially.

Fixed: 1138621
Change-Id: I9f4a0bd7a990823d2de0c19372cbedc4e811d7d6
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2543603
Commit-Queue: Olivier Yiptong <oyiptong@chromium.org>
Reviewed-by: Joshua Bell <jsbell@chromium.org>
Reviewed-by: Avi Drissman <avi@chromium.org>
Cr-Commit-Position: refs/heads/master@{#829910}

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wpt-commits: 912ded06c4bf923d86167720fe683de554d75ada
wpt-pr: 26579