GitLab

Adds support for up/down arrows in the iOS omnibox. Allows highlighting
suggestions from the list and choosing them with Enter.

Bug: 267089
Cq-Include-Trybots: master.tryserver.chromium.mac:ios-simulator-cronet;master.tryserver.chromium.mac:ios-simulator-full-configs
Change-Id: Iedf4ad116b9033fcc2cfbab7bc69a9868db0fc1d
Reviewed-on: https://chromium-review.googlesource.com/951487Reviewed-by: Gauthier Ambard <gambard@chromium.org>
Reviewed-by: Justin Cohen <justincohen@chromium.org>
Reviewed-by: Mark Cogan <marq@chromium.org>
Commit-Queue: Mark Cogan <marq@chromium.org>
Cr-Commit-Position: refs/heads/master@{#543094}