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This CL adds the SwitchToTab image and handling to the omnibox popup
row. It allows to switch easily to an opened tab based on omnibox
suggestions.

Bug: 893121
Cq-Include-Trybots: luci.chromium.try:ios-simulator-cronet;luci.chromium.try:ios-simulator-full-configs
Change-Id: Ib440267802c1210ea416066c679a2ff4e963fbb6
Reviewed-on: https://chromium-review.googlesource.com/c/1268344
Commit-Queue: Gauthier Ambard <gambard@chromium.org>
Reviewed-by: Eugene But <eugenebut@chromium.org>
Reviewed-by: Stepan Khapugin <stkhapugin@chromium.org>
Cr-Commit-Position: refs/heads/master@{#599155}