[iOS] Unfocus the omnibox when going incognito on NTP

This CL makes sure that the NTP is unfocusing the omnibox when a
suggestion is opened in incognito. It allows to make sure that the
omnibox doesn't end up in a broken state.

Bug: 928237
Change-Id: I6bf12d4460108d5916bf33d35ea82a847f12eb8a
Reviewed-on: https://chromium-review.googlesource.com/c/1470234
Reviewed-by: Justin Cohen <justincohen@chromium.org>
Reviewed-by: Mark Cogan <marq@chromium.org>
Commit-Queue: Gauthier Ambard <gambard@chromium.org>
Cr-Commit-Position: refs/heads/master@{#632177}
2 files changed