[Mac] Add Text Suggestions Touch Bar to Experimental UI

Enabling the experimental UI flag, chrome://flags#upcoming-ui-features,
will now enable the text suggestions touch bar.

Bug: 717553
Change-Id: Ib78dc1298d548bd3548441667ab4f46e62f3b98a
Reviewed-on: https://chromium-review.googlesource.com/1167800
Commit-Queue: Tessa Nijssen <tnijssen@google.com>
Commit-Queue: Avi Drissman <avi@chromium.org>
Reviewed-by: Avi Drissman <avi@chromium.org>
Reviewed-by: Sarah Chan <spqchan@chromium.org>
Cr-Commit-Position: refs/heads/master@{#581685}
1 file changed