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This CL does not cover generation of suggestions, but rather rendering
of suggestions that exist in the UI model. Suggestions are also not yet
properly rendered WRT to alignment, sizing, etc. Proper formatting and
layout can be added after supporting capabilities are added to the UI.

BUG=777542

Change-Id: Ib10b7a1bf05be629322a3db81650324102e2fbfa
Reviewed-on: https://chromium-review.googlesource.com/734222Reviewed-by: Justin Donnelly <jdonnelly@chromium.org>
Reviewed-by: Ian Vollick <vollick@chromium.org>
Commit-Queue: Christopher Grant <cjgrant@chromium.org>
Cr-Commit-Position: refs/heads/master@{#512865}