[omnibox] Reverse answer content & description, with styling

This CL changes the way answers reverse content and description
fields (the position/layout approach was incomplete). Font sizes
and colors are also applied to answers according to redline spec.

Bug: 855783
Change-Id: I39d619bbb729d2637f08d9c37fdfd5fb4938361a
Reviewed-on: https://chromium-review.googlesource.com/1137341
Reviewed-by: Justin Donnelly <jdonnelly@chromium.org>
Commit-Queue: Justin Donnelly <jdonnelly@chromium.org>
Cr-Commit-Position: refs/heads/master@{#575510}
8 files changed