Hook up the Search Ready Omnibox feature

This patch does all of the plumbing to hook up and use the classes
for the Search Ready Omnibox. The EditUrlSuggestionCoordinator now
implements the SuggestionProcessor interface and has been named to
reflect that. The suggestion's view is now created on-demand as well.

Bug: 901952
Change-Id: I7da177e73df0b1ab4e92d498efbd511cf1f863ad
Reviewed-on: https://chromium-review.googlesource.com/c/1372720
Commit-Queue: Matthew Jones <mdjones@chromium.org>
Reviewed-by: Ted Choc <tedchoc@chromium.org>
Reviewed-by: Theresa <twellington@chromium.org>
Cr-Commit-Position: refs/heads/master@{#623779}
11 files changed