[TTS] Update URL sending to use Unity URL helper.

Updates the logic in Contextual Search that determines whether to send a
URL to our servers as part of the Resolve request.  Now instead of
checking the sync service we use the Unity helper -- the Unified
Consent UrlKeyedDataCollectionConsentHelper.

BUG=825428

Change-Id: I6d294260018fc77d1eef896d75ea3b664cfba6d0
Reviewed-on: https://chromium-review.googlesource.com/1117705
Commit-Queue: Donn Denman <donnd@chromium.org>
Reviewed-by: Theresa <twellington@chromium.org>
Reviewed-by: Mihai Sardarescu <msarda@chromium.org>
Cr-Commit-Position: refs/heads/master@{#576215}
2 files changed