GitLab

Moves ownership of the NTP coordinator from the NTP tab helper to the BVC.

Bug: 826369
Cq-Include-Trybots: luci.chromium.try:ios-simulator-cronet;luci.chromium.try:ios-simulator-full-configs
Change-Id: I470d344778f844145bbd4a615f3753b3980f1614
Reviewed-on: https://chromium-review.googlesource.com/c/1287321Reviewed-by: Mark Cogan <marq@chromium.org>
Reviewed-by: Kurt Horimoto <kkhorimoto@chromium.org>
Commit-Queue: Justin Cohen <justincohen@chromium.org>
Cr-Commit-Position: refs/heads/master@{#601602}