Migrate GoogleUrlTracker to NetworkConnectionTracker

This migrates GoogleUrlTracker to use NetworkConnectionTracker instead
of NetworkChangeNotifier so it will work with the network service
enabled.

Bug: 868018
Cq-Include-Trybots: luci.chromium.try:ios-simulator-full-configs;master.tryserver.chromium.mac:ios-simulator-cronet
Change-Id: Ib8231dc6df2456ae6a0908b49e4626364158ba81
Reviewed-on: https://chromium-review.googlesource.com/1175486
Commit-Queue: Robbie McElrath <rmcelrath@chromium.org>
Reviewed-by: Reilly Grant <reillyg@chromium.org>
Reviewed-by: Eugene But <eugenebut@chromium.org>
Reviewed-by: Ilya Sherman <isherman@chromium.org>
Reviewed-by: Kristi Park <kristipark@chromium.org>
Cr-Commit-Position: refs/heads/master@{#584289}
9 files changed