Network details: nameservers: stop learn more propagation

TBR=stevenjb@chromium.org

(cherry picked from commit 35328cc5ac8aafaefff8a50077074374ff5a77a0)

Bug: 810328
Change-Id: I511732bfc5429c58477b09a33fb8d83f3ba10539
Reviewed-on: https://chromium-review.googlesource.com/914925
Reviewed-by: Toni Barzic <tbarzic@chromium.org>
Commit-Queue: Steven Bennetts <stevenjb@chromium.org>
Cr-Original-Commit-Position: refs/heads/master@{#536472}
Reviewed-on: https://chromium-review.googlesource.com/929582
Reviewed-by: Steven Bennetts <stevenjb@chromium.org>
Cr-Commit-Position: refs/branch-heads/3325@{#539}
Cr-Branched-From: bc084a8b5afa3744a74927344e304c02ae54189f-refs/heads/master@{#530369}
2 files changed