GitLab

This migrates content::PpapiPluginProcessHost::PluginNetworkObserver
from using NetworkChangeNotifier to NetworkConnectionTracker, which is
backed by the network service.

Bug: 887054
Change-Id: Ieee103c35dd2adde840ea21890c03fe4f0cc76ed
Reviewed-on: https://chromium-review.googlesource.com/c/1238446
Commit-Queue: Robbie McElrath <rmcelrath@chromium.org>
Reviewed-by: John Abd-El-Malek <jam@chromium.org>
Cr-Commit-Position: refs/heads/master@{#596056}