GitLab

Avoid initiating the upload of WebRTC event logs when either:
* Not connected to any network.
* Connected to any network other than WiFi or Ethernet.

Note that this is not bullet-proof, since a machine may be
connected to multiple networks at the same time, but
NetworkConnectionTracker only reports one of those.
Also, if connected to a mobile hotspot, this wi will appear
to us as WiFi.

Bug: 775415
Change-Id: I44ed2560903751c27c1b1fe98a66ea89bd463a3e
Reviewed-on: https://chromium-review.googlesource.com/1122123Reviewed-by: Guido Urdaneta <guidou@chromium.org>
Commit-Queue: Elad Alon <eladalon@chromium.org>
Cr-Commit-Position: refs/heads/master@{#571924}