GitLab

Added ability to disassociate Tether and Wi-Fi networks, and now Wi-Fi and Tether networks are associated as soon as the network becomes connectable.

Adding stevenjb@ for network_icon.cc.

BUG=672263

Review-Url: https://codereview.chromium.org/2819303002
Cr-Commit-Position: refs/heads/master@{#469430}