[CrOS Tether] Create TetherDisconnector, which disconnects from active tethering sessions.

chromeos/components/tether/fake_network_configuration_remover.cc

+// Copyright 2017 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "chromeos/components/tether/fake_network_configuration_remover.h"
+
+namespace chromeos {
+
+namespace tether {
+
+FakeNetworkConfigurationRemover::FakeNetworkConfigurationRemover()
+    : NetworkConfigurationRemover(
+          nullptr /* network_state_handler */,
+          nullptr /* managed_network_configuration_handler */) {}
+
+FakeNetworkConfigurationRemover::~FakeNetworkConfigurationRemover() {}
+
+void FakeNetworkConfigurationRemover::RemoveNetworkConfiguration(
+    const std::string& wifi_network_guid) {
+  last_removed_wifi_network_guid_ = wifi_network_guid;
+}
+
+}  // namespace tether
+
+}  // namespace chromeos