[CrOS Tether] Add the notion of a tether DeviceState.

chromeos/components/tether/tether_connector_unittest.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/tether_connector.h"
 
 #include "base/memory/ptr_util.h"
 #include "base/message_loop/message_loop.h"
 #include "chromeos/components/tether/connect_tethering_operation.h"
 #include "chromeos/components/tether/device_id_tether_network_guid_map.h"
@@ skipping 130 matching lines @@
 
 class TetherConnectorTest : public NetworkStateTest {
  public:
   TetherConnectorTest()
       : test_devices_(cryptauth::GenerateTestRemoteDevices(2u)) {}
   ~TetherConnectorTest() override {}
 
   void SetUp() override {
     DBusThreadManager::Initialize();
     NetworkStateTest::SetUp();
+    network_state_handler()->SetTetherTechnologyState(
+        NetworkStateHandler::TECHNOLOGY_ENABLED);
 
     fake_operation_factory_ =
         base::WrapUnique(new FakeConnectTetheringOperationFactory());
     ConnectTetheringOperation::Factory::SetInstanceForTesting(
         fake_operation_factory_.get());
 
     test_network_connect_ = base::WrapUnique(new TestNetworkConnect());
     fake_wifi_hotspot_connector_ =
         base::MakeUnique<FakeWifiHotspotConnector>(network_state_handler());
     fake_active_host_ = base::MakeUnique<FakeActiveHost>();
@@ skipping 308 matching lines @@
   EXPECT_EQ(test_devices_[1].GetDeviceId(),
             fake_active_host_->GetActiveHostDeviceId());
   EXPECT_EQ(GetTetherNetworkGuid(test_devices_[1].GetDeviceId()),
             fake_active_host_->GetTetherNetworkGuid());
   EXPECT_TRUE(fake_active_host_->GetWifiNetworkGuid().empty());
 }
 
 }  // namespace tether
 
 }  // namespace chromeos