cros: Clean up TrayBluetoothHelper todos

ash/common/system/chromeos/bluetooth/tray_bluetooth_helper_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 "ash/common/system/chromeos/bluetooth/tray_bluetooth_helper.h"
 
 #include <vector>
 
 #include "ash/common/system/tray/system_tray_delegate.h"
 #include "ash/test/ash_test_base.h"
@@ skipping 17 matching lines @@
           BluezDBusManager::Get()->GetBluetoothAdapterClient());
   adapter_client->SetSimulationIntervalMs(0);
 
   TrayBluetoothHelper helper;
   helper.Initialize();
   RunAllPendingInMessageLoop();
   EXPECT_TRUE(helper.GetBluetoothAvailable());
   EXPECT_FALSE(helper.GetBluetoothEnabled());
   EXPECT_FALSE(helper.HasBluetoothDiscoverySession());
 
-  std::vector<ash::BluetoothDeviceInfo> devices;
-  helper.GetAvailableBluetoothDevices(&devices);
+  BluetoothDeviceList devices = helper.GetAvailableBluetoothDevices();
   // The devices are fake in tests, so don't assume any particular number.
   EXPECT_FALSE(devices.empty());
 
   // Turn Bluetooth on.
   helper.ToggleBluetoothEnabled();
   RunAllPendingInMessageLoop();
   EXPECT_TRUE(helper.GetBluetoothEnabled());
 
   helper.StartBluetoothDiscovering();
   RunAllPendingInMessageLoop();
   EXPECT_TRUE(helper.HasBluetoothDiscoverySession());
 
   helper.StopBluetoothDiscovering();
   RunAllPendingInMessageLoop();
   EXPECT_FALSE(helper.HasBluetoothDiscoverySession());
 
   // Turn Bluetooth off.
   helper.ToggleBluetoothEnabled();
   RunAllPendingInMessageLoop();
   EXPECT_FALSE(helper.GetBluetoothEnabled());
 }
 
 }  // namespace
 }  // namespace ash