Implement BluetoothLowEnergyWrapperFake for Bluetooth test fixture

device/bluetooth/bluetooth_classic_win_fake.h

 // Copyright 2016 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.
 
 #ifndef DEVICE_BLUETOOTH_BLUETOOTH_CLASSIC_WIN_FAKE_H_
 #define DEVICE_BLUETOOTH_BLUETOOTH_CLASSIC_WIN_FAKE_H_
 
 #include "device/bluetooth/bluetooth_classic_win.h"
 
 #include "base/memory/scoped_ptr.h"
@@ skipping 21 matching lines @@
   BOOL FindRadioClose(HBLUETOOTH_RADIO_FIND handle) override;
   BOOL IsConnectable(HANDLE handle) override;
   HBLUETOOTH_DEVICE_FIND FindFirstDevice(
       const BLUETOOTH_DEVICE_SEARCH_PARAMS* params,
       BLUETOOTH_DEVICE_INFO* out_device_info) override;
   BOOL FindNextDevice(HBLUETOOTH_DEVICE_FIND handle,
                       BLUETOOTH_DEVICE_INFO* out_device_info) override;
   BOOL FindDeviceClose(HBLUETOOTH_DEVICE_FIND handle) override;
   BOOL EnableDiscovery(HANDLE handle, BOOL is_enable) override;
   BOOL EnableIncomingConnections(HANDLE handle, BOOL is_enable) override;
+  DWORD LastError() override;
 
   BluetoothRadio* SimulateARadio(base::string16 name,
                                  BLUETOOTH_ADDRESS address);
 
  private:
   scoped_ptr<BluetoothRadio> simulated_radios_;
+  DWORD last_error_;
 };
 
 }  // namespace device
 }  // namespace win
 
 #endif  // DEVICE_BLUETOOTH_BLUETOOTH_CLASSIC_WIN_FAKE_H_