Add cross platform Bluetooth testing fixture for Windows.

device/bluetooth/bluetooth_low_energy_win.h

 // Copyright 2014 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_LOW_ENERGY_WIN_H_
 #define DEVICE_BLUETOOTH_BLUETOOTH_LOW_ENERGY_WIN_H_
 
 #include <stddef.h>
 #include <stdint.h>
 
@@ skipping 58 matching lines @@
 
  private:
   DEVPROPTYPE property_type_;
   scoped_ptr<uint8_t[]> value_;
   size_t value_size_;
 
   DISALLOW_COPY_AND_ASSIGN(DevicePropertyValue);
 };
 
 // Returns true only on Windows platforms supporting Bluetooth Low Energy.
-bool IsBluetoothLowEnergySupported();
+bool DEVICE_BLUETOOTH_EXPORT IsBluetoothLowEnergySupported();
 
 struct BluetoothLowEnergyServiceInfo {
   BluetoothLowEnergyServiceInfo();
   ~BluetoothLowEnergyServiceInfo();
 
   BTH_LE_UUID uuid;
 };
 
 struct BluetoothLowEnergyDeviceInfo {
   BluetoothLowEnergyDeviceInfo();
@@ skipping 30 matching lines @@
 bool DEVICE_BLUETOOTH_EXPORT
 ExtractBluetoothAddressFromDeviceInstanceIdForTesting(
     const std::string& instance_id,
     BLUETOOTH_ADDRESS* btha,
     std::string* error);
 
 }  // namespace win
 }  // namespace device
 
 #endif  // DEVICE_BLUETOOTH_BLUETOOTH_LOW_ENERGY_WIN_H_