Add BluetoothRemoteGattServiceWin to BluetoothDeviceWin

device/bluetooth/bluetooth_device.h

Index: device/bluetooth/bluetooth_device.h
diff --git a/device/bluetooth/bluetooth_device.h b/device/bluetooth/bluetooth_device.h
index 17c5fdab72bba51cbccb6a34b64b7332f2551d67..2bf6f35b83fdbd9cce831026351cdfc1b3276cfc 100644
--- a/device/bluetooth/bluetooth_device.h
+++ b/device/bluetooth/bluetooth_device.h
@@ -457,6 +457,9 @@ class DEVICE_BLUETOOTH_EXPORT BluetoothDevice {
   // empty string.
   static std::string CanonicalizeAddress(const std::string& address);
 
+  // Return associated BluetoothAdapter.
+  BluetoothAdapter* GetAdapter() { return adapter_; }
+
  protected:
   // BluetoothGattConnection is a friend to call Add/RemoveGattConnection.
   friend BluetoothGattConnection;