Adding the last test related with connect/disconnect

device/bluetooth/bluetooth_device_mac.h

Index: device/bluetooth/bluetooth_device_mac.h
diff --git a/device/bluetooth/bluetooth_device_mac.h b/device/bluetooth/bluetooth_device_mac.h
index ceb8515e8fe2700b263f0b41d77331c20de62ec0..0124eac3d7f793e9981a8bb7000afc0fe46a0989 100644
--- a/device/bluetooth/bluetooth_device_mac.h
+++ b/device/bluetooth/bluetooth_device_mac.h
@@ -14,7 +14,7 @@ namespace device {
 
 class BluetoothAdapterMac;
 
-class BluetoothDeviceMac : public BluetoothDevice {
+class DEVICE_BLUETOOTH_EXPORT BluetoothDeviceMac : public BluetoothDevice {
  public:
   ~BluetoothDeviceMac() override;
 
@@ -22,6 +22,12 @@ class BluetoothDeviceMac : public BluetoothDevice {
   // nil if the device has never been seen.
   virtual NSDate* GetLastUpdateTime() const = 0;
 
+  // Converts between ConnectErrorCode and NSError.
+  static NSError* GetNSErrorFromConnectErrorCode(
+      BluetoothDevice::ConnectErrorCode error_code);
+  static BluetoothDevice::ConnectErrorCode GetConnectErrorCodeFromNSError(
+      NSError* error);
+
  protected:
   BluetoothDeviceMac(BluetoothAdapterMac* adapter);