Bluetooth: mac: Crash while loging nil error.

device/bluetooth/bluetooth_low_energy_device_mac.h

 // Copyright 2015 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_DEVICE_MAC_H_
 #define DEVICE_BLUETOOTH_BLUETOOTH_LOW_ENERGY_DEVICE_MAC_H_
 
 #if defined(OS_IOS)
 #import <CoreBluetooth/CoreBluetooth.h>
 #else  // !defined(OS_IOS)
@@ skipping 110 matching lines @@
   BluetoothAdapterMac* GetMacAdapter();
 
   // Returns the CoreBluetooth Peripheral.
   CBPeripheral* GetPeripheral();
 
   // Returns BluetoothRemoteGattServiceMac based on the CBService.
   BluetoothRemoteGattServiceMac* GetBluetoothRemoteGattService(
       CBService* service) const;
 
   // Callback used when the CoreBluetooth Peripheral is disconnected.
+  void DidDisconnectPeripheral();
   void DidDisconnectPeripheral(BluetoothDevice::ConnectErrorCode error_code);
 
+  // Remove all services.
+  void RemoveAllServices();
+
   // CoreBluetooth data structure.
   base::scoped_nsobject<CBPeripheral> peripheral_;
 
   // Objective-C delegate for the CBPeripheral.
   base::scoped_nsobject<BluetoothLowEnergyPeripheralDelegate>
       peripheral_delegate_;
 
   // RSSI value.
   int rssi_;
 
   // Whether the device is connectable.
   bool connectable_;
 
   // The peripheral's identifier, as returned by [CBPeripheral identifier].
   std::string identifier_;
 
   // A local address for the device created by hashing the peripheral
   // identifier.
   std::string hash_address_;
 
   // The services (identified by UUIDs) that this device provides.
   std::set<BluetoothUUID> advertised_uuids_;
 
   DISALLOW_COPY_AND_ASSIGN(BluetoothLowEnergyDeviceMac);
 };
 
 }  // namespace device
 
 #endif  // DEVICE_BLUETOOTH_BLUETOOTH_LOW_ENERGY_DEVICE_MAC_H_