Bluetooth: macOS: Adding logs

device/bluetooth/bluetooth_remote_gatt_descriptor_mac.h

 // Copyright 2017 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_REMOTE_GATT_DESCRIPTOR_MAC_H_
 #define DEVICE_BLUETOOTH_BLUETOOTH_REMOTE_GATT_DESCRIPTOR_MAC_H_
 
 #include "device/bluetooth/bluetooth_remote_gatt_descriptor.h"
 
 #include <vector>
@@ skipping 30 matching lines @@
                             const ErrorCallback& error_callback) override;
   void WriteRemoteDescriptor(const std::vector<uint8_t>& new_value,
                              const base::Closure& callback,
                              const ErrorCallback& error_callback) override;
 
  private:
   friend class BluetoothRemoteGattCharacteristicMac;
 
   // Returns CoreBluetooth descriptor.
   CBDescriptor* GetCBDescriptor() const;
+  // Returns a description for the descriptor, that should be used for logs.
+  std::string ToString() const;
   // gatt_characteristic_ owns instances of this class.
   BluetoothRemoteGattCharacteristicMac* gatt_characteristic_;
   // Descriptor from CoreBluetooth.
   base::scoped_nsobject<CBDescriptor> cb_descriptor_;
   // Descriptor identifier.
   std::string identifier_;
   // Descriptor UUID.
   BluetoothUUID uuid_;
   // Descriptor value.
   std::vector<uint8_t> value_;
 };
 
 }  // namespace device
 
 #endif  // DEVICE_BLUETOOTH_BLUETOOTH_REMOTE_GATT_CHARACTERISTIC_MAC_H_