bluetooth: macOS: Adding log in BluetoothAdapterMac::DisconnectGatt()

device/bluetooth/bluetooth_adapter_mac.mm

 // Copyright 2013 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.
 
 #include "device/bluetooth/bluetooth_adapter_mac.h"
 
 #import <IOBluetooth/objc/IOBluetoothDevice.h>
 #import <IOBluetooth/objc/IOBluetoothHostController.h>
 #include <stddef.h>
 
@@ skipping 623 matching lines @@
       }
     }
     connected_devices.push_back(device_mac);
     VLOG(1) << *device_mac << ": New connected device.";
   }
   return connected_devices;
 }
 
 void BluetoothAdapterMac::CreateGattConnection(
     BluetoothLowEnergyDeviceMac* device_mac) {
+  VLOG(1) << *device_mac << ": Create gatt connection.";
   [low_energy_central_manager_ connectPeripheral:device_mac->peripheral_
                                          options:nil];
 }
 
 void BluetoothAdapterMac::DisconnectGatt(
     BluetoothLowEnergyDeviceMac* device_mac) {
+  VLOG(1) << *device_mac << ": Disconnect gatt.";
   [low_energy_central_manager_
       cancelPeripheralConnection:device_mac->peripheral_];
 }
 
 void BluetoothAdapterMac::DidConnectPeripheral(CBPeripheral* peripheral) {
   BluetoothLowEnergyDeviceMac* device_mac =
       GetBluetoothLowEnergyDeviceMac(peripheral);
   if (!device_mac) {
     [low_energy_central_manager_ cancelPeripheralConnection:peripheral];
     return;
@@ skipping 68 matching lines @@
                                                  NSError* error) {
   if (!error) {
     return out << "no error";
   }
   return out << "error domain: " << base::SysNSStringToUTF8(error.domain)
              << ", code: " << std::to_string(error.code) << ", description: "
              << base::SysNSStringToUTF8(error.localizedDescription);
 }
 
 }  // namespace device