mojo::Callback -> base::Callback

device/usb/mojo/device_manager_impl.cc

 // 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.
 
 #include "device/usb/mojo/device_manager_impl.h"
 
 #include <stddef.h>
 
 #include <memory>
 #include <utility>
@@ skipping 33 matching lines @@
       observer_(this),
       binding_(this, std::move(request)),
       weak_factory_(this) {
   // This object owns itself and will be destroyed if the message pipe it is
   // bound to is closed, the message loop is destructed, or the UsbService is
   // shut down.
   observer_.Add(usb_service_);
 }
 
 DeviceManagerImpl::~DeviceManagerImpl() {
-  connection_error_handler_.Run();
+  if (!connection_error_handler_.is_null())
+    connection_error_handler_.Run();
 }
 
 void DeviceManagerImpl::GetDevices(EnumerationOptionsPtr options,
                                    const GetDevicesCallback& callback) {
   usb_service_->GetDevices(base::Bind(&DeviceManagerImpl::OnGetDevices,
                                       weak_factory_.GetWeakPtr(),
                                       base::Passed(&options), callback));
 }
 
 void DeviceManagerImpl::GetDevice(
@@ skipping 46 matching lines @@
       permission_provider_->HasDevicePermission(device))
     client_->OnDeviceRemoved(DeviceInfo::From(*device));
 }
 
 void DeviceManagerImpl::WillDestroyUsbService() {
   delete this;
 }
 
 }  // namespace usb
 }  // namespace device