Convert HidDeviceInfo from a struct to a refcounted class.

device/hid/hid_service_mac.h

 // Copyright 2014 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_HID_HID_SERVICE_MAC_H_
 #define DEVICE_HID_HID_SERVICE_MAC_H_
 
 #include <CoreFoundation/CoreFoundation.h>
 #include <IOKit/IOKitLib.h>
 
@@ skipping 22 matching lines @@
  private:
   ~HidServiceMac() override;
 
   // IOService matching callbacks.
   static void FirstMatchCallback(void* context, io_iterator_t iterator);
   static void TerminatedCallback(void* context, io_iterator_t iterator);
 
   void AddDevices();
   void RemoveDevices();
 
+  static scoped_refptr<device::HidDeviceInfo> CreateDeviceInfo(
+      io_service_t device);
+
   // Platform notification port.
   IONotificationPortRef notify_port_;
   base::mac::ScopedIOObject<io_iterator_t> devices_added_iterator_;
   base::mac::ScopedIOObject<io_iterator_t> devices_removed_iterator_;
 
   // The task runner for the thread on which this service was created.
   scoped_refptr<base::SingleThreadTaskRunner> task_runner_;
 
   // The task runner for the FILE thread of the application using this service
   // on which slow running I/O operations can be performed.
   scoped_refptr<base::SingleThreadTaskRunner> file_task_runner_;
 
   DISALLOW_COPY_AND_ASSIGN(HidServiceMac);
 };
 
 }  // namespace device
 
 #endif  // DEVICE_HID_HID_SERVICE_MAC_H_