Standardize usage of virtual/override/final specifiers in device/.

device/hid/hid_service_linux.cc

 // 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.
 
 #include "device/hid/hid_service_linux.h"
 
 #include <fcntl.h>
 #include <string>
 
 #include "base/bind.h"
@@ skipping 57 matching lines @@
       : observer_(this), service_(service), task_runner_(task_runner) {
     DeviceMonitorLinux* monitor = DeviceMonitorLinux::GetInstance();
     observer_.Add(monitor);
     monitor->Enumerate(
         base::Bind(&Helper::OnDeviceAdded, base::Unretained(this)));
     task_runner->PostTask(
         FROM_HERE,
         base::Bind(&HidServiceLinux::FirstEnumerationComplete, service_));
   }
 
-  virtual ~Helper() {
-    DCHECK(thread_checker_.CalledOnValidThread());
-  }
+  ~Helper() override { DCHECK(thread_checker_.CalledOnValidThread()); }
 
  private:
   // DeviceMonitorLinux::Observer:
   void OnDeviceAdded(udev_device* device) override {
     DCHECK(thread_checker_.CalledOnValidThread());
     const char* device_path = udev_device_get_syspath(device);
     if (!device_path) {
       return;
     }
     const char* subsystem = udev_device_get_subsystem(device);
@@ skipping 217 matching lines @@
 
 // static
 void HidServiceLinux::ConnectImpl(scoped_ptr<ConnectParams> params) {
   DCHECK(params->device_file.IsValid());
   params->callback.Run(make_scoped_refptr(
       new HidConnectionLinux(params->device_info, params->device_file.Pass(),
                              params->file_task_runner)));
 }
 
 }  // namespace device