Update {virtual,override,final} to follow C++11 style in ash.

ash/virtual_keyboard_controller_unittest.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 "ash/virtual_keyboard_controller.h"
 
 #include <vector>
 
 #include "ash/shell.h"
 #include "ash/system/chromeos/virtual_keyboard/virtual_keyboard_observer.h"
 #include "ash/test/ash_test_base.h"
 #include "ash/wm/maximize_mode/maximize_mode_controller.h"
 #include "ash/wm/maximize_mode/scoped_disable_internal_mouse_and_keyboard.h"
 #include "base/command_line.h"
 #include "ui/events/devices/device_data_manager.h"
 #include "ui/events/devices/device_hotplug_event_observer.h"
 #include "ui/events/devices/input_device.h"
 #include "ui/events/devices/keyboard_device.h"
 #include "ui/events/devices/touchscreen_device.h"
 #include "ui/keyboard/keyboard_export.h"
 #include "ui/keyboard/keyboard_switches.h"
 #include "ui/keyboard/keyboard_util.h"
 
 namespace ash {
 namespace test {
 
 class VirtualKeyboardControllerTest : public AshTestBase {
  public:
   VirtualKeyboardControllerTest() {}
-  virtual ~VirtualKeyboardControllerTest() {}
+  ~VirtualKeyboardControllerTest() override {}
 
   void UpdateTouchscreenDevices(
       std::vector<ui::TouchscreenDevice> touchscreen_devices) {
     ui::DeviceHotplugEventObserver* manager =
         ui::DeviceDataManager::GetInstance();
     manager->OnTouchscreenDevicesUpdated(touchscreen_devices);
   }
 
   void UpdateKeyboardDevices(std::vector<ui::KeyboardDevice> keyboard_devices) {
     ui::DeviceHotplugEventObserver* manager =
@@ skipping 191 matching lines @@
   keyboards.push_back(ui::KeyboardDevice(
       2, ui::InputDeviceType::INPUT_DEVICE_EXTERNAL, "keyboard"));
   keyboards.push_back(ui::KeyboardDevice(
       3, ui::InputDeviceType::INPUT_DEVICE_EXTERNAL, "keyboard"));
   UpdateKeyboardDevices(keyboards);
   ASSERT_FALSE(keyboard::IsKeyboardEnabled());
 }
 
 }  // namespace test
 }  // namespace ash