Update {virtual,override,final} to follow C++11 style in media, round 2.

media/video/capture/linux/video_capture_device_chromeos.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 MEDIA_VIDEO_CAPTURE_LINUX_VIDEO_CAPTURE_DEVICE_CHROMEOS_H_
 #define MEDIA_VIDEO_CAPTURE_LINUX_VIDEO_CAPTURE_DEVICE_CHROMEOS_H_
 
 #include "media/video/capture/linux/video_capture_device_linux.h"
 
 namespace gfx {
 class Display;
 }  // namespace gfx
 
 namespace media {
 
 // This class is functionally the same as VideoCaptureDeviceLinux, with the
 // exception that it is aware of the orientation of the internal Display.  When
 // the internal Display is rotated, the frames captured are rotated to match.
 class VideoCaptureDeviceChromeOS : public VideoCaptureDeviceLinux {
  public:
   explicit VideoCaptureDeviceChromeOS(
       scoped_refptr<base::SingleThreadTaskRunner> ui_task_runner,
       const Name& device_name);
-  virtual ~VideoCaptureDeviceChromeOS();
+  ~VideoCaptureDeviceChromeOS() override;
 
  private:
   class ScreenObserverDelegate;
 
   void SetDisplayRotation(const gfx::Display& display);
   scoped_refptr<ScreenObserverDelegate> screen_observer_delegate_;
   DISALLOW_IMPLICIT_CONSTRUCTORS(VideoCaptureDeviceChromeOS);
 };
 
 }  // namespace media
 
 #endif  // MEDIA_VIDEO_CAPTURE_LINUX_VIDEO_CAPTURE_DEVICE_CHROMEOS_H_