Standardize usage of virtual/override/final specifiers.

media/video/capture/linux/video_capture_device_linux.h

 // Copyright (c) 2012 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.
 
 // Linux specific implementation of VideoCaptureDevice.
 // V4L2 is used for capturing. V4L2 does not provide its own thread for
 // capturing so this implementation uses a Chromium thread for fetching frames
 // from V4L2.
 
 #ifndef MEDIA_VIDEO_CAPTURE_LINUX_VIDEO_CAPTURE_DEVICE_LINUX_H_
 #define MEDIA_VIDEO_CAPTURE_LINUX_VIDEO_CAPTURE_DEVICE_LINUX_H_
 
 #include <string>
 
 #include "base/files/file_util.h"
 #include "base/files/scoped_file.h"
 #include "base/threading/thread.h"
 #include "media/video/capture/video_capture_device.h"
 #include "media/video/capture/video_capture_types.h"
 
 namespace media {
 
 class VideoCaptureDeviceLinux : public VideoCaptureDevice {
  public:
   static VideoPixelFormat V4l2ColorToVideoCaptureColorFormat(int32 v4l2_fourcc);
   static void GetListOfUsableFourCCs(bool favour_mjpeg,
                                      std::list<int>* fourccs);
 
   explicit VideoCaptureDeviceLinux(const Name& device_name);
-  virtual ~VideoCaptureDeviceLinux();
+  ~VideoCaptureDeviceLinux() override;
 
   // VideoCaptureDevice implementation.
-  virtual void AllocateAndStart(const VideoCaptureParams& params,
-                                scoped_ptr<Client> client) override;
+  void AllocateAndStart(const VideoCaptureParams& params,
+                        scoped_ptr<Client> client) override;
 
-  virtual void StopAndDeAllocate() override;
+  void StopAndDeAllocate() override;
 
  protected:
   void SetRotation(int rotation);
 
   // Once |v4l2_thread_| is started, only called on that thread.
   void SetRotationOnV4L2Thread(int rotation);
 
  private:
   enum InternalState {
     kIdle,  // The device driver is opened but camera is not in use.
@@ skipping 35 matching lines @@
   // This is only used on |v4l2_thread_| when it is running, or the constructor
   // thread otherwise.
   int rotation_;
 
   DISALLOW_IMPLICIT_CONSTRUCTORS(VideoCaptureDeviceLinux);
 };
 
 }  // namespace media
 
 #endif  // MEDIA_VIDEO_CAPTURE_LINUX_VIDEO_CAPTURE_DEVICE_LINUX_H_