Standardize usage of virtual/override/final in media/

media/video/capture/file_video_capture_device.h

 // Copyright 2013 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_FILE_VIDEO_CAPTURE_DEVICE_H_
 #define MEDIA_VIDEO_CAPTURE_FILE_VIDEO_CAPTURE_DEVICE_H_
 
 #include <string>
 
 #include "base/files/file.h"
@@ skipping 17 matching lines @@
   static int64 ParseFileAndExtractVideoFormat(
       base::File* file,
       media::VideoCaptureFormat* video_format);
   static base::File OpenFileForRead(const base::FilePath& file_path);
 
   // Constructor of the class, with a fully qualified file path as input, which
   // represents the Y4M video file to stream repeatedly.
   explicit FileVideoCaptureDevice(const base::FilePath& file_path);
 
   // VideoCaptureDevice implementation, class methods.
-  virtual ~FileVideoCaptureDevice();
-  virtual void AllocateAndStart(
-      const VideoCaptureParams& params,
-      scoped_ptr<VideoCaptureDevice::Client> client) override;
-  virtual void StopAndDeAllocate() override;
+  ~FileVideoCaptureDevice() override;
+  void AllocateAndStart(const VideoCaptureParams& params,
+                        scoped_ptr<VideoCaptureDevice::Client> client) override;
+  void StopAndDeAllocate() override;
 
  private:
   // Returns size in bytes of an I420 frame, not including possible paddings,
   // defined by |capture_format_|.
   int CalculateFrameSize();
 
   // Called on the |capture_thread_|.
   void OnAllocateAndStart(const VideoCaptureParams& params,
                           scoped_ptr<Client> client);
   void OnStopAndDeAllocate();
@@ skipping 15 matching lines @@
   int frame_size_;
   int64 current_byte_index_;
   int64 first_frame_byte_index_;
 
   DISALLOW_COPY_AND_ASSIGN(FileVideoCaptureDevice);
 };
 
 }  // namespace media
 
 #endif  // MEDIA_VIDEO_CAPTURE_FILE_VIDEO_CAPTURE_DEVICE_H_