Standardize usage of virtual/override/final in media/

media/video/capture/mac/video_capture_device_decklink_mac.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.
 
 // Implementation of VideoCaptureDevice class for Blackmagic video capture
 // devices by using the DeckLink SDK.
 
 #ifndef MEDIA_VIDEO_CAPTURE_VIDEO_CAPTURE_DEVICE_DECKLINK_MAC_H_
 #define MEDIA_VIDEO_CAPTURE_VIDEO_CAPTURE_DEVICE_DECKLINK_MAC_H_
 
@@ skipping 23 matching lines @@
   static void EnumerateDevices(VideoCaptureDevice::Names* device_names);
 
   // Gets the supported formats of a particular device attached to the system,
   // identified by |device|. Formats are retrieved from the DeckLink SDK.
   // Following the enumeration, each camera will have only one capability.
   static void EnumerateDeviceCapabilities(
       const VideoCaptureDevice::Name& device,
       VideoCaptureFormats* supported_formats);
 
   explicit VideoCaptureDeviceDeckLinkMac(const Name& device_name);
-  virtual ~VideoCaptureDeviceDeckLinkMac();
+  ~VideoCaptureDeviceDeckLinkMac() override;
 
   // Copy of VideoCaptureDevice::Client::OnIncomingCapturedData(). Used by
   // |decklink_capture_delegate_| to forward captured frames.
   void OnIncomingCapturedData(const uint8* data,
                               size_t length,
                               const VideoCaptureFormat& frame_format,
                               int rotation,  // Clockwise.
                               base::TimeTicks timestamp);
 
   // Forwarder to VideoCaptureDevice::Client::OnError().
   void SendErrorString(const std::string& reason);
 
   // Forwarder to VideoCaptureDevice::Client::OnLog().
   void SendLogString(const std::string& message);
 
  private:
   // VideoCaptureDevice implementation.
-  virtual void AllocateAndStart(
-      const VideoCaptureParams& params,
-      scoped_ptr<VideoCaptureDevice::Client> client) override;
-  virtual void StopAndDeAllocate() override;
+  void AllocateAndStart(const VideoCaptureParams& params,
+                        scoped_ptr<VideoCaptureDevice::Client> client) override;
+  void StopAndDeAllocate() override;
 
   // Protects concurrent setting and using of |client_|.
   base::Lock lock_;
   scoped_ptr<VideoCaptureDevice::Client> client_;
 
   // Reference counted handle to the DeckLink capture delegate, ref counted by
   // the DeckLink SDK as well.
   scoped_refptr<DeckLinkCaptureDelegate> decklink_capture_delegate_;
 
   // Checks for Device (a.k.a. Audio) thread.
   base::ThreadChecker thread_checker_;
 
   DISALLOW_COPY_AND_ASSIGN(VideoCaptureDeviceDeckLinkMac);
 };
 
 }  // namespace media
 
 #endif  // MEDIA_VIDEO_CAPTURE_VIDEO_CAPTURE_DEVICE_DECKLINK_MAC_H_