Standardize usage of virtual/override/final in media/

media/cast/receiver/cast_receiver_impl.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_CAST_RECEIVER_CAST_RECEIVER_IMPL_H_
 #define MEDIA_CAST_RECEIVER_CAST_RECEIVER_IMPL_H_
 
 #include "base/memory/ref_counted.h"
 #include "base/memory/scoped_ptr.h"
 #include "media/cast/cast_config.h"
@@ skipping 11 matching lines @@
 // This is a pure owner class that groups all required receiver-related objects
 // together, such as the paced packet sender, audio/video RTP frame receivers,
 // and software decoders (created on-demand).
 class CastReceiverImpl : public CastReceiver {
  public:
   CastReceiverImpl(scoped_refptr<CastEnvironment> cast_environment,
                    const FrameReceiverConfig& audio_config,
                    const FrameReceiverConfig& video_config,
                    PacketSender* const packet_sender);
 
-  virtual ~CastReceiverImpl();
+  ~CastReceiverImpl() override;
 
   // CastReceiver implementation.
-  virtual PacketReceiverCallback packet_receiver() override;
-  virtual void RequestDecodedAudioFrame(
+  PacketReceiverCallback packet_receiver() override;
+  void RequestDecodedAudioFrame(
       const AudioFrameDecodedCallback& callback) override;
-  virtual void RequestEncodedAudioFrame(
+  void RequestEncodedAudioFrame(
       const ReceiveEncodedFrameCallback& callback) override;
-  virtual void RequestDecodedVideoFrame(
+  void RequestDecodedVideoFrame(
       const VideoFrameDecodedCallback& callback) override;
-  virtual void RequestEncodedVideoFrame(
+  void RequestEncodedVideoFrame(
       const ReceiveEncodedFrameCallback& callback) override;
 
  private:
   // Forwards |packet| to a specific RTP frame receiver, or drops it if SSRC
   // does not map to one of the receivers.
   void DispatchReceivedPacket(scoped_ptr<Packet> packet);
 
   // Feeds an EncodedFrame into |audio_decoder_|.  RequestDecodedAudioFrame()
   // uses this as a callback for RequestEncodedAudioFrame().
   void DecodeEncodedAudioFrame(
@@ skipping 60 matching lines @@
   // images for playback.
   scoped_ptr<VideoDecoder> video_decoder_;
 
   DISALLOW_COPY_AND_ASSIGN(CastReceiverImpl);
 };
 
 }  // namespace cast
 }  // namespace media
 
 #endif  // MEDIA_CAST_RECEIVER_CAST_RECEIVER_IMPL_