Standardize usage of virtual/override/final in remoting/

remoting/client/plugin/media_source_video_renderer.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 REMOTING_CLIENT_PLUGIN_MEDIA_SOURCE_VIDEO_RENDERER_H_
 #define REMOTING_CLIENT_PLUGIN_MEDIA_SOURCE_VIDEO_RENDERER_H_
 
 #include <string>
 
 #include "base/basictypes.h"
@@ skipping 25 matching lines @@
     // Called when the MediaSource needs to be reset (e.g. because screen size
     // has changed).
     virtual void OnMediaSourceReset(const std::string& format) = 0;
 
     // Called when new data becomes available.
     virtual void OnMediaSourceData(uint8_t* buffer, size_t buffer_size,
                                    bool keyframe) = 0;
   };
 
   explicit MediaSourceVideoRenderer(Delegate* delegate);
-  virtual ~MediaSourceVideoRenderer();
+  ~MediaSourceVideoRenderer() override;
 
   // VideoRenderer interface.
-  virtual void Initialize(const protocol::SessionConfig& config) override;
-  virtual ChromotingStats* GetStats() override;
-  virtual void ProcessVideoPacket(scoped_ptr<VideoPacket> packet,
-                                  const base::Closure& done) override;
+  void Initialize(const protocol::SessionConfig& config) override;
+  ChromotingStats* GetStats() override;
+  void ProcessVideoPacket(scoped_ptr<VideoPacket> packet,
+                          const base::Closure& done) override;
 
  private:
   // Helper class used to generate WebM stream.
   class VideoWriter;
 
   Delegate* delegate_;
 
   std::string format_string_;
   const char* codec_id_;
 
   scoped_ptr<VideoWriter> writer_;
   webrtc::DesktopVector frame_dpi_;
   webrtc::DesktopRegion desktop_shape_;
 
   ChromotingStats stats_;
   int64 latest_sequence_number_;
 
   DISALLOW_COPY_AND_ASSIGN(MediaSourceVideoRenderer);
 };
 
 }  // namespace remoting
 
 #endif  // REMOTING_CLIENT_PLUGIN_MEDIA_SOURCE_VIDEO_RENDERER_H_