Standardize usage of virtual/override/final in media/

media/blink/buffered_data_source.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_BLINK_BUFFERED_DATA_SOURCE_H_
 #define MEDIA_BLINK_BUFFERED_DATA_SOURCE_H_
 
 #include <string>
 #include <vector>
 
@@ skipping 52 matching lines @@
   // will be reported to |host|. |downloading_cb| will be called whenever the
   // downloading/paused state of the source changes.
   BufferedDataSource(
       const GURL& url,
       BufferedResourceLoader::CORSMode cors_mode,
       const scoped_refptr<base::SingleThreadTaskRunner>& task_runner,
       blink::WebFrame* frame,
       MediaLog* media_log,
       BufferedDataSourceHost* host,
       const DownloadingCB& downloading_cb);
-  virtual ~BufferedDataSource();
+  ~BufferedDataSource() override;
 
   // Executes |init_cb| with the result of initialization when it has completed.
   //
   // Method called on the render thread.
   typedef base::Callback<void(bool)> InitializeCB;
   void Initialize(const InitializeCB& init_cb);
 
   // Adjusts the buffering algorithm based on the given preload value.
   void SetPreload(Preload preload);
 
@@ skipping 17 matching lines @@
   // behavior.
   void MediaPlaybackRateChanged(float playback_rate);
   void MediaIsPlaying();
   void MediaIsPaused();
 
   // Returns true if the resource is local.
   bool assume_fully_buffered() { return !url_.SchemeIsHTTPOrHTTPS(); }
 
   // DataSource implementation.
   // Called from demuxer thread.
-  virtual void Stop() override;
+  void Stop() override;
 
-  virtual void Read(int64 position, int size, uint8* data,
-                    const DataSource::ReadCB& read_cb) override;
-  virtual bool GetSize(int64* size_out) override;
-  virtual bool IsStreaming() override;
-  virtual void SetBitrate(int bitrate) override;
+  void Read(int64 position,
+            int size,
+            uint8* data,
+            const DataSource::ReadCB& read_cb) override;
+  bool GetSize(int64* size_out) override;
+  bool IsStreaming() override;
+  void SetBitrate(int bitrate) override;
 
  protected:
   // A factory method to create a BufferedResourceLoader based on the read
   // parameters. We can override this file to object a mock
   // BufferedResourceLoader for testing.
   virtual BufferedResourceLoader* CreateResourceLoader(
       int64 first_byte_position, int64 last_byte_position);
 
  private:
   friend class BufferedDataSourceTest;
@@ skipping 103 matching lines @@
 
   // NOTE: Weak pointers must be invalidated before all other member variables.
   base::WeakPtrFactory<BufferedDataSource> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(BufferedDataSource);
 };
 
 }  // namespace media
 
 #endif  // MEDIA_BLINK_BUFFERED_DATA_SOURCE_H_