Update {virtual,override,final} to follow C++11 style.

content/renderer/media/android/renderer_demuxer_android.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 CONTENT_RENDERER_MEDIA_ANDROID_RENDERER_DEMUXER_ANDROID_H_
 #define CONTENT_RENDERER_MEDIA_ANDROID_RENDERER_DEMUXER_ANDROID_H_
 
 #include "base/atomic_sequence_num.h"
 #include "base/id_map.h"
 #include "ipc/message_filter.h"
@@ skipping 26 matching lines @@
   //
   // Must be called on media thread.
   void AddDelegate(int demuxer_client_id, MediaSourceDelegate* delegate);
 
   // Removes the association created by AddDelegate().
   //
   // Must be called on media thread.
   void RemoveDelegate(int demuxer_client_id);
 
   // IPC::MessageFilter overrides.
-  virtual bool OnMessageReceived(const IPC::Message& message) override;
+  bool OnMessageReceived(const IPC::Message& message) override;
 
   // media::DemuxerAndroidClient "implementation".
   //
   // TODO(scherkus): Consider having RendererDemuxerAndroid actually implement
   // media::DemuxerAndroidClient and MediaSourceDelegate actually implement
   // media::DemuxerAndroid.
   void DemuxerReady(int demuxer_client_id,
                     const media::DemuxerConfigs& configs);
   void ReadFromDemuxerAck(int demuxer_client_id,
                           const media::DemuxerData& data);
   void DemuxerSeekDone(int demuxer_client_id,
                        const base::TimeDelta& actual_browser_seek_time);
   void DurationChanged(int demuxer_client_id, const base::TimeDelta& duration);
 
  protected:
   friend class base::RefCountedThreadSafe<RendererDemuxerAndroid>;
-  virtual ~RendererDemuxerAndroid();
+  ~RendererDemuxerAndroid() override;
 
  private:
   void DispatchMessage(const IPC::Message& message);
   void OnReadFromDemuxer(int demuxer_client_id,
                          media::DemuxerStream::Type type);
   void OnDemuxerSeekRequest(int demuxer_client_id,
                             const base::TimeDelta& time_to_seek,
                             bool is_browser_seek);
 
   base::AtomicSequenceNumber next_demuxer_client_id_;
 
   IDMap<MediaSourceDelegate> delegates_;
   scoped_refptr<ThreadSafeSender> thread_safe_sender_;
   scoped_refptr<base::SingleThreadTaskRunner> media_task_runner_;
 
   DISALLOW_COPY_AND_ASSIGN(RendererDemuxerAndroid);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_RENDERER_MEDIA_ANDROID_RENDERER_DEMUXER_ANDROID_H_