Standardize usage of virtual/override/final in remoting/

remoting/client/audio_decode_scheduler.h

Index: remoting/client/audio_decode_scheduler.h
diff --git a/remoting/client/audio_decode_scheduler.h b/remoting/client/audio_decode_scheduler.h
index 51d5d58ed34e7ed5a052f1dceccf8af2e4a80686..7848d67c3b3428f233dd26e69c8d3dc45c8e2644 100644
--- a/remoting/client/audio_decode_scheduler.h
+++ b/remoting/client/audio_decode_scheduler.h
@@ -29,14 +29,14 @@ class AudioDecodeScheduler : public protocol::AudioStub {
       scoped_refptr<base::SingleThreadTaskRunner> main_task_runner,
       scoped_refptr<base::SingleThreadTaskRunner> audio_decode_task_runner,
       scoped_ptr<AudioPlayer> audio_player);
-  virtual ~AudioDecodeScheduler();
+  ~AudioDecodeScheduler() override;
 
   // Initializes decoder with the information from the protocol config.
   void Initialize(const protocol::SessionConfig& config);
 
   // AudioStub implementation.
-  virtual void ProcessAudioPacket(scoped_ptr<AudioPacket> packet,
-                                  const base::Closure& done) override;
+  void ProcessAudioPacket(scoped_ptr<AudioPacket> packet,
+                          const base::Closure& done) override;
 
  private:
   class Core;