Standardize usage of virtual/override/final in remoting/

remoting/protocol/audio_writer.h

Index: remoting/protocol/audio_writer.h
diff --git a/remoting/protocol/audio_writer.h b/remoting/protocol/audio_writer.h
index 73aa0d3b8fe11290409020f0fd8ccf6fd43cce2a..c5cac15d88e564bc1cc636fd1b06bd8c7a87bfe5 100644
--- a/remoting/protocol/audio_writer.h
+++ b/remoting/protocol/audio_writer.h
@@ -32,14 +32,14 @@ class AudioWriter : public ChannelDispatcherBase,
   // should be used to initialize it for the session.
   static scoped_ptr<AudioWriter> Create(const SessionConfig& config);
 
-  virtual ~AudioWriter();
+  ~AudioWriter() override;
 
   // AudioStub interface.
-  virtual void ProcessAudioPacket(scoped_ptr<AudioPacket> packet,
-                                  const base::Closure& done) override;
+  void ProcessAudioPacket(scoped_ptr<AudioPacket> packet,
+                          const base::Closure& done) override;
 
  protected:
-  virtual void OnInitialized() override;
+  void OnInitialized() override;
 
  private:
   AudioWriter();