Standardize usage of virtual/override/final in media/

media/audio/fake_audio_log_factory.cc

Index: media/audio/fake_audio_log_factory.cc
diff --git a/media/audio/fake_audio_log_factory.cc b/media/audio/fake_audio_log_factory.cc
index af5dc8eca2ac38968698cca41a6e359891aebaa9..e8677f260297523cc979bf61e45de573e485f471 100644
--- a/media/audio/fake_audio_log_factory.cc
+++ b/media/audio/fake_audio_log_factory.cc
@@ -9,15 +9,15 @@ namespace media {
 class FakeAudioLogImpl : public AudioLog {
  public:
   FakeAudioLogImpl() {}
-  virtual ~FakeAudioLogImpl() {}
-  virtual void OnCreated(int component_id,
-                         const media::AudioParameters& params,
-                         const std::string& device_id) override {}
-  virtual void OnStarted(int component_id) override {}
-  virtual void OnStopped(int component_id) override {}
-  virtual void OnClosed(int component_id) override {}
-  virtual void OnError(int component_id) override {}
-  virtual void OnSetVolume(int component_id, double volume) override {}
+  ~FakeAudioLogImpl() override {}
+  void OnCreated(int component_id,
+                 const media::AudioParameters& params,
+                 const std::string& device_id) override {}
+  void OnStarted(int component_id) override {}
+  void OnStopped(int component_id) override {}
+  void OnClosed(int component_id) override {}
+  void OnError(int component_id) override {}
+  void OnSetVolume(int component_id, double volume) override {}
 };
 
 FakeAudioLogFactory::FakeAudioLogFactory() {}