Standardize usage of virtual/override/final in content/browser/

content/browser/media/media_internals.cc

Index: content/browser/media/media_internals.cc
diff --git a/content/browser/media/media_internals.cc b/content/browser/media/media_internals.cc
index 3813e24fc623e8e3cde1386e3c7bc4e4d70b719f..bdc47d004a36765007cb24977f33bb741f7704c9 100644
--- a/content/browser/media/media_internals.cc
+++ b/content/browser/media/media_internals.cc
@@ -68,16 +68,16 @@ class AudioLogImpl : public media::AudioLog {
   AudioLogImpl(int owner_id,
                media::AudioLogFactory::AudioComponent component,
                content::MediaInternals* media_internals);
-  virtual ~AudioLogImpl();
-
-  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;
+  ~AudioLogImpl() 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;
 
  private:
   void SendSingleStringUpdate(int component_id,