Standardize usage of virtual/override/final in components/

components/copresence/mediums/audio/audio_recorder_unittest.cc

Index: components/copresence/mediums/audio/audio_recorder_unittest.cc
diff --git a/components/copresence/mediums/audio/audio_recorder_unittest.cc b/components/copresence/mediums/audio/audio_recorder_unittest.cc
index 2c812138e635a8dbd965fd81fb985b13520d46bc..1e01c94c92c7a3251d9a1cbd8cbbb3913a9bbec0 100644
--- a/components/copresence/mediums/audio/audio_recorder_unittest.cc
+++ b/components/copresence/mediums/audio/audio_recorder_unittest.cc
@@ -29,10 +29,10 @@ class TestAudioInputStream : public media::AudioInputStream {
     buffer_->set_frames(samples);
   }
 
-  virtual ~TestAudioInputStream() {}
+  ~TestAudioInputStream() override {}
 
-  virtual bool Open() override { return true; }
-  virtual void Start(AudioInputCallback* callback) override {
+  bool Open() override { return true; }
+  void Start(AudioInputCallback* callback) override {
     DCHECK(callback);
     callback_ = callback;
     media::AudioManager::Get()->GetTaskRunner()->PostTask(
@@ -40,14 +40,14 @@ class TestAudioInputStream : public media::AudioInputStream {
         base::Bind(&TestAudioInputStream::SimulateRecording,
                    base::Unretained(this)));
   }
-  virtual void Stop() override {}
-  virtual void Close() override {}
-  virtual double GetMaxVolume() override { return 1.0; }
-  virtual void SetVolume(double volume) override {}
-  virtual double GetVolume() override { return 1.0; }
-  virtual void SetAutomaticGainControl(bool enabled) override {}
-  virtual bool GetAutomaticGainControl() override { return true; }
-  virtual bool IsMuted() override { return false; }
+  void Stop() override {}
+  void Close() override {}
+  double GetMaxVolume() override { return 1.0; }
+  void SetVolume(double volume) override {}
+  double GetVolume() override { return 1.0; }
+  void SetAutomaticGainControl(bool enabled) override {}
+  bool GetAutomaticGainControl() override { return true; }
+  bool IsMuted() override { return false; }
 
  private:
   void SimulateRecording() {