Standardize usage of virtual/override/final specifiers.

media/audio/alsa/audio_manager_alsa.h

Index: media/audio/alsa/audio_manager_alsa.h
diff --git a/media/audio/alsa/audio_manager_alsa.h b/media/audio/alsa/audio_manager_alsa.h
index 40801fc5608ce97926ce8711a4aa9c59cc2b30fd..46a28b172fbbd21d689b1f91dd295e71dab5e077 100644
--- a/media/audio/alsa/audio_manager_alsa.h
+++ b/media/audio/alsa/audio_manager_alsa.h
@@ -22,31 +22,31 @@ class MEDIA_EXPORT AudioManagerAlsa : public AudioManagerBase {
   static void ShowLinuxAudioInputSettings();
 
   // Implementation of AudioManager.
-  virtual bool HasAudioOutputDevices() override;
-  virtual bool HasAudioInputDevices() override;
-  virtual void ShowAudioInputSettings() override;
-  virtual void GetAudioInputDeviceNames(
-      AudioDeviceNames* device_names) override;
-  virtual void GetAudioOutputDeviceNames(
-      AudioDeviceNames* device_names) override;
-  virtual AudioParameters GetInputStreamParameters(
+  bool HasAudioOutputDevices() override;
+  bool HasAudioInputDevices() override;
+  void ShowAudioInputSettings() override;
+  void GetAudioInputDeviceNames(AudioDeviceNames* device_names) override;
+  void GetAudioOutputDeviceNames(AudioDeviceNames* device_names) override;
+  AudioParameters GetInputStreamParameters(
       const std::string& device_id) override;
 
   // Implementation of AudioManagerBase.
-  virtual AudioOutputStream* MakeLinearOutputStream(
+  AudioOutputStream* MakeLinearOutputStream(
       const AudioParameters& params) override;
-  virtual AudioOutputStream* MakeLowLatencyOutputStream(
+  AudioOutputStream* MakeLowLatencyOutputStream(
+      const AudioParameters& params,
+      const std::string& device_id) override;
+  AudioInputStream* MakeLinearInputStream(
+      const AudioParameters& params,
+      const std::string& device_id) override;
+  AudioInputStream* MakeLowLatencyInputStream(
       const AudioParameters& params,
       const std::string& device_id) override;
-  virtual AudioInputStream* MakeLinearInputStream(
-      const AudioParameters& params, const std::string& device_id) override;
-  virtual AudioInputStream* MakeLowLatencyInputStream(
-      const AudioParameters& params, const std::string& device_id) override;
 
  protected:
-  virtual ~AudioManagerAlsa();
+  ~AudioManagerAlsa() override;
 
-  virtual AudioParameters GetPreferredOutputStreamParameters(
+  AudioParameters GetPreferredOutputStreamParameters(
       const std::string& output_device_id,
       const AudioParameters& input_params) override;