Fix virtual/override/final usage in Source/platform/.

Source/platform/audio/HRTFPanner.h

 /*
  * Copyright (C) 2010, Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1.  Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2.  Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
@@ skipping 17 matching lines @@
 #include "platform/audio/AudioDelayDSPKernel.h"
 #include "platform/audio/FFTConvolver.h"
 #include "platform/audio/HRTFDatabaseLoader.h"
 #include "platform/audio/Panner.h"
 
 namespace blink {
 
 class PLATFORM_EXPORT HRTFPanner final : public Panner {
 public:
     HRTFPanner(float sampleRate, HRTFDatabaseLoader*);
-    virtual ~HRTFPanner();
+    ~HRTFPanner() override;
 
     // Panner
-    virtual void pan(double azimuth, double elevation, const AudioBus* inputBus, AudioBus* outputBus, size_t framesToProcess) override;
-    virtual void reset() override;
+    void pan(double azimuth, double elevation, const AudioBus* inputBus, AudioBus* outputBus, size_t framesToProcess) override;
+    void reset() override;
 
     size_t fftSize() const { return fftSizeForSampleRate(m_sampleRate); }
     static size_t fftSizeForSampleRate(float sampleRate);
 
     float sampleRate() const { return m_sampleRate; }
 
-    virtual double tailTime() const override;
-    virtual double latencyTime() const override;
+    double tailTime() const override;
+    double latencyTime() const override;
 
 private:
     // Given an azimuth angle in the range -180 -> +180, returns the corresponding azimuth index for the database,
     // and azimuthBlend which is an interpolation value from 0 -> 1.
     int calculateDesiredAzimuthIndexAndBlend(double azimuth, double& azimuthBlend);
 
     RefPtr<HRTFDatabaseLoader> m_databaseLoader;
 
     float m_sampleRate;
 
@@ skipping 39 matching lines @@
 
     AudioFloatArray m_tempL1;
     AudioFloatArray m_tempR1;
     AudioFloatArray m_tempL2;
     AudioFloatArray m_tempR2;
 };
 
 } // namespace blink
 
 #endif // HRTFPanner_h