Update more platform classes to use OVERRIDE / FINAL when needed

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 20 matching lines @@
 #include "platform/audio/Panner.h"
 
 namespace WebCore {
 
 class PLATFORM_EXPORT HRTFPanner : public Panner {
 public:
     HRTFPanner(float sampleRate, HRTFDatabaseLoader*);
     virtual ~HRTFPanner();
 
     // Panner
-    virtual void pan(double azimuth, double elevation, const AudioBus* inputBus, AudioBus* outputBus, size_t framesToProcess);
-    virtual void reset();
+    virtual void pan(double azimuth, double elevation, const AudioBus* inputBus, AudioBus* outputBus, size_t framesToProcess) OVERRIDE;
+    virtual 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;
 
 private:
@@ skipping 47 matching lines @@
 
     AudioFloatArray m_tempL1;
     AudioFloatArray m_tempR1;
     AudioFloatArray m_tempL2;
     AudioFloatArray m_tempR2;
 };
 
 } // namespace WebCore
 
 #endif // HRTFPanner_h