Use FINAL macro for classes whose virtual destructor was removed

Source/platform/audio/Biquad.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
@@ skipping 27 matching lines @@
 #include <ipps.h>
 #endif // USE(WEBAUDIO_IPP)
 
 namespace WebCore {
 
 // A basic biquad (two-zero / two-pole digital filter)
 //
 // It can be configured to a number of common and very useful filters:
 //    lowpass, highpass, shelving, parameteric, notch, allpass, ...
 
-class PLATFORM_EXPORT Biquad {
+class PLATFORM_EXPORT Biquad FINAL {
 public:
     Biquad();
     ~Biquad();
 
     void process(const float* sourceP, float* destP, size_t framesToProcess);
 
     // frequency is 0 - 1 normalized, resonance and dbGain are in decibels.
     // Q is a unitless quality factor.
     void setLowpassParams(double frequency, double resonance);
     void setHighpassParams(double frequency, double resonance);
@@ skipping 50 matching lines @@
     double m_x1; // input delayed by 1 sample
     double m_x2; // input delayed by 2 samples
     double m_y1; // output delayed by 1 sample
     double m_y2; // output delayed by 2 samples
 #endif
 };
 
 } // namespace WebCore
 
 #endif // Biquad_h