Update more modules/ classes to use OVERRIDE / FINAL when needed

Source/modules/webaudio/BiquadProcessor.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 35 matching lines @@
         HighShelf = 4,
         Peaking = 5,
         Notch = 6,
         Allpass = 7
     };
 
     BiquadProcessor(AudioContext*, float sampleRate, size_t numberOfChannels, bool autoInitialize);
 
     virtual ~BiquadProcessor();
 
-    virtual PassOwnPtr<AudioDSPKernel> createKernel();
+    virtual PassOwnPtr<AudioDSPKernel> createKernel() OVERRIDE;
 
     virtual void process(const AudioBus* source, AudioBus* destination, size_t framesToProcess) OVERRIDE;
 
     // Get the magnitude and phase response of the filter at the given
     // set of frequencies (in Hz). The phase response is in radians.
     void getFrequencyResponse(int nFrequencies,
                               const float* frequencyHz,
                               float* magResponse,
                               float* phaseResponse);
 
@@ skipping 21 matching lines @@
     // so DSP kernels know when to re-compute coefficients
     bool m_filterCoefficientsDirty;
 
     // Set to true if any of the filter parameters are sample-accurate.
     bool m_hasSampleAccurateValues;
 };
 
 } // namespace WebCore
 
 #endif // BiquadProcessor_h