Update platform classes to use OVERRIDE / FINAL when needed

Source/platform/audio/AudioDelayDSPKernel.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 16 matching lines @@
 
 #include "platform/audio/AudioArray.h"
 #include "platform/audio/AudioDSPKernel.h"
 
 namespace WebCore {
 
 class PLATFORM_EXPORT AudioDelayDSPKernel : public AudioDSPKernel {
 public:
     AudioDelayDSPKernel(double maxDelayTime, float sampleRate);
 
-    virtual void process(const float* source, float* destination, size_t framesToProcess);
-    virtual void reset();
+    virtual void process(const float* source, float* destination, size_t framesToProcess) OVERRIDE;
+    virtual void reset() OVERRIDE;
 
     double maxDelayTime() const { return m_maxDelayTime; }
 
     void setDelayFrames(double numberOfFrames) { m_desiredDelayFrames = numberOfFrames; }
 
     virtual double tailTime() const OVERRIDE;
     virtual double latencyTime() const OVERRIDE;
 
 protected:
     AudioDelayDSPKernel(AudioDSPKernelProcessor*, size_t processingSizeInFrames);
@@ skipping 11 matching lines @@
     double m_desiredDelayFrames;
 
     AudioFloatArray m_delayTimes;
 
     size_t bufferLengthForDelay(double delayTime, double sampleRate) const;
 };
 
 } // namespace WebCore
 
 #endif // AudioDelayDSPKernel_h