Update modules classes to use OVERRIDE / FINAL when needed

Source/modules/webaudio/BiquadProcessor.h

Index: Source/modules/webaudio/BiquadProcessor.h
diff --git a/Source/modules/webaudio/BiquadProcessor.h b/Source/modules/webaudio/BiquadProcessor.h
index 6c3e330709456f78ebda956427ec39cc8459ef1f..995b3714219866e83b885bcb06f187c071ccad4d 100644
--- a/Source/modules/webaudio/BiquadProcessor.h
+++ b/Source/modules/webaudio/BiquadProcessor.h
@@ -36,7 +36,7 @@ namespace WebCore {
 
 // BiquadProcessor is an AudioDSPKernelProcessor which uses Biquad objects to implement several common filters.
 
-class BiquadProcessor : public AudioDSPKernelProcessor {
+class BiquadProcessor FINAL : public AudioDSPKernelProcessor {
 public:
     enum FilterType {
         LowPass = 0,
@@ -55,7 +55,7 @@ public:
 
     virtual PassOwnPtr<AudioDSPKernel> createKernel();
 
-    virtual void process(const AudioBus* source, AudioBus* destination, size_t framesToProcess);
+    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.