Fix virtual/override/final usage in Source/modules/.

Source/modules/webaudio/ConvolverNode.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 22 matching lines @@
 
 namespace blink {
 
 class AudioBuffer;
 class ExceptionState;
 class Reverb;
 
 class MODULES_EXPORT ConvolverHandler final : public AudioHandler {
 public:
     static PassRefPtr<ConvolverHandler> create(AudioNode&, float sampleRate);
-    virtual ~ConvolverHandler();
+    ~ConvolverHandler() override;
 
     // AudioHandler
-    virtual void process(size_t framesToProcess) override;
+    void process(size_t framesToProcess) override;
 
     // Impulse responses
     void setBuffer(AudioBuffer*, ExceptionState&);
     AudioBuffer* buffer();
 
     bool normalize() const { return m_normalize; }
     void setNormalize(bool normalize) { m_normalize = normalize; }
 
 private:
     ConvolverHandler(AudioNode&, float sampleRate);
-    virtual double tailTime() const override;
-    virtual double latencyTime() const override;
+    double tailTime() const override;
+    double latencyTime() const override;
 
     OwnPtr<Reverb> m_reverb;
     // This Persistent doesn't make a reference cycle including the owner
     // ConvolverNode.
     Persistent<AudioBuffer> m_buffer;
 
     // This synchronizes dynamic changes to the convolution impulse response with process().
     mutable Mutex m_processLock;
 
     // Normalize the impulse response or not. Must default to true.
@@ skipping 17 matching lines @@
     ConvolverNode(AudioContext&, float sampleRate);
     ConvolverHandler& convolverHandler() const;
 
     // TODO(tkent): Use FRIEND_TEST macro provided by gtest_prod.h
     friend class ConvolverNodeTest_ReverbLifetime_Test;
 };
 
 } // namespace blink
 
 #endif // ConvolverNode_h