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

Source/wtf/Uint8ClampedArray.h

 /*
  * Copyright (C) 2009 Apple Inc. All rights reserved.
  * Copyright (C) 2009 Google Inc. All rights reserved.
  * Copyright (C) 2012 Nokia Corporation and/or its subsidiary(-ies).
  *
  * 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.
@@ skipping 24 matching lines @@
 
 class Uint8ClampedArray final : public Uint8Array {
 public:
     static inline PassRefPtr<Uint8ClampedArray> create(unsigned length);
     static inline PassRefPtr<Uint8ClampedArray> create(const unsigned char* array, unsigned length);
     static inline PassRefPtr<Uint8ClampedArray> create(PassRefPtr<ArrayBuffer>, unsigned byteOffset, unsigned length);
 
     using TypedArrayBase<unsigned char>::set;
     inline void set(unsigned index, double value);
 
-    virtual ViewType type() const override
+    ViewType type() const override
     {
         return TypeUint8Clamped;
     }
 
 private:
     inline Uint8ClampedArray(PassRefPtr<ArrayBuffer>,
                              unsigned byteOffset,
                              unsigned length);
     // Make constructor visible to superclass.
     friend class TypedArrayBase<unsigned char>;
@@ skipping 28 matching lines @@
 Uint8ClampedArray::Uint8ClampedArray(PassRefPtr<ArrayBuffer> buffer, unsigned byteOffset, unsigned length)
 : Uint8Array(buffer, byteOffset, length)
 {
 }
 
 } // namespace WTF
 
 using WTF::Uint8ClampedArray;
 
 #endif // Uint8ClampedArray_h