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

Source/wtf/Int16Array.h

 /*
  * Copyright (C) 2009 Apple 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 23 matching lines @@
 
 class Int16Array final : public IntegralTypedArrayBase<short> {
 public:
     static inline PassRefPtr<Int16Array> create(unsigned length);
     static inline PassRefPtr<Int16Array> create(const short* array, unsigned length);
     static inline PassRefPtr<Int16Array> create(PassRefPtr<ArrayBuffer>, unsigned byteOffset, unsigned length);
 
     using TypedArrayBase<short>::set;
     using IntegralTypedArrayBase<short>::set;
 
-    virtual ViewType type() const override
+    ViewType type() const override
     {
         return TypeInt16;
     }
 
 private:
     inline Int16Array(PassRefPtr<ArrayBuffer>,
                     unsigned byteOffset,
                     unsigned length);
     // Make constructor visible to superclass.
     friend class TypedArrayBase<short>;
@@ skipping 17 matching lines @@
 Int16Array::Int16Array(PassRefPtr<ArrayBuffer> buffer, unsigned byteOffset, unsigned length)
     : IntegralTypedArrayBase<short>(buffer, byteOffset, length)
 {
 }
 
 } // namespace WTF
 
 using WTF::Int16Array;
 
 #endif // Int16Array_h