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

Source/wtf/TypedArrayBase.h

 /*
  * Copyright (C) 2010 Apple Inc. All rights reserved.
  * 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
@@ skipping 34 matching lines @@
     }
 
     // Overridden from ArrayBufferView. This must be public because of
     // rules about inheritance of members in template classes, and
     // because it is accessed via pointers to subclasses.
     unsigned length() const
     {
         return m_length;
     }
 
-    virtual unsigned byteLength() const override final
+    unsigned byteLength() const final
     {
         return m_length * sizeof(T);
     }
 
     // Invoked by the indexed getter. Does not perform range checks; caller
     // is responsible for doing so and returning undefined as necessary.
     T item(unsigned index) const
     {
         ASSERT_WITH_SECURITY_IMPLICATION(index < TypedArrayBase<T>::m_length);
         return TypedArrayBase<T>::data()[index];
@@ skipping 35 matching lines @@
 
     template <class Subclass>
     static PassRefPtr<Subclass> createOrNull(unsigned length)
     {
         RefPtr<ArrayBuffer> buffer = ArrayBuffer::createOrNull(length, sizeof(T));
         if (!buffer)
             return nullptr;
         return create<Subclass>(buffer.release(), 0, length);
     }
 
-    virtual void neuter() override final
+    void neuter() final
     {
         ArrayBufferView::neuter();
         m_length = 0;
     }
 
     // We do not want to have to access this via a virtual function in subclasses,
     // which is why it is protected rather than private.
     unsigned m_length;
 };
 
 } // namespace WTF
 
 using WTF::TypedArrayBase;
 
 #endif // TypedArrayBase_h