Fix virtual/override/final usage in Source/core/dom/.

Source/core/dom/DOMDataView.cpp

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "config.h"
 #include "core/dom/DOMDataView.h"
 
 #include "bindings/core/v8/DOMDataStore.h"
 #include "bindings/core/v8/V8ArrayBuffer.h"
 #include "bindings/core/v8/V8DOMWrapper.h"
@@ skipping 10 matching lines @@
     {
         RELEASE_ASSERT(byteOffset <= buffer->byteLength());
         CheckedInt<uint32_t> checkedOffset(byteOffset);
         CheckedInt<uint32_t> checkedLength(byteLength);
         CheckedInt<uint32_t> checkedMax = checkedOffset + checkedLength;
         RELEASE_ASSERT(checkedMax.isValid());
         RELEASE_ASSERT(checkedMax.value() <= buffer->byteLength());
         return adoptRef(new DataView(buffer, byteOffset, byteLength));
     }
 
-    virtual unsigned byteLength() const override { return m_byteLength; }
-    virtual ViewType type() const override { return TypeDataView; }
+    unsigned byteLength() const override { return m_byteLength; }
+    ViewType type() const override { return TypeDataView; }
 
 protected:
-    virtual void neuter() override
+    void neuter() override
     {
         ArrayBufferView::neuter();
         m_byteLength = 0;
     }
 
 private:
     DataView(PassRefPtr<ArrayBuffer> buffer, unsigned byteOffset, unsigned byteLength)
         : ArrayBufferView(buffer, byteOffset)
         , m_byteLength(byteLength) { }
 
@@ skipping 34 matching lines @@
 
     return associateWithWrapper(isolate, wrapperTypeInfo, wrapper);
 }
 
 v8::Local<v8::Object> DOMDataView::associateWithWrapper(v8::Isolate* isolate, const WrapperTypeInfo* wrapperTypeInfo, v8::Local<v8::Object> wrapper)
 {
     return V8DOMWrapper::associateObjectWithWrapper(isolate, this, wrapperTypeInfo, wrapper);
 }
 
 } // namespace blink