Oilpan: fix build after r183972.

Source/core/dom/DOMArrayBufferView.h

 // 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.
 
 #ifndef DOMArrayBufferView_h
 #define DOMArrayBufferView_h
 
 #include "bindings/core/v8/ScriptWrappable.h"
 #include "core/dom/DOMArrayBuffer.h"
 #include "wtf/ArrayBufferView.h"
 #include "wtf/RefCounted.h"
 
 namespace blink {
 
 class DOMArrayBufferView : public RefCounted<DOMArrayBufferView>, public ScriptWrappable {
     DEFINE_WRAPPERTYPEINFO();
 public:
+    virtual ~DOMArrayBufferView() { }
+
     PassRefPtr<DOMArrayBuffer> buffer() const
     {
         if (!m_domArrayBuffer)
             m_domArrayBuffer = DOMArrayBuffer::create(view()->buffer());
         return m_domArrayBuffer;
     }
 
     const WTF::ArrayBufferView* view() const { return m_bufferView.get(); }
     WTF::ArrayBufferView* view() { return m_bufferView.get(); }
 
@@ skipping 28 matching lines @@
     }
 
 private:
     RefPtr<WTF::ArrayBufferView> m_bufferView;
     mutable RefPtr<DOMArrayBuffer> m_domArrayBuffer;
 };
 
 } // namespace blink
 
 #endif // DOMArrayBufferView_h