Remove SpeechSynthesisVoice's virtual destructor

Source/modules/speech/SpeechSynthesisVoice.h

 /*
  * Copyright (C) 2013 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 18 matching lines @@
 #include "bindings/v8/ScriptWrappable.h"
 #include "core/platform/PlatformSpeechSynthesisVoice.h"
 #include "wtf/PassRefPtr.h"
 #include "wtf/RefCounted.h"
 #include "wtf/text/WTFString.h"
 
 namespace WebCore {
 
 class SpeechSynthesisVoice : public ScriptWrappable, public RefCounted<SpeechSynthesisVoice> {
 public:
-    virtual ~SpeechSynthesisVoice() { }
     static PassRefPtr<SpeechSynthesisVoice> create(PassRefPtr<PlatformSpeechSynthesisVoice>);
 
     const String& voiceURI() const { return m_platformVoice->voiceURI(); }
     const String& name() const { return m_platformVoice->name(); }
     const String& lang() const { return m_platformVoice->lang(); }
     bool localService() const { return m_platformVoice->localService(); }
     bool isDefault() const { return m_platformVoice->isDefault(); }
 
     PlatformSpeechSynthesisVoice* platformVoice() const { return m_platformVoice.get(); }
 
 private:
     explicit SpeechSynthesisVoice(PassRefPtr<PlatformSpeechSynthesisVoice>);
 
     RefPtr<PlatformSpeechSynthesisVoice> m_platformVoice;
 };
 
 } // namespace WebCore
 
 #endif // SpeechSynthesisVoice_h