Devirtualize several inspector classes destructors

Source/core/inspector/InspectorStyleSheet.h

 /*
  * 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
  *     notice, this list of conditions and the following disclaimer in the
@@ skipping 114 matching lines @@
     bool hasRawText() const { return !rawText.isEmpty(); }
 
     CSSPropertySourceData sourceData;
     bool hasSource;
     String rawText;
 };
 
 class InspectorStyle : public RefCounted<InspectorStyle> {
 public:
     static PassRefPtr<InspectorStyle> create(const InspectorCSSId& styleId, PassRefPtr<CSSStyleDeclaration> style, InspectorStyleSheet* parentStyleSheet);
-    virtual ~InspectorStyle();
 
     CSSStyleDeclaration* cssStyle() const { return m_style.get(); }
     PassRefPtr<TypeBuilder::CSS::CSSStyle> buildObjectForStyle() const;
     PassRefPtr<TypeBuilder::Array<TypeBuilder::CSS::CSSComputedStyleProperty> > buildArrayForComputedStyle() const;
     bool setPropertyText(unsigned index, const String& text, bool overwrite, String* oldText, ExceptionState&);
     bool toggleProperty(unsigned index, bool disable, ExceptionState&);
     bool styleText(String* result) const;
 
 private:
     InspectorStyle(const InspectorCSSId& styleId, PassRefPtr<CSSStyleDeclaration> style, InspectorStyleSheet* parentStyleSheet);
@@ skipping 146 matching lines @@
 
     // Contains "style" attribute value.
     mutable String m_styleText;
     mutable bool m_isStyleTextValid;
 };
 
 
 } // namespace WebCore
 
 #endif // !defined(InspectorStyleSheet_h)