[oilpan] Resurrect a loop-back persistent handle in RefCountedHeapAllocated

Source/core/css/StyleRule.h

 /*
  * (C) 1999-2003 Lars Knoll (knoll@kde.org)
  * (C) 2002-2003 Dirk Mueller (mueller@kde.org)
  * Copyright (C) 2002, 2006, 2008, 2012 Apple Inc. All rights reserved.
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Library General Public
  * License as published by the Free Software Foundation; either
  * version 2 of the License, or (at your option) any later version.
  *
@@ skipping 58 matching lines @@
     bool isViewportRule() const { return type() == Viewport; }
 #endif
     bool isImportRule() const { return type() == Import; }
     bool isHostRule() const { return type() == HostInternal; }
     bool isFilterRule() const { return type() == Filter; }
 
     PassRefPtr<StyleRuleBase> copy() const;
 
     int sourceLine() const { return m_sourceLine; }
 
+    void ref()
+    {
+        refBase();
+    }
+
     void deref()
     {
         if (derefBase())
             destroy();
     }
 
     // FIXME: There shouldn't be any need for the null parent version.
     PassRefPtr<CSSRule> createCSSOMWrapper(CSSStyleSheet* parentSheet = 0) const;
     PassRefPtr<CSSRule> createCSSOMWrapper(CSSRule* parentRule) const;
 
@@ skipping 243 matching lines @@
     StyleRuleFilter(const String&);
     StyleRuleFilter(const StyleRuleFilter&);
 
     String m_filterName;
     RefPtr<StylePropertySet> m_properties;
 };
 
 } // namespace WebCore
 
 #endif // StyleRule_h