Revert of Oilpan: Move CSSStyleDeclaration and subclasses to the heap using transistion types.

Source/core/css/CSSKeyframeRule.cpp

 /*
  * Copyright (C) 2007, 2008, 2012 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 128 matching lines @@
 
 CSSKeyframeRule::CSSKeyframeRule(StyleKeyframe* keyframe, CSSKeyframesRule* parent)
     : CSSRule(0)
     , m_keyframe(keyframe)
 {
     setParentRule(parent);
 }
 
 CSSKeyframeRule::~CSSKeyframeRule()
 {
-#if !ENABLE(OILPAN)
     if (m_propertiesCSSOMWrapper)
         m_propertiesCSSOMWrapper->clearParentRule();
-#endif
 }
 
 CSSStyleDeclaration* CSSKeyframeRule::style() const
 {
     if (!m_propertiesCSSOMWrapper)
         m_propertiesCSSOMWrapper = StyleRuleCSSStyleDeclaration::create(m_keyframe->mutableProperties(), const_cast<CSSKeyframeRule*>(this));
     return m_propertiesCSSOMWrapper.get();
 }
 
 void CSSKeyframeRule::reattach(StyleRuleBase*)
 {
     // No need to reattach, the underlying data is shareable on mutation.
     ASSERT_NOT_REACHED();
 }
 
-void CSSKeyframeRule::trace(Visitor* visitor)
-{
-    visitor->trace(m_propertiesCSSOMWrapper);
-    CSSRule::trace(visitor);
-}
-
 } // namespace WebCore