Oilpan: Move CSSTimingData back to off-heap

Source/core/rendering/style/StyleRareNonInheritedData.h

 /*
  * Copyright (C) 2000 Lars Knoll (knoll@kde.org)
  *           (C) 2000 Antti Koivisto (koivisto@kde.org)
  *           (C) 2000 Dirk Mueller (mueller@kde.org)
  * Copyright (C) 2003, 2005, 2006, 2007, 2008 Apple Inc. All rights reserved.
  * Copyright (C) 2006 Graham Dennis (graham.dennis@gmail.com)
  *
  * 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
@@ skipping 99 matching lines @@
     DataRef<StyleGridData> m_grid;
     DataRef<StyleGridItemData> m_gridItem;
 
     OwnPtr<ContentData> m_content;
     OwnPtr<CounterDirectiveMap> m_counterDirectives;
 
     RefPtr<ShadowList> m_boxShadow;
 
     RefPtr<StyleReflection> m_boxReflect;
 
-    OwnPtrWillBePersistent<CSSAnimationData> m_animations;
-    OwnPtrWillBePersistent<CSSTransitionData> m_transitions;
+    OwnPtr<CSSAnimationData> m_animations;
+    OwnPtr<CSSTransitionData> m_transitions;
 
     FillLayer m_mask;
     NinePieceImage m_maskBoxImage;
 
     LengthSize m_pageSize;
 
     RefPtr<ShapeValue> m_shapeOutside;
     Length m_shapeMargin;
     float m_shapeImageThreshold;
 
@@ skipping 72 matching lines @@
     unsigned m_hasInlineTransform : 1;
 
 private:
     StyleRareNonInheritedData();
     StyleRareNonInheritedData(const StyleRareNonInheritedData&);
 };
 
 } // namespace blink
 
 #endif // StyleRareNonInheritedData_h