Move ScopedStyleResolver and ScopedStyleTree to oilpan's heap

Source/core/dom/TreeScope.h

 /*
  * Copyright (C) 2011 Google Inc. All Rights Reserved.
  * Copyright (C) 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
@@ skipping 172 matching lines @@
 #if !ENABLE(OILPAN)
     int m_guardRefCount;
 #endif
 
     OwnPtrWillBeMember<DocumentOrderedMap> m_elementsById;
     OwnPtrWillBeMember<DocumentOrderedMap> m_imageMapsByName;
     OwnPtrWillBeMember<DocumentOrderedMap> m_labelsByForAttribute;
 
     OwnPtrWillBeMember<IdTargetObserverRegistry> m_idTargetObserverRegistry;
 
-    OwnPtr<ScopedStyleResolver> m_scopedStyleResolver;
+    OwnPtrWillBeMember<ScopedStyleResolver> m_scopedStyleResolver;
 
     mutable RefPtrWillBeMember<DOMSelection> m_selection;
 };
 
 inline bool TreeScope::hasElementWithId(StringImpl* id) const
 {
     ASSERT(id);
     return m_elementsById && m_elementsById->contains(id);
 }
 
 inline bool TreeScope::containsMultipleElementsWithId(const AtomicString& id) const
 {
     return m_elementsById && m_elementsById->containsMultiple(id.impl());
 }
 
 DEFINE_COMPARISON_OPERATORS_WITH_REFERENCES(TreeScope)
 
 HitTestResult hitTestInDocument(const Document*, int x, int y);
 TreeScope* commonTreeScope(Node*, Node*);
 
 } // namespace blink
 
 #endif // TreeScope_h