Oilpan: move mutation observers to the Oilpan heap.

Source/core/dom/MutationObserverRegistration.h

 /*
  * Copyright (C) 2011 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:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 14 matching lines @@
  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
 #ifndef MutationObserverRegistration_h
 #define MutationObserverRegistration_h
 
 #include "core/dom/MutationObserver.h"
+#include "platform/heap/Handle.h"
 #include "wtf/HashSet.h"
 #include "wtf/text/AtomicString.h"
 #include "wtf/text/AtomicStringHash.h"
 
 namespace WebCore {
 
 class QualifiedName;
 
-class MutationObserverRegistration {
+class MutationObserverRegistration FINAL : public NoBaseWillBeGarbageCollectedFinalized<MutationObserverRegistration> {
 public:
-    static PassOwnPtr<MutationObserverRegistration> create(MutationObserver&, Node&, MutationObserverOptions, const HashSet<AtomicString>& attributeFilter);
+    static PassOwnPtrWillBeRawPtr<MutationObserverRegistration> create(MutationObserver&, Node&, MutationObserverOptions, const HashSet<AtomicString>& attributeFilter);
     ~MutationObserverRegistration();
 
     void resetObservation(MutationObserverOptions, const HashSet<AtomicString>& attributeFilter);
     void observedSubtreeNodeWillDetach(Node&);
     void clearTransientRegistrations();
     bool hasTransientRegistrations() const { return m_transientRegistrationNodes && !m_transientRegistrationNodes->isEmpty(); }
     void unregister();
 
     bool shouldReceiveMutationFrom(Node&, MutationObserver::MutationType, const QualifiedName* attributeName) const;
     bool isSubtree() const { return m_options & MutationObserver::Subtree; }
 
     MutationObserver& observer() const { return *m_observer; }
     MutationRecordDeliveryOptions deliveryOptions() const { return m_options & (MutationObserver::AttributeOldValue | MutationObserver::CharacterDataOldValue); }
     MutationObserverOptions mutationTypes() const { return m_options & MutationObserver::AllMutationTypes; }
 
     void addRegistrationNodesToSet(HashSet<Node*>&) const;
 
+    void trace(Visitor*);
+
+    void dispose();
+
 private:
     MutationObserverRegistration(MutationObserver&, Node&, MutationObserverOptions, const HashSet<AtomicString>& attributeFilter);
 
-    RefPtr<MutationObserver> m_observer;
+    RefPtrWillBeMember<MutationObserver> m_observer;
     Node& m_registrationNode;
     RefPtr<Node> m_registrationNodeKeepAlive;
     typedef HashSet<RefPtr<Node> > NodeHashSet;
     OwnPtr<NodeHashSet> m_transientRegistrationNodes;
 
     MutationObserverOptions m_options;
     HashSet<AtomicString> m_attributeFilter;
 };
 
 } // namespace WebCore
 
 #endif // MutationObserverRegistration_h