Oilpan: have Storage objects reside on the heap by default.

Source/modules/storage/Storage.h

 /*
  * Copyright (C) 2008 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 14 matching lines @@
 
 #ifndef Storage_h
 #define Storage_h
 
 #include "bindings/core/v8/ScriptWrappable.h"
 #include "bindings/core/v8/V8Binding.h"
 #include "core/frame/DOMWindowProperty.h"
 #include "modules/storage/StorageArea.h"
 #include "platform/heap/Handle.h"
 #include "wtf/Forward.h"
-#include "wtf/RefCounted.h"
 #include "wtf/RefPtr.h"
 
 namespace blink {
 
 class ExceptionState;
 class LocalFrame;
 
-class Storage final : public RefCountedWillBeGarbageCollected<Storage>, public ScriptWrappable, public DOMWindowProperty {
+class Storage final : public GarbageCollectedFinalized<Storage>, public ScriptWrappable, public DOMWindowProperty {
     DEFINE_WRAPPERTYPEINFO();
     WILL_BE_USING_GARBAGE_COLLECTED_MIXIN(Storage);
-    DECLARE_EMPTY_VIRTUAL_DESTRUCTOR_WILL_BE_REMOVED(Storage);
 public:
-    static PassRefPtrWillBeRawPtr<Storage> create(LocalFrame*, PassOwnPtrWillBeRawPtr<StorageArea>);
+    static Storage* create(LocalFrame*, StorageArea*);
+    virtual ~Storage();
 
     unsigned length(ExceptionState& ec) const { return m_storageArea->length(ec, m_frame); }
     String key(unsigned index, ExceptionState& ec) const { return m_storageArea->key(index, ec, m_frame); }
     String getItem(const String& key, ExceptionState& ec) const { return m_storageArea->getItem(key, ec, m_frame); }
     void setItem(const String& key, const String& value, ExceptionState& ec) { m_storageArea->setItem(key, value, ec, m_frame); }
     void removeItem(const String& key, ExceptionState& ec) { m_storageArea->removeItem(key, ec, m_frame); }
     void clear(ExceptionState& ec) { m_storageArea->clear(ec, m_frame); }
     bool contains(const String& key, ExceptionState& ec) const { return m_storageArea->contains(key, ec, m_frame); }
 
     StorageArea* area() const { return m_storageArea.get(); }
 
     String anonymousIndexedGetter(unsigned, ExceptionState&);
     String anonymousNamedGetter(const AtomicString&, ExceptionState&);
     bool anonymousNamedSetter(const AtomicString& name, const AtomicString& value, ExceptionState&);
     bool anonymousIndexedSetter(unsigned, const AtomicString&, ExceptionState&);
     DeleteResult anonymousNamedDeleter(const AtomicString&, ExceptionState&);
     DeleteResult anonymousIndexedDeleter(unsigned, ExceptionState&);
     void namedPropertyEnumerator(Vector<String>&, ExceptionState&);
     bool namedPropertyQuery(const AtomicString&, ExceptionState&);
 
     DECLARE_VIRTUAL_TRACE();
 
 private:
-    Storage(LocalFrame*, PassOwnPtrWillBeRawPtr<StorageArea>);
+    Storage(LocalFrame*, StorageArea*);
 
-    OwnPtrWillBeMember<StorageArea> m_storageArea;
+    Member<StorageArea> m_storageArea;
 };
 
 } // namespace blink
 
 #endif // Storage_h