Oilpan: move HistoryItem to the heap.

Source/core/loader/HistoryItem.h

 /*
  * Copyright (C) 2006, 2008, 2011 Apple Inc. All rights reserved.
  * Copyright (C) 2012 Research In Motion Limited. 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 12 matching lines @@
  * (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 HistoryItem_h
 #define HistoryItem_h
 
 #include "bindings/core/v8/SerializedScriptValue.h"
 #include "platform/geometry/FloatPoint.h"
 #include "platform/geometry/IntPoint.h"
+#include "platform/heap/Handle.h"
 #include "platform/weborigin/Referrer.h"
 #include "wtf/RefCounted.h"
 #include "wtf/text/WTFString.h"
 
 namespace blink {
 
 class Document;
 class DocumentState;
 class FormData;
-class HistoryItem;
 class KURL;
 class ResourceRequest;
 
-typedef Vector<RefPtr<HistoryItem> > HistoryItemVector;
-
-class HistoryItem : public RefCounted<HistoryItem> {
+class HistoryItem final : public RefCountedWillBeGarbageCollectedFinalized<HistoryItem> {
 public:
-    static PassRefPtr<HistoryItem> create() { return adoptRef(new HistoryItem); }
+    static PassRefPtrWillBeRawPtr<HistoryItem> create()
+    {
+        return adoptRefWillBeNoop(new HistoryItem);
+    }
     ~HistoryItem();
 
     // Used when the frame this item represents was navigated to a different
     // url but a new item wasn't created.
     void generateNewItemSequenceNumber();
     void generateNewDocumentSequenceNumber();
 
     const String& urlString() const;
     KURL url() const;
 
@@ skipping 34 matching lines @@
 
     void setFrameSequenceNumber(long long number) { m_frameSequenceNumber = number; }
     long long frameSequenceNumber() const { return m_frameSequenceNumber; }
 
     void setFormInfoFromRequest(const ResourceRequest&);
     void setFormData(PassRefPtr<FormData>);
     void setFormContentType(const AtomicString&);
 
     bool isCurrentDocument(Document*) const;
 
+    void trace(Visitor*);
+
 private:
     HistoryItem();
 
     String m_urlString;
     Referrer m_referrer;
     String m_target;
 
     FloatPoint m_pinchViewportScrollPoint;
     IntPoint m_scrollPoint;
     float m_pageScaleFactor;
     Vector<String> m_documentStateVector;
-    RefPtrWillBePersistent<DocumentState> m_documentState;
+    RefPtrWillBeMember<DocumentState> m_documentState;
 
     // If two HistoryItems have the same item sequence number, then they are
     // clones of one another. Traversing history from one such HistoryItem to
     // another is a no-op. HistoryItem clones are created for parent and
     // sibling frames when only a subframe navigates.
     int64_t m_itemSequenceNumber;
 
     // If two HistoryItems have the same document sequence number, then they
     // refer to the same instance of a document. Traversing history from one
     // such HistoryItem to another preserves the document.
@@ skipping 10 matching lines @@
 
     // info used to repost form data
     RefPtr<FormData> m_formData;
     AtomicString m_formContentType;
 
 }; // class HistoryItem
 
 } // namespace blink
 
 #endif // HISTORYITEM_H