Oilpan: Add support of pre-finalization callback to Oilpan infrastructure.

Source/modules/indexeddb/IDBCursor.h

Index: Source/modules/indexeddb/IDBCursor.h
diff --git a/Source/modules/indexeddb/IDBCursor.h b/Source/modules/indexeddb/IDBCursor.h
index 02af5b86315facc9fdce56ddeff889ca9e151b30..28f96b8a22f55203788954e20716ee7c07e3e853 100644
--- a/Source/modules/indexeddb/IDBCursor.h
+++ b/Source/modules/indexeddb/IDBCursor.h
@@ -47,12 +47,12 @@ class WebBlobInfo;
 
 class IDBCursor : public GarbageCollectedFinalized<IDBCursor>, public ScriptWrappable {
     DEFINE_WRAPPERTYPEINFO();
+    USING_PRE_FINALIZER(IDBCursor, dispose);
 public:
     static WebIDBCursorDirection stringToDirection(const String& modeString, ExceptionState&);
 
     static IDBCursor* create(PassOwnPtr<WebIDBCursor>, WebIDBCursorDirection, IDBRequest*, IDBAny* source, IDBTransaction*);
     virtual ~IDBCursor();
-    void dispose();
     void trace(Visitor*);
     void contextWillBeDestroyed() { m_backend.clear(); }
 
@@ -87,6 +87,7 @@ protected:
     IDBCursor(PassOwnPtr<WebIDBCursor>, WebIDBCursorDirection, IDBRequest*, IDBAny* source, IDBTransaction*);
 
 private:
+    void dispose();
     IDBObjectStore* effectiveObjectStore() const;
     void handleBlobAcks();