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diff --git a/Source/WebKit2/Shared/qt/CleanupHandler.h b/Source/WebKit2/Shared/qt/CleanupHandler.h
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+/*
+ * Copyright (C) 2010 University of Szeged. 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
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
+ * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 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 CleanupHandler_h
+#define CleanupHandler_h
+
+#include <QCoreApplication>
+#include <QList>
+#include <QObject>
+#include <wtf/HashSet.h>
+#include <wtf/StdLibExtras.h>
+
+namespace WebKit {
+
+class CleanupHandler : private QObject {
+    Q_OBJECT
+public:
+    static CleanupHandler* instance()
+    {
+        if (!theInstance)
+            theInstance = new CleanupHandler();
+        return theInstance;
+    }
+
+    void markForCleanup(QObject* object)
+    {
+        m_objects.append(object);
+    }
+
+    void unmark(QObject* object)
+    {
+        if (m_hasStartedDeleting)
+            return;
+        m_objects.removeOne(object);
+    }
+
+    bool hasStartedDeleting() const { return m_hasStartedDeleting; }
+
+private slots:
+    void deleteObjects();
+
+private:
+    static void sigTermHandler(int);
+    static CleanupHandler* theInstance;
+
+    CleanupHandler();
+
+    QList<QObject*> m_objects;
+    bool m_hasStartedDeleting;
+};
+
+} // namespace WebKit
+
+#endif // CleanupHandler_h