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diff --git a/src/plugins/cpptools/stringtable.h b/src/plugins/cpptools/stringtable.h
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+/****************************************************************************
+**
+** Copyright (C) 2014 Digia Plc and/or its subsidiary(-ies).
+** Contact: http://www.qt-project.org/legal
+**
+** This file is part of Qt Creator.
+**
+** Commercial License Usage
+** Licensees holding valid commercial Qt licenses may use this file in
+** accordance with the commercial license agreement provided with the
+** Software or, alternatively, in accordance with the terms contained in
+** a written agreement between you and Digia.  For licensing terms and
+** conditions see http://qt.digia.com/licensing.  For further information
+** use the contact form at http://qt.digia.com/contact-us.
+**
+** GNU Lesser General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU Lesser
+** General Public License version 2.1 as published by the Free Software
+** Foundation and appearing in the file LICENSE.LGPL included in the
+** packaging of this file.  Please review the following information to
+** ensure the GNU Lesser General Public License version 2.1 requirements
+** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
+**
+** In addition, as a special exception, Digia gives you certain additional
+** rights.  These rights are described in the Digia Qt LGPL Exception
+** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
+**
+****************************************************************************/
+
+#ifndef STRINGTABLE_H
+#define STRINGTABLE_H
+
+#include <QAtomicInt>
+#include <QMutex>
+#include <QObject>
+#include <QRunnable>
+#include <QSet>
+#include <QTimer>
+
+namespace CppTools {
+namespace Internal {
+
+class StringTable: public QObject
+{
+    Q_OBJECT
+
+public:
+    StringTable();
+
+    QString insert(const QString &string);
+    void scheduleGC();
+
+private slots:
+    void startGC();
+
+private:
+    void GC();
+    class GCRunner: public QRunnable {
+        StringTable &m_stringTable;
+
+    public:
+        GCRunner(StringTable &stringTable): m_stringTable(stringTable) {}
+        virtual void run() { m_stringTable.GC(); }
+    } m_gcRunner;
+    friend class GCRunner;
+
+private:
+    mutable QMutex m_lock;
+    QAtomicInt m_stopGCRequested;
+    QSet<QString> m_strings;
+    QTimer m_gcCountDown;
+};
+
+} // Internal namespace
+} // CppTools namespace
+
+#endif // STRINGTABLE_H