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diff --git a/src/core/delegated_frame_node.h b/src/core/delegated_frame_node.h
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+/****************************************************************************
+**
+** Copyright (C) 2013 Digia Plc and/or its subsidiary(-ies).
+** Contact: http://www.qt-project.org/legal
+**
+** This file is part of the QtWebEngine module of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** 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.
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 3.0 as published by the Free Software
+** Foundation and appearing in the file LICENSE.GPL included in the
+** packaging of this file.  Please review the following information to
+** ensure the GNU General Public License version 3.0 requirements will be
+** met: http://www.gnu.org/copyleft/gpl.html.
+**
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#ifndef DELEGATED_FRAME_NODE_H
+#define DELEGATED_FRAME_NODE_H
+
+#include "cc/resources/transferable_resource.h"
+#include <QMutex>
+#include <QSGNode>
+#include <QSharedPointer>
+#include <QWaitCondition>
+
+#if (QT_VERSION >= QT_VERSION_CHECK(5, 2, 0))
+
+QT_BEGIN_NAMESPACE
+class QQuickWindow;
+QT_END_NAMESPACE
+
+namespace cc {
+class DelegatedFrameData;
+}
+
+class MailboxTexture;
+class RenderPassTexture;
+
+class DelegatedFrameNode : public QSGNode {
+public:
+    DelegatedFrameNode(QQuickWindow *window);
+    ~DelegatedFrameNode();
+    void preprocess();
+    void commit(cc::DelegatedFrameData *frameData, cc::TransferableResourceArray *resourcesToRelease);
+
+private:
+    QQuickWindow *m_window;
+    QList<QSharedPointer<RenderPassTexture> > m_renderPassTextures;
+    QMap<int, QSharedPointer<MailboxTexture> > m_mailboxTextures;
+    int m_numPendingSyncPoints;
+    QWaitCondition m_mailboxesFetchedWaitCond;
+    QMutex m_mutex;
+
+    // Making those callbacks static bypasses base::Bind's ref-counting requirement
+    // of the this pointer when the callback is a method.
+    static void fetchTexturesAndUnlockQt(DelegatedFrameNode *frameNode, QList<MailboxTexture *> *mailboxesToFetch);
+    static void syncPointRetired(DelegatedFrameNode *frameNode, QList<MailboxTexture *> *mailboxesToFetch);
+};
+
+#endif // QT_VERSION
+
+#endif // DELEGATED_FRAME_NODE_H