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diff --git a/src/webenginequick/api/qtwebenginequickglobal.cpp b/src/webenginequick/api/qtwebenginequickglobal.cpp
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+/****************************************************************************
+**
+** Copyright (C) 2016 The Qt Company Ltd.
+** Contact: https://www.qt.io/licensing/
+**
+** 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 The Qt Company. For licensing terms
+** and conditions see https://www.qt.io/terms-conditions. For further
+** information use the contact form at https://www.qt.io/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 3 as published by the Free Software
+** Foundation and appearing in the file LICENSE.LGPL3 included in the
+** packaging of this file. Please review the following information to
+** ensure the GNU Lesser General Public License version 3 requirements
+** will be met: https://www.gnu.org/licenses/lgpl-3.0.html.
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 2.0 or (at your option) the GNU General
+** Public license version 3 or any later version approved by the KDE Free
+** Qt Foundation. The licenses are as published by the Free Software
+** Foundation and appearing in the file LICENSE.GPL2 and LICENSE.GPL3
+** included in the packaging of this file. Please review the following
+** information to ensure the GNU General Public License requirements will
+** be met: https://www.gnu.org/licenses/gpl-2.0.html and
+** https://www.gnu.org/licenses/gpl-3.0.html.
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#include <QtWebEngineQuick/qtwebenginequickglobal.h>
+#include <QCoreApplication>
+#include <QQuickWindow>
+
+namespace QtWebEngineCore
+{
+    extern void initialize();
+}
+
+QT_BEGIN_NAMESPACE
+
+namespace QtWebEngineQuick {
+
+/*!
+    \namespace QtWebEngineQuick
+    \inmodule QtWebEngineQuick
+    \ingroup qtwebengine-namespaces
+    \keyword QtWebEngine Namespace
+
+    \brief Helper functions for the \QWE (Qt Quick) module.
+
+    The \l[CPP]{QtWebEngineQuick} namespace is part of the \QWE module.
+*/
+
+/*!
+    \fn QtWebEngineQuick::initialize()
+
+    Sets up an OpenGL Context that can be shared between threads. This has to be done before
+    QGuiApplication is created and before window's QPlatformOpenGLContext is created.
+
+    This has the same effect as setting the Qt::AA_ShareOpenGLContexts
+    attribute with QCoreApplication::setAttribute before constructing
+    QGuiApplication.
+*/
+void initialize()
+{
+    if (!QCoreApplication::startingUp()) {
+        qWarning("QtWebEngineQuick::initialize() called with QCoreApplication object already created and should be call before. "\
+                 "This is depreciated and may fail in the future.");
+        QtWebEngineCore::initialize();
+        return;
+    }
+    // call initialize the same way as widgets do
+    qAddPreRoutine(QtWebEngineCore::initialize);
+    QQuickWindow::setGraphicsApi(QSGRendererInterface::OpenGLRhi);
+}
+} // namespace QtWebEngineQuick
+
+QT_END_NAMESPACE