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diff --git a/src/core/printing_message_filter_qt.h b/src/core/printing_message_filter_qt.h
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+/****************************************************************************
+**
+** Copyright (C) 2016 The Qt Company Ltd.
+** Contact: http://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 http://www.qt.io/terms-conditions. For further
+** information use the contact form at http://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.LGPLv3 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.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 later 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 2.0 requirements will be
+** met: http://www.gnu.org/licenses/gpl-2.0.html.
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+// Copyright (c) 2012 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef PRINTING_PRINTING_MESSAGE_FILTER_QT_H_
+#define PRINTING_PRINTING_MESSAGE_FILTER_QT_H_
+
+#include <string>
+
+#include "base/compiler_specific.h"
+#include "base/prefs/pref_member.h"
+#include "content/public/browser/browser_message_filter.h"
+
+#if defined(OS_WIN)
+#include "base/memory/shared_memory.h"
+#endif
+
+struct PrintHostMsg_ScriptedPrint_Params;
+
+namespace base {
+class DictionaryValue;
+class FilePath;
+}
+
+namespace content {
+class WebContents;
+}
+
+namespace printing {
+
+class PrintJobManager;
+class PrintQueriesQueue;
+class PrinterQuery;
+}
+
+namespace QtWebEngineCore {
+// This class filters out incoming printing related IPC messages for the
+// renderer process on the IPC thread.
+class PrintingMessageFilterQt : public content::BrowserMessageFilter {
+ public:
+  PrintingMessageFilterQt(int render_process_id);
+
+  // content::BrowserMessageFilter methods.
+  void OverrideThreadForMessage(const IPC::Message& message,
+                                content::BrowserThread::ID* thread) override;
+  bool OnMessageReceived(const IPC::Message& message) override;
+
+ private:
+  ~PrintingMessageFilterQt() override;
+
+#if defined(OS_WIN)
+  // Used to pass resulting EMF from renderer to browser in printing.
+  void OnDuplicateSection(base::SharedMemoryHandle renderer_handle,
+                          base::SharedMemoryHandle* browser_handle);
+#endif
+
+  // GetPrintSettingsForRenderView must be called via PostTask and
+  // base::Bind.  Collapse the settings-specific params into a
+  // struct to avoid running into issues with too many params
+  // to base::Bind.
+  struct GetPrintSettingsForRenderViewParams;
+
+  // Checks if printing is enabled.
+  void OnIsPrintingEnabled(bool* is_enabled);
+
+  // Get the default print setting.
+  void OnGetDefaultPrintSettings(IPC::Message* reply_msg);
+  void OnGetDefaultPrintSettingsReply(scoped_refptr<printing::PrinterQuery> printer_query,
+                                      IPC::Message* reply_msg);
+
+  // The renderer host have to show to the user the print dialog and returns
+  // the selected print settings. The task is handled by the print worker
+  // thread and the UI thread. The reply occurs on the IO thread.
+  void OnScriptedPrint(const PrintHostMsg_ScriptedPrint_Params& params,
+                       IPC::Message* reply_msg);
+  void OnScriptedPrintReply(scoped_refptr<printing::PrinterQuery> printer_query,
+                            IPC::Message* reply_msg);
+
+  // Modify the current print settings based on |job_settings|. The task is
+  // handled by the print worker thread and the UI thread. The reply occurs on
+  // the IO thread.
+  void OnUpdatePrintSettings(int document_cookie,
+                             const base::DictionaryValue& job_settings,
+                             IPC::Message* reply_msg);
+  void OnUpdatePrintSettingsReply(scoped_refptr<printing::PrinterQuery> printer_query,
+                                  IPC::Message* reply_msg);
+
+  // Check to see if print preview has been cancelled.
+  void OnCheckForCancel(int32_t preview_ui_id,
+                        int preview_request_id,
+                        bool* cancel);
+
+  const int render_process_id_;
+
+  scoped_refptr<printing::PrintQueriesQueue> queue_;
+
+  DISALLOW_COPY_AND_ASSIGN(PrintingMessageFilterQt);
+};
+
+}  // namespace printing
+
+#endif  // PRINTING_PRINTING_MESSAGE_FILTER_QT_H_