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diff --git a/src/core/net/proxy_config_monitor.h b/src/core/net/proxy_config_monitor.h
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+/****************************************************************************
+**
+** Copyright (C) 2019 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.
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+// originally based on chrome/browser/net/proxy_config_monitor.h
+// Copyright 2017 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 PROXY_CONFIG_MONITOR_H
+#define PROXY_CONFIG_MONITOR_H
+
+#include <memory>
+#include <string>
+
+#include "base/macros.h"
+#include "build/buildflag.h"
+#include "extensions/buildflags/buildflags.h"
+#include "mojo/public/cpp/bindings/binding_set.h"
+#include "mojo/public/cpp/bindings/interface_ptr_set.h"
+#include "net/proxy_resolution/proxy_config_service.h"
+#include "services/network/public/mojom/network_context.mojom-forward.h"
+#include "services/network/public/mojom/network_service.mojom-forward.h"
+#include "services/network/public/mojom/proxy_config.mojom-forward.h"
+#include "services/network/public/mojom/proxy_config_with_annotation.mojom.h"
+
+namespace net {
+class ProxyConfigWithAnnotation;
+}
+
+class PrefService;
+class ProxyConfigServiceQt;
+
+// Tracks the ProxyConfig to use, and passes any updates to a NetworkContext's
+// ProxyConfigClient. This also responds to errors related to proxy settings
+// from the NetworkContext, and forwards them any listening Chrome extensions
+// associated with the profile.
+class ProxyConfigMonitor : public net::ProxyConfigService::Observer,
+                           public network::mojom::ProxyConfigPollerClient
+{
+public:
+    explicit ProxyConfigMonitor(PrefService *prefs = nullptr);
+
+    ~ProxyConfigMonitor() override;
+
+    // Populates proxy-related fields of |network_context_params|. Updated
+    // ProxyConfigs will be sent to a NetworkContext created with those params
+    // whenever the configuration changes. Can be called more than once to inform
+    // multiple NetworkContexts of proxy changes.
+    void AddToNetworkContextParams(network::mojom::NetworkContextParams *network_context_params);
+
+private:
+    // net::ProxyConfigService::Observer implementation:
+    void OnProxyConfigChanged(const net::ProxyConfigWithAnnotation &config,
+                              net::ProxyConfigService::ConfigAvailability availability) override;
+
+    // network::mojom::ProxyConfigPollerClient implementation:
+    void OnLazyProxyConfigPoll() override;
+
+    std::unique_ptr<ProxyConfigServiceQt> proxy_config_service_;
+
+    mojo::BindingSet<network::mojom::ProxyConfigPollerClient> poller_binding_set_;
+
+    mojo::InterfacePtrSet<network::mojom::ProxyConfigClient> proxy_config_client_set_;
+
+    DISALLOW_COPY_AND_ASSIGN(ProxyConfigMonitor);
+};
+
+#endif // !PROXY_CONFIG_MONITOR_H