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diff --git a/src/core/custom_handlers/protocol_handler_registry_factory.h b/src/core/custom_handlers/protocol_handler_registry_factory.h
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+++ b/src/core/custom_handlers/protocol_handler_registry_factory.h
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+// Copyright (C) 2022 The Qt Company Ltd.
+// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only
+
+// based on chrome/browser/custom_handlers/protocol_handler_registry_factory.h:
+// 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 PROTOCOL_HANDLER_REGISTRY_FACTORY_H_
+#define PROTOCOL_HANDLER_REGISTRY_FACTORY_H_
+
+#include "components/keyed_service/content/browser_context_keyed_service_factory.h"
+
+namespace custom_handlers {
+class ProtocolHandlerRegistry;
+}
+
+namespace base {
+template <typename T> struct DefaultSingletonTraits;
+}
+
+namespace QtWebEngineCore {
+
+// Singleton that owns all ProtocolHandlerRegistrys and associates them with
+// Profiles. Listens for the Profile's destruction notification and cleans up
+// the associated ProtocolHandlerRegistry.
+class ProtocolHandlerRegistryFactory : public BrowserContextKeyedServiceFactory {
+public:
+    // Returns the singleton instance of the ProtocolHandlerRegistryFactory.
+    static ProtocolHandlerRegistryFactory *GetInstance();
+
+    // Returns the ProtocolHandlerRegistry that provides intent registration for
+    // |context|. Ownership stays with this factory object.
+    static custom_handlers::ProtocolHandlerRegistry *GetForBrowserContext(content::BrowserContext *context);
+
+    ProtocolHandlerRegistryFactory(const ProtocolHandlerRegistryFactory &) = delete;
+    ProtocolHandlerRegistryFactory &operator=(const ProtocolHandlerRegistryFactory &) = delete;
+
+protected:
+    // BrowserContextKeyedServiceFactory implementation.
+    bool ServiceIsCreatedWithBrowserContext() const override;
+    content::BrowserContext *GetBrowserContextToUse(content::BrowserContext *context) const override;
+    bool ServiceIsNULLWhileTesting() const override;
+
+private:
+    friend struct base::DefaultSingletonTraits<ProtocolHandlerRegistryFactory>;
+
+    ProtocolHandlerRegistryFactory();
+    ~ProtocolHandlerRegistryFactory() override;
+
+    // BrowserContextKeyedServiceFactory implementation.
+    KeyedService *BuildServiceInstanceFor(content::BrowserContext *profile) const override;
+};
+
+} // namespace QtWebEngineCore
+
+#endif  // PROTOCOL_HANDLER_REGISTRY_FACTORY_H_