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diff --git a/src/core/printing/pdf_web_contents_helper_client_qt.h b/src/core/printing/pdf_web_contents_helper_client_qt.h
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+++ b/src/core/printing/pdf_web_contents_helper_client_qt.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
+
+#ifndef PDF_WEB_CONTENTS_HELPER_CLIENT_QT_H
+#define PDF_WEB_CONTENTS_HELPER_CLIENT_QT_H
+
+#include "components/pdf/browser/pdf_web_contents_helper_client.h"
+
+// based on chrome/browser/ui/pdf/chrome_pdf_web_contents_helper_client.h:
+class PDFWebContentsHelperClientQt : public pdf::PDFWebContentsHelperClient
+{
+public:
+    PDFWebContentsHelperClientQt();
+    PDFWebContentsHelperClientQt(const PDFWebContentsHelperClientQt&) = delete;
+    PDFWebContentsHelperClientQt& operator=(const PDFWebContentsHelperClientQt&) = delete;
+    ~PDFWebContentsHelperClientQt() override;
+
+private:
+    // pdf::PDFWebContentsHelperClient:
+    content::RenderFrameHost* FindPdfFrame(content::WebContents *contents) override;
+    void UpdateContentRestrictions(content::WebContents *contents, int content_restrictions) override {}
+    void OnPDFHasUnsupportedFeature(content::WebContents *contents) override {}
+    void OnSaveURL(content::WebContents *contents) override {}
+    void SetPluginCanSave(content::WebContents *contents, bool can_save) override;
+};
+
+#endif // PDF_WEB_CONTENTS_HELPER_CLIENT_QT_H