--- /dev/null
+// Copyright (c) 2015 The Chromium Embedded Framework 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 CEF_TESTS_CEFCLIENT_BROWSER_CLIENT_TYPES_H_
+#define CEF_TESTS_CEFCLIENT_BROWSER_CLIENT_TYPES_H_
+#pragma once
+
+#include "include/cef_base.h"
+
+#if defined(OS_LINUX)
+#include <gtk/gtk.h>
+
+// The Linux client uses GTK instead of the underlying platform type (X11).
+#define ClientWindowHandle GtkWidget*
+#else
+#define ClientWindowHandle CefWindowHandle
+#endif
+
+#if defined(OS_MACOSX)
+// Forward declaration of ObjC types used by cefclient and not provided by
+// include/internal/cef_types_mac.h.
+#ifdef __cplusplus
+#ifdef __OBJC__
+@class NSWindow;
+#else
+class NSWindow;
+#endif
+#endif
+#endif // defined OS_MACOSX
+
+#endif // CEF_TESTS_CEFCLIENT_BROWSER_CLIENT_TYPES_H_
+