diff -r 000000000000 -r 6474c204b198 layout/tools/layout-debug/src/nsRegressionTester.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/layout/tools/layout-debug/src/nsRegressionTester.h	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,36 @@
+/* -*- Mode: IDL; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*-
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#ifndef nsRegressionTester_h__
+#define nsRegressionTester_h__
+
+#include "nsCOMPtr.h"
+
+#include "nsILayoutRegressionTester.h"  
+#include "nsILayoutDebugger.h"
+
+class nsIDOMWindow;
+class nsIDocShell;
+
+//*****************************************************************************
+//***    nsRegressionTester
+//*****************************************************************************
+class  nsRegressionTester : public nsILayoutRegressionTester
+{
+public:
+  NS_DECL_ISUPPORTS
+  NS_DECL_NSILAYOUTREGRESSIONTESTER
+
+  nsRegressionTester();
+  virtual ~nsRegressionTester();
+
+protected:
+  nsresult    GetDocShellFromWindow(nsIDOMWindow* inWindow, nsIDocShell** outShell);
+};
+
+
+
+#endif /* nsRegressionTester_h__ */