diff -r 000000000000 -r 6474c204b198 layout/tools/layout-debug/src/nsLayoutDebugCLH.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/layout/tools/layout-debug/src/nsLayoutDebugCLH.h	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,27 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+// vim:cindent:tabstop=4:expandtab:shiftwidth=4:
+/* 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 nsLayoutDebugCLH_h_
+#define nsLayoutDebugCLH_h_
+
+#include "nsICommandLineHandler.h"
+#define ICOMMANDLINEHANDLER nsICommandLineHandler
+
+#define NS_LAYOUTDEBUGCLH_CID \
+ { 0xa8f52633, 0x5ecf, 0x424a, \
+   { 0xa1, 0x47, 0x47, 0xc3, 0x22, 0xf7, 0xbc, 0xe2 }}
+
+class nsLayoutDebugCLH : public ICOMMANDLINEHANDLER
+{
+public:
+    nsLayoutDebugCLH();
+    virtual ~nsLayoutDebugCLH();
+
+    NS_DECL_ISUPPORTS
+    NS_DECL_NSICOMMANDLINEHANDLER
+};
+
+#endif /* !defined(nsLayoutDebugCLH_h_) */