diff -r 000000000000 -r 6474c204b198 xpcom/base/Debug.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/xpcom/base/Debug.h	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,20 @@
+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 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 mozilla_Debug_h__
+#define mozilla_Debug_h__
+
+namespace mozilla {
+
+#ifdef XP_WIN
+
+// Print aStr to a debugger if the debugger is attached.
+void PrintToDebugger(const char* aStr);
+
+#endif
+
+} // namespace mozilla
+
+#endif // mozilla_Debug_h__