diff -r 000000000000 -r 6474c204b198 docshell/base/nsIContentViewerFile.idl
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/docshell/base/nsIContentViewerFile.idl	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,31 @@
+/* -*- 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/. */
+
+#include "nsISupports.idl"
+
+interface nsIDOMWindow;
+interface nsIPrintSettings;
+interface nsIWebProgressListener;
+
+%{ C++
+#include <stdio.h>
+%}
+
+[ptr] native FILE(FILE);
+
+/**
+ * The nsIDocShellFile    
+ */
+
+[scriptable, uuid(564a3276-6228-401e-9b5c-d82cb382a60f)]
+interface nsIContentViewerFile : nsISupports
+{
+  readonly attribute boolean printable;
+
+  [noscript] void print(in boolean aSilent,
+                        in FILE    aDebugFile, 
+                        in nsIPrintSettings aPrintSettings);
+};