diff -r 000000000000 -r 6474c204b198 caps/include/nsNullPrincipal.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/caps/include/nsNullPrincipal.h	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,59 @@
+/* -*- Mode: C++; tab-width: 2; 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/. */
+
+/**
+ * This is the principal that has no rights and can't be accessed by
+ * anything other than itself and chrome; null principals are not
+ * same-origin with anything but themselves.
+ */
+
+#ifndef nsNullPrincipal_h__
+#define nsNullPrincipal_h__
+
+#include "nsIPrincipal.h"
+#include "nsJSPrincipals.h"
+#include "nsCOMPtr.h"
+#include "nsIContentSecurityPolicy.h"
+
+class nsIURI;
+
+#define NS_NULLPRINCIPAL_CID \
+{ 0xdd156d62, 0xd26f, 0x4441, \
+ { 0x9c, 0xdb, 0xe8, 0xf0, 0x91, 0x07, 0xc2, 0x73 } }
+#define NS_NULLPRINCIPAL_CONTRACTID "@mozilla.org/nullprincipal;1"
+
+#define NS_NULLPRINCIPAL_SCHEME "moz-nullprincipal"
+
+class nsNullPrincipal : public nsJSPrincipals
+{
+public:
+  nsNullPrincipal();
+  
+  // Our refcount is managed by nsJSPrincipals.  Use this macro to avoid an
+  // extra refcount member.
+
+  // FIXME: bug 327245 -- I sorta wish there were a clean way to share the
+  // nsJSPrincipals munging code between the various principal classes without
+  // giving up the NS_DECL_NSIPRINCIPAL goodness.
+  NS_DECL_ISUPPORTS_INHERITED
+  NS_DECL_NSIPRINCIPAL
+  NS_DECL_NSISERIALIZABLE
+
+  nsresult Init();
+
+  virtual void GetScriptLocation(nsACString &aStr) MOZ_OVERRIDE;
+
+#ifdef DEBUG
+  virtual void dumpImpl() MOZ_OVERRIDE;
+#endif 
+
+ protected:
+  virtual ~nsNullPrincipal();
+
+  nsCOMPtr<nsIURI> mURI;
+  nsCOMPtr<nsIContentSecurityPolicy> mCSP;
+};
+
+#endif // nsNullPrincipal_h__