diff -r 000000000000 -r 6474c204b198 dom/base/nsIScriptExternalNameSet.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/dom/base/nsIScriptExternalNameSet.h	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,39 @@
+/* -*- 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/. */
+
+#ifndef nsIScriptExternalNameSet_h__
+#define nsIScriptExternalNameSet_h__
+
+#include "nsISupports.h"
+
+#define NS_ISCRIPTEXTERNALNAMESET_IID \
+  {0xa6cf90da, 0x15b3, 0x11d2,        \
+  {0x93, 0x2e, 0x00, 0x80, 0x5f, 0x8a, 0xdd, 0x32}}
+
+class nsIScriptContext;
+
+/**
+ * This interface represents a set of names or symbols that should be
+ * added to the "global" namespace of a script context. A name set is
+ * registered with the name set registry (see
+ * <code>nsIScriptNameSetRegistry</code>) at component registration
+ * time using the category manager.
+ */
+
+class nsIScriptExternalNameSet : public nsISupports
+{
+public:
+  NS_DECLARE_STATIC_IID_ACCESSOR(NS_ISCRIPTEXTERNALNAMESET_IID)
+
+  /**
+   * Called to tell the name set to do any initialization it needs to
+   */
+  NS_IMETHOD InitializeNameSet(nsIScriptContext* aScriptContext) = 0;
+};
+
+NS_DEFINE_STATIC_IID_ACCESSOR(nsIScriptExternalNameSet,
+                              NS_ISCRIPTEXTERNALNAMESET_IID)
+
+#endif /* nsIScriptExternalNameSet_h__ */