diff -r 000000000000 -r 6474c204b198 js/xpconnect/public/nsAXPCNativeCallContext.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/js/xpconnect/public/nsAXPCNativeCallContext.h	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,41 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/* vim: set ts=8 sts=4 et sw=4 tw=99: */
+/* 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 nsAXPCNativeCallContext_h__
+#define nsAXPCNativeCallContext_h__
+
+class nsIXPConnectWrappedNative;
+
+/**
+* A native call context is allocated on the stack when XPConnect calls a
+* native method. Holding a pointer to this object beyond the currently
+* executing stack frame is not permitted.
+*/
+class nsAXPCNativeCallContext
+{
+public:
+    NS_IMETHOD GetCallee(nsISupports **aResult) = 0;
+    NS_IMETHOD GetCalleeMethodIndex(uint16_t *aResult) = 0;
+    NS_IMETHOD GetCalleeWrapper(nsIXPConnectWrappedNative **aResult) = 0;
+    NS_IMETHOD GetJSContext(JSContext **aResult) = 0;
+    NS_IMETHOD GetArgc(uint32_t *aResult) = 0;
+    NS_IMETHOD GetArgvPtr(JS::Value **aResult) = 0;
+
+    // Methods added since mozilla 0.6....
+
+    NS_IMETHOD GetCalleeInterface(nsIInterfaceInfo **aResult) = 0;
+    NS_IMETHOD GetCalleeClassInfo(nsIClassInfo **aResult) = 0;
+
+    NS_IMETHOD GetPreviousCallContext(nsAXPCNativeCallContext **aResult) = 0;
+
+    enum { LANG_UNKNOWN = 0,
+           LANG_JS      = 1,
+           LANG_NATIVE  = 2 };
+
+    NS_IMETHOD GetLanguage(uint16_t *aResult) = 0;
+};
+
+#endif