diff -r 000000000000 -r 6474c204b198 xpcom/glue/nsCycleCollectionNoteRootCallback.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/xpcom/glue/nsCycleCollectionNoteRootCallback.h	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,29 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=8 sts=2 et sw=2 tw=80: */
+/* 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 nsCycleCollectionNoteRootCallback_h__
+#define nsCycleCollectionNoteRootCallback_h__
+
+class nsCycleCollectionParticipant;
+class nsISupports;
+
+class nsCycleCollectionNoteRootCallback
+{
+public:
+  NS_IMETHOD_(void) NoteXPCOMRoot(nsISupports *root) = 0;
+  NS_IMETHOD_(void) NoteJSRoot(void *root) = 0;
+  NS_IMETHOD_(void) NoteNativeRoot(void *root, nsCycleCollectionParticipant *participant) = 0;
+
+  NS_IMETHOD_(void) NoteWeakMapping(void *map, void *key, void *kdelegate, void *val) = 0;
+
+  bool WantAllTraces() const { return mWantAllTraces; }
+protected:
+  nsCycleCollectionNoteRootCallback() : mWantAllTraces(false) {}
+
+  bool mWantAllTraces;
+};
+
+#endif // nsCycleCollectionNoteRootCallback_h__