diff -r 000000000000 -r 6474c204b198 toolkit/devtools/server/nsJSInspector.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/toolkit/devtools/server/nsJSInspector.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 COMPONENTS_JSINSPECTOR_H
+#define COMPONENTS_JSINSPECTOR_H
+
+#include "nsIJSInspector.h"
+#include "mozilla/Attributes.h"
+#include "nsCycleCollectionParticipant.h"
+#include "nsTArray.h"
+#include "js/Value.h"
+#include "js/RootingAPI.h"
+
+namespace mozilla {
+namespace jsinspector {
+
+class nsJSInspector MOZ_FINAL : public nsIJSInspector
+{
+public:
+  NS_DECL_CYCLE_COLLECTING_ISUPPORTS
+  NS_DECL_CYCLE_COLLECTION_SCRIPT_HOLDER_CLASS(nsJSInspector)
+  NS_DECL_NSIJSINSPECTOR
+
+  nsJSInspector();
+
+private:
+  ~nsJSInspector();
+
+  uint32_t mNestedLoopLevel;
+  nsTArray<JS::Heap<JS::Value> > mRequestors;
+  JS::Heap<JS::Value> mLastRequestor;
+};
+
+}
+}
+
+#endif