import FIREFOX_52_6_0esr_RELEASE from mozilla-esr52 hg repo

dom/bindings/NonRefcountedDOMObject.h

@@ -0,0 +1,37 @@
+/* -*- 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 mozilla_dom_NonRefcountedDOMObject_h__
+#define mozilla_dom_NonRefcountedDOMObject_h__
+
+#include "nsISupportsImpl.h"
+
+namespace mozilla {
+namespace dom {
+
+// Natives for DOM classes that aren't refcounted need to inherit from this
+// class.
+// If you're seeing objects of this class leak then natives for one of the DOM
+// classes inheriting from it is leaking. If the native for that class has
+// MOZ_COUNT_CTOR/DTOR in its constructor/destructor then it should show up in
+// the leak log too.
+class NonRefcountedDOMObject
+{
+protected:
+  NonRefcountedDOMObject()
+  {
+    MOZ_COUNT_CTOR(NonRefcountedDOMObject);
+  }
+  ~NonRefcountedDOMObject()
+  {
+    MOZ_COUNT_DTOR(NonRefcountedDOMObject);
+  }
+};
+
+} // namespace dom
+} // namespace mozilla
+
+#endif /* mozilla_dom_NonRefcountedDOMObject_h__ */