1 files changed, 31 insertions, 0 deletions
diff --git a/dom/performance/EventCounts.h b/dom/performance/EventCounts.h
new file mode 100644
index 0000000000..59d9c140fc
--- /dev/null
+++ b/dom/performance/EventCounts.h
@@ -0,0 +1,31 @@
+/* -*- 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_PerformanceEventCounts_h___
+#define mozilla_dom_PerformanceEventCounts_h___
+
+#include "nsCOMPtr.h"
+#include "nsWrapperCache.h"
+
+namespace mozilla::dom {
+class EventCounts final : public nsWrapperCache {
+ public:
+  NS_INLINE_DECL_CYCLE_COLLECTING_NATIVE_REFCOUNTING(EventCounts)
+  NS_DECL_CYCLE_COLLECTION_NATIVE_WRAPPERCACHE_CLASS(EventCounts)
+
+  explicit EventCounts(nsISupports* aParent);
+
+  nsISupports* GetParentObject() const { return mParent; }
+
+  JSObject* WrapObject(JSContext* aCx,
+                       JS::Handle<JSObject*> aGivenProto) override;
+
+ private:
+  ~EventCounts() = default;
+  nsCOMPtr<nsISupports> mParent;
+};
+}  // namespace mozilla::dom
+#endif