1 files changed, 37 insertions, 0 deletions
diff --git a/dom/html/PlayPromise.h b/dom/html/PlayPromise.h
new file mode 100644
index 0000000000..9684f926df
--- /dev/null
+++ b/dom/html/PlayPromise.h
@@ -0,0 +1,37 @@
+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=2 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 __PlayPromise_h__
+#define __PlayPromise_h__
+
+#include "mozilla/dom/Promise.h"
+#include "mozilla/Telemetry.h"
+
+namespace mozilla::dom {
+
+// Decorates a DOM Promise to report telemetry as to whether it was resolved
+// or rejected and why.
+class PlayPromise : public Promise {
+ public:
+  static already_AddRefed<PlayPromise> Create(nsIGlobalObject* aGlobal,
+                                              ErrorResult& aRv);
+
+  using PlayPromiseArr = nsTArray<RefPtr<PlayPromise>>;
+  static void ResolvePromisesWithUndefined(const PlayPromiseArr& aPromises);
+  static void RejectPromises(const PlayPromiseArr& aPromises, nsresult aError);
+
+  ~PlayPromise();
+  void MaybeResolveWithUndefined();
+  void MaybeReject(nsresult aReason);
+
+ private:
+  explicit PlayPromise(nsIGlobalObject* aGlobal);
+  bool mFulfilled = false;
+};
+
+}  // namespace mozilla::dom
+
+#endif  // __PlayPromise_h__