1 files changed, 48 insertions, 0 deletions
diff --git a/dom/streams/CountQueuingStrategy.h b/dom/streams/CountQueuingStrategy.h
new file mode 100644
index 0000000000..bbf109efbc
--- /dev/null
+++ b/dom/streams/CountQueuingStrategy.h
@@ -0,0 +1,48 @@
+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim:set ts=2 sw=2 sts=2 et cindent: */
+/* 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_CountQueuingStrategy_h
+#define mozilla_dom_CountQueuingStrategy_h
+
+#include "js/TypeDecls.h"
+#include "mozilla/Attributes.h"
+#include "mozilla/ErrorResult.h"
+#include "mozilla/dom/BaseQueuingStrategy.h"
+#include "mozilla/dom/BindingDeclarations.h"
+#include "mozilla/dom/QueuingStrategyBinding.h"
+#include "nsCycleCollectionParticipant.h"
+#include "nsWrapperCache.h"
+#include "nsIGlobalObject.h"
+
+namespace mozilla::dom {
+
+class CountQueuingStrategy final : public BaseQueuingStrategy,
+                                   public nsWrapperCache {
+ public:
+  NS_DECL_ISUPPORTS_INHERITED
+  NS_DECL_CYCLE_COLLECTION_WRAPPERCACHE_CLASS_INHERITED(CountQueuingStrategy,
+                                                        BaseQueuingStrategy)
+
+ public:
+  explicit CountQueuingStrategy(nsISupports* aGlobal, double aHighWaterMark)
+      : BaseQueuingStrategy(aGlobal, aHighWaterMark) {}
+
+ protected:
+  ~CountQueuingStrategy() override = default;
+
+ public:
+  JSObject* WrapObject(JSContext* aCx,
+                       JS::Handle<JSObject*> aGivenProto) override;
+
+  static already_AddRefed<CountQueuingStrategy> Constructor(
+      const GlobalObject& aGlobal, const QueuingStrategyInit& aInit);
+
+  already_AddRefed<Function> GetSize(ErrorResult& aRv);
+};
+
+}  // namespace mozilla::dom
+
+#endif  // mozilla_dom_CountQueuingStrategy_h