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diff --git a/dom/workers/remoteworkers/RemoteWorkerControllerChild.h b/dom/workers/remoteworkers/RemoteWorkerControllerChild.h
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+/* -*- 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_remoteworkercontrollerchild_h__
+#define mozilla_dom_remoteworkercontrollerchild_h__
+
+#include "nsISupportsImpl.h"
+
+#include "RemoteWorkerController.h"
+#include "mozilla/RefPtr.h"
+#include "mozilla/dom/PRemoteWorkerControllerChild.h"
+
+namespace mozilla::dom {
+
+/**
+ * Parent-process main-thread proxy used by ServiceWorkerManager to control
+ * RemoteWorkerController instances on the parent-process PBackground thread.
+ */
+class RemoteWorkerControllerChild final : public PRemoteWorkerControllerChild {
+ friend class PRemoteWorkerControllerChild;
+
+ public:
+ NS_INLINE_DECL_REFCOUNTING(RemoteWorkerControllerChild, override)
+
+ explicit RemoteWorkerControllerChild(RefPtr<RemoteWorkerObserver> aObserver);
+
+ void Initialize();
+
+ void RevokeObserver(RemoteWorkerObserver* aObserver);
+
+ void MaybeSendDelete();
+
+ TimeStamp GetRemoteWorkerLaunchStart();
+ TimeStamp GetRemoteWorkerLaunchEnd();
+
+ private:
+ ~RemoteWorkerControllerChild() = default;
+
+ PFetchEventOpChild* AllocPFetchEventOpChild(
+ const ParentToParentServiceWorkerFetchEventOpArgs& aArgs);
+
+ bool DeallocPFetchEventOpChild(PFetchEventOpChild* aActor);
+
+ void ActorDestroy(ActorDestroyReason aReason) override;
+
+ mozilla::ipc::IPCResult RecvCreationFailed();
+
+ mozilla::ipc::IPCResult RecvCreationSucceeded();
+
+ mozilla::ipc::IPCResult RecvErrorReceived(const ErrorValue& aError);
+
+ mozilla::ipc::IPCResult RecvTerminated();
+
+ mozilla::ipc::IPCResult RecvSetServiceWorkerSkipWaitingFlag(
+ SetServiceWorkerSkipWaitingFlagResolver&& aResolve);
+
+ RefPtr<RemoteWorkerObserver> mObserver;
+
+ bool mIPCActive = true;
+
+ TimeStamp mRemoteWorkerLaunchStart;
+ TimeStamp mRemoteWorkerLaunchEnd;
+};
+
+} // namespace mozilla::dom
+
+#endif // mozilla_dom_remoteworkercontrollerchild_h__