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diff --git a/dom/base/ParentProcessMessageManager.h b/dom/base/ParentProcessMessageManager.h
new file mode 100644
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+++ b/dom/base/ParentProcessMessageManager.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_ParentProcessMessageManager_h
+#define mozilla_dom_ParentProcessMessageManager_h
+
+#include "mozilla/dom/MessageBroadcaster.h"
+
+namespace mozilla {
+namespace dom {
+
+/**
+ * Implementation for the WebIDL ParentProcessMessageManager interface.
+ * ParentProcessMessageManager is used in a parent process to communicate with
+ * all the child processes.
+ */
+class ParentProcessMessageManager final : public MessageBroadcaster {
+ public:
+  ParentProcessMessageManager();
+
+  virtual JSObject* WrapObject(JSContext* aCx,
+                               JS::Handle<JSObject*> aGivenProto) override;
+
+  // ProcessScriptLoader
+  void LoadProcessScript(const nsAString& aUrl, bool aAllowDelayedLoad,
+                         mozilla::ErrorResult& aError) {
+    LoadScript(aUrl, aAllowDelayedLoad, false, aError);
+  }
+  void RemoveDelayedProcessScript(const nsAString& aURL) {
+    RemoveDelayedScript(aURL);
+  }
+  void GetDelayedProcessScripts(JSContext* aCx,
+                                nsTArray<nsTArray<JS::Value>>& aScripts,
+                                mozilla::ErrorResult& aError) {
+    GetDelayedScripts(aCx, aScripts, aError);
+  }
+
+  // GlobalProcessScriptLoader
+  using nsFrameMessageManager::GetInitialProcessData;
+
+ private:
+  virtual ~ParentProcessMessageManager();
+};
+
+}  // namespace dom
+}  // namespace mozilla
+
+#endif  // mozilla_dom_ParentProcessMessageManager_h