1 files changed, 34 insertions, 0 deletions
diff --git a/toolkit/components/sessionstore/RestoreTabContentObserver.h b/toolkit/components/sessionstore/RestoreTabContentObserver.h
new file mode 100644
index 0000000000..edab379a55
--- /dev/null
+++ b/toolkit/components/sessionstore/RestoreTabContentObserver.h
@@ -0,0 +1,34 @@
+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* 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_RestoreTabContentObserver_h
+#define mozilla_dom_RestoreTabContentObserver_h
+
+#include "mozilla/StaticPtr.h"
+#include "nsIObserver.h"
+#include "nsISupportsImpl.h"
+
+namespace mozilla {
+namespace dom {
+
+// An observer for restoring session store data at a correct time.
+class RestoreTabContentObserver final : public nsIObserver {
+ public:
+  NS_DECL_ISUPPORTS
+  NS_DECL_NSIOBSERVER
+
+  static void Initialize();
+  static void Shutdown();
+
+ private:
+  RestoreTabContentObserver() = default;
+
+  virtual ~RestoreTabContentObserver() = default;
+  static mozilla::StaticRefPtr<RestoreTabContentObserver>
+      gRestoreTabContentObserver;
+};
+}  // namespace dom
+}  // namespace mozilla
+#endif  // mozilla_dom_RestoreTabContentObserver_h