1 files changed, 38 insertions, 0 deletions
diff --git a/dom/ipc/PropertyBagUtils.h b/dom/ipc/PropertyBagUtils.h
new file mode 100644
index 0000000000..7eb94b46a7
--- /dev/null
+++ b/dom/ipc/PropertyBagUtils.h
@@ -0,0 +1,38 @@
+/* -*- 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 IPC_PropertyBagUtils_h
+#define IPC_PropertyBagUtils_h
+
+#include "mozilla/ipc/IPDLParamTraits.h"
+#include "nsIPropertyBag2.h"
+#include "nsIVariant.h"
+
+namespace mozilla::ipc {
+
+/**
+ * Limited nsIVariant support. Not all types are implemented and only
+ * nsIURI is implemented with nsIVariant::GetAsInterface.
+ */
+template <>
+struct IPDLParamTraits<nsIVariant*> {
+  static void Write(IPC::MessageWriter* aWriter, IProtocol* aActor,
+                    nsIVariant* aParam);
+  static bool Read(IPC::MessageReader* aReader, IProtocol* aActor,
+                   RefPtr<nsIVariant>* aResult);
+};
+
+template <>
+struct IPDLParamTraits<nsIPropertyBag2*> {
+  static void Write(IPC::MessageWriter* aWriter, IProtocol* aActor,
+                    nsIPropertyBag2* aParam);
+  static bool Read(IPC::MessageReader* aReader, IProtocol* aActor,
+                   RefPtr<nsIPropertyBag2>* aResult);
+};
+
+}  // namespace mozilla::ipc
+
+#endif  // mozilla_ipc_URIUtils_h