Convert utility process extension Unpacker IPC to mojo

extensions/common/manifest_location_struct_traits.h

Index: extensions/common/manifest_location_struct_traits.h
diff --git a/extensions/common/manifest_location_struct_traits.h b/extensions/common/manifest_location_struct_traits.h
new file mode 100644
index 0000000000000000000000000000000000000000..495af668c280b0fd3959a252e03ff6f608435e9a
--- /dev/null
+++ b/extensions/common/manifest_location_struct_traits.h
@@ -0,0 +1,25 @@
+// Copyright 2017 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef EXTENSIONS_COMMON_MANIFEST_LOCATION_STRUCT_TRAITS_H
+#define EXTENSIONS_COMMON_MANIFEST_LOCATION_STRUCT_TRAITS_H
+
+#include "extensions/common/manifest.h"
+#include "extensions/common/manifest_location.mojom-shared.h"
+
+namespace mojo {
+
+template <>
+struct EnumTraits<::extensions::mojom::ManifestLocation,
+                  ::extensions::Manifest::Location> {
+  static ::extensions::mojom::ManifestLocation ToMojom(
+      ::extensions::Manifest::Location input);
+
+  static bool FromMojom(::extensions::mojom::ManifestLocation input,
+                        ::extensions::Manifest::Location* output);
+};
+
+}  // namespace mojo
+
+#endif  // EXTENSIONS_COMMON_MANIFEST_LOCATION_STRUCT_TRAITS_H