Revert of Revert "Mojoify FetchEvent of Service Worker."

content/common/service_worker/service_worker_status_code_traits.h

Index: content/common/service_worker/service_worker_status_code_traits.h
diff --git a/content/common/service_worker/service_worker_status_code_traits.h b/content/common/service_worker/service_worker_status_code_traits.h
new file mode 100644
index 0000000000000000000000000000000000000000..98139c1becd5a0303f8ea40bdc438edcdc4e4661
--- /dev/null
+++ b/content/common/service_worker/service_worker_status_code_traits.h
@@ -0,0 +1,25 @@
+// Copyright 2016 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 CONTENT_COMMON_SERVICE_WORKER_SERVICE_WORKER_STATUS_CODE_TRAITS_H_
+#define CONTENT_COMMON_SERVICE_WORKER_SERVICE_WORKER_STATUS_CODE_TRAITS_H_
+
+#include "content/common/service_worker/service_worker_status_code.h"
+#include "third_party/WebKit/public/platform/modules/serviceworker/service_worker_event_status.mojom.h"
+
+namespace mojo {
+
+template <>
+struct EnumTraits<blink::mojom::ServiceWorkerEventStatus,
+                  content::ServiceWorkerStatusCode> {
+  static blink::mojom::ServiceWorkerEventStatus ToMojom(
+      content::ServiceWorkerStatusCode input);
+
+  static bool FromMojom(blink::mojom::ServiceWorkerEventStatus input,
+                        content::ServiceWorkerStatusCode* out);
+};
+
+}  // namespace mojo
+
+#endif  // CONTENT_COMMON_SERVICE_WORKER_SERVICE_WORKER_STATUS_CODE_TRAITS_H_