Revert of Revert "Mojoify FetchEvent of Service Worker."

content/common/service_worker/fetch_event_dispatcher.typemap

Index: content/common/service_worker/fetch_event_dispatcher.typemap
diff --git a/content/common/service_worker/fetch_event_dispatcher.typemap b/content/common/service_worker/fetch_event_dispatcher.typemap
new file mode 100644
index 0000000000000000000000000000000000000000..e4bec0cde223cec9a0af257a1a61dabf48358096
--- /dev/null
+++ b/content/common/service_worker/fetch_event_dispatcher.typemap
@@ -0,0 +1,20 @@
+# 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.
+
+mojom = "//content/common/service_worker/fetch_event_dispatcher.mojom"
+public_headers = [
+  "//content/common/service_worker/service_worker_status_code.h",
+  "//content/common/service_worker/service_worker_types.h",
+]
+sources = [
+  "//content/common/service_worker/service_worker_status_code_traits.cc",
+]
+traits_headers = [
+  "//content/common/service_worker/service_worker_messages.h",
+  "//content/common/service_worker/service_worker_status_code_traits.h",
+]
+type_mappings = [
+  "content.mojom.ServiceWorkerFetchRequest=::content::ServiceWorkerFetchRequest",
+  "blink.mojom.ServiceWorkerEventStatus=::content::ServiceWorkerStatusCode",
+]