Mojoify FetchEvent of Service Worker.

content/common/service_worker/service_worker_status_code_traits.cc

+// 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.
+
+#include "content/common/service_worker/service_worker_status_code_traits.h"
+
+#include "base/logging.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 {
+
+// static
+blink::mojom::ServiceWorkerEventStatus EnumTraits<
+    blink::mojom::ServiceWorkerEventStatus,
+    content::ServiceWorkerStatusCode>::ToMojom(content::ServiceWorkerStatusCode
+                                                   input) {
+  switch (input) {
+    case content::SERVICE_WORKER_OK:
+      return blink::mojom::ServiceWorkerEventStatus::COMPLETED;
+    case content::SERVICE_WORKER_ERROR_EVENT_WAITUNTIL_REJECTED:
+      return blink::mojom::ServiceWorkerEventStatus::REJECTED;
+    case content::SERVICE_WORKER_ERROR_ABORT:
+      return blink::mojom::ServiceWorkerEventStatus::ABORTED;
+    default:
+      NOTREACHED() << "Unexpected ServiceWorkerStatusCode: " << input;
+      return blink::mojom::ServiceWorkerEventStatus::ABORTED;

[shimazu, 2016/09/23 08:15:03]

Do we have some rules for 'default'? 
Which pattern is preferred?
# I prefer the pattern B

= Pattern A =
func() {
  switch (...) {
    default:
      return;
  }
  // no return
}

= Pattern B =
func() {
  switch (...) {
    // no default
  }
  return;
}

[horo, 2016/09/23 09:13:35]

We need a "default" case.
The compiler checks it.

../../content/common/service_worker/service_worker_status_code_traits.cc:18:11:
error: 17 enumeration values not handled in switch:
'SERVICE_WORKER_ERROR_FAILED', 'SERVICE_WORKER_ERROR_START_WORKER_FAILED',
'SERVICE_WORKER_ERROR_PROCESS_NOT_FOUND'... [-Werror,-Wswitch]
  switch (input) {
          ^

+  }
+}
+
+// static
+bool EnumTraits<blink::mojom::ServiceWorkerEventStatus,
+                content::ServiceWorkerStatusCode>::
+    FromMojom(blink::mojom::ServiceWorkerEventStatus input,
+              content::ServiceWorkerStatusCode* out) {
+  switch (input) {
+    case blink::mojom::ServiceWorkerEventStatus::COMPLETED:
+      *out = content::SERVICE_WORKER_OK;
+      return true;
+    case blink::mojom::ServiceWorkerEventStatus::REJECTED:
+      *out = content::SERVICE_WORKER_ERROR_EVENT_WAITUNTIL_REJECTED;
+      return true;
+    case blink::mojom::ServiceWorkerEventStatus::ABORTED:
+      *out = content::SERVICE_WORKER_ERROR_ABORT;
+      return true;
+  }
+  NOTREACHED();
+  return false;
+}
+
+}  // namespace content