Have a central operation status code for ServiceWorker

content/common/service_worker/service_worker_status_code.cc

+// Copyright 2014 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.h"
+
+#include "base/logging.h"
+
+namespace content {
+
+const char* ServiceWorkerStatusToString(ServiceWorkerStatusCode status) {
+  switch (status) {
+    case SERVICE_WORKER_OK:
+      return "Operation has succeeded";
+    case SERVICE_WORKER_ERROR_FAILED:
+      return "Operation has failed (unknown reason)";
+    case SERVICE_WORKER_ERROR_ABORT:
+      return "Operation has been aborted";
+    case SERVICE_WORKER_ERROR_PROCESS_NOT_FOUND:
+      return "Could not find a renderer process to run a service worker";
+    case SERVICE_WORKER_ERROR_START_WORKER_FAILED:
+      return "ServiceWorker cannot be started";
+    case SERVICE_WORKER_ERROR_INSTALL_WORKER_FAILED:
+      return "ServiceWorker failed to install";
+    case SERVICE_WORKER_ERROR_ACTIVATE_WORKER_FAILED:
+      return "ServiceWorker failed to activate";
+  }
+  NOTREACHED();
+  return "";
+}
+
+}  // namespace content