Service Worker: Use more specific errors when StartWorker fails

content/common/service_worker/service_worker_status_code.cc

Index: content/common/service_worker/service_worker_status_code.cc
diff --git a/content/common/service_worker/service_worker_status_code.cc b/content/common/service_worker/service_worker_status_code.cc
index 3f806412905dc3749a467330da55fbf07064ba4f..589cb2be65488f512f9b7a6234fa2157b42bddc5 100644
--- a/content/common/service_worker/service_worker_status_code.cc
+++ b/content/common/service_worker/service_worker_status_code.cc
@@ -41,6 +41,8 @@ const char* ServiceWorkerStatusToString(ServiceWorkerStatusCode status) {
       return "The ServiceWorker state was not valid";
     case SERVICE_WORKER_ERROR_TIMEOUT:
       return "The ServiceWorker timed out";
+    case SERVICE_WORKER_ERROR_SCRIPT_EVALUATE_FAILED:
+      return "ServiceWorker script evaluation failed";
     case SERVICE_WORKER_ERROR_MAX_VALUE:
       NOTREACHED();
   }