Change mojo enums to be scoped enums in the generated C++ bindings.

content/renderer/service_worker/service_worker_context_client.cc

Index: content/renderer/service_worker/service_worker_context_client.cc
diff --git a/content/renderer/service_worker/service_worker_context_client.cc b/content/renderer/service_worker/service_worker_context_client.cc
index 7b0bd8964d5991fba14fa62fb519de9e7a3afbaf..67c28954ffa6ade915820c5e7cfd0ccb91e070f8 100644
--- a/content/renderer/service_worker/service_worker_context_client.cc
+++ b/content/renderer/service_worker/service_worker_context_client.cc
@@ -539,9 +539,9 @@ void ServiceWorkerContextClient::didHandleSyncEvent(
   if (!callback)
     return;
   if (result == blink::WebServiceWorkerEventResultCompleted) {
-    callback->Run(SERVICE_WORKER_EVENT_STATUS_COMPLETED);
+    callback->Run(ServiceWorkerEventStatus::COMPLETED);
   } else {
-    callback->Run(SERVICE_WORKER_EVENT_STATUS_REJECTED);
+    callback->Run(ServiceWorkerEventStatus::REJECTED);
   }
   context_->sync_event_callbacks.Remove(request_id);
 }