service worker: Avoid starting up for activation during shutdown

content/browser/service_worker/service_worker_metrics.cc

Index: content/browser/service_worker/service_worker_metrics.cc
diff --git a/content/browser/service_worker/service_worker_metrics.cc b/content/browser/service_worker/service_worker_metrics.cc
index a481b8bf03589ba0fdd19e209b76e7c869d1b9fe..3b324ee2d93335e8e88c24359d6077aaba31e48b 100644
--- a/content/browser/service_worker/service_worker_metrics.cc
+++ b/content/browser/service_worker/service_worker_metrics.cc
@@ -306,6 +306,18 @@ void ServiceWorkerMetrics::RecordActivateEventStatus(
                             SERVICE_WORKER_ERROR_MAX_VALUE);
 }
 
+void ServiceWorkerMetrics::RecordActivateEventStatusWithShutdownStatus(
+    ServiceWorkerStatusCode status,
+    bool is_shutdown) {
+  if (is_shutdown) {
+    UMA_HISTOGRAM_ENUMERATION("ServiceWorker.ActivateEventStatus_InShutdown",
+                              status, SERVICE_WORKER_ERROR_MAX_VALUE);
+  } else {
+    UMA_HISTOGRAM_ENUMERATION("ServiceWorker.ActivateEventStatus_NotInShutdown",
+                              status, SERVICE_WORKER_ERROR_MAX_VALUE);
+  }
+}
+
 void ServiceWorkerMetrics::RecordInstallEventStatus(
     ServiceWorkerStatusCode status) {
   UMA_HISTOGRAM_ENUMERATION("ServiceWorker.InstallEventStatus", status,