service worker: Avoid starting up for activation during shutdown

content/browser/service_worker/service_worker_metrics.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/browser/service_worker/service_worker_metrics.h"
 
 #include <limits>
 #include <string>
 
 #include "base/metrics/histogram_macros.h"
@@ skipping 294 matching lines @@
   UMA_HISTOGRAM_ENUMERATION("ServiceWorker.WorkerStopped",
                             static_cast<int>(status),
                             static_cast<int>(StopStatus::NUM_TYPES));
 }
 
 void ServiceWorkerMetrics::RecordStopWorkerTime(base::TimeDelta time) {
   UMA_HISTOGRAM_MEDIUM_TIMES("ServiceWorker.StopWorker.Time", time);
 }
 
 void ServiceWorkerMetrics::RecordActivateEventStatus(
-    ServiceWorkerStatusCode status) {
+    ServiceWorkerStatusCode status,
+    bool is_shutdown) {
   UMA_HISTOGRAM_ENUMERATION("ServiceWorker.ActivateEventStatus", status,
                             SERVICE_WORKER_ERROR_MAX_VALUE);
+  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,
                             SERVICE_WORKER_ERROR_MAX_VALUE);
 }
 
 void ServiceWorkerMetrics::RecordEventHandledRatio(EventType event,
                                                    size_t handled_events,
@@ skipping 246 matching lines @@
   } else if (failure_count == 2) {
     UMA_HISTOGRAM_ENUMERATION("ServiceWorker.StartWorker.AfterFailureStreak_2",
                               status, SERVICE_WORKER_ERROR_MAX_VALUE);
   } else if (failure_count == 3) {
     UMA_HISTOGRAM_ENUMERATION("ServiceWorker.StartWorker.AfterFailureStreak_3",
                               status, SERVICE_WORKER_ERROR_MAX_VALUE);
   }
 }
 
 }  // namespace content