ServiceWorker: Add UMA for Activate and Install event results.

content/browser/service_worker/service_worker_register_job.cc

Index: content/browser/service_worker/service_worker_register_job.cc
diff --git a/content/browser/service_worker/service_worker_register_job.cc b/content/browser/service_worker/service_worker_register_job.cc
index 3435177898635c109f587822a8d9d34bcd910953..6b55012093fed784edadc256099567307f1d51e8 100644
--- a/content/browser/service_worker/service_worker_register_job.cc
+++ b/content/browser/service_worker/service_worker_register_job.cc
@@ -9,6 +9,7 @@
 #include "base/message_loop/message_loop.h"
 #include "content/browser/service_worker/service_worker_context_core.h"
 #include "content/browser/service_worker/service_worker_job_coordinator.h"
+#include "content/browser/service_worker/service_worker_metrics.h"
 #include "content/browser/service_worker/service_worker_registration.h"
 #include "content/browser/service_worker/service_worker_storage.h"
 #include "content/browser/service_worker/service_worker_utils.h"
@@ -385,6 +386,8 @@ void ServiceWorkerRegisterJob::InstallAndContinue() {
 
 void ServiceWorkerRegisterJob::OnInstallFinished(
     ServiceWorkerStatusCode status) {
+  ServiceWorkerMetrics::RecordInstallEventStatus(status);
+
   if (status != SERVICE_WORKER_OK) {
     // "8. If installFailed is true, then:..."
     Complete(status);