ServiceWorker: Add UMA for storage recovery operation

content/browser/service_worker/service_worker_database.cc

Index: content/browser/service_worker/service_worker_database.cc
diff --git a/content/browser/service_worker/service_worker_database.cc b/content/browser/service_worker/service_worker_database.cc
index 2d0e2f2cc90a46d6d6ce431ffc5321f763b0076f..b04358e6cf2f4a60118f3c388cd78e9213c47e0f 100644
--- a/content/browser/service_worker/service_worker_database.cc
+++ b/content/browser/service_worker/service_worker_database.cc
@@ -969,8 +969,10 @@ ServiceWorkerDatabase::Status ServiceWorkerDatabase::DestroyDatabase() {
     }
   }
 
-  return LevelDBStatusToStatus(
-      leveldb::DestroyDB(path_.AsUTF8Unsafe(), options));
+  Status status =
+      LevelDBStatusToStatus(leveldb::DestroyDB(path_.AsUTF8Unsafe(), options));
+  ServiceWorkerMetrics::RecordDestroyDatabaseResult(status);
+  return status;
 }
 
 ServiceWorkerDatabase::Status ServiceWorkerDatabase::LazyOpen(