leveldb: Reuse manifest (AKA logs) during open.

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..b031f82ab8e1ecf91c4677d8c4c41810c44f4f4e 100644
--- a/content/browser/service_worker/service_worker_database.cc
+++ b/content/browser/service_worker/service_worker_database.cc
@@ -16,6 +16,7 @@
 #include "content/browser/service_worker/service_worker_database.pb.h"
 #include "content/browser/service_worker/service_worker_metrics.h"
 #include "content/common/service_worker/service_worker_types.h"
+#include "third_party/leveldatabase/env_chromium.h"
 #include "third_party/leveldatabase/src/helpers/memenv/memenv.h"
 #include "third_party/leveldatabase/src/include/leveldb/db.h"
 #include "third_party/leveldatabase/src/include/leveldb/env.h"
@@ -997,6 +998,7 @@ ServiceWorkerDatabase::Status ServiceWorkerDatabase::LazyOpen(
 
   leveldb::Options options;
   options.create_if_missing = create_if_missing;
+  options.reuse_logs = leveldb_env::kDefaultLogReuseOptionValue;
   if (use_in_memory_db) {
     env_.reset(leveldb::NewMemEnv(leveldb::Env::Default()));
     options.env = env_.get();