leveldb: Reuse manifest (AKA logs) during open.

storage/browser/fileapi/sandbox_directory_database.cc

Index: storage/browser/fileapi/sandbox_directory_database.cc
diff --git a/storage/browser/fileapi/sandbox_directory_database.cc b/storage/browser/fileapi/sandbox_directory_database.cc
index 8343fea823937d9845b91b70be7cfdd3e99d4d29..976a3fa288be546a21203e0f1cfad997704d636e 100644
--- a/storage/browser/fileapi/sandbox_directory_database.cc
+++ b/storage/browser/fileapi/sandbox_directory_database.cc
@@ -18,6 +18,7 @@
 #include "base/strings/string_util.h"
 #include "storage/browser/fileapi/file_system_usage_cache.h"
 #include "storage/common/fileapi/file_system_util.h"
+#include "third_party/leveldatabase/env_chromium.h"
 #include "third_party/leveldatabase/src/include/leveldb/db.h"
 #include "third_party/leveldatabase/src/include/leveldb/write_batch.h"
 
@@ -727,6 +728,7 @@ bool SandboxDirectoryDatabase::Init(RecoveryOption recovery_option) {
   leveldb::Options options;
   options.max_open_files = 0;  // Use minimum.
   options.create_if_missing = true;
+  options.reuse_logs = leveldb_env::kDefaultLogReuseOptionValue;
   if (env_override_)
     options.env = env_override_;
   leveldb::DB* db;