leveldb: Reuse manifest (AKA logs) during open.

content/browser/notifications/notification_database.cc

 // Copyright 2015 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/notifications/notification_database.h"
 
 #include <string>
 
 #include "base/files/file_util.h"
 #include "base/strings/string_number_conversions.h"
 #include "base/strings/stringprintf.h"
 #include "content/browser/notifications/notification_database_data_conversions.h"
 #include "content/common/service_worker/service_worker_types.h"
 #include "content/public/browser/browser_thread.h"
 #include "content/public/browser/notification_database_data.h"
 #include "storage/common/database/database_identifier.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"
 #include "third_party/leveldatabase/src/include/leveldb/write_batch.h"
 #include "url/gurl.h"
 
 // Notification LevelDB database schema (in alphabetized order)
 // =======================
 //
 // key: "DATA:" <origin identifier> '\x00' <notification_id>
@@ skipping 80 matching lines @@
     if (IsInMemoryDatabase() ||
         !base::PathExists(path_) ||
         base::IsDirectoryEmpty(path_)) {
       return NotificationDatabase::STATUS_ERROR_NOT_FOUND;
     }
   }
 
   leveldb::Options options;
   options.create_if_missing = create_if_missing;
   options.paranoid_checks = true;
+  options.reuse_logs = leveldb_env::kDefaultLogReuseOptionValue;
   if (IsInMemoryDatabase()) {
     env_.reset(leveldb::NewMemEnv(leveldb::Env::Default()));
     options.env = env_.get();
   }
 
   leveldb::DB* db = nullptr;
   Status status = LevelDBStatusToStatus(
       leveldb::DB::Open(options, path_.AsUTF8Unsafe(), &db));
   if (status != STATUS_OK)
     return status;
@@ skipping 236 matching lines @@
     batch.Delete(iter->key());
   }
 
   if (deleted_notification_set->empty())
     return STATUS_OK;
 
   return LevelDBStatusToStatus(db_->Write(leveldb::WriteOptions(), &batch));
 }
 
 }  // namespace content