leveldb: Reuse manifest (AKA logs) during open.

storage/browser/fileapi/sandbox_directory_database.cc

 // Copyright (c) 2012 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 "storage/browser/fileapi/sandbox_directory_database.h"
 
 #include <math.h>
 #include <algorithm>
 #include <set>
 #include <stack>
 
 #include "base/files/file_enumerator.h"
 #include "base/files/file_util.h"
 #include "base/location.h"
 #include "base/metrics/histogram.h"
 #include "base/pickle.h"
 #include "base/strings/string_number_conversions.h"
 #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"
 
 namespace {
 
 bool PickleFromFileInfo(const storage::SandboxDirectoryDatabase::FileInfo& info,
                         Pickle* pickle) {
   DCHECK(pickle);
   std::string data_path;
   // Round off here to match the behavior of the filesystem on real files.
@@ skipping 689 matching lines @@
 bool SandboxDirectoryDatabase::Init(RecoveryOption recovery_option) {
   if (db_)
     return true;
 
   std::string path =
       FilePathToString(filesystem_data_directory_.Append(
           kDirectoryDatabaseName));
   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;
   leveldb::Status status = leveldb::DB::Open(options, path, &db);
   ReportInitStatus(status);
   if (status.ok()) {
     db_.reset(db);
     return true;
   }
   HandleError(FROM_HERE, status);
@@ skipping 191 matching lines @@
 
 void SandboxDirectoryDatabase::HandleError(
     const tracked_objects::Location& from_here,
     const leveldb::Status& status) {
   LOG(ERROR) << "SandboxDirectoryDatabase failed at: "
              << from_here.ToString() << " with error: " << status.ToString();
   db_.reset();
 }
 
 }  // namespace storage