leveldb: Reuse manifest (AKA logs) during open.

content/browser/dom_storage/session_storage_database.cc

 // Copyright 2013 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/dom_storage/session_storage_database.h"
 
 #include "base/files/file_util.h"
 #include "base/logging.h"
 #include "base/metrics/histogram.h"
 #include "base/strings/string_number_conversions.h"
 #include "base/strings/stringprintf.h"
 #include "base/strings/utf_string_conversions.h"
+#include "third_party/leveldatabase/env_chromium.h"
 #include "third_party/leveldatabase/src/include/leveldb/db.h"
 #include "third_party/leveldatabase/src/include/leveldb/iterator.h"
 #include "third_party/leveldatabase/src/include/leveldb/options.h"
 #include "third_party/leveldatabase/src/include/leveldb/status.h"
 #include "third_party/leveldatabase/src/include/leveldb/write_batch.h"
 #include "url/gurl.h"
 
 
 namespace {
 
@@ skipping 351 matching lines @@
   return true;
 }
 
 leveldb::Status SessionStorageDatabase::TryToOpen(leveldb::DB** db) {
   leveldb::Options options;
   // The directory exists but a valid leveldb database might not exist inside it
   // (e.g., a subset of the needed files might be missing). Handle this
   // situation gracefully by creating the database now.
   options.max_open_files = 0;  // Use minimum.
   options.create_if_missing = true;
+  options.reuse_logs = leveldb_env::kDefaultLogReuseOptionValue;
 #if defined(OS_WIN)
   return leveldb::DB::Open(options, base::WideToUTF8(file_path_.value()), db);
 #elif defined(OS_POSIX)
   return leveldb::DB::Open(options, file_path_.value(), db);
 #endif
 }
 
 bool SessionStorageDatabase::IsOpen() const {
   return db_.get() != NULL;
 }
@@ skipping 331 matching lines @@
 std::string SessionStorageDatabase::MapKey(const std::string& map_id,
                                            const std::string& key) {
   return base::StringPrintf("map-%s-%s", map_id.c_str(), key.c_str());
 }
 
 const char* SessionStorageDatabase::NextMapIdKey() {
   return "next-map-id";
 }
 
 }  // namespace content