leveldb: Reuse manifest (AKA logs) during open.

content/browser/service_worker/service_worker_database.cc

 // Copyright 2014 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/service_worker/service_worker_database.h"
 
 #include "base/files/file_util.h"
 #include "base/location.h"
 #include "base/logging.h"
 #include "base/metrics/histogram.h"
 #include "base/stl_util.h"
 #include "base/strings/string_number_conversions.h"
 #include "base/strings/string_split.h"
 #include "base/strings/string_util.h"
 #include "base/strings/stringprintf.h"
 #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"
 #include "third_party/leveldatabase/src/include/leveldb/write_batch.h"
 
 // LevelDB database schema
 // =======================
 //
 // NOTE
 // - int64 value is serialized as a string by base::Int64ToString().
@@ skipping 961 matching lines @@
     // Avoid opening a database if it does not exist at the |path_|.
     if (use_in_memory_db ||
         !base::PathExists(path_) ||
         base::IsDirectoryEmpty(path_)) {
       return STATUS_ERROR_NOT_FOUND;
     }
   }
 
   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();
   }
 
   leveldb::DB* db = NULL;
   Status status = LevelDBStatusToStatus(
       leveldb::DB::Open(options, path_.AsUTF8Unsafe(), &db));
   HandleOpenResult(FROM_HERE, status);
   if (status != STATUS_OK) {
@@ skipping 433 matching lines @@
 
 void ServiceWorkerDatabase::HandleWriteResult(
     const tracked_objects::Location& from_here,
     Status status) {
   if (status != STATUS_OK)
     Disable(from_here, status);
   ServiceWorkerMetrics::CountWriteDatabaseResult(status);
 }
 
 }  // namespace content