leveldb: Reuse manifest (AKA logs) during open.

components/leveldb_proto/leveldb_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 "components/leveldb_proto/leveldb_database.h"
 
 #include <string>
 #include <vector>
 
 #include "base/files/file_path.h"
 #include "base/files/file_util.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/strings/string_split.h"
 #include "base/threading/thread_checker.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/slice.h"
 #include "third_party/leveldatabase/src/include/leveldb/status.h"
 #include "third_party/leveldatabase/src/include/leveldb/write_batch.h"
 
 namespace leveldb_proto {
 
 LevelDB::LevelDB() {}
@@ skipping 23 matching lines @@
 
   LOG(WARNING) << "Unable to open " << database_dir.value() << ": "
                << status.ToString();
   return false;
 }
 
 bool LevelDB::Init(const base::FilePath& database_dir) {
   leveldb::Options options;
   options.create_if_missing = true;
   options.max_open_files = 0;  // Use minimum.
+  options.reuse_logs = leveldb_env::kDefaultLogReuseOptionValue;
   return InitWithOptions(database_dir, options);
 }
 
 bool LevelDB::Save(const base::StringPairs& entries_to_save,
                    const std::vector<std::string>& keys_to_remove) {
   DFAKE_SCOPED_LOCK(thread_checker_);
   if (!db_) {
     return false;
   }
 
@@ skipping 28 matching lines @@
   scoped_ptr<leveldb::Iterator> db_iterator(db_->NewIterator(options));
   for (db_iterator->SeekToFirst(); db_iterator->Valid(); db_iterator->Next()) {
     leveldb::Slice value_slice = db_iterator->value();
     std::string entry(value_slice.data(), value_slice.size());
     entries->push_back(entry);
   }
   return true;
 }
 
 }  // namespace leveldb_proto