leveldb: Reuse manifest (AKA logs) during open.

chrome/browser/prefs/leveldb_pref_store.cc

Index: chrome/browser/prefs/leveldb_pref_store.cc
diff --git a/chrome/browser/prefs/leveldb_pref_store.cc b/chrome/browser/prefs/leveldb_pref_store.cc
index f397b08b5ed1b5065a51aaf640d8338fd0452198..c0af10387a288728e38ceba80f8299e40c67c8bb 100644
--- a/chrome/browser/prefs/leveldb_pref_store.cc
+++ b/chrome/browser/prefs/leveldb_pref_store.cc
@@ -15,6 +15,7 @@
 #include "base/threading/thread_restrictions.h"
 #include "base/time/time.h"
 #include "base/values.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"
 
@@ -106,6 +107,7 @@ void LevelDBPrefStore::OpenDB(const base::FilePath& path,
   DCHECK_EQ(0, reading_results->error);
   leveldb::Options options;
   options.create_if_missing = true;
+  options.reuse_logs = leveldb_env::kDefaultLogReuseOptionValue;
   leveldb::DB* db;
   while (1) {
     leveldb::Status status =