leveldb: Add DBTracker for exposing databases to Chrome's memory-infra.

storage/browser/fileapi/sandbox_origin_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_origin_database.h"
 
 #include <stdint.h>
 
 #include <memory>
 #include <set>
@@ skipping 70 matching lines @@
     return false;
 
   std::string path = FilePathToString(db_path);
   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);
+  leveldb::Status status = leveldb_env::DBRegistry::Open(options, path, &db);
   ReportInitStatus(status);
   if (status.ok()) {
     db_.reset(db);
     return true;
   }
   HandleError(FROM_HERE, status);
 
   // Corruption due to missing necessary MANIFEST-* file causes IOError instead
   // of Corruption error.
   // Try to repair database even when IOError case.
@@ skipping 246 matching lines @@
   status = db_->Put(leveldb::WriteOptions(), LastPathKey(), std::string("-1"));
   if (!status.ok()) {
     HandleError(FROM_HERE, status);
     return false;
   }
   *number = -1;
   return true;
 }
 
 }  // namespace storage