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

components/sync/engine/attachments/on_disk_attachment_store.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/sync/engine/attachments/on_disk_attachment_store.h"
 
 #include <stdint.h>
 
 #include <utility>
 
@@ skipping 347 matching lines @@
   base::FilePath leveldb_path = path.Append(kLeveldbDirectory);
 
   leveldb::DB* db_raw;
   std::unique_ptr<leveldb::DB> db;
   leveldb::Options options;
   options.create_if_missing = true;
   options.reuse_logs = leveldb_env::kDefaultLogReuseOptionValue;
   // TODO(pavely): crbug/424287 Consider adding info_log, block_cache and
   // filter_policy to options.
   leveldb::Status status =
-      leveldb::DB::Open(options, leveldb_path.AsUTF8Unsafe(), &db_raw);
+      leveldb_env::DBRegistry::Open(options, leveldb_path.AsUTF8Unsafe(), &db_raw);
   if (!status.ok()) {
     DVLOG(1) << "DB::Open failed: status=" << status.ToString()
              << ", path=" << path.AsUTF8Unsafe();
     return AttachmentStore::UNSPECIFIED_ERROR;
   }
 
   db.reset(db_raw);
 
   attachment_store_pb::StoreMetadata metadata;
   status = ReadStoreMetadata(db.get(), &metadata);
@@ skipping 152 matching lines @@
   return key;
 }
 
 AttachmentMetadata OnDiskAttachmentStore::MakeAttachmentMetadata(
     const AttachmentId& attachment_id,
     const attachment_store_pb::RecordMetadata& record_metadata) {
   return AttachmentMetadata(attachment_id, record_metadata.attachment_size());
 }
 
 }  // namespace syncer