Convert //chrome/browser/sync_file_system from scoped_ptr to std::unique_ptr

chrome/browser/sync_file_system/drive_backend/metadata_db_migration_util.cc

 // Copyright 2013 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 "chrome/browser/sync_file_system/drive_backend/metadata_db_migration_util.h"
 
+#include <memory>
+
 #include "base/files/file_path.h"
-#include "base/memory/scoped_ptr.h"
 #include "base/strings/string_util.h"
 #include "chrome/browser/sync_file_system/drive_backend/drive_backend_util.h"
 #include "storage/common/fileapi/file_system_types.h"
 #include "storage/common/fileapi/file_system_util.h"
 #include "third_party/leveldatabase/src/include/leveldb/db.h"
 #include "third_party/leveldatabase/src/include/leveldb/write_batch.h"
 #include "url/gurl.h"
 
 namespace sync_file_system {
 namespace drive_backend {
@@ skipping 15 matching lines @@
   const char kMultiTrackerByFileIDKeyPrefix[] = "MULTI_FILE: ";
   const char kActiveTrackerIDByParentAndTitleKeyPrefix[] = "ACTIVE_PATH: ";
   const char kTrackerIDByParentAndTitleKeyPrefix[] = "TRACKER_PATH: ";
   const char kMultiBackingParentAndTitleKeyPrefix[] = "MULTI_PATH: ";
   const char kDirtyIDKeyPrefix[] = "DIRTY: ";
   const char kDemotedDirtyIDKeyPrefix[] = "DEMOTED_DIRTY: ";
 
   leveldb::WriteBatch write_batch;
   write_batch.Put(kDatabaseVersionKey, "3");
 
-  scoped_ptr<leveldb::Iterator> itr(db->NewIterator(leveldb::ReadOptions()));
+  std::unique_ptr<leveldb::Iterator> itr(
+      db->NewIterator(leveldb::ReadOptions()));
   for (itr->SeekToFirst(); itr->Valid(); itr->Next()) {
     std::string key = itr->key().ToString();
 
     // Do nothing for valid entries in both versions.
     if (base::StartsWith(key, kServiceMetadataKey,
                          base::CompareCase::SENSITIVE) ||
         base::StartsWith(key, kFileMetadataKeyPrefix,
                          base::CompareCase::SENSITIVE) ||
         base::StartsWith(key, kFileTrackerKeyPrefix,
                          base::CompareCase::SENSITIVE)) {
@@ skipping 25 matching lines @@
 
     DVLOG(3) << "Unknown key: " << key << " was found.";
   }
 
   return LevelDBStatusToSyncStatusCode(
       db->Write(leveldb::WriteOptions(), &write_batch));
 }
 
 }  // namespace drive_backend
 }  // namespace sync_file_system