[Sync] Fixing easy lint violations.

components/sync/syncable/syncable_delete_journal.h

 // 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.
 
 #ifndef COMPONENTS_SYNC_SYNCABLE_SYNCABLE_DELETE_JOURNAL_H_
 #define COMPONENTS_SYNC_SYNCABLE_SYNCABLE_DELETE_JOURNAL_H_
 
 #include <stddef.h>
 
 #include <map>
+#include <memory>
 
 #include "base/gtest_prod_util.h"
 #include "base/macros.h"
 #include "base/synchronization/lock.h"
 #include "components/sync/syncable/entry_kernel.h"
 #include "components/sync/syncable/metahandle_set.h"
 
 namespace syncer {
 namespace syncable {
 
@@ skipping 87 matching lines @@
   // saved to database.
   ModelTypeSet passive_delete_journal_types_;
 
   DISALLOW_COPY_AND_ASSIGN(DeleteJournal);
 };
 
 }  // namespace syncable
 }  // namespace syncer
 
 #endif  // COMPONENTS_SYNC_SYNCABLE_SYNCABLE_DELETE_JOURNAL_H_