Switch to standard integer types in sync/.

sync/engine/process_updates_util.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 SYNC_ENGINE_PROCESS_UPDATES_UTIL_H_
 #define SYNC_ENGINE_PROCESS_UPDATES_UTIL_H_
 
+#include <stdint.h>
+
 #include <vector>
 
 #include "sync/internal_api/public/base/model_type.h"
 
 namespace sync_pb {
 class SyncEntity;
 }
 
 namespace syncer {
 
@@ skipping 17 matching lines @@
     ModelType type,
     const SyncEntityList& applicable_updates,
     sessions::StatusController* status,
     UpdateCounters* counters);
 
 // Tombstones all entries of |type| whose versions are older than
 // |version_watermark| unless they are type root or unsynced/unapplied.
 void ExpireEntriesByVersion(syncable::Directory* dir,
                             syncable::ModelNeutralWriteTransaction* trans,
                             ModelType type,
-                            int64 version_watermark);
+                            int64_t version_watermark);
 
 }  // namespace syncer
 
 #endif  // SYNC_ENGINE_PROCESS_UPDATES_UTIL_H_