Revert of Include sync.pb.h in sync_data.h.

sync/api/sync_data.h

 // Copyright 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.
 
 #ifndef SYNC_API_SYNC_DATA_H_
 #define SYNC_API_SYNC_DATA_H_
 
 #include <iosfwd>
 #include <string>
 #include <vector>
 
 #include "base/basictypes.h"
 #include "base/time/time.h"
 #include "sync/base/sync_export.h"
 #include "sync/internal_api/public/base/model_type.h"
 #include "sync/internal_api/public/util/immutable.h"
-#include "sync/protocol/sync.pb.h"
 
 namespace sync_pb {
 class EntitySpecifics;
 class SyncEntity;
 }  // namespace sync_pb
 
 namespace syncer {
 
 // A light-weight container for immutable sync data. Pass-by-value and storage
 // in STL containers are supported and encouraged if helpful.
@@ skipping 102 matching lines @@
 };
 
 // gmock printer helper.
 void PrintTo(const SyncData& sync_data, std::ostream* os);
 
 typedef std::vector<SyncData> SyncDataList;
 
 }  // namespace syncer
 
 #endif  // SYNC_API_SYNC_DATA_H_