[sync] Componentize sync: Part 2: Add SYNC_EXPORTs to files in src/sync/

sync/internal_api/public/data_type_association_stats.h

-// Copyright (c) 2012 The Chromium Authors. All rights reserved.
+// 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_INTERNAL_API_PUBLIC_DATA_TYPE_ASSOCIATION_STATS_H_
 #define SYNC_INTERNAL_API_PUBLIC_DATA_TYPE_ASSOCIATION_STATS_H_
 
+#include "sync/base/sync_export.h"
 #include "sync/internal_api/public/base/model_type.h"
 
 namespace syncer {
 
 // Container for datatype association results.
-struct DataTypeAssociationStats {
+struct SYNC_EXPORT DataTypeAssociationStats {
   DataTypeAssociationStats();
   ~DataTypeAssociationStats();
 
   // The datatype that was associated.
   ModelType model_type;
 
   // The state of the world before association.
   int num_local_items_before_association;
   int num_sync_items_before_association;
 
@@ skipping 10 matching lines @@
   int num_sync_items_deleted;
   int num_sync_items_modified;
 
   // Whether a datatype unrecoverable error was encountered during association.
   bool had_error;
 };
 
 }  // namespace syncer
 
 #endif  // SYNC_INTERNAL_API_PUBLIC_DATA_TYPE_ASSOCIATION_STATS_H_