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

sync/internal_api/public/data_type_association_stats.h

Index: sync/internal_api/public/data_type_association_stats.h
diff --git a/sync/internal_api/public/data_type_association_stats.h b/sync/internal_api/public/data_type_association_stats.h
index f83eddd20b1e9bf11eff5bb338a01c20cfd91a35..344624a87bdf2b766736aee7c584ba3782e5edfb 100644
--- a/sync/internal_api/public/data_type_association_stats.h
+++ b/sync/internal_api/public/data_type_association_stats.h
@@ -1,16 +1,17 @@
-// 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();