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

sync/internal_api/public/sessions/sync_source_info.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_SESSIONS_SYNC_SOURCE_INFO_H_
 #define SYNC_INTERNAL_API_PUBLIC_SESSIONS_SYNC_SOURCE_INFO_H_
 
 #include "base/basictypes.h"
+#include "sync/base/sync_export.h"
 #include "sync/internal_api/public/base/model_type.h"
 #include "sync/internal_api/public/base/model_type_invalidation_map.h"
 #include "sync/protocol/sync.pb.h"
 
 namespace base {
 class DictionaryValue;
 }
 
 namespace syncer {
 namespace sessions {
 
 // A container for the source of a sync session. This includes the update
 // source, the datatypes triggering the sync session, and possible session
 // specific payloads which should be sent to the server.
-struct SyncSourceInfo {
+struct SYNC_EXPORT SyncSourceInfo {
   SyncSourceInfo();
   explicit SyncSourceInfo(const ModelTypeInvalidationMap& t);
   SyncSourceInfo(
       const sync_pb::GetUpdatesCallerInfo::GetUpdatesSource& u,
       const ModelTypeInvalidationMap& t);
   ~SyncSourceInfo();
 
   // Caller takes ownership of the returned dictionary.
   base::DictionaryValue* ToValue() const;
 
   sync_pb::GetUpdatesCallerInfo::GetUpdatesSource updates_source;
   ModelTypeInvalidationMap types;
 };
 
 }  // namespace sessions
 }  // namespace syncer
 
 #endif  // SYNC_INTERNAL_API_PUBLIC_SESSIONS_SYNC_SOURCE_INFO_H_