Mark syncer::InvalidationVersionLessThan with SYNC_EXPORT.

sync/notifier/invalidation_util.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.
 //
 // Various utilities for dealing with invalidation data types.
 
 #ifndef SYNC_NOTIFIER_INVALIDATION_UTIL_H_
 #define SYNC_NOTIFIER_INVALIDATION_UTIL_H_
 
 #include <iosfwd>
@@ skipping 22 matching lines @@
 
 namespace syncer {
 
 class Invalidation;
 
 struct SYNC_EXPORT ObjectIdLessThan {
   bool operator()(const invalidation::ObjectId& lhs,
                   const invalidation::ObjectId& rhs) const;
 };
 
-struct InvalidationVersionLessThan {
+struct SYNC_EXPORT InvalidationVersionLessThan {
   bool operator()(const syncer::Invalidation& a,
                   const syncer::Invalidation& b) const;
 };
 
 typedef std::set<invalidation::ObjectId, ObjectIdLessThan> ObjectIdSet;
 
 typedef std::map<invalidation::ObjectId, int, ObjectIdLessThan>
     ObjectIdCountMap;
 
 SYNC_EXPORT bool RealModelTypeToObjectId(ModelType model_type,
@@ skipping 14 matching lines @@
 
 SYNC_EXPORT_PRIVATE ObjectIdSet ModelTypeSetToObjectIdSet(ModelTypeSet models);
 ModelTypeSet ObjectIdSetToModelTypeSet(const ObjectIdSet& ids);
 
 std::string InvalidationToString(
     const invalidation::Invalidation& invalidation);
 
 }  // namespace syncer
 
 #endif  // SYNC_NOTIFIER_INVALIDATION_UTIL_H_