[Sync] Convert sync to a static library.

components/sync/engine_impl/get_commit_ids.h

 // Copyright 2013 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 COMPONENTS_SYNC_ENGINE_IMPL_GET_COMMIT_IDS_H_
 #define COMPONENTS_SYNC_ENGINE_IMPL_GET_COMMIT_IDS_H_
 
 #include <stddef.h>
 #include <stdint.h>
 
 #include <vector>
 
 #include "components/sync/base/model_type.h"
-#include "components/sync/base/sync_export.h"
 #include "components/sync/syncable/directory.h"
 
 using std::vector;
 
 namespace syncer {
 
 namespace syncable {
 class BaseTransaction;
 }
 
 // Returns up to |max_entries| metahandles of entries that belong to the
 // specified |type| and are ready for commit.
 //
 // This function returns handles in "commit order".  A valid commit ordering is
 // one where server-unknown items are committed parents-first, and deletions
 // are committed children-first.
 //
 // This function also enforces some position ordering constraints that are no
 // longer necessary.  We should relax those constraints.  See crbug.com/287938.
-SYNC_EXPORT void GetCommitIdsForType(syncable::BaseTransaction* trans,
-                                     ModelType type,
-                                     size_t max_entries,
-                                     std::vector<int64_t>* out);
+void GetCommitIdsForType(syncable::BaseTransaction* trans,
+                         ModelType type,
+                         size_t max_entries,
+                         std::vector<int64_t>* out);
 
 }  // namespace syncer
 
 #endif  // COMPONENTS_SYNC_ENGINE_IMPL_GET_COMMIT_IDS_H_