[Sync] Convert sync to a static library.

components/sync/engine_impl/apply_control_data_updates.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.
 
 #ifndef COMPONENTS_SYNC_ENGINE_IMPL_APPLY_CONTROL_DATA_UPDATES_H_
 #define COMPONENTS_SYNC_ENGINE_IMPL_APPLY_CONTROL_DATA_UPDATES_H_
 
-#include "components/sync/base/sync_export.h"
-
 namespace syncer {
 
 class Cryptographer;
 
 namespace syncable {
 class Directory;
 class MutableEntry;
 class WriteTransaction;
 }
 
-SYNC_EXPORT void ApplyControlDataUpdates(syncable::Directory* dir);
+void ApplyControlDataUpdates(syncable::Directory* dir);
 void ApplyNigoriUpdate(syncable::WriteTransaction* trans,
                        syncable::MutableEntry* const entry,
                        Cryptographer* cryptographer);
 void ApplyControlUpdate(syncable::WriteTransaction* const trans,
                         syncable::MutableEntry* const entry,
                         Cryptographer* cryptographer);
 
 }  // namespace syncer
 
 #endif  // COMPONENTS_SYNC_ENGINE_IMPL_APPLY_CONTROL_DATA_UPDATES_H_