[Sync] Removing duplicated includes between cc and h files.

components/sync/engine_impl/directory_update_handler.cc

 // Copyright 2014 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.
 
 #include "components/sync/engine_impl/directory_update_handler.h"
 
 #include <stdint.h>
 
 #include <vector>
 
 #include "components/sync/base/data_type_histogram.h"
 #include "components/sync/engine_impl/conflict_resolver.h"
 #include "components/sync/engine_impl/cycle/directory_type_debug_info_emitter.h"
 #include "components/sync/engine_impl/cycle/status_controller.h"
-#include "components/sync/engine_impl/process_updates_util.h"
 #include "components/sync/engine_impl/update_applicator.h"
 #include "components/sync/syncable/directory.h"
 #include "components/sync/syncable/model_neutral_mutable_entry.h"
 #include "components/sync/syncable/syncable_changes_version.h"
 #include "components/sync/syncable/syncable_model_neutral_write_transaction.h"
 #include "components/sync/syncable/syncable_write_transaction.h"
 
 namespace syncer {
 
 using syncable::SYNCER;
@@ skipping 277 matching lines @@
            new_gc_directive.version_watermark())) {
     ExpireEntriesByVersion(dir_, trans, type_,
                            new_gc_directive.version_watermark());
   }
 
   cached_gc_directive_.reset(
       new sync_pb::GarbageCollectionDirective(new_gc_directive));
 }
 
 }  // namespace syncer