[Sync] Move //components/sync to the syncer namespace.

components/sync/test/fake_server/tombstone_entity.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/test/fake_server/tombstone_entity.h"
 
 using std::string;
-
 using syncer::ModelType;
 
 namespace fake_server {
 
 TombstoneEntity::~TombstoneEntity() {}
 
 // static
 std::unique_ptr<FakeServerEntity> TombstoneEntity::Create(
     const string& id,
     const string& client_defined_unique_tag) {
@@ skipping 22 matching lines @@
 
 void TombstoneEntity::SerializeAsProto(sync_pb::SyncEntity* proto) const {
   FakeServerEntity::SerializeBaseProtoFields(proto);
 }
 
 bool TombstoneEntity::IsDeleted() const {
   return true;
 }
 
 }  // namespace fake_server