Cleanup: Pass std::string as const reference if possible

sync/test/fake_server/fake_server_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 "sync/test/fake_server/fake_server_entity.h"
 
 #include <limits>
 #include <string>
 #include <vector>
 
@@ skipping 40 matching lines @@
 }
 
 void FakeServerEntity::SetVersion(int64 version) {
   version_ = version;
 }
 
 const std::string& FakeServerEntity::GetName() const {
   return name_;
 }
 
-void FakeServerEntity::SetName(std::string name) {
+void FakeServerEntity::SetName(const std::string& name) {
   name_ = name;
 }
 
 void FakeServerEntity::SetSpecifics(
     const sync_pb::EntitySpecifics& updated_specifics) {
   specifics_ = updated_specifics;
 }
 
 bool FakeServerEntity::IsDeleted() const {
   return false;
@@ skipping 55 matching lines @@
   sync_entity->set_id_string(id_);
   sync_entity->set_version(version_);
   sync_entity->set_name(name_);
 
   // Data via accessors
   sync_entity->set_deleted(IsDeleted());
   sync_entity->set_folder(IsFolder());
 }
 
 }  // namespace fake_server