Rewrite std::string("") to std::string(), Linux edition.

sync/syncable/model_type.cc

 // Copyright (c) 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.
 
 #include "sync/internal_api/public/base/model_type.h"
 
 #include "base/strings/string_split.h"
 #include "base/values.h"
 #include "sync/protocol/app_notification_specifics.pb.h"
 #include "sync/protocol/app_setting_specifics.pb.h"
@@ skipping 505 matching lines @@
 
 base::StringValue* ModelTypeToValue(ModelType model_type) {
   if (model_type >= FIRST_REAL_MODEL_TYPE) {
     return new base::StringValue(ModelTypeToString(model_type));
   } else if (model_type == TOP_LEVEL_FOLDER) {
     return new base::StringValue("Top-level folder");
   } else if (model_type == UNSPECIFIED) {
     return new base::StringValue("Unspecified");
   }
   NOTREACHED();
-  return new base::StringValue("");
+  return new base::StringValue(std::string());
 }
 
 ModelType ModelTypeFromValue(const base::Value& value) {
   if (value.IsType(base::Value::TYPE_STRING)) {
     std::string result;
     CHECK(value.GetAsString(&result));
     return ModelTypeFromString(result);
   } else if (value.IsType(base::Value::TYPE_INTEGER)) {
     int result;
     CHECK(value.GetAsInteger(&result));
@@ skipping 335 matching lines @@
 
 bool IsRealDataType(ModelType model_type) {
   return model_type >= FIRST_REAL_MODEL_TYPE && model_type < MODEL_TYPE_COUNT;
 }
 
 bool IsActOnceDataType(ModelType model_type) {
   return model_type == HISTORY_DELETE_DIRECTIVES;
 }
 
 }  // namespace syncer