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

chrome/common/extensions/features/api_feature.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 "chrome/common/extensions/features/api_feature.h"
 
 namespace extensions {
 
 APIFeature::APIFeature() : internal_(false) {
 }
 
 APIFeature::~APIFeature() {
 }
 
 bool APIFeature::IsInternal() const {
   return internal_;
 }
 
 std::string APIFeature::Parse(const DictionaryValue* value) {
   std::string error = SimpleFeature::Parse(value);
   if (!error.empty())
     return error;
 
   value->GetBoolean("internal", &internal_);
 
   if (GetContexts()->empty())
     return name() + ": API features must specify at least one context.";
 
-  return "";
+  return std::string();
 }
 
 }  // namespace