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

chrome/browser/extensions/component_loader.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/browser/extensions/component_loader.h"
 
 #include "base/command_line.h"
 #include "base/file_util.h"
 #include "base/json/json_string_value_serializer.h"
 #include "base/path_service.h"
@@ skipping 119 matching lines @@
   return Add(manifest_contents, root_directory);
 }
 
 std::string ComponentLoader::Add(const std::string& manifest_contents,
                                  const base::FilePath& root_directory) {
   // The Value is kept for the lifetime of the ComponentLoader. This is
   // required in case LoadAll() is called again.
   DictionaryValue* manifest = ParseManifest(manifest_contents);
   if (manifest)
     return Add(manifest, root_directory);
-  return "";
+  return std::string();
 }
 
 std::string ComponentLoader::Add(const DictionaryValue* parsed_manifest,
                                  const base::FilePath& root_directory) {
   ComponentExtensionInfo info(parsed_manifest, root_directory);
   component_extensions_.push_back(info);
   if (extension_service_->is_ready())
     Load(info);
   return info.extension_id;
 }
@@ skipping 325 matching lines @@
 void ComponentLoader::RegisterUserPrefs(PrefRegistrySyncable* registry) {
   registry->RegisterStringPref(prefs::kEnterpriseWebStoreURL,
                                std::string() /* default_value */,
                                PrefRegistrySyncable::UNSYNCABLE_PREF);
   registry->RegisterStringPref(prefs::kEnterpriseWebStoreName,
                                std::string() /* default_value */,
                                PrefRegistrySyncable::UNSYNCABLE_PREF);
 }
 
 }  // namespace extensions