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

chrome/browser/extensions/extension_test_message_listener.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/extension_test_message_listener.h"
 
 #include "base/strings/string_number_conversions.h"
 #include "chrome/browser/extensions/api/test/test_api.h"
 #include "chrome/common/chrome_notification_types.h"
 #include "chrome/test/base/ui_test_utils.h"
 #include "content/public/browser/notification_service.h"
 
 ExtensionTestMessageListener::ExtensionTestMessageListener(
     const std::string& expected_message,
     bool will_reply)
     : expected_message_(expected_message),
       satisfied_(false),
       waiting_(false),
       will_reply_(will_reply),
-      failure_message_(""),
       failed_(false) {
   registrar_.Add(this, chrome::NOTIFICATION_EXTENSION_TEST_MESSAGE,
                  content::NotificationService::AllSources());
 }
 
 ExtensionTestMessageListener::~ExtensionTestMessageListener() {}
 
 bool ExtensionTestMessageListener::WaitUntilSatisfied()  {
   if (satisfied_)
     return !failed_;
@@ skipping 21 matching lines @@
   const std::string& content = *content::Details<std::string>(details).ptr();
   if (!satisfied_ && (content == expected_message_ ||
       (!failure_message_.empty() && (content == failure_message_)))) {
     if (!failed_)
       failed_ = (content == failure_message_);
     function_ = content::Source<extensions::TestSendMessageFunction>(
         source).ptr();
     satisfied_ = true;
     registrar_.RemoveAll();  // Stop listening for more messages.
     if (!will_reply_) {
-      function_->Reply("");
+      function_->Reply(std::string());
       function_ = NULL;
     }
     if (waiting_) {
       waiting_ = false;
       MessageLoopForUI::current()->Quit();
     }
   }
 }