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

net/test/base_test_server.cc

 // Copyright 2013 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 "net/test/base_test_server.h"
 
 #include <string>
 #include <vector>
 
 #include "base/base64.h"
@@ skipping 74 matching lines @@
     case CERT_AUTO:
       return base::FilePath();
     default:
       NOTREACHED();
   }
   return base::FilePath();
 }
 
 std::string BaseTestServer::SSLOptions::GetOCSPArgument() const {
   if (server_certificate != CERT_AUTO)
-    return "";
+    return std::string();
 
   switch (ocsp_status) {
     case OCSP_OK:
       return "ok";
     case OCSP_REVOKED:
       return "revoked";
     case OCSP_INVALID:
       return "invalid";
     case OCSP_UNAUTHORIZED:
       return "unauthorized";
     case OCSP_UNKNOWN:
       return "unknown";
     default:
       NOTREACHED();
-      return "";
+      return std::string();
   }
 }
 
 const char BaseTestServer::kLocalhost[] = "127.0.0.1";
 
 BaseTestServer::BaseTestServer(Type type, const std::string& host)
     : type_(type),
       started_(false),
       log_to_console_(false) {
   Init(host);
@@ skipping 269 matching lines @@
 
   return GenerateAdditionalArguments(arguments);
 }
 
 bool BaseTestServer::GenerateAdditionalArguments(
     base::DictionaryValue* arguments) const {
   return true;
 }
 
 }  // namespace net