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

content/renderer/p2p/port_allocator.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 "content/renderer/p2p/port_allocator.h"
 
 #include "base/bind.h"
 #include "base/string_number_conversions.h"
 #include "base/string_util.h"
 #include "base/strings/string_split.h"
@@ skipping 264 matching lines @@
     } else if (key == "relay.ssltcp_port") {
       if (!ParsePortNumber(value, &relay_ssltcp_port_))
         return;
     }
   }
 
   AddConfig();
 }
 
 void P2PPortAllocatorSession::AddConfig() {
-  cricket::PortConfiguration* config =
-      new cricket::PortConfiguration(stun_server_address_, "", "");
+  cricket::PortConfiguration* config = new cricket::PortConfiguration(
+      stun_server_address_, std::string(), std::string());
 
   if (allocator_->config_.legacy_relay) {
     // Passing empty credentials for legacy google relay.
     cricket::RelayServerConfig gturn_config(cricket::RELAY_GTURN);
     if (relay_ip_.ip() != 0) {
       if (relay_udp_port_ > 0) {
         talk_base::SocketAddress address(relay_ip_.ip(), relay_udp_port_);
         gturn_config.ports.push_back(cricket::ProtocolAddress(
             address, cricket::PROTO_UDP));
       }
@@ skipping 28 matching lines @@
       // Using the stun resolved address if available for TURN.
       turn_config.ports.push_back(cricket::ProtocolAddress(
           stun_server_address_, cricket::PROTO_UDP));
       config->AddRelay(turn_config);
     }
   }
   ConfigReady(config);
 }
 
 }  // namespace content