Reland of [chromedriver] Listen on IPv6 on IPv6-only hosts (part 2).

chrome/test/chromedriver/net/net_util.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/test/chromedriver/net/net_util.h"
 
 #include <memory>
 
 #include "base/bind.h"
 #include "base/bind_helpers.h"
@@ skipping 45 matching lines @@
   std::string* response_;
   base::WaitableEvent event_;
   std::unique_ptr<net::URLFetcher> fetcher_;
   bool success_;
 };
 
 }  // namespace
 
 NetAddress::NetAddress() : port_(-1) {}
 
-NetAddress::NetAddress(int port) : host_("127.0.0.1"), port_(port) {}
+NetAddress::NetAddress(int port) : host_("localhost"), port_(port) {}
 
 NetAddress::NetAddress(const std::string& host, int port)
     : host_(host), port_(port) {}
 
 NetAddress::~NetAddress() {}
 
 bool NetAddress::IsValid() const {
   return port_ >= 0 && port_ < (1 << 16);
 }
 
 std::string NetAddress::ToString() const {
   return host_ + base::StringPrintf(":%d", port_);
 }
 
 const std::string& NetAddress::host() const {
   return host_;
 }
 
 int NetAddress::port() const {
   return port_;
 }
 
 bool FetchUrl(const std::string& url,
               URLRequestContextGetter* getter,
               std::string* response) {
   return SyncUrlFetcher(GURL(url), getter, response).Fetch();
 }