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

chrome/browser/net/dns_probe_job_unittest.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/net/dns_probe_job.h"
 
 #include "base/basictypes.h"
 #include "base/message_loop.h"
 #include "base/run_loop.h"
 #include "net/base/net_log.h"
@@ skipping 36 matching lines @@
   DnsConfig config;
   config.nameservers.clear();
   IPAddressNumber dns_ip;
   ParseIPLiteralToNumber("192.168.1.1", &dns_ip);
   const uint16 kDnsPort = net::dns_protocol::kDefaultPort;
   config.nameservers.push_back(IPEndPoint(dns_ip, kDnsPort));
 
   const uint16 kTypeA = net::dns_protocol::kTypeA;
   MockDnsClientRuleList rules;
   rules.push_back(MockDnsClientRule("google.com", kTypeA, good_result));
-  rules.push_back(MockDnsClientRule("", kTypeA, bad_result));
+  rules.push_back(MockDnsClientRule(std::string(), kTypeA, bad_result));
 
   scoped_ptr<DnsClient> dns_client = CreateMockDnsClient(config, rules);
   dns_client->SetConfig(config);
 
   NetLog* net_log = NULL;
   DnsProbeJob::CallbackType callback = base::Bind(
       &DnsProbeJobTest::OnProbeFinished,
       base::Unretained(this));
 
   // Need to set these before creating job, because it can call the callback
@@ skipping 50 matching lines @@
     const TestCase* test_case = &kTestCases[i];
     RunProbe(test_case->good_result, test_case->bad_result);
     EXPECT_TRUE(callback_called_);
     EXPECT_EQ(test_case->expected_probe_result, callback_result_);
   }
 }
 
 }  // namespace
 
 }  // namespace chrome_browser_net