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

remoting/host/host_change_notification_listener_unittest.cc

 // Copyright (c) 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 "remoting/host/host_change_notification_listener.h"
 
 #include <set>
 
 #include "base/bind.h"
 #include "base/memory/ref_counted.h"
@@ skipping 51 matching lines @@
 
   virtual void TearDown() OVERRIDE {
     host_change_notification_listener_.reset();
     EXPECT_TRUE(signal_strategy_listeners_.empty());
   }
 
   scoped_ptr<XmlElement> GetNotificationStanza(std::string operation,
                                                std::string hostId,
                                                std::string botJid) {
     scoped_ptr<XmlElement> stanza(new XmlElement(buzz::QN_IQ));
-    stanza->AddAttr(QName("", "type"), "set");
-    XmlElement* host_changed = new XmlElement(
-        QName(kChromotingXmlNamespace, "host-changed"));
+    stanza->AddAttr(QName(std::string(), "type"), "set");
+    XmlElement* host_changed =
+        new XmlElement(QName(kChromotingXmlNamespace, "host-changed"));
     host_changed->AddAttr(QName(kChromotingXmlNamespace, "operation"),
                           operation);
     host_changed->AddAttr(QName(kChromotingXmlNamespace, "hostid"), hostId);
     stanza->AddElement(host_changed);
     stanza->AddAttr(buzz::QN_FROM, botJid);
     stanza->AddAttr(buzz::QN_TO, kTestJid);
     return stanza.Pass();
   }
 
   MockListener mock_listener_;
@@ skipping 54 matching lines @@
       .Times(0);
   scoped_ptr<XmlElement> stanza = GetNotificationStanza(
       "update", kHostId, kTestBotJid);
   host_change_notification_listener_->OnSignalStrategyIncomingStanza(
       stanza.get());
   message_loop_.PostTask(FROM_HERE, base::Bind(MessageLoop::QuitClosure()));
   message_loop_.Run();
 }
 
 }  // namespace remoting