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

remoting/protocol/jingle_session_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 "remoting/protocol/jingle_session.h"
 
 #include "base/bind.h"
 #include "base/message_loop.h"
 #include "base/time.h"
 #include "base/test/test_timeouts.h"
@@ skipping 305 matching lines @@
   InitiateConnection(1, FakeAuthenticator::ACCEPT, false);
 
   // Verify that the client specified correct initiator value.
   ASSERT_GT(host_signal_strategy_->received_messages().size(), 0U);
   const buzz::XmlElement* initiate_xml =
       host_signal_strategy_->received_messages().front();
   const buzz::XmlElement* jingle_element =
       initiate_xml->FirstNamed(buzz::QName(kJingleNamespace, "jingle"));
   ASSERT_TRUE(jingle_element);
   ASSERT_EQ(kClientJid,
-            jingle_element->Attr(buzz::QName("", "initiator")));
+            jingle_element->Attr(buzz::QName(std::string(), "initiator")));
 }
 
 // Verify that we can connect two endpoints with multi-step authentication.
 TEST_F(JingleSessionTest, ConnectWithMultistep) {
   CreateSessionManagers(3, FakeAuthenticator::ACCEPT);
   InitiateConnection(3, FakeAuthenticator::ACCEPT, false);
 }
 
 // Verify that connection is terminated when single-step auth fails.
 TEST_F(JingleSessionTest, ConnectWithBadAuth) {
@@ skipping 89 matching lines @@
       .Times(AtMost(1));
   ExpectRouteChange(kChannelName);
 
   message_loop_->Run();
 
   EXPECT_TRUE(!host_socket_.get());
 }
 
 }  // namespace protocol
 }  // namespace remoting