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

remoting/protocol/jingle_session.cc

Index: remoting/protocol/jingle_session.cc
diff --git a/remoting/protocol/jingle_session.cc b/remoting/protocol/jingle_session.cc
index c6a4f22762020485371a0fd0364b6eee1bfbc626..72985c29465cba4f4d39af6543f78c1aa33605e5 100644
--- a/remoting/protocol/jingle_session.cc
+++ b/remoting/protocol/jingle_session.cc
@@ -323,7 +323,8 @@ void JingleSession::OnMessageResponse(
     CloseInternal(SIGNALING_TIMEOUT);
     return;
   } else {
-    const std::string& type = response->Attr(buzz::QName("", "type"));
+    const std::string& type =
+        response->Attr(buzz::QName(std::string(), "type"));
     if (type != "result") {
       LOG(ERROR) << "Received error in response to " << type_str
                  << " message: \"" << response->Str()
@@ -383,7 +384,7 @@ void JingleSession::OnTransportInfoResponse(IqRequest* request,
     return;
   }
 
-  const std::string& type = response->Attr(buzz::QName("", "type"));
+  const std::string& type = response->Attr(buzz::QName(std::string(), "type"));
   if (type != "result") {
     LOG(ERROR) << "Received error in response to transport-info message: \""
                << response->Str() << "\". Terminating the session.";