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

net/ssl/server_bound_cert_service.cc

Index: net/ssl/server_bound_cert_service.cc
diff --git a/net/ssl/server_bound_cert_service.cc b/net/ssl/server_bound_cert_service.cc
index bed97cfd8bf4d2e7f4115cdc60f7fbfb291ea62c..3a50ed6cb54022f4bb41c5a556eebe4640109b1a 100644
--- a/net/ssl/server_bound_cert_service.cc
+++ b/net/ssl/server_bound_cert_service.cc
@@ -579,8 +579,11 @@ void ServerBoundCertService::GotServerBoundCert(
     delete worker;
     // TODO(rkn): Log to the NetLog.
     LOG(ERROR) << "ServerBoundCertServiceWorker couldn't be started.";
-    HandleResult(ERR_INSUFFICIENT_RESOURCES, server_identifier,
-                 CLIENT_CERT_INVALID_TYPE, "", "");
+    HandleResult(ERR_INSUFFICIENT_RESOURCES,
+                 server_identifier,
+                 CLIENT_CERT_INVALID_TYPE,
+                 std::string(),
+                 std::string());
     return;
   }
 }
@@ -610,7 +613,11 @@ void ServerBoundCertService::GeneratedServerBoundCert(
     HandleResult(error, server_identifier, cert->type(), cert->private_key(),
                  cert->cert());
   } else {
-    HandleResult(error, server_identifier, CLIENT_CERT_INVALID_TYPE, "", "");
+    HandleResult(error,
+                 server_identifier,
+                 CLIENT_CERT_INVALID_TYPE,
+                 std::string(),
+                 std::string());
   }
 }