Follow-up to https://codereview.chromium.org/938853002

net/tools/quic/quic_client_bin.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.
 
 // A binary wrapper for QuicClient.
 // Connects to a host using QUIC, sends a request to the provided URL, and
 // displays the response.
 //
 // Some usage examples:
 //
@@ skipping 107 matching lines @@
         "handshake is not considered a failure\n"
         "--redirect_is_success       if specified an HTTP response code of 3xx "
         "is considered to be a successful response, otherwise a failure\n";
     cout << help_str;
     exit(0);
   }
   if (line->HasSwitch("host")) {
     FLAGS_host = line->GetSwitchValueASCII("host");
   }
   if (line->HasSwitch("port")) {
-    int port;
-    if (base::StringToInt(line->GetSwitchValueASCII("port"), &port)) {
-      FLAGS_port = port;
-    } else {
+    if (!base::StringToInt(line->GetSwitchValueASCII("port"), &FLAGS_port)) {
       std::cerr << "--port must be an integer\n";
       return 1;
     }
   }
   if (line->HasSwitch("body")) {
     FLAGS_body = line->GetSwitchValueASCII("body");
   }
   if (line->HasSwitch("headers")) {
     FLAGS_headers = line->GetSwitchValueASCII("headers");
   }
@@ skipping 138 matching lines @@
       return 0;
     } else {
       cout << "Request failed (redirect " << response_code << ")." << endl;
       return 1;
     }
   } else {
     cerr << "Request failed (" << response_code << ")." << endl;
     return 1;
   }
 }