cros proxy: fix bug to use default port whenever its input field is empty.

chrome/browser/chromeos/proxy_cros_settings_provider.h

 // Copyright (c) 2011 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.
 
 #ifndef CHROME_BROWSER_CHROMEOS_PROXY_CROS_SETTINGS_PROVIDER_H_
 #define CHROME_BROWSER_CHROMEOS_PROXY_CROS_SETTINGS_PROVIDER_H_
 #pragma once
 
 #include "base/memory/singleton.h"
 #include "base/values.h"
@@ skipping 28 matching lines @@
   net::ProxyServer CreateProxyServerFromHost(
       const std::string& host,
       const ProxyConfigServiceImpl::ProxyConfig::ManualProxy& proxy,
       net::ProxyServer::Scheme scheme) const;
 
   net::ProxyServer CreateProxyServerFromPort(
       uint16 port,
       const ProxyConfigServiceImpl::ProxyConfig::ManualProxy& proxy,
       net::ProxyServer::Scheme scheme) const;
 
+  net::ProxyServer CreateProxyServer(
+      std::string host,
+      uint16 port,
+      net::ProxyServer::Scheme scheme) const;
+
   Value* CreateServerHostValue(
       const ProxyConfigServiceImpl::ProxyConfig::ManualProxy& proxy) const;
 
   Value* CreateServerPortValue(
       const ProxyConfigServiceImpl::ProxyConfig::ManualProxy& proxy) const;
 
   Profile* profile_;  // Weak ptr.
 
   DISALLOW_COPY_AND_ASSIGN(ProxyCrosSettingsProvider);
 };
 
 }  // namespace chromeos
 
 #endif  // CHROME_BROWSER_CHROMEOS_PROXY_CROS_SETTINGS_PROVIDER_H_