Update from https://crrev.com/305340

net/proxy/proxy_server.cc

 // Copyright (c) 2010 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 "net/proxy/proxy_server.h"
 
 #include <algorithm>
 
+#include "base/basictypes.h"
 #include "base/strings/string_util.h"
 #include "net/base/net_util.h"
 #include "net/http/http_util.h"
 
 namespace net {
 
 namespace {
 
 // Parses the proxy type from a PAC string, to a ProxyServer::Scheme.
 // This mapping is case-insensitive. If no type could be matched
@@ skipping 212 matching lines @@
     int port = -1;
     // If the scheme has a host/port, parse it.
     bool ok = net::ParseHostAndPort(begin, end, &host, &port);
     if (!ok)
       return ProxyServer();  // Invalid -- failed parsing <host>[":"<port>]
 
     // Choose a default port number if none was given.
     if (port == -1)
       port = GetDefaultPortForScheme(scheme);
 
-    host_port_pair = HostPortPair(host, port);
+    host_port_pair = HostPortPair(host, static_cast<uint16>(port));
   }
 
   return ProxyServer(scheme, host_port_pair);
 }
 
 }  // namespace net