Adding socks4 support for chromium. tested for windows and linux....

net/proxy/proxy_server.cc

 // Copyright (c) 2009 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/string_tokenizer.h"
 #include "base/string_util.h"
@@ skipping 29 matching lines @@
 
 // Parse the proxy scheme from a URL-like representation, to a
 // ProxyServer::Scheme.  This corresponds with the values used in
 // ProxyServer::ToURI(). If no type could be matched, returns SCHEME_INVALID.
 ProxyServer::Scheme GetSchemeFromURI(std::string::const_iterator begin,
                                      std::string::const_iterator end) {
   if (LowerCaseEqualsASCII(begin, end, "http"))
     return ProxyServer::SCHEME_HTTP;
   if (LowerCaseEqualsASCII(begin, end, "socks4"))
     return ProxyServer::SCHEME_SOCKS4;
+  if (LowerCaseEqualsASCII(begin, end, "socks"))
+    return ProxyServer::SCHEME_SOCKS4;
   if (LowerCaseEqualsASCII(begin, end, "socks5"))
     return ProxyServer::SCHEME_SOCKS5;
   if (LowerCaseEqualsASCII(begin, end, "direct"))
     return ProxyServer::SCHEME_DIRECT;
   return ProxyServer::SCHEME_INVALID;
 }
 
 }  // namespace
 
 std::string ProxyServer::HostNoBrackets() const {
@@ skipping 151 matching lines @@
   }
 
   // Choose a default port number if none was given.
   if (port == -1)
     port = GetDefaultPortForScheme(scheme);
 
   return ProxyServer(scheme, host, port);
 }
 
 }  // namespace net