More Windows build fixes, some tidying in mojo_main

mojo/shell/domain_socket/net_errors.cc

 // Copyright 2014 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 "mojo/shell/domain_socket/net_errors.h"
 
 #include <errno.h>
 #include <stdlib.h>
+#if defined(OS_POSIX)
 #include <unistd.h>
+#endif
+#if defined(OS_WIN)
+#include <winsock2.h>
+#define EDQUOT WSAEDQUOT
+#define EHOSTDOWN WSAEHOSTDOWN
+#define EUSERS WSAEUSERS
+#endif
 
 #include <string>
 
 #include "base/basictypes.h"
 #include "base/files/file.h"
 #include "base/logging.h"
 
 namespace mojo {
 namespace shell {
 namespace net {
@@ skipping 131 matching lines @@
     default:
       LOG(WARNING) << "Unknown error " << os_error
                    << " mapped to net::ERR_FAILED";
       return ERR_FAILED;
   }
 }
 
 }  // namespace net
 }  // namespace shell
 }  // namespace mojo