Switch from using 'nacl_main' to 'main' entry point

ports/geturl/geturl.cc

 /*
  * Copyright (c) 2014 The Native Client Authors. All rights reserved.
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #define __STDC_FORMAT_MACROS
 
 #include <errno.h>
 #include <fcntl.h>
 #include <inttypes.h>
 #include <stdio.h>
 #include <string.h>
 #include <unistd.h>
 
-#include "nacl_main.h"
-
 #include "ppapi_simple/ps.h"
 
 #include "ppapi/c/pp_errors.h"
 #include "ppapi/cpp/completion_callback.h"
 #include "ppapi/cpp/instance_handle.h"
 #include "ppapi/cpp/module.h"
 #include "ppapi/cpp/url_loader.h"
 #include "ppapi/cpp/url_request_info.h"
 #include "ppapi/cpp/url_response_info.h"
 
@@ skipping 91 matching lines @@
   return 0;
 
 fail:
   result = remove(dst);
   if (result < 0) {
     fprintf(stderr, "ERROR: Failed removing file (%d): %s\n", errno, dst);
   }
   return 1;
 }
 
-int nacl_main(int argc, char *argv[]) {
+int main(int argc, char *argv[]) {
   if (argc == 4 && strcmp(argv[1], "-q") == 0) {
     return Download(1, argv[2], argv[3]);
   } else if (argc == 3) {
     return Download(0, argv[1], argv[2]);
   }
   fprintf(stderr, "USAGE: %s [-q] <url> <dst>\n", argv[0]);
   fprintf(stderr, "\n");
   fprintf(stderr, "-q = quiet mode\n");
   fprintf(stderr, "\n");
   fprintf(stderr, "NOTE: This utility can only be used to download URLs\n");
   fprintf(stderr, "from the same origin or that have been whitelisted\n");
   fprintf(stderr, "in an extension manifest\n");
   return 1;
 }