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

ports/ipython-ppapi/kernel.cc

Index: ports/ipython-ppapi/kernel.cc
diff --git a/ports/ipython-ppapi/kernel.cc b/ports/ipython-ppapi/kernel.cc
index 98d9667322afef91c2730af287340ea5dc2111c8..9bb7fb9650b6b8e5b2e41fb78f694a1c162356e7 100644
--- a/ports/ipython-ppapi/kernel.cc
+++ b/ports/ipython-ppapi/kernel.cc
@@ -1,4 +1,4 @@
-/* Copyright (c) 2014 Google Inc. All rights reserved.
+/* 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. */
 
@@ -16,7 +16,6 @@
 #include "ppapi_simple/ps_interface.h"
 
 #include "nacl_io/nacl_io.h"
-#include "ppapi_simple/ps_main.h"
 #include "ppapi_simple/ps_instance.h"
 
 #ifdef __pnacl__
@@ -145,7 +144,7 @@ static PyMethodDef PPMessageMethods[] = {
   {NULL, NULL, 0, NULL}
 };
 
-int ipython_kernel_main(int argc, char **argv) {
+int main(int argc, char **argv) {
   printf("Setting up unix environment...\n");
   if (setup_unix_environment()) {
     printf("Error: %s\n", strerror(errno));
@@ -181,5 +180,3 @@ int ipython_kernel_main(int argc, char **argv) {
 
   return 0;
 }
-
-PPAPI_SIMPLE_REGISTER_MAIN(ipython_kernel_main)