For Linux, create a ZygoteForkDelegate that uses the nacl_helper executable

chrome/common/nacl_types.h

Index: chrome/common/nacl_types.h
diff --git a/chrome/common/nacl_types.h b/chrome/common/nacl_types.h
index b61d9eff925e2a72b8c5e8c00bee024fbb3d03e4..af2eace9a99bc3882184f4168173fa12b810889d 100644
--- a/chrome/common/nacl_types.h
+++ b/chrome/common/nacl_types.h
@@ -1,4 +1,4 @@
-// Copyright (c) 2009 The Chromium Authors. All rights reserved.
+// Copyright (c) 2011 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.
 
@@ -7,10 +7,15 @@
 #define CHROME_COMMON_NACL_TYPES_H_
 #pragma once
 
+#include "build/build_config.h"
 #if defined(OS_POSIX)
 #include "base/file_descriptor_posix.h"
 #endif
 
+#if defined(OS_WIN)
+#include <windows.h>   // for HANDLE
+#endif
+
 // TODO(gregoryd): add a Windows definition for base::FileDescriptor
 namespace nacl {
 #if defined(OS_WIN)