Restructure sandbox code to reduce dependencies pulled in by intercept code.

sandbox/win/src/nt_internals.h

Index: sandbox/win/src/nt_internals.h
diff --git a/sandbox/win/src/nt_internals.h b/sandbox/win/src/nt_internals.h
index 1423be4937db7a0214a4d113340a084655743665..e0c74ac1fb4e3736d13e774e5496c29e04ef2cdf 100644
--- a/sandbox/win/src/nt_internals.h
+++ b/sandbox/win/src/nt_internals.h
@@ -1,4 +1,4 @@
-// Copyright (c) 2006-2010 The Chromium Authors. All rights reserved.
+// Copyright 2013 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.
 
@@ -601,6 +601,11 @@ typedef size_t  (__cdecl *strlenFunction)(
 typedef size_t (__cdecl *wcslenFunction)(
   IN const wchar_t* _Str);
 
+typedef void* (__cdecl *memcpyFunction)(
+  IN void* dest,
+  IN const void* src,
+  IN size_t count);
+
 typedef NTSTATUS (WINAPI *RtlAnsiStringToUnicodeStringFunction)(
   IN OUT PUNICODE_STRING  DestinationString,
   IN PANSI_STRING  SourceString,