Expose the sandbox related code through the content API. I did a bit of cleanup while I was doing...

content/shell/shell_main.cc

 // 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.
 
 #include "content/app/content_main.h"
 
 #include "content/shell/shell_main_delegate.h"
 #include "sandbox/src/sandbox_types.h"
 
 #if defined(OS_WIN)
-#include "content/app/startup_helper_win.h"
+#include "content/public/app/startup_helper_win.h"
 #endif
 
 #if defined(OS_WIN)
 
 int APIENTRY wWinMain(HINSTANCE instance, HINSTANCE, wchar_t*, int) {
   sandbox::SandboxInterfaceInfo sandbox_info = {0};
   content::InitializeSandboxInfo(&sandbox_info);
   ShellMainDelegate delegate;
   return content::ContentMain(instance, &sandbox_info, &delegate);
 }
 #endif
 
 #if defined(OS_POSIX)
 
 #if defined(OS_MACOSX)
 __attribute__((visibility("default")))
 int main(int argc, const char* argv[]) {
 #else
 int main(int argc, const char** argv) {
 #endif  // OS_MACOSX
 
   ShellMainDelegate delegate;
   return content::ContentMain(argc, argv, &delegate);
 }
 
 #endif  // OS_POSIX