Get rid of internal content includes for sandbox code from chrome.

chrome/nacl/nacl_main_platform_delegate_mac.mm

 // 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 "chrome/nacl/nacl_main_platform_delegate.h"
 
 #import <Cocoa/Cocoa.h>
 #include "base/command_line.h"
 #include "base/file_path.h"
 #include "base/logging.h"
 #include "base/native_library.h"
 #include "chrome/common/chrome_sandbox_type_mac.h"
 #include "chrome/common/chrome_switches.h"
-#include "content/common/sandbox_mac.h"
 #include "content/public/common/sandbox_init.h"
 
 NaClMainPlatformDelegate::NaClMainPlatformDelegate(
     const content::MainFunctionParams& parameters)
     : parameters_(parameters), sandbox_test_module_(NULL) {
 }
 
 NaClMainPlatformDelegate::~NaClMainPlatformDelegate() {
 }
 
@@ skipping 48 matching lines @@
       result = (*run_security_tests)();
     } else {
       VLOG(1) << "Failed to get NaCl sandbox test function";
       result = false;
     }
     base::UnloadNativeLibrary(sandbox_test_module_);
     sandbox_test_module_ = NULL;
   }
   return result;
 }