cros: Remove some OS platform ifdefs from ash

ash/shell/content/shell_with_content_main.cc

 // Copyright (c) 2012 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 "ash/shell/content/client/shell_main_delegate.h"
 #include "base/at_exit.h"
 #include "base/command_line.h"
 #include "base/files/file_path.h"
 #include "base/path_service.h"
 #include "content/public/app/content_main.h"
 
-#if defined(OS_WIN)
-#include "content/public/app/sandbox_helper_win.h"
-#include "sandbox/win/src/sandbox_types.h"
-#endif
-
-#if defined(OS_WIN)
-int APIENTRY wWinMain(HINSTANCE instance, HINSTANCE, wchar_t*, int) {
-  int argc = 0;
-  char** argv = nullptr;
-#else
 int main(int argc, const char** argv) {
-#endif
   base::CommandLine::Init(argc, argv);
   base::AtExitManager exit_manager;
 
   base::FilePath log_filename;
   PathService::Get(base::DIR_EXE, &log_filename);
   log_filename = log_filename.AppendASCII("ash_shell.log");
   logging::LoggingSettings settings;
   settings.logging_dest = logging::LOG_TO_ALL;
   settings.log_file = log_filename.value().c_str();
   settings.delete_old = logging::DELETE_OLD_LOG_FILE;
   logging::InitLogging(settings);
 
   ash::shell::ShellMainDelegate delegate;
   content::ContentMainParams params(&delegate);
-
-#if defined(OS_WIN)
-  sandbox::SandboxInterfaceInfo sandbox_info = {0};
-  content::InitializeSandboxInfo(&sandbox_info);
-  params.instance = instance;
-  params.sandbox_info = &sandbox_info;
-#else
   params.argc = argc;
   params.argv = argv;
-#endif
 
   return content::ContentMain(params);
 }