Revert of Build services as standalone executables

services/service_manager/standalone/desktop/main_helper.cc

 // Copyright 2015 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 "services/service_manager/standalone/desktop/main_helper.h"
 
 #include "base/at_exit.h"
 #include "base/base_switches.h"
 #include "base/command_line.h"
 #include "base/debug/debugger.h"
 #include "base/files/file_path.h"
 #include "base/logging.h"
 #include "base/process/launch.h"
 #include "base/stl_util.h"
 #include "base/strings/string_split.h"
 #include "base/strings/utf_string_conversions.h"
 #include "services/service_manager/runner/common/switches.h"
+#include "services/service_manager/runner/host/child_process.h"
 #include "services/service_manager/runner/init.h"
 #include "services/service_manager/standalone/desktop/launcher_process.h"
 
 #if defined(OS_WIN)
 #include <windows.h>
 #elif (OS_POSIX)
 #include <unistd.h>
 #endif
 
 namespace service_manager {
 
 int StandaloneServiceManagerMain(int argc, char** argv) {
   base::CommandLine::Init(argc, argv);
+  const base::CommandLine& command_line =
+      *base::CommandLine::ForCurrentProcess();
 
   base::AtExitManager at_exit;
   InitializeLogging();
   WaitForDebuggerIfNecessary();
 
 #if !defined(OFFICIAL_BUILD) && defined(OS_WIN)
   base::RouteStdioToConsole(false);
 #endif
 
+  if (command_line.HasSwitch(switches::kChildProcess))
+    return ChildProcessMain();
+
   return LauncherProcessMain();
 }
 
 }  // namespace service_manager