Revert of Build services as standalone executables

services/service_manager/background/background_service_manager_main.cc

 // Copyright 2016 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/background/background_service_manager_main.h"
 
 #include "base/at_exit.h"
 #include "base/command_line.h"
 #include "base/debug/debugger.h"
 #include "base/process/launch.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"
 
+namespace service_manager {
+namespace {
+
+int RunChildProcess() {
+  base::AtExitManager at_exit;
+  InitializeLogging();
+  WaitForDebuggerIfNecessary();
+#if !defined(OFFICIAL_BUILD) && defined(OS_WIN)
+  base::RouteStdioToConsole(false);
+#endif
+  return ChildProcessMain();
+}
+
+}  // namespace
+}  // namespace service_manager
+
 int main(int argc, char** argv) {
+  base::CommandLine::Init(argc, argv);
+  if (base::CommandLine::ForCurrentProcess()->HasSwitch(
+          switches::kChildProcess)) {
+    return service_manager::RunChildProcess();
+  }
+  // Reset CommandLine as most likely main() is going to use CommandLine too
+  // and expect to be able to initialize it.
+  base::CommandLine::Reset();
   return MasterProcessMain(argc, argv);
 }