Revert of Build services as standalone executables

services/service_manager/switches.cc

 // Copyright 2013 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/switches.h"
 
 namespace service_manager {
 namespace switches {
 
 // Enable the tracing service.
 const char kEnableTracing[] = "enable-service-manager-tracing";
 
 // Disables the sandbox for debugging.
 const char kNoSandbox[] = "no-sandbox";
 
+// Load apps in a single processes.
+const char kSingleProcess[] = "single-process";
+
 }  // namespace switches
 }  // namespace service_manager