Use file handles to interact with utility process.

chrome/service/BUILD.gn

 # Copyright 2014 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.
 
 import("//build/config/features.gni")
 
 static_library("service") {
   sources = [
     "cloud_print/cdd_conversion_win.cc",
     "cloud_print/cdd_conversion_win.h",
@@ skipping 26 matching lines @@
     "cloud_print/printer_job_queue_handler.h",
     "net/service_url_request_context_getter.cc",
     "net/service_url_request_context_getter.h",
     "service_ipc_server.cc",
     "service_ipc_server.h",
     "service_main.cc",
     "service_process.cc",
     "service_process.h",
     "service_process_prefs.cc",
     "service_process_prefs.h",
-    "service_utility_process_host.cc",
-    "service_utility_process_host.h",
   ]
 
   deps = [
     "//chrome:strings",
     "//chrome/common",
     "//chrome/common/net",
     "//base",
     "//components/cloud_devices/common",
     "//google_apis",
     "//jingle:notifier",
     "//net",
     "//printing",
     "//skia",
     "//third_party/libjingle"
   ]
 
   if (use_cups) {
     sources += [ "cloud_print/print_system_cups.cc" ]
     configs += [ "//printing:cups" ]
-  } else if (!is_win) {
-    sources += [ "cloud_print/print_system_dummp.cc" ]
+  } else if (is_win) {
+    sources += [
+      "service_utility_process_host.cc",
+      "service_utility_process_host.h",
+    ]
+  } else {
+    sources += [ "cloud_print/print_system_dummy.cc" ]
   }
 }