Send data back from service using IPC, not file.

cloud_print/service/service.gyp

 # 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.
 {
   'target_defaults': {
     'variables': {
       'chromium_code': 1,
       'enable_wexit_time_destructors': 1,
     },
     'include_dirs': [
@@ skipping 17 matching lines @@
       }],
     ],
   },
   'targets': [
     {
       'target_name': 'cloud_print_service_lib',
       'type': 'static_library',
       'dependencies': [
         '<(DEPTH)/base/base.gyp:base',
         '<(DEPTH)/build/temp_gyp/googleurl.gyp:googleurl',
+        '<(DEPTH)/ipc/ipc.gyp:ipc',
         '<(DEPTH)/net/net.gyp:net',
         '<(DEPTH)/printing/printing.gyp:printing',
       ],
       'conditions': [
         ['OS=="win"', {
           'dependencies': [
             '<(DEPTH)/chrome/chrome.gyp:chrome_version_header',
             '<(DEPTH)/chrome/chrome.gyp:launcher_support',
           ],
         }],
       ],
       'sources': [
         'service_state.cc',
         'service_state.h',
         'service_switches.cc',
         'service_switches.h',
         'win/chrome_launcher.cc',
         'win/chrome_launcher.h',
         'win/local_security_policy.cc',
         'win/local_security_policy.h',
         'win/service_controller.cc',
         'win/service_controller.h',
+        'win/service_listener.cc',
+        'win/service_listener.h',
         'win/service_utils.cc',
         'win/service_utils.h',
+        'win/setup_listener.cc',
+        'win/setup_listener.h',
       ],
     },
     {
       'target_name': 'cloud_print_service',
       'type': 'executable',
       'sources': [
         '<(SHARED_INTERMEDIATE_DIR)/cloud_print/cloud_print_service_exe_version.rc',
         'win/cloud_print_service.cc',
         'win/cloud_print_service.rc',
       ],
       'dependencies': [
         'cloud_print_service_lib',
       ],
       'msvs_settings': {
         'VCLinkerTool': {
           'SubSystem': '1',         # Set /SUBSYSTEM:CONSOLE
           'UACExecutionLevel': '2', # /level='requireAdministrator'
           'AdditionalDependencies': [
               'secur32.lib',
           ],
         },
       },
     },
   ],
 }