Send data back from service using IPC, not file.

cloud_print/cloud_print.gyp

Index: cloud_print/cloud_print.gyp
diff --git a/cloud_print/cloud_print.gyp b/cloud_print/cloud_print.gyp
index 30d7e9ffd92a80d4b8a85c339a168a7179c2d9f1..89944497171764690069b9974ec53145ccc9ef17 100644
--- a/cloud_print/cloud_print.gyp
+++ b/cloud_print/cloud_print.gyp
@@ -88,6 +88,7 @@
       'conditions': [
         ['OS=="win"', {
           'sources': [
+            'service/win/service_ipc_unittest.cc',
             'virtual_driver/win/port_monitor/port_monitor_unittest.cc',
           ],
           'dependencies': [
@@ -95,6 +96,13 @@
           ],
         }],
       ],
+      'msvs_settings': {
+        'VCLinkerTool': {
+          'AdditionalDependencies': [
+              'secur32.lib',
+          ],
+        },
+      },
     },
   ],
 }