[shill] Get rid of protected data members in PropertyStoreTest

BUG=chromium-os:19573
TEST=unit
STATUS=Verified

Change-Id: Ib3a2f19abb8cc4aa0e8410fc26bbb60891e35da7
Reviewed-on: http://gerrit.chromium.org/gerrit/7762
Tested-by: Chris Masone <cmasone@chromium.org>
Reviewed-by: Paul Stewart <pstew@chromium.org>
diff --git a/property_store_unittest.cc b/property_store_unittest.cc
index 560563f..3149146 100644
--- a/property_store_unittest.cc
+++ b/property_store_unittest.cc
@@ -65,9 +65,9 @@
     : invalid_args_(Error::GetName(Error::kInvalidArguments)),
       invalid_prop_(Error::GetName(Error::kInvalidProperty)),
       path_(dir_.CreateUniqueTempDir() ? dir_.path().value() : ""),
-      manager_(&control_interface_,
-               &dispatcher_,
-               &glib_,
+      manager_(control_interface(),
+               dispatcher(),
+               glib(),
                run_path(),
                storage_path(),
                string()) {