[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/default_profile_unittest.cc b/default_profile_unittest.cc
index 79e75e7..5fb188e 100644
--- a/default_profile_unittest.cc
+++ b/default_profile_unittest.cc
@@ -24,7 +24,7 @@
 class DefaultProfileTest : public PropertyStoreTest {
  public:
   DefaultProfileTest()
-      : profile_(new DefaultProfile(&control_interface_,
+      : profile_(new DefaultProfile(control_interface(),
                                     manager(),
                                     FilePath(kTestStoragePath),
                                     properties_)) {