[shill] Add code for persisting profiles and services to disk.

BUG=chromium-os:17253
TEST=unit

Change-Id: Ic6dbbcb10543da3f4615cb305a77f6b9b301e8bc
Reviewed-on: http://gerrit.chromium.org/gerrit/7633
Reviewed-by: Darin Petkov <petkov@chromium.org>
Tested-by: Chris Masone <cmasone@chromium.org>
diff --git a/wifi_unittest.cc b/wifi_unittest.cc
index 5cb2c76..3ffb266 100644
--- a/wifi_unittest.cc
+++ b/wifi_unittest.cc
@@ -94,7 +94,7 @@
                                              flimflam::kScanningProperty,
                                              PropertyStoreTest::kBoolV,
                                              &error));
-    EXPECT_EQ(invalid_args_, error.name());
+    EXPECT_EQ(invalid_args(), error.name());
   }
 }