shill: Initialize portal list to sane default

BUG=chromium-os:27861
TEST=Modified unit test, verified on real system

Change-Id: I77dafefcfd76cc9b5ffe0b23f0b040ba896c2069
Reviewed-on: https://gerrit.chromium.org/gerrit/18282
Reviewed-by: mukesh agrawal <quiche@chromium.org>
Commit-Ready: Paul Stewart <pstew@chromium.org>
Tested-by: Paul Stewart <pstew@chromium.org>
diff --git a/default_profile_unittest.cc b/default_profile_unittest.cc
index a60d37b..c49beb4 100644
--- a/default_profile_unittest.cc
+++ b/default_profile_unittest.cc
@@ -164,7 +164,8 @@
   ASSERT_TRUE(profile_->LoadManagerProperties(&manager_props));
   EXPECT_EQ("", manager_props.host_name);
   EXPECT_FALSE(manager_props.offline_mode);
-  EXPECT_EQ("", manager_props.check_portal_list);
+  EXPECT_EQ(PortalDetector::kDefaultCheckPortalList,
+            manager_props.check_portal_list);
   EXPECT_EQ(PortalDetector::kDefaultURL, manager_props.portal_url);
   EXPECT_EQ(PortalDetector::kDefaultCheckIntervalSeconds,
             manager_props.portal_check_interval_seconds);