[Offline Pages] Adding metadatas for namespace async_loading.

components/offline_pages/client_policy_controller_unittest.cc

Index: components/offline_pages/client_policy_controller_unittest.cc
diff --git a/components/offline_pages/client_policy_controller_unittest.cc b/components/offline_pages/client_policy_controller_unittest.cc
index 918de56d593bb0cecacdc8e0fe55917f63604417..8d2fc0a892d65c567c1e0c609698ae5deed7a539 100644
--- a/components/offline_pages/client_policy_controller_unittest.cc
+++ b/components/offline_pages/client_policy_controller_unittest.cc
@@ -63,4 +63,10 @@ TEST_F(ClientPolicyControllerTest, CheckLastNDefined) {
   EXPECT_TRUE(isTemporary(policy));
 }
 
+TEST_F(ClientPolicyControllerTest, CheckAsyncDefined) {
+  OfflinePageClientPolicy policy = controller()->GetPolicy(kAsyncNamespace);
+  EXPECT_EQ(policy.name_space, kAsyncNamespace);
+  EXPECT_TRUE(isTemporary(policy));
+}
+
 }  // namespace offline_pages