[PaymentApp] Fix a crash when enabledMethods called.

third_party/WebKit/LayoutTests/http/tests/payments/payment-app-manager.html

Index: third_party/WebKit/LayoutTests/http/tests/payments/payment-app-manager.html
diff --git a/third_party/WebKit/LayoutTests/http/tests/payments/payment-app-manager.html b/third_party/WebKit/LayoutTests/http/tests/payments/payment-app-manager.html
index 5cb34aee4306e5600b83394b2712e965154b2533..dba3cf6a8ecaf650fa1ed366164040e63356914d 100644
--- a/third_party/WebKit/LayoutTests/http/tests/payments/payment-app-manager.html
+++ b/third_party/WebKit/LayoutTests/http/tests/payments/payment-app-manager.html
@@ -190,4 +190,30 @@ promise_test(test => {
         });
   }, 'If there is no manifest data, then throws AbortError.');
 
+promise_test(test => {
+    var registration;
+    var script_url = 'resources/empty-worker.js';
+    var scope = 'resources/';
+
+    return service_worker_unregister_and_register(test, script_url, scope)
+      .then(r => {
+          registration = r;
+          return wait_for_state(test, registration.installing, 'activated');
+        })
+      .then(state => {
+          assert_equals(state, 'activated');
+          return registration.paymentAppManager.setManifest({
+              name: 'Payment App',
+              icon: 'payment-app-icon',
+              options: [{
+                name: 'Visa ****',
+                icon: 'payment-app-icon',
+                id: 'payment-app-id'
+              }]
+            });
+        })
+      .catch(unreached_rejection(test));
+  }, 'enabled_methods of PaymentAppOption is not required member. '
+      + 'so this test should be pass.');
+
 </script>