PaymentRequest.abort() should return a promise.

third_party/WebKit/LayoutTests/payments/payment-request-interface.html

Index: third_party/WebKit/LayoutTests/payments/payment-request-interface.html
diff --git a/third_party/WebKit/LayoutTests/payments/payment-request-interface.html b/third_party/WebKit/LayoutTests/payments/payment-request-interface.html
index 8bdec6d5803b28a472c60afda0f8825ea45029db..b8cfbeb18f7f2ca94c61b0db4769ecf2a5b7ff94 100644
--- a/third_party/WebKit/LayoutTests/payments/payment-request-interface.html
+++ b/third_party/WebKit/LayoutTests/payments/payment-request-interface.html
@@ -181,6 +181,10 @@ test(function() {
     });
 }, 'Absence of total should throw TypeError.');
 
+promise_test(function(t) {
+    return promise_rejects(t, null, new PaymentRequest(['foo'], buildDetails()).abort());
+}, 'abort() without show() should reject with error');
+
 generate_tests(assert_throws, [
     ['PaymentRequest constructor should throw for incorrect parameter types.', null, function() {
         new PaymentRequest('', '', '', '')
@@ -206,9 +210,6 @@ generate_tests(assert_throws, [
     ['Null shipping options should throw', new TypeError(), function() {
         new PaymentRequest(['foo'], {'total': buildItem(), 'displayItems': [buildItem()], 'shippingOptions': null});
     }],
-    ['Aborting before showing should throw.', null, function() {
-        new PaymentRequest(['foo'], buildDetails()).abort()
-    }],
 
     // Payment method specific data should be a JSON-serializable object.
     ['Array value for payment method specific data parameter should throw', null, function() {