PaymentRequest: Ignore shipping options if there are duplicated IDs.

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 cda7c6a1ad3dc77d1a5f8c659f99f889d4f0e479..2b23b60fd9ed37a112d4501567bed39040b4e81c 100644
--- a/third_party/WebKit/LayoutTests/payments/payment-request-interface.html
+++ b/third_party/WebKit/LayoutTests/payments/payment-request-interface.html
@@ -265,10 +265,6 @@ generate_tests(assert_throws, [
     ['Duplicate supported payment method identifiers should throw TypeError.', null, function() {
         new PaymentRequest([{'supportedMethods': ['foo']}, {'supportedMethods': ['foo']}], buildDetails(), {})
     }],
-    ['Duplicate shipping option identifiers should throw TypeError.', null, function() {
-        var shippingOptions = [buildItem({'id': 'express', 'selected': false}), buildItem({'id': 'express', 'selected': true})];
-        new PaymentRequest([{'supportedMethods': ['foo']}], {'total': buildItem(), 'displayItems': [buildItem()], 'shippingOptions': shippingOptions}, {'requestShipping': true})

[please use gerrit instead, 2016/10/12 01:28:02]

Please add a test 'No shipping option selected for duplicate shipping option
identifiers'. Provide duplicate shipping options IDs, one of which is
'selected'. Then check that request.shippingOption is null.

[zino, 2016/10/12 18:05:24]

Done.

-    }],
     ['Absence of total should throw TypeError.', null, function() {
         new PaymentRequest([{'supportedMethods': ['foo']}], {'displayItems': [buildItem()]})
     }],