PaymentRequest: Remove id attribute from PaymentItem.

third_party/WebKit/public/platform/modules/payments/payment_request.mojom

 // Copyright 2016 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 [JavaPackage="org.chromium.mojom.payments"]
 module blink.mojom;
 
 // The shipping address that the browser process provides to the renderer
 // process. Built either by the browser or a payment app.
 struct ShippingAddress {
@@ skipping 50 matching lines @@
 struct CurrencyAmount {
   // ISO 4217 currency code. Three upper case ASCII letters.
   string currency_code;
 
   // ISO 20022 CurrencyAnd30Amount. Up to 30 total digits. Up to 10 fraction
   // digits. Separated by a dot.
   string value;
 };
 
 struct PaymentItem {
-  string id;
   string label;
   CurrencyAmount amount;
 };
 
 struct ShippingOption {
   string id;
   string label;
   CurrencyAmount amount;
 };
 
@@ skipping 18 matching lines @@
        // object to the payment app, for example Android Pay. There's no one
        // format for this object, so richer types cannot be used. A simple
        // example:
        //
        // {"https://android.com/pay": {"gateway": "stripe"}}
        string stringified_data);
   UpdateWith(PaymentDetails details);
   Abort();
   Complete(bool success);
 };