Add pending line item support for web payments.

third_party/WebKit/Source/modules/payments/PaymentItem.idl

Index: third_party/WebKit/Source/modules/payments/PaymentItem.idl
diff --git a/third_party/WebKit/Source/modules/payments/PaymentItem.idl b/third_party/WebKit/Source/modules/payments/PaymentItem.idl
index 11811da2b2bfb06184015c89400de642cca3758b..48b92d94e24b17c9219992a34dbfe178164f1639 100644
--- a/third_party/WebKit/Source/modules/payments/PaymentItem.idl
+++ b/third_party/WebKit/Source/modules/payments/PaymentItem.idl
@@ -2,9 +2,10 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-// https://w3c.github.io/browser-payment-api/specs/paymentrequest.html#paymentitem-dictionary
+// https://w3c.github.io/browser-payment-api/#paymentitem-dictionary
 
 dictionary PaymentItem {
     required DOMString label;
     required PaymentCurrencyAmount amount;
+    boolean pending = false;
 };