Add pending line item support for web payments.

third_party/WebKit/Source/modules/payments/PaymentRequest.cpp

Index: third_party/WebKit/Source/modules/payments/PaymentRequest.cpp
diff --git a/third_party/WebKit/Source/modules/payments/PaymentRequest.cpp b/third_party/WebKit/Source/modules/payments/PaymentRequest.cpp
index 578971e71759787a5919c8b86588a58bbcb4abfd..d11941bf164ffaa82c016285ca623fe5ccf9eaa0 100644
--- a/third_party/WebKit/Source/modules/payments/PaymentRequest.cpp
+++ b/third_party/WebKit/Source/modules/payments/PaymentRequest.cpp
@@ -67,6 +67,7 @@ struct TypeConverter<PaymentItemPtr, blink::PaymentItem> {
     PaymentItemPtr output = PaymentItem::New();
     output->label = input.label();
     output->amount = PaymentCurrencyAmount::From(input.amount());
+    output->pending = input.pending();
     return output;
   }
 };