PaymentHandler: Merge PaymentAppRequest and PaymentRequestEvent.

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

Index: third_party/WebKit/Source/modules/payments/PaymentAppRequest.idl
diff --git a/third_party/WebKit/Source/modules/payments/PaymentAppRequest.idl b/third_party/WebKit/Source/modules/payments/PaymentAppRequest.idl
index 4cb6aaf0f9f72d57841aadf636947ff982f1248f..57cff55464b41c35b67fa012d15f61f306b9a5af 100644
--- a/third_party/WebKit/Source/modules/payments/PaymentAppRequest.idl
+++ b/third_party/WebKit/Source/modules/payments/PaymentAppRequest.idl
@@ -4,10 +4,14 @@
 
 // https://w3c.github.io/webpayments-payment-apps-api/#idl-def-paymentapprequest
 
+// TODO(zino): Once the spec issue is resolved, we should apply the changes.
+// Please see https://github.com/w3c/payment-handler/pull/162
 dictionary PaymentAppRequest {
-    DOMString origin;
+    DOMString topLevelOrigin;
+    DOMString paymentRequestOrigin;
+    DOMString paymentRequestId;
     sequence<PaymentMethodData> methodData;
     PaymentItem total;
     sequence<PaymentDetailsModifier> modifiers;
-    DOMString optionId;
+    DOMString instrumentKey;
 };