PaymentRequest: Add support for shipping type. (in blink side)

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

Index: third_party/WebKit/Source/modules/payments/PaymentOptions.idl
diff --git a/third_party/WebKit/Source/modules/payments/PaymentOptions.idl b/third_party/WebKit/Source/modules/payments/PaymentOptions.idl
index 2dd9b3910935ac8b3d0441e30125b5df453c18dd..2cdbe0dc893c9eb46918991d15de86cf3613c9d4 100644
--- a/third_party/WebKit/Source/modules/payments/PaymentOptions.idl
+++ b/third_party/WebKit/Source/modules/payments/PaymentOptions.idl
@@ -4,10 +4,17 @@
 
 // https://w3c.github.io/browser-payment-api/#paymentoptions-dictionary
 
+enum PaymentShippingType {
+    "shipping",
+    "delivery",
+    "pickup"
+};
+
 [
     RuntimeEnabled=PaymentRequest
 ] dictionary PaymentOptions {
     boolean requestPayerEmail = false;
     boolean requestPayerPhone = false;
     boolean requestShipping = false;
+    DOMString shippingType = "shipping";
 };