Selected shipping option in payment summary view + shipping option selection view

ios/chrome/browser/payments/payment_request_view_controller.h

Index: ios/chrome/browser/payments/payment_request_view_controller.h
diff --git a/ios/chrome/browser/payments/payment_request_view_controller.h b/ios/chrome/browser/payments/payment_request_view_controller.h
index 311064ab5a6c569d6a7e02ee843081100c1b510b..359216ec25b23f102aa582227bad64147ff3866b 100644
--- a/ios/chrome/browser/payments/payment_request_view_controller.h
+++ b/ios/chrome/browser/payments/payment_request_view_controller.h
@@ -20,6 +20,7 @@ class CreditCard;
 - (void)paymentRequestViewControllerDidConfirm;
 - (void)paymentRequestViewControllerDisplayPaymentItems;
 - (void)paymentRequestViewControllerSelectShippingAddress;
+- (void)paymentRequestViewControllerSelectShippingOption;
 - (void)paymentRequestViewControllerSelectPaymentMethod;
 
 @end
@@ -44,6 +45,9 @@ class CreditCard;
 // The currently selected and displayed shipping address, if any.
 @property(nonatomic, assign) autofill::AutofillProfile* selectedShippingAddress;
 
+// The currently selected and displayed shipping option, if any.
+@property(nonatomic, assign) web::PaymentShippingOption* selectedShippingOption;
+
 // The currently selected and displayed payment method, if any.
 @property(nonatomic, assign) autofill::CreditCard* selectedPaymentMethod;
 
@@ -54,6 +58,10 @@ class CreditCard;
 - (void)updateSelectedShippingAddress:
     (autofill::AutofillProfile*)shippingAddress;
 
+// Sets the selected shipping option and updates the UI.
+- (void)updateSelectedShippingOption:
+    (web::PaymentShippingOption*)shippingOption;
+
 - (instancetype)init NS_DESIGNATED_INITIALIZER;
 
 - (instancetype)initWithStyle:(CollectionViewControllerStyle)style