[Payment Request] Moves PaymentRequest into the payments namespace

ios/chrome/browser/ui/payments/payment_items_display_coordinator.h

Index: ios/chrome/browser/ui/payments/payment_items_display_coordinator.h
diff --git a/ios/chrome/browser/ui/payments/payment_items_display_coordinator.h b/ios/chrome/browser/ui/payments/payment_items_display_coordinator.h
index cebc72d5f05490924893fdf8500fa4187cbaf2ad..e1c3dbf73461aa9199b6bbcac6984e5852f91312 100644
--- a/ios/chrome/browser/ui/payments/payment_items_display_coordinator.h
+++ b/ios/chrome/browser/ui/payments/payment_items_display_coordinator.h
@@ -11,7 +11,9 @@
 #import "ios/chrome/browser/chrome_coordinator.h"
 #import "ios/chrome/browser/ui/payments/payment_items_display_view_controller.h"
 
+namespace payments {
 class PaymentRequest;
+}  // namespace payments
 
 @class PaymentItemsDisplayCoordinator;
 
@@ -38,7 +40,7 @@ class PaymentRequest;
 // The PaymentRequest object having a copy of web::PaymentRequest as provided by
 // the page invoking the Payment Request API. This pointer is not owned by this
 // class and should outlive it.
-@property(nonatomic, assign) PaymentRequest* paymentRequest;
+@property(nonatomic, assign) payments::PaymentRequest* paymentRequest;
 
 // The delegate to be notified when the user selects touches the return button
 // or the pay button.