[Payment Request] Moves PaymentRequest into the payments namespace

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

Index: ios/chrome/browser/ui/payments/address_edit_mediator.h
diff --git a/ios/chrome/browser/ui/payments/address_edit_mediator.h b/ios/chrome/browser/ui/payments/address_edit_mediator.h
index 84cad803aa0d626fd81ffd6adf56e73324703d50..1c41d9db86caa884424a08ffb32affcbc847a7bc 100644
--- a/ios/chrome/browser/ui/payments/address_edit_mediator.h
+++ b/ios/chrome/browser/ui/payments/address_edit_mediator.h
@@ -8,13 +8,16 @@
 #import "ios/chrome/browser/ui/payments/payment_request_edit_view_controller_data_source.h"
 #import "ios/chrome/browser/ui/payments/region_data_loader.h"
 
-class PaymentRequest;
 @protocol PaymentRequestEditConsumer;
 
 namespace autofill {
 class AutofillProfile;
 }  // namespace autofill
 
+namespace payments {
+class PaymentRequest;
+}  // namespace payments
+
 // Serves as data source for AddressEditViewController.
 @interface AddressEditMediator
     : NSObject<PaymentRequestEditViewControllerDataSource,
@@ -34,7 +37,7 @@ class AutofillProfile;
 // of web::PaymentRequest as provided by the page invoking the Payment Request
 // API as well as |address| which is the address to be edited, if any.
 // This object will not take ownership of |paymentRequest| or |address|.
-- (instancetype)initWithPaymentRequest:(PaymentRequest*)paymentRequest
+- (instancetype)initWithPaymentRequest:(payments::PaymentRequest*)paymentRequest
                                address:(autofill::AutofillProfile*)address
     NS_DESIGNATED_INITIALIZER;