[Payment Request] Moves PaymentRequest into the payments namespace

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

Index: ios/chrome/browser/ui/payments/credit_card_edit_mediator.h
diff --git a/ios/chrome/browser/ui/payments/credit_card_edit_mediator.h b/ios/chrome/browser/ui/payments/credit_card_edit_mediator.h
index 0bdf723bc11e7896dbe92dae1b38a7a6a7cd8dd9..5e6bedd76c0f692a78f6f883a920dc144aaea011 100644
--- a/ios/chrome/browser/ui/payments/credit_card_edit_mediator.h
+++ b/ios/chrome/browser/ui/payments/credit_card_edit_mediator.h
@@ -7,7 +7,6 @@
 
 #import "ios/chrome/browser/ui/payments/payment_request_edit_view_controller_data_source.h"
 
-class PaymentRequest;
 @protocol PaymentRequestEditConsumer;
 
 namespace autofill {
@@ -15,6 +14,10 @@ class AutofillProfile;
 class CreditCard;
 }  // namespace autofill
 
+namespace payments {
+class PaymentRequest;
+}  // namespace payments
+
 // Serves as data source for CreditCardEditViewController.
 @interface CreditCardEditViewControllerMediator
     : NSObject<PaymentRequestEditViewControllerDataSource>
@@ -30,7 +33,7 @@ class CreditCard;
 // of web::PaymentRequest as provided by the page invoking the Payment Request
 // API as well as |creditCard| which is the credit card to be edited, if any.
 // This object will not take ownership of |paymentRequest| or |creditCard|.
-- (instancetype)initWithPaymentRequest:(PaymentRequest*)paymentRequest
+- (instancetype)initWithPaymentRequest:(payments::PaymentRequest*)paymentRequest
                             creditCard:(autofill::CreditCard*)creditCard
     NS_DESIGNATED_INITIALIZER;