[Payment Request] Moves PaymentRequest into the payments namespace

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

Index: ios/chrome/browser/ui/payments/address_edit_mediator.mm
diff --git a/ios/chrome/browser/ui/payments/address_edit_mediator.mm b/ios/chrome/browser/ui/payments/address_edit_mediator.mm
index 0ee0c5e19c2643d016daa325e23e2d30b5851919..1590f90c09f589085b5f7b331729f98f1e1c431e 100644
--- a/ios/chrome/browser/ui/payments/address_edit_mediator.mm
+++ b/ios/chrome/browser/ui/payments/address_edit_mediator.mm
@@ -44,7 +44,7 @@
 // The PaymentRequest object owning an instance of web::PaymentRequest as
 // provided by the page invoking the Payment Request API. This is a weak
 // pointer and should outlive this class.
-@property(nonatomic, assign) PaymentRequest* paymentRequest;
+@property(nonatomic, assign) payments::PaymentRequest* paymentRequest;
 
 // The address to be edited, if any. This pointer is not owned by this class and
 // should outlive it.
@@ -76,7 +76,7 @@
 @synthesize fields = _fields;
 @synthesize regionField = _regionField;
 
-- (instancetype)initWithPaymentRequest:(PaymentRequest*)paymentRequest
+- (instancetype)initWithPaymentRequest:(payments::PaymentRequest*)paymentRequest
                                address:(autofill::AutofillProfile*)address {
   self = [super init];
   if (self) {