[Payment Request] Fixes modally presented editors

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

Index: ios/chrome/browser/ui/payments/credit_card_edit_coordinator.mm
diff --git a/ios/chrome/browser/ui/payments/credit_card_edit_coordinator.mm b/ios/chrome/browser/ui/payments/credit_card_edit_coordinator.mm
index a75fa00cb9ba9ff360025af959ca926981ccd3b4..fcd567105b380246395067a5bffe1b26a265b7dd 100644
--- a/ios/chrome/browser/ui/payments/credit_card_edit_coordinator.mm
+++ b/ios/chrome/browser/ui/payments/credit_card_edit_coordinator.mm
@@ -69,6 +69,8 @@ bool IsValidCreditCardNumber(const base::string16& card_number,
 @property(nonatomic, strong)
     BillingAddressSelectionCoordinator* billingAddressSelectionCoordinator;
 
+@property(nonatomic, strong) UINavigationController* navigationController;
+
 @property(nonatomic, strong) PaymentRequestEditViewController* viewController;
 
 @property(nonatomic, strong) CreditCardEditViewControllerMediator* mediator;
@@ -82,6 +84,7 @@ bool IsValidCreditCardNumber(const base::string16& card_number,
 @synthesize delegate = _delegate;
 @synthesize billingAddressSelectionCoordinator =
     _billingAddressSelectionCoordinator;
+@synthesize navigationController = _navigationController;
 @synthesize viewController = _viewController;
 @synthesize mediator = _mediator;
 
@@ -101,18 +104,27 @@ bool IsValidCreditCardNumber(const base::string16& card_number,
   [_viewController setDataSource:_mediator];
   [_viewController loadModel];
 
-  [[self baseViewController] presentViewController:_viewController
+  self.navigationController = [[UINavigationController alloc]
+      initWithRootViewController:_viewController];
+  [self.navigationController
+      setModalPresentationStyle:UIModalPresentationFormSheet];
+  [self.navigationController
+      setModalTransitionStyle:UIModalTransitionStyleCoverVertical];
+  [self.navigationController setNavigationBarHidden:YES];
+
+  [[self baseViewController] presentViewController:self.navigationController
                                           animated:YES
                                         completion:nil];
 }
 
 - (void)stop {
-  [[self.viewController presentingViewController]
+  [[self.navigationController presentingViewController]
       dismissViewControllerAnimated:YES
                          completion:nil];
   [self.billingAddressSelectionCoordinator stop];
   self.billingAddressSelectionCoordinator = nil;
-  _viewController = nil;
+  self.viewController = nil;
+  self.navigationController = nil;
 }
 
 #pragma mark - PaymentRequestEditViewControllerValidator