[Payment Request] Selector view edit mode

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

Index: ios/chrome/browser/ui/payments/billing_address_selection_mediator.mm
diff --git a/ios/chrome/browser/ui/payments/billing_address_selection_mediator.mm b/ios/chrome/browser/ui/payments/billing_address_selection_mediator.mm
index 2f1c5f087c051a0407c33633ee8e5f21b5cbad68..472477eec51df9adf09ecbb60006e4c08c7e823f 100644
--- a/ios/chrome/browser/ui/payments/billing_address_selection_mediator.mm
+++ b/ios/chrome/browser/ui/payments/billing_address_selection_mediator.mm
@@ -38,7 +38,7 @@ using ::payment_request_util::GetPhoneNumberLabelFromAutofillProfile;
 @property(nonatomic, assign) autofill::AutofillProfile* selectedBillingProfile;
 
 // The selectable items to display in the collection.
-@property(nonatomic, strong) NSArray<AutofillProfileItem*>* items;
+@property(nonatomic, strong) NSMutableArray<AutofillProfileItem*>* items;
 
 @end
 
@@ -59,13 +59,17 @@ using ::payment_request_util::GetPhoneNumberLabelFromAutofillProfile;
     _paymentRequest = paymentRequest;
     _selectedBillingProfile = selectedBillingProfile;
     _selectedItemIndex = NSUIntegerMax;
-    _items = [self createItems];
+    [self loadItems];
   }
   return self;
 }
 
 #pragma mark - PaymentRequestSelectorViewControllerDataSource
 
+- (BOOL)allowsEditMode {
+  return YES;
+}
+
 - (CollectionViewItem*)headerItem {
   return nil;
 }
@@ -81,14 +85,13 @@ using ::payment_request_util::GetPhoneNumberLabelFromAutofillProfile;
   return addButtonItem;
 }
 
-#pragma mark - Helper methods
+#pragma mark - Public methods
 
-- (NSArray<AutofillProfileItem*>*)createItems {
+- (void)loadItems {
   const std::vector<autofill::AutofillProfile*>& billingProfiles =
       _paymentRequest->billing_profiles();
 
-  NSMutableArray<AutofillProfileItem*>* items =
-      [NSMutableArray arrayWithCapacity:billingProfiles.size()];
+  _items = [NSMutableArray arrayWithCapacity:billingProfiles.size()];
   for (size_t index = 0; index < billingProfiles.size(); ++index) {
     autofill::AutofillProfile* billingProfile = billingProfiles[index];
     DCHECK(billingProfile);
@@ -99,10 +102,8 @@ using ::payment_request_util::GetPhoneNumberLabelFromAutofillProfile;
     if (self.selectedBillingProfile == billingProfile)
       _selectedItemIndex = index;
 
-    [items addObject:item];
+    [_items addObject:item];
   }
-
-  return items;
 }
 
 @end