Use CollectionViewTextItem instead of a cast

ios/chrome/browser/ui/settings/autofill_collection_view_controller.mm

Index: ios/chrome/browser/ui/settings/autofill_collection_view_controller.mm
diff --git a/ios/chrome/browser/ui/settings/autofill_collection_view_controller.mm b/ios/chrome/browser/ui/settings/autofill_collection_view_controller.mm
index 20a40cab593f4dcfb182a3f7ddb14b80b0e2ffc6..13c22d51c03624439ae4595cfd87c3884d958811 100644
--- a/ios/chrome/browser/ui/settings/autofill_collection_view_controller.mm
+++ b/ios/chrome/browser/ui/settings/autofill_collection_view_controller.mm
@@ -170,16 +170,21 @@ typedef NS_ENUM(NSInteger, ItemType) {
 }
 
 - (CollectionViewItem*)profileSectionHeader {
-  CollectionViewTextItem* header = [
-      [[CollectionViewTextItem alloc] initWithType:ItemTypeHeader] autorelease];
+  CollectionViewTextItem* header = [self genericHeader];
   header.text = l10n_util::GetNSString(IDS_IOS_AUTOFILL_ADDRESSES_GROUP_NAME);
   return header;
 }
 
 - (CollectionViewItem*)cardSectionHeader {
+  CollectionViewTextItem* header = [self genericHeader];
+  header.text = l10n_util::GetNSString(IDS_IOS_AUTOFILL_CREDITCARDS_GROUP_NAME);
+  return header;
+}
+
+- (CollectionViewTextItem*)genericHeader {
   CollectionViewTextItem* header = [
       [[CollectionViewTextItem alloc] initWithType:ItemTypeHeader] autorelease];
-  header.text = l10n_util::GetNSString(IDS_IOS_AUTOFILL_CREDITCARDS_GROUP_NAME);
+  header.textColor = [[MDCPalette greyPalette] tint500];
   return header;
 }
 
@@ -269,20 +274,6 @@ typedef NS_ENUM(NSInteger, ItemType) {
   return cell;
 }
 
-- (UICollectionReusableView*)collectionView:(UICollectionView*)collectionView
-          viewForSupplementaryElementOfKind:(NSString*)kind
-                                atIndexPath:(NSIndexPath*)indexPath {
-  UICollectionReusableView* view = [super collectionView:collectionView
-                       viewForSupplementaryElementOfKind:kind
-                                             atIndexPath:indexPath];
-  MDCCollectionViewTextCell* textCell =
-      base::mac::ObjCCast<MDCCollectionViewTextCell>(view);
-  if (textCell) {
-    textCell.textLabel.textColor = [[MDCPalette greyPalette] tint500];
-  }
-  return view;
-}
-
 #pragma mark - Switch Callbacks
 
 - (void)autofillSwitchChanged:(UISwitch*)switchView {