[Signin iOS] Handle unnamed account in Account Settings screen.

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

Index: ios/chrome/browser/ui/settings/accounts_collection_view_controller.mm
diff --git a/ios/chrome/browser/ui/settings/accounts_collection_view_controller.mm b/ios/chrome/browser/ui/settings/accounts_collection_view_controller.mm
index 35ebc135190ef2f741ec1f26b89766821066faea..0d978128f1a07f85f859d36ba57b499b89e352e7 100644
--- a/ios/chrome/browser/ui/settings/accounts_collection_view_controller.mm
+++ b/ios/chrome/browser/ui/settings/accounts_collection_view_controller.mm
@@ -186,8 +186,7 @@ typedef NS_ENUM(NSInteger, ItemType) {
   if (authenticatedIdentity) {
     title = [authenticatedIdentity userFullName];
     if (!title) {
-      // TODO(crbug.com/656994): Figure how to handle unnamed account.
-      title = @"Unnamed account";
+      title = [authenticatedIdentity userEmail];
     }
   }
   self.title = title;