Adding ChromeIdentity in ShowSigninCommand.

ios/chrome/browser/ui/authentication/signin_promo_view_mediator.mm

Index: ios/chrome/browser/ui/authentication/signin_promo_view_mediator.mm
diff --git a/ios/chrome/browser/ui/authentication/signin_promo_view_mediator.mm b/ios/chrome/browser/ui/authentication/signin_promo_view_mediator.mm
index d8dc94de9ca78c9e6abce5d5935eeccc0f5c5f9f..a5e5d46d6ef2520245d40b3f18e1c4761d959777 100644
--- a/ios/chrome/browser/ui/authentication/signin_promo_view_mediator.mm
+++ b/ios/chrome/browser/ui/authentication/signin_promo_view_mediator.mm
@@ -207,9 +207,11 @@ void RecordSigninNewAccountUserActionForAccessPoint(
   RecordSigninUserActionForAccessPoint(_accessPoint);
   RecordSigninDefaultUserActionForAccessPoint(_accessPoint);
   ShowSigninCommand* command = [[ShowSigninCommand alloc]
-      initWithOperation:AUTHENTICATION_OPERATION_SIGNIN_PROMO_CONTINUE_AS
+      initWithOperation:AUTHENTICATION_OPERATION_SIGNIN
+               identity:_defaultIdentity
             accessPoint:_accessPoint
-            promoAction:signin_metrics::PromoAction::PROMO_ACTION_WITH_DEFAULT];
+            promoAction:signin_metrics::PromoAction::PROMO_ACTION_WITH_DEFAULT
+               callback:nil];
   [signinPromoView chromeExecuteCommand:command];
 }