Credential Manager API pops up an auto-signin toast.

chrome/browser/ui/passwords/manage_passwords_bubble_model.h

Index: chrome/browser/ui/passwords/manage_passwords_bubble_model.h
diff --git a/chrome/browser/ui/passwords/manage_passwords_bubble_model.h b/chrome/browser/ui/passwords/manage_passwords_bubble_model.h
index 1c3693e3f91119edf20d85118710e2da7cff0807..4651b0006c0f5337c3f44899738f2d7792802b1f 100644
--- a/chrome/browser/ui/passwords/manage_passwords_bubble_model.h
+++ b/chrome/browser/ui/passwords/manage_passwords_bubble_model.h
@@ -80,6 +80,9 @@ class ManagePasswordsBubbleModel : public content::WebContentsObserver {
   // Called by the view code when the manage link is clicked by the user.
   void OnManageLinkClicked();
 
+  // Called by the view code when the auto-signin toast is about to close.
+  void OnAutoSignInToastTimeout();
+
   // Called by the view code to delete or add a password form to the
   // PasswordStore.
   void OnPasswordAction(const autofill::PasswordForm& password_form,