Do not try to pop up the account chooser if there is no browser window.

chrome/browser/ui/passwords/manage_passwords_ui_controller.h

Index: chrome/browser/ui/passwords/manage_passwords_ui_controller.h
diff --git a/chrome/browser/ui/passwords/manage_passwords_ui_controller.h b/chrome/browser/ui/passwords/manage_passwords_ui_controller.h
index ed0f2b171c17cfa76fc8a6dd62821d93a68c037c..40827b8965b32ff0bf456876fb5179e58c6f0ceb 100644
--- a/chrome/browser/ui/passwords/manage_passwords_ui_controller.h
+++ b/chrome/browser/ui/passwords/manage_passwords_ui_controller.h
@@ -137,6 +137,9 @@ class ManagePasswordsUIController
   virtual AutoSigninFirstRunPrompt* CreateAutoSigninPrompt(
       PasswordDialogController* controller);
 
+  // Check if |web_contents()| is attached to some Browser. Mocked in tests.
+  virtual bool HasBrowserWindow() const;
+
   // Overwrites the client for |passwords_data_|.
   void set_client(password_manager::PasswordManagerClient* client) {
     passwords_data_.set_client(client);