Fix crash on login screen for Athena Chrome

chrome/browser/ui/webui/chromeos/login/signin_screen_handler.cc

Index: chrome/browser/ui/webui/chromeos/login/signin_screen_handler.cc
diff --git a/chrome/browser/ui/webui/chromeos/login/signin_screen_handler.cc b/chrome/browser/ui/webui/chromeos/login/signin_screen_handler.cc
index 6415cd98297d4df492bf3106585f531116fbf4ad..24cee1b974b2184ce3e2d3acb4c4c2ba7cfbc173 100644
--- a/chrome/browser/ui/webui/chromeos/login/signin_screen_handler.cc
+++ b/chrome/browser/ui/webui/chromeos/login/signin_screen_handler.cc
@@ -1326,7 +1326,10 @@ void SigninScreenHandler::HandleUpdateOfflineLogin(bool offline_login_active) {
 
 void SigninScreenHandler::HandleFocusPod(const std::string& user_id) {
   SetUserInputMethod(user_id);
+#if !defined(USE_ATHENA)
+  // TODO(dpolukhin):  crbug.com/408734.
   WallpaperManager::Get()->SetUserWallpaperDelayed(user_id);
+#endif
   ScreenlockBridge::Get()->SetFocusedUser(user_id);
 }