They are no longer available now and ListValue::GetList() should be used instead now. Chromium change: https://source.chromium.org/chromium/chromium/src/+/fe59284a48bc5a3af8f058b048e3cc1fe260a1b9 commit fe59284a48bc5a3af8f058b048e3cc1fe260a1b9 Author: David Bertoni <dbertoni@chromium.org> Date: Thu May 13 22:46:56 2021 +0000 [CodeHealth] Remove ListValue::begin()/end(). This CL removes these deprecated member function. Bug: 1187107