The JavaScript i18n parser uses i18n-content and i18n-values to perform i18n. We are using a newer template replacement system that uses $i18n{} to replace values in C++ (which is much faster). The plan is to phase out the old i18n-* replacement.
These changes only affect webui and shared resources, such as chrome://settings, chrome://downloads, the new tab page and similar 'build-in' pages. (Not pages downloaded in the normal way).
Comment 1 by bugdroid1@chromium.org
, Jan 5 2017