Chrome apps are deprecated on Win/Mac/Linux.[1] Even on Chrome OS, some apps APIs are obsolete: they're not used or they have web standards replacements.

There may also be obsolete extension APIs worth removing.

This is a tracking bug for identifying and removing obsolete APIs, or at least limiting the scope of APIs where we can -- especially private APIs used in very few places.

This bug is NOT about removing or disabling APIs that are in use.

[1] https://blog.chromium.org/2016/08/from-chrome-apps-to-web.html