Visible on master: https://master-api.flutter.dev/flutter/material/Icons-class.html

Issue is probably with dev/docs/styles.html.

May need to follow the instructions in here: https://stackoverflow.com/questions/50303454/how-to-use-the-new-material-design-icon-themes-outlined-rounded-two-tone-and

In contact with Google Fonts team to double check.

Will require a change to the script to massage the names. https://github.com/flutter/flutter/blob/master/dev/tools/update_icons.dart

Then rerun it and regenerate flutter/lib/src/material/icons.dart