GitHub:11199 GitHub:11200 GitHub:11622 GitHub:11728 (remove incomplet…

…e features)

Automated synchronisation from changelist: 281168

Automated synchronisation from changelist: 278778

Automated synchronisation from changelist: 278778

Automated synchronisation from changelist: 278604

Automated synchronisation from changelist: 274910

Automated synchronisation from changelist: 271675

Automated synchronisation from changelist: 271675