Replace therubyracer with mini_racer #29285
therubyracer is a relic, it depends on an ancient version of v8 that has multiple known security vulnerabilities
In particular this is the equivalent of shipping a dependency to Chrome version 31.
Chrome 31 was released 2013-11-12
All places that talk about therubyracer or include it in templates should be replaced with mini_racer that depends on the most recent version of v8.
per: #29276 (comment)