Initially I wondered if this was some kind of smokescreen, or a public response to some private action that wasn't liked.
But thinking about it... maybe it's simpler, and Google are just unimpressed someone's having a go at them for being anticompetitive. In which case this action is very concerning, because it says "yeah, we're it and we know it. Deal with it." That has significant chilling-effect potential.
Because I'm not seeing any evidence or suggestion of corruption here, but rather an interest in establishing truth.