ignore protocol error from closing tab after Chrome has been killed (#1592)
ignore protocol error from closing tab after Chrome has been killed (#1592)


wardpeet/lighthouse,GoogleChrome/lighthouse,wardpeet/lighthouse,tommycli/lighthouse,arturmiz/lighthouse,deepanjanroy/lighthouse,deepanjanroy/lighthouse,tommycli/lighthouse,deepanjanroy/lighthouse,tommycli/lighthouse,arturmiz/lighthouse,wardpeet/lighthouse,wardpeet/lighthouse,tkadlec/lighthouse,tkadlec/lighthouse,umaar/lighthouse,tkadlec/lighthouse,arturmiz/lighthouse,arturmiz/lighthouse,ev1stensberg/lighthouse,tommycli/lighthouse,umaar/lighthouse,mixed/lighthouse,mixed/lighthouse,GoogleChrome/lighthouse,cedricbellet/lighthouse,deepanjanroy/lighthouse,ev1stensberg/lighthouse,umaar/lighthouse,cedricbellet/lighthouse,mixed/lighthouse,umaar/lighthouse,wardpeet/lighthouse,arturmiz/lighthouse,GoogleChrome/lighthouse,GoogleChrome/lighthouse,GoogleChrome/lighthouse,cedricbellet/lighthouse,ev1stensberg/lighthouse,mixed/lighthouse,ev1stensberg/lighthouse,tkadlec/lighthouse,tommycli/lighthouse,cedricbellet/lighthouse,cedricbellet/lighthouse,deepanjanroy/lighthouse