Connection: factor out #onWriteError
Connection: factor out #onWriteError

chenwenbin928/tchannel,bunnyblue/tchannel,sasa233/tchannel,i/tchannel,hustxiaoc/tchannel,savaki/tchannel,savaki/tchannel,savaki/tchannel,RyanTech/tchannel,i/tchannel,chenwenbin928/tchannel,RyanTech/tchannel,i/tchannel,sasa233/tchannel,Zirpon/tchannel,RyanTech/tchannel,bunnyblue/tchannel,benfleis/tchannel,sasa233/tchannel,vanloswang/tchannel,hustxiaoc/tchannel,hustxiaoc/tchannel,vanloswang/tchannel,Zirpon/tchannel,benfleis/tchannel,bunnyblue/tchannel,Zirpon/tchannel,vanloswang/tchannel,chenwenbin928/tchannel,benfleis/tchannel