veyron/lib/websocket: fix build CL 8510.
veyron/lib/websocket: fix build CL 8510.

Change-Id: I5258b6c92682edfd71d1b34b22d6ec076e790df5

vanadium/go.ref,vanadium/go.ref,vanadium/go.ref,vanadium/go.ref,vanadium/go.ref,vanadium/go.ref