NetLogSpdyPingCallback 2415 net/spdy/spdy_session.cc       base::Bind(&NetLogSpdyPingCallback, unique_id, is_ack, "received"));
NetLogSpdyPingCallback 2700 net/spdy/spdy_session.cc         base::Bind(&NetLogSpdyPingCallback, unique_id, is_ack, "sent"));