Change-Id: I68dcc392b0ae7c539c12c6306d9b312d02603b5b Reviewed-on: https://go-review.googlesource.com/6570 Reviewed-by: Nigel Tao <nigeltao@golang.org> Reviewed-by: David Crawshaw <crawshaw@golang.org> Reviewed-by: Hyang-Ah Hana Kim <hyangah@gmail.com>