io: fix the broken build

Change-Id: I3adb614bb35916877d712cd76db647dccbf2e5f9
Reviewed-on: https://go-review.googlesource.com/23613
Run-TryBot: Jaana Burcu Dogan <jbd@google.com>
Reviewed-by: Jaana Burcu Dogan <jbd@google.com>
2 files changed