Trivial change to allow translator to be compiled via Emscripten.

BUG=none

Change-Id: Ifdb02d4b7c061f403f50d2e1fbea4ab117462475
Reviewed-on: https://chromium-review.googlesource.com/230813
Reviewed-by: Geoff Lang <geofflang@chromium.org>
Tested-by: Kenneth Russell <kbr@chromium.org>