BUG=angleproject:2546

Change-Id: I3ffc33649bad26f9d12580e398777b8b6c8ad542
Reviewed-on: https://chromium-review.googlesource.com/1059711Reviewed-by: Geoff Lang <geofflang@chromium.org>
Commit-Queue: Geoff Lang <geofflang@chromium.org>