BUG=angleproject:2306

Change-Id: I46fe961e6eb87b2f41c39afe1e943d9146a0abfa
Reviewed-on: https://chromium-review.googlesource.com/1002913
Commit-Queue: Lingfeng Yang <lfy@google.com>
Reviewed-by: Geoff Lang <geofflang@chromium.org>