BUG=angleproject:2306

Change-Id: Ibb168d5c9f7aa96a48c96ffbe96ecead2276975e
Reviewed-on: https://chromium-review.googlesource.com/1092101
Commit-Queue: Lingfeng Yang <lfy@google.com>
Reviewed-by: Geoff Lang <geofflang@chromium.org>