BUG=angleproject:2306

Change-Id: I1c5a2dd40fb7d9b51cbf3fd37720a172578d76e8
Reviewed-on: https://chromium-review.googlesource.com/959105
Commit-Queue: Lingfeng Yang <lfy@google.com>
Reviewed-by: Geoff Lang <geofflang@chromium.org>
Reviewed-by: Jamie Madill <jmadill@chromium.org>