BUG=angleproject:1354

Change-Id: I979c8768975380dba7f0b256b2729b2147ff7984
Reviewed-on: https://chromium-review.googlesource.com/399042
Commit-Queue: Geoff Lang <geofflang@chromium.org>
Reviewed-by: Corentin Wallez <cwallez@chromium.org>