BUG=angleproject:1493
BUG=chromium:638323

Change-Id: I5cab149c735158fe810f002e47cc3c5c75bc503b
Reviewed-on: https://chromium-review.googlesource.com/381951Reviewed-by: Corentin Wallez <cwallez@chromium.org>
Reviewed-by: Jamie Madill <jmadill@chromium.org>
Commit-Queue: Corentin Wallez <cwallez@chromium.org>