BUG=angleproject:1814

Change-Id: I152ae13b6b7cf0ba72259967f0f124e199b20e07
Reviewed-on: https://chromium-review.googlesource.com/471826Reviewed-by: Geoff Lang <geofflang@chromium.org>
Reviewed-by: Corentin Wallez <cwallez@chromium.org>
Commit-Queue: Jamie Madill <jmadill@chromium.org>