BUG=angleproject:2161

Change-Id: Ia2d4b4edcf9a40621573f124d14147224bbd8431
Reviewed-on: https://chromium-review.googlesource.com/891803
Commit-Queue: Geoff Lang <geofflang@chromium.org>
Reviewed-by: Jamie Madill <jmadill@chromium.org>