BUG=angleproject:520

Change-Id: I9ced3e7ab1515feddf2ec103c26b2610a45b1784
Reviewed-on: https://chromium-review.googlesource.com/319830
Tryjob-Request: Geoff Lang <geofflang@chromium.org>
Reviewed-by: Geoff Lang <geofflang@chromium.org>
Tested-by: Geoff Lang <geofflang@chromium.org>