BUG=angleproject:520

Change-Id: I78d14cc8c94f5cef58604220f0ca847473b25bf8
Reviewed-on: https://chromium-review.googlesource.com/317820
Tryjob-Request: Geoff Lang <geofflang@chromium.org>
Reviewed-by: Geoff Lang <geofflang@chromium.org>
Tested-by: Geoff Lang <geofflang@chromium.org>