BUG=angleproject:1262

Change-Id: Ifbb0f5302311a68a0c6f02baaea706cbb7055a52
Reviewed-on: https://chromium-review.googlesource.com/320011Reviewed-by: Geoff Lang <geofflang@chromium.org>
Tested-by: Geoff Lang <geofflang@chromium.org>