BUG=angleproject:961

Change-Id: I61931961f8cb86b47012edd2bc08d0e1e7a5d0f7
Reviewed-on: https://chromium-review.googlesource.com/266515Reviewed-by: Jamie Madill <jmadill@chromium.org>
Reviewed-by: John Bauman <jbauman@chromium.org>
Tested-by: Geoff Lang <geofflang@chromium.org>