BUG=angleproject:888

Change-Id: Ic5eca4d88854f8127114d6b54666f32d5d6df9f2
Reviewed-on: https://chromium-review.googlesource.com/264588Reviewed-by: Jamie Madill <jmadill@chromium.org>
Reviewed-by: Kenneth Russell <kbr@chromium.org>
Tested-by: Geoff Lang <geofflang@chromium.org>