BUG=angleproject:965

Change-Id: I9b4b042e3f9bde3ce713a02aa353b5f3a5cff49e
Reviewed-on: https://chromium-review.googlesource.com/263711Reviewed-by: Jamie Madill <jmadill@chromium.org>
Reviewed-by: Geoff Lang <geofflang@chromium.org>
Tested-by: Gregoire Payen de La Garanderie <Gregory.Payen@imgtec.com>