Reported by bratell@opera.com.

Bug: angleproject:2727
Change-Id: I92750c11fc7d811fa627c8691f6f047023086239
Reviewed-on: https://chromium-review.googlesource.com/c/1289235Reviewed-by: Jamie Madill <jmadill@chromium.org>
Commit-Queue: Jamie Madill <jmadill@chromium.org>