BUG=angleproject:2546

Change-Id: I996c1344c93be7618ffbedd3e34e9aaa4855e25e
Reviewed-on: https://chromium-review.googlesource.com/1057989
Commit-Queue: Geoff Lang <geofflang@chromium.org>
Reviewed-by: Geoff Lang <geofflang@chromium.org>