BUG=angleproject:1002

Change-Id: Id24783c75377ea92a73a43f2605693e07f63dc15
Reviewed-on: https://chromium-review.googlesource.com/270545Reviewed-by: Geoff Lang <geofflang@chromium.org>
Reviewed-by: Jamie Madill <jmadill@chromium.org>
Tested-by: Austin Kinross <aukinros@microsoft.com>