Do this in a separate CL to preserve the renderer generation.

BUG=angleproject:1319

Change-Id: I6d5768f199f6aabff747b3708c0625ff78e1ceb0
Reviewed-on: https://chromium-review.googlesource.com/349424Reviewed-by: Corentin Wallez <cwallez@chromium.org>
Reviewed-by: Geoff Lang <geofflang@chromium.org>
Commit-Queue: Jamie Madill <jmadill@chromium.org>