This introduced a flaky failure to the multisample resolve blit tests.
They would work sometimes if the state had set the correct viewport
previously, so it wasn't always evident there was a bug.
BUG=angleproject:1246
Change-Id: If16d574fb87484fcdc9b7cc6ecc0531ee4a8959d
Reviewed-on: https://chromium-review.googlesource.com/362699Reviewed-by: Jamie Madill <jmadill@chromium.org>
Commit-Queue: Jamie Madill <jmadill@chromium.org>
Reviewed-by: Zhenyao Mo <zmo@chromium.org>
