Implement state tracking for BASE/MAX_LEVEL, and MIN/MAX_LOD. BUG=angle:596 Change-Id: I773720a19b766c7a6930967983db0a34e84f2790 Reviewed-on: https://chromium-review.googlesource.com/193235 Tested-by: Nicolas Capens <nicolascapens@chromium.org> Reviewed-by: Shannon Woods <shannonwoods@chromium.org> Reviewed-by: Jamie Madill <jmadill@chromium.org>