From the ES3.0 spec:
The error INVALID_VALUE is generated if texture is non-zero and layer
is negative.

BUG=765919

Change-Id: I0ac9bd0335ab4d55701d6def0158297d5add993e
Reviewed-on: https://chromium-review.googlesource.com/723741Reviewed-by: Jamie Madill <jmadill@chromium.org>
Reviewed-by: Yuly Novikov <ynovikov@chromium.org>
Commit-Queue: Geoff Lang <geofflang@chromium.org>