As seen in CaptureGetTexParameteriv_params from
capture_gles_2_0_params.cpp.

Bug: angleproject:5645
Change-Id: Id687f73fd5d898e64e8a8bebe92ca50a0e096990
Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/2718044Reviewed-by: Jamie Madill <jmadill@chromium.org>
Reviewed-by: Cody Northrop <cnorthrop@google.com>
Commit-Queue: Jamie Madill <jmadill@chromium.org>